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microblaze: Fix r16 and r17 reg saving

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r16 and r17 should be saved across interrupt and exception handling.

Signed-off-by: Michal Simek <monstr@monstr.eu>
This commit is contained in:
Michal Simek 2010-08-09 14:37:42 +02:00
parent 36cf089dc6
commit 600eb6110a
1 changed files with 4 additions and 7 deletions
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11
arch/microblaze/kernel/entry.S
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@ -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 */