/*
* 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);
}
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);
}
/*
* 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)
{
pmap_devmap_register(devmap);
awin_bootstrap(AWIN_CORE_VBASE, CONADDR_VA);
/* Heads up ... Setup the CPU / MMU / TLB functions. */
if (set_cpufuncs())
panic("cpu not recognized!");
/* The console is going to try to map things. Give pmap a devmap. */
consinit();
#ifdef VERBOSE_INIT_ARM
printf("\nuboot arg = %#x, %#x, %#x, %#x\n",
uboot_args[0], uboot_args[1], uboot_args[2], uboot_args[3]);
#endif
#ifdef KGDB
kgdb_port_init();
#endif
cpu_reset_address = awin_wdog_reset;
#ifdef VERBOSE_INIT_ARM
/* Talk to the user */
printf("\nNetBSD/evbarm (cubie) 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");
#if defined(CPU_CORTEXA7) || defined(CPU_CORTEXA9) || defined(CPU_CORTEXA15)
printf("initarm: cbar=%#x\n", armreg_cbar_read());
#endif
#endif
/*
* Set up the variables that define the availability of physical
* memory.
*/
psize_t ram_size = awin_memprobe();
/*
* If MEMSIZE specified less than what we really have, limit ourselves
* to that.
*/
#ifdef MEMSIZE
if (ram_size == 0 || ram_size > (unsigned)MEMSIZE * 1024 * 1024)
ram_size = (unsigned)MEMSIZE * 1024 * 1024;
#else
KASSERTMSG(ram_size > 0, "RAM size unknown and MEMSIZE undefined");
#endif
/* Fake bootconfig structure for the benefit of pmap.c. */
bootconfig.dramblocks = 1;
bootconfig.dram[0].address = AWIN_SDRAM_PBASE;
bootconfig.dram[0].pages = ram_size / PAGE_SIZE;
#ifdef __HAVE_MM_MD_DIRECT_MAPPED_PHYS
const bool mapallmem_p = true;
KASSERT(ram_size <= KERNEL_VM_BASE - KERNEL_BASE);
#else
const bool mapallmem_p = false;
#endif
KASSERT((armreg_pfr1_read() & ARM_PFR1_SEC_MASK) != 0);
arm32_bootmem_init(bootconfig.dram[0].address, ram_size,
KERNEL_BASE_PHYS);
arm32_kernel_vm_init(KERNEL_VM_BASE, ARM_VECTORS_LOW, 0, devmap,
mapallmem_p);
if (mapallmem_p) {
/*
* "bootargs" env variable is passed as 4th argument
* to kernel but it's using the physical address and
* we to convert that to a virtual address.
*/
if (uboot_args[3] - AWIN_SDRAM_PBASE < ram_size) {
const char * const args = (const char *)
(uboot_args[3] + KERNEL_PHYS_VOFFSET);
strlcpy(bootargs, args, sizeof(bootargs));
}
}
boot_args = bootargs;
parse_mi_bootargs(boot_args);
/* we've a specific device_register routine */
evbarm_device_register = cubie_device_register;
#if NAWIN_FB > 0
char *ptr;
if (get_bootconf_option(boot_args, "console",
BOOTOPT_TYPE_STRING, &ptr) && strncmp(ptr, "fb", 2) == 0) {
use_fb_console = true;
}
#endif
return initarm_common(KERNEL_VM_BASE, KERNEL_VM_SIZE, NULL, 0);
}
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(®ion, gdtstore, DYNSEL_START - 1);
lgdt(®ion);
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();
}
/*
* 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)
{
pmap_devmap_register(devmap);
awin_bootstrap(AWIN_CORE_VBASE, CONADDR_VA);
/* Heads up ... Setup the CPU / MMU / TLB functions. */
if (set_cpufuncs())
panic("cpu not recognized!");
/* The console is going to try to map things. Give pmap a devmap. */
consinit();
#ifdef VERBOSE_INIT_ARM
printf("\nuboot arg = %#"PRIxPTR", %#"PRIxPTR", %#"PRIxPTR", %#"PRIxPTR"\n",
uboot_args[0], uboot_args[1], uboot_args[2], uboot_args[3]);
#endif
#ifdef KGDB
kgdb_port_init();
#endif
cpu_reset_address = awin_wdog_reset;
#ifdef VERBOSE_INIT_ARM
/* Talk to the user */
printf("\nNetBSD/evbarm (" BOARDTYPE ") 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");
#if defined(CPU_CORTEXA7) || defined(CPU_CORTEXA9) || defined(CPU_CORTEXA15)
if (!CPU_ID_CORTEX_A8_P(curcpu()->ci_arm_cpuid)) {
printf("initarm: cbar=%#x\n", armreg_cbar_read());
}
#endif
#endif
/*
* Set up the variables that define the availability of physical
* memory.
