diff options
Diffstat (limited to 'arch/powerpc/kernel/idle_power4.S')
| -rw-r--r-- | arch/powerpc/kernel/idle_power4.S | 21 |
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) | |||
| 53 | isync | 53 | isync |
| 54 | b 1b | 54 | b 1b |
| 55 | 55 | ||
| 56 | _GLOBAL(power4_cpu_offline_powersave) | ||
| 57 | /* Go to NAP now */ | ||
| 58 | mfmsr r7 | ||
| 59 | rldicl r0,r7,48,1 | ||
| 60 | rotldi r0,r0,16 | ||
| 61 | mtmsrd r0,1 /* hard-disable interrupts */ | ||
| 62 | li r0,1 | ||
| 63 | li r6,0 | ||
| 64 | stb r0,PACAHARDIRQEN(r13) /* we'll hard-enable shortly */ | ||
| 65 | stb r6,PACASOFTIRQEN(r13) /* soft-disable irqs */ | ||
| 66 | BEGIN_FTR_SECTION | ||
| 67 | DSSALL | ||
| 68 | sync | ||
| 69 | END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC) | ||
| 70 | ori r7,r7,MSR_EE | ||
| 71 | oris r7,r7,MSR_POW@h | ||
| 72 | sync | ||
| 73 | isync | ||
| 74 | mtmsrd r7 | ||
| 75 | isync | ||
| 76 | blr | ||