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add back some cache flushes that are actually necessary. 

any time we remove all access to a given virtual page,
we must invalidate the (write-through) L1 dcache.
pmap_remove() still had it, but pmap_kremove(), pmap_clear_reference()
and pmap_page_protect(VM_PROT_NONE) didn't and needed it.
fixes PR 18040.
This commit is contained in:
chs 2002-09-03 05:08:21 +00:00
parent bd93d53f7c
commit 5a29cadda3
1 changed files with 6 additions and 1 deletions
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7
sys/arch/sparc64/sparc64/pmap.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: pmap.c,v 1.125 2002/08/12 12:04:31 mrg Exp $ */
/* $NetBSD: pmap.c,v 1.126 2002/09/03 05:08:21 chs Exp $ */
#undef NO_VCACHE /* Don't forget the locked TLB in dostart */
#define HWREF
/*
@ -2006,6 +2006,8 @@ pmap_kremove(va, size)
{
struct pmap *pm = pmap_kernel();
int64_t data;
vaddr_t flushva = va;
vsize_t flushsize = size;
int i, s, flush = 0;
ASSERT(va < INTSTACK || va > EINTSTACK);
@ -2084,6 +2086,7 @@ pmap_kremove(va, size)
#ifdef DEBUG
remove_stats.flushes ++;
#endif
cache_flush_virt(flushva, flushsize);
}
simple_unlock(&pm->pm_lock);
splx(s);
@ -2906,6 +2909,7 @@ pmap_clear_reference(pg)
}
}
splx(s);
dcache_flush_page(pa);
pv_check();
#ifdef DEBUG
if (pmap_is_referenced(pg)) {
@ -3271,6 +3275,7 @@ pmap_page_protect(pg, prot)
}
}
splx(s);
dcache_flush_page(pa);
}
/* We should really only flush the pages we demapped. */
pv_check();