コード例 #1
0
ファイル: machdep.c プロジェクト: MarginC/kame
/*
 * Early initialization, right before main is called.
 */
void
mvme68k_init()
{
	int i;

	/*
	 * Tell the VM system about available physical memory.
	 */
	for (i = 0; i < mem_cluster_cnt; i++) {
		if (phys_seg_list[i].ps_start == phys_seg_list[i].ps_end) {
			/*
			 * Segment has been completely gobbled up.
			 */
			continue;
		}
		/*
		 * Note the index of the mem cluster is the free
		 * list we want to put the memory on (0 == default,
		 * 1 == VME).  There can only be two.
		 */
		uvm_page_physload(atop(phys_seg_list[i].ps_start),
				 atop(phys_seg_list[i].ps_end),
				 atop(phys_seg_list[i].ps_start),
				 atop(phys_seg_list[i].ps_end), i);
	}

	/* Initialize interrupt handlers. */
	isrinit();

	switch (machineid) {
#ifdef MVME147
	case MVME_147:
		mvme147_init();
		break;
#endif
#ifdef MVME162
	case MVME_162:
		mvme162_init();
		break;
#endif
#ifdef MVME167
	case MVME_167:
		mvme167_init();
		break;
#endif
	default:
		panic("mvme68k_init: impossible machineid");
	}

	/*
	 * Initialize error message buffer (at end of core).
	 */
	for (i = 0; i < btoc(round_page(MSGBUFSIZE)); i++)
		pmap_enter(pmap_kernel(), (vaddr_t)msgbufaddr + i * NBPG,
		    msgbufpa + i * NBPG, VM_PROT_READ|VM_PROT_WRITE, TRUE,
		    VM_PROT_READ|VM_PROT_WRITE);
	initmsgbuf(msgbufaddr, round_page(MSGBUFSIZE));
}
コード例 #2
0
ファイル: machdep.c プロジェクト: lacombar/netbsd-alc
/*
 * Early initialization, before main() is called.
 */
void
luna68k_init()
{
	volatile unsigned char *pio0 = (void *)0x49000000;
	int sw1, i;
	char *cp;
	extern char bootarg[64];

	extern paddr_t avail_start, avail_end;

	/*
	 * Tell the VM system about available physical memory.  The
	 * luna68k only has one segment.
	 */
	uvm_page_physload(atop(avail_start), atop(avail_end),
	    atop(avail_start), atop(avail_end), VM_FREELIST_DEFAULT);

	/*
	 * Initialize error message buffer (at end of core).
	 * avail_end was pre-decremented in pmap_bootstrap to compensate.
	 */
	for (i = 0; i < btoc(MSGBUFSIZE); i++)
		pmap_enter(pmap_kernel(), (vaddr_t)msgbufaddr + i * PAGE_SIZE,
		    avail_end + i * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE,
		    VM_PROT_READ|VM_PROT_WRITE|PMAP_WIRED);
	pmap_update(pmap_kernel());
	initmsgbuf(msgbufaddr, m68k_round_page(MSGBUFSIZE));


	pio0[3] = 0xb6;
	pio0[2] = 1 << 6;		/* enable parity check */
	pio0[3] = 0xb6;
	sw1 = pio0[0];			/* dipssw1 value */
	sw1 ^= 0xff;
	sysconsole = !(sw1 & 0x2);	/* console selection */

	boothowto = 0;
	i = 0;
	/*
	 * 'bootarg' has;
	 *   "<args of x command> ENADDR=<addr> HOST=<host> SERVER=<name>"
	 * where <addr> is MAC address of which network loader used (not
	 * necessarily same as one at 0x4101.FFE0), <host> and <name>
	 * are the values of HOST and SERVER environment variables,
	 *
	 * NetBSD/luna68k cares only the first argment; any of "sda".
	 */
	for (cp = bootarg; *cp != ' '; cp++) {
		BOOT_FLAG(*cp, boothowto);
		if (i++ >= sizeof(bootarg))
			break;
	}
#if 0 /* overload 1:sw1, which now means 'go ROM monitor' after poweron */
	if (boothowto == 0)
		boothowto = (sw1 & 0x1) ? RB_SINGLE : 0;
#endif
}
コード例 #3
0
__dead void
landisk_startup(int howto, char *_esym)
{
	u_int32_t ramsize;

	/* Start to determine heap area */
	esym = _esym;
	kernend = (vaddr_t)round_page((vaddr_t)esym);

	boothowto = howto;

	ramsize = getramsize();

	/* Initialize CPU ops. */
	sh_cpu_init(CPU_ARCH_SH4, CPU_PRODUCT_7751R);	

	/* Initialize early console */
	consinit();

	/* Load memory to UVM */
	if (ramsize == 0 || ramsize > 512 * 1024 * 1024)
		ramsize = IOM_RAM_SIZE;
	physmem = atop(ramsize);
	kernend = atop(round_page(SH3_P1SEG_TO_PHYS(kernend)));
	uvm_page_physload(atop(IOM_RAM_BEGIN),
	    atop(IOM_RAM_BEGIN + ramsize), kernend,
	    atop(IOM_RAM_BEGIN + ramsize), 0);
	cpu_init_kcore_hdr();	/* need to be done before pmap_bootstrap */

	/* Initialize proc0 u-area */
	sh_proc0_init();

	/* Initialize pmap and start to address translation */
	pmap_bootstrap();

#if defined(DDB)
	db_machine_init();
	ddb_init();
	if (boothowto & RB_KDB) {
		Debugger();
	}
#endif

	/* Jump to main */
	__asm volatile(
		"jmp	@%0\n\t"
		" mov	%1, sp"
		:: "r" (main), "r" (proc0.p_md.md_pcb->pcb_sf.sf_r7_bank));
	/* NOTREACHED */
	for (;;) ;
}
コード例 #4
0
ファイル: machdep.c プロジェクト: MarginC/kame
void
dreamcast_startup()
{
	extern char edata[], end[];
	paddr_t kernend;

	/* Clear bss */
	memset(edata, 0, end - edata);

	/* Initialize CPU ops. */
	sh_cpu_init(CPU_ARCH_SH4, CPU_PRODUCT_7750);

	/* Console */
	consinit();

	/* Load memory to UVM */
	physmem = atop(IOM_RAM_SIZE);
	kernend = atop(round_page(SH3_P1SEG_TO_PHYS(end)));
	uvm_page_physload(
		kernend, atop(IOM_RAM_BEGIN + IOM_RAM_SIZE),
		kernend, atop(IOM_RAM_BEGIN + IOM_RAM_SIZE),
		VM_FREELIST_DEFAULT);

	/* Initialize proc0 u-area */
	sh_proc0_init();

	/* Initialize pmap and start to address translation */
	pmap_bootstrap();

	/* Debugger. */
#ifdef DDB
	ddb_init(0, NULL, NULL);
#endif
#if defined(KGDB) && (NSCIF > 0)
	if (scif_kgdb_init() == 0) {
		kgdb_debug_init = 1;
		kgdb_connect(1);
	}
#endif /* KGDB && NSCIF > 0 */

	/* Jump to main */
	__asm__ __volatile__(
		"jmp	@%0;"
		"mov	%1, sp"
		:: "r"(main),"r"(proc0.p_md.md_pcb->pcb_sf.sf_r7_bank));
	/* NOTREACHED */
	while (1)
		;
}
コード例 #5
0
ファイル: machdep.c プロジェクト: genua/anoubis_os
void
mvme68k_init()
{
	extern vaddr_t avail_start;

	/*
	 * Tell the VM system about available physical memory.  The
	 * mvme68k only has one segment.
	 */

	uvmexp.pagesize = NBPG;
	uvm_setpagesize();
	uvm_page_physload(atop(avail_start), atop(avail_end),
	    atop(avail_start), atop(avail_end), VM_FREELIST_DEFAULT);

	/* 
	 * Put machine specific exception vectors in place.
	 */
	initvectors();
}
コード例 #6
0
ファイル: machdep.c プロジェクト: MarginC/kame
void
mem_cluster_load()
{
	paddr_t start, end;
	psize_t size;
	int i;

	/* Cluster 0 is always the kernel, which doesn't get loaded. */
	sh_dcache_wbinv_all();
	for (i = 1; i < mem_cluster_cnt; i++) {
		start = (paddr_t)mem_clusters[i].start;
		size = (psize_t)mem_clusters[i].size;

		_DPRINTF("loading 0x%lx,0x%lx\n", start, size);
		memset((void *)SH3_PHYS_TO_P1SEG(start), 0, size);
		end = atop(start + size);
		start = atop(start);
		uvm_page_physload(start, end, start, end, VM_FREELIST_DEFAULT);
	}
	sh_dcache_wbinv_all();
}
コード例 #7
0
void fic_init(void)
{
	int i;

	extern paddr_t avail_start, avail_end;

	boothowto = RB_SINGLE; /* XXX for now */
	boothowto |= RB_KDB; /* XXX for now */

	delay_divisor = 30; /* XXX */

	/*
	 * Tell the VM system about available physical memory.  The
	 * fic uses one segment.
	 */
	uvm_page_physload(atop(avail_start), atop(avail_end),
	    atop(avail_start), atop(avail_end), VM_FREELIST_DEFAULT);

	/*
	 * map and init interrupt controller
	 */
	physaccess((void*)virtual_avail, (void*)0x44000000,
	    PAGE_SIZE, PG_RW|PG_CI);
	sicinit((void*)virtual_avail);
	virtual_avail += PAGE_SIZE;

	/*
	 * Initialize error message buffer (at end of core).
	 * avail_end was pre-decremented in pmap_bootstrap to compensate.
	 */
	for (i = 0; i < btoc(MSGBUFSIZE); i++)
		pmap_enter(pmap_kernel(), (vaddr_t)msgbufaddr + i * PAGE_SIZE,
		    avail_end + i * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE,
		    VM_PROT_READ|VM_PROT_WRITE|PMAP_WIRED);
	pmap_update(pmap_kernel());
	initmsgbuf(msgbufaddr, m68k_round_page(MSGBUFSIZE));
}
コード例 #8
0
/*
 * Do all the stuff that locore normally does before calling main().
 * Process arguments passed to us by the prom monitor.
 * Return the first page address following the system.
 */
void
mach_init(int x_boothowto, int x_bootdev, int x_bootname, int x_maxmem)
{
	u_long first, last;
	char *kernend;
	struct btinfo_magic *bi_magic;
	struct btinfo_bootarg *bi_arg;
	struct btinfo_systype *bi_systype;
#if NKSYMS || defined(DDB) || defined(MODULAR)
	struct btinfo_symtab *bi_sym;
	int nsym = 0;
	char *ssym, *esym;

	ssym = esym = NULL;	/* XXX: gcc */
#endif
	bi_arg = NULL;

	bootinfo = (void *)BOOTINFO_ADDR;	/* XXX */
	bi_magic = lookup_bootinfo(BTINFO_MAGIC);
	if (bi_magic && bi_magic->magic == BOOTINFO_MAGIC) {
		bi_arg = lookup_bootinfo(BTINFO_BOOTARG);
		if (bi_arg) {
			x_boothowto = bi_arg->howto;
			x_bootdev = bi_arg->bootdev;
			x_maxmem = bi_arg->maxmem;
		}
#if NKSYMS || defined(DDB) || defined(MODULAR)
		bi_sym = lookup_bootinfo(BTINFO_SYMTAB);
		if (bi_sym) {
			nsym = bi_sym->nsym;
			ssym = (void *)bi_sym->ssym;
			esym = (void *)bi_sym->esym;
		}
#endif

		bi_systype = lookup_bootinfo(BTINFO_SYSTYPE);
		if (bi_systype)
			systype = bi_systype->type;
	} else {
		/*
		 * Running kernel is loaded by non-native loader;
		 * clear the BSS segment here.
		 */
		memset(edata, 0, end - edata);
	}

	if (systype == 0) 
		systype = NEWS3400;	/* XXX compatibility for old boot */

#ifdef news5000
	if (systype == NEWS5000) {
		int i;
		char *bootspec = (char *)x_bootdev;

		if (bi_arg == NULL)
			panic("news5000 requires BTINFO_BOOTARG to boot");

		_sip = (void *)bi_arg->sip;
		x_maxmem = _sip->apbsi_memsize;
		x_maxmem -= 0x00100000;	/* reserve 1MB for ROM monitor */
		if (strncmp(bootspec, "scsi", 4) == 0) {
			x_bootdev = (5 << 28) | 0;	 /* magic, sd */
			bootspec += 4;
			if (*bootspec != '(' /*)*/)
				goto bootspec_end;
			i = strtoul(bootspec + 1, &bootspec, 10);
			x_bootdev |= (i << 24);		/* bus */
			if (*bootspec != ',')
				goto bootspec_end;
			i = strtoul(bootspec + 1, &bootspec, 10);
			x_bootdev |= (i / 10) << 20;	/* controller */
			x_bootdev |= (i % 10) << 16;	/* unit */
			if (*bootspec != ',')
				goto bootspec_end;
			i = strtoul(bootspec + 1, &bootspec, 10);
			x_bootdev |= (i << 8);		/* partition */
		}
 bootspec_end:
		consinit();
	}
#endif

	/*
	 * Save parameters into kernel work area.
	 */
	*(int *)(MIPS_PHYS_TO_KSEG1(MACH_MAXMEMSIZE_ADDR)) = x_maxmem;
	*(int *)(MIPS_PHYS_TO_KSEG1(MACH_BOOTDEV_ADDR)) = x_bootdev;
	*(int *)(MIPS_PHYS_TO_KSEG1(MACH_BOOTSW_ADDR)) = x_boothowto;

	kernend = (char *)mips_round_page(end);
#if NKSYMS || defined(DDB) || defined(MODULAR)
	if (nsym)
		kernend = (char *)mips_round_page(esym);
#endif

	/*
	 * Set the VM page size.
	 */
	uvm_setpagesize();

	boothowto = x_boothowto;
	bootdev = x_bootdev;
	physmem = btoc(x_maxmem);

	/*
	 * Now that we know how much memory we have, initialize the
	 * mem cluster array.
	 */
	mem_clusters[0].start = 0;		/* XXX is this correct? */
	mem_clusters[0].size  = ctob(physmem);
	mem_cluster_cnt = 1;

	/*
	 * Copy exception-dispatch code down to exception vector.
	 * Initialize locore-function vector.
	 * Clear out the I and D caches.
	 */
	mips_vector_init(NULL, false);

	/*
	 * We know the CPU type now.  Initialize our DMA tags (might
	 * need this early).
	 */
	newsmips_bus_dma_init();

#if NKSYMS || defined(DDB) || defined(MODULAR)
	if (nsym)
		ksyms_addsyms_elf(esym - ssym, ssym, esym);
#endif

#ifdef KADB
	boothowto |= RB_KDB;
#endif

	/*
	 * Check to see if a mini-root was loaded into memory. It resides
	 * at the start of the next page just after the end of BSS.
	 */
	if (boothowto & RB_MINIROOT)
		kernend += round_page(mfs_initminiroot(kernend));

	/*
	 * Load the rest of the available pages into the VM system.
	 */
	first = round_page(MIPS_KSEG0_TO_PHYS(kernend));
	last = mem_clusters[0].start + mem_clusters[0].size;
	uvm_page_physload(atop(first), atop(last), atop(first), atop(last),
	    VM_FREELIST_DEFAULT);

	/*
	 * Initialize error message buffer (at end of core).
	 */
	mips_init_msgbuf();

	/*
	 * Initialize the virtual memory system.
	 */
	pmap_bootstrap();

	/*
	 * Allocate uarea page for lwp0 and set it.
	 */
	mips_init_lwp0_uarea();

	/*
	 * Determine what model of computer we are running on.
	 */
	switch (systype) {
#ifdef news3400
	case NEWS3400:
		news3400_init();
		strcpy(cpu_model, idrom.id_machine);
		if (strcmp(cpu_model, "news3400") == 0 ||
		    strcmp(cpu_model, "news3200") == 0 ||
		    strcmp(cpu_model, "news3700") == 0) {
			/*
			 * Set up interrupt handling and I/O addresses.
			 */
			hardware_intr = news3400_intr;
			cpuspeed = 10;
		} else {
			printf("kernel not configured for machine %s\n",
			    cpu_model);
		}
		break;
#endif

#ifdef news5000
	case NEWS5000:
		news5000_init();
		strcpy(cpu_model, idrom.id_machine);
		if (strcmp(cpu_model, "news5000") == 0 ||
		    strcmp(cpu_model, "news5900") == 0) {
			/*
			 * Set up interrupt handling and I/O addresses.
			 */
			hardware_intr = news5000_intr;
			cpuspeed = 50;	/* ??? XXX */
		} else {
			printf("kernel not configured for machine %s\n",
			    cpu_model);
		}
		break;
#endif

	default:
		printf("kernel not configured for systype %d\n", systype);
		break;
	}
}
コード例 #9
0
ファイル: armish_machdep.c プロジェクト: ajinkya93/OpenBSD
/*
 * u_int initarm(...)
 *
 * Initial entry point on startup. This gets called before main() is
 * entered.
 * It should be responsible for setting up everything that must be
 * in place when main is called.
 * This includes
 *   Taking a copy of the boot configuration structure.
 *   Initialising the physical console so characters can be printed.
 *   Setting up page tables for the kernel
 *   Relocating the kernel to the bottom of physical memory
 */
u_int
initarm(void *arg0, void *arg1, void *arg2)
{
	extern vaddr_t xscale_cache_clean_addr;
	extern cpu_kcore_hdr_t cpu_kcore_hdr;
	int loop;
	int loop1;
	u_int l1pagetable;
	pv_addr_t kernel_l1pt;
	paddr_t memstart;
	psize_t memsize;
	extern u_int32_t esym;	/* &_end if no symbols are loaded */

#ifdef DIAGNOSTIC
	extern vsize_t xscale_minidata_clean_size; /* used in KASSERT */
#endif

	/* setup a serial console for very early boot */
	consinit();

	/*
	 * Heads up ... Setup the CPU / MMU / TLB functions
	 */
	if (set_cpufuncs())
		panic("cpu not recognized!");

	/*
	 * Examine the boot args string for options we need to know about
	 * now.
	 */
	/* XXX should really be done after setting up the console, but we
	 * XXX need to parse the console selection flags right now. */
	process_kernel_args((char *)0xa0200000 - MAX_BOOT_STRING - 1);

	/* Calibrate the delay loop. */
#if 1
	i80321_calibrate_delay();
#endif

	/* Talk to the user */
	printf("\nOpenBSD/armish booting ...\n");

	/*
	 * Reset the secondary PCI bus.  RedBoot doesn't stop devices
	 * on the PCI bus before handing us control, so we have to
	 * do this.
	 *
	 * XXX This is arguably a bug in RedBoot, and doing this reset
	 * XXX could be problematic in the future if we encounter an
	 * XXX application where the PPB in the i80312 is used as a
	 * XXX PPB.
	 */
//#define VERBOSE_INIT_ARM

	/*
	 * Fetch the SDRAM start/size from the i80312 SDRAM configuration
	 * registers.
	 */
	i80321_sdram_bounds(&obio_bs_tag, VERDE_PMMR_BASE + VERDE_MCU_BASE,
	    &memstart, &memsize);

#define DEBUG
#ifdef DEBUG
	printf("initarm: Configuring system ...\n");
#endif

	/* Fake bootconfig structure for the benefit of pmap.c */
	/* XXX must make the memory description h/w independant */
	bootconfig.dramblocks = 1;
	bootconfig.dram[0].address = memstart;
	bootconfig.dram[0].pages = memsize / PAGE_SIZE;

	/*
	 * Set up the variables that define the availablilty of
	 * physical memory.  For now, we're going to set
	 * physical_freestart to 0xa0200000 (where the kernel
	 * was loaded), and allocate the memory we need downwards.
	 * If we get too close to the page tables that RedBoot
	 * set up, we will panic.  We will update physical_freestart
	 * and physical_freeend later to reflect what pmap_bootstrap()
	 * wants to see.
	 *
	 * XXX pmap_bootstrap() needs an enema.
	 */
	physical_start = bootconfig.dram[0].address;
	physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE);

	physical_freestart = 0xa0009000UL;
	physical_freeend = 0xa0200000UL;

	physmem = (physical_end - physical_start) / PAGE_SIZE;

#ifdef DEBUG
	/* Tell the user about the memory */
	printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem,
	    physical_start, physical_end - 1);
#endif

	/*
	 * Okay, the kernel starts 2MB in from the bottom of physical
	 * memory.  We are going to allocate our bootstrap pages downwards
	 * from there.
	 *
	 * We need to allocate some fixed page tables to get the kernel
	 * going.  We allocate one page directory and a number of page
	 * tables and store the physical addresses in the kernel_pt_table
	 * array.
	 *
	 * The kernel page directory must be on a 16K boundary.  The page
	 * tables must be on 4K boundaries.  What we do is allocate the
	 * page directory on the first 16K boundary that we encounter, and
	 * the page tables on 4K boundaries otherwise.  Since we allocate
	 * at least 3 L2 page tables, we are guaranteed to encounter at
	 * least one 16K aligned region.
	 */

#ifdef VERBOSE_INIT_ARM
	printf("Allocating page tables\n");
#endif

	free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE;

#ifdef VERBOSE_INIT_ARM
	printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n",
	       physical_freestart, free_pages, free_pages);
#endif

	/* Define a macro to simplify memory allocation */
#define	valloc_pages(var, np)				\
	alloc_pages((var).pv_pa, (np));			\
	(var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start;

#define alloc_pages(var, np)				\
	physical_freeend -= ((np) * PAGE_SIZE);		\
	if (physical_freeend < physical_freestart)	\
		panic("initarm: out of memory");	\
	(var) = physical_freeend;			\
	free_pages -= (np);				\
	memset((char *)(var), 0, ((np) * PAGE_SIZE));

	loop1 = 0;
	kernel_l1pt.pv_pa = 0;
	for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) {
		/* Are we 16KB aligned for an L1 ? */
		if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0
		    && kernel_l1pt.pv_pa == 0) {
			valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE);
		} else {
			valloc_pages(kernel_pt_table[loop1],
			    L2_TABLE_SIZE / PAGE_SIZE);
			++loop1;
		}
	}

	/* This should never be able to happen but better confirm that. */
	if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0)
		panic("initarm: Failed to align the kernel page directory");

	/*
	 * Allocate a page for the system page mapped to V0x00000000
	 * This page will just contain the system vectors and can be
	 * shared by all processes.
	 */
	alloc_pages(systempage.pv_pa, 1);

	/* Allocate stacks for all modes */
	valloc_pages(irqstack, IRQ_STACK_SIZE);
	valloc_pages(abtstack, ABT_STACK_SIZE);
	valloc_pages(undstack, UND_STACK_SIZE);
	valloc_pages(kernelstack, UPAGES);

	/* Allocate enough pages for cleaning the Mini-Data cache. */
	KASSERT(xscale_minidata_clean_size <= PAGE_SIZE);
	valloc_pages(minidataclean, 1);

#ifdef VERBOSE_INIT_ARM
	printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa,
	    irqstack.pv_va); 
	printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa,
	    abtstack.pv_va); 
	printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa,
	    undstack.pv_va); 
	printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa,
	    kernelstack.pv_va); 
#endif

	/*
	 * XXX Defer this to later so that we can reclaim the memory
	 * XXX used by the RedBoot page tables.
	 */
	alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE);

	/*
	 * Ok we have allocated physical pages for the primary kernel
	 * page tables
	 */

#ifdef VERBOSE_INIT_ARM
	printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa);
#endif

	/*
	 * Now we start construction of the L1 page table
	 * We start by mapping the L2 page tables into the L1.
	 * This means that we can replace L1 mappings later on if necessary
	 */
	l1pagetable = kernel_l1pt.pv_pa;

#ifdef HIGH_VECT
	/* Map the L2 pages tables in the L1 page table */
	pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1),
	    &kernel_pt_table[KERNEL_PT_SYS]);
#else
	/* Map the L2 pages tables in the L1 page table */
	pmap_link_l2pt(l1pagetable, 0x00000000,
	    &kernel_pt_table[KERNEL_PT_SYS]);
#endif
	for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++)
		pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000,
		    &kernel_pt_table[KERNEL_PT_KERNEL + loop]);
	for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++)
		pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000,
		    &kernel_pt_table[KERNEL_PT_VMDATA + loop]);
#if 0
	pmap_link_l2pt(l1pagetable, IQ80321_IOPXS_VBASE,
	    &kernel_pt_table[KERNEL_PT_IOPXS]);
#endif

	/* update the top of the kernel VM */
	pmap_curmaxkvaddr =
	    KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000);

#ifdef VERBOSE_INIT_ARM
	printf("Mapping kernel\n");
#endif

	/* Now we fill in the L2 pagetable for the kernel static code/data
	 * and the symbol table. */
	{
		extern char etext[];
#ifdef VERBOSE_INIT_ARM
		extern char _end[];
#endif
		size_t textsize = (u_int32_t) etext - KERNEL_TEXT_BASE;
		size_t totalsize = esym - KERNEL_TEXT_BASE;
		u_int logical;

#ifdef VERBOSE_INIT_ARM
		printf("kernelsize text %x total %x end %xesym %x\n",
		    textsize, totalsize, _end, esym);
#endif

		textsize = round_page(textsize);
		totalsize = round_page(totalsize);
		
		logical = 0x00200000;	/* offset of kernel in RAM */

		/* Update dump information */
		cpu_kcore_hdr.kernelbase = KERNEL_BASE;
		cpu_kcore_hdr.kerneloffs = logical;
		cpu_kcore_hdr.staticsize = totalsize;

		logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical,
		    physical_start + logical, textsize,
		    PROT_READ | PROT_WRITE, PTE_CACHE);
		pmap_map_chunk(l1pagetable, KERNEL_BASE + logical,
		    physical_start + logical, totalsize - textsize,
		    PROT_READ | PROT_WRITE, PTE_CACHE);
	}

#ifdef VERBOSE_INIT_ARM
	printf("Constructing L2 page tables\n");
#endif

	/* Map the stack pages */
	pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa,
	    IRQ_STACK_SIZE * PAGE_SIZE, PROT_READ | PROT_WRITE, PTE_CACHE);
	pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa,
	    ABT_STACK_SIZE * PAGE_SIZE, PROT_READ | PROT_WRITE, PTE_CACHE);
	pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa,
	    UND_STACK_SIZE * PAGE_SIZE, PROT_READ | PROT_WRITE, PTE_CACHE);
	pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa,
	    UPAGES * PAGE_SIZE, PROT_READ | PROT_WRITE, PTE_CACHE);

	pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa,
	    L1_TABLE_SIZE, PROT_READ | PROT_WRITE, PTE_PAGETABLE);

	for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) {
		pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va,
		    kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE,
		    PROT_READ | PROT_WRITE, PTE_PAGETABLE);
	}

	/* Map the Mini-Data cache clean area. */
	xscale_setup_minidata(l1pagetable, minidataclean.pv_va,
	    minidataclean.pv_pa);

	/* Map the vector page. */
#ifdef HIGH_VECT
	pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa,
	    PROT_READ | PROT_WRITE, PTE_CACHE);
#else
        pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa,
	    PROT_READ | PROT_WRITE, PTE_CACHE);
#endif

	pmap_devmap_bootstrap(l1pagetable, iq80321_devmap);

	/*
	 * Give the XScale global cache clean code an appropriately
	 * sized chunk of unmapped VA space starting at 0xff000000
	 * (our device mappings end before this address).
	 */
	xscale_cache_clean_addr = 0xff000000U;

	/*
	 * Now we have the real page tables in place so we can switch to them.
	 * Once this is done we will be running with the REAL kernel page
	 * tables.
	 */

	/*
	 * Update the physical_freestart/physical_freeend/free_pages
	 * variables.
	 */
	{
		physical_freestart = physical_start - KERNEL_BASE +
		    round_page(esym);
		physical_freeend = physical_end;
		free_pages =
		    (physical_freeend - physical_freestart) / PAGE_SIZE;
	}
#ifdef VERBOSE_INIT_ARM
	printf("physical_freestart %x end %x\n", physical_freestart,
	    physical_freeend);
#endif

	/* be a client to all domains */
	cpu_domains(0x55555555);
	/* Switch tables */
#ifdef VERBOSE_INIT_ARM
	printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n",
	       physical_freestart, free_pages, free_pages);
	printf("switching to new L1 page table  @%#lx...", kernel_l1pt.pv_pa);
#endif


	cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT);
	setttb(kernel_l1pt.pv_pa);
	cpu_tlb_flushID();
	cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2));

	/*
	 * Moved from cpu_startup() as data_abort_handler() references
	 * this during uvm init
	 */
	proc0paddr = (struct user *)kernelstack.pv_va;
	proc0.p_addr = proc0paddr;

