Exemplo n.º 1
0
Arquivo: dvma.c Projeto: MarginC/kame
void
dvma_init()
{
	vm_offset_t segmap_addr;

	/*
	 * Create phys_map covering the entire DVMA space,
	 * then allocate the segment pool from that.  The
	 * remainder will be used as the DVMA page pool.
	 */
	phys_map = uvm_map_create(pmap_kernel(),
		DVMA_MAP_BASE, DVMA_MAP_END, 1);
	if (phys_map == NULL)
		panic("unable to create DVMA map");

	/*
	 * Reserve the DVMA space used for segment remapping.
	 * The remainder of phys_map is used for DVMA scratch
	 * memory pages (i.e. driver control blocks, etc.)
	 */
	segmap_addr = uvm_km_valloc_wait(phys_map, dvma_segmap_size);
	if (segmap_addr != DVMA_MAP_BASE)
		panic("dvma_init: unable to allocate DVMA segments");

	/*
	 * Create the VM pool used for mapping whole segments
	 * into DVMA space for the purpose of data transfer.
	 */
	rminit(dvma_segmap, dvma_segmap_size, segmap_addr,
		   "dvma_segmap", NUM_DVMA_SEGS);
}
Exemplo n.º 2
0
/*
 * uvm_km_suballoc: allocate a submap in the kernel map.   once a submap
 * is allocated all references to that area of VM must go through it.  this
 * allows the locking of VAs in kernel_map to be broken up into regions.
 *
 * => if `fixed' is true, *min specifies where the region described
 *      by the submap must start
 * => if submap is non NULL we use that as the submap, otherwise we
 *	alloc a new map
 */
struct vm_map *
uvm_km_suballoc(struct vm_map *map, vaddr_t *min, vaddr_t *max, vsize_t size,
    int flags, boolean_t fixed, struct vm_map *submap)
{
	int mapflags = UVM_FLAG_NOMERGE | (fixed ? UVM_FLAG_FIXED : 0);

	size = round_page(size);	/* round up to pagesize */

	/*
	 * first allocate a blank spot in the parent map
	 */

	if (uvm_map(map, min, size, NULL, UVM_UNKNOWN_OFFSET, 0,
	    UVM_MAPFLAG(UVM_PROT_ALL, UVM_PROT_ALL, UVM_INH_NONE,
	    UVM_ADV_RANDOM, mapflags)) != 0) {
	       panic("uvm_km_suballoc: unable to allocate space in parent map");
	}

	/*
	 * set VM bounds (min is filled in by uvm_map)
	 */

	*max = *min + size;

	/*
	 * add references to pmap and create or init the submap
	 */

	pmap_reference(vm_map_pmap(map));
	if (submap == NULL) {
		submap = uvm_map_create(vm_map_pmap(map), *min, *max, flags);
		if (submap == NULL)
			panic("uvm_km_suballoc: unable to create submap");
	} else {
		uvm_map_setup(submap, *min, *max, flags);
		submap->pmap = vm_map_pmap(map);
	}

	/*
	 * now let uvm_map_submap plug in it...
	 */

	if (uvm_map_submap(map, *min, *max, submap) != 0)
		panic("uvm_km_suballoc: submap allocation failed");

	return(submap);
}
Exemplo n.º 3
0
void 
dvma_init(void)
{
	vaddr_t segmap_addr;

	/*
	 * Create phys_map covering the entire DVMA space,
	 * then allocate the segment pool from that.  The
	 * remainder will be used as the DVMA page pool.
	 *
	 * Note that no INTRSAFE is needed here because the
	 * dvma_extent manages things handled in interrupt
	 * context.
	 */
	phys_map = uvm_map_create(pmap_kernel(),
	    DVMA_MAP_BASE, DVMA_MAP_END, 0);
	if (phys_map == NULL)
		panic("unable to create DVMA map");

	/*
	 * Reserve the DVMA space used for segment remapping.
	 * The remainder of phys_map is used for DVMA scratch
	 * memory pages (i.e. driver control blocks, etc.)
	 */
	segmap_addr = uvm_km_alloc(phys_map, dvma_segmap_size, 0,
	    UVM_KMF_VAONLY | UVM_KMF_WAITVA);
	if (segmap_addr != DVMA_MAP_BASE)
		panic("dvma_init: unable to allocate DVMA segments");

