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authorBecky Bruce <bgill@freescale.com>2006-04-18 14:29:34 -0500
committerPaul Mackerras <paulus@samba.org>2006-04-21 22:33:22 +1000
commitea1e847cc202e805769c3c46ba5e5c53714068a1 (patch)
tree4f35175c166f42a5b839af5dfe7e39155666b1fc /arch/ppc/kernel
parent23b2527d5eae89841eb66b46e80ec91980493dda (diff)
downloadlinux-linaro-stable-ea1e847cc202e805769c3c46ba5e5c53714068a1.tar.gz
[PATCH] ppc: Fix powersave code on arch/ppc
Fix asm_offsets.c and entry.S to work with the new power save code. Changes in arch/powerpc needed to exist in arch/ppc as well since the idle code is shared by both ppc and powerpc.. Signed-off-by: Becky Bruce <becky.bruce@freescale.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/ppc/kernel')
-rw-r--r--arch/ppc/kernel/asm-offsets.c1
-rw-r--r--arch/ppc/kernel/entry.S33
2 files changed, 17 insertions, 17 deletions
diff --git a/arch/ppc/kernel/asm-offsets.c b/arch/ppc/kernel/asm-offsets.c
index 77e4dc780f8c..cc7c4aea9397 100644
--- a/arch/ppc/kernel/asm-offsets.c
+++ b/arch/ppc/kernel/asm-offsets.c
@@ -134,6 +134,7 @@ main(void)
DEFINE(TI_TASK, offsetof(struct thread_info, task));
DEFINE(TI_EXECDOMAIN, offsetof(struct thread_info, exec_domain));
DEFINE(TI_FLAGS, offsetof(struct thread_info, flags));
+ DEFINE(TI_LOCAL_FLAGS, offsetof(struct thread_info, flags));
DEFINE(TI_CPU, offsetof(struct thread_info, cpu));
DEFINE(TI_PREEMPT, offsetof(struct thread_info, preempt_count));
diff --git a/arch/ppc/kernel/entry.S b/arch/ppc/kernel/entry.S
index 5891ecbdc703..1adc9145516f 100644
--- a/arch/ppc/kernel/entry.S
+++ b/arch/ppc/kernel/entry.S
@@ -128,29 +128,26 @@ transfer_to_handler:
stw r12,4(r11)
#endif
b 3f
+
2: /* if from kernel, check interrupted DOZE/NAP mode and
* check for stack overflow
*/
+ lwz r9,THREAD_INFO-THREAD(r12)
+ cmplw r1,r9 /* if r1 <= current->thread_info */
+ ble- stack_ovf /* then the kernel stack overflowed */
+5:
#ifdef CONFIG_6xx
- mfspr r11,SPRN_HID0
- mtcr r11
-BEGIN_FTR_SECTION
- bt- 8,4f /* Check DOZE */
-END_FTR_SECTION_IFSET(CPU_FTR_CAN_DOZE)
-BEGIN_FTR_SECTION
- bt- 9,4f /* Check NAP */
-END_FTR_SECTION_IFSET(CPU_FTR_CAN_NAP)
+ tophys(r9,r9) /* check local flags */
+ lwz r12,TI_LOCAL_FLAGS(r9)
+ mtcrf 0x01,r12
+ bt- 31-TLF_NAPPING,4f
#endif /* CONFIG_6xx */
.globl transfer_to_handler_cont
transfer_to_handler_cont:
- lwz r11,THREAD_INFO-THREAD(r12)
- cmplw r1,r11 /* if r1 <= current->thread_info */
- ble- stack_ovf /* then the kernel stack overflowed */
3:
mflr r9
lwz r11,0(r9) /* virtual address of handler */
lwz r9,4(r9) /* where to go when done */
- FIX_SRR1(r10,r12)
mtspr SPRN_SRR0,r11
mtspr SPRN_SRR1,r10
mtlr r9
@@ -158,7 +155,9 @@ transfer_to_handler_cont:
RFI /* jump to handler, enable MMU */
#ifdef CONFIG_6xx
-4: b power_save_6xx_restore
+4: rlwinm r12,r12,0,~_TLF_NAPPING
+ stw r12,TI_LOCAL_FLAGS(r9)
+ b power_save_6xx_restore
#endif
/*
@@ -167,10 +166,10 @@ transfer_to_handler_cont:
*/
stack_ovf:
/* sometimes we use a statically-allocated stack, which is OK. */
- lis r11,_end@h
- ori r11,r11,_end@l
- cmplw r1,r11
- ble 3b /* r1 <= &_end is OK */
+ lis r12,_end@h
+ ori r12,r12,_end@l
+ cmplw r1,r12
+ ble 5b /* r1 <= &_end is OK */
SAVE_NVGPRS(r11)
addi r3,r1,STACK_FRAME_OVERHEAD
lis r1,init_thread_union@ha