diff options
| author | Michal Simek <monstr@monstr.eu> | 2010-03-19 12:50:35 +0100 |
|---|---|---|
| committer | Michal Simek <monstr@monstr.eu> | 2010-04-01 08:38:23 +0200 |
| commit | bd1637d63e82aaf732ffbe907ba887fa12e82df4 (patch) | |
| tree | e81024ed210d7c604a20ce6b32f6c72701a2dc73 /arch/microblaze/kernel | |
| parent | microblaze: Change register usage for ESR and EAR (diff) | |
| download | linux-bd1637d63e82aaf732ffbe907ba887fa12e82df4.tar.xz linux-bd1637d63e82aaf732ffbe907ba887fa12e82df4.zip | |
microblaze: Remove additional resr and rear loading
RESR and REAR uses the same regs in whole file.
Signed-off-by: Michal Simek <monstr@monstr.eu>
Diffstat (limited to 'arch/microblaze/kernel')
| -rw-r--r-- | arch/microblaze/kernel/hw_exception_handler.S | 18 |
1 files changed, 3 insertions, 15 deletions
diff --git a/arch/microblaze/kernel/hw_exception_handler.S b/arch/microblaze/kernel/hw_exception_handler.S index a652addb9321..5d8c3de58b0c 100644 --- a/arch/microblaze/kernel/hw_exception_handler.S +++ b/arch/microblaze/kernel/hw_exception_handler.S @@ -562,20 +562,16 @@ ex_handler_done: */ mfs r11, rpid nop - mfs r3, rear /* Get faulting address */ - nop /* If we are faulting a kernel address, we have to use the * kernel page tables. */ - ori r4, r0, CONFIG_KERNEL_START - cmpu r4, r3, r4 - bgti r4, ex3 + ori r5, r0, CONFIG_KERNEL_START + cmpu r5, r3, r5 + bgti r5, ex3 /* First, check if it was a zone fault (which means a user * tried to access a kernel or read-protected page - always * a SEGV). All other faults here must be stores, so no * need to check ESR_S as well. */ - mfs r4, resr - nop andi r4, r4, 0x800 /* ESR_Z - zone protection */ bnei r4, ex2 @@ -590,8 +586,6 @@ ex_handler_done: * tried to access a kernel or read-protected page - always * a SEGV). All other faults here must be stores, so no * need to check ESR_S as well. */ - mfs r4, resr - nop andi r4, r4, 0x800 /* ESR_Z */ bnei r4, ex2 /* get current task address */ @@ -666,8 +660,6 @@ ex_handler_done: * R3 = ESR */ - mfs r3, rear /* Get faulting address */ - nop RESTORE_STATE; bri page_fault_instr_trap @@ -682,8 +674,6 @@ ex_handler_done: */ mfs r11, rpid nop - mfs r3, rear /* Get faulting address */ - nop /* If we are faulting a kernel address, we have to use the * kernel page tables. */ @@ -754,8 +744,6 @@ ex_handler_done: */ mfs r11, rpid nop - mfs r3, rear /* Get faulting address */ - nop /* If we are faulting a kernel address, we have to use the * kernel page tables. |