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| author | Michal Simek <monstr@monstr.eu> | 2010-06-22 15:25:24 +0200 |
|---|---|---|
| committer | Michal Simek <monstr@monstr.eu> | 2010-08-04 10:22:48 +0200 |
| commit | 06b2864038517905752bdacd95f1f265ef780f3b (patch) | |
| tree | 26f787945b246f594d8e25d89a3fb03ca5234430 /arch/microblaze/kernel | |
| parent | 8b110d157c82f3818fc578b633f0cf7ace9efc22 (diff) | |
| download | talos-obmc-linux-06b2864038517905752bdacd95f1f265ef780f3b.tar.gz talos-obmc-linux-06b2864038517905752bdacd95f1f265ef780f3b.zip | |
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/kernel')
| -rw-r--r-- | arch/microblaze/kernel/entry.S | 7 |
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; |