#ifdef VERBOSE_INIT_ARM
	printf("bootstrap done.\n");
#endif

#ifdef HIGH_VECT
	arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL);
#else
	arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL);
#endif

	/*
	 * Pages were allocated during the secondary bootstrap for the
	 * stacks for different CPU modes.
	 * We must now set the r13 registers in the different CPU modes to
	 * point to these stacks.
	 * Since the ARM stacks use STMFD etc. we must set r13 to the top end
	 * of the stack memory.
	 */
#ifdef VERBOSE_INIT_ARM
	printf("init subsystems: stacks ");
#endif

	set_stackptr(PSR_IRQ32_MODE,
	    irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE);
	set_stackptr(PSR_ABT32_MODE,
	    abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE);
	set_stackptr(PSR_UND32_MODE,
	    undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE);

	/*
	 * Well we should set a data abort handler.
	 * Once things get going this will change as we will need a proper
	 * handler.
	 * Until then we will use a handler that just panics but tells us
	 * why.
	 * Initialisation of the vectors will just panic on a data abort.
	 * This just fills in a slightly better one.
	 */
#ifdef VERBOSE_INIT_ARM
	printf("vectors ");
#endif
	data_abort_handler_address = (u_int)data_abort_handler;
	prefetch_abort_handler_address = (u_int)prefetch_abort_handler;
	undefined_handler_address = (u_int)undefinedinstruction_bounce;

	/* Initialise the undefined instruction handlers */
#ifdef VERBOSE_INIT_ARM
	printf("undefined ");
#endif
	undefined_init();

	/* Load memory into UVM. */
#ifdef VERBOSE_INIT_ARM
	printf("page ");
#endif
	uvm_setpagesize();	/* initialize PAGE_SIZE-dependent variables */
	uvm_page_physload(atop(physical_freestart), atop(physical_freeend),
	    atop(physical_freestart), atop(physical_freeend), 0);

	/* Boot strap pmap telling it where the kernel page table is */
#ifdef VERBOSE_INIT_ARM
	printf("pmap ");
#endif
	pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, KERNEL_VM_BASE,
	    KERNEL_VM_BASE + KERNEL_VM_SIZE);

	/* Update dump information */
	cpu_kcore_hdr.pmap_kernel_l1 = (u_int32_t)pmap_kernel()->pm_l1;
	cpu_kcore_hdr.pmap_kernel_l2 = (u_int32_t)&(pmap_kernel()->pm_l2);

	/* Setup the IRQ system */
#ifdef VERBOSE_INIT_ARM
	printf("irq ");
#endif
	i80321intc_intr_init();

#ifdef VERBOSE_INIT_ARM
	printf("done.\n");
#endif

#ifdef DDB
	db_machine_init();

	/* Firmware doesn't load symbols. */
	ddb_init();

	if (boothowto & RB_KDB)
		Debugger();
#endif
    
	/* We return the new stack pointer address */
	return(kernelstack.pv_va + USPACE_SVC_STACK_TOP);
}
コード例 #10
0
/*
 * u_int initarm(...)
 *
 * Initial entry point on startup. This gets called before main() is
 * entered.
 * It should be responsible for setting up everything that must be
 * in place when main is called.
 * This includes
 *   Taking a copy of the boot configuration structure.
 *   Initialising the physical console so characters can be printed.
 *   Setting up page tables for the kernel
 *   Initialising interrupt controllers to a sane default state
 */
u_int
initarm(void *arg)
{
	int loop;
	int loop1;
	u_int l1pagetable;
	struct bootparam_tag *bootparam_p;
	unsigned long devcfg;

	/*
	 * Since we map the on-board devices VA==PA, and the kernel
	 * is running VA==PA, it's possible for us to initialize
	 * the console now.
	 */
	consinit();

	/* identify model */
	devcfg = *((volatile unsigned long*)(EP93XX_APB_HWBASE 
					     + EP93XX_APB_SYSCON
					     + EP93XX_SYSCON_DeviceCfg));
	for (armadillo_model = &armadillo_model_table[0];
				armadillo_model->devcfg; armadillo_model++)
		if (devcfg == armadillo_model->devcfg)
			break;

	/* Talk to the user */
	printf("\nNetBSD/%s booting ...\n", armadillo_model->name);

	/* set some informations from bootloader */
	bootparam_p = (struct bootparam_tag *)bootparam;
	bootconfig.dramblocks = 0;
	while (bootparam_p->hdr.tag != BOOTPARAM_TAG_NONE) {
		switch (bootparam_p->hdr.tag) {
		case BOOTPARAM_TAG_MEM:
			if (bootconfig.dramblocks < DRAM_BLOCKS) {
#ifdef VERBOSE_INIT_ARM
			printf("dram[%d]: address=0x%08lx, size=0x%08lx\n",
						bootconfig.dramblocks,
						bootparam_p->u.mem.start,
						bootparam_p->u.mem.size);
#endif
				bootconfig.dram[bootconfig.dramblocks].address =
					bootparam_p->u.mem.start;
				bootconfig.dram[bootconfig.dramblocks].pages =
					bootparam_p->u.mem.size / PAGE_SIZE;
				bootconfig.dramblocks++;
			}
			break;
		case BOOTPARAM_TAG_CMDLINE:
#ifdef VERBOSE_INIT_ARM
			printf("cmdline: %s\n", bootparam_p->u.cmdline.cmdline);
#endif
			parse_mi_bootargs(bootparam_p->u.cmdline.cmdline);
			break;
		}
		bootparam_p = bootparam_tag_next(bootparam_p);
	}

	/*
	 * Heads up ... Setup the CPU / MMU / TLB functions
	 */
	if (set_cpufuncs())
		panic("cpu not recognized!");

#ifdef VERBOSE_INIT_ARM
	printf("initarm: Configuring system ...\n");
#endif
	/*
	 * Set up the variables that define the availablilty of
	 * physical memory.  For now, we're going to set
	 * physical_freestart to 0xc0200000 (where the kernel
	 * was loaded), and allocate the memory we need downwards.
	 * If we get too close to the L1 table that we set up, we
	 * will panic.  We will update physical_freestart and
	 * physical_freeend later to reflect what pmap_bootstrap()
	 * wants to see.
	 *
	 * XXX pmap_bootstrap() needs an enema.
	 */
	physical_start = bootconfig.dram[0].address;
	physical_end = bootconfig.dram[0].address
			+ (bootconfig.dram[0].pages * PAGE_SIZE);

	physical_freestart = 0xc0018000UL;
	physical_freeend = 0xc0200000UL;

	physmem = (physical_end - physical_start) / PAGE_SIZE;

#ifdef VERBOSE_INIT_ARM
	/* Tell the user about the memory */
	printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem,
	    physical_start, physical_end - 1);
#endif

	/*
	 * Okay, the kernel starts 2MB in from the bottom of physical
	 * memory.  We are going to allocate our bootstrap pages downwards
	 * from there.
	 *
	 * We need to allocate some fixed page tables to get the kernel
	 * going.  We allocate one page directory and a number of page
	 * tables and store the physical addresses in the kernel_pt_table
	 * array.
	 *
	 * The kernel page directory must be on a 16K boundary.  The page
	 * tables must be on 4K bounaries.  What we do is allocate the
	 * page directory on the first 16K boundary that we encounter, and
	 * the page tables on 4K boundaries otherwise.  Since we allocate
	 * at least 3 L2 page tables, we are guaranteed to encounter at
	 * least one 16K aligned region.
	 */

#ifdef VERBOSE_INIT_ARM
	printf("Allocating page tables\n");
#endif

	free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE;

#ifdef VERBOSE_INIT_ARM
	printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n",
	       physical_freestart, free_pages, free_pages);
#endif

	/* Define a macro to simplify memory allocation */
#define	valloc_pages(var, np)				\
	alloc_pages((var).pv_pa, (np));			\
	(var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start;

#define alloc_pages(var, np)				\
	physical_freeend -= ((np) * PAGE_SIZE);		\
	if (physical_freeend < physical_freestart)	\
		panic("initarm: out of memory");	\
	(var) = physical_freeend;			\
	free_pages -= (np);				\
	memset((char *)(var), 0, ((np) * PAGE_SIZE));

	loop1 = 0;
	for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) {
		/* Are we 16KB aligned for an L1 ? */
		if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0
		    && kernel_l1pt.pv_pa == 0) {
			valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE);
		} else {
			valloc_pages(kernel_pt_table[loop1],
			    L2_TABLE_SIZE / PAGE_SIZE);
			++loop1;
		}
	}

	/* This should never be able to happen but better confirm that. */
	if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0)
		panic("initarm: Failed to align the kernel page directory");

	/*
	 * Allocate a page for the system vectors page
	 */
	alloc_pages(systempage.pv_pa, 1);

	/* Allocate stacks for all modes */
	valloc_pages(irqstack, IRQ_STACK_SIZE);
	valloc_pages(abtstack, ABT_STACK_SIZE);
	valloc_pages(undstack, UND_STACK_SIZE);
	valloc_pages(kernelstack, UPAGES);

#ifdef VERBOSE_INIT_ARM
	printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa,
	    irqstack.pv_va); 
	printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa,
	    abtstack.pv_va); 
	printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa,
	    undstack.pv_va); 
	printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa,
	    kernelstack.pv_va); 
#endif

	alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE);

	/*
	 * Ok we have allocated physical pages for the primary kernel
	 * page tables.  Save physical_freeend for when we give whats left 
	 * of memory below 2Mbyte to UVM.
	 */

	physical_freeend_low = physical_freeend;

#ifdef VERBOSE_INIT_ARM
	printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa);
#endif

	/*
	 * Now we start construction of the L1 page table
	 * We start by mapping the L2 page tables into the L1.
	 * This means that we can replace L1 mappings later on if necessary
	 */
	l1pagetable = kernel_l1pt.pv_pa;

	/* Map the L2 pages tables in the L1 page table */
	pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1),
	    &kernel_pt_table[KERNEL_PT_SYS]);
	for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++)
		pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000,
		    &kernel_pt_table[KERNEL_PT_KERNEL + loop]);
	for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++)
		pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000,
		    &kernel_pt_table[KERNEL_PT_VMDATA + loop]);

	/* update the top of the kernel VM */
	pmap_curmaxkvaddr =
	    KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000);

#ifdef VERBOSE_INIT_ARM
	printf("Mapping kernel\n");
#endif

	/* Now we fill in the L2 pagetable for the kernel static code/data */
	{
		extern char etext[], _end[];
		size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE;
		size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE;
		u_int logical;

		textsize = (textsize + PGOFSET) & ~PGOFSET;
		totalsize = (totalsize + PGOFSET) & ~PGOFSET;

		logical = 0x00200000;	/* offset of kernel in RAM */
		logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical,
		    physical_start + logical, textsize,
		    VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
		logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical,
		    physical_start + logical, totalsize - textsize,
		    VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
	}

#ifdef VERBOSE_INIT_ARM
	printf("Constructing L2 page tables\n");
#endif

	/* Map the stack pages */
	pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa,
	    IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
	pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa,
	    ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
	pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa,
	    UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
	pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa,
	    UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);

	pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa,
	    L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);

	for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) {
		pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va,
		    kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE,
		    VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
	}

	/* Map the vector page. */
	pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa,
	    VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);

	/* Map the statically mapped devices. */
	pmap_devmap_bootstrap(l1pagetable, armadillo9_devmap);

	/*
	 * Update the physical_freestart/physical_freeend/free_pages
	 * variables.
	 */
	{
		extern char _end[];

		physical_freestart = physical_start +
		    (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) -
		     KERNEL_BASE);
		physical_freeend = physical_end;
		free_pages =
		    (physical_freeend - physical_freestart) / PAGE_SIZE;
	}

	/*
	 * Now we have the real page tables in place so we can switch to them.
	 * Once this is done we will be running with the REAL kernel page
	 * tables.
	 */

	/* Switch tables */
#ifdef VERBOSE_INIT_ARM
	printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n",
	       physical_freestart, free_pages, free_pages);
	printf("switching to new L1 page table  @%#lx...", kernel_l1pt.pv_pa);
#endif
	cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT);
	cpu_setttb(kernel_l1pt.pv_pa, true);
	cpu_tlb_flushID();
	cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2));

	/*
	 * Moved from cpu_startup() as data_abort_handler() references
	 * this during uvm init
	 */
	uvm_lwp_setuarea(&lwp0, kernelstack.pv_va);

#ifdef VERBOSE_INIT_ARM
	printf("done!\n");
#endif

#ifdef VERBOSE_INIT_ARM
	printf("bootstrap done.\n");
#endif

	arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL);

	/*
	 * Pages were allocated during the secondary bootstrap for the
	 * stacks for different CPU modes.
	 * We must now set the r13 registers in the different CPU modes to
	 * point to these stacks.
	 * Since the ARM stacks use STMFD etc. we must set r13 to the top end
	 * of the stack memory.
	 */
#ifdef VERBOSE_INIT_ARM
	printf("init subsystems: stacks ");
#endif

	set_stackptr(PSR_IRQ32_MODE,
	    irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE);
	set_stackptr(PSR_ABT32_MODE,
	    abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE);
	set_stackptr(PSR_UND32_MODE,
	    undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE);

	/*
	 * Well we should set a data abort handler.
	 * Once things get going this will change as we will need a proper
	 * handler.
	 * Until then we will use a handler that just panics but tells us
	 * why.
	 * Initialisation of the vectors will just panic on a data abort.
	 * This just fills in a slightly better one.
	 */
#ifdef VERBOSE_INIT_ARM
	printf("vectors ");
#endif
	data_abort_handler_address = (u_int)data_abort_handler;
	prefetch_abort_handler_address = (u_int)prefetch_abort_handler;
	undefined_handler_address = (u_int)undefinedinstruction_bounce;

	/* Initialise the undefined instruction handlers */
#ifdef VERBOSE_INIT_ARM
	printf("undefined ");
#endif
	undefined_init();

	/* Load memory into UVM. */
#ifdef VERBOSE_INIT_ARM
	printf("page ");
#endif
	uvm_setpagesize();	/* initialize PAGE_SIZE-dependent variables */
	uvm_page_physload(atop(physical_freestart), atop(physical_freeend),
	    atop(physical_freestart), atop(physical_freeend),
	    VM_FREELIST_DEFAULT);
	uvm_page_physload(atop(0xc0000000), atop(physical_freeend_low),
	    atop(0xc0000000), atop(physical_freeend_low),
	    VM_FREELIST_DEFAULT);
	physmem = bootconfig.dram[0].pages;
	for (loop = 1; loop < bootconfig.dramblocks; ++loop) {
		size_t start = bootconfig.dram[loop].address;
		size_t size = bootconfig.dram[loop].pages * PAGE_SIZE;
		uvm_page_physload(atop(start), atop(start + size),
				  atop(start), atop(start + size),
				  VM_FREELIST_DEFAULT);
		physmem += bootconfig.dram[loop].pages;
	}

	/* Boot strap pmap telling it where the kernel page table is */
#ifdef VERBOSE_INIT_ARM
	printf("pmap ");
#endif
	pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE);

	/* Setup the IRQ system */
#ifdef VERBOSE_INIT_ARM
	printf("irq ");
#endif
	ep93xx_intr_init();
#if NISA > 0
	isa_intr_init();

#ifdef VERBOSE_INIT_ARM
	printf("isa ");
#endif
	isa_armadillo9_init(ARMADILLO9_IO16_VBASE + ARMADILLO9_ISAIO,
		ARMADILLO9_IO16_VBASE + ARMADILLO9_ISAMEM);	
#endif

#ifdef VERBOSE_INIT_ARM
	printf("done.\n");
#endif

#ifdef BOOTHOWTO
	boothowto = BOOTHOWTO;
#endif

#ifdef DDB
	db_machine_init();
	if (boothowto & RB_KDB)
		Debugger();
#endif

	/* We have our own device_register() */
	evbarm_device_register = armadillo9_device_register;

	/* We return the new stack pointer address */
	return(kernelstack.pv_va + USPACE_SVC_STACK_TOP);
}
コード例 #11
0
u_int
at91bus_setup(BootConfig *mem)
{
	int loop;
	int loop1;
	u_int l1pagetable;

	consinit();

#ifdef	VERBOSE_INIT_ARM
	printf("\nNetBSD/AT91 booting ...\n");
#endif

	// setup the CPU / MMU / TLB functions:
	if (set_cpufuncs())
		panic("%s: cpu not recognized", __FUNCTION__);

#ifdef	VERBOSE_INIT_ARM
	printf("%s: configuring system...\n", __FUNCTION__);
#endif

	/*
	 * Setup the variables that define the availability of
	 * physical memory.
	 */
	physical_start = mem->dram[0].address;
	physical_end = mem->dram[0].address + mem->dram[0].pages * PAGE_SIZE;

	physical_freestart = mem->dram[0].address + 0x9000ULL;
	physical_freeend = KERNEL_BASE_PHYS;
	physmem = (physical_end - physical_start) / PAGE_SIZE;

#ifdef	VERBOSE_INIT_ARM
	printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem,
	       physical_start, physical_end - 1);
#endif

	free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE;

#ifdef	VERBOSE_INIT_ARM
	printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n",
	       physical_freestart, free_pages, free_pages);
#endif
	/* Define a macro to simplify memory allocation */
#define	valloc_pages(var, np)				\
	alloc_pages((var).pv_pa, (np));			\
	(var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start;

#define alloc_pages(var, np)				\
	physical_freeend -= ((np) * PAGE_SIZE);		\
	if (physical_freeend < physical_freestart)	\
		panic("initarm: out of memory");	\
	(var) = physical_freeend;			\
	free_pages -= (np);				\
	memset((char *)(var), 0, ((np) * PAGE_SIZE));

	loop1 = 0;
	for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) {
		/* Are we 16KB aligned for an L1 ? */
		if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0
		    && kernel_l1pt.pv_pa == 0) {
			valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE);
		} else {
			valloc_pages(kernel_pt_table[loop1],
			    L2_TABLE_SIZE / PAGE_SIZE);
			++loop1;
		}
	}

	/* This should never be able to happen but better confirm that. */
	if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0)
		panic("initarm: Failed to align the kernel page directory");

	/*
	 * Allocate a page for the system vectors page
	 */
	valloc_pages(systempage, 1);
	systempage.pv_va = 0x00000000;

	/* Allocate stacks for all modes */
	valloc_pages(irqstack, IRQ_STACK_SIZE);
	valloc_pages(abtstack, ABT_STACK_SIZE);
	valloc_pages(undstack, UND_STACK_SIZE);
	valloc_pages(kernelstack, UPAGES);

#ifdef VERBOSE_INIT_ARM
	printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa,
	    irqstack.pv_va); 
	printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa,
	    abtstack.pv_va); 
	printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa,
	    undstack.pv_va); 
	printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa,
	    kernelstack.pv_va); 
#endif

	alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE);

	/*
	 * Ok we have allocated physical pages for the primary kernel
	 * page tables.  Save physical_freeend for when we give whats left 
	 * of memory below 2Mbyte to UVM.
	 */

	physical_freeend_low = physical_freeend;

#ifdef VERBOSE_INIT_ARM
	printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa);
#endif

	/*
	 * Now we start construction of the L1 page table
	 * We start by mapping the L2 page tables into the L1.
	 * This means that we can replace L1 mappings later on if necessary
	 */
	l1pagetable = kernel_l1pt.pv_pa;

	/* Map the L2 pages tables in the L1 page table */
	pmap_link_l2pt(l1pagetable, 0x00000000, &kernel_pt_table[KERNEL_PT_SYS]);
	for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++)
		pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000,
		    &kernel_pt_table[KERNEL_PT_KERNEL + loop]);
	for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++)
		pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000,
		    &kernel_pt_table[KERNEL_PT_VMDATA + loop]);

	/* update the top of the kernel VM */
	pmap_curmaxkvaddr =
	    KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000);

#ifdef VERBOSE_INIT_ARM
	printf("Mapping kernel\n");
#endif

	/* Now we fill in the L2 pagetable for the kernel static code/data */
	{
		extern char etext[], _end[];
		size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE;
		size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE;
		u_int logical;

		textsize = (textsize + PGOFSET) & ~PGOFSET;
		totalsize = (totalsize + PGOFSET) & ~PGOFSET;

		logical = KERNEL_BASE_PHYS - mem->dram[0].address;	/* offset of kernel in RAM */
		logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical,
		    physical_start + logical, textsize,
		    VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
		logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical,
		    physical_start + logical, totalsize - textsize,
		    VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
	}

#ifdef VERBOSE_INIT_ARM
	printf("Constructing L2 page tables\n");
#endif

	/* Map the stack pages */
	pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa,
	    IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
	pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa,
	    ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
	pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa,
	    UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
	pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa,
	    UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);

	pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa,
	    L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);

	for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) {
		pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va,
		    kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE,
		    VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
	}

	/* Map the vector page. */
	pmap_map_entry(l1pagetable, ARM_VECTORS_LOW, systempage.pv_pa,
		       VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);

	/* Map the statically mapped devices. */
	pmap_devmap_bootstrap(l1pagetable, at91_devmap());

	/*
	 * Update the physical_freestart/physical_freeend/free_pages
	 * variables.
	 */
	{
		extern char _end[];

		physical_freestart = physical_start +
		    (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) -
		     KERNEL_BASE);
		physical_freeend = physical_end;
		free_pages =
		    (physical_freeend - physical_freestart) / PAGE_SIZE;
	}

	/*
	 * Now we have the real page tables in place so we can switch to them.
	 * Once this is done we will be running with the REAL kernel page
	 * tables.
	 */

	/* Switch tables */
#ifdef VERBOSE_INIT_ARM
	printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n",
	       physical_freestart, free_pages, free_pages);
	printf("switching to new L1 page table  @%#lx...", kernel_l1pt.pv_pa);
#endif
	cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT);
	cpu_setttb(kernel_l1pt.pv_pa, true);
	cpu_tlb_flushID();
	cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2));

	/*
	 * Moved from cpu_startup() as data_abort_handler() references
	 * this during uvm init
	 */
	uvm_lwp_setuarea(&lwp0, kernelstack.pv_va);

#ifdef VERBOSE_INIT_ARM
	printf("done!\n");
#endif

#ifdef VERBOSE_INIT_ARM
	printf("bootstrap done.\n");
#endif

	/* @@@@ check this out: @@@ */
	arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL);

	/*
	 * Pages were allocated during the secondary bootstrap for the
	 * stacks for different CPU modes.
	 * We must now set the r13 registers in the different CPU modes to
	 * point to these stacks.
	 * Since the ARM stacks use STMFD etc. we must set r13 to the top end
	 * of the stack memory.
	 */
#ifdef VERBOSE_INIT_ARM
	printf("init subsystems: stacks ");
#endif

	set_stackptr(PSR_IRQ32_MODE,
	    irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE);
	set_stackptr(PSR_ABT32_MODE,
	    abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE);
	set_stackptr(PSR_UND32_MODE,
	    undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE);

	/*
	 * Well we should set a data abort handler.
	 * Once things get going this will change as we will need a proper
	 * handler.
	 * Until then we will use a handler that just panics but tells us
	 * why.
	 * Initialisation of the vectors will just panic on a data abort.
	 * This just fills in a slightly better one.
	 */
#ifdef VERBOSE_INIT_ARM
	printf("vectors ");
#endif
	data_abort_handler_address = (u_int)data_abort_handler;
	prefetch_abort_handler_address = (u_int)prefetch_abort_handler;
	undefined_handler_address = (u_int)undefinedinstruction_bounce;

	/* Initialise the undefined instruction handlers */
#ifdef VERBOSE_INIT_ARM
	printf("undefined ");
#endif
	undefined_init();

	/* Load memory into UVM. */
#ifdef VERBOSE_INIT_ARM
	printf("page ");
#endif
	uvm_setpagesize();	/* initialize PAGE_SIZE-dependent variables */
	uvm_page_physload(atop(physical_freestart), atop(physical_freeend),
	    atop(physical_freestart), atop(physical_freeend),
	    VM_FREELIST_DEFAULT);
	uvm_page_physload(atop(physical_start), atop(physical_freeend_low),
	    atop(physical_start), atop(physical_freeend_low),
	    VM_FREELIST_DEFAULT);

	/* Boot strap pmap telling it where the kernel page table is */
#ifdef VERBOSE_INIT_ARM
	printf("pmap ");
#endif
	pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE);

	/* Setup the IRQ system */
#ifdef VERBOSE_INIT_ARM
	printf("irq ");
#endif
	at91_intr_init();

#ifdef VERBOSE_INIT_ARM
	printf("done.\n");
#endif

#ifdef BOOTHOWTO
	boothowto = BOOTHOWTO;
#endif
	boothowto = AB_VERBOSE | AB_DEBUG; // @@@@

#ifdef IPKDB
	/* Initialise ipkdb */
	ipkdb_init();
	if (boothowto & RB_KDB)
		ipkdb_connect(0);
#endif

#ifdef DDB
	db_machine_init();
	if (boothowto & RB_KDB)
		Debugger();
#endif
#if 0
	printf("test data abort...\n");
	*((volatile uint32_t*)(0x1234567F)) = 0xdeadbeef;
#endif

#ifdef VERBOSE_INIT_ARM
  	printf("%s: returning new stack pointer 0x%lX\n", __FUNCTION__, (kernelstack.pv_va + USPACE_SVC_STACK_TOP));
#endif

	/* We return the new stack pointer address */
	return(kernelstack.pv_va + USPACE_SVC_STACK_TOP);
}
コード例 #12
0
ファイル: machdep.c プロジェクト: MarginC/kame
/*
 * Do all the stuff that locore normally does before calling main().
 */
void
mach_init()
{
	extern char kernel_text[], edata[], end[];
	extern struct user *proc0paddr;
	caddr_t kernend, v;
	paddr_t start;
	size_t size;

	/*
	 * Clear the BSS segment.
	 */
	kernend = (caddr_t)mips_round_page(end);
	memset(edata, 0, kernend - edata);

	/* disable all interrupt */
	interrupt_init_bootstrap();

	/* enable SIF BIOS */
	sifbios_init();

	consinit();

	printf("kernel_text=%p edata=%p end=%p\n", kernel_text, edata, end);

#ifdef DEBUG
	bootinfo_dump();
#endif
	uvm_setpagesize();
	physmem = atop(PS2_MEMORY_SIZE);

	/*
	 * Copy exception-dispatch code down to exception vector.
	 * Initialize locore-function vector.
	 * Clear out the I and D caches.
	 */
	mips_vector_init();

	/*
	 * Load the rest of the available pages into the VM system.
	 */
	start = (paddr_t)round_page(MIPS_KSEG0_TO_PHYS(kernend));
	size = PS2_MEMORY_SIZE - start - BOOTINFO_BLOCK_SIZE;
	memset((void *)MIPS_PHYS_TO_KSEG1(start), 0, size);
	    
	/* kernel itself */
	mem_clusters[0].start = trunc_page(MIPS_KSEG0_TO_PHYS(kernel_text));
	mem_clusters[0].size = start - mem_clusters[0].start;
	/* heap */
	mem_clusters[1].start = start;
	mem_clusters[1].size = size;
	/* load */
	printf("load memory %#lx, %#x\n", start, size);
	uvm_page_physload(atop(start), atop(start + size),
	    atop(start), atop(start + size), VM_FREELIST_DEFAULT);

	/*
	 * Initialize error message buffer (at end of core).
	 */
	mips_init_msgbuf();

	/*
	 * Compute the size of system data structures.  pmap_bootstrap()
	 * needs some of this information.
	 */
	size = (vsize_t)allocsys(NULL, NULL);

	pmap_bootstrap();

	/*
	 * Allocate space for proc0's USPACE.
	 */
	v = (caddr_t)uvm_pageboot_alloc(USPACE); 
	proc0.p_addr = proc0paddr = (struct user *)v;
	proc0.p_md.md_regs = (struct frame *)(v + USPACE) - 1;
	curpcb = &proc0.p_addr->u_pcb;
	curpcb->pcb_context[11] = PSL_LOWIPL;	/* SR */
#ifdef IPL_ICU_MASK
	curpcb->pcb_ppl = 0;
#endif

	/*
	 * Allocate space for system data structures.  These data structures
	 * are allocated here instead of cpu_startup() because physical
	 * memory is directly addressable.  We don't have to map these into
	 * virtual address space.
	 */
	v = (caddr_t)uvm_pageboot_alloc(size); 
	if ((allocsys(v, NULL) - v) != size)
		panic("mach_init: table size inconsistency");
}
コード例 #13
0
/*
 * Early initialization, before main() is called.
 */
void
luna68k_init(void)
{
	volatile uint8_t *pio0 = (void *)0x49000000;
	int sw1, i;
	char *cp;
	extern char bootarg[64];

	extern paddr_t avail_start, avail_end;

