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Correct handling of "physical address" values given to us by the

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VM code, which may have low bits specifying device space!
This commit is contained in:
gwr 1997-11-19 00:19:10 +00:00
parent 9bef2d1d82
commit 5ea276f19a
1 changed files with 29 additions and 5 deletions
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34
sys/arch/sun3/sun3/pmap.c
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@ -1,4 +1,4 @@
/* $NetBSD: pmap.c,v 1.86 1997/11/03 22:47:10 gwr Exp $ */
/* $NetBSD: pmap.c,v 1.87 1997/11/19 00:19:10 gwr Exp $ */
/*-
* Copyright (c) 1996 The NetBSD Foundation, Inc.
@ -155,6 +155,10 @@
#define MEM_BITS (PG_TYPE | PA_PGNUM(0xF0000000))
#define IS_MAIN_MEM(pte) (((pte) & MEM_BITS) == 0)
/* Does this (pseudo) PA represent device space? */
#define PA_IS_DEV(pa) (((pa) & (PMAP_OBIO | PMAP_VME16)) || \
(PA_PGNUM(pa) >= physmem))
/*
* Is there a Virtually Addressed Cache (VAC) alias problem
* if one page is mapped at both a1 and a2?
@ -462,7 +466,7 @@ pa_to_pvhead(vm_offset_t pa)
idx = PA_PGNUM(pa);
#ifdef DIAGNOSTIC
if (idx > physmem)
if ((pa & PGOFSET) || (idx >= physmem))
panic("pmap:pa_to_pvhead: bad pa=0x%lx", pa);
#endif
return (&pv_head_tbl[idx]);
@ -475,8 +479,8 @@ pa_to_pvflags(vm_offset_t pa)
idx = PA_PGNUM(pa);
#ifdef DIAGNOSTIC
if (idx > physmem)
panic("pmap:pa_to_pvflags: idx=0x%x", idx);
if ((pa & PGOFSET) || (idx >= physmem))
panic("pmap:pa_to_pvflags: bad pa=0x%lx", pa);
#endif
return (&pv_flags_tbl[idx]);
}
@ -2647,6 +2651,10 @@ pmap_clear_modify(pa)
if (!pv_initialized)
return;
/* The VM code may call this on device addresses! */
if (PA_IS_DEV(pa))
return;
pv_flags = pa_to_pvflags(pa);
head = pa_to_pvhead(pa);
@ -2670,6 +2678,10 @@ pmap_is_modified(pa)
if (!pv_initialized)
return (0);
/* The VM code may call this on device addresses! */
if (PA_IS_DEV(pa))
return (0);
pv_flags = pa_to_pvflags(pa);
head = pa_to_pvhead(pa);
@ -2697,6 +2709,10 @@ pmap_clear_reference(pa)
if (!pv_initialized)
return;
/* The VM code may call this on device addresses! */
if (PA_IS_DEV(pa))
return;
pv_flags = pa_to_pvflags(pa);
head = pa_to_pvhead(pa);
@ -2721,6 +2737,10 @@ pmap_is_referenced(pa)
if (!pv_initialized)
return (0);
/* The VM code may call this on device addresses! */
if (PA_IS_DEV(pa))
return (0);
pv_flags = pa_to_pvflags(pa);
head = pa_to_pvhead(pa);
@ -2890,6 +2910,10 @@ pmap_page_protect(pa, prot)
{
int s;
/* The VM code may call this on device addresses! */
if (PA_IS_DEV(pa))
return;
s = splpmap();
#ifdef PMAP_DEBUG
@ -3856,7 +3880,7 @@ pv_print(pa)
return;
}
idx = PA_PGNUM(pa);
if (idx > physmem) {
if (idx >= physmem) {
db_printf("bad address\n");
return;
}