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authorIgor Guryanov <guryanov@synopsys.com>2014-12-24 16:26:14 +0300
committerAlexey Brodkin <abrodkin@synopsys.com>2015-01-15 22:38:42 +0300
commite47d733867b2da336754718f7eaa7f51655dbefa (patch)
tree2768c99fce5aed73730d697774732e80c51154d9 /arch
parentf8cf3d1ebdf7622f65c4eeba9eae1ed04982de12 (diff)
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arc: add ECR (exception cause register) output
Exception cause register (ECR) contains value that describes a reason for exception that has happened. This helps a lot to figure-out what went wrong. Now we print this register contents when dumping registers. Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com> Signed-off-by: Igor Guryanov <guryanov@synopsys.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/arc/cpu/arc700/interrupts.c1
-rw-r--r--arch/arc/cpu/arc700/start.S10
2 files changed, 7 insertions, 4 deletions
diff --git a/arch/arc/cpu/arc700/interrupts.c b/arch/arc/cpu/arc700/interrupts.c
index d93a6eb..7dde74b 100644
--- a/arch/arc/cpu/arc700/interrupts.c
+++ b/arch/arc/cpu/arc700/interrupts.c
@@ -61,6 +61,7 @@ static void print_reg_file(long *reg_rev, int start_num)
void show_regs(struct pt_regs *regs)
{
+ printf("ECR:\t0x%08lx\n", regs->ecr);
printf("RET:\t0x%08lx\nBLINK:\t0x%08lx\nSTAT32:\t0x%08lx\n",
regs->ret, regs->blink, regs->status32);
printf("GP: 0x%08lx\t r25: 0x%08lx\t\n", regs->r26, regs->r25);
diff --git a/arch/arc/cpu/arc700/start.S b/arch/arc/cpu/arc700/start.S
index 563513b..4d505bf 100644
--- a/arch/arc/cpu/arc700/start.S
+++ b/arch/arc/cpu/arc700/start.S
@@ -57,11 +57,13 @@
.endm
.macro SAVE_ALL_SYS
-
+ /* saving %r0 to reg->r0 in advance since we read %ecr into it */
+ st %r0, [%sp, -8]
+ lr %r0, [%ecr] /* all stack addressing is manual so far */
st %r0, [%sp]
- lr %r0, [%ecr]
- st %r0, [%sp, 8] /* ECR */
- st %sp, [%sp, 4]
+ st %sp, [%sp, -4]
+ /* now move %sp to reg->r0 position so we can do "push" automatically */
+ sub %sp, %sp, 8
SAVE_R1_TO_R24
PUSH %r25