From: Michal Simek <michal.simek@xilinx.com>
Date: Mon, 26 Jan 2015 13:32:23 +0000 (+0100)
Subject: microblaze: Show return address from exception
X-Git-Tag: KARO-TX6-2015-09-18~3869
X-Git-Url: https://git.kernelconcepts.de/?p=karo-tx-uboot.git;a=commitdiff_plain;h=672685d57478ab19d77c54136edaf275cd24a481

microblaze: Show return address from exception

Show also return address from exception which should
suggest where the problem is.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
---

diff --git a/arch/microblaze/cpu/exception.c b/arch/microblaze/cpu/exception.c
index 227842f6a4..45729331f3 100644
--- a/arch/microblaze/cpu/exception.c
+++ b/arch/microblaze/cpu/exception.c
@@ -18,6 +18,8 @@ void _hw_exception_handler (void)
 	/* loading excetpion state register ESR */
 	MFS (state, resr);
 	printf ("Hardware exception at 0x%x address\n", address);
+	R17(address);
+	printf("Return address from exception 0x%x\n", address);
 	switch (state & 0x1f) {	/* mask on exception cause */
 	case 0x1:
 		puts ("Unaligned data access exception\n");
diff --git a/arch/microblaze/include/asm/asm.h b/arch/microblaze/include/asm/asm.h
index c1c3b03985..11f3dd0f0e 100644
--- a/arch/microblaze/include/asm/asm.h
+++ b/arch/microblaze/include/asm/asm.h
@@ -43,6 +43,10 @@
 #define R14(val) \
 	__asm__ __volatile__ ("addi %0, r14, 0":"=r" (val));
 
+/* get return address from interrupt */
+#define R17(val) \
+	__asm__ __volatile__ ("addi %0, r17, 0" : "=r" (val));
+
 #define NOP	__asm__ __volatile__ ("nop");
 
 /* use machine status registe USE_MSR_REG */