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pmap_unwire(): Use pmap_map_ptes() correctly.

This commit is contained in:
thorpej 2002-03-24 05:28:46 +00:00
parent 11df08a743
commit 0aef2cab11
1 changed files with 28 additions and 22 deletions
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50
sys/arch/arm/arm32/pmap.c
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@ -1,4 +1,4 @@
/* $NetBSD: pmap.c,v 1.59 2002/03/24 05:15:59 thorpej Exp $ */
/* $NetBSD: pmap.c,v 1.60 2002/03/24 05:28:46 thorpej Exp $ */
/*
* Copyright (c) 2002 Wasabi Systems, Inc.
@ -143,7 +143,7 @@
#include <machine/param.h>
#include <arm/arm32/katelib.h>
__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.59 2002/03/24 05:15:59 thorpej Exp $");
__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.60 2002/03/24 05:28:46 thorpej Exp $");
#ifdef PMAP_DEBUG
#define PDEBUG(_lev_,_stat_) \
if (pmap_debug_level >= (_lev_)) \
@ -2894,31 +2894,37 @@ pmap_unwire(pmap, va)
struct pmap *pmap;
vaddr_t va;
{
pt_entry_t *pte;
paddr_t pa;
pt_entry_t *ptes;
struct vm_page *pg;
paddr_t pa;
/*
* Make sure pmap is valid. -dct
*/
if (pmap == NULL)
return;
PMAP_MAP_TO_HEAD_LOCK();
ptes = pmap_map_ptes(pmap); /* locks pmap */
/* Get the pte */
pte = pmap_pte(pmap, va);
if (!pte)
return;
if (pmap_pde_v(pmap_pde(pmap, va))) {
#ifdef DIAGNOSTIC
if (l2pte_valid(ptes[arm_btop(va)]) == 0)
panic("pmap_unwire: invalid L2 PTE");
#endif
/* Extract the physical address of the page */
pa = l2pte_pa(ptes[arm_btop(va)]);
/* Extract the physical address of the page */
pa = pmap_pte_pa(pte);
if ((pg = PHYS_TO_VM_PAGE(pa)) == NULL)
goto out;
if ((pg = PHYS_TO_VM_PAGE(pa)) == NULL)
return;
simple_lock(&pg->mdpage.pvh_slock);
/* Update the wired bit in the pv entry for this page. */
(void) pmap_modify_pv(pmap, va, pg, PT_W, 0);
simple_unlock(&pg->mdpage.pvh_slock);
/* Update the wired bit in the pv entry for this page. */
simple_lock(&pg->mdpage.pvh_slock);
(void) pmap_modify_pv(pmap, va, pg, PT_W, 0);
simple_unlock(&pg->mdpage.pvh_slock);
}
#ifdef DIAGNOSTIC
else {
panic("pmap_unwire: invalid L1 PTE");
}
#endif
out:
pmap_unmap_ptes(pmap); /* unlocks pmap */
PMAP_MAP_TO_HEAD_UNLOCK();
}
/*