Aren
/
NetBSD
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Switch vmap*buf back to using pmap_enter/pmap_remove. This is so that 

accesses to the buffer will cause the reference and modified bits for
the pages to be udpated appropriately.
This commit is contained in:
matt 2002-08-10 16:28:49 +00:00
parent a4e64b08d4
commit 246ee3ef1d
1 changed files with 12 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
sys/arch/powerpc/powerpc/vm_machdep.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: vm_machdep.c,v 1.40 2002/07/28 07:07:46 chs Exp $ */ /* $NetBSD: vm_machdep.c,v 1.41 2002/08/10 16:28:49 matt Exp $ */
/* /*
* Copyright (C) 1995, 1996 Wolfgang Solfrank. * Copyright (C) 1995, 1996 Wolfgang Solfrank.
@ -366,7 +366,12 @@ vmapbuf(bp, len)
for (; len > 0; len -= NBPG) { for (; len > 0; len -= NBPG) {
(void) pmap_extract(vm_map_pmap(&bp->b_proc->p_vmspace->vm_map), (void) pmap_extract(vm_map_pmap(&bp->b_proc->p_vmspace->vm_map),
faddr, &pa); faddr, &pa);
pmap_kenter_pa(taddr, pa, VM_PROT_READ|VM_PROT_WRITE); /*
* Use pmap_enter so the referenced and modified bits are
* appropriately set.
*/
pmap_enter(pmap_kernel(), taddr, pa,
VM_PROT_READ|VM_PROT_WRITE, VM_PROT_READ|VM_PROT_WRITE);
faddr += NBPG; faddr += NBPG;
taddr += NBPG; taddr += NBPG;
} }
@ -391,7 +396,11 @@ vunmapbuf(bp, len)
addr = trunc_page((vaddr_t)bp->b_data); addr = trunc_page((vaddr_t)bp->b_data);
off = (vaddr_t)bp->b_data - addr; off = (vaddr_t)bp->b_data - addr;
len = round_page(off + len); len = round_page(off + len);
pmap_kremove(addr, len); /*
* Since the pages were entered by pmap_enter, use pmap_remove
* to remove them.
*/
pmap_remove(pmap_kernel(), addr, addr + len);
pmap_update(pmap_kernel()); pmap_update(pmap_kernel());
uvm_km_free_wakeup(phys_map, addr, len); uvm_km_free_wakeup(phys_map, addr, len);
bp->b_data = bp->b_saveaddr; bp->b_data = bp->b_saveaddr;