*/
psize_t ram_size = awin_memprobe();
#if AWIN_board == AWIN_cubieboard
/* the cubietruck has 2GB whereas the cubieboards only has 1GB */
cubietruck_p = (ram_size == 0x80000000);
#endif
/*
* If MEMSIZE specified less than what we really have, limit ourselves
* to that.
*/
#ifdef MEMSIZE
if (ram_size == 0 || ram_size > (unsigned)MEMSIZE * 1024 * 1024)
ram_size = (unsigned)MEMSIZE * 1024 * 1024;
#else
KASSERTMSG(ram_size > 0, "RAM size unknown and MEMSIZE undefined");
#endif
/*
* Configure DMA tags
*/
awin_dma_bootstrap(ram_size);
/* Fake bootconfig structure for the benefit of pmap.c. */
bootconfig.dramblocks = 1;
bootconfig.dram[0].address = AWIN_SDRAM_PBASE;
bootconfig.dram[0].pages = ram_size / PAGE_SIZE;
#ifdef __HAVE_MM_MD_DIRECT_MAPPED_PHYS
const bool mapallmem_p = true;
#ifndef PMAP_NEED_ALLOC_POOLPAGE
if (ram_size > KERNEL_VM_BASE - KERNEL_BASE) {
printf("%s: dropping RAM size from %luMB to %uMB\n",
__func__, (unsigned long) (ram_size >> 20),
(KERNEL_VM_BASE - KERNEL_BASE) >> 20);
ram_size = KERNEL_VM_BASE - KERNEL_BASE;
}
/*
* 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)
{
/*
* Heads up ... Setup the CPU / MMU / TLB functions
*/
if (set_cpufuncs())
panic("cpu not recognized!");
/* map some peripheral registers */
pmap_devmap_bootstrap((vaddr_t)armreg_ttbr_read() & -L1_TABLE_SIZE,
netwalker_devmap);
cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT);
/* Register devmap for devices we mapped in start */
pmap_devmap_register(netwalker_devmap);
setup_ioports();
consinit();
#ifdef NO_POWERSAVE
cpu_do_powersave=0;
#endif
init_clocks();
#ifdef KGDB
kgdb_port_init();
#endif
/* Talk to the user */
printf("\nNetBSD/evbarm (" ___STRING(EVBARM_BOARDTYPE) ") booting ...\n");
#ifdef BOOT_ARGS
char mi_bootargs[] = BOOT_ARGS;
parse_mi_bootargs(mi_bootargs);
#endif
bootargs[0] = '\0';
#if defined(VERBOSE_INIT_ARM) || 1
printf("initarm: Configuring system");
printf(", CLIDR=%010o CTR=%#x",
armreg_clidr_read(), armreg_ctr_read());
printf("\n");
#endif
/*
* Ok we have the following memory map
*
* Physical Address Range Description
* ----------------------- ----------------------------------
*
* 0x90000000 - 0xAFFFFFFF DDR SDRAM (512MByte)
*
* 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.