	/* initialize cn_tab for early console */
#if 1
	cn_tab = &syscons;
#else
	cn_tab = &romcons;
#endif

	/*
	 * Tell the VM system about available physical memory.  The
	 * luna68k only has one segment.
	 */
	uvm_page_physload(atop(avail_start), atop(avail_end),
	    atop(avail_start), atop(avail_end), VM_FREELIST_DEFAULT);

	/*
	 * Initialize error message buffer (at end of core).
	 * avail_end was pre-decremented in pmap_bootstrap to compensate.
	 */
	for (i = 0; i < btoc(MSGBUFSIZE); i++)
		pmap_kenter_pa((vaddr_t)msgbufaddr + i * PAGE_SIZE,
		    avail_end + i * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, 0);
	pmap_update(pmap_kernel());
	initmsgbuf(msgbufaddr, m68k_round_page(MSGBUFSIZE));


	pio0[3] = 0xb6;
	pio0[2] = 1 << 6;		/* enable parity check */
	pio0[3] = 0xb6;
	sw1 = pio0[0];			/* dip sw1 value */
	sw1 ^= 0xff;
	sysconsole = !(sw1 & 0x2);	/* console selection */

	/*
	 * Check if boothowto and bootdev values are passed by our bootloader.
	 */
	if ((bootdev & B_MAGICMASK) == B_DEVMAGIC) {
		/* Valid value is set; no need to parse bootarg. */
		return;
	}

	/*
	 * No valid bootdev value is set.
	 * Assume we are booted by ROM monitor directly using a.out kernel
	 * and we have to parse bootarg passed from the monitor to set
	 * proper boothowto and check netboot.
	 */

	/* set default to "sd0a" with no howto flags */
	bootdev = MAKEBOOTDEV(0, LUNA68K_BOOTADPT_SPC, 0, 0, 0);
	boothowto = 0;

	/*
	 * 'bootarg' on LUNA has:
	 *   "<args of x command> ENADDR=<addr> HOST=<host> SERVER=<name>"
	 * where <addr> is MAC address of which network loader used (not
	 * necessarily same as one at 0x4101.FFE0), <host> and <name>
	 * are the values of HOST and SERVER environment variables.
	 *
	 * 'bootarg' on LUNA-II has "<args of x command>" only.
	 *
	 * NetBSD/luna68k cares only the first argment; any of "sda".
	 */
	bootarg[63] = '\0';
	for (cp = bootarg; *cp != '\0'; cp++) {
		if (*cp == '-') {
			char c;
			while ((c = *cp) != '\0' && c != ' ') {
				BOOT_FLAG(c, boothowto);
				cp++;
			}
		} else if (*cp == 'E' && memcmp("ENADDR=", cp, 7) == 0) {
			bootdev =
			    MAKEBOOTDEV(0, LUNA68K_BOOTADPT_LANCE, 0, 0, 0);
		}
	}
}
コード例 #14
0
ファイル: machdep.c プロジェクト: lacombar/netbsd-alc
/*
 * Early initialization, right before main is called.
 */
void
mvme68k_init(void)
{
	int i;

	/*
	 * Since mvme68k boards can have anything from 4MB of onboard RAM, we
	 * would rather set the pager_map_size at runtime based on the amount
	 * of onboard RAM.
	 *
	 * Set pager_map_size to half the size of onboard RAM, up to a
	 * maximum of 16MB.
	 * (Note: Just use ps_end here since onboard RAM starts at 0x0)
	 */
	pager_map_size = phys_seg_list[0].ps_end / 2;
	if (pager_map_size > (16 * 1024 * 1024))
		pager_map_size = 16 * 1024 * 1024;

	/*
	 * Tell the VM system about available physical memory.
	 */
	for (i = 0; i < mem_cluster_cnt; i++) {
		if (phys_seg_list[i].ps_start == phys_seg_list[i].ps_end) {
			/*
			 * Segment has been completely gobbled up.
			 */
			continue;
		}
		/*
		 * Note the index of the mem cluster is the free
		 * list we want to put the memory on (0 == default,
		 * 1 == VME).  There can only be two.
		 */
		uvm_page_physload(atop(phys_seg_list[i].ps_start),
				 atop(phys_seg_list[i].ps_end),
				 atop(phys_seg_list[i].ps_start),
				 atop(phys_seg_list[i].ps_end), i);
	}

	switch (machineid) {
#ifdef MVME147
	case MVME_147:
		mvme147_init();
		break;
#endif
#ifdef MVME167
	case MVME_167:
#endif
#ifdef MVME162
	case MVME_162:
#endif
#ifdef MVME177
	case MVME_177:
#endif
#ifdef MVME172
	case MVME_172:
#endif
#if defined(MVME162) || defined(MVME167) || defined(MVME172) || defined(MVME177)
		mvme1xx_init();
		break;
#endif
	default:
		panic("%s: impossible machineid", __func__);
	}

	/*
	 * Initialize error message buffer (at end of core).
	 */
	for (i = 0; i < btoc(round_page(MSGBUFSIZE)); i++)
		pmap_enter(pmap_kernel(), (vaddr_t)msgbufaddr + i * PAGE_SIZE,
		    msgbufpa + i * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE,
		    VM_PROT_READ|VM_PROT_WRITE|PMAP_WIRED);
	initmsgbuf(msgbufaddr, round_page(MSGBUFSIZE));
	pmap_update(pmap_kernel());
}
コード例 #15
0
/*
 * It should be responsible for setting up everything that must be
 * in place when main is called.
 * This includes:
 *   Initializing the physical console so characters can be printed.
 *   Setting up page tables for the kernel.
 */
u_int
init_sa11x0(int argc, char **argv, struct bootinfo *bi)
{
	u_int kerneldatasize, symbolsize;
	u_int l1pagetable;
	vaddr_t freemempos;
	vsize_t pt_size;
	int loop;
#if NKSYMS || defined(DDB) || defined(MODULAR)
	Elf_Shdr *sh;
#endif

#ifdef DEBUG_BEFOREMMU
	/*
	 * At this point, we cannot call real consinit().
	 * Just call a faked up version of consinit(), which does the thing
	 * with MMU disabled.
	 */
	fakecninit();
#endif

	/*
	 * XXX for now, overwrite bootconfig to hardcoded values.
	 * XXX kill bootconfig and directly call uvm_physload
	 */
	bootconfig.dram[0].address = 0xc0000000;
	bootconfig.dram[0].pages = DRAM_PAGES;
	bootconfig.dramblocks = 1;

	kerneldatasize = (uint32_t)&end - (uint32_t)KERNEL_TEXT_BASE;
	symbolsize = 0;
#if NKSYMS || defined(DDB) || defined(MODULAR)
	if (!memcmp(&end, "\177ELF", 4)) {
		sh = (Elf_Shdr *)((char *)&end + ((Elf_Ehdr *)&end)->e_shoff);
		loop = ((Elf_Ehdr *)&end)->e_shnum;
		for (; loop; loop--, sh++)
			if (sh->sh_offset > 0 &&
			    (sh->sh_offset + sh->sh_size) > symbolsize)
				symbolsize = sh->sh_offset + sh->sh_size;
	}
#endif

	printf("kernsize=0x%x\n", kerneldatasize);
	kerneldatasize += symbolsize;
	kerneldatasize = ((kerneldatasize - 1) & ~(PAGE_SIZE * 4 - 1)) +
	    PAGE_SIZE * 8;

	/*
	 * hpcboot has loaded me with MMU disabled.
	 * So create kernel page tables and enable MMU.
	 */

	/*
	 * Set up the variables that define the availability of physcial
	 * memory.
	 */
	physical_start = bootconfig.dram[0].address;
	physical_freestart = physical_start
	    + (KERNEL_TEXT_BASE - KERNEL_BASE) + kerneldatasize;
	physical_end = bootconfig.dram[bootconfig.dramblocks - 1].address
	    + bootconfig.dram[bootconfig.dramblocks - 1].pages * PAGE_SIZE;
	physical_freeend = physical_end;
    
	for (loop = 0; loop < bootconfig.dramblocks; ++loop)
		physmem += bootconfig.dram[loop].pages;
    
	/* XXX handle UMA framebuffer memory */

	/* Use the first 256kB to allocate things */
	freemempos = KERNEL_BASE;
	memset((void *)KERNEL_BASE, 0, KERNEL_TEXT_BASE - KERNEL_BASE);

	/*
	 * Right. We have the bottom meg of memory mapped to 0x00000000
	 * so was can get at it. The kernel will occupy the start of it.
	 * After the kernel/args we allocate some of the fixed page tables
	 * we need to get the system going.
	 * We allocate one page directory and NUM_KERNEL_PTS page tables
	 * and store the physical addresses in the kernel_pt_table array.
	 * Must remember that neither the page L1 or L2 page tables are the
	 * same size as a page !
	 *
	 * Ok, the next bit of physical allocate may look complex but it is
	 * simple really. I have done it like this so that no memory gets
	 * wasted during the allocate of various pages and tables that are
	 * all different sizes.
	 * The start address will be page aligned.
	 * We allocate the kernel page directory on the first free 16KB
	 * boundary we find.
	 * We allocate the kernel page tables on the first 1KB boundary we
	 * find.  We allocate at least 9 PT's (12 currently).  This means
	 * that in the process we KNOW that we will encounter at least one
	 * 16KB boundary.
	 *
	 * Eventually if the top end of the memory gets used for process L1
	 * page tables the kernel L1 page table may be moved up there.
	 */

#ifdef VERBOSE_INIT_ARM
	printf("Allocating page tables\n");
#endif

	/* Define a macro to simplify memory allocation */
#define	valloc_pages(var, np)			\
	alloc_pages((var).pv_pa, (np));		\
	(var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start;
#define	alloc_pages(var, np)			\
	(var) = freemempos;			\
	freemempos += (np) * PAGE_SIZE;

	valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE);
	for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) {
		alloc_pages(kernel_pt_table[loop].pv_pa,
		    L2_TABLE_SIZE / PAGE_SIZE);
		kernel_pt_table[loop].pv_va = kernel_pt_table[loop].pv_pa;
	}

	/* This should never be able to happen but better confirm that. */
	if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0)
		panic("initarm: Failed to align the kernel page directory");

	/*
	 * Allocate a page for the system page mapped to V0x00000000
	 * This page will just contain the system vectors and can be
	 * shared by all processes.
	 */
	valloc_pages(systempage, 1);

	pt_size = round_page(freemempos) - physical_start;

	/* Allocate stacks for all modes */
	valloc_pages(irqstack, IRQ_STACK_SIZE);
	valloc_pages(abtstack, ABT_STACK_SIZE);
	valloc_pages(undstack, UND_STACK_SIZE);
	valloc_pages(kernelstack, UPAGES);

#ifdef VERBOSE_INIT_ARM
	printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa,
	    irqstack.pv_va); 
	printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa,
	    abtstack.pv_va); 
	printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa,
	    undstack.pv_va); 
	printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa,
	    kernelstack.pv_va); 
#endif

	alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE);

	/*
	 * XXX Actually, we only need virtual space and don't need
	 * XXX physical memory for sa110_cc_base and sa11x0_idle_mem.
	 */
	/*
	 * XXX totally stuffed hack to work round problems introduced
	 * in recent versions of the pmap code. Due to the calls used there
	 * we cannot allocate virtual memory during bootstrap.
	 */
	for (;;) {
		alloc_pages(sa1_cc_base, 1);
		if (!(sa1_cc_base & (CPU_SA110_CACHE_CLEAN_SIZE - 1)))
			break;
	}
	alloc_pages(sa1_cache_clean_addr, CPU_SA110_CACHE_CLEAN_SIZE / PAGE_SIZE - 1);

	sa1_cache_clean_addr = sa1_cc_base;
	sa1_cache_clean_size = CPU_SA110_CACHE_CLEAN_SIZE / 2;

	alloc_pages(sa11x0_idle_mem, 1);

	/*
	 * Ok, we have allocated physical pages for the primary kernel
	 * page tables.
	 */

#ifdef VERBOSE_INIT_ARM
	printf("Creating L1 page table\n");
#endif

	/*
	 * Now we start construction of the L1 page table.
	 * We start by mapping the L2 page tables into the L1.
	 * This means that we can replace L1 mappings later on if necessary.
	 */
	l1pagetable = kernel_l1pt.pv_pa;

	/* Map the L2 pages tables in the L1 page table */
	pmap_link_l2pt(l1pagetable, 0x00000000,
	    &kernel_pt_table[KERNEL_PT_SYS]);
#define SAIPIO_BASE		0xd0000000		/* XXX XXX */
	pmap_link_l2pt(l1pagetable, SAIPIO_BASE,
	    &kernel_pt_table[KERNEL_PT_IO]);
	for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; ++loop)
		pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000,
		    &kernel_pt_table[KERNEL_PT_KERNEL + loop]);
	for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; ++loop)
		pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000,
		    &kernel_pt_table[KERNEL_PT_VMDATA + loop]);

	/* update the top of the kernel VM */
	pmap_curmaxkvaddr =
	    KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000);

#ifdef VERBOSE_INIT_ARM
	printf("Mapping kernel\n");
#endif

	/* Now we fill in the L2 pagetable for the kernel code/data */

	/*
	 * XXX there is no ELF header to find RO region.
	 * XXX What should we do?
	 */
#if 0
	if (N_GETMAGIC(kernexec[0]) == ZMAGIC) {
		logical = pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE,
		    physical_start, kernexec->a_text,
		    VM_PROT_READ, PTE_CACHE);
		logical += pmap_map_chunk(l1pagetable,
		    KERNEL_TEXT_BASE + logical, physical_start + logical,
		    kerneldatasize - kernexec->a_text,
		    VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
	} else
#endif
		pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE,
		    KERNEL_TEXT_BASE - KERNEL_BASE + physical_start,
		    kerneldatasize, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);

#ifdef VERBOSE_INIT_ARM
	printf("Constructing L2 page tables\n");
#endif

	/* Map the stack pages */
	pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa,
	    IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
	pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa,
	    ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
	pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa,
	    UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
	pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa,
	    UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);

	pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa,
	    L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);

	/* Map page tables */
	pmap_map_chunk(l1pagetable, KERNEL_BASE, physical_start, pt_size,
	    VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);

	/* Map a page for entering idle mode */
	pmap_map_entry(l1pagetable, sa11x0_idle_mem, sa11x0_idle_mem,
	    VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE);

	/* Map the vector page. */
	pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa,
	    VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);

	/* Map the statically mapped devices. */
	pmap_devmap_bootstrap(l1pagetable, sa11x0_devmap);

	pmap_map_chunk(l1pagetable, sa1_cache_clean_addr, 0xe0000000,
	    CPU_SA110_CACHE_CLEAN_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);

	/*
	 * Now we have the real page tables in place so we can switch to them.
	 * Once this is done we will be running with the REAL kernel page
	 * tables.
	 */

#ifdef VERBOSE_INIT_ARM
	printf("done.\n");
#endif

	/*
	 * Pages were allocated during the secondary bootstrap for the
	 * stacks for different CPU modes.
	 * We must now set the r13 registers in the different CPU modes to
	 * point to these stacks.
	 * Since the ARM stacks use STMFD etc. we must set r13 to the top end
	 * of the stack memory.
	 */
#ifdef VERBOSE_INIT_ARM
	printf("init subsystems: stacks ");
#endif

	set_stackptr(PSR_IRQ32_MODE,
	    irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE);
	set_stackptr(PSR_ABT32_MODE,
	    abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE);
	set_stackptr(PSR_UND32_MODE,
	    undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE);
#ifdef PMAP_DEBUG
	if (pmap_debug_level >= 0)
		printf("kstack V%08lx P%08lx\n", kernelstack.pv_va,
		    kernelstack.pv_pa);
#endif /* PMAP_DEBUG */

	/*
	 * Well we should set a data abort handler.
	 * Once things get going this will change as we will need a proper
	 * handler. Until then we will use a handler that just panics but
	 * tells us why.
	 * Initialization of the vectors will just panic on a data abort.
	 * This just fills in a slightly better one.
	 */
#ifdef VERBOSE_INIT_ARM
	printf("vectors ");
#endif
	data_abort_handler_address = (u_int)data_abort_handler;
	prefetch_abort_handler_address = (u_int)prefetch_abort_handler;
	undefined_handler_address = (u_int)undefinedinstruction_bounce;
#ifdef DEBUG
	printf("%08x %08x %08x\n", data_abort_handler_address,
	    prefetch_abort_handler_address, undefined_handler_address); 
#endif

	/* Initialize the undefined instruction handlers */
#ifdef VERBOSE_INIT_ARM
	printf("undefined\n");
#endif
	undefined_init();

	/* Set the page table address. */
#ifdef VERBOSE_INIT_ARM
	printf("switching to new L1 page table  @%#lx...\n", kernel_l1pt.pv_pa);
#endif
	cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT);
	cpu_setttb(kernel_l1pt.pv_pa, true);
	cpu_tlb_flushID();
	cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2));

	/*
	 * Moved from cpu_startup() as data_abort_handler() references
	 * this during uvm init.
	 */
	uvm_lwp_setuarea(&lwp0, kernelstack.pv_va);

#ifdef BOOT_DUMP
	dumppages((char *)0xc0000000, 16 * PAGE_SIZE);
	dumppages((char *)0xb0100000, 64); /* XXX */
#endif
	/* Enable MMU, I-cache, D-cache, write buffer. */
	cpufunc_control(0x337f, 0x107d);

	arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL);

	consinit();

#ifdef VERBOSE_INIT_ARM
	printf("bootstrap done.\n");
#endif

#ifdef VERBOSE_INIT_ARM
	printf("freemempos=%08lx\n", freemempos);
	printf("MMU enabled. control=%08x\n", cpu_get_control());
#endif

	/* Load memory into UVM. */
	uvm_setpagesize();	/* initialize PAGE_SIZE-dependent variables */
	for (loop = 0; loop < bootconfig.dramblocks; loop++) {
		paddr_t dblk_start = (paddr_t)bootconfig.dram[loop].address;
		paddr_t dblk_end = dblk_start
			+ (bootconfig.dram[loop].pages * PAGE_SIZE);

		if (dblk_start < physical_freestart)
			dblk_start = physical_freestart;
		if (dblk_end > physical_freeend)
			dblk_end = physical_freeend;

		uvm_page_physload(atop(dblk_start), atop(dblk_end),
		    atop(dblk_start), atop(dblk_end), VM_FREELIST_DEFAULT);
	}

	/* Boot strap pmap telling it where the kernel page table is */
	pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE);

#ifdef BOOT_DUMP
	dumppages((char *)kernel_l1pt.pv_va, 16);
#endif

#ifdef DDB
	db_machine_init();
#endif
#if NKSYMS || defined(DDB) || defined(MODULAR)
	ksyms_addsyms_elf(symbolsize, ((int *)&end), ((char *)&end) + symbolsize);
#endif

	printf("kernsize=0x%x", kerneldatasize);
	printf(" (including 0x%x symbols)\n", symbolsize);

#ifdef DDB
	if (boothowto & RB_KDB)
		Debugger();
#endif /* DDB */

	/* We return the new stack pointer address */
	return (kernelstack.pv_va + USPACE_SVC_STACK_TOP);
}
コード例 #16
0
ファイル: nslu2_machdep.c プロジェクト: ryo/netbsd-src
/*
 * u_int initarm(...)
 *
 * Initial entry point on startup. This gets called before main() is
 * entered.
 * It should be responsible for setting up everything that must be
 * in place when main is called.
 * This includes
 *   Taking a copy of the boot configuration structure.
 *   Initialising the physical console so characters can be printed.
 *   Setting up page tables for the kernel
 *   Relocating the kernel to the bottom of physical memory
 */
u_int
initarm(void *arg)
{
	extern vaddr_t xscale_cache_clean_addr;
#ifdef DIAGNOSTIC
	extern vsize_t xscale_minidata_clean_size;
#endif
	int loop;
	int loop1;
	u_int kerneldatasize;
	u_int l1pagetable;
	u_int freemempos;
	uint32_t reg;

	/*
	 * Make sure the power-down GPIO pin is configured correctly, as
	 * cpu_reboot() may be called early on (e.g. from within ddb(9)).
	 */
	/* Pin is active-high, so make sure it's driven low */
	reg = GPRD(IXP425_GPIO_GPOUTR);
	reg &= ~(1u << GPIO_POWER_OFF);
	GPWR(IXP425_GPIO_GPOUTR, reg);

	/* Set as output */
	reg = GPRD(IXP425_GPIO_GPOER);
	reg &= ~(1u << GPIO_POWER_OFF);
	GPWR(IXP425_GPIO_GPOER, reg);

	/*
	 * Since we map v0xf0000000 == p0xc8000000, it's possible for
	 * us to initialize the console now.
	 */
	consinit();

#ifdef VERBOSE_INIT_ARM
	/* Talk to the user */
	printf("\nNetBSD/evbarm (Linksys NSLU2) booting ...\n");
#endif

	/*
	 * Heads up ... Setup the CPU / MMU / TLB functions
	 */
	if (set_cpufuncs())
		panic("cpu not recognized!");

	/* XXX overwrite bootconfig to hardcoded values */
	bootconfig.dramblocks = 1;
	bootconfig.dram[0].address = 0x10000000;
	bootconfig.dram[0].pages = ixp425_sdram_size() / PAGE_SIZE;

	kerneldatasize = (uint32_t)&end - (uint32_t)KERNEL_TEXT_BASE;

#ifdef VERBOSE_INIT_ARM
        printf("kernsize=0x%x\n", kerneldatasize);
#endif
        kerneldatasize = ((kerneldatasize - 1) & ~(PAGE_SIZE * 4 - 1)) + PAGE_SIZE * 8;

	/*
	 * Set up the variables that define the availablilty of
	 * physical memory.  For now, we're going to set
	 * physical_freestart to 0x10200000 (where the kernel
	 * was loaded), and allocate the memory we need downwards.
	 * If we get too close to the L1 table that we set up, we
	 * will panic.  We will update physical_freestart and
	 * physical_freeend later to reflect what pmap_bootstrap()
	 * wants to see.
	 *
	 * XXX pmap_bootstrap() needs an enema.
	 */
	physical_start = bootconfig.dram[0].address;
	physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE);

	physical_freestart = physical_start
                + (KERNEL_TEXT_BASE - KERNEL_BASE) + kerneldatasize;
        physical_freeend = physical_end;

	physmem = (physical_end - physical_start) / PAGE_SIZE;

	/* Tell the user about the memory */
#ifdef VERBOSE_INIT_ARM
	printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem,
	    physical_start, physical_end - 1);

	printf("Allocating page tables\n");
#endif
	free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE;

	freemempos = 0x10000000;

#ifdef VERBOSE_INIT_ARM
        printf("physical_start = 0x%08lx, physical_end = 0x%08lx\n",
                physical_start, physical_end);
#endif

	/* Define a macro to simplify memory allocation */
#define	valloc_pages(var, np)				\
	alloc_pages((var).pv_pa, (np));			\
	(var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start;

#if 0
#define alloc_pages(var, np)				\
	physical_freeend -= ((np) * PAGE_SIZE);		\
	if (physical_freeend < physical_freestart)	\
		panic("initarm: out of memory");	\
	(var) = physical_freeend;			\
	free_pages -= (np);				\
	memset((char *)(var), 0, ((np) * PAGE_SIZE));
#else
#define alloc_pages(var, np)				\
        (var) = freemempos;                             \
        memset((char *)(var), 0, ((np) * PAGE_SIZE));   \
        freemempos += (np) * PAGE_SIZE;
#endif

	loop1 = 0;
	for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) {
		/* Are we 16KB aligned for an L1 ? */
		if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0
		    && kernel_l1pt.pv_pa == 0) {
			valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE);
		} else {
			valloc_pages(kernel_pt_table[loop1],
			    L2_TABLE_SIZE / PAGE_SIZE);
			++loop1;
		}
	}

	/* This should never be able to happen but better confirm that. */
	if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0)
		panic("initarm: Failed to align the kernel page directory");

	/*
	 * Allocate a page for the system page.
	 * This page will just contain the system vectors and can be
	 * shared by all processes.
	 */
	alloc_pages(systempage.pv_pa, 1);

	/* Allocate stacks for all modes */
	valloc_pages(irqstack, IRQ_STACK_SIZE);
	valloc_pages(abtstack, ABT_STACK_SIZE);
	valloc_pages(undstack, UND_STACK_SIZE);
	valloc_pages(kernelstack, UPAGES);

	/* Allocate enough pages for cleaning the Mini-Data cache. */
	KASSERT(xscale_minidata_clean_size <= PAGE_SIZE);
	valloc_pages(minidataclean, 1);

#ifdef VERBOSE_INIT_ARM
	printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa,
	    irqstack.pv_va); 
	printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa,
	    abtstack.pv_va); 
	printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa,
	    undstack.pv_va); 
	printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa,
	    kernelstack.pv_va); 
#endif

	/*
	 * XXX Defer this to later so that we can reclaim the memory
	 * XXX used by the RedBoot page tables.
	 */
	alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE);

	/*
	 * Ok we have allocated physical pages for the primary kernel
	 * page tables
	 */

#ifdef VERBOSE_INIT_ARM
	printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa);
#endif

	/*
	 * Now we start construction of the L1 page table
	 * We start by mapping the L2 page tables into the L1.
	 * This means that we can replace L1 mappings later on if necessary
	 */
	l1pagetable = kernel_l1pt.pv_pa;

	/* Map the L2 pages tables in the L1 page table */
	pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1),
	    &kernel_pt_table[KERNEL_PT_SYS]);
	for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++)
		pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000,
		    &kernel_pt_table[KERNEL_PT_KERNEL + loop]);
	for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++)
		pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000,
		    &kernel_pt_table[KERNEL_PT_VMDATA + loop]);

	/* update the top of the kernel VM */
	pmap_curmaxkvaddr =
	    KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000);

	pmap_link_l2pt(l1pagetable, IXP425_IO_VBASE,
	    &kernel_pt_table[KERNEL_PT_IO]);

#ifdef VERBOSE_INIT_ARM
	printf("Mapping kernel\n");
#endif

	/* Now we fill in the L2 pagetable for the kernel static code/data */
	{
		extern char etext[], _end[];
		size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE;
		size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE;
		u_int logical;

		textsize = (textsize + PGOFSET) & ~PGOFSET;
		totalsize = (totalsize + PGOFSET) & ~PGOFSET;
		
		logical = 0x00200000;	/* offset of kernel in RAM */

		logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical,
		    physical_start + logical, textsize,
		    VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
		logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical,
		    physical_start + logical, totalsize - textsize,
		    VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
	}

#ifdef VERBOSE_INIT_ARM
	printf("Constructing L2 page tables\n");
#endif

	/* Map the stack pages */
	pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa,
	    IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
	pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa,
	    ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
	pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa,
	    UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
	pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa,
	    UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);

	pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa,
	    L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);

	for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) {
		pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va,
		    kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE,
		    VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
	}

	/* Map the Mini-Data cache clean area. */
	xscale_setup_minidata(l1pagetable, minidataclean.pv_va,
	    minidataclean.pv_pa);

	/* Map the vector page. */
	pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa,
	    VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);

        /*
         * Map the IXP425 registers
         */
	pmap_devmap_bootstrap(l1pagetable, nslu2_devmap);

	/*
	 * Give the XScale global cache clean code an appropriately
	 * sized chunk of unmapped VA space starting at 0xff000000
	 * (our device mappings end before this address).
	 */
	xscale_cache_clean_addr = 0xff000000U;

	/*
	 * Now we have the real page tables in place so we can switch to them.
	 * Once this is done we will be running with the REAL kernel page
	 * tables.
	 */

	/*
	 * Update the physical_freestart/physical_freeend/free_pages
	 * variables.
	 */
	{
		extern char _end[];

		physical_freestart = physical_start +
		    (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) -
		     KERNEL_BASE);
		physical_freeend = physical_end;
		free_pages =
		    (physical_freeend - physical_freestart) / PAGE_SIZE;
	}

	/* Switch tables */
#ifdef VERBOSE_INIT_ARM
	printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n",
	       physical_freestart, free_pages, free_pages);
	printf("switching to new L1 page table  @%#lx...", kernel_l1pt.pv_pa);
#endif
	cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT);
	cpu_setttb(kernel_l1pt.pv_pa, true);
	cpu_tlb_flushID();
	cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2));

	/*
	 * Moved from cpu_startup() as data_abort_handler() references
	 * this during uvm init
	 */
	uvm_lwp_setuarea(&lwp0, kernelstack.pv_va);

#ifdef VERBOSE_INIT_ARM
	printf("bootstrap done.\n");
#endif

	arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL);

