diff options
Diffstat (limited to 'arch/powerpc/kernel/smp.c')
| -rw-r--r-- | arch/powerpc/kernel/smp.c | 71 |
1 files changed, 63 insertions, 8 deletions
diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c index ff9f7010097..8ac3f721d23 100644 --- a/arch/powerpc/kernel/smp.c +++ b/arch/powerpc/kernel/smp.c @@ -57,7 +57,6 @@ #define DBG(fmt...) #endif -int smp_hw_index[NR_CPUS]; struct thread_info *secondary_ti; cpumask_t cpu_possible_map = CPU_MASK_NONE; @@ -123,6 +122,65 @@ void smp_message_recv(int msg) } } +static irqreturn_t call_function_action(int irq, void *data) +{ + generic_smp_call_function_interrupt(); + return IRQ_HANDLED; +} + +static irqreturn_t reschedule_action(int irq, void *data) +{ + /* we just need the return path side effect of checking need_resched */ + return IRQ_HANDLED; +} + +static irqreturn_t call_function_single_action(int irq, void *data) +{ + generic_smp_call_function_single_interrupt(); + return IRQ_HANDLED; +} + +static irqreturn_t debug_ipi_action(int irq, void *data) +{ + smp_message_recv(PPC_MSG_DEBUGGER_BREAK); + return IRQ_HANDLED; +} + +static irq_handler_t smp_ipi_action[] = { + [PPC_MSG_CALL_FUNCTION] = call_function_action, + [PPC_MSG_RESCHEDULE] = reschedule_action, + [PPC_MSG_CALL_FUNC_SINGLE] = call_function_single_action, + [PPC_MSG_DEBUGGER_BREAK] = debug_ipi_action, +}; + +const char *smp_ipi_name[] = { + [PPC_MSG_CALL_FUNCTION] = "ipi call function", + [PPC_MSG_RESCHEDULE] = "ipi reschedule", + [PPC_MSG_CALL_FUNC_SINGLE] = "ipi call function single", + [PPC_MSG_DEBUGGER_BREAK] = "ipi debugger", +}; + +/* optional function to request ipi, for controllers with >= 4 ipis */ +int smp_request_message_ipi(int virq, int msg) +{ + int err; + + if (msg < 0 || msg > PPC_MSG_DEBUGGER_BREAK) { + return -EINVAL; + } +#if !defined(CONFIG_DEBUGGER) && !defined(CONFIG_KEXEC) + if (msg == PPC_MSG_DEBUGGER_BREAK) { + return 1; + } +#endif + err = request_irq(virq, smp_ipi_action[msg], IRQF_DISABLED|IRQF_PERCPU, + smp_ipi_name[msg], 0); + WARN(err < 0, "unable to request_irq %d for %s (rc %d)\n", + virq, smp_ipi_name[msg], err); + + return err; +} + void smp_send_reschedule(int cpu) { if (likely(smp_ops)) @@ -408,8 +466,7 @@ out: static struct device_node *cpu_to_l2cache(int cpu) { struct device_node *np; - const phandle *php; - phandle ph; + struct device_node *cache; if (!cpu_present(cpu)) return NULL; @@ -418,13 +475,11 @@ static struct device_node *cpu_to_l2cache(int cpu) if (np == NULL) return NULL; - php = of_get_property(np, "l2-cache", NULL); - if (php == NULL) - return NULL; - ph = *php; + cache = of_find_next_cache_node(np); + of_node_put(np); - return of_find_node_by_phandle(ph); + return cache; } /* Activate a secondary processor. */ |