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authorMichal Simek <monstr@monstr.eu>2010-06-22 15:25:24 +0200
committerMichal Simek <monstr@monstr.eu>2010-08-04 10:22:48 +0200
commit06b2864038517905752bdacd95f1f265ef780f3b (patch)
tree26f787945b246f594d8e25d89a3fb03ca5234430 /arch/microblaze
parent8b110d157c82f3818fc578b633f0cf7ace9efc22 (diff)
microblaze: Simplify _debug_exception function
Keep together all arguments for send_sig function. Move returning address to delay slot which is executed. Remove additional send_sig loading. I am using IMM part of rtbd instruction with r0. old solution: addik r11, r0, send_sig rtbd r11, 0 nop new solution: rtbd r0, send_sig nop There is one instruction saving. Signed-off-by: Michal Simek <monstr@monstr.eu>
Diffstat (limited to 'arch/microblaze')
-rw-r--r--arch/microblaze/kernel/entry.S7
1 files changed, 2 insertions, 5 deletions
diff --git a/arch/microblaze/kernel/entry.S b/arch/microblaze/kernel/entry.S
index 042657165184..04267ca949f0 100644
--- a/arch/microblaze/kernel/entry.S
+++ b/arch/microblaze/kernel/entry.S
@@ -895,15 +895,12 @@ C_ENTRY(_debug_exception):
swi r0, r1, PTO+PT_R0;
tovirt(r1,r1)
+ set_vms;
addi r5, r0, SIGTRAP /* send the trap signal */
add r6, r0, CURRENT_TASK; /* Get current task ptr into r11 */
addk r7, r0, r0 /* 3rd param zero */
-
- set_vms;
- addik r11, r0, send_sig;
+dbtrap_call: rtbd r0, send_sig;
addik r15, r0, dbtrap_call;
-dbtrap_call: rtbd r11, 0;
- nop;
set_bip; /* Ints masked for state restore*/
lwi r11, r1, PTO+PT_MODE;