	/*
	 * Pages were allocated during the secondary bootstrap for the
	 * stacks for different CPU modes.
	 * We must now set the r13 registers in the different CPU modes to
	 * point to these stacks.
	 * Since the ARM stacks use STMFD etc. we must set r13 to the top end
	 * of the stack memory.
	 */
#ifdef VERBOSE_INIT_ARM
	printf("init subsystems: stacks ");
#endif

	set_stackptr(PSR_IRQ32_MODE,
	    irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE);
	set_stackptr(PSR_ABT32_MODE,
	    abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE);
	set_stackptr(PSR_UND32_MODE,
	    undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE);

	/*
	 * Well we should set a data abort handler.
	 * Once things get going this will change as we will need a proper
	 * handler.
	 * Until then we will use a handler that just panics but tells us
	 * why.
	 * Initialisation of the vectors will just panic on a data abort.
	 * This just fills in a slightly better one.
	 */
#ifdef VERBOSE_INIT_ARM
	printf("vectors ");
#endif
	data_abort_handler_address = (u_int)data_abort_handler;
	prefetch_abort_handler_address = (u_int)prefetch_abort_handler;
	undefined_handler_address = (u_int)undefinedinstruction_bounce;

	/* Initialise the undefined instruction handlers */
#ifdef VERBOSE_INIT_ARM
	printf("undefined ");
#endif
	undefined_init();

	/* Load memory into UVM. */
#ifdef VERBOSE_INIT_ARM
	printf("page ");
#endif
	uvm_setpagesize();	/* initialize PAGE_SIZE-dependent variables */
	uvm_page_physload(atop(physical_freestart), atop(physical_freeend),
	    atop(physical_freestart), atop(physical_freeend),
	    VM_FREELIST_DEFAULT);

	/* Boot strap pmap telling it where the kernel page table is */
#ifdef VERBOSE_INIT_ARM
	printf("pmap ");
#endif
	pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE);

	/* Setup the IRQ system */
#ifdef VERBOSE_INIT_ARM
	printf("irq ");
#endif
	ixp425_intr_init();
#ifdef VERBOSE_INIT_ARM
	printf("\nAll initialization done!\nNow Starting NetBSD, Here we go!\n");
#endif

#ifdef BOOTHOWTO
	boothowto = BOOTHOWTO;
#endif

#ifdef DDB
	db_machine_init();
	if (boothowto & RB_KDB)
		Debugger();
#endif

	/* We return the new stack pointer address */
	return(kernelstack.pv_va + USPACE_SVC_STACK_TOP);
}
コード例 #17
0
u_int
initarm(void *arg)
{
	int loop;
	int loop1;
	u_int l1pagetable;
	extern char _end[];

	/*
	 * Turn the led off, then turn it yellow.
	 * 0x80 - red; 0x04 - fan; 0x02 - green.
	 */
	ISA_PUTBYTE(0x338, 0x04);
	ISA_PUTBYTE(0x338, 0x86);

	/*
	 * Set up a diagnostic console so we can see what's going
	 * on.
	 */
	cn_tab = &kcomcons;

	/* Talk to the user */
	printf("\nNetBSD/netwinder booting ...\n");

	/*
	 * Heads up ... Setup the CPU / MMU / TLB functions
	 */
	if (set_cpufuncs())
		panic("CPU not recognized!");

	/*
	 * We are currently running with the MMU enabled and the
	 * entire address space mapped VA==PA, except for the
	 * first 64MB of RAM is also double-mapped at 0xf0000000.
	 * There is an L1 page table at 0x00008000.
	 *
	 * We also have the 21285's PCI I/O space mapped where
	 * we expect it.
	 */

	printf("initarm: Configuring system ...\n");

	/*
	 * Copy out the boot info passed by the firmware.  Note that
	 * early versions of NeTTrom fill this in with bogus values,
	 * so we need to sanity check it.
	 */
	memcpy(&nwbootinfo, (void *)(KERNEL_BASE + 0x100),
	    sizeof(nwbootinfo));
#ifdef VERBOSE_INIT_ARM
	printf("NeTTrom boot info:\n");
	printf("\tpage size = 0x%08lx\n", nwbootinfo.bi_pagesize);
	printf("\tnpages = %ld (0x%08lx)\n", nwbootinfo.bi_nrpages,
	    nwbootinfo.bi_nrpages);
	printf("\trootdev = 0x%08lx\n", nwbootinfo.bi_rootdev);
	printf("\tcmdline = %s\n", nwbootinfo.bi_cmdline);
#endif
	if (nwbootinfo.bi_nrpages != 0x02000 &&
	    nwbootinfo.bi_nrpages != 0x04000 &&
	    nwbootinfo.bi_nrpages != 0x08000 &&
	    nwbootinfo.bi_nrpages != 0x10000) {
		nwbootinfo.bi_pagesize = 0xdeadbeef;
		nwbootinfo.bi_nrpages = 0x01000;	/* 16MB */
		nwbootinfo.bi_rootdev = 0;
	}

	/* Fake bootconfig structure for the benefit of pmap.c */
	/* XXX must make the memory description h/w independent */
	bootconfig.dramblocks = 1;
	bootconfig.dram[0].address = 0;
	bootconfig.dram[0].pages = nwbootinfo.bi_nrpages;

	/*
	 * Set up the variables that define the availablilty of
	 * physical memory.
	 *
	 * Since the NetWinder NeTTrom doesn't load ELF symbols
	 * for us, we can safely assume that everything after end[]
	 * is free.  We start there and allocate upwards.
	 */
	physical_start = bootconfig.dram[0].address;
	physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE);

	physical_freestart = ((((vaddr_t) _end) + PGOFSET) & ~PGOFSET) -
	    KERNEL_BASE;
	physical_freeend = physical_end;
	free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE;

#ifdef VERBOSE_INIT_ARM
	printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n",
	       physical_freestart, free_pages, free_pages);
#endif

	physmem = (physical_end - physical_start) / PAGE_SIZE;

	/* Tell the user about the memory */
	printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem,
	    physical_start, physical_end - 1);

	/*
	 * Okay, we need to allocate some fixed page tables to get the
	 * kernel going.  We allocate one page directory and a number
	 * of page tables and store the physical addresses in the
	 * kernel_pt_table array.
	 *
	 * The kernel page directory must be on a 16K boundary.  The page
	 * tables must be on 4K boundaries.  What we do is allocate the
	 * page directory on the first 16K boundary that we encounter,
	 * and the page tables on 4K boundaries otherwise.  Since we
	 * allocate at least 3 L2 page tables, we are guaranteed to
	 * encounter at least one 16K aligned region.
	 */

#ifdef VERBOSE_INIT_ARM
	printf("Allocating page tables\n");
#endif

	/* Define a macro to simplify memory allocation */
#define	valloc_pages(var, np)			\
	alloc_pages((var).pv_pa, (np));		\
	(var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start;

#define alloc_pages(var, np)			\
	(var) = physical_freestart;		\
	physical_freestart += ((np) * PAGE_SIZE);\
	free_pages -= (np);			\
	memset((char *)(var), 0, ((np) * PAGE_SIZE));

	loop1 = 0;
	for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) {
		/* Are we 16KB aligned for an L1 ? */
		if ((physical_freestart & (L1_TABLE_SIZE - 1)) == 0
		    && kernel_l1pt.pv_pa == 0) {
			valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE);
		} else {
			valloc_pages(kernel_pt_table[loop1],
			    L2_TABLE_SIZE / PAGE_SIZE);
			++loop1;
		}
	}

	/* This should never be able to happen but better confirm that. */
	if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0)
		panic("initarm: Failed to align the kernel page directory");

	/*
	 * Allocate a page for the system page mapped to V0x00000000
	 * This page will just contain the system vectors and can be
	 * shared by all processes.
	 */
	alloc_pages(systempage.pv_pa, 1);

	/* Allocate stacks for all modes */
	valloc_pages(irqstack, IRQ_STACK_SIZE);
	valloc_pages(abtstack, ABT_STACK_SIZE);
	valloc_pages(undstack, UND_STACK_SIZE);
	valloc_pages(kernelstack, UPAGES);

#ifdef VERBOSE_INIT_ARM
	printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa,
	    irqstack.pv_va); 
	printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa,
	    abtstack.pv_va); 
	printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa,
	    undstack.pv_va); 
	printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa,
	    kernelstack.pv_va); 
#endif

	alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE);

	/*
	 * Ok we have allocated physical pages for the primary kernel
	 * page tables
	 */

#ifdef VERBOSE_INIT_ARM
	printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa);
#endif

	/*
	 * Now we start consturction of the L1 page table
	 * We start by mapping the L2 page tables into the L1.
	 * This means that we can replace L1 mappings later on if necessary
	 */
	l1pagetable = kernel_l1pt.pv_pa;

	/* Map the L2 pages tables in the L1 page table */
	pmap_link_l2pt(l1pagetable, 0x00000000,
	    &kernel_pt_table[KERNEL_PT_SYS]);
	pmap_link_l2pt(l1pagetable, KERNEL_BASE,
	    &kernel_pt_table[KERNEL_PT_KERNEL]);
	for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; ++loop)
		pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000,
		    &kernel_pt_table[KERNEL_PT_VMDATA + loop]);

	/* update the top of the kernel VM */
	pmap_curmaxkvaddr =
	    KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000);

#ifdef VERBOSE_INIT_ARM
	printf("Mapping kernel\n");
#endif

	/* Now we fill in the L2 pagetable for the kernel static code/data */
	{
		/*
		 * The kernel starts in the first 1MB of RAM, and we'd
		 * like to use a section mapping for text, so we'll just
		 * map from KERNEL_BASE to etext[] to _end[].
		 */

		extern char etext[];
		size_t textsize = (uintptr_t) etext - KERNEL_BASE;
		size_t totalsize = (uintptr_t) _end - KERNEL_BASE;
		u_int logical;

		textsize = (textsize + PGOFSET) & ~PGOFSET;
		totalsize = (totalsize + PGOFSET) & ~PGOFSET;

		textsize = textsize & ~PGOFSET;
		totalsize = (totalsize + PGOFSET) & ~PGOFSET;

		logical = 0;		/* offset into RAM */

		logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical,
		    physical_start + logical, textsize,
		    VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
		logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical,
		    physical_start + logical, totalsize - textsize,
		    VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
	}

#ifdef VERBOSE_INIT_ARM
	printf("Constructing L2 page tables\n");
#endif

	/* Map the stack pages */
	pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa,
	    IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
	pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa,
	    ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
	pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa,
	    UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
	pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa,
	    UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);

	pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa,
	    L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);

	for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) {
		pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va,
		    kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE,
		    VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
	}

	/* Map the vector page. */
	pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa,
	    VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);

	/*
	 * Map devices we can map w/ section mappings.
	 */
	loop = 0;
	while (l1_sec_table[loop].size) {
		vsize_t sz;

#ifdef VERBOSE_INIT_ARM
		printf("%08lx -> %08lx @ %08lx\n", l1_sec_table[loop].pa,
		    l1_sec_table[loop].pa + l1_sec_table[loop].size - 1,
		    l1_sec_table[loop].va);
#endif
		for (sz = 0; sz < l1_sec_table[loop].size; sz += L1_S_SIZE)
			pmap_map_section(l1pagetable,
			    l1_sec_table[loop].va + sz,
			    l1_sec_table[loop].pa + sz,
			    l1_sec_table[loop].prot,
			    l1_sec_table[loop].cache);
		++loop;
	}

	/*
	 * Now we have the real page tables in place so we can switch to them.
	 * Once this is done we will be running with the REAL kernel page
	 * tables.
	 */

	/* Switch tables */
#ifdef VERBOSE_INIT_ARM
	printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n",
	       physical_freestart, free_pages, free_pages);
	printf("switching to new L1 page table  @%#lx...", kernel_l1pt.pv_pa);
#endif

	cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT);
	cpu_setttb(kernel_l1pt.pv_pa, true);
	cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2));

	/*
	 * Moved from cpu_startup() as data_abort_handler() references
	 * this during uvm init
	 */
	uvm_lwp_setuarea(&lwp0, kernelstack.pv_va);

#ifdef VERBOSE_INIT_ARM
	printf("done!\n");
#endif

	/*
	 * XXX this should only be done in main() but it useful to
	 * have output earlier ...
	 */
	consinit();

#ifdef VERBOSE_INIT_ARM
	printf("bootstrap done.\n");
#endif

	arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL);

	/*
	 * Pages were allocated during the secondary bootstrap for the
	 * stacks for different CPU modes.
	 * We must now set the r13 registers in the different CPU modes to
	 * point to these stacks.
	 * Since the ARM stacks use STMFD etc. we must set r13 to the top end
	 * of the stack memory.
	 */
	printf("init subsystems: stacks ");

	set_stackptr(PSR_IRQ32_MODE,
	    irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE);
	set_stackptr(PSR_ABT32_MODE,
	    abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE);
	set_stackptr(PSR_UND32_MODE,
	    undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE);

	/*
	 * Well we should set a data abort handler.
	 * Once things get going this will change as we will need a proper
	 * handler.
	 * Until then we will use a handler that just panics but tells us
	 * why.
	 * Initialisation of the vectors will just panic on a data abort.
	 * This just fills in a slightly better one.
	 */
	printf("vectors ");
	data_abort_handler_address = (u_int)data_abort_handler;
	prefetch_abort_handler_address = (u_int)prefetch_abort_handler;
	undefined_handler_address = (u_int)undefinedinstruction_bounce;

	/* Initialise the undefined instruction handlers */
	printf("undefined ");
	undefined_init();

	/* Load memory into UVM. */
	printf("page ");
	uvm_setpagesize();	/* initialize PAGE_SIZE-dependent variables */

	/* XXX Always one RAM block -- nuke the loop. */
	for (loop = 0; loop < bootconfig.dramblocks; loop++) {
		paddr_t start = (paddr_t)bootconfig.dram[loop].address;
		paddr_t end = start + (bootconfig.dram[loop].pages * PAGE_SIZE);
#if NISADMA > 0
		paddr_t istart, isize;
		extern struct arm32_dma_range *footbridge_isa_dma_ranges;
		extern int footbridge_isa_dma_nranges;
#endif

		if (start < physical_freestart)
			start = physical_freestart;
		if (end > physical_freeend)
			end = physical_freeend;

#if 0
		printf("%d: %lx -> %lx\n", loop, start, end - 1);
#endif

#if NISADMA > 0
		if (arm32_dma_range_intersect(footbridge_isa_dma_ranges,
					      footbridge_isa_dma_nranges,
					      start, end - start,
					      &istart, &isize)) {
			/*
			 * Place the pages that intersect with the
			 * ISA DMA range onto the ISA DMA free list.
			 */
#if 0
			printf("    ISADMA 0x%lx -> 0x%lx\n", istart,
			    istart + isize - 1);
#endif
			uvm_page_physload(atop(istart),
			    atop(istart + isize), atop(istart),
			    atop(istart + isize), VM_FREELIST_ISADMA);

			/*
			 * Load the pieces that come before the
			 * intersection onto the default free list.
			 */
			if (start < istart) {
#if 0
				printf("    BEFORE 0x%lx -> 0x%lx\n",
				    start, istart - 1);
#endif
				uvm_page_physload(atop(start),
				    atop(istart), atop(start),
				    atop(istart), VM_FREELIST_DEFAULT);
			}

			/*
			 * Load the pieces that come after the
			 * intersection onto the default free list.
			 */
			if ((istart + isize) < end) {
#if 0
				printf("     AFTER 0x%lx -> 0x%lx\n",
				    (istart + isize), end - 1);
#endif
				uvm_page_physload(atop(istart + isize),
				    atop(end), atop(istart + isize),
				    atop(end), VM_FREELIST_DEFAULT);
			}
		} else {
			uvm_page_physload(atop(start), atop(end),
			    atop(start), atop(end), VM_FREELIST_DEFAULT);
		}
#else /* NISADMA > 0 */
		uvm_page_physload(atop(start), atop(end),
		    atop(start), atop(end), VM_FREELIST_DEFAULT);
#endif /* NISADMA > 0 */
	}

	/* Boot strap pmap telling it where the kernel page table is */
	printf("pmap ");
	pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE);

	/* Now that pmap is inited, we can set cpu_reset_address */
	cpu_reset_address_paddr = vtophys((vaddr_t)netwinder_reset);

	/* Setup the IRQ system */
	printf("irq ");
	footbridge_intr_init();
	printf("done.\n");

	/*
	 * Warn the user if the bootinfo was bogus.  We already
	 * faked up some safe values.
	 */
	if (nwbootinfo.bi_pagesize == 0xdeadbeef)
		printf("WARNING: NeTTrom boot info corrupt\n");

#ifdef DDB
	db_machine_init();
	if (boothowto & RB_KDB)
		Debugger();
#endif

	/* Turn the led green */
	ISA_PUTBYTE(0x338, 0x06);

	/* We return the new stack pointer address */
	return(kernelstack.pv_va + USPACE_SVC_STACK_TOP);
}
コード例 #18
0
ファイル: machdep.c プロジェクト: lacombar/netbsd-alc
/*
 * Do all the stuff that locore normally does before calling main().
 */
void
mach_init(long fwhandle, long magic, long bootdata, long reserved)
{
	void *kernend, *p0;
	u_long first, last;
	extern char edata[], end[];
	int i;
	uint32_t config;

	/* XXX this code must run on the target CPU */
	config = mips3_cp0_config_read();
	config &= ~MIPS3_CONFIG_K0_MASK;
	config |= 0x05;				/* XXX.  cacheable coherent */
	mips3_cp0_config_write(config);

	/* Zero BSS.  XXXCGD: uh, is this really necessary still?  */
	memset(edata, 0, end - edata);

	/*
	 * Copy the bootinfo structure from the boot loader.
	 * this has to be done before mips_vector_init is
	 * called because we may need CFE's TLB handler
	 */

	if (magic == BOOTINFO_MAGIC)
		memcpy(&bootinfo, (struct bootinfo_v1 *)bootdata,
		    sizeof bootinfo);
	else if (reserved == CFE_EPTSEAL) {
		magic = BOOTINFO_MAGIC;
		bzero(&bootinfo, sizeof bootinfo);
		bootinfo.version = BOOTINFO_VERSION;
		bootinfo.fwhandle = fwhandle;
		bootinfo.fwentry = bootdata;
		bootinfo.ssym = (vaddr_t)end;
		bootinfo.esym = (vaddr_t)end;
	}

	kernend = (void *)mips_round_page(end);
#if NKSYMS || defined(DDB) || defined(LKM)
	if (magic == BOOTINFO_MAGIC) {
		ksym_start = (void *)bootinfo.ssym;
		ksym_end   = (void *)bootinfo.esym;
		kernend = (void *)mips_round_page((vaddr_t)ksym_end);
	}
#endif

	consinit();

	uvm_setpagesize();

	/*
	 * Copy exception-dispatch code down to exception vector.
	 * Initialize locore-function vector.
	 * Clear out the I and D caches.
	 */
	mips_vector_init();

#ifdef DEBUG
	printf("fwhandle=%08X magic=%08X bootdata=%08X reserved=%08X\n",
	    (u_int)fwhandle, (u_int)magic, (u_int)bootdata, (u_int)reserved);
#endif

	strcpy(cpu_model, "sb1250");

	if (magic == BOOTINFO_MAGIC) {
		int idx;
		int added;
		uint64_t start, len, type;

		cfe_init(bootinfo.fwhandle, bootinfo.fwentry);
		cfe_present = 1;

		idx = 0;
		physmem = 0;
		mem_cluster_cnt = 0;
		while (cfe_enummem(idx, 0, &start, &len, &type) == 0) {
			added = 0;
			printf("Memory Block #%d start %08"PRIx64"X len %08"PRIx64"X: %s: ",
			    idx, start, len, (type == CFE_MI_AVAILABLE) ?
			    "Available" : "Reserved");
			if ((type == CFE_MI_AVAILABLE) &&
			    (mem_cluster_cnt < VM_PHYSSEG_MAX)) {
				/*
				 * XXX Ignore memory above 256MB for now, it
				 * XXX needs special handling.
				 */
				if (start < (256*1024*1024)) {
				    physmem += btoc(((int) len));
				    mem_clusters[mem_cluster_cnt].start =
					(long) start;
				    mem_clusters[mem_cluster_cnt].size =
					(long) len;
				    mem_cluster_cnt++;
				    added = 1;
				}
			}
			if (added)
				printf("added to map\n");
			else
				printf("not added to map\n");
			idx++;
		}

	} else {
		/*
		 * Handle the case of not being called from the firmware.
		 */
		/* XXX hardwire to 32MB; should be kernel config option */
		physmem = 32 * 1024 * 1024 / 4096;
		mem_clusters[0].start = 0;
		mem_clusters[0].size = ctob(physmem);
		mem_cluster_cnt = 1;
	}


	for (i = 0; i < sizeof(bootinfo.boot_flags); i++) {
		switch (bootinfo.boot_flags[i]) {
		case '\0':
			break;
		case ' ':
			continue;
		case '-':
			while (bootinfo.boot_flags[i] != ' ' &&
			    bootinfo.boot_flags[i] != '\0') {
				switch (bootinfo.boot_flags[i]) {
				case 'a':
					boothowto |= RB_ASKNAME;
					break;
				case 'd':
					boothowto |= RB_KDB;
					break;
				case 's':
					boothowto |= RB_SINGLE;
					break;
				}
				i++;
			}
		}
	}

	/*
	 * Load the rest of the available pages into the VM system.
	 * The first chunk is tricky because we have to avoid the
	 * kernel, but the rest are easy.
	 */
	first = round_page(MIPS_KSEG0_TO_PHYS(kernend));
	last = mem_clusters[0].start + mem_clusters[0].size;
	uvm_page_physload(atop(first), atop(last), atop(first), atop(last),
		VM_FREELIST_DEFAULT);

	for (i = 1; i < mem_cluster_cnt; i++) {
		first = round_page(mem_clusters[i].start);
		last = mem_clusters[i].start + mem_clusters[i].size;
		uvm_page_physload(atop(first), atop(last), atop(first),
		    atop(last), VM_FREELIST_DEFAULT);
	}

	/*
	 * Initialize error message buffer (at end of core).
	 */
	mips_init_msgbuf();

	/*
	 * Allocate space for proc0's USPACE
	 */
	p0 = (void *)pmap_steal_memory(USPACE, NULL, NULL);
	lwp0.l_addr = proc0paddr = (struct user *)p0;
	lwp0.l_md.md_regs = (struct frame *)((char *)p0 + USPACE) - 1;
	proc0paddr->u_pcb.pcb_context[11] =
	    MIPS_INT_MASK | MIPS_SR_INT_IE; /* SR */

	pmap_bootstrap();

	/*
	 * Initialize debuggers, and break into them, if appropriate.
	 */
#if NKSYMS || defined(DDB) || defined(LKM)
	ksyms_init(((uintptr_t)ksym_end - (uintptr_t)ksym_start),
	    ksym_start, ksym_end);
#endif

	if (boothowto & RB_KDB) {
#if defined(DDB)
		Debugger();
#endif
	}
}
コード例 #19
0
ファイル: viper_machdep.c プロジェクト: lacombar/netbsd-alc
/*
 * u_int initarm(...)
 *
 * Initial entry point on startup. This gets called before main() is
 * entered.
 * It should be responsible for setting up everything that must be
 * in place when main is called.
 * This includes
 *   Taking a copy of the boot configuration structure.
 *   Initialising the physical console so characters can be printed.
 *   Setting up page tables for the kernel
 *   Relocating the kernel to the bottom of physical memory
 */
u_int
initarm(void *arg)
{
	extern vaddr_t xscale_cache_clean_addr;
	int loop;
	int loop1;
	u_int l1pagetable;
#ifdef DIAGNOSTIC
	extern vsize_t xscale_minidata_clean_size; /* used in KASSERT */
#endif

	/* Register devmap for devices we mapped in start */
	pmap_devmap_register(viper_devmap);

	/* start 32.768 kHz OSC */
	ioreg_write(VIPER_CLKMAN_VBASE + 0x08, 2);
	/* Get ready for splfoo() */
	pxa2x0_intr_bootstrap(VIPER_INTCTL_VBASE);

	/*
	 * Heads up ... Setup the CPU / MMU / TLB functions
	 */
	if (set_cpufuncs())
		panic("cpu not recognized!");

#if 0
	/* Calibrate the delay loop. */
#endif

	/* setup GPIO for BTUART, in case bootloader doesn't take care of it */
	pxa2x0_gpio_bootstrap(VIPER_GPIO_VBASE);
	pxa2x0_gpio_config(viper_gpioconf);

	/* turn on clock to UART block.
	   XXX: this should not be done here. */
	ioreg_write(VIPER_CLKMAN_VBASE+CLKMAN_CKEN, CKEN_FFUART|CKEN_BTUART |
	    ioreg_read(VIPER_CLKMAN_VBASE+CLKMAN_CKEN));

	consinit();
#ifdef KGDB
	kgdb_port_init();
#endif
	/* Talk to the user */
	printf("\nNetBSD/evbarm (viper) booting ...\n");

#if 0
	/*
	 * Examine the boot args string for options we need to know about
	 * now.
	 */
	process_kernel_args((char *)nwbootinfo.bt_args);
#endif

	printf("initarm: Configuring system ...\n");

	/* Fake bootconfig structure for the benefit of pmap.c */
	/* XXX must make the memory description h/w independent */
	bootconfig.dramblocks = 1;
	bootconfig.dram[0].address = MEMSTART;
	bootconfig.dram[0].pages = MEMSIZE / PAGE_SIZE;

	/*
	 * Set up the variables that define the availablilty of
	 * physical memory.  For now, we're going to set
	 * physical_freestart to 0xa0200000 (where the kernel
	 * was loaded), and allocate the memory we need downwards.
	 * If we get too close to the page tables that RedBoot
	 * set up, we will panic.  We will update physical_freestart
	 * and physical_freeend later to reflect what pmap_bootstrap()
	 * wants to see.
	 *
	 * XXX pmap_bootstrap() needs an enema.
	 * (now that would be truly hardcore XXX)
	 */
	physical_start = bootconfig.dram[0].address;
	physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE);

	physical_freestart = 0xa0009000UL;
	physical_freeend = 0xa0200000UL;

	physmem = (physical_end - physical_start) / PAGE_SIZE;

#ifdef VERBOSE_INIT_ARM
	/* Tell the user about the memory */
	printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem,
	    physical_start, physical_end - 1);
#endif

	/*
	 * Okay, the kernel starts 2MB in from the bottom of physical
	 * memory.  We are going to allocate our bootstrap pages downwards
	 * from there.
	 *
	 * We need to allocate some fixed page tables to get the kernel
	 * going.  We allocate one page directory and a number of page
	 * tables and store the physical addresses in the kernel_pt_table
	 * array.
	 *
	 * The kernel page directory must be on a 16K boundary.  The page
	 * tables must be on 4K boundaries.  What we do is allocate the
	 * page directory on the first 16K boundary that we encounter, and
	 * the page tables on 4K boundaries otherwise.  Since we allocate
	 * at least 3 L2 page tables, we are guaranteed to encounter at
	 * least one 16K aligned region.
	 */

#ifdef VERBOSE_INIT_ARM
	printf("Allocating page tables\n");
#endif

	free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE;

#ifdef VERBOSE_INIT_ARM
	printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n",
	       physical_freestart, free_pages, free_pages);
#endif

	/* Define a macro to simplify memory allocation */
#define	valloc_pages(var, np)				\
	alloc_pages((var).pv_pa, (np));			\
	(var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start;

#define alloc_pages(var, np)				\
	physical_freeend -= ((np) * PAGE_SIZE);		\
	if (physical_freeend < physical_freestart)	\
		panic("initarm: out of memory");	\
	(var) = physical_freeend;			\
	free_pages -= (np);				\
	memset((char *)(var), 0, ((np) * PAGE_SIZE));

	loop1 = 0;
	for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) {
		/* Are we 16KB aligned for an L1 ? */
		if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0
		    && kernel_l1pt.pv_pa == 0) {
			valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE);
		} else {
			valloc_pages(kernel_pt_table[loop1],
			    L2_TABLE_SIZE / PAGE_SIZE);
			++loop1;
		}
	}

	/* This should never be able to happen but better confirm that. */
	if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0)
		panic("initarm: Failed to align the kernel page directory");

	/*
	 * Allocate a page for the system page mapped to V0x00000000
	 * This page will just contain the system vectors and can be
	 * shared by all processes.
	 */
	alloc_pages(systempage.pv_pa, 1);

	/* Allocate stacks for all modes */
	valloc_pages(irqstack, IRQ_STACK_SIZE);
	valloc_pages(abtstack, ABT_STACK_SIZE);
	valloc_pages(undstack, UND_STACK_SIZE);
	valloc_pages(kernelstack, UPAGES);

	/* Allocate enough pages for cleaning the Mini-Data cache. */
	KASSERT(xscale_minidata_clean_size <= PAGE_SIZE);
	valloc_pages(minidataclean, 1);

#ifdef VERBOSE_INIT_ARM
	printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa,
	    irqstack.pv_va); 
	printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa,
	    abtstack.pv_va); 
	printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa,
	    undstack.pv_va); 
	printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa,
	    kernelstack.pv_va); 
#endif

	/*
	 * XXX Defer this to later so that we can reclaim the memory
	 * XXX used by the RedBoot page tables.
	 */
	alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE);

	/*
	 * Ok we have allocated physical pages for the primary kernel
	 * page tables
	 */

#ifdef VERBOSE_INIT_ARM
	printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa);
#endif

	/*
	 * Now we start construction of the L1 page table
	 * We start by mapping the L2 page tables into the L1.
	 * This means that we can replace L1 mappings later on if necessary
	 */
	l1pagetable = kernel_l1pt.pv_pa;

	/* Map the L2 pages tables in the L1 page table */
	pmap_link_l2pt(l1pagetable, 0x00000000,
	    &kernel_pt_table[KERNEL_PT_SYS]);
	for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++)
		pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000,
		    &kernel_pt_table[KERNEL_PT_KERNEL + loop]);
	for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++)
		pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000,
		    &kernel_pt_table[KERNEL_PT_VMDATA + loop]);

	/* update the top of the kernel VM */
	pmap_curmaxkvaddr =
	    KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000);

#ifdef VERBOSE_INIT_ARM
	printf("Mapping kernel\n");
#endif

	/* Now we fill in the L2 pagetable for the kernel static code/data */
	{
		extern char etext[], _end[];
		size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE;
		size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE;
		u_int logical;

		textsize = (textsize + PGOFSET) & ~PGOFSET;
		totalsize = (totalsize + PGOFSET) & ~PGOFSET;
		
		logical = 0x00200000;	/* offset of kernel in RAM */

		logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical,
		    physical_start + logical, textsize,
		    VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
		logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical,
		    physical_start + logical, totalsize - textsize,
		    VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
	}

#ifdef VERBOSE_INIT_ARM
	printf("Constructing L2 page tables\n");
#endif

	/* Map the stack pages */
	pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa,
	    IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
	pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa,
	    ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
	pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa,
	    UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
	pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa,
	    UPAGES * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE);

	pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa,
	    L1_TABLE_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_PAGETABLE);

	for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) {
		pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va,
		    kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE,
		    VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
	}

	/* Map the Mini-Data cache clean area. */
	xscale_setup_minidata(l1pagetable, minidataclean.pv_va,
	    minidataclean.pv_pa);

	/* Map the vector page. */
#if 1
	/* MULTI-ICE requires that page 0 is NC/NB so that it can download the
	 * cache-clean code there.  */
	pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa,
	    VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE);
#else
	pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa,
	    VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
#endif

	/*
	 * map integrated peripherals at same address in l1pagetable
	 * so that we can continue to use console.
	 */
	pmap_devmap_bootstrap(l1pagetable, viper_devmap);

	/*
	 * Give the XScale global cache clean code an appropriately
	 * sized chunk of unmapped VA space starting at 0xff000000
	 * (our device mappings end before this address).
	 */
	xscale_cache_clean_addr = 0xff000000U;

	/*
	 * Now we have the real page tables in place so we can switch to them.
	 * Once this is done we will be running with the REAL kernel page
	 * tables.
	 */

	/*
	 * Update the physical_freestart/physical_freeend/free_pages
	 * variables.
	 */
	{
		extern char _end[];

		physical_freestart = physical_start +
		    (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) -
		     KERNEL_BASE);
		physical_freeend = physical_end;
		free_pages =
		    (physical_freeend - physical_freestart) / PAGE_SIZE;
	}

	/* Switch tables */
#ifdef VERBOSE_INIT_ARM
	printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n",
	       physical_freestart, free_pages, free_pages);
	printf("switching to new L1 page table  @%#lx...", kernel_l1pt.pv_pa);
#endif

	cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT);
	setttb(kernel_l1pt.pv_pa);
	cpu_tlb_flushID();
	cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2));

	/*
	 * Moved from cpu_startup() as data_abort_handler() references
	 * this during uvm init
	 */
	proc0paddr = (struct user *)kernelstack.pv_va;
	lwp0.l_addr = proc0paddr;

#ifdef VERBOSE_INIT_ARM
	printf("bootstrap done.\n");
#endif

	arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL);

	/*
	 * Pages were allocated during the secondary bootstrap for the
	 * stacks for different CPU modes.
	 * We must now set the r13 registers in the different CPU modes to
	 * point to these stacks.
	 * Since the ARM stacks use STMFD etc. we must set r13 to the top end
	 * of the stack memory.
	 */
	printf("init subsystems: stacks ");

	set_stackptr(PSR_IRQ32_MODE, irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE);
	set_stackptr(PSR_ABT32_MODE, abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE);
	set_stackptr(PSR_UND32_MODE, undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE);

	/*
	 * Well we should set a data abort handler.
	 * Once things get going this will change as we will need a proper
	 * handler.
	 * Until then we will use a handler that just panics but tells us
	 * why.
	 * Initialisation of the vectors will just panic on a data abort.
	 * This just fills in a slightly better one.
	 */
	printf("vectors ");
	data_abort_handler_address = (u_int)data_abort_handler;
	prefetch_abort_handler_address = (u_int)prefetch_abort_handler;
	undefined_handler_address = (u_int)undefinedinstruction_bounce;

	/* Initialise the undefined instruction handlers */
	printf("undefined ");
	undefined_init();

	/* Load memory into UVM. */
	printf("page ");
	uvm_setpagesize();        /* initialize PAGE_SIZE-dependent variables */
	uvm_page_physload(atop(physical_freestart), atop(physical_freeend),
	    atop(physical_freestart), atop(physical_freeend),
	    VM_FREELIST_DEFAULT);

	/* Boot strap pmap telling it where the kernel page table is */
	printf("pmap ");
	pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE);

#ifdef __HAVE_MEMORY_DISK__
	md_root_setconf(memory_disk, sizeof memory_disk);
#endif

#ifdef KGDB
	if (boothowto & RB_KDB) {
		kgdb_debug_init = 1;
		kgdb_connect(1);
	}
#endif

#ifdef DDB
	db_machine_init();

	/* Firmware doesn't load symbols. */
	ddb_init(0, NULL, NULL);

	if (boothowto & RB_KDB)
		Debugger();
#endif

	/* We return the new stack pointer address */
	return(kernelstack.pv_va + USPACE_SVC_STACK_TOP);
}
コード例 #20
0
ファイル: machdep.c プロジェクト: MarginC/kame
/*
 * Do all the stuff that locore normally does before calling main().
 */
void
mach_init(int argc, char **argv, yamon_env_var *envp, u_long memsize)
{
	struct malta_config *mcp = &malta_configuration;
	bus_space_handle_t sh;
	caddr_t kernend, v;
        u_long first, last;
	vsize_t size;
	char *cp;
	int i, howto;
	uint8_t *brkres = (uint8_t *)MIPS_PHYS_TO_KSEG1(MALTA_BRKRES);

	extern char edata[], end[];

	*brkres = 0;	/* Disable BREAK==reset on console */

	/* Get the propaganda in early! */
	led_display_str("NetBSD");

	/*
	 * Clear the BSS segment.
	 */
	kernend = (caddr_t)mips_round_page(end);
	memset(edata, 0, kernend - edata);

	/* save the yamon environment pointer */
	yamon_envp = envp;

	/* Use YAMON callbacks for early console I/O */
	cn_tab = &yamon_promcd;

	/*
	 * Set up the exception vectors and cpu-specific function
	 * vectors early on.  We need the wbflush() vector set up
	 * before comcnattach() is called (or at least before the
	 * first printf() after that is called).
	 * Also clears the I+D caches.
	 */
	mips_vector_init();

	uvm_setpagesize();

	physmem = btoc(memsize);

	gt_pci_init(&mcp->mc_pc, &mcp->mc_gt);
	malta_bus_io_init(&mcp->mc_iot, mcp);
	malta_bus_mem_init(&mcp->mc_memt, mcp);
	malta_dma_init(mcp);

	/*
	 * Calibrate the timer, delay() relies on this.
	 */
	bus_space_map(&mcp->mc_iot, MALTA_RTCADR, 2, 0, &sh);
	malta_cal_timer(&mcp->mc_iot, sh);
	bus_space_unmap(&mcp->mc_iot, sh, 2);


#if NCOM > 0
	/*
	 * Delay to allow firmware putchars to complete.
	 * FIFO depth * character time.
	 * character time = (1000000 / (defaultrate / 10))
	 */
	delay(160000000 / comcnrate);
	if (comcnattach(&mcp->mc_iot, MALTA_UART0ADR, comcnrate, COM_FREQ,
	    (TTYDEF_CFLAG & ~(CSIZE | PARENB)) | CS8) != 0)
		panic("malta: unable to initialize serial console");
#else
	panic("malta: not configured to use serial console");
#endif /* NCOM > 0 */

	consinit();

	mem_clusters[0].start = 0;
	mem_clusters[0].size = ctob(physmem);
	mem_cluster_cnt = 1;

	/*
	 * XXX: check argv[0] - do something if "gdb"???
	 */

	/*
	 * Look at arguments passed to us and compute boothowto.
	 */
	boothowto = RB_AUTOBOOT;
	for (i = 1; i < argc; i++) {
		for (cp = argv[i]; *cp; cp++) {
			/* Ignore superfluous '-', if there is one */
			if (*cp == '-')
				continue;

			howto = 0;
			BOOT_FLAG(*cp, howto);
			if (! howto)
				printf("bootflag '%c' not recognised\n", *cp);
			else
				boothowto |= howto;
		}
	}

	/*
	 * Load the rest of the available pages into the VM system.
	 */
	first = round_page(MIPS_KSEG0_TO_PHYS(kernend));
	last = mem_clusters[0].start + mem_clusters[0].size;
	uvm_page_physload(atop(first), atop(last), atop(first), atop(last),
		VM_FREELIST_DEFAULT);

	/*
	 * Initialize error message buffer (at end of core).
	 */
	mips_init_msgbuf();

	/*
	 * Compute the size of system data structures.  pmap_bootstrap()
	 * needs some of this information.
	 */
	size = (vsize_t)allocsys(NULL, NULL);

	pmap_bootstrap();

	/*
	 * Allocate space for proc0's USPACE.
	 */
	v = (caddr_t)uvm_pageboot_alloc(USPACE); 
	proc0.p_addr = proc0paddr = (struct user *)v;
	proc0.p_md.md_regs = (struct frame *)(v + USPACE) - 1;
	curpcb = &proc0.p_addr->u_pcb;
	curpcb->pcb_context[11] = MIPS_INT_MASK | MIPS_SR_INT_IE; /* SR */

	/*
	 * Allocate space for system data structures.  These data structures
	 * are allocated here instead of cpu_startup() because physical
	 * memory is directly addressable.  We don't have to map these into
	 * virtual address space.
	 */
	v = (caddr_t)uvm_pageboot_alloc(size); 
	if ((allocsys(v, NULL) - v) != size)
		panic("mach_init: table size inconsistency");

	/*
	 * Initialize debuggers, and break into them, if appropriate.
	 */
#ifdef DDB
	ddb_init(0, 0, 0);
#endif

	if (boothowto & RB_KDB)
#if defined(DDB)
		Debugger();
#endif
}
コード例 #21
0
/*
 * u_int initarm(...)
 *
 * Initial entry point on startup. This gets called before main() is
 * entered.
 * It should be responsible for setting up everything that must be
 * in place when main is called.
 * This includes
 *   Taking a copy of the boot configuration structure.
 *   Initialising the physical console so characters can be printed.
 *   Setting up page tables for the kernel
 *   Relocating the kernel to the bottom of physical memory
 */
u_int
initarm(void *arg)
{
	extern char _end[];
	extern vaddr_t startup_pagetable;
	extern struct btinfo_common bootinfo;
	struct btinfo_common *btinfo = &bootinfo;
	struct btinfo_model *model = NULL;
	struct btinfo_memory *memory = NULL;
	struct btinfo_video *video = NULL;
	struct btinfo_bootargs *args = NULL;
	u_int l1pagetable, _end_physical;
	int loop, loop1, n, i;

	/*
	 * Heads up ... Setup the CPU / MMU / TLB functions
	 */
	if (set_cpufuncs())
		panic("cpu not recognized!");

	/* map some peripheral registers at static I/O area. */
	pmap_devmap_bootstrap(startup_pagetable, epoc32_devmap);

	bootconfig.dramblocks = 0;
	while (btinfo->type != BTINFO_NONE) {
		switch (btinfo->type) {
		case BTINFO_MODEL:
			model = (struct btinfo_model *)btinfo;
			btinfo = &(model + 1)->common;
			strncpy(epoc32_model, model->model,
			    sizeof(epoc32_model));
			break;

		case BTINFO_MEMORY:
			memory = (struct btinfo_memory *)btinfo;
			btinfo = &(memory + 1)->common;

			/*
			 * Fake bootconfig structure for the benefit of pmap.c
			 */
			i = bootconfig.dramblocks;
			bootconfig.dram[i].address = memory->address;
			bootconfig.dram[i].pages = memory->size / PAGE_SIZE;
			bootconfig.dramblocks++;
			break;

		case BTINFO_VIDEO:
			video = (struct btinfo_video *)btinfo;
			btinfo = &(video + 1)->common;
			epoc32_fb_width = video->width;
			epoc32_fb_height = video->height;
			break;

		case BTINFO_BOOTARGS:
			args = (struct btinfo_bootargs *)btinfo;
			btinfo = &(args + 1)->common;
			memcpy(bootargs, args->bootargs,
			    min(sizeof(bootargs), sizeof(args->bootargs)));
			bootargs[sizeof(bootargs) - 1] = '\0';
			boot_args = bootargs;
			break;

		default:
#define NEXT_BOOTINFO(bi) (struct btinfo_common *)((char *)bi + (bi)->len)

			btinfo = NEXT_BOOTINFO(btinfo);
		}
	}
	if (bootconfig.dramblocks == 0)
		panic("BTINFO_MEMORY not found");

	consinit();

	if (boot_args != NULL)
		parse_mi_bootargs(boot_args);

	physical_start = bootconfig.dram[0].address;
	physical_freestart = bootconfig.dram[0].address;
	physical_freeend = KERNEL_TEXT_BASE;

	free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE;

	/* Define a macro to simplify memory allocation */
#define valloc_pages(var, np)				\
	alloc_pages((var).pv_pa, (np));			\
	(var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start;

#define alloc_pages(var, np)				\
	physical_freeend -= ((np) * PAGE_SIZE);		\
	if (physical_freeend < physical_freestart)	\
		panic("initarm: out of memory");	\
	(var) = physical_freeend;			\
	free_pages -= (np);				\
	memset((char *)(var), 0, ((np) * PAGE_SIZE));

	loop1 = 0;
	for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) {
		/* Are we 16KB aligned for an L1 ? */
		if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0
		    && kernel_l1pt.pv_pa == 0) {
			valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE);
		} else {
			valloc_pages(kernel_pt_table[loop1],
			    L2_TABLE_SIZE / PAGE_SIZE);
			++loop1;
		}
	}

	/* This should never be able to happen but better confirm that. */
	if (!kernel_l1pt.pv_pa ||
	    (kernel_l1pt.pv_pa & (L1_TABLE_SIZE - 1)) != 0)
		panic("initarm: Failed to align the kernel page directory");

	/*
	 * Allocate a page for the system page mapped to V0x00000000
	 * This page will just contain the system vectors and can be
	 * shared by all processes.
	 */
	alloc_pages(systempage.pv_pa, 1);

	/* Allocate stacks for all modes */
	valloc_pages(irqstack, IRQ_STACK_SIZE);
	valloc_pages(abtstack, ABT_STACK_SIZE);
	valloc_pages(undstack, UND_STACK_SIZE);
	valloc_pages(kernelstack, UPAGES);

	alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE);

	/*
	 * Now we start construction of the L1 page table
	 * We start by mapping the L2 page tables into the L1.
	 * This means that we can replace L1 mappings later on if necessary
	 */
	l1pagetable = kernel_l1pt.pv_va;

	/* Map the L2 pages tables in the L1 page table */
	pmap_link_l2pt(l1pagetable, 0x00000000,
	    &kernel_pt_table[KERNEL_PT_SYS]);
	pmap_link_l2pt(l1pagetable, KERNEL_BASE,
	    &kernel_pt_table[KERNEL_PT_KERNEL]);

	/* update the top of the kernel VM */
	pmap_curmaxkvaddr = KERNEL_VM_BASE;

	/* Now we fill in the L2 pagetable for the kernel static code/data */
	{
		extern char etext[];
		size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE;
		size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE;
		size_t datasize;
		PhysMem *dram = bootconfig.dram;
		u_int logical, physical, size;

		textsize = (textsize + PGOFSET) & ~PGOFSET;
		totalsize = (totalsize + PGOFSET) & ~PGOFSET;
		datasize = totalsize - textsize;	/* data and bss */

		logical = KERNEL_OFFSET;	/* offset of kernel in RAM */
		physical = KERNEL_OFFSET;
		i = 0;
		size = dram[i].pages * PAGE_SIZE - physical;
		/* Map kernel text section. */
		while (1 /*CONSTINT*/) {
			size = pmap_map_chunk(l1pagetable,
			    KERNEL_BASE + logical, dram[i].address + physical,
			    textsize < size ? textsize : size,
			    VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
			logical += size;
			physical += size;
			textsize -= size;
			if (physical >= dram[i].pages * PAGE_SIZE) {
				i++;
				size = dram[i].pages * PAGE_SIZE;
				physical = 0;
			}
			if (textsize == 0)
				break;
		}
		size = dram[i].pages * PAGE_SIZE - physical;
		/* Map data and bss section. */
		while (1 /*CONSTINT*/) {
			size = pmap_map_chunk(l1pagetable,
			    KERNEL_BASE + logical, dram[i].address + physical,
			    datasize < size ? datasize : size,
			    VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
			logical += size;
			physical += size;
			datasize -= size;
			if (physical >= dram[i].pages * PAGE_SIZE) {
				i++;
				size = dram[i].pages * PAGE_SIZE;
				physical = 0;
			}
			if (datasize == 0)
				break;
		}
		_end_physical = dram[i].address + physical;
		n = i;
		physical_end = dram[n].address + dram[n].pages * PAGE_SIZE;
		n++;
	}

	/* Map the stack pages */
	pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa,
	    IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
	pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa,
	    ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
	pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa,
	    UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
	pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa,
	    UPAGES * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE);

        pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa,
	    L1_TABLE_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_PAGETABLE);

	for (loop = 0; loop < NUM_KERNEL_PTS; ++loop)
		pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va,
		    kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE,
		    VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);

	/* Map the vector page. */
	pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa,
	    VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);

	pmap_devmap_bootstrap(l1pagetable, epoc32_devmap);
	pmap_devmap_bootstrap(l1pagetable, epoc32_fb_devmap);
	epoc32_fb_addr = ARM7XX_FB_VBASE;

	/*
	 * Now we have the real page tables in place so we can switch to them.
	 * Once this is done we will be running with the REAL kernel page
	 * tables.
	 */

	/* Switch tables */
	cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT);
	cpu_setttb(kernel_l1pt.pv_pa, true);
	cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2));

	/*
	 * Moved from cpu_startup() as data_abort_handler() references
	 * this during uvm init
	 */
	uvm_lwp_setuarea(&lwp0, kernelstack.pv_va);

	arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL);

	/*
	 * Pages were allocated during the secondary bootstrap for the
	 * stacks for different CPU modes.
	 * We must now set the r13 registers in the different CPU modes to
	 * point to these stacks.
	 * Since the ARM stacks use STMFD etc. we must set r13 to the top end
	 * of the stack memory.
	 */

	set_stackptr(PSR_IRQ32_MODE,
	    irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE);
	set_stackptr(PSR_ABT32_MODE,
	    abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE);
	set_stackptr(PSR_UND32_MODE,
	    undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE);

	/*
	 * Well we should set a data abort handler.
	 * Once things get going this will change as we will need a proper
	 * handler. Until then we will use a handler that just panics but
	 * tells us why.
	 * Initialisation of the vectors will just panic on a data abort.
	 * This just fills in a slightly better one.
	 */
	data_abort_handler_address = (u_int)data_abort_handler;
	prefetch_abort_handler_address = (u_int)prefetch_abort_handler;
	undefined_handler_address = (u_int)undefinedinstruction_bounce;

	/* Initialise the undefined instruction handlers */
	undefined_init();

        /* Load memory into UVM. */
	uvm_setpagesize();	/* initialize PAGE_SIZE-dependent variables */
	uvm_page_physload(
	    atop(_end_physical), atop(physical_end),
	    atop(_end_physical), atop(physical_end),
	    VM_FREELIST_DEFAULT);
	physmem = bootconfig.dram[0].pages;
	for (i = 1; i < n; i++)
		physmem += bootconfig.dram[i].pages;
	if (physmem < 0x400000)
		physical_end = 0;
	for (loop = n; loop < bootconfig.dramblocks; loop++) {
		size_t start = bootconfig.dram[loop].address;
		size_t size = bootconfig.dram[loop].pages * PAGE_SIZE;

		uvm_page_physload(atop(start), atop(start + size),
		    atop(start), atop(start + size), VM_FREELIST_DEFAULT);
		physmem += bootconfig.dram[loop].pages;

		if (physical_end == 0 && physmem >= 0x400000 / PAGE_SIZE)
			/* Fixup physical_end for Series5. */
			physical_end = start + size;
	}

	/* Boot strap pmap telling it where the kernel page table is */
	pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE);

#ifdef __HAVE_MEMORY_DISK__
	md_root_setconf(memory_disk, sizeof memory_disk);
#endif

#if NKSYMS || defined(DDB) || defined(MODULAR)
	/* Firmware doesn't load symbols. */
	ddb_init(0, NULL, NULL);
#endif

#ifdef DDB
	db_machine_init();
	if (boothowto & RB_KDB)
		Debugger();
#endif

	/* We return the new stack pointer address */
	return kernelstack.pv_va + USPACE_SVC_STACK_TOP;
}
コード例 #22
0
ファイル: machdep.c プロジェクト: lacombar/netbsd-alc
void
mach_init(int argc, char **argv, yamon_env_var *envp, u_long memsize)
{
	bus_space_handle_t sh;
	void *kernend;
	const char *cp;
	u_long first, last;
	void *v;
	int freqok, howto, i;
	const struct alchemy_board *board;

	extern char edata[], end[];	/* XXX */

	board = board_info();
	KASSERT(board != NULL);

	/* clear the BSS segment */
	kernend = (void *)mips_round_page(end);
	memset(edata, 0, (char *)kernend - edata);

	/* set CPU model info for sysctl_hw */
	strcpy(cpu_model, board->ab_name);

	/* save the yamon environment pointer */
	yamon_envp = envp;

	/* Use YAMON callbacks for early console I/O */
	cn_tab = &yamon_promcd;

	/*
	 * Set up the exception vectors and CPU-specific function
	 * vectors early on.  We need the wbflush() vector set up
	 * before comcnattach() is called (or at least before the
	 * first printf() after that is called).
	 * Sets up mips_cpu_flags that may be queried by other
	 * functions called during startup.
	 * Also clears the I+D caches.
	 */
	mips_vector_init();

	/*
	 * Set the VM page size.
	 */
	uvm_setpagesize();

	/*
	 * Use YAMON's CPU frequency if available.
	 */
	freqok = yamon_setcpufreq(1);

	/*
	 * Initialize bus space tags.
	 */
	au_cpureg_bus_mem_init(&alchemy_cpuregt, &alchemy_cpuregt);
	aubus_st = &alchemy_cpuregt;

	/*
	 * Calibrate the timer if YAMON failed to tell us.
	 */
	if (!freqok) {
		bus_space_map(aubus_st, PC_BASE, PC_SIZE, 0, &sh);
		au_cal_timers(aubus_st, sh);
		bus_space_unmap(aubus_st, sh, PC_SIZE);
	}

	/*
	 * Perform board-specific initialization.
	 */
	board->ab_init();

	/*
	 * Bring up the console.
	 */
#if NCOM > 0
#ifdef CONSPEED
	if (aucomcnrate == 0)
		aucomcnrate = CONSPEED;
#else /* !CONSPEED */
	/*
	 * Learn default console speed.  We use the YAMON environment,
	 * though we could probably also figure it out by checking the
	 * aucom registers directly.
	 */
	if ((aucomcnrate == 0) && ((cp = yamon_getenv("modetty0")) != NULL))
		aucomcnrate = strtoul(cp, NULL, 0);

	if (aucomcnrate == 0) {
		printf("FATAL: `modetty0' YAMON variable not set.  Set it\n");
		printf("       to the speed of the console and try again.\n");
		printf("       Or, build a kernel with the `CONSPEED' "
		    "option.\n");
		panic("mach_init");
	}
#endif /* CONSPEED */

	/*
	 * Delay to allow firmware putchars to complete.
	 * FIFO depth * character time.
	 * character time = (1000000 / (defaultrate / 10))
	 */
	delay(160000000 / aucomcnrate);
	if (com_aubus_cnattach(UART0_BASE, aucomcnrate) != 0)
		panic("mach_init: unable to initialize serial console");

#else /* NCOM > 0 */
	panic("mach_init: not configured to use serial console");
#endif /* NAUCOM > 0 */

	/*
	 * Look at arguments passed to us and compute boothowto.
	 */
	boothowto = RB_AUTOBOOT;
#ifdef KADB
	boothowto |= RB_KDB;
#endif
	for (i = 1; i < argc; i++) {
		for (cp = argv[i]; *cp; cp++) {
			/* Ignore superfluous '-', if there is one */
			if (*cp == '-')
				continue;

			howto = 0;
			BOOT_FLAG(*cp, howto);
			if (! howto)
				printf("bootflag '%c' not recognised\n", *cp);
			else
				boothowto |= howto;
		}
	}

	/*
	 * Determine the memory size.  Use the `memsize' PMON
	 * variable.  If that's not available, panic.
	 *
	 * Note: Reserve the first page!  That's where the trap
	 * vectors are located.
	 */

#if defined(MEMSIZE)
	memsize = MEMSIZE;
#else
	if (memsize == 0) {
		if ((cp = yamon_getenv("memsize")) != NULL)
			memsize = strtoul(cp, NULL, 0);
		else {
			printf("FATAL: `memsize' YAMON variable not set.  Set it to\n");
			printf("       the amount of memory (in MB) and try again.\n");
			printf("       Or, build a kernel with the `MEMSIZE' "
			    "option.\n");
			panic("mach_init");
		}
	}
#endif /* MEMSIZE */
	printf("Memory size: 0x%08lx\n", memsize);
	physmem = btoc(memsize);

	mem_clusters[mem_cluster_cnt].start = PAGE_SIZE;
	mem_clusters[mem_cluster_cnt].size =
	    memsize - mem_clusters[mem_cluster_cnt].start;
	mem_cluster_cnt++;

	/*
	 * Load the rest of the available pages into the VM system.
	 */
	first = round_page(MIPS_KSEG0_TO_PHYS(kernend));
	last = mem_clusters[0].start + mem_clusters[0].size;
	uvm_page_physload(atop(first), atop(last), atop(first), atop(last),
	    VM_FREELIST_DEFAULT);

	/*
	 * Initialize message buffer (at end of core).
	 */
	mips_init_msgbuf();

	/*
	 * Initialize the virtual memory system.
	 */
	pmap_bootstrap();

	/*
	 * Init mapping for u page(s) for proc0.
	 */
	v = (void *) uvm_pageboot_alloc(USPACE);
	lwp0.l_addr = proc0paddr = (struct user *)v;
	lwp0.l_md.md_regs = (struct frame *)((char *)v + USPACE) - 1;
	proc0paddr->u_pcb.pcb_context[11] =
	    MIPS_INT_MASK | MIPS_SR_INT_IE; /* SR */

	/*
	 * Initialize debuggers, and break into them, if appropriate.
	 */
#if NKSYMS || defined(DDB) || defined(LKM)
	ksyms_init(0, 0, 0);
#endif
#ifdef DDB
	if (boothowto & RB_KDB)
		Debugger();
#endif
}
コード例 #23
0
ファイル: machdep.c プロジェクト: genua/anoubis_os
caddr_t
mips_init(int argc, void *argv, caddr_t boot_esym)
{
	char *cp;
	int i;
	caddr_t sd;
	u_int cputype;
	vaddr_t tlb_handler, xtlb_handler;
	extern char start[], edata[], end[];
	extern char exception[], e_exception[];
	extern char *hw_vendor, *hw_prod;
	extern void tlb_miss;
	extern void tlb_miss_err_r5k;
	extern void xtlb_miss;
	extern void xtlb_miss_err_r5k;

