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-rw-r--r--arch/powerpc/kernel/idle_power4.S21
1 files changed, 21 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/idle_power4.S b/arch/powerpc/kernel/idle_power4.S
index ba3195478600..5328709eeedc 100644
--- a/arch/powerpc/kernel/idle_power4.S
+++ b/arch/powerpc/kernel/idle_power4.S
@@ -53,3 +53,24 @@ END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC)
isync
b 1b
+_GLOBAL(power4_cpu_offline_powersave)
+ /* Go to NAP now */
+ mfmsr r7
+ rldicl r0,r7,48,1
+ rotldi r0,r0,16
+ mtmsrd r0,1 /* hard-disable interrupts */
+ li r0,1
+ li r6,0
+ stb r0,PACAHARDIRQEN(r13) /* we'll hard-enable shortly */
+ stb r6,PACASOFTIRQEN(r13) /* soft-disable irqs */
+BEGIN_FTR_SECTION
+ DSSALL
+ sync
+END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC)
+ ori r7,r7,MSR_EE
+ oris r7,r7,MSR_POW@h
+ sync
+ isync
+ mtmsrd r7
+ isync
+ blr