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| author | Ralf Baechle <ralf@linux-mips.org> | 2014-05-28 19:00:14 +0200 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2014-05-29 15:08:23 +0200 |
| commit | 2e2d663d2dd64ffe9855be0b35aa221c9b8139f2 (patch) | |
| tree | 508667aa6fbab564e7875d3953671265d0176e69 /arch/mips/kernel/smp.c | |
| parent | MIPS: SNI: Remove USE_GENERIC_EARLY_PRINTK_8250 (diff) | |
| parent | MIPS: Malta: CPS SMP by default (diff) | |
| download | linux-2e2d663d2dd64ffe9855be0b35aa221c9b8139f2.tar.xz linux-2e2d663d2dd64ffe9855be0b35aa221c9b8139f2.zip | |
Merge branch 'wip-mips-pm' of https://github.com/paulburton/linux into mips-for-linux-next
Diffstat (limited to 'arch/mips/kernel/smp.c')
| -rw-r--r-- | arch/mips/kernel/smp.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/arch/mips/kernel/smp.c b/arch/mips/kernel/smp.c index ce7677523b68..9bad52ede903 100644 --- a/arch/mips/kernel/smp.c +++ b/arch/mips/kernel/smp.c @@ -62,6 +62,8 @@ EXPORT_SYMBOL(cpu_sibling_map); /* representing cpus for which sibling maps can be computed */ static cpumask_t cpu_sibling_setup_map; +cpumask_t cpu_coherent_mask; + static inline void set_cpu_sibling_map(int cpu) { int i; @@ -114,6 +116,7 @@ asmlinkage void start_secondary(void) cpu = smp_processor_id(); cpu_data[cpu].udelay_val = loops_per_jiffy; + cpu_set(cpu, cpu_coherent_mask); notify_cpu_starting(cpu); set_cpu_online(cpu, true); @@ -175,6 +178,7 @@ void __init smp_prepare_cpus(unsigned int max_cpus) #ifndef CONFIG_HOTPLUG_CPU init_cpu_present(cpu_possible_mask); #endif + cpumask_copy(&cpu_coherent_mask, cpu_possible_mask); } /* preload SMP state for boot cpu */ @@ -390,3 +394,46 @@ void dump_send_ipi(void (*dump_ipi_callback)(void *)) } EXPORT_SYMBOL(dump_send_ipi); #endif + +#ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST + +static DEFINE_PER_CPU(atomic_t, tick_broadcast_count); +static DEFINE_PER_CPU(struct call_single_data, tick_broadcast_csd); + +void tick_broadcast(const struct cpumask *mask) +{ + atomic_t *count; + struct call_single_data *csd; + int cpu; + + for_each_cpu(cpu, mask) { + count = &per_cpu(tick_broadcast_count, cpu); + csd = &per_cpu(tick_broadcast_csd, cpu); + + if (atomic_inc_return(count) == 1) + smp_call_function_single_async(cpu, csd); + } +} + +static void tick_broadcast_callee(void *info) +{ + int cpu = smp_processor_id(); + tick_receive_broadcast(); + atomic_set(&per_cpu(tick_broadcast_count, cpu), 0); +} + +static int __init tick_broadcast_init(void) +{ + struct call_single_data *csd; + int cpu; + + for (cpu = 0; cpu < NR_CPUS; cpu++) { + csd = &per_cpu(tick_broadcast_csd, cpu); + csd->func = tick_broadcast_callee; + } + + return 0; +} +early_initcall(tick_broadcast_init); + +#endif /* CONFIG_GENERIC_CLOCKEVENTS_BROADCAST */ |