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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>
This commit is contained in:
Igor Guryanov 2014-12-24 16:26:14 +03:00 committed by Alexey Brodkin
parent f8cf3d1ebd
commit e47d733867
2 changed files with 7 additions and 4 deletions
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1
arch/arc/cpu/arc700/interrupts.c
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@ -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);

10
arch/arc/cpu/arc700/start.S
View File

@ -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