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[src/trunk]: src/sys/arch/powerpc/booke Fool gcc into thinking we aren't usin...
details: https://anonhg.NetBSD.org/src/rev/6e7f8babd140
branches: trunk
changeset: 781466:6e7f8babd140
user: matt <matt%NetBSD.org@localhost>
date: Fri Sep 07 18:05:11 2012 +0000
description:
Fool gcc into thinking we aren't using r31. We do use it but we don't
clobber it since it save and restore it from a temporary register.
diffstat:
sys/arch/powerpc/booke/booke_pmap.c | 18 +++++++++++-------
1 files changed, 11 insertions(+), 7 deletions(-)
diffs (40 lines):
diff -r 440e538c2a69 -r 6e7f8babd140 sys/arch/powerpc/booke/booke_pmap.c
--- a/sys/arch/powerpc/booke/booke_pmap.c Fri Sep 07 17:11:43 2012 +0000
+++ b/sys/arch/powerpc/booke/booke_pmap.c Fri Sep 07 18:05:11 2012 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: booke_pmap.c,v 1.15 2012/07/09 17:45:22 matt Exp $ */
+/* $NetBSD: booke_pmap.c,v 1.16 2012/09/07 18:05:11 matt Exp $ */
/*-
* Copyright (c) 2010, 2011 The NetBSD Foundation, Inc.
* All rights reserved.
@@ -38,7 +38,7 @@
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: booke_pmap.c,v 1.15 2012/07/09 17:45:22 matt Exp $");
+__KERNEL_RCSID(0, "$NetBSD: booke_pmap.c,v 1.16 2012/09/07 18:05:11 matt Exp $");
#include <sys/param.h>
#include <sys/kcore.h>
@@ -364,12 +364,16 @@
for (u_int i = 0;
i < line_size;
src_va += 32, dst_va += 32, i += 32) {
- __asm(
- "lmw 24,0(%0)" "\n\t"
- "stmw 24,0(%1)"
- :: "b"(src_va), "b"(dst_va)
+ register_t tmp;
+ __asm __volatile(
+ "mr %[tmp],31" "\n\t"
+ "lmw 24,0(%[src])" "\n\t"
+ "stmw 24,0(%[dst])" "\n\t"
+ "mr 31,%[tmp]" "\n\t"
+ : [tmp] "=&r"(tmp)
+ : [src] "b"(src_va), [dst] "b"(dst_va)
: "r24", "r25", "r26", "r27",
- "r28", "r29", "r30", "r31");
+ "r28", "r29", "r30", "memory");
}
}
pmap_md_unmap_poolpage(src_va, NBPG);
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