diff options
| author | Bob Liu <lliubbo@gmail.com> | 2011-12-12 07:04:05 +0400 |
|---|---|---|
| committer | Bob Liu <lliubbo@gmail.com> | 2012-01-09 06:26:15 +0400 |
| commit | d0014be47dc90d15adf7d6e09031d06e2aa7ce79 (patch) | |
| tree | 1f633a783e6536a0e24ad0453533882dc21ca1bd /arch/blackfin/mach-common/smp.c | |
| parent | 16df3666f43507a6d21e192dae39b69cafc17089 (diff) | |
| download | linux-d0014be47dc90d15adf7d6e09031d06e2aa7ce79.tar.xz | |
blackfin: smp: cleanup smp code
move idle task point to percpu blackfin_cpudata and add smp_timer_broadcast
interface.
enable SUPPLE_1_WAKEUP and add BFIN_IPI_TIMER ipi support.
Signed-off-by: Steven Miao <realmz6@gmail.com>
Signed-off-by: Bob Liu <lliubbo@gmail.com>
Diffstat (limited to 'arch/blackfin/mach-common/smp.c')
| -rw-r--r-- | arch/blackfin/mach-common/smp.c | 53 |
1 files changed, 41 insertions, 12 deletions
diff --git a/arch/blackfin/mach-common/smp.c b/arch/blackfin/mach-common/smp.c index 0784a52389c8..d3464053dfdb 100644 --- a/arch/blackfin/mach-common/smp.c +++ b/arch/blackfin/mach-common/smp.c @@ -14,6 +14,7 @@ #include <linux/sched.h> #include <linux/interrupt.h> #include <linux/cache.h> +#include <linux/clockchips.h> #include <linux/profile.h> #include <linux/errno.h> #include <linux/mm.h> @@ -47,9 +48,10 @@ unsigned long blackfin_iflush_l1_entry[NR_CPUS]; struct blackfin_initial_pda __cpuinitdata initial_pda_coreb; -#define BFIN_IPI_RESCHEDULE 0 -#define BFIN_IPI_CALL_FUNC 1 -#define BFIN_IPI_CPU_STOP 2 +#define BFIN_IPI_TIMER 0 +#define BFIN_IPI_RESCHEDULE 1 +#define BFIN_IPI_CALL_FUNC 2 +#define BFIN_IPI_CPU_STOP 3 struct blackfin_flush_data { unsigned long start; @@ -160,6 +162,14 @@ static irqreturn_t ipi_handler_int0(int irq, void *dev_instance) return IRQ_HANDLED; } +DECLARE_PER_CPU(struct clock_event_device, coretmr_events); +void ipi_timer(void) +{ + int cpu = smp_processor_id(); + struct clock_event_device *evt = &per_cpu(coretmr_events, cpu); + evt->event_handler(evt); +} + static irqreturn_t ipi_handler_int1(int irq, void *dev_instance) { struct ipi_message *msg; @@ -176,6 +186,9 @@ static irqreturn_t ipi_handler_int1(int irq, void *dev_instance) while (msg_queue->count) { msg = &msg_queue->ipi_message[msg_queue->head]; switch (msg->type) { + case BFIN_IPI_TIMER: + ipi_timer(); + break; case BFIN_IPI_RESCHEDULE: scheduler_ipi(); break; @@ -297,8 +310,6 @@ void smp_send_reschedule(int cpu) { cpumask_t callmap; /* simply trigger an ipi */ - if (cpu_is_offline(cpu)) - return; cpumask_clear(&callmap); cpumask_set_cpu(cpu, &callmap); @@ -308,6 +319,16 @@ void smp_send_reschedule(int cpu) return; } +void smp_send_msg(const struct cpumask *mask, unsigