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| author | Michal Simek <monstr@monstr.eu> | 2010-08-09 14:37:42 +0200 |
|---|---|---|
| committer | Michal Simek <monstr@monstr.eu> | 2010-10-21 07:51:33 +0200 |
| commit | 600eb6110a3f15aedffc3cce31b6065a09e7cb31 (patch) | |
| tree | f4e6df83bf2ae1284d1d5aac9882c826f839493a /arch/microblaze | |
| parent | microblaze: Removing dead CONTIGUOUS_PAGE_ALLOC config option (diff) | |
| download | linux-600eb6110a3f15aedffc3cce31b6065a09e7cb31.tar.xz linux-600eb6110a3f15aedffc3cce31b6065a09e7cb31.zip | |
microblaze: Fix r16 and r17 reg saving
r16 and r17 should be saved across interrupt and exception handling.
Signed-off-by: Michal Simek <monstr@monstr.eu>
Diffstat (limited to 'arch/microblaze')
| -rw-r--r-- | arch/microblaze/kernel/entry.S | 11 |
1 files changed, 4 insertions, 7 deletions
diff --git a/arch/microblaze/kernel/entry.S b/arch/microblaze/kernel/entry.S index 8539c6c0e741..819238b8a429 100644 --- a/arch/microblaze/kernel/entry.S +++ b/arch/microblaze/kernel/entry.S @@ -186,6 +186,8 @@ swi r13, r1, PTO+PT_R13; /* Save SDA2 */ \ swi r14, r1, PTO+PT_PC; /* PC, before IRQ/trap */ \ swi r15, r1, PTO+PT_R15; /* Save LP */ \ + swi r16, r1, PTO+PT_R16; \ + swi r17, r1, PTO+PT_R17; \ swi r18, r1, PTO+PT_R18; /* Save asm scratch reg */ \ swi r19, r1, PTO+PT_R19; \ swi r20, r1, PTO+PT_R20; \ @@ -220,6 +222,8 @@ lwi r13, r1, PTO+PT_R13; /* restore SDA2 */ \ lwi r14, r1, PTO+PT_PC; /* RESTORE_LINK PC, before IRQ/trap */\ lwi r15, r1, PTO+PT_R15; /* restore LP */ \ + lwi r16, r1, PTO+PT_R16; \ + lwi r17, r1, PTO+PT_R17; \ lwi r18, r1, PTO+PT_R18; /* restore asm scratch reg */ \ lwi r19, r1, PTO+PT_R19; \ lwi r20, r1, PTO+PT_R20; \ @@ -761,9 +765,7 @@ C_ENTRY(_debug_exception): /* save all regs to pt_reg structure */ swi r0, r1, PTO+PT_R0; /* R0 must be saved too */ swi r14, r1, PTO+PT_R14 /* rewrite saved R14 value */ - swi r16, r1, PTO+PT_R16 swi r16, r1, PTO+PT_PC; /* PC and r16 are the same */ - swi r17, r1, PTO+PT_R17 /* save special purpose registers to pt_regs */ mfs r11, rear; swi r11, r1, PTO+PT_EAR; @@ -797,8 +799,6 @@ C_ENTRY(_debug_exception): addik r1, r1, -STATE_SAVE_SIZE; /* Make room on the stack. */ SAVE_REGS; - swi r17, r1, PTO+PT_R17; - swi r16, r1, PTO+PT_R16; swi r16, r1, PTO+PT_PC; /* Save LP */ swi r0, r1, PTO + PT_MODE; /* Was in user-mode. */ lwi r11, r0, TOPHYS(PER_CPU(ENTRY_SP)); @@ -844,8 +844,6 @@ dbtrap_call: /* Return point for kernel/user entry + 8 because of rtsd r15, 8 */ tophys(r1,r1); /* MS: Restore all regs */ RESTORE_REGS - lwi r17, r1, PTO+PT_R17; - lwi r16, r1, PTO+PT_R16; addik r1, r1, STATE_SAVE_SIZE /* Clean up stack space */ lwi r1, r1, PT_R1 - PT_SIZE; /* Restore user stack pointer */ DBTRAP_return_user: /* MS: Make global symbol for debugging */ @@ -859,7 +857,6 @@ DBTRAP_return_user: /* MS: Make global symbol for debugging */ RESTORE_REGS lwi r14, r1, PTO+PT_R14; lwi r16, r1, PTO+PT_PC; - lwi r17, r1, PTO+PT_R17; addik r1, r1, STATE_SAVE_SIZE; /* MS: Clean up stack space */ tovirt(r1,r1); DBTRAP_return_kernel: /* MS: Make global symbol for debugging */ |