	/*
	 * Make sure we can access the extended address space.
	 * Note that r10k and later do not allow XUSEG accesses
	 * from kernel mode unless SR_UX is set.
	 */
	setsr(getsr() | SR_KX | SR_UX);

#ifdef notyet
	/*
	 * Make sure KSEG0 cacheability match what we intend to use.
	 *
	 * XXX This does not work as expected on IP30. Does ARCBios
	 * XXX depend on this?
	 */
	cp0_setcfg((cp0_getcfg() & ~0x07) | CCA_CACHED);
#endif

	/*
	 * Clear the compiled BSS segment in OpenBSD code.
	 */
	bzero(edata, end - edata);

	/*
	 * Reserve space for the symbol table, if it exists.
	 */
	ssym = (char *)*(u_int64_t *)end;

	/* Attempt to locate ELF header and symbol table after kernel. */
	if (end[0] == ELFMAG0 && end[1] == ELFMAG1 &&
	    end[2] == ELFMAG2 && end[3] == ELFMAG3 ) {

		/* ELF header exists directly after kernel. */
		ssym = end;
		esym = boot_esym;
		ekern = esym;

	} else if (((long)ssym - (long)end) >= 0 &&
	    ((long)ssym - (long)end) <= 0x1000 &&
	    ssym[0] == ELFMAG0 && ssym[1] == ELFMAG1 &&
	    ssym[2] == ELFMAG2 && ssym[3] == ELFMAG3 ) {

		/* Pointers exist directly after kernel. */
		esym = (char *)*((u_int64_t *)end + 1);
		ekern = esym;

	} else {

		/* Pointers aren't setup either... */
		ssym = NULL;
		esym = NULL;
		ekern = end;
	}

	/*
	 * Initialize the system type and set up memory layout.
	 * Note that some systems have a more complex memory setup.
	 */
	bios_ident();

	/*
	 * Determine system type and set up configuration record data.
	 */
	hw_vendor = "SGI";
	switch (sys_config.system_type) {
#if defined(TGT_O2)
	case SGI_O2:
		bios_printf("Found SGI-IP32, setting up.\n");
		hw_prod = "O2";
		strlcpy(cpu_model, "IP32", sizeof(cpu_model));
		ip32_setup();

		sys_config.cpu[0].clock = 180000000;  /* Reasonable default */
		cp = Bios_GetEnvironmentVariable("cpufreq");
		if (cp && atoi(cp, 10, NULL) > 100)
			sys_config.cpu[0].clock = atoi(cp, 10, NULL) * 1000000;

		break;
#endif

#if defined(TGT_ORIGIN200) || defined(TGT_ORIGIN2000)
	case SGI_O200:
		bios_printf("Found SGI-IP27, setting up.\n");
		hw_prod = "Origin 200";
		strlcpy(cpu_model, "IP27", sizeof(cpu_model));
		ip27_setup();

		break;

	case SGI_O300:
		bios_printf("Found SGI-IP35, setting up.\n");
		hw_prod = "Origin 300";
		/* IP27 is intentional, we use the same kernel */
		strlcpy(cpu_model, "IP27", sizeof(cpu_model));
		ip27_setup();

		break;
#endif

#if defined(TGT_OCTANE)
	case SGI_OCTANE:
		bios_printf("Found SGI-IP30, setting up.\n");
		hw_prod = "Octane";
		strlcpy(cpu_model, "IP30", sizeof(cpu_model));
		ip30_setup();

		sys_config.cpu[0].clock = 175000000;  /* Reasonable default */
		cp = Bios_GetEnvironmentVariable("cpufreq");
		if (cp && atoi(cp, 10, NULL) > 100)
			sys_config.cpu[0].clock = atoi(cp, 10, NULL) * 1000000;

		break;
#endif

	default:
		bios_printf("Kernel doesn't support this system type!\n");
		bios_printf("Halting system.\n");
		Bios_Halt();
		while(1);
	}

	/*
	 * Read and store console type.
	 */
	cp = Bios_GetEnvironmentVariable("ConsoleOut");
	if (cp != NULL && *cp != '\0')
		strlcpy(bios_console, cp, sizeof bios_console);

	/* Disable serial console if ARCS is telling us to use video. */
	if (strncmp(bios_console, "video", 5) == 0)
		comconsaddr = 0;

	/*
	 * Look at arguments passed to us and compute boothowto.
	 */
	boothowto = RB_AUTOBOOT;

	dobootopts(argc, argv);

	/*
	 * Figure out where we supposedly booted from.
	 */
	cp = Bios_GetEnvironmentVariable("OSLoadPartition");
	if (cp == NULL)
		cp = "unknown";
	if (strlcpy(osloadpartition, cp, sizeof osloadpartition) >=
	    sizeof osloadpartition)
		bios_printf("Value of `OSLoadPartition' is too large.\n"
		 "The kernel might not be able to find out its root device.\n");

	/*
	 * Read platform-specific environment variables.
	 */
	switch (sys_config.system_type) {
#if defined(TGT_O2)
	case SGI_O2:
		/* Get Ethernet address from ARCBIOS. */
		cp = Bios_GetEnvironmentVariable("eaddr");
		if (cp != NULL && strlen(cp) > 0)
			strlcpy(bios_enaddr, cp, sizeof bios_enaddr);
		break;
#endif
	default:
		break;
	}

	/*
	 * Set pagesize to enable use of page macros and functions.
	 * Commit available memory to UVM system.
	 */
	uvmexp.pagesize = PAGE_SIZE;
	uvm_setpagesize();

	for (i = 0; i < MAXMEMSEGS && mem_layout[i].mem_first_page != 0; i++) {
		u_int32_t fp, lp;
		u_int32_t firstkernpage, lastkernpage;
		unsigned int freelist;
		paddr_t firstkernpa, lastkernpa;

		if (IS_XKPHYS((vaddr_t)start))
			firstkernpa = XKPHYS_TO_PHYS((vaddr_t)start);
		else
			firstkernpa = KSEG0_TO_PHYS((vaddr_t)start);
		if (IS_XKPHYS((vaddr_t)ekern))
			lastkernpa = XKPHYS_TO_PHYS((vaddr_t)ekern);
		else
			lastkernpa = KSEG0_TO_PHYS((vaddr_t)ekern);

		firstkernpage = atop(trunc_page(firstkernpa));
		lastkernpage = atop(round_page(lastkernpa));

		fp = mem_layout[i].mem_first_page;
		lp = mem_layout[i].mem_last_page;
		freelist = mem_layout[i].mem_freelist;

		/* Account for kernel and kernel symbol table. */
		if (fp >= firstkernpage && lp < lastkernpage)
			continue;	/* In kernel. */

		if (lp < firstkernpage || fp > lastkernpage) {
			uvm_page_physload(fp, lp, fp, lp, freelist);
			continue;	/* Outside kernel. */
		}

		if (fp >= firstkernpage)
			fp = lastkernpage;
		else if (lp < lastkernpage)
			lp = firstkernpage;
		else { /* Need to split! */
			u_int32_t xp = firstkernpage;
			uvm_page_physload(fp, xp, fp, xp, freelist);
			fp = lastkernpage;
		}
		if (lp > fp)
			uvm_page_physload(fp, lp, fp, lp, freelist);
	}


	switch (sys_config.system_type) {
#if defined(TGT_O2) || defined(TGT_OCTANE)
	case SGI_O2:
	case SGI_OCTANE:
		sys_config.cpu[0].type = (cp0_get_prid() >> 8) & 0xff;
		sys_config.cpu[0].vers_maj = (cp0_get_prid() >> 4) & 0x0f;
		sys_config.cpu[0].vers_min = cp0_get_prid() & 0x0f;
		sys_config.cpu[0].fptype = (cp1_get_prid() >> 8) & 0xff;
		sys_config.cpu[0].fpvers_maj = (cp1_get_prid() >> 4) & 0x0f;
		sys_config.cpu[0].fpvers_min = cp1_get_prid() & 0x0f;

		/*
		 * Configure TLB.
		 */
		switch(sys_config.cpu[0].type) {
		case MIPS_RM7000:
			/* Rev A (version >= 2) CPU's have 64 TLB entries. */
			if (sys_config.cpu[0].vers_maj < 2) {
				sys_config.cpu[0].tlbsize = 48;
			} else {
				sys_config.cpu[0].tlbsize = 64;
			}
			break;

		case MIPS_R10000:
		case MIPS_R12000:
		case MIPS_R14000:
			sys_config.cpu[0].tlbsize = 64;
			break;

		default:
			sys_config.cpu[0].tlbsize = 48;
			break;
		}
		break;
#endif
	default:
		break;
	}

	/*
	 * Configure cache.
	 */
	switch(sys_config.cpu[0].type) {
	case MIPS_R10000:
	case MIPS_R12000:
	case MIPS_R14000:
		cputype = MIPS_R10000;
		break;
	case MIPS_R5000:
	case MIPS_RM7000:
	case MIPS_RM52X0:
	case MIPS_RM9000:
		cputype = MIPS_R5000;
		break;
	default:
		/*
		 * If we can't identify the cpu type, it must be
		 * r10k-compatible on Octane and Origin families, and
		 * it is likely to be r5k-compatible on O2.
		 */
		switch (sys_config.system_type) {
		case SGI_O2:
			cputype = MIPS_R5000;
			break;
		default:
		case SGI_OCTANE:
		case SGI_O200:
		case SGI_O300:
			cputype = MIPS_R10000;
			break;
		}
		break;
	}
	switch (cputype) {
	case MIPS_R10000:
		Mips10k_ConfigCache();
		sys_config._SyncCache = Mips10k_SyncCache;
		sys_config._InvalidateICache = Mips10k_InvalidateICache;
		sys_config._InvalidateICachePage = Mips10k_InvalidateICachePage;
		sys_config._SyncDCachePage = Mips10k_SyncDCachePage;
		sys_config._HitSyncDCache = Mips10k_HitSyncDCache;
		sys_config._IOSyncDCache = Mips10k_IOSyncDCache;
		sys_config._HitInvalidateDCache = Mips10k_HitInvalidateDCache;
		break;
	default:
	case MIPS_R5000:
		Mips5k_ConfigCache();
		sys_config._SyncCache = Mips5k_SyncCache;
		sys_config._InvalidateICache = Mips5k_InvalidateICache;
		sys_config._InvalidateICachePage = Mips5k_InvalidateICachePage;
		sys_config._SyncDCachePage = Mips5k_SyncDCachePage;
		sys_config._HitSyncDCache = Mips5k_HitSyncDCache;
		sys_config._IOSyncDCache = Mips5k_IOSyncDCache;
		sys_config._HitInvalidateDCache = Mips5k_HitInvalidateDCache;
		break;
	}

	/*
	 * Last chance to call the BIOS. Wiping the TLB means the BIOS' data
	 * areas are demapped on most systems.
	 */
	delay(20*1000);		/* Let any UART FIFO drain... */

	sys_config.cpu[0].tlbwired = UPAGES / 2;
	tlb_set_wired(0);
	tlb_flush(sys_config.cpu[0].tlbsize);
	tlb_set_wired(sys_config.cpu[0].tlbwired);

	/*
	 * Get a console, very early but after initial mapping setup.
	 */
	consinit();
	printf("Initial setup done, switching console.\n");

	/*
	 * Init message buffer.
	 */
	msgbufbase = (caddr_t)pmap_steal_memory(MSGBUFSIZE, NULL,NULL);
	initmsgbuf(msgbufbase, MSGBUFSIZE);

	/*
	 * Allocate U page(s) for proc[0], pm_tlbpid 1.
	 */
	proc0.p_addr = proc0paddr = curprocpaddr =
	    (struct user *)pmap_steal_memory(USPACE, NULL, NULL);
	proc0.p_md.md_regs = (struct trap_frame *)&proc0paddr->u_pcb.pcb_regs;
	tlb_set_pid(1);

	/*
	 * Allocate system data structures.
	 */
	i = (vsize_t)allocsys(NULL);
	sd = (caddr_t)pmap_steal_memory(i, NULL, NULL);
	allocsys(sd);

	/*
	 * Bootstrap VM system.
	 */
	pmap_bootstrap();

	/*
	 * Copy down exception vector code.
	 */
	bcopy(exception, (char *)CACHE_ERR_EXC_VEC, e_exception - exception);
	bcopy(exception, (char *)GEN_EXC_VEC, e_exception - exception);

	/*
	 * Build proper TLB refill handler trampolines.
	 */
	switch (cputype) {
	case MIPS_R5000:
		/*
		 * R5000 processors need a specific chip bug workaround
		 * in their tlb handlers.  Theoretically only revision 1
		 * of the processor need it, but there is evidence
		 * later versions also need it.
		 *
		 * This is also necessary on RM52x0; we test on the `rounded'
		 * cputype value instead of sys_config.cpu[0].type; this
		 * causes RM7k and RM9k to be included, just to be on the
		 * safe side.
		 */
		tlb_handler = (vaddr_t)&tlb_miss_err_r5k;
		xtlb_handler = (vaddr_t)&xtlb_miss_err_r5k;
		break;
	default:
		tlb_handler = (vaddr_t)&tlb_miss;
		xtlb_handler = (vaddr_t)&xtlb_miss;
		break;
	}

	build_trampoline(TLB_MISS_EXC_VEC, tlb_handler);
	build_trampoline(XTLB_MISS_EXC_VEC, xtlb_handler);

	/*
	 * Turn off bootstrap exception vectors.
	 */
	setsr(getsr() & ~SR_BOOT_EXC_VEC);
	proc0.p_md.md_regs->sr = getsr();

	/*
	 * Clear out the I and D caches.
	 */
	Mips_SyncCache();

#ifdef DDB
	db_machine_init();
	if (boothowto & RB_KDB)
		Debugger();
#endif

	/*
	 * Return new stack pointer.
	 */
	return ((caddr_t)proc0paddr + USPACE - 64);
}
コード例 #24
0
/*
 * Initial entry point on startup. This gets called before main() is
 * entered.
 * It should be responsible for setting up everything that must be
 * in place when main is called.
 * This includes
 *   Taking a copy of the boot configuration structure.
 *   Initialising the physical console so characters can be printed.
 *   Setting up page tables for the kernel
 *   Relocating the kernel to the bottom of physical memory
 */
u_int
initarm(void *arg)
{
        int loop;
	int loop1;
	u_int kerneldatasize, symbolsize;
	vaddr_t l1pagetable;
	vaddr_t freemempos;
#if NKSYMS || defined(DDB) || defined(MODULAR)
        Elf_Shdr *sh;
#endif

	cpu_reset_address = ixp12x0_reset;

        /*
         * Since we map v0xf0000000 == p0x90000000, it's possible for
         * us to initialize the console now.
         */
	consinit();

#ifdef VERBOSE_INIT_ARM
	/* Talk to the user */
	printf("\nNetBSD/evbarm (IXM1200) booting ...\n");
#endif

	/*
	 * Heads up ... Setup the CPU / MMU / TLB functions
	 */
	if (set_cpufuncs())
		panic("CPU not recognized!");

	/* XXX overwrite bootconfig to hardcoded values */
	bootconfig.dram[0].address = 0xc0000000;
	bootconfig.dram[0].pages   = 0x10000000 / PAGE_SIZE; /* SDRAM 256MB */
	bootconfig.dramblocks = 1;

	kerneldatasize = (uint32_t)&end - (uint32_t)KERNEL_TEXT_BASE;

	symbolsize = 0;

#ifdef PMAP_DEBUG
	pmap_debug(-1);
#endif

#if NKSYMS || defined(DDB) || defined(MODULAR)
        if (! memcmp(&end, "\177ELF", 4)) {
                sh = (Elf_Shdr *)((char *)&end + ((Elf_Ehdr *)&end)->e_shoff);
                loop = ((Elf_Ehdr *)&end)->e_shnum;
                for(; loop; loop--, sh++)
                        if (sh->sh_offset > 0 &&
                            (sh->sh_offset + sh->sh_size) > symbolsize)
                                symbolsize = sh->sh_offset + sh->sh_size;
        }
#endif
#ifdef VERBOSE_INIT_ARM
	printf("kernsize=0x%x\n", kerneldatasize);
#endif
	kerneldatasize += symbolsize;
	kerneldatasize = ((kerneldatasize - 1) & ~(PAGE_SIZE * 4 - 1)) + PAGE_SIZE * 8;

	/*
	 * Set up the variables that define the availablilty of physcial
	 * memory
	 */
	physical_start = bootconfig.dram[0].address;
	physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE);

	physical_freestart = physical_start
		+ (KERNEL_TEXT_BASE - KERNEL_BASE) + kerneldatasize;
	physical_freeend = physical_end;

	physmem = (physical_end - physical_start) / PAGE_SIZE;

	freemempos = 0xc0000000;

#ifdef VERBOSE_INIT_ARM
	printf("Allocating page tables\n");
#endif
	free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE;

#ifdef VERBOSE_INIT_ARM
	printf("CP15 Register1 = 0x%08x\n", cpu_get_control());
	printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n",
		physical_freestart, free_pages, free_pages);
	printf("physical_start = 0x%08lx, physical_end = 0x%08lx\n",
		physical_start, physical_end);
#endif

	/* Define a macro to simplify memory allocation */
#define valloc_pages(var, np)			\
	alloc_pages((var).pv_pa, (np));		\
	(var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start;
#define alloc_pages(var, np)				\
	(var) = freemempos;				\
	memset((char *)(var), 0, ((np) * PAGE_SIZE));	\
	freemempos += (np) * PAGE_SIZE;

	loop1 = 0;
	for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) {
		/* Are we 16KB aligned for an L1 ? */
		if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0
		    && kernel_l1pt.pv_pa == 0) {
			valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE);
		} else {
			valloc_pages(kernel_pt_table[loop1],
			    L2_TABLE_SIZE / PAGE_SIZE);
			++loop1;
		}
	}

#ifdef DIAGNOSTIC
	/* This should never be able to happen but better confirm that. */
	if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0)
		panic("initarm: Failed to align the kernel page directory");
#endif

	/*
	 * Allocate a page for the system page mapped to V0x00000000
	 * This page will just contain the system vectors and can be
	 * shared by all processes.
	 */
	alloc_pages(systempage.pv_pa, 1);

	/* Allocate stacks for all modes */
	valloc_pages(irqstack, IRQ_STACK_SIZE);
	valloc_pages(abtstack, ABT_STACK_SIZE);
	valloc_pages(undstack, UND_STACK_SIZE);
	valloc_pages(kernelstack, UPAGES);

#ifdef VERBOSE_INIT_ARM
	printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, irqstack.pv_va); 
	printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, abtstack.pv_va); 
	printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, undstack.pv_va); 
	printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, kernelstack.pv_va); 
#endif

	alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE);

#ifdef CPU_IXP12X0
        /*
         * XXX totally stuffed hack to work round problems introduced
         * in recent versions of the pmap code. Due to the calls used there
         * we cannot allocate virtual memory during bootstrap.
         */
	for(;;) {
		alloc_pages(ixp12x0_cc_base, 1);
		if (! (ixp12x0_cc_base & (CPU_IXP12X0_CACHE_CLEAN_SIZE - 1)))
			break;
	}
	{
		vaddr_t dummy;
		alloc_pages(dummy, CPU_IXP12X0_CACHE_CLEAN_SIZE / PAGE_SIZE - 1);
	}
	ixp12x0_cache_clean_addr = ixp12x0_cc_base;
	ixp12x0_cache_clean_size = CPU_IXP12X0_CACHE_CLEAN_SIZE / 2;
#endif /* CPU_IXP12X0 */

#ifdef VERBOSE_INIT_ARM
	printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa);
#endif

	/*
	 * Now we start construction of the L1 page table
	 * We start by mapping the L2 page tables into the L1.
	 * This means that we can replace L1 mappings later on if necessary
	 */
	l1pagetable = kernel_l1pt.pv_pa;

	/* Map the L2 pages tables in the L1 page table */
	pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1),
	    &kernel_pt_table[KERNEL_PT_SYS]);

	for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++)
		pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000,
		    &kernel_pt_table[KERNEL_PT_KERNEL + loop]);

	for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++)
		pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000,
		    &kernel_pt_table[KERNEL_PT_VMDATA + loop]);

	/* update the top of the kernel VM */
	pmap_curmaxkvaddr =
	    KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000);

	pmap_link_l2pt(l1pagetable, IXP12X0_IO_VBASE,
	    &kernel_pt_table[KERNEL_PT_IO]);

#ifdef VERBOSE_INIT_ARM
	printf("Mapping kernel\n");
#endif

#if XXX
	/* Now we fill in the L2 pagetable for the kernel code/data */
	{
		extern char etext[], _end[];
		size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE;
		size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE;
		u_int logical;

		textsize = (textsize + PGOFSET) & ~PGOFSET;
		totalsize = (totalsize + PGOFSET) & ~PGOFSET;
                
		logical = 0x00200000;   /* offset of kernel in RAM */

		logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical,
		    physical_start + logical, textsize,
		    VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
		logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical,
		    physical_start + logical, totalsize - textsize,
		    VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
	}
#else
	{
		pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE,
                    KERNEL_TEXT_BASE, kerneldatasize,
                    VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
	}
#endif

#ifdef VERBOSE_INIT_ARM
        printf("Constructing L2 page tables\n");
#endif

	/* Map the stack pages */
	pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa,
	    IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
	pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa,
	    ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
	pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa,
	    UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
	pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa,
	    UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);

	pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa,
	    L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);

	for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) {
		pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va,
		    kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE,
		    VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
	}

	/* Map the vector page. */
	pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa,
	    VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);

#ifdef VERBOSE_INIT_ARM
	printf("systempage (vector page): p0x%08lx v0x%08lx\n",
	       systempage.pv_pa, vector_page);
#endif

	/* Map the statically mapped devices. */
	pmap_devmap_bootstrap(l1pagetable, ixm1200_devmap);

#ifdef VERBOSE_INIT_ARM
	printf("done.\n");
#endif

	/*
	 * Map the Dcache Flush page.
	 * Hw Ref Manual 3.2.4.5 Software Dcache Flush 
	 */
	pmap_map_chunk(l1pagetable, ixp12x0_cache_clean_addr, 0xe0000000,
	    CPU_IXP12X0_CACHE_CLEAN_SIZE, VM_PROT_READ, PTE_CACHE);

	/*
	 * Now we have the real page tables in place so we can switch to them.
	 * Once this is done we will be running with the REAL kernel page
	 * tables.
	 */

	/* Switch tables */
	cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT);
	cpu_setttb(kernel_l1pt.pv_pa, true);
	cpu_tlb_flushID();
	cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2));

	/*
	 * Moved here from cpu_startup() as data_abort_handler() references
	 * this during init
	 */
	uvm_lwp_setuarea(&lwp0, kernelstack.pv_va);

	/*
	 * We must now clean the cache again....
	 * Cleaning may be done by reading new data to displace any
	 * dirty data in the cache. This will have happened in cpu_setttb()
	 * but since we are boot strapping the addresses used for the read
	 * may have just been remapped and thus the cache could be out
	 * of sync. A re-clean after the switch will cure this.
	 * After booting there are no gross reloations of the kernel thus
	 * this problem will not occur after initarm().
	 */
	cpu_idcache_wbinv_all();

	arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL);

	/*
	 * Pages were allocated during the secondary bootstrap for the
	 * stacks for different CPU modes.
	 * We must now set the r13 registers in the different CPU modes to
	 * point to these stacks.
	 * Since the ARM stacks use STMFD etc. we must set r13 to the top end
	 * of the stack memory.
	 */
#ifdef VERBOSE_INIT_ARM
	printf("init subsystems: stacks ");
#endif

	set_stackptr(PSR_IRQ32_MODE,
	    irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE);
	set_stackptr(PSR_ABT32_MODE,
	    abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE);
	set_stackptr(PSR_UND32_MODE,
	    undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE);
#ifdef PMAP_DEBUG
	if (pmap_debug_level >= 0)
		printf("kstack V%08lx P%08lx\n", kernelstack.pv_va,
		    kernelstack.pv_pa);
#endif  /* PMAP_DEBUG */

	/*
	 * Well we should set a data abort handler.
	 * Once things get going this will change as we will need a proper
	 * handler. Until then we will use a handler that just panics but
	 * tells us why.
	 * Initialisation of the vetcors will just panic on a data abort.
	 * This just fills in a slightly better one.
	 */
#ifdef VERBOSE_INIT_ARM
	printf("vectors ");
#endif
	data_abort_handler_address = (u_int)data_abort_handler;
	prefetch_abort_handler_address = (u_int)prefetch_abort_handler;
	undefined_handler_address = (u_int)undefinedinstruction_bounce;
#ifdef VERBOSE_INIT_ARM
	printf("\ndata_abort_handler_address = %08x\n", data_abort_handler_address);
	printf("prefetch_abort_handler_address = %08x\n", prefetch_abort_handler_address);
	printf("undefined_handler_address = %08x\n", undefined_handler_address);
#endif

	/* Initialise the undefined instruction handlers */
#ifdef VERBOSE_INIT_ARM
	printf("undefined ");
#endif
	undefined_init();

	/* Load memory into UVM. */
#ifdef VERBOSE_INIT_ARM
	printf("page ");
#endif
	uvm_setpagesize();	/* initialize PAGE_SIZE-dependent variables */
	uvm_page_physload(atop(physical_freestart), atop(physical_freeend),
	    atop(physical_freestart), atop(physical_freeend),
	    VM_FREELIST_DEFAULT);

	/* Boot strap pmap telling it where the kernel page table is */
#ifdef VERBOSE_INIT_ARM
	printf("pmap ");
#endif
	pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE);

	/* Setup the IRQ system */
#ifdef VERBOSE_INIT_ARM
	printf("irq ");
#endif
	ixp12x0_intr_init();

#ifdef VERBOSE_INIT_ARM
	printf("done.\n");
#endif

#ifdef VERBOSE_INIT_ARM
	printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n",
		physical_freestart, free_pages, free_pages);
	printf("freemempos=%08lx\n", freemempos);
	printf("switching to new L1 page table  @%#lx... \n", kernel_l1pt.pv_pa);
#endif

	consinit();
#ifdef VERBOSE_INIT_ARM
	printf("consinit \n");
#endif

	ixdp_ixp12x0_cc_setup();

#ifdef VERBOSE_INIT_ARM
	printf("bootstrap done.\n");
#endif

#if NKSYMS || defined(DDB) || defined(MODULAR)
	ksyms_addsyms_elf(symbolsize, ((int *)&end), ((char *)&end) + symbolsize);
#endif

#ifdef DDB
	db_machine_init();
	if (boothowto & RB_KDB)
		Debugger();
#endif

	/* We return the new stack pointer address */
	return(kernelstack.pv_va + USPACE_SVC_STACK_TOP);
}
コード例 #25
0
ファイル: machdep.c プロジェクト: yazshel/netbsd-kernel
/*
 * Do all the stuff that locore normally does before calling main().
 */
void
mach_init(int32_t memsize32, u_int bim, int32_t bip32)
{
	intptr_t memsize = (int32_t)memsize32;
	char *kernend;
	char *bip = (char *)(intptr_t)(int32_t)bip32;
	u_long first, last;
	extern char edata[], end[];
	const char *bi_msg;
#if NKSYMS || defined(DDB) || defined(MODULAR)
	char *ssym = 0;
	struct btinfo_symtab *bi_syms;
#endif
	struct btinfo_howto *bi_howto;

	/*
	 * Clear the BSS segment (if needed).
	 */
	if (memcmp(((Elf_Ehdr *)end)->e_ident, ELFMAG, SELFMAG) == 0 &&
	    ((Elf_Ehdr *)end)->e_ident[EI_CLASS] == ELFCLASS) {
		esym = end;
#if NKSYMS || defined(DDB) || defined(MODULAR)
		esym += ((Elf_Ehdr *)end)->e_entry;
#endif
		kernend = (char *)mips_round_page(esym);
		/*
		 * We don't have to clear BSS here
		 * since our bootloader already does it.
		 */
#if 0
		memset(edata, 0, end - edata);
#endif
	} else {
		kernend = (void *)mips_round_page(end);
		/*
		 * No symbol table, so assume we are loaded by
		 * the firmware directly with "bfd" command.
		 * The firmware loader doesn't clear BSS of
		 * a loaded kernel, so do it here.
		 */
		memset(edata, 0, kernend - edata);

