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authorDavid Howells <dhowells@redhat.com>2010-10-27 17:28:46 +0100
committerDavid Howells <dhowells@redhat.com>2010-10-27 17:28:46 +0100
commitb478491f2628114b2eae76587f22ce3789b66012 (patch)
tree038580a05fa1a3c8c9cbee0fa8743af2bba650b9 /arch/mn10300/kernel
parent9731d23710736b96786d68c2e63148ff3f22e6eb (diff)
downloadblackbird-op-linux-b478491f2628114b2eae76587f22ce3789b66012.tar.gz
blackbird-op-linux-b478491f2628114b2eae76587f22ce3789b66012.zip
MN10300: Allow some cacheflushes to be avoided if cache snooping is available
The AM34 core is able to do cache snooping, and so can skip some of the cache flushing. Signed-off-by: David Howells <dhowells@redhat.com>
Diffstat (limited to 'arch/mn10300/kernel')
-rw-r--r--arch/mn10300/kernel/kprobes.c4
-rw-r--r--arch/mn10300/kernel/traps.c2
2 files changed, 6 insertions, 0 deletions
diff --git a/arch/mn10300/kernel/kprobes.c b/arch/mn10300/kernel/kprobes.c
index 67e6389d625a..0311a7fcea16 100644
--- a/arch/mn10300/kernel/kprobes.c
+++ b/arch/mn10300/kernel/kprobes.c
@@ -377,8 +377,10 @@ void __kprobes arch_arm_kprobe(struct kprobe *p)
void __kprobes arch_disarm_kprobe(struct kprobe *p)
{
+#ifndef CONFIG_MN10300_CACHE_SNOOP
mn10300_dcache_flush();
mn10300_icache_inv();
+#endif
}
void arch_remove_kprobe(struct kprobe *p)
@@ -390,8 +392,10 @@ void __kprobes disarm_kprobe(struct kprobe *p, struct pt_regs *regs)
{
*p->addr = p->opcode;
regs->pc = (unsigned long) p->addr;
+#ifndef CONFIG_MN10300_CACHE_SNOOP
mn10300_dcache_flush();
mn10300_icache_inv();
+#endif
}
static inline
diff --git a/arch/mn10300/kernel/traps.c b/arch/mn10300/kernel/traps.c
index a64604b512d5..c7257a1304a9 100644
--- a/arch/mn10300/kernel/traps.c
+++ b/arch/mn10300/kernel/traps.c
@@ -533,8 +533,10 @@ void __init set_intr_stub(enum exception_code code, void *handler)
vector[6] = 0xcb;
vector[7] = 0xcb;
+#ifndef CONFIG_MN10300_CACHE_SNOOP
mn10300_dcache_flush_inv();
mn10300_icache_inv();
+#endif
}
/*
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