diff options
Diffstat (limited to 'arch/powerpc/kernel/idle.c')
| -rw-r--r-- | arch/powerpc/kernel/idle.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/idle.c b/arch/powerpc/kernel/idle.c index a36fd053c3db..422e31d2f5a2 100644 --- a/arch/powerpc/kernel/idle.c +++ b/arch/powerpc/kernel/idle.c @@ -77,6 +77,31 @@ void arch_cpu_idle(void) int powersave_nap; +#ifdef CONFIG_PPC_970_NAP +void power4_idle(void) +{ + if (!cpu_has_feature(CPU_FTR_CAN_NAP)) + return; + + if (!powersave_nap) + return; + + if (!prep_irq_for_idle()) + return; + + if (cpu_has_feature(CPU_FTR_ALTIVEC)) + asm volatile("DSSALL ; sync" ::: "memory"); + + power4_idle_nap(); + + /* + * power4_idle_nap returns with interrupts enabled (soft and hard). + * to our caller with interrupts enabled (soft and hard). Our caller + * can cope with either interrupts disabled or enabled upon return. + */ +} +#endif + #ifdef CONFIG_SYSCTL /* * Register the sysctl to set/clear powersave_nap. |