	}

	/*
	 * Copy exception-dispatch code down to exception vector.
	 * Initialize locore-function vector.
	 * Clear out the I and D caches.
	 */
	mips_vector_init(NULL, false);

	/* Check for valid bootinfo passed from bootstrap */
	if (bim == BOOTINFO_MAGIC) {
		struct btinfo_magic *bi_magic;

		bootinfo = bip;
		bi_magic = lookup_bootinfo(BTINFO_MAGIC);
		if (bi_magic == NULL) {
			bi_msg = "missing bootinfo structure";
			bim = (uintptr_t)bip;
		} else if (bi_magic->magic != BOOTINFO_MAGIC) {
			bi_msg = "invalid bootinfo structure";
			bim = bi_magic->magic;
		} else
			bi_msg = NULL;
	} else {
		bi_msg = "invalid bootinfo (standalone boot?)";
	}

#if NKSYMS || defined(DDB) || defined(MODULAR)
	bi_syms = lookup_bootinfo(BTINFO_SYMTAB);

	/* Load symbol table if present */
	if (bi_syms != NULL) {
		ssym = (void *)(intptr_t)bi_syms->ssym;
		esym = (void *)(intptr_t)bi_syms->esym;
		kernend = (void *)mips_round_page(esym);
	}
#endif

	bi_howto = lookup_bootinfo(BTINFO_HOWTO);
	if (bi_howto != NULL)
		boothowto = bi_howto->bi_howto;

	cobalt_id = read_board_id();
	if (cobalt_id >= COBALT_MODELS || cobalt_model[cobalt_id] == NULL)
		cpu_setmodel("Cobalt unknown model (board ID %u)",
		    cobalt_id);
	else
		cpu_setmodel("%s", cobalt_model[cobalt_id]);

	switch (cobalt_id) {
	case COBALT_ID_QUBE2700:
	case COBALT_ID_RAQ:
		cpuspeed = 150; /* MHz */
		break;
	case COBALT_ID_QUBE2:
	case COBALT_ID_RAQ2:
		cpuspeed = 250; /* MHz */
		break;
	default:
		/* assume the fastest, so that delay(9) works */
		cpuspeed = 250;
		break;
	}
	curcpu()->ci_cpu_freq = cpuspeed * 1000 * 1000;
	curcpu()->ci_cycles_per_hz = (curcpu()->ci_cpu_freq + hz / 2) / hz;
	curcpu()->ci_divisor_delay =
	    ((curcpu()->ci_cpu_freq + (1000000 / 2)) / 1000000);
	/* all models have Rm5200, which is CPU_MIPS_DOUBLE_COUNT */
	curcpu()->ci_cycles_per_hz /= 2;
	curcpu()->ci_divisor_delay /= 2;

	physmem = btoc(memsize - MIPS_KSEG0_START);

	consinit();

	KASSERT(&lwp0 == curlwp);
	if (bi_msg != NULL)
		printf("%s: magic=%#x bip=%p\n", bi_msg, bim, bip);

	uvm_setpagesize();

	/*
	 * The boot command is passed in the top 512 bytes,
	 * so don't clobber that.
	 */
	mem_clusters[0].start = 0;
	mem_clusters[0].size = ctob(physmem) - 512;
	mem_cluster_cnt = 1;

	memcpy(bootstring, (char *)(memsize - 512), 512);
	memset((char *)(memsize - 512), 0, 512);
	bootstring[511] = '\0';

	decode_bootstring();

#if NKSYMS || defined(DDB) || defined(MODULAR)
	/* init symbols if present */
	if ((bi_syms != NULL) && (esym != NULL))
		ksyms_addsyms_elf(esym - ssym, ssym, esym);
#endif
	KASSERT(&lwp0 == curlwp);
#ifdef DDB
	if (boothowto & RB_KDB)
		Debugger();
#endif
#ifdef KGDB
	if (boothowto & RB_KDB)
		kgdb_connect(0);
#endif

	/*
	 * Load the rest of the available pages into the VM system.
	 */
	first = round_page(MIPS_KSEG0_TO_PHYS(kernend));
	last = mem_clusters[0].start + mem_clusters[0].size;
	uvm_page_physload(atop(first), atop(last), atop(first), atop(last),
	    VM_FREELIST_DEFAULT);

	/*
	 * Initialize error message buffer (at end of core).
	 */
	mips_init_msgbuf();

	pmap_bootstrap();

	/*
	 * Allocate space for proc0's USPACE.
	 */
	mips_init_lwp0_uarea();
}
コード例 #26
0
ファイル: machdep.c プロジェクト: avsm/openbsd-xen-sys
void
init_x86_64(paddr_t first_avail)
{
	extern void consinit(void);
	extern struct extent *iomem_ex;
	struct region_descriptor region;
	struct mem_segment_descriptor *ldt_segp;
	int x, first16q, ist;
	u_int64_t seg_start, seg_end;
	u_int64_t seg_start1, seg_end1;

	cpu_init_msrs(&cpu_info_primary);

	proc0.p_addr = proc0paddr;
	cpu_info_primary.ci_curpcb = &proc0.p_addr->u_pcb;

	x86_bus_space_init();

	consinit();	/* XXX SHOULD NOT BE DONE HERE */

	/*
	 * Initailize PAGE_SIZE-dependent variables.
	 */
	uvm_setpagesize();

#if 0
	uvmexp.ncolors = 2;
#endif
 
	/*
	 * Boot arguments are in a single page specified by /boot.
	 *
	 * We require the "new" vector form, as well as memory ranges
	 * to be given in bytes rather than KB.
	 *
	 * locore copies the data into bootinfo[] for us.
	 */
	if ((bootapiver & (BAPIV_VECTOR | BAPIV_BMEMMAP)) ==
	    (BAPIV_VECTOR | BAPIV_BMEMMAP)) {
		if (bootinfo_size >= sizeof(bootinfo))
			panic("boot args too big");

		getbootinfo(bootinfo, bootinfo_size);
	} else
		panic("invalid /boot");

	avail_start = PAGE_SIZE; /* BIOS leaves data in low memory */
				 /* and VM system doesn't work with phys 0 */
#ifdef MULTIPROCESSOR
	if (avail_start < MP_TRAMPOLINE + PAGE_SIZE)
		avail_start = MP_TRAMPOLINE + PAGE_SIZE;
#endif

	/*
	 * Call pmap initialization to make new kernel address space.
	 * We must do this before loading pages into the VM system.
	 */
	pmap_bootstrap(VM_MIN_KERNEL_ADDRESS,
	    IOM_END + trunc_page(KBTOB(biosextmem)));

	if (avail_start != PAGE_SIZE)
		pmap_prealloc_lowmem_ptps();

	if (mem_cluster_cnt == 0) {
		/*
		 * Allocate the physical addresses used by RAM from the iomem
		 * extent map.  This is done before the addresses are
		 * page rounded just to make sure we get them all.
		 */
		if (extent_alloc_region(iomem_ex, 0, KBTOB(biosbasemem),
		    EX_NOWAIT)) {
			/* XXX What should we do? */
			printf("WARNING: CAN'T ALLOCATE BASE MEMORY FROM "
			    "IOMEM EXTENT MAP!\n");
		}
		mem_clusters[0].start = 0;
		mem_clusters[0].size = trunc_page(KBTOB(biosbasemem));
		physmem += atop(mem_clusters[0].size);
		if (extent_alloc_region(iomem_ex, IOM_END, KBTOB(biosextmem),
		    EX_NOWAIT)) {
			/* XXX What should we do? */
			printf("WARNING: CAN'T ALLOCATE EXTENDED MEMORY FROM "
			    "IOMEM EXTENT MAP!\n");
		}
#if 0
#if NISADMA > 0
		/*
		 * Some motherboards/BIOSes remap the 384K of RAM that would
		 * normally be covered by the ISA hole to the end of memory
		 * so that it can be used.  However, on a 16M system, this
		 * would cause bounce buffers to be allocated and used.
		 * This is not desirable behaviour, as more than 384K of
		 * bounce buffers might be allocated.  As a work-around,
		 * we round memory down to the nearest 1M boundary if
		 * we're using any isadma devices and the remapped memory
		 * is what puts us over 16M.
		 */
		if (biosextmem > (15*1024) && biosextmem < (16*1024)) {
			char pbuf[9];

			format_bytes(pbuf, sizeof(pbuf),
			    biosextmem - (15*1024));
			printf("Warning: ignoring %s of remapped memory\n",
			    pbuf);
			biosextmem = (15*1024);
		}
#endif
#endif
		mem_clusters[1].start = IOM_END;
		mem_clusters[1].size = trunc_page(KBTOB(biosextmem));
		physmem += atop(mem_clusters[1].size);

		mem_cluster_cnt = 2;

		avail_end = IOM_END + trunc_page(KBTOB(biosextmem));
	}

	/*
	 * If we have 16M of RAM or less, just put it all on
	 * the default free list.  Otherwise, put the first
	 * 16M of RAM on a lower priority free list (so that
	 * all of the ISA DMA'able memory won't be eaten up
	 * first-off).
	 */
	if (avail_end <= (16 * 1024 * 1024))
		first16q = VM_FREELIST_DEFAULT;
	else
		first16q = VM_FREELIST_FIRST16;

	/* Make sure the end of the space used by the kernel is rounded. */
	first_avail = round_page(first_avail);
	kern_end = KERNBASE + first_avail;

	/*
	 * Now, load the memory clusters (which have already been
	 * rounded and truncated) into the VM system.
	 *
	 * NOTE: WE ASSUME THAT MEMORY STARTS AT 0 AND THAT THE KERNEL
	 * IS LOADED AT IOM_END (1M).
	 */
	for (x = 0; x < mem_cluster_cnt; x++) {
		seg_start = mem_clusters[x].start;
		seg_end = mem_clusters[x].start + mem_clusters[x].size;
		seg_start1 = 0;
		seg_end1 = 0;

		if (seg_start > 0xffffffffULL) {
			printf("skipping %lld bytes of memory above 4GB\n",
			    seg_end - seg_start);
			continue;
		}
		if (seg_end > 0x100000000ULL) {
			printf("skipping %lld bytes of memory above 4GB\n",
			    seg_end - 0x100000000ULL);
			seg_end = 0x100000000ULL;
		}

		/*
		 * Skip memory before our available starting point.
		 */
		if (seg_end <= avail_start)
			continue;

		if (avail_start >= seg_start && avail_start < seg_end) {
			if (seg_start != 0)
				panic("init_x86_64: memory doesn't start at 0");
			seg_start = avail_start;
			if (seg_start == seg_end)
				continue;
		}

		/*
		 * If this segment contains the kernel, split it
		 * in two, around the kernel.
		 */
		if (seg_start <= IOM_END && first_avail <= seg_end) {
			seg_start1 = first_avail;
			seg_end1 = seg_end;
			seg_end = IOM_END;
		}

		/* First hunk */
		if (seg_start != seg_end) {
			if (seg_start <= (16 * 1024 * 1024) &&
			    first16q != VM_FREELIST_DEFAULT) {
				u_int64_t tmp;

				if (seg_end > (16 * 1024 * 1024))
					tmp = (16 * 1024 * 1024);
				else
					tmp = seg_end;
#if DEBUG_MEMLOAD
				printf("loading 0x%qx-0x%qx (0x%lx-0x%lx)\n",
				    (unsigned long long)seg_start,
				    (unsigned long long)tmp,
				    atop(seg_start), atop(tmp));
#endif
				uvm_page_physload(atop(seg_start),
				    atop(tmp), atop(seg_start),
				    atop(tmp), first16q);
				seg_start = tmp;
			}

			if (seg_start != seg_end) {
#if DEBUG_MEMLOAD
				printf("loading 0x%qx-0x%qx (0x%lx-0x%lx)\n",
				    (unsigned long long)seg_start,
				    (unsigned long long)seg_end,
				    atop(seg_start), atop(seg_end));
#endif
				uvm_page_physload(atop(seg_start),
				    atop(seg_end), atop(seg_start),
				    atop(seg_end), VM_FREELIST_DEFAULT);
			}
		}

		/* Second hunk */
		if (seg_start1 != seg_end1) {
			if (seg_start1 <= (16 * 1024 * 1024) &&
			    first16q != VM_FREELIST_DEFAULT) {
				u_int64_t tmp;

				if (seg_end1 > (16 * 1024 * 1024))
					tmp = (16 * 1024 * 1024);
				else
					tmp = seg_end1;
#if DEBUG_MEMLOAD
				printf("loading 0x%qx-0x%qx (0x%lx-0x%lx)\n",
				    (unsigned long long)seg_start1,
				    (unsigned long long)tmp,
				    atop(seg_start1), atop(tmp));
#endif
				uvm_page_physload(atop(seg_start1),
				    atop(tmp), atop(seg_start1),
				    atop(tmp), first16q);
				seg_start1 = tmp;
			}

			if (seg_start1 != seg_end1) {
#if DEBUG_MEMLOAD
				printf("loading 0x%qx-0x%qx (0x%lx-0x%lx)\n",
				    (unsigned long long)seg_start1,
				    (unsigned long long)seg_end1,
				    atop(seg_start1), atop(seg_end1));
#endif
				uvm_page_physload(atop(seg_start1),
				    atop(seg_end1), atop(seg_start1),
				    atop(seg_end1), VM_FREELIST_DEFAULT);
			}
		}
	}

	/*
	 * Steal memory for the message buffer (at end of core).
	 */
	{
		struct vm_physseg *vps = NULL;
		psize_t sz = round_page(MSGBUFSIZE);
		psize_t reqsz = sz;

		for (x = 0; x < vm_nphysseg; x++) {
			vps = &vm_physmem[x];
			if (ptoa(vps->avail_end) == avail_end)
				break;
		}
		if (x == vm_nphysseg)
			panic("init_x86_64: can't find end of memory");

		/* Shrink so it'll fit in the last segment. */
		if ((vps->avail_end - vps->avail_start) < atop(sz))
			sz = ptoa(vps->avail_end - vps->avail_start);

		vps->avail_end -= atop(sz);
		vps->end -= atop(sz);
		msgbuf_paddr = ptoa(vps->avail_end);

		/* Remove the last segment if it now has no pages. */
		if (vps->start == vps->end) {
			for (vm_nphysseg--; x < vm_nphysseg; x++)
				vm_physmem[x] = vm_physmem[x + 1];
		}

		/* Now find where the new avail_end is. */
		for (avail_end = 0, x = 0; x < vm_nphysseg; x++)
			if (vm_physmem[x].avail_end > avail_end)
				avail_end = vm_physmem[x].avail_end;
		avail_end = ptoa(avail_end);

		/* Warn if the message buffer had to be shrunk. */
		if (sz != reqsz)
			printf("WARNING: %ld bytes not available for msgbuf "
			    "in last cluster (%ld used)\n", reqsz, sz);
	}

	/*
	 * XXXfvdl todo: acpi wakeup code.
	 */

	pmap_growkernel(VM_MIN_KERNEL_ADDRESS + 32 * 1024 * 1024);

	pmap_kenter_pa(idt_vaddr, idt_paddr, VM_PROT_READ|VM_PROT_WRITE);
	pmap_kenter_pa(idt_vaddr + PAGE_SIZE, idt_paddr + PAGE_SIZE,
	    VM_PROT_READ|VM_PROT_WRITE);

	pmap_kenter_pa(lo32_vaddr, lo32_paddr, VM_PROT_READ|VM_PROT_WRITE);

	idt = (struct gate_descriptor *)idt_vaddr;
	gdtstore = (char *)(idt + NIDT);
	ldtstore = gdtstore + DYNSEL_START;

	/* make gdt gates and memory segments */
	set_mem_segment(GDT_ADDR_MEM(gdtstore, GCODE_SEL), 0, 0xfffff, SDT_MEMERA,
	    SEL_KPL, 1, 0, 1);

	set_mem_segment(GDT_ADDR_MEM(gdtstore, GDATA_SEL), 0, 0xfffff, SDT_MEMRWA,
	    SEL_KPL, 1, 0, 1);

	set_sys_segment(GDT_ADDR_SYS(gdtstore, GLDT_SEL), ldtstore, LDT_SIZE - 1,
	    SDT_SYSLDT, SEL_KPL, 0);

	set_mem_segment(GDT_ADDR_MEM(gdtstore, GUCODE_SEL), 0,
	    atop(VM_MAXUSER_ADDRESS) - 1, SDT_MEMERA, SEL_UPL, 1, 0, 1);

	set_mem_segment(GDT_ADDR_MEM(gdtstore, GUDATA_SEL), 0,
	    atop(VM_MAXUSER_ADDRESS) - 1, SDT_MEMRWA, SEL_UPL, 1, 0, 1);

	/* make ldt gates and memory segments */
	setgate((struct gate_descriptor *)(ldtstore + LSYS5CALLS_SEL),
	    &IDTVEC(oosyscall), 0, SDT_SYS386CGT, SEL_UPL,
	    GSEL(GCODE_SEL, SEL_KPL));

	*(struct mem_segment_descriptor *)(ldtstore + LUCODE_SEL) =
	    *GDT_ADDR_MEM(gdtstore, GUCODE_SEL);
	*(struct mem_segment_descriptor *)(ldtstore + LUDATA_SEL) =
	    *GDT_ADDR_MEM(gdtstore, GUDATA_SEL);

	/*
	 * 32 bit GDT entries.
	 */

	set_mem_segment(GDT_ADDR_MEM(gdtstore, GUCODE32_SEL), 0,
	    atop(VM_MAXUSER_ADDRESS) - 1, SDT_MEMERA, SEL_UPL, 1, 1, 0);

	set_mem_segment(GDT_ADDR_MEM(gdtstore, GUDATA32_SEL), 0,
	    atop(VM_MAXUSER_ADDRESS) - 1, SDT_MEMRWA, SEL_UPL, 1, 1, 0);

	/*
	 * 32 bit LDT entries.
	 */
	ldt_segp = (struct mem_segment_descriptor *)(ldtstore + LUCODE32_SEL);
	set_mem_segment(ldt_segp, 0, atop(VM_MAXUSER_ADDRESS32) - 1,
	    SDT_MEMERA, SEL_UPL, 1, 1, 0);
	ldt_segp = (struct mem_segment_descriptor *)(ldtstore + LUDATA32_SEL);
	set_mem_segment(ldt_segp, 0, atop(VM_MAXUSER_ADDRESS32) - 1,
	    SDT_MEMRWA, SEL_UPL, 1, 1, 0);

	/*
	 * Other entries.
	 */
	memcpy((struct gate_descriptor *)(ldtstore + LSOL26CALLS_SEL),
	    (struct gate_descriptor *)(ldtstore + LSYS5CALLS_SEL),
	    sizeof (struct gate_descriptor));
	memcpy((struct gate_descriptor *)(ldtstore + LBSDICALLS_SEL),
	    (struct gate_descriptor *)(ldtstore + LSYS5CALLS_SEL),
	    sizeof (struct gate_descriptor));

	/* exceptions */
	for (x = 0; x < 32; x++) {
		ist = (x == 8) ? 1 : 0;
		setgate(&idt[x], IDTVEC(exceptions)[x], ist, SDT_SYS386IGT,
		    (x == 3 || x == 4) ? SEL_UPL : SEL_KPL,
		    GSEL(GCODE_SEL, SEL_KPL));
		idt_allocmap[x] = 1;
	}

	/* new-style interrupt gate for syscalls */
	setgate(&idt[128], &IDTVEC(osyscall), 0, SDT_SYS386IGT, SEL_UPL,
	    GSEL(GCODE_SEL, SEL_KPL));
	idt_allocmap[128] = 1;

	setregion(&region, gdtstore, DYNSEL_START - 1);
	lgdt(&region);

	cpu_init_idt();

#ifdef DDB
	db_machine_init();
	ddb_init();
	if (boothowto & RB_KDB)
		Debugger();
#endif
#ifdef KGDB
	kgdb_port_init();
	if (boothowto & RB_KDB) {
		kgdb_debug_init = 1;
		kgdb_connect(1);
	}
#endif

	intr_default_setup();

	softintr_init();
	splraise(IPL_IPI);
	enable_intr();

        /* Make sure maxproc is sane */ 
        if (maxproc > cpu_maxproc())
                maxproc = cpu_maxproc();
}
コード例 #27
0
ファイル: osk5912_machdep.c プロジェクト: lacombar/netbsd-alc
/*
 * u_int initarm(...)
 *
 * Initial entry point on startup. This gets called before main() is
 * entered.
 * It should be responsible for setting up everything that must be
 * in place when main is called.
 * This includes
 *   Taking a copy of the boot configuration structure.
 *   Initialising the physical console so characters can be printed.
 *   Setting up page tables for the kernel
 *   Relocating the kernel to the bottom of physical memory
 */
u_int
initarm(void *arg)
{
	/*
	 * When we enter here, we are using a temporary first level
	 * translation table with section entries in it to cover the TIPB
	 * peripherals and SDRAM.  The temporary first level translation table
	 * is at the end of SDRAM.
	 */

	/* Heads up ... Setup the CPU / MMU / TLB functions. */
	if (set_cpufuncs())
		panic("cpu not recognized!");

	init_clocks();

	/* The console is going to try to map things.  Give pmap a devmap. */
	pmap_devmap_register(devmap);
	consinit();
#ifdef KGDB
	kgdb_port_init();
#endif

#ifdef VERBOSE_INIT_ARM
	/* Talk to the user */
	printf("\nNetBSD/evbarm (OSK5912) booting ...\n");
#endif

#ifdef BOOT_ARGS
	char mi_bootargs[] = BOOT_ARGS;
	parse_mi_bootargs(mi_bootargs);
#endif

#ifdef VERBOSE_INIT_ARM
	printf("initarm: Configuring system ...\n");
#endif

	/*
	 * Set up the variables that define the availability of physical
	 * memory.
	 */
	physical_start = KERNEL_BASE_PHYS;
	physical_end = physical_start + MEMSIZE_BYTES;
	physmem = MEMSIZE_BYTES / PAGE_SIZE;

	/* Fake bootconfig structure for the benefit of pmap.c. */
	bootconfig.dramblocks = 1;
	bootconfig.dram[0].address = physical_start;
	bootconfig.dram[0].pages = physmem;

	/*
	 * Our kernel is at the beginning of memory, so set our free space to
	 * all the memory after the kernel.
	 */
	physical_freestart = KERN_VTOPHYS(round_page((vaddr_t) _end));
	physical_freeend = physical_end;
	free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE;

	/*
	 * This is going to do all the hard work of setting up the first and
	 * and second level page tables.  Pages of memory will be allocated
	 * and mapped for other structures that are required for system
	 * operation.  When it returns, physical_freestart and free_pages will
	 * have been updated to reflect the allocations that were made.  In
	 * addition, kernel_l1pt, kernel_pt_table[], systempage, irqstack,
	 * abtstack, undstack, kernelstack, msgbufphys will be set to point to
	 * the memory that was allocated for them.
	 */
	setup_real_page_tables();

	/*
	 * Moved from cpu_startup() as data_abort_handler() references
	 * this during uvm init.
	 */
	proc0paddr = (struct user *)kernelstack.pv_va;
	lwp0.l_addr = proc0paddr;

#ifdef VERBOSE_INIT_ARM
	printf("bootstrap done.\n");
#endif

	arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL);

	/*
	 * Pages were allocated during the secondary bootstrap for the
	 * stacks for different CPU modes.
	 * We must now set the r13 registers in the different CPU modes to
	 * point to these stacks.
	 * Since the ARM stacks use STMFD etc. we must set r13 to the top end
	 * of the stack memory.
	 */
#ifdef VERBOSE_INIT_ARM
	printf("init subsystems: stacks ");
#endif

	set_stackptr(PSR_IRQ32_MODE, irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE);
	set_stackptr(PSR_ABT32_MODE, abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE);
	set_stackptr(PSR_UND32_MODE, undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE);

	/*
	 * Well we should set a data abort handler.
	 * Once things get going this will change as we will need a proper
	 * handler.
	 * Until then we will use a handler that just panics but tells us
	 * why.
	 * Initialisation of the vectors will just panic on a data abort.
	 * This just fills in a slightly better one.
	 */
#ifdef VERBOSE_INIT_ARM
	printf("vectors ");
#endif
	data_abort_handler_address = (u_int)data_abort_handler;
	prefetch_abort_handler_address = (u_int)prefetch_abort_handler;
	undefined_handler_address = (u_int)undefinedinstruction_bounce;

	/* Initialise the undefined instruction handlers */
#ifdef VERBOSE_INIT_ARM
	printf("undefined ");
#endif
	undefined_init();

	/* Load memory into UVM. */
#ifdef VERBOSE_INIT_ARM
	printf("page ");
#endif
	uvm_setpagesize();        /* initialize PAGE_SIZE-dependent variables */
	uvm_page_physload(atop(physical_freestart), atop(physical_freeend),
	    atop(physical_freestart), atop(physical_freeend),
	    VM_FREELIST_DEFAULT);

	/* Boot strap pmap telling it where the kernel page table is */
#ifdef VERBOSE_INIT_ARM
	printf("pmap ");
#endif
	pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE);

#ifdef VERBOSE_INIT_ARM
	printf("done.\n");
#endif

#ifdef KGDB
	if (boothowto & RB_KDB) {
		kgdb_debug_init = 1;
		kgdb_connect(1);
	}
#endif

#ifdef DDB
	db_machine_init();

	/* Firmware doesn't load symbols. */
	ddb_init(0, NULL, NULL);

	if (boothowto & RB_KDB)
		Debugger();
#endif

	/* We return the new stack pointer address */
	return(kernelstack.pv_va + USPACE_SVC_STACK_TOP);
}
コード例 #28
0
u_int
initarm(void *arg)
{
	int loop;
	int loop1;
	u_int l1pagetable;
	extern int etext __asm("_etext");
	extern int end __asm("_end");
	int progress_counter = 0;

#ifdef DO_MEMORY_DISK
	vm_offset_t md_root_start;
#define MD_ROOT_SIZE (MEMORY_DISK_ROOT_SIZE * DEV_BSIZE)
#endif

#define gpio8(reg) (*(volatile uint8_t *)(ioreg_vaddr(S3C2800_GPIO_BASE) + (reg)))

#define LEDSTEP()  __LED(progress_counter++)

#define pdatc gpio8(GPIO_PDATC)
#define __LED(x)  (pdatc = (pdatc & ~0x07) | (~(x) & 0x07))

	LEDSTEP();
	/*
	 * Heads up ... Setup the CPU / MMU / TLB functions
	 */
	if (set_cpufuncs())
		panic("CPU not recognized!");

	LEDSTEP();


	/* Disable all peripheral interrupts */
	ioreg32(S3C2800_INTCTL_BASE + INTCTL_INTMSK) = 0;

	consinit();
#ifdef VERBOSE_INIT_ARM
	printf("consinit done\n");
#endif

#ifdef KGDB
	LEDSTEP();
	kgdb_port_init();
#endif
	LEDSTEP();

#ifdef VERBOSE_INIT_ARM
	/* Talk to the user */
	printf("\nNetBSD/evbarm (SMDK2800) booting ...\n");
#endif

	/*
	 * Ok we have the following memory map
	 *
	 * Physical Address Range     Description
	 * -----------------------    ----------------------------------
	 * 0x00000000 - 0x00ffffff    Intel flash Memory   (16MB)
	 * 0x02000000 - 0x020fffff    AMD flash Memory   (1MB)
	 * or 			       (depend on DIPSW setting)
	 * 0x00000000 - 0x000fffff    AMD flash Memory   (1MB)
	 * 0x02000000 - 0x02ffffff    Intel flash Memory   (16MB)
	 *
	 * 0x08000000 - 0x09ffffff    SDRAM (32MB)
	 * 0x20000000 - 0x3fffffff    PCI space
	 *
	 * The initarm() has the responsibility for creating the kernel
	 * page tables.
	 * It must also set up various memory pointers that are used
	 * by pmap etc.
	 */

	/* Fake bootconfig structure for the benefit of pmap.c */
	/* XXX must make the memory description h/w independent */
	bootconfig.dramblocks = 1;
	bootconfig.dram[0].address = SDRAM_START;
	bootconfig.dram[0].pages = SDRAM_SIZE / PAGE_SIZE;

	/*
	 * Set up the variables that define the availablilty of
	 * physical memory.  For now, we're going to set
	 * physical_freestart to 0x08200000 (where the kernel
	 * was loaded), and allocate the memory we need downwards.
	 * If we get too close to the bottom of SDRAM, we
	 * will panic.  We will update physical_freestart and
	 * physical_freeend later to reflect what pmap_bootstrap()
	 * wants to see.
	 *
	 * XXX pmap_bootstrap() needs an enema.
	 */
	physical_start = bootconfig.dram[0].address;
	physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE);

