src/sys/arch/sun3/sun3/pmap.c - diff

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Diff for /src/sys/arch/sun3/sun3/pmap.c between version 1.5 and 1.6

version 1.5, 1993/08/03 22:38:08

version 1.6, 1993/08/05 23:10:18

Line 27 vm_offset_t virtual_avail, virtual_end;

vm_offset_t avail_start, avail_end;

int msgbufmapped = 0;

struct msgbuf *msgbufp = NULL;

vm_offset_t msgbuf_pa;

caddr_t vmmap;

Line 377 void pmeg_steal(pmeg_num)

Line 376 void pmeg_steal(pmeg_num)

pmegp = pmeg_p(pmeg_num);

if (pmegp->pmeg_reserved)

panic("pmeg_steal: attempt to steal an already reserved pmeg");

mon_panic("pmeg_steal: attempt to steal an already reserved pmeg\n");

if (pmegp->pmeg_owner)

panic("pmeg_steal: pmeg is already owned");

mon_panic("pmeg_steal: pmeg is already owned\n");

pmegp->pmeg_owner = NULL;

pmegp->pmeg_reserved++; /* keep count, just in case */

remqueue(&pmeg_free_queue, pmegp);

Line 764 void pmap_common_init(pmap)

Line 763 void pmap_common_init(pmap)

void pmap_bootstrap()

{

vm_offset_t temp_seg;

vm_offset_t temp_seg, va, eva, pte;

extern vm_size_t page_size;

extern void vm_set_page_size();

unsigned int sme;

page_size = NBPG;

vm_set_page_size();

Line 781 void pmap_bootstrap()

/* pmeg_init(); done in sun3_vm_init() */

context_init();

* we need to kill off a segment to handle the stupid non-contexted

* pmeg

temp_seg = sun3_round_seg(virtual_avail);

set_temp_seg_addr(temp_seg);

mon_printf("%x virtual bytes lost allocating temporary segment for pmap\n",

temp_seg - virtual_avail);

set_segmap(temp_seg, SEGINV);

virtual_avail = temp_seg + NBSG;

sme = get_segmap(virtual_avail);

if (sme == SEGINV)

printf("bad pmeg encountered while looking for msgbuf page");

pmeg_steal(sme);

/* msgbuf */

avail_end -= NBPG;

msgbuf_pa = avail_end;

msgbufp = (struct msgbuf *) virtual_avail;

virtual_avail += NBPG;

/* could use pmap_map(), but i want to make sure.*/

pte = PG_VALID | PG_WRITE |PG_SYSTEM | PG_NC | (avail_end >>PGSHIFT);

set_pte((vm_offset_t) msgbufp, pte);

msgbufmapped = 1;

virtual_avail +=NBPG;

eva = sun3_round_up_seg(virtual_avail);

for (va = virtual_avail; va < eva; va += NBPG)

set_pte(va, PG_INVAL);

/* vmmap (used by /dev/mem */

vmmap = (caddr_t) virtual_avail;

set_pte((vm_offset_t) vmmap, PG_INVAL);

Line 795 void pmap_bootstrap()

Line 819 void pmap_bootstrap()

* vpages array:

* just some virtual addresses for temporary mappings

* in the pmap modue

* in the pmap module

tmp_vpages[0] = virtual_avail;

set_pte(tmp_vpages[0], PG_INVAL);

virtual_avail += NBPG;

tmp_vpages[1] = virtual_avail;

set_pte(tmp_vpages[0], PG_INVAL);

virtual_avail += NBPG;

virtual_avail = eva;

* we need to kill off a segment to handle the stupid non-contexted

* pmeg

temp_seg = sun3_round_seg(virtual_avail);

mon_printf("kernel virtual address begin:\t %x\n", virtual_avail);

mon_printf("%d virtual bytes lost allocating temporary segment for pmap\n",

mon_printf("kernel virtual address end:\t %x\n", virtual_end);

temp_seg - virtual_avail);

mon_printf("physical memory begin:\t %x\n", avail_start);

virtual_avail = temp_seg + NBSG;

mon_printf("physical memory end:\t %x\n", avail_end);

set_temp_seg_addr(temp_seg);

}

* Initialize the pmap module.

Line 828 pmap_init(phys_start, phys_end)

Line 848 pmap_init(phys_start, phys_end)

vm_offset_t tmp,end;

pv_init();

pmap_enter(kernel_pmap, (vm_offset_t) msgbufp, msgbuf_pa ,

VM_PROT_READ | VM_PROT_WRITE, FALSE);

msgbufmapped = 1;

}

vm_offset_t

Line 1107 void pmap_remove(pmap, sva, eva)

Line 1123 void pmap_remove(pmap, sva, eva)

va = sva;

pmegp = NULL;

while (va < eva) {

neva = sun3_round_seg(va);

neva = sun3_round_up_seg(va);

if (neva > eva)

neva = eva;

pmap_remove_range(pmap, va, neva);

Line 1636 pmap_protect(pmap, sva, eva, prot)

Line 1652 pmap_protect(pmap, sva, eva, prot)

pte_proto = pmap_pte_prot(prot);

va = sva;

while (va < eva) {

neva = sun3_round_seg(va);

neva = sun3_round_up_seg(va);

if (neva > eva)

neva = eva;

pmap_protect_range(pmap, va, neva, pte_proto);

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