*/
#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 * 1024 * 1024) / PAGE_SIZE;
psize_t ram_size = bootconfig.dram[0].pages * PAGE_SIZE;
#ifdef __HAVE_MM_MD_DIRECT_MAPPED_PHYS
if (ram_size > KERNEL_VM_BASE - KERNEL_BASE) {
printf("%s: dropping RAM size from %luMB to %uMB\n",
__func__, (unsigned long) (ram_size >> 20),
(KERNEL_VM_BASE - KERNEL_BASE) >> 20);
ram_size = KERNEL_VM_BASE - KERNEL_BASE;
}
u_int
initarm(void *arg)
{
const struct pmap_devmap const *devmap;
bus_addr_t rambase;
const psize_t ram_reserve = 0x200000;
psize_t ram_size;
/* allocate/map our basic memory mapping */
switch (EXYNOS_PRODUCT_FAMILY(exynos_soc_id)) {
#if defined(EXYNOS4)
case EXYNOS4_PRODUCT_FAMILY:
devmap = e4_devmap;
rambase = EXYNOS4_SDRAM_PBASE;
break;
#endif
#if defined(EXYNOS5)
case EXYNOS5_PRODUCT_FAMILY:
devmap = e5_devmap;
rambase = EXYNOS5_SDRAM_PBASE;
break;
#endif
default:
/* Won't work, but... */
panic("Unknown product family %llx",
EXYNOS_PRODUCT_FAMILY(exynos_soc_id));
}
pmap_devmap_register(devmap);
/* bootstrap soc. uart_address is determined in odroid_start */
paddr_t uart_address = armreg_tpidruro_read();
exynos_bootstrap(EXYNOS_CORE_VBASE, EXYNOS_IOPHYSTOVIRT(uart_address));
/* set up CPU / MMU / TLB functions */
if (set_cpufuncs())
panic("cpu not recognized!");
/* get normal console working */
consinit();
#ifdef KGDB
kgdb_port_init();
#endif
#ifdef VERBOSE_INIT_ARM
printf("\nuboot arg = %#"PRIxPTR", %#"PRIxPTR", %#"PRIxPTR", %#"PRIxPTR"\n",
uboot_args[0], uboot_args[1], uboot_args[2], uboot_args[3]);
printf("Exynos SoC ID %08x\n", exynos_soc_id);
printf("initarm: cbar=%#x\n", armreg_cbar_read());
#endif
/* determine cpu0 clock rate */
exynos_clocks_bootstrap();
#ifdef VERBOSE_INIT_ARM
printf("CPU0 now running on %"PRIu64" Mhz\n", exynos_get_cpufreq()/(1000*1000));
#endif
#if NARML2CC > 0
if (CPU_ID_CORTEX_A9_P(curcpu()->ci_arm_cpuid)) {
/* probe and enable the PL310 L2CC */
const bus_space_handle_t pl310_bh =
EXYNOS_IOPHYSTOVIRT(armreg_cbar_read());
#ifdef ARM_TRUSTZONE_FIRMWARE
exynos4_l2cc_init();
#endif
arml2cc_init(&exynos_bs_tag, pl310_bh, 0x2000);
}
#endif
cpu_reset_address = exynos_wdt_reset;
#ifdef VERBOSE_INIT_ARM
printf("\nNetBSD/evbarm (odroid) booting ...\n");
#endif
#ifdef BOOT_ARGS
char mi_bootargs[] = BOOT_ARGS;
parse_mi_bootargs(mi_bootargs);
#endif
boot_args = bootargs;
parse_mi_bootargs(boot_args);
exynos_extract_mac_adress();
/*
* Determine physical memory by looking at the PoP package. This PoP
* package ID seems to be only available on Exynos4
*
* First assume the default 2Gb of memory, dictated by mapping too
*/
ram_size = (psize_t) 0xC0000000 - 0x40000000;
#if defined(EXYNOS4)
switch (exynos_pop_id) {
case EXYNOS_PACKAGE_ID_2_GIG:
KASSERT(ram_size <= 2UL*1024*1024*1024);
break;
default:
printf("Unknown PoP package id 0x%08x, assuming 1Gb\n",
exynos_pop_id);
ram_size = (psize_t) 0x10000000;
}
#endif
/* Fake bootconfig structure for the benefit of pmap.c. */
bootconfig.dramblocks = 1;
bootconfig.dram[0].address = rambase;
bootconfig.dram[0].pages = ram_size / PAGE_SIZE;
#ifdef __HAVE_MM_MD_DIRECT_MAPPED_PHYS
const bool mapallmem_p = true;
#ifndef PMAP_NEED_ALLOC_POOLPAGE
if (ram_size > KERNEL_VM_BASE - KERNEL_BASE) {
printf("%s: dropping RAM size from %luMB to %uMB\n",
__func__, (unsigned long) (ram_size >> 20),
(KERNEL_VM_BASE - KERNEL_BASE) >> 20);
ram_size = KERNEL_VM_BASE - KERNEL_BASE;
}
/*
* 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);
}