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>
diff --git a/arch/microblaze/kernel/exceptions.c b/arch/microblaze/kernel/exceptions.c
index 478f294..a7fa6ae7 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 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)