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pmap_bootstrap4_4c():

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* enable caching of message buffer & cpuinfo
	* it ought to be no longer necessary to not write-protect the kernel
	  text in order to support KGDB
This commit is contained in:
pk 2003-06-18 14:24:55 +00:00
parent db2a7d9a58
commit db543774bf
1 changed files with 9 additions and 8 deletions
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17
sys/arch/sparc/sparc/pmap.c
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@ -1,4 +1,4 @@
/* $NetBSD: pmap.c,v 1.254 2003/06/18 09:34:22 pk Exp $ */
/* $NetBSD: pmap.c,v 1.255 2003/06/18 14:24:55 pk Exp $ */
/*
* Copyright (c) 1996
@ -3337,18 +3337,19 @@ pmap_bootstrap4_4c(top, nctx, nregion, nsegment)
/*
* write protect & encache kernel text;
* set red zone at kernel base; enable cache on message buffer.
* set red zone at kernel base;
* enable cache on message buffer and cpuinfo.
*/
{
extern char etext[];
#ifdef KGDB
int mask = ~PG_NC; /* XXX chgkprot is busted */
#else
int mask = ~(PG_W | PG_NC);
#endif
/* Enable cache on message buffer and cpuinfo */
for (p = (caddr_t)KERNBASE; p < (caddr_t)trapbase; p += NBPG)
setpte4(p, getpte4(p) & ~PG_NC);
/* Enable cache and write protext kernel text */
for (p = (caddr_t)trapbase; p < etext; p += NBPG)
setpte4(p, getpte4(p) & mask);
setpte4(p, getpte4(p) & ~(PG_NC|PG_W));
/*
* Unmap the `etext gap'; it'll be made available