1 files changed, 37 insertions, 47 deletions

diff --git a/arch/arm/kernel/sleep.S b/arch/arm/kernel/sleep.S
index 6398ead9d1c0..dc902f2c6845 100644
--- a/arch/arm/kernel/sleep.S
+++ b/arch/arm/kernel/sleep.S
@@ -10,64 +10,61 @@
 /*
  * Save CPU state for a suspend
  *  r1 = v:p offset
- *  r3 = virtual return function
- * Note: sp is decremented to allocate space for CPU state on stack
- * r0-r3,r9,r10,lr corrupted
+ *  r2 = suspend function arg0
+ *  r3 = suspend function
  */
-ENTRY(cpu_suspend)
-        mov     r9, lr
+ENTRY(__cpu_suspend)
+        stmfd   sp!, {r4 - r11, lr}
 #ifdef MULTI_CPU
         ldr     r10, =processor
-        mov     r2, sp                  @ current virtual SP
-        ldr     r0, [r10, #CPU_SLEEP_SIZE] @ size of CPU sleep state
+        ldr     r5, [r10, #CPU_SLEEP_SIZE] @ size of CPU sleep state
         ldr     ip, [r10, #CPU_DO_RESUME] @ virtual resume function
-        sub     sp, sp, r0              @ allocate CPU state on stack
-        mov     r0, sp                  @ save pointer
+#else
+        ldr     r5, =cpu_suspend_size
+        ldr     ip, =cpu_do_resume
+#endif
+        mov     r6, sp                  @ current virtual SP
+        sub     sp, sp, r5              @ allocate CPU state on stack
+        mov     r0, sp                  @ save pointer to CPU save block
         add     ip, ip, r1              @ convert resume fn to phys
-        stmfd   sp!, {r1, r2, r3, ip}   @ save v:p, virt SP, retfn, phys resume fn
-        ldr     r3, =sleep_save_sp
-        add     r2, sp, r1              @ convert SP to phys
+        stmfd   sp!, {r1, r6, ip}       @ save v:p, virt SP, phys resume fn
+        ldr     r5, =sleep_save_sp
+        add     r6, sp, r1              @ convert SP to phys
+        stmfd   sp!, {r2, r3}           @ save suspend func arg and pointer
 #ifdef CONFIG_SMP
         ALT_SMP(mrc p15, 0, lr, c0, c0, 5)
         ALT_UP(mov lr, #0)
         and     lr, lr, #15
-        str     r2, [r3, lr, lsl #2]    @ save phys SP
+        str     r6, [r5, lr, lsl #2]    @ save phys SP
 #else
-        str     r2, [r3]                @ save phys SP
+        str     r6, [r5]                @ save phys SP
 #endif
+#ifdef MULTI_CPU
         mov     lr, pc
         ldr     pc, [r10, #CPU_DO_SUSPEND] @ save CPU state
 #else
-        mov     r2, sp                  @ current virtual SP
-        ldr     r0, =cpu_suspend_size
-        sub     sp, sp, r0              @ allocate CPU state on stack
-        mov     r0, sp                  @ save pointer
-        stmfd   sp!, {r1, r2, r3}       @ save v:p, virt SP, return fn
-        ldr     r3, =sleep_save_sp
-        add     r2, sp, r1              @ convert SP to phys
-#ifdef CONFIG_SMP
-        ALT_SMP(mrc p15, 0, lr, c0, c0, 5)
-        ALT_UP(mov lr, #0)
-        and     lr, lr, #15
-        str     r2, [r3, lr, lsl #2]    @ save phys SP
-#else
-        str     r2, [r3]                @ save phys SP
-#endif
         bl      cpu_do_suspend
 #endif
 
         @ flush data cache
 #ifdef MULTI_CACHE
         ldr     r10, =cpu_cache
-        mov     lr, r9
+        mov     lr, pc
         ldr     pc, [r10, #CACHE_FLUSH_KERN_ALL]
 #else
-        mov     lr, r9
-        b       __cpuc_flush_kern_all
+        bl      __cpuc_flush_kern_all
 #endif
-ENDPROC(cpu_suspend)
+        adr     lr, BSYM(cpu_suspend_abort)
+        ldmfd   sp!, {r0, pc}           @ call suspend fn
+ENDPROC(__cpu_suspend)
         .ltorg
 
+cpu_suspend_abort:
+        ldmia   sp!, {r1 - r3}          @ pop v:p, virt SP, phys resume fn
+        mov     sp, r2
+        ldmfd   sp!, {r4 - r11, pc}
+ENDPROC(cpu_suspend_abort)
+
 /*
  * r0 = control register value
  * r1 = v:p offset (preserved by cpu_do_resume)
@@ -97,7 +94,9 @@ ENDPROC(cpu_resume_turn_mmu_on)
 cpu_resume_after_mmu:
         str     r5, [r2, r4, lsl #2]    @ restore old mapping
         mcr     p15, 0, r0, c1, c0, 0   @ turn on D-cache
-        mov     pc, lr
+        bl      cpu_init                @ restore the und/abt/irq banked regs
+        mov     r0, #0                  @ return zero on success
+        ldmfd   sp!, {r4 - r11, pc}
 ENDPROC(cpu_resume_after_mmu)
 
 /*
@@ -120,20 +119,11 @@ ENTRY(cpu_resume)
         ldr     r0, sleep_save_sp       @ stack phys addr
 #endif
         setmode PSR_I_BIT | PSR_F_BIT | SVC_MODE, r1  @ set SVC, irqs off
-#ifdef MULTI_CPU
-        @ load v:p, stack, return fn, resume fn
-  ARM(  ldmia   r0!, {r1, sp, lr, pc}   )
-THUMB(  ldmia   r0!, {r1, r2, r3, r4}   )
+        @ load v:p, stack, resume fn
+  ARM(  ldmia   r0!, {r1, sp, pc}       )
+THUMB(  ldmia   r0!, {r1, r2, r3}       )
 THUMB(  mov     sp, r2                  )
-THUMB(  mov     lr, r3                  )
-THUMB(  bx      r4                      )
-#else
-        @ load v:p, stack, return fn
-  ARM(  ldmia   r0!, {r1, sp, lr}       )
-THUMB(  ldmia   r0!, {r1, r2, lr}       )
-THUMB(  mov     sp, r2                  )
-        b       cpu_do_resume
-#endif
+THUMB(  bx      r3                      )
 ENDPROC(cpu_resume)
 
 sleep_save_sp: