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On MPC601s, rewrite any (unimplemented) tlbsync instruction as a sync.

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This commit is contained in:
kleink 2004-06-23 22:04:44 +00:00
parent 6bed93d4a6
commit 0edffeb867
1 changed files with 22 additions and 2 deletions
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24
sys/arch/powerpc/oea/oea_machdep.c
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@ -1,4 +1,4 @@
/* $NetBSD: oea_machdep.c,v 1.17 2004/06/09 23:24:51 kleink Exp $ */
/* $NetBSD: oea_machdep.c,v 1.18 2004/06/23 22:04:44 kleink Exp $ */
/*
* Copyright (C) 2002 Matt Thomas
@ -33,7 +33,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: oea_machdep.c,v 1.17 2004/06/09 23:24:51 kleink Exp $");
__KERNEL_RCSID(0, "$NetBSD: oea_machdep.c,v 1.18 2004/06/23 22:04:44 kleink Exp $");
#include "opt_compat_netbsd.h"
#include "opt_ddb.h"
@ -260,6 +260,8 @@ oea_init(void (*handler)(void))
#define MTSPR_IBAT1L 0x7c1383a6
#define NOP 0x60000000
#define B 0x48000000
#define TLBSYNC 0x7c00046c
#define SYNC 0x7c0004ac
#ifdef ALTIVEC
#define MFSPR_VRSAVE 0x7c0042a6
@ -326,6 +328,24 @@ oea_init(void (*handler)(void))
__syncicache((void *) trapstart,
(uintptr_t) trapend - (uintptr_t) trapstart);
/*
* If we are on a MPC601 processor, we need to zap any tlbsync
* instructions into sync. This differs from the above in
* examing all kernel text, as opposed to just the exception handling.
* We sync the icache on every instruction found since there are
* only very few of them.
*/
if (cpuvers == MPC601) {
extern int kernel_text[], etext[];
int *ip;
for (ip = kernel_text; ip < etext; ip++)
if (*ip == TLBSYNC) {
*ip = SYNC;
__syncicache(ip, sizeof(*ip));
}
}
/*
* external interrupt handler install
*/