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* Performance improvements from July 1997:

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Avoid unecessary cache writebacks on mips3. 10% win on kernel builds.
* _KERNEL_RCSID.
This commit is contained in:
jonathan 1997-10-17 05:57:20 +00:00
parent 065400a1f3
commit 84d8ac7355
1 changed files with 21 additions and 5 deletions
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26
sys/arch/mips/mips/pmap.c
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@ -1,4 +1,4 @@
/* $NetBSD: pmap.c,v 1.31 1997/08/09 03:41:08 jonathan Exp $ */
/* $NetBSD: pmap.c,v 1.32 1997/10/17 05:57:20 jonathan Exp $ */
/*
* Copyright (c) 1992, 1993
@ -39,6 +39,10 @@
* @(#)pmap.c 8.4 (Berkeley) 1/26/94
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.32 1997/10/17 05:57:20 jonathan Exp $");
/*
* Manages physical address maps.
*
@ -1278,7 +1282,12 @@ pmap_zero_page(phys)
if (pmapdebug & PDB_FOLLOW)
printf("pmap_zero_page(%lx)\n", phys);
#endif
#ifdef MIPS3
#if defined(DIAGNOSTIC) || defined(DEBUG)
if (! (phys < MIPS_MAX_MEM_ADDR))
printf("pmap_zero_page(%lx) nonphys\n", phys);
#endif
#if defined(MIPS3) && defined(MIPS3_FLUSH)
if (CPUISMIPS3) {
/*XXX FIXME Not very sophisticated */
/* MachFlushCache();*/
@ -1310,7 +1319,7 @@ pmap_zero_page(phys)
p[15] = 0;
p += 16;
} while (p != end);
#ifdef MIPS3
#if defined(MIPS3) && defined(MIPS3_FLUSH)
/*
* If we have a virtually-indexed, physically-tagged WB cache,
* and no L2 cache to warn of aliased mappings, we must force a
@ -1344,7 +1353,14 @@ pmap_copy_page(src, dst)
if (pmapdebug & PDB_FOLLOW)
printf("pmap_copy_page(%lx, %lx)\n", src, dst);
#endif
#ifdef MIPS3
#if defined(DIAGNOSTIC) || defined(DEBUG)
if (! (src < MIPS_MAX_MEM_ADDR))
printf("pmap_copy_page(%lx) src nonphys\n", src);
if (! (dst < MIPS_MAX_MEM_ADDR))
printf("pmap_copy_page(%lx) dst nonphys\n", dst);
#endif
#if defined(MIPS3) && defined(MIPS3_FLUSH)
/*
* If we have a virtually-indexed, physically-tagged cache,
* and no L2 cache to warn of aliased mappings, we must force an
@ -1404,7 +1420,7 @@ pmap_copy_page(src, dst)
s += 16;
d += 16;
} while (s != end);
#ifdef MIPS3
#if defined(MIPS3) && defined(MIPS3_FLUSH)
/*
* If we have a virtually-indexed, physically-tagged WB cache,
* and no L2 cache to warn of aliased mappings, we must force a