	/*
	 * Create the VM pool used for mapping whole segments
	 * into DVMA space for the purpose of data transfer.
	 */
	dvma_extent = extent_create("dvma", segmap_addr,
	    segmap_addr + (dvma_segmap_size - 1), M_DEVBUF,
	    NULL, 0, EX_NOCOALESCE|EX_NOWAIT);
}
Exemplo n.º 4
0
/*
 * Machine-dependent startup code
 */
void
cpu_startup()
{
	caddr_t v;
	int sz;
#ifdef DEBUG
	extern int pmapdebug;
	int opmapdebug = pmapdebug;
#endif
	vaddr_t minaddr, maxaddr;
	extern struct user *proc0paddr;

#ifdef DEBUG
	pmapdebug = 0;
#endif

	if (CPU_ISSUN4M) {
		extern int stackgap_random;

		stackgap_random = STACKGAP_RANDOM_SUN4M;
	}

	/*
	 * fix message buffer mapping, note phys addr of msgbuf is 0
	 */
	pmap_map(MSGBUF_VA, 0, MSGBUFSIZE, VM_PROT_READ|VM_PROT_WRITE);
	initmsgbuf((caddr_t)(MSGBUF_VA + (CPU_ISSUN4 ? 4096 : 0)), MSGBUFSIZE);

	proc0.p_addr = proc0paddr;

	/*
	 * Good {morning,afternoon,evening,night}.
	 */
	printf(version);
	/*identifycpu();*/
	printf("real mem = %u (%uMB)\n", ptoa(physmem),
	    ptoa(physmem)/1024/1024);

	/*
	 * Find out how much space we need, allocate it,
	 * and then give everything true virtual addresses.
	 */
	sz = (int)allocsys((caddr_t)0);

	if ((v = (caddr_t)uvm_km_alloc(kernel_map, round_page(sz))) == 0)
		panic("startup: no room for tables");

	if (allocsys(v) - v != sz)
		panic("startup: table size inconsistency");

	/*
	 * Determine how many buffers to allocate.
	 * We allocate bufcachepercent% of memory for buffer space.
	 */
	if (bufpages == 0)
		bufpages = physmem * bufcachepercent / 100;

	/* Restrict to at most 25% filled kvm */
	if (bufpages >
	    (VM_MAX_KERNEL_ADDRESS-VM_MIN_KERNEL_ADDRESS) / PAGE_SIZE / 4) 
		bufpages = (VM_MAX_KERNEL_ADDRESS-VM_MIN_KERNEL_ADDRESS) /
		    PAGE_SIZE / 4;

	/*
	 * Allocate a submap for exec arguments.  This map effectively
	 * limits the number of processes exec'ing at any time.
	 */
	minaddr = vm_map_min(kernel_map);
	exec_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr,
				 16*NCARGS, VM_MAP_PAGEABLE, FALSE, NULL);

	/*
	 * Allocate a map for physio.  Others use a submap of the kernel
	 * map, but we want one completely separate, even though it uses
	 * the same pmap.
	 */
	dvma_base = CPU_ISSUN4M ? DVMA4M_BASE : DVMA_BASE;
	dvma_end = CPU_ISSUN4M ? DVMA4M_END : DVMA_END;
#if defined(SUN4M)
	if (CPU_ISSUN4M) {
		/*
		 * The DVMA space we want partially overrides kernel_map.
		 * Allocate it in kernel_map as well to prevent it from being
		 * used for other things.
		 */
		if (uvm_map(kernel_map, &dvma_base,
		    vm_map_max(kernel_map) - dvma_base,
                    NULL, UVM_UNKNOWN_OFFSET, 0,
                    UVM_MAPFLAG(UVM_PROT_NONE, UVM_PROT_NONE, UVM_INH_NONE,
                                UVM_ADV_NORMAL, 0)))
			panic("startup: can not steal dvma map");
	}
#endif
	phys_map = uvm_map_create(pmap_kernel(), dvma_base, dvma_end,
	    VM_MAP_INTRSAFE);
	if (phys_map == NULL)
		panic("unable to create DVMA map");

