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Modified the cpu_cache_purge_ID() calls in pagemove(), vmapbuf() and 

vunmapbuf(). If the address range involved is 4KB or less purge the
specific address ranges. otherwise purge the whole cache.
This commit is contained in:
mark 1997-07-31 00:08:04 +00:00
parent a158249541
commit 57a231e4b6
1 changed files with 13 additions and 5 deletions
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18
sys/arch/arm32/arm32/vm_machdep.c
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@ -1,4 +1,4 @@
/* $NetBSD: vm_machdep.c,v 1.13 1997/02/04 07:12:36 mark Exp $ */
/* $NetBSD: vm_machdep.c,v 1.14 1997/07/31 00:08:04 mark Exp $ */
/*
* Copyright (c) 1994-1997 Mark Brinicombe.
@ -418,7 +418,11 @@ pagemove(from, to, size)
* pages we are moving.
*/
cpu_cache_purgeID(); /* XXX can we limit the purge ? */
if (size <= 0x1000) {
cpu_cache_purgeID_rng((u_int)from, size);
cpu_cache_purgeID_rng((u_int)to, size);
} else
cpu_cache_purgeID();
while (size > 0) {
*tpte++ = *fpte;
@ -483,7 +487,11 @@ vmapbuf(bp, len)
* pages we are replacing
*/
cpu_cache_purgeID(); /* XXX Can we limit the purge ? */
if (len <= 0x1000) {
cpu_cache_purgeID_rng(faddr, len);
cpu_cache_purgeID_rng(taddr, len);
} else
cpu_cache_purgeID();
do {
*fpte = (*fpte) & ~(PT_C | PT_B);
@ -517,8 +525,6 @@ vunmapbuf(bp, len)
* pages we had mapped.
*/
cpu_cache_purgeID(); /* Can we limit the purge ? */
addr = trunc_page(bp->b_data);
off = (vm_offset_t)bp->b_data - addr;
len = round_page(off + len);
@ -526,6 +532,8 @@ vunmapbuf(bp, len)
bp->b_data = bp->b_saveaddr;
bp->b_saveaddr = 0;
cpu_cache_purgeID_rng(addr, len);
cpu_tlb_flushID();
}