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At the end of pmap_zero/copy_page() use hit instead of index op when

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running with multi-way caches.  Since we know the ops will mostly
hit as we just dirtied those lines a single hit op is cheaper than
an index op for each way.
This commit is contained in:
jeffs 2000-10-31 23:16:31 +00:00
parent 5ca84b9d89
commit 50e0133709
1 changed files with 10 additions and 8 deletions
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18
sys/arch/mips/mips/pmap.c
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@ -1,4 +1,4 @@
/* $NetBSD: pmap.c,v 1.111 2000/10/31 22:46:36 jeffs Exp $ */
/* $NetBSD: pmap.c,v 1.112 2000/10/31 23:16:31 jeffs Exp $ */
/*-
* Copyright (c) 1998 The NetBSD Foundation, Inc.
@ -78,7 +78,7 @@
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.111 2000/10/31 22:46:36 jeffs Exp $");
__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.112 2000/10/31 23:16:31 jeffs Exp $");
/*
* Manages physical address maps.
@ -1592,9 +1592,10 @@ pmap_zero_page(phys)
* might read old stale DRAM footprint, not the just-written data.
*/
if (CPUISMIPS3 && !mips_L2CachePresent) {
/*XXX FIXME Not very sophisticated */
/* MachFlushCache();*/
MachFlushDCache(MIPS_PHYS_TO_KSEG0(phys), NBPG);
if (mips3_L1TwoWayCache)
MachHitFlushDCache(MIPS_PHYS_TO_KSEG0(phys), NBPG);
else
MachFlushDCache(phys, NBPG);
}
#endif
}
@ -1744,9 +1745,10 @@ pmap_copy_page(src, dst)
* the destination as well?
*/
if (CPUISMIPS3) {
/*XXX FIXME Not very sophisticated */
/* MachFlushCache();*/
MachFlushDCache(dst, NBPG);
if (mips3_L1TwoWayCache)
MachHitFlushDCache(MIPS_PHYS_TO_KSEG0(dst), NBPG);
else
MachFlushDCache(dst, NBPG);
}
#endif
}