diff options
Diffstat (limited to 'arch/powerpc/platforms/powermac/smp.c')
| -rw-r--r-- | arch/powerpc/platforms/powermac/smp.c | 58 |
1 files changed, 55 insertions, 3 deletions
diff --git a/arch/powerpc/platforms/powermac/smp.c b/arch/powerpc/platforms/powermac/smp.c index eda470913291..50e15b43ffad 100644 --- a/arch/powerpc/platforms/powermac/smp.c +++ b/arch/powerpc/platforms/powermac/smp.c @@ -865,7 +865,7 @@ static void __devinit smp_core99_setup_cpu(int cpu_nr) } -#if defined(CONFIG_HOTPLUG_CPU) && defined(CONFIG_PPC32) +#ifdef CONFIG_HOTPLUG_CPU static int smp_core99_cpu_disable(void) { @@ -878,7 +878,9 @@ static int smp_core99_cpu_disable(void) return 0; } -void pmac32_cpu_die(void) +#ifdef CONFIG_PPC32 + +static void pmac_cpu_die(void) { local_irq_disable(); idle_task_exit(); @@ -889,7 +891,52 @@ void pmac32_cpu_die(void) low_cpu_die(); } -#endif /* CONFIG_HOTPLUG_CPU && CONFIG_PP32 */ +#else /* CONFIG_PPC32 */ + +static void pmac_cpu_die(void) +{ + local_irq_disable(); + idle_task_exit(); + + /* + * turn off as much as possible, we'll be + * kicked out as this will only be invoked + * on core99 platforms for now ... + */ + + printk(KERN_INFO "CPU#%d offline\n", smp_processor_id()); + __get_cpu_var(cpu_state) = CPU_DEAD; + smp_wmb(); + + /* + * during the path that leads here preemption is disabled, + * reenable it now so that when coming up preempt count is + * zero correctly + */ + preempt_enable(); + + /* + * hard-disable interrupts for the non-NAP case, the NAP code + * needs to re-enable interrupts (but soft-disables them) + */ + hard_irq_disable(); + + while (1) { + /* let's not take timer interrupts too often ... */ + set_dec(0x7fffffff); + + /* should always be true at this point */ + if (cpu_has_feature(CPU_FTR_CAN_NAP)) + power4_cpu_offline_powersave(); + else { + HMT_low(); + HMT_very_low(); + } + } +} + +#endif /* else CONFIG_PPC32 */ +#endif /* CONFIG_HOTPLUG_CPU */ /* Core99 Macs (dual G4s and G5s) */ struct smp_ops_t core99_smp_ops = { @@ -933,5 +980,10 @@ void __init pmac_setup_smp(void) smp_ops = &psurge_smp_ops; } #endif /* CONFIG_PPC32 */ + +#ifdef CONFIG_HOTPLUG_CPU + ppc_md.cpu_die = pmac_cpu_die; +#endif } + |