[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>

diff --git a/arch/ppc/kernel/asm-offsets.c b/arch/ppc/kernel/asm-offsets.c
index 77e4dc780f8cfa3efae51e0f1a088a1c9123bcfc..cc7c4aea939751a42985f5bc944614290993ffad 100644 (file)
--- 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 5891ecbdc703294d0de7736cd4a94da57bdaffc0..1adc9145516f9eaf88a14047031038821ee67940 100644 (file)
--- 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