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MIPS part of fix for PR 6152, sligtly changed from M.Hitch's version

This commit is contained in:
is 1999-02-26 19:03:39 +00:00
parent b10dbdb37a
commit 5e073f4807
2 changed files with 48 additions and 3 deletions
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5
sys/arch/mips/include/pmap.h
View File

@ -1,4 +1,4 @@
/* $NetBSD: pmap.h,v 1.24 1999/01/18 02:11:07 castor Exp $ */
/* $NetBSD: pmap.h,v 1.25 1999/02/26 19:03:39 is Exp $ */
/*
* Copyright (c) 1987 Carnegie-Mellon University
@ -123,6 +123,9 @@ void pmap_bootstrap __P((void));
void pmap_set_modified __P((paddr_t));
void pmap_procwr __P((struct proc *, vaddr_t, size_t));
#define PMAP_NEED_PROCWR
/*
* pmap_prefer() helps reduce virtual-coherency exceptions in
* the virtually-indexed cache on mips3 CPUs.

46
sys/arch/mips/mips/pmap.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: pmap.c,v 1.50 1999/01/16 08:51:04 nisimura Exp $ */
/* $NetBSD: pmap.c,v 1.51 1999/02/26 19:03:40 is Exp $ */
/*-
* Copyright (c) 1998 The NetBSD Foundation, Inc.
@ -78,7 +78,7 @@
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.50 1999/01/16 08:51:04 nisimura Exp $");
__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.51 1999/02/26 19:03:40 is Exp $");
/*
* Manages physical address maps.
@ -1013,6 +1013,48 @@ pmap_protect(pmap, sva, eva, prot)
}
}
void
pmap_procwr(p, va, len)
struct proc *p;
vaddr_t va;
size_t len;
{
pmap_t pmap;
pmap = p->p_vmspace->vm_map.pmap;
if (CPUISMIPS3) {
#if 0
printf("pmap_procwr: va %lx len %lx\n", va, len);
#endif
mips3_FlushDCache(va, len);
mips3_FlushICache(MIPS_PHYS_TO_KSEG0(va &
(mips_L1ICacheSize - 1)), len);
} else {
pt_entry_t *pte;
unsigned entry;
#if 0
printf("pmap_procwr: va %lx", va);
#endif
if (!(pte = pmap_segmap(pmap, va)))
return;
pte += (va >> PGSHIFT) & (NPTEPG - 1);
entry = pte->pt_entry;
if (!mips_pg_v(entry))
return;
#if 0
printf(" flush %lx", pfn_to_vad(entry) + (va & PGOFSET));
#endif
mips1_FlushICache(MIPS_PHYS_TO_KSEG0(mips1_pfn_to_vad(entry)
+ (va & PGOFSET)),
len);
#if 0
printf("\n");
#endif
}
}
/*
* Return RO protection of page.
*/