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Clone vmapbuf() and vunmapbuf() from the Alpha port.

This commit is contained in:
thorpej 1999-05-28 22:59:40 +00:00
parent fb36fe649a
commit dbc1dd921a
1 changed files with 17 additions and 24 deletions
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41
sys/arch/mips/mips/vm_machdep.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: vm_machdep.c,v 1.40 1999/05/27 01:56:34 nisimura Exp $ */
/* $NetBSD: vm_machdep.c,v 1.41 1999/05/28 22:59:40 thorpej Exp $ */
/*
* Copyright (c) 1988 University of Utah.
@ -43,7 +43,7 @@
*/
#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
__KERNEL_RCSID(0, "$NetBSD: vm_machdep.c,v 1.40 1999/05/27 01:56:34 nisimura Exp $");
__KERNEL_RCSID(0, "$NetBSD: vm_machdep.c,v 1.41 1999/05/28 22:59:40 thorpej Exp $");
#include <sys/param.h>
#include <sys/systm.h>
@ -308,34 +308,28 @@ vmapbuf(bp, len)
struct buf *bp;
vsize_t len;
{
vaddr_t faddr, taddr;
vsize_t off;
pt_entry_t *fpte, *tpte;
pt_entry_t *pmap_pte __P((pmap_t, vaddr_t));
u_int pt_mask;
vaddr_t faddr, taddr, off;
paddr_t pa;
struct proc *p;
if ((bp->b_flags & B_PHYS) == 0)
panic("vmapbuf");
p = bp->b_proc;
faddr = trunc_page(bp->b_saveaddr = bp->b_data);
off = (vaddr_t)bp->b_data - faddr;
len = round_page(off + len);
taddr = uvm_km_valloc_wait(phys_map, len);
bp->b_data = (caddr_t)(taddr + off);
/*
* The region is locked, so we expect that pmap_pte() will return
* non-NULL.
*/
fpte = pmap_pte(vm_map_pmap(&bp->b_proc->p_vmspace->vm_map), faddr);
tpte = pmap_pte(vm_map_pmap(phys_map), taddr);
pt_mask = (CPUISMIPS3) ? (MIPS3_PG_V|MIPS3_PG_G|MIPS3_PG_D) :
(MIPS1_PG_V|MIPS1_PG_G|MIPS1_PG_D);
do {
/* XXX should mark them PG_WIRED? */
tpte->pt_entry = fpte->pt_entry | pt_mask;
MachTLBUpdate(taddr, tpte->pt_entry);
tpte++, fpte++, taddr += PAGE_SIZE;
len -= PAGE_SIZE;
} while (len);
len = atop(len);
while (len--) {
pa = pmap_extract(vm_map_pmap(&p->p_vmspace->vm_map), faddr);
if (pa == 0)
panic("vmapbuf: null page frame");
pmap_enter(vm_map_pmap(phys_map), taddr, trunc_page(pa),
VM_PROT_READ|VM_PROT_WRITE, TRUE, 0);
faddr += PAGE_SIZE;
taddr += PAGE_SIZE;
}
}
/*
@ -346,8 +340,7 @@ vunmapbuf(bp, len)
struct buf *bp;
vsize_t len;
{
vaddr_t addr;
vsize_t off;
vaddr_t addr, off;
if ((bp->b_flags & B_PHYS) == 0)
panic("vunmapbuf");