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authorMichal Simek <monstr@monstr.eu>2010-11-12 14:27:10 +0100
committerMichal Simek <monstr@monstr.eu>2011-01-03 10:16:56 +0100
commit17b931468729df6921981700bf18c75609c2f6af (patch)
tree0184e655f66fb84e0b558282116c710685598736 /arch/microblaze/kernel
parent27cbe8d4d1012847029dd8d7af1d6a41c22ddec6 (diff)
microblaze: Clear i/dcache for sw breakpoints
There is necessary to flush dcache and invalidate icache for address where breakpoint (brki r16, 0x18) was. The reason is that for some cases icache line still keeps brki instruction and it is not updated by origin instruction maintains by gdbserver. Signed-off-by: Michal Simek <monstr@monstr.eu>
Diffstat (limited to 'arch/microblaze/kernel')
-rw-r--r--arch/microblaze/kernel/exceptions.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/microblaze/kernel/exceptions.c b/arch/microblaze/kernel/exceptions.c
index 478f2943ede7..a7fa6ae76d89 100644
--- a/arch/microblaze/kernel/exceptions.c
+++ b/arch/microblaze/kernel/exceptions.c
@@ -25,6 +25,7 @@
#include <linux/errno.h>
#include <linux/ptrace.h>
#include <asm/current.h>
+#include <asm/cacheflush.h>
#define MICROBLAZE_ILL_OPCODE_EXCEPTION 0x02
#define MICROBLAZE_IBUS_EXCEPTION 0x03
@@ -52,6 +53,8 @@ void die(const char *str, struct pt_regs *fp, long err)
void sw_exception(struct pt_regs *regs)
{
_exception(SIGTRAP, regs, TRAP_BRKPT, regs->r16);
+ flush_dcache_range(regs->r16, regs->r16 + 0x4);
+ flush_icache_range(regs->r16, regs->r16 + 0x4);
}
void _exception(int signr, struct pt_regs *regs, int code, unsigned long addr)