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Since we keep a list of all mappings for a given physical page (even

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unmanaged mappings) so we can deal with cache aliases, make sure to
skip unmanaged/wired mappings (added via pmap_kenter_pa()) when doing
things like pmap_page_protect().
This commit is contained in:
scw 2002-10-31 14:34:17 +00:00
parent 6a3f09110b
commit 3795c4e6f4
1 changed files with 20 additions and 12 deletions
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32
sys/arch/sh5/sh5/pmap.c
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@ -1,4 +1,4 @@
/* $NetBSD: pmap.c,v 1.23 2002/10/24 13:56:45 scw Exp $ */
/* $NetBSD: pmap.c,v 1.24 2002/10/31 14:34:17 scw Exp $ */
/*
* Copyright 2002 Wasabi Systems, Inc.
@ -124,7 +124,7 @@
#include <machine/cacheops.h>
#define PMAP_DIAG
#undef PMAP_DIAG
#ifdef PMAP_DIAG
#ifndef DDB
#define pmap_debugger() panic("")
@ -572,7 +572,7 @@ static __inline void
pmap_pteg_synch(ptel_t ptel, struct pvo_entry *pvo)
{
if (PVO_ISMANAGED(pvo))
if (PVO_ISMANAGED(pvo) && !PVO_ISWIRED(pvo))
pvo->pvo_ptel |= (ptel & SH5_PTEL_RM_MASK);
}
@ -1715,15 +1715,11 @@ pmap_pvo_enter(pmap_t pm, struct pool *pl, struct pvo_head *pvo_head,
}
}
splx(s);
/*
* If we aren't overwriting a mapping, try to allocate
*/
pvo = pool_get(pl, poolflags);
s = splvm();
if (pvo == NULL) {
if ((flags & PMAP_CANFAIL) == 0)
panic("pmap_pvo_enter: failed");
@ -1913,7 +1909,7 @@ pmap_pvo_remove(struct pvo_entry *pvo, int idx)
* Save the REF/CHG bits into their cache if the page is managed.
*/
pg = PHYS_TO_VM_PAGE((paddr_t)(pvo->pvo_ptel & SH5_PTEL_PPN_MASK));
if (pg && PVO_ISMANAGED(pvo))
if (pg && PVO_ISMANAGED(pvo) && !PVO_ISWIRED(pvo))
pmap_attr_save(pg, pvo->pvo_ptel & (SH5_PTEL_R | SH5_PTEL_M));
/*
@ -2142,7 +2138,6 @@ pmap_enter(pmap_t pm, vaddr_t va, paddr_t pa, vm_prot_t prot, int flags)
if (pg && (flags & PMAP_UNMANAGED) == 0)
pmap_attr_save(pg, ptel & (SH5_PTEL_R | SH5_PTEL_M));
error = pmap_pvo_enter(pm, pl, pvo_head, va, pa, ptel, flags);
splx(s);
return (error);
@ -2343,6 +2338,8 @@ pmap_protect(pmap_t pm, vaddr_t va, vaddr_t endva, vm_prot_t prot)
PMPRINTF(("pmap_protect: protecting VA 0x%lx, PA 0x%lx\n",
va, (paddr_t)(pvo->pvo_ptel & SH5_PTEL_PPN_MASK)));
KDASSERT(!PVO_ISWIRED(pvo));
pvo->pvo_ptel &= ~clrbits;
pvo->pvo_vaddr &= ~PVO_WRITABLE;
@ -2446,6 +2443,16 @@ pmap_page_protect(struct vm_page *pg, vm_prot_t prot)
for (pvo = LIST_FIRST(pvo_head); pvo != NULL; pvo = next_pvo) {
next_pvo = LIST_NEXT(pvo, pvo_vlink);
/*
* Mappings entered using pmap_kenter_pa() can be ignored
*/
if (!PVO_ISMANAGED(pvo) || PVO_ISWIRED(pvo)) {
PMPRINTF((
"pmap_page_protect: ignoring wired VA 0x%lx\n",
PVO_VADDR(pvo)));
continue;
}
/*
* Downgrading to no mapping at all, we just remove the entry.
*/
@ -2548,7 +2555,8 @@ pmap_query_bit(struct vm_page *pg, ptel_t ptebit)
* See if we saved the bit off. If so cache, it and return
* success.
*/
if (PVO_ISMANAGED(pvo) && pvo->pvo_ptel & ptebit) {
if (PVO_ISMANAGED(pvo) && !PVO_ISWIRED(pvo) &&
pvo->pvo_ptel & ptebit) {
pmap_attr_save(pg, ptebit);
PMPRINTF(("yes. Cached in pvo for 0x%lx.\n",
PVO_VADDR(pvo)));
@ -2563,7 +2571,7 @@ pmap_query_bit(struct vm_page *pg, ptel_t ptebit)
* to the PTEs.
*/
LIST_FOREACH(pvo, vm_page_to_pvoh(pg), pvo_vlink) {
if (!PVO_ISMANAGED(pvo))
if (!PVO_ISMANAGED(pvo) || PVO_ISWIRED(pvo))
continue;
if (PVO_VADDR(pvo) < SH5_KSEG0_BASE) {
@ -2637,7 +2645,7 @@ pmap_clear_bit(struct vm_page *pg, ptel_t ptebit)
* valid PTE. If so, clear the ptebit from the valid PTE.
*/
LIST_FOREACH(pvo, vm_page_to_pvoh(pg), pvo_vlink) {
if (!PVO_ISMANAGED(pvo))
if (!PVO_ISMANAGED(pvo) || PVO_ISWIRED(pvo))
continue;
if (PVO_VADDR(pvo) < SH5_KSEG0_BASE) {