#if DO_MEMORY_DISK
#ifdef MEMORY_DISK_ROOT_ROM
	md_root_start = MEMORY_DISK_ROOT_ADDR;
	boothowto |= RB_RDONLY;
#else
	/* Reserve physmem for ram disk */
	md_root_start = ((physical_end - MD_ROOT_SIZE) & ~(L1_S_SIZE-1));
	printf("Reserve %ld bytes for memory disk\n",  
	    physical_end - md_root_start);
	/* copy fs contents */
	memcpy((void *)md_root_start, (void *)MEMORY_DISK_ROOT_ADDR,
	    MD_ROOT_SIZE);
	physical_end = md_root_start;
#endif
#endif

	physical_freestart = 0x08000000UL;	/* XXX */
	physical_freeend = 0x08200000UL;

	physmem = (physical_end - physical_start) / PAGE_SIZE;

#ifdef VERBOSE_INIT_ARM
	/* Tell the user about the memory */
	printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem,
	    physical_start, physical_end - 1);
#endif

	/*
	 * XXX
	 * Okay, the kernel starts 2MB in from the bottom of physical
	 * memory.  We are going to allocate our bootstrap pages downwards
	 * from there.
	 *
	 * We need to allocate some fixed page tables to get the kernel
	 * going.  We allocate one page directory and a number of page
	 * tables and store the physical addresses in the kernel_pt_table
	 * array.
	 *
	 * The kernel page directory must be on a 16K boundary.  The page
	 * tables must be on 4K boundaries.  What we do is allocate the
	 * page directory on the first 16K boundary that we encounter, and
	 * the page tables on 4K boundaries otherwise.  Since we allocate
	 * at least 3 L2 page tables, we are guaranteed to encounter at
	 * least one 16K aligned region.
	 */

#ifdef VERBOSE_INIT_ARM
	printf("Allocating page tables\n");
#endif

	free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE;

#ifdef VERBOSE_INIT_ARM
	printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n",
	    physical_freestart, free_pages, free_pages);
#endif

	/* Define a macro to simplify memory allocation */
#define	valloc_pages(var, np)				\
	alloc_pages((var).pv_pa, (np));			\
	(var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start;

#define alloc_pages(var, np)				\
	physical_freeend -= ((np) * PAGE_SIZE);		\
	if (physical_freeend < physical_freestart)	\
		panic("initarm: out of memory");	\
	(var) = physical_freeend;			\
	free_pages -= (np);				\
	memset((char *)(var), 0, ((np) * PAGE_SIZE));

	loop1 = 0;
	for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) {
		/* Are we 16KB aligned for an L1 ? */
		if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0
		    && kernel_l1pt.pv_pa == 0) {
			valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE);
		} else {
			valloc_pages(kernel_pt_table[loop1],
			    L2_TABLE_SIZE / PAGE_SIZE);
			++loop1;
		}
	}

	/* This should never be able to happen but better confirm that. */
	if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0)
		panic("initarm: Failed to align the kernel page directory\n");

	/*
	 * Allocate a page for the system page mapped to V0x00000000
	 * This page will just contain the system vectors and can be
	 * shared by all processes.
	 */
	alloc_pages(systempage.pv_pa, 1);

	/* Allocate stacks for all modes */
	valloc_pages(irqstack, IRQ_STACK_SIZE);
	valloc_pages(abtstack, ABT_STACK_SIZE);
	valloc_pages(undstack, UND_STACK_SIZE);
	valloc_pages(kernelstack, UPAGES);

#ifdef VERBOSE_INIT_ARM
	printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa,
	    irqstack.pv_va);
	printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa,
	    abtstack.pv_va);
	printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa,
	    undstack.pv_va);
	printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa,
	    kernelstack.pv_va);
#endif

	alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE);

	LEDSTEP();

	/*
	 * Ok we have allocated physical pages for the primary kernel
	 * page tables
	 */

#ifdef VERBOSE_INIT_ARM
	printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa);
#endif

	/*
	 * Now we start construction of the L1 page table
	 * We start by mapping the L2 page tables into the L1.
	 * This means that we can replace L1 mappings later on if necessary
	 */
	l1pagetable = kernel_l1pt.pv_pa;

	/* Map the L2 pages tables in the L1 page table */
	pmap_link_l2pt(l1pagetable, 0x00000000,
	    &kernel_pt_table[KERNEL_PT_SYS]);
	for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++)
		pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000,
		    &kernel_pt_table[KERNEL_PT_KERNEL + loop]);
	for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++)
		pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000,
		    &kernel_pt_table[KERNEL_PT_VMDATA + loop]);

	/* update the top of the kernel VM */
	pmap_curmaxkvaddr =
	    KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000);

#ifdef VERBOSE_INIT_ARM
	printf("Mapping kernel\n");
#endif

	/* Now we fill in the L2 pagetable for the kernel static code/data */
	{
		size_t textsize = (uintptr_t)&etext - KERNEL_TEXT_BASE;
		size_t totalsize = (uintptr_t)&end - KERNEL_TEXT_BASE;
		u_int logical;

		textsize = (textsize + PGOFSET) & ~PGOFSET;
		totalsize = (totalsize + PGOFSET) & ~PGOFSET;

		logical = 0x00200000;	/* offset of kernel in RAM */

		logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical,
		    physical_start + logical, textsize,
		    VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE);
		logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical,
		    physical_start + logical, totalsize - textsize,
		    VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE);
	}

#ifdef VERBOSE_INIT_ARM
	printf("Constructing L2 page tables\n");
#endif

	/* Map the stack pages */
	pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa,
	    IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE,
	    PTE_CACHE);
	pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa,
	    ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE,
	    PTE_CACHE);
	pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa,
	    UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE,
	    PTE_CACHE);
	pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa,
	    UPAGES * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE);

	pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa,
	    L1_TABLE_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_PAGETABLE);

	for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) {
		pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va,
		    kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE,
		    VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
	}

	/* Map the vector page. */
#if 1
	/* MULTI-ICE requires that page 0 is NC/NB so that it can download the
	 * cache-clean code there.  */
	pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa,
	    VM_PROT_READ | VM_PROT_WRITE, PTE_NOCACHE);
#else
	pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa,
	    VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE);
#endif

#ifdef MEMORY_DISK_DYNAMIC
	/* map MD root image */
	pmap_map_chunk(l1pagetable, SMDK2800_MEMORY_DISK_VADDR, md_root_start,
	    MD_ROOT_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE);

	md_root_setconf((void *)md_root_start, MD_ROOT_SIZE);
#endif /* MEMORY_DISK_DYNAMIC */
	/*
	 * map integrated peripherals at same address in l1pagetable
	 * so that we can continue to use console.
	 */
	pmap_devmap_bootstrap(l1pagetable, smdk2800_devmap);

	/*
	 * Now we have the real page tables in place so we can switch to them.
	 * Once this is done we will be running with the REAL kernel page
	 * tables.
	 */

	/*
	 * Update the physical_freestart/physical_freeend/free_pages
	 * variables.
	 */
	{
		physical_freestart = physical_start +
		    (((((uintptr_t)&end) + PGOFSET) & ~PGOFSET) - KERNEL_BASE);
		physical_freeend = physical_end;
		free_pages =
		    (physical_freeend - physical_freestart) / PAGE_SIZE;
	}

	/* Switch tables */
#ifdef VERBOSE_INIT_ARM
	printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n",
	    physical_freestart, free_pages, free_pages);
	printf("switching to new L1 page table  @%#lx...", kernel_l1pt.pv_pa);
#endif
	LEDSTEP();
	cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT);
	cpu_setttb(kernel_l1pt.pv_pa, true);
	cpu_tlb_flushID();
	cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2));

	/*
	 * Moved from cpu_startup() as data_abort_handler() references
	 * this during uvm init
	 */
	uvm_lwp_setuarea(&lwp0, kernelstack.pv_va);

#ifdef VERBOSE_INIT_ARM
	printf("done!\n");
#endif

#if 0
	/*
	 * The IFPGA registers have just moved.
	 * Detach the diagnostic serial port and reattach at the new address.
	 */
	plcomcndetach();
	/*
	 * XXX this should only be done in main() but it useful to
	 * have output earlier ...
	 */
	consinit();
#endif

	LEDSTEP();
#ifdef VERBOSE_INIT_ARM
	printf("bootstrap done.\n");
#endif

	arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL);

	/*
	 * Pages were allocated during the secondary bootstrap for the
	 * stacks for different CPU modes.
	 * We must now set the r13 registers in the different CPU modes to
	 * point to these stacks.
	 * Since the ARM stacks use STMFD etc. we must set r13 to the top end
	 * of the stack memory.
	 */
#ifdef VERBOSE_INIT_ARM
	printf("init subsystems: stacks ");
#endif

	set_stackptr(PSR_IRQ32_MODE,
	    irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE);
	set_stackptr(PSR_ABT32_MODE,
	    abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE);
	set_stackptr(PSR_UND32_MODE,
	    undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE);

	LEDSTEP();

	/*
	 * Well we should set a data abort handler.
	 * Once things get going this will change as we will need a proper
	 * handler.
	 * Until then we will use a handler that just panics but tells us
	 * why.
	 * Initialisation of the vectors will just panic on a data abort.
	 * This just fills in a slightly better one.
	 */
#ifdef VERBOSE_INIT_ARM
	printf("vectors ");
#endif
	data_abort_handler_address = (u_int)data_abort_handler;
	prefetch_abort_handler_address = (u_int)prefetch_abort_handler;
	undefined_handler_address = (u_int)undefinedinstruction_bounce;

	/* Initialise the undefined instruction handlers */
#ifdef VERBOSE_INIT_ARM
	printf("undefined ");
#endif
	undefined_init();

	LEDSTEP();

	/* Load memory into UVM. */
#ifdef VERBOSE_INIT_ARM
	printf("page ");
#endif
	uvm_setpagesize();	/* initialize PAGE_SIZE-dependent variables */
	uvm_page_physload(atop(physical_freestart), atop(physical_freeend),
	    atop(physical_freestart), atop(physical_freeend),
	    VM_FREELIST_DEFAULT);

	LEDSTEP();
	/* Boot strap pmap telling it where the kernel page table is */
#ifdef VERBOSE_INIT_ARM
	printf("pmap ");
#endif
	pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE);

	LEDSTEP();

	/* Setup the IRQ system */
#ifdef VERBOSE_INIT_ARM
	printf("irq ");
#endif
	/* XXX irq_init(); */

#ifdef VERBOSE_INIT_ARM
	printf("done.\n");
#endif

#ifdef BOOTHOWTO_INIT
	boothowto |= BOOTHOWTO_INIT;
#endif
	{
		uint8_t  gpio = ~gpio8(GPIO_PDATF);
		
		if (gpio & (1<<5)) /* SW3 */
			boothowto ^= RB_SINGLE;
		if (gpio & (1<<7)) /* SW7 */
			boothowto ^= RB_KDB;
#ifdef VERBOSE_INIT_ARM
		printf( "sw: %x boothowto: %x\n", gpio, boothowto );
#endif
	}

#ifdef KGDB
	if (boothowto & RB_KDB) {
		kgdb_debug_init = 1;
		kgdb_connect(1);
	}
#endif

#ifdef DDB
	db_machine_init();
	if (boothowto & RB_KDB)
		Debugger();
#endif

	/* We return the new stack pointer address */
	return (kernelstack.pv_va + USPACE_SVC_STACK_TOP);
}
コード例 #29
0
ファイル: iq80321_machdep.c プロジェクト: lacombar/netbsd-alc
/*
 * u_int initarm(...)
 *
 * Initial entry point on startup. This gets called before main() is
 * entered.
 * It should be responsible for setting up everything that must be
 * in place when main is called.
 * This includes
 *   Taking a copy of the boot configuration structure.
 *   Initialising the physical console so characters can be printed.
 *   Setting up page tables for the kernel
 *   Relocating the kernel to the bottom of physical memory
 */
u_int
initarm(void *arg)
{
	extern vaddr_t xscale_cache_clean_addr;
#ifdef DIAGNOSTIC
	extern vsize_t xscale_minidata_clean_size;
#endif
	int loop;
	int loop1;
	u_int l1pagetable;
	paddr_t memstart;
	psize_t memsize;

	/*
	 * Clear out the 7-segment display.  Whee, the first visual
	 * indication that we're running kernel code.
	 */
	iq80321_7seg(' ', ' ');

	/* Calibrate the delay loop. */
	i80321_calibrate_delay();
	i80321_hardclock_hook = iq80321_hardclock_hook;

	/*
	 * Since we map the on-board devices VA==PA, and the kernel
	 * is running VA==PA, it's possible for us to initialize
	 * the console now.
	 */
	consinit();

#ifdef VERBOSE_INIT_ARM
	/* Talk to the user */
	printf("\nNetBSD/evbarm (IQ80321) booting ...\n");
#endif

	/*
	 * Heads up ... Setup the CPU / MMU / TLB functions
	 */
	if (set_cpufuncs())
		panic("CPU not recognized!");

	/*
	 * We are currently running with the MMU enabled and the
	 * entire address space mapped VA==PA, except for the
	 * first 64M of RAM is also double-mapped at 0xc0000000.
	 * There is an L1 page table at 0xa0004000.
	 */

	/*
	 * Fetch the SDRAM start/size from the i80321 SDRAM configuration
	 * registers.
	 */
	i80321_sdram_bounds(&obio_bs_tag, VERDE_PMMR_BASE + VERDE_MCU_BASE,
	    &memstart, &memsize);

#ifdef VERBOSE_INIT_ARM
	printf("initarm: Configuring system ...\n");
#endif

	/* Fake bootconfig structure for the benefit of pmap.c */
	/* XXX must make the memory description h/w independent */
	bootconfig.dramblocks = 1;
	bootconfig.dram[0].address = memstart;
	bootconfig.dram[0].pages = memsize / PAGE_SIZE;

	/*
	 * Set up the variables that define the availablilty of
	 * physical memory.  For now, we're going to set
	 * physical_freestart to 0xa0200000 (where the kernel
	 * was loaded), and allocate the memory we need downwards.
	 * If we get too close to the L1 table that we set up, we
	 * will panic.  We will update physical_freestart and
	 * physical_freeend later to reflect what pmap_bootstrap()
	 * wants to see.
	 *
	 * XXX pmap_bootstrap() needs an enema.
	 */
	physical_start = bootconfig.dram[0].address;
	physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE);

	physical_freestart = 0xa0009000UL;
	physical_freeend = 0xa0200000UL;

	physmem = (physical_end - physical_start) / PAGE_SIZE;

#ifdef VERBOSE_INIT_ARM
	/* Tell the user about the memory */
	printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem,
	    physical_start, physical_end - 1);
#endif

	/*
	 * Okay, the kernel starts 2MB in from the bottom of physical
	 * memory.  We are going to allocate our bootstrap pages downwards
	 * from there.
	 *
	 * We need to allocate some fixed page tables to get the kernel
	 * going.  We allocate one page directory and a number of page
	 * tables and store the physical addresses in the kernel_pt_table
	 * array.
	 *
	 * The kernel page directory must be on a 16K boundary.  The page
	 * tables must be on 4K boundaries.  What we do is allocate the
	 * page directory on the first 16K boundary that we encounter, and
	 * the page tables on 4K boundaries otherwise.  Since we allocate
	 * at least 3 L2 page tables, we are guaranteed to encounter at
	 * least one 16K aligned region.
	 */

#ifdef VERBOSE_INIT_ARM
	printf("Allocating page tables\n");
#endif

	free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE;

#ifdef VERBOSE_INIT_ARM
	printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n",
	       physical_freestart, free_pages, free_pages);
#endif

	/* Define a macro to simplify memory allocation */
#define	valloc_pages(var, np)				\
	alloc_pages((var).pv_pa, (np));			\
	(var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start;

#define alloc_pages(var, np)				\
	physical_freeend -= ((np) * PAGE_SIZE);		\
	if (physical_freeend < physical_freestart)	\
		panic("initarm: out of memory");	\
	(var) = physical_freeend;			\
	free_pages -= (np);				\
	memset((char *)(var), 0, ((np) * PAGE_SIZE));

	loop1 = 0;
	kernel_l1pt.pv_pa = 0;
	kernel_l1pt.pv_va = 0;
	for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) {
		/* Are we 16KB aligned for an L1 ? */
		if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0
		    && kernel_l1pt.pv_pa == 0) {
			valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE);
		} else {
			valloc_pages(kernel_pt_table[loop1],
			    L2_TABLE_SIZE / PAGE_SIZE);
			++loop1;
		}
	}

	/* This should never be able to happen but better confirm that. */
	if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0)
		panic("initarm: Failed to align the kernel page directory");

	/*
	 * Allocate a page for the system page mapped to V0x00000000
	 * This page will just contain the system vectors and can be
	 * shared by all processes.
	 */
	alloc_pages(systempage.pv_pa, 1);

	/* Allocate stacks for all modes */
	valloc_pages(irqstack, IRQ_STACK_SIZE);
	valloc_pages(abtstack, ABT_STACK_SIZE);
	valloc_pages(undstack, UND_STACK_SIZE);
	valloc_pages(kernelstack, UPAGES);

	/* Allocate enough pages for cleaning the Mini-Data cache. */
	KASSERT(xscale_minidata_clean_size <= PAGE_SIZE);
	valloc_pages(minidataclean, 1);

#ifdef VERBOSE_INIT_ARM
	printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa,
	    irqstack.pv_va); 
	printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa,
	    abtstack.pv_va); 
	printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa,
	    undstack.pv_va); 
	printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa,
	    kernelstack.pv_va); 
#endif

	/*
	 * XXX Defer this to later so that we can reclaim the memory
	 * XXX used by the RedBoot page tables.
	 */
	alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE);

	/*
	 * Ok we have allocated physical pages for the primary kernel
	 * page tables
	 */

#ifdef VERBOSE_INIT_ARM
	printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa);
#endif

	/*
	 * Now we start construction of the L1 page table
	 * We start by mapping the L2 page tables into the L1.
	 * This means that we can replace L1 mappings later on if necessary
	 */
	l1pagetable = kernel_l1pt.pv_pa;

	/* Map the L2 pages tables in the L1 page table */
	pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1),
	    &kernel_pt_table[KERNEL_PT_SYS]);
	for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++)
		pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000,
		    &kernel_pt_table[KERNEL_PT_KERNEL + loop]);
	pmap_link_l2pt(l1pagetable, IQ80321_IOPXS_VBASE,
	    &kernel_pt_table[KERNEL_PT_IOPXS]);
	for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++)
		pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000,
		    &kernel_pt_table[KERNEL_PT_VMDATA + loop]);

	/* update the top of the kernel VM */
	pmap_curmaxkvaddr =
	    KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000);

#ifdef VERBOSE_INIT_ARM
	printf("Mapping kernel\n");
#endif

	/* Now we fill in the L2 pagetable for the kernel static code/data */
	{
		extern char etext[], _end[];
		size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE;
		size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE;
		u_int logical;

		textsize = (textsize + PGOFSET) & ~PGOFSET;
		totalsize = (totalsize + PGOFSET) & ~PGOFSET;
		
		logical = 0x00200000;	/* offset of kernel in RAM */

		logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical,
		    physical_start + logical, textsize,
		    VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
		logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical,
		    physical_start + logical, totalsize - textsize,
		    VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
	}

#ifdef VERBOSE_INIT_ARM
	printf("Constructing L2 page tables\n");
#endif

	/* Map the stack pages */
	pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa,
	    IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
	pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa,
	    ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
	pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa,
	    UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
	pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa,
	    UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);

	pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa,
	    L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);

	for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) {
		pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va,
		    kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE,
		    VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
	}

	/* Map the Mini-Data cache clean area. */
	xscale_setup_minidata(l1pagetable, minidataclean.pv_va,
	    minidataclean.pv_pa);

	/* Map the vector page. */
	pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa,
	    VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);

	/* Map the statically mapped devices. */
	pmap_devmap_bootstrap(l1pagetable, iq80321_devmap);

	/*
	 * Give the XScale global cache clean code an appropriately
	 * sized chunk of unmapped VA space starting at 0xff000000
	 * (our device mappings end before this address).
	 */
	xscale_cache_clean_addr = 0xff000000U;

	/*
	 * Now we have the real page tables in place so we can switch to them.
	 * Once this is done we will be running with the REAL kernel page
	 * tables.
	 */

	/*
	 * Update the physical_freestart/physical_freeend/free_pages
	 * variables.
	 */
	{
		extern char _end[];

		physical_freestart = physical_start +
		    (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) -
		     KERNEL_BASE);
		physical_freeend = physical_end;
		free_pages =
		    (physical_freeend - physical_freestart) / PAGE_SIZE;
	}

	/* Switch tables */
#ifdef VERBOSE_INIT_ARM
	printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n",
	       physical_freestart, free_pages, free_pages);
	printf("switching to new L1 page table  @%#lx...", kernel_l1pt.pv_pa);
#endif
	cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT);
	setttb(kernel_l1pt.pv_pa);
	cpu_tlb_flushID();
	cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2));

	/*
	 * Moved from cpu_startup() as data_abort_handler() references
	 * this during uvm init
	 */
	proc0paddr = (struct user *)kernelstack.pv_va;
	lwp0.l_addr = proc0paddr;

#ifdef VERBOSE_INIT_ARM
	printf("done!\n");
#endif

#ifdef VERBOSE_INIT_ARM
	printf("bootstrap done.\n");
#endif

	arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL);

	/*
	 * Pages were allocated during the secondary bootstrap for the
	 * stacks for different CPU modes.
	 * We must now set the r13 registers in the different CPU modes to
	 * point to these stacks.
	 * Since the ARM stacks use STMFD etc. we must set r13 to the top end
	 * of the stack memory.
	 */
#ifdef VERBOSE_INIT_ARM
	printf("init subsystems: stacks ");
#endif

	set_stackptr(PSR_IRQ32_MODE,
	    irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE);
	set_stackptr(PSR_ABT32_MODE,
	    abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE);
	set_stackptr(PSR_UND32_MODE,
	    undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE);

	/*
	 * Well we should set a data abort handler.
	 * Once things get going this will change as we will need a proper
	 * handler.
	 * Until then we will use a handler that just panics but tells us
	 * why.
	 * Initialisation of the vectors will just panic on a data abort.
	 * This just fills in a slightly better one.
	 */
#ifdef VERBOSE_INIT_ARM
	printf("vectors ");
#endif
	data_abort_handler_address = (u_int)data_abort_handler;
	prefetch_abort_handler_address = (u_int)prefetch_abort_handler;
	undefined_handler_address = (u_int)undefinedinstruction_bounce;

	/* Initialise the undefined instruction handlers */
#ifdef VERBOSE_INIT_ARM
	printf("undefined ");
#endif
	undefined_init();

	/* Load memory into UVM. */
#ifdef VERBOSE_INIT_ARM
	printf("page ");
#endif
	uvm_setpagesize();	/* initialize PAGE_SIZE-dependent variables */
	uvm_page_physload(atop(physical_freestart), atop(physical_freeend),
	    atop(physical_freestart), atop(physical_freeend),
	    VM_FREELIST_DEFAULT);

	/* Boot strap pmap telling it where the kernel page table is */
#ifdef VERBOSE_INIT_ARM
	printf("pmap ");
#endif
	pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE);

	/* Setup the IRQ system */
#ifdef VERBOSE_INIT_ARM
	printf("irq ");
#endif
	i80321_intr_init();

#ifdef VERBOSE_INIT_ARM
	printf("done.\n");
#endif

#ifdef BOOTHOWTO
	boothowto = BOOTHOWTO;
#endif

#if NKSYMS || defined(DDB) || defined(LKM)
	/* Firmware doesn't load symbols. */
	ksyms_init(0, NULL, NULL);
#endif

#ifdef DDB
	db_machine_init();
	if (boothowto & RB_KDB)
		Debugger();
#endif

	/* We return the new stack pointer address */
	return(kernelstack.pv_va + USPACE_SVC_STACK_TOP);
}
コード例 #30
0
vaddr_t
initarm_common(vaddr_t kvm_base, vsize_t kvm_size,
	const struct boot_physmem *bp, size_t nbp)
{
	struct bootmem_info * const bmi = &bootmem_info;

#ifdef VERBOSE_INIT_ARM
	printf("nfreeblocks = %u, free_pages = %d (%#x)\n",
	    bmi->bmi_nfreeblocks, bmi->bmi_freepages,
	    bmi->bmi_freepages);
#endif

	/*
	 * Moved from cpu_startup() as data_abort_handler() references
	 * this during uvm init.
	 */
	uvm_lwp_setuarea(&lwp0, kernelstack.pv_va);

#ifdef VERBOSE_INIT_ARM
	printf("bootstrap done.\n");
#endif

#ifdef VERBOSE_INIT_ARM
	printf("vectors");
#endif
	arm32_vector_init(systempage.pv_va, ARM_VEC_ALL);
#ifdef VERBOSE_INIT_ARM
	printf(" %#"PRIxVADDR"\n", vector_page);
#endif

	/*
	 * Pages were allocated during the secondary bootstrap for the
	 * stacks for different CPU modes.
	 * We must now set the r13 registers in the different CPU modes to
	 * point to these stacks.
	 * Since the ARM stacks use STMFD etc. we must set r13 to the top end
	 * of the stack memory.
	 */
#ifdef VERBOSE_INIT_ARM
	printf("init subsystems: stacks ");
#endif
	set_stackptr(PSR_FIQ32_MODE,
	    fiqstack.pv_va + FIQ_STACK_SIZE * PAGE_SIZE);
	set_stackptr(PSR_IRQ32_MODE,
	    irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE);
	set_stackptr(PSR_ABT32_MODE,
	    abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE);
	set_stackptr(PSR_UND32_MODE,
	    undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE);

	/*
	 * Well we should set a data abort handler.
	 * Once things get going this will change as we will need a proper
	 * handler.
	 * Until then we will use a handler that just panics but tells us
	 * why.
	 * Initialisation of the vectors will just panic on a data abort.
	 * This just fills in a slightly better one.
	 */
#ifdef VERBOSE_INIT_ARM
	printf("vectors ");
#endif
	data_abort_handler_address = (u_int)data_abort_handler;
	prefetch_abort_handler_address = (u_int)prefetch_abort_handler;
	undefined_handler_address = (u_int)undefinedinstruction_bounce;

	/* Initialise the undefined instruction handlers */
#ifdef VERBOSE_INIT_ARM
	printf("undefined ");
#endif
	undefined_init();

	/* Load memory into UVM. */
#ifdef VERBOSE_INIT_ARM
	printf("page ");
#endif
	uvm_setpagesize();	/* initialize PAGE_SIZE-dependent variables */

#ifdef VERBOSE_INIT_ARM
	printf("pmap_physload ");
#endif
	KASSERT(bp != NULL || nbp == 0);
	KASSERT(bp == NULL || nbp != 0);

	for (size_t i = 0; i < bmi->bmi_nfreeblocks; i++) {
		pv_addr_t * const pv = &bmi->bmi_freeblocks[i];
		paddr_t start = atop(pv->pv_pa);
		const paddr_t end = start + atop(pv->pv_size);

		while (start < end) {
			int vm_freelist = VM_FREELIST_DEFAULT;
			paddr_t segend = end;
			/*
			 * This assumes the bp list is sorted in ascending
			 * order.
			 */
			for (size_t j = 0; j < nbp; j++) {
				paddr_t bp_start = bp[j].bp_start;
				paddr_t bp_end = bp_start + bp[j].bp_pages;
				if (start < bp_start) {
					if (segend > bp_start) {
						segend = bp_start;
					}
					break;
				}
				if (start < bp_end) {
					if (segend > bp_end) {
						segend = bp_end;
					}
					vm_freelist = bp[j].bp_freelist;
					break;
				}
			}
	
			uvm_page_physload(start, segend, start, segend,
			    vm_freelist);
			start = segend;
		}
	}

	/* Boot strap pmap telling it where the kernel page table is */
#ifdef VERBOSE_INIT_ARM
	printf("pmap ");
#endif
	pmap_bootstrap(kvm_base, kvm_base + kvm_size);
   
#ifdef __HAVE_MEMORY_DISK__
	md_root_setconf(memory_disk, sizeof memory_disk);
#endif

#ifdef BOOTHOWTO
	boothowto |= BOOTHOWTO;
#endif

#ifdef KGDB
	if (boothowto & RB_KDB) {
		kgdb_debug_init = 1;
		kgdb_connect(1);
	}
#endif

#ifdef DDB
	db_machine_init();
	ddb_init(0, NULL, NULL);

	if (boothowto & RB_KDB)
		Debugger();
#endif

#ifdef VERBOSE_INIT_ARM
	printf("done.\n");
#endif

	/* We return the new stack pointer address */
	return kernelstack.pv_va + USPACE_SVC_STACK_TOP;
}