	/*
	 * Allocate DVMA space and dump into a privately managed
	 * resource map for double mappings which is usable from
	 * interrupt contexts.
	 */
	if (uvm_km_valloc_wait(phys_map, (dvma_end-dvma_base)) != dvma_base)
		panic("unable to allocate from DVMA map");
	dvmamap_extent = extent_create("dvmamap", dvma_base, dvma_end,
				       M_DEVBUF, NULL, 0, EX_NOWAIT);
	if (dvmamap_extent == 0)
		panic("unable to allocate extent for dvma");

#ifdef DEBUG
	pmapdebug = opmapdebug;
#endif
	printf("avail mem = %lu (%luMB)\n", ptoa(uvmexp.free),
	    ptoa(uvmexp.free)/1024/1024);

	/*
	 * Set up buffers, so they can be used to read disk labels.
	 */
	bufinit();

	/* Early interrupt handlers initialization */
	intr_init();
}
Exemplo n.º 5
0
/*
 * Machine-dependent startup code
 */
void
cpu_startup()
{
#ifdef DEBUG
	extern int pmapdebug;
	int opmapdebug = pmapdebug;
#endif
	vaddr_t minaddr, maxaddr;
	extern struct user *proc0paddr;

#ifdef DEBUG
	pmapdebug = 0;
#endif

	/*
	 * fix message buffer mapping
	 */
	pmap_map(MSGBUF_VA, MSGBUF_PA, MSGBUF_PA + MSGBUFSIZE, UVM_PROT_RW);
	initmsgbuf((caddr_t)(MSGBUF_VA + (CPU_ISSUN4 ? 4096 : 0)), MSGBUFSIZE);

	proc0.p_addr = proc0paddr;

	/* I would print this earlier, but I want it in the message buffer */
	if (kap_maskcheck() == 0) {
		printf("WARNING: KAP M2C3 or earlier mask detected.\n"
"THE PROCESSOR IN THIS MACHINE SUFFERS FROM SEVERE HARDWARE ISSUES.\n"
"M2C3 PROCESSORS MAY RUN RELIABLY ENOUGH, OLDER WILL DEFINITELY NOT.\n\n");
	}

	/*
	 * Good {morning,afternoon,evening,night}.
	 */
	printf(version);
	/*identifycpu();*/
	printf("real mem = %d (%dMB)\n", ptoa(physmem),
	    ptoa(physmem) / 1024 / 1024);

	/*
	 * Allocate a submap for exec arguments.  This map effectively
	 * limits the number of processes exec'ing at any time.
	 */
	minaddr = vm_map_min(kernel_map);
	exec_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr,
				 16*NCARGS, VM_MAP_PAGEABLE, FALSE, NULL);

	/*
	 * Allocate a map for physio.  Others use a submap of the kernel
	 * map, but we want one completely separate, even though it uses
	 * the same pmap.
	 */
	dvma_base = CPU_ISSUN4M ? DVMA4M_BASE : DVMA_BASE;
	dvma_end = CPU_ISSUN4M ? DVMA4M_END : DVMA_END;
	phys_map = uvm_map_create(pmap_kernel(), dvma_base, dvma_end,
	    VM_MAP_INTRSAFE);
	if (phys_map == NULL)
		panic("unable to create DVMA map");

	/*
	 * Allocate DVMA space and dump into a privately managed
	 * resource map for double mappings which is usable from
	 * interrupt contexts.
	 */
	if (uvm_km_valloc_wait(phys_map, (dvma_end-dvma_base)) != dvma_base)
		panic("unable to allocate from DVMA map");
	dvmamap_extent = extent_create("dvmamap", dvma_base, dvma_end,
				       M_DEVBUF, NULL, 0, EX_NOWAIT);
	if (dvmamap_extent == 0)
		panic("unable to allocate extent for dvma");

#ifdef DEBUG
	pmapdebug = opmapdebug;
#endif
	printf("avail mem = %lu (%luMB)\n", ptoa(uvmexp.free),
	    ptoa(uvmexp.free) / 1024 / 1024);

	/*
	 * Set up buffers, so they can be used to read disk labels.
	 */
	bufinit();

	/* Early interrupt handlers initialization */
	intr_init();
}