diff options
Diffstat (limited to 'arch/powerpc/kernel/smp.c')
-rw-r--r-- | arch/powerpc/kernel/smp.c | 94 |
1 files changed, 63 insertions, 31 deletions
diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c index b744114..fa8e870 100644 --- a/arch/powerpc/kernel/smp.c +++ b/arch/powerpc/kernel/smp.c @@ -111,35 +111,6 @@ int __devinit smp_generic_kick_cpu(int nr) } #endif -void smp_message_recv(int msg) -{ - switch(msg) { - case PPC_MSG_CALL_FUNCTION: - generic_smp_call_function_interrupt(); - break; - case PPC_MSG_RESCHEDULE: - /* we notice need_resched on exit */ - break; - case PPC_MSG_CALL_FUNC_SINGLE: - generic_smp_call_function_single_interrupt(); - break; - case PPC_MSG_DEBUGGER_BREAK: - if (crash_ipi_function_ptr) { - crash_ipi_function_ptr(get_irq_regs()); - break; - } -#ifdef CONFIG_DEBUGGER - debugger_ipi(get_irq_regs()); - break; -#endif /* CONFIG_DEBUGGER */ - /* FALLTHROUGH */ - default: - printk("SMP %d: smp_message_recv(): unknown msg %d\n", - smp_processor_id(), msg); - break; - } -} - static irqreturn_t call_function_action(int irq, void *data) { generic_smp_call_function_interrupt(); @@ -158,9 +129,17 @@ static irqreturn_t call_function_single_action(int irq, void *data) return IRQ_HANDLED; } -static irqreturn_t debug_ipi_action(int irq, void *data) +irqreturn_t debug_ipi_action(int irq, void *data) { - smp_message_recv(PPC_MSG_DEBUGGER_BREAK); + if (crash_ipi_function_ptr) { + crash_ipi_function_ptr(get_irq_regs()); + return IRQ_HANDLED; + } + +#ifdef CONFIG_DEBUGGER + debugger_ipi(get_irq_regs()); +#endif /* CONFIG_DEBUGGER */ + return IRQ_HANDLED; } @@ -199,6 +178,59 @@ int smp_request_message_ipi(int virq, int msg) return err; } +struct cpu_messages { + unsigned long messages; /* current messages bits */ + unsigned long data; /* data for cause ipi */ +}; +static DEFINE_PER_CPU_SHARED_ALIGNED(struct cpu_messages, ipi_message); + +void smp_muxed_ipi_set_data(int cpu, unsigned long data) +{ + struct cpu_messages *info = &per_cpu(ipi_message, cpu); + + info->data = data; +} + +void smp_muxed_ipi_message_pass(int cpu, int msg) +{ + struct cpu_messages *info = &per_cpu(ipi_message, cpu); + unsigned long *tgt = &info->messages; + + set_bit(msg, tgt); + mb(); + smp_ops->cause_ipi(cpu, info->data); +} + +void smp_muxed_ipi_resend(void) +{ + struct cpu_messages *info = &__get_cpu_var(ipi_message); + unsigned long *tgt = &info->messages; + + if (*tgt) + smp_ops->cause_ipi(smp_processor_id(), info->data); +} + +irqreturn_t smp_ipi_demux(void) +{ + struct cpu_messages *info = &__get_cpu_var(ipi_message); + unsigned long *tgt = &info->messages; + + mb(); /* order any irq clear */ + while (*tgt) { + if (test_and_clear_bit(PPC_MSG_CALL_FUNCTION, tgt)) + generic_smp_call_function_interrupt(); + if (test_and_clear_bit(PPC_MSG_RESCHEDULE, tgt)) + reschedule_action(0, NULL); /* upcoming sched hook */ + if (test_and_clear_bit(PPC_MSG_CALL_FUNC_SINGLE, tgt)) + generic_smp_call_function_single_interrupt(); +#if defined(CONFIG_DEBUGGER) || defined(CONFIG_KEXEC) + if (test_and_clear_bit(PPC_MSG_DEBUGGER_BREAK, tgt)) + debug_ipi_action(0, NULL); +#endif + } + return IRQ_HANDLED; +} + void smp_send_reschedule(int cpu) { if (likely(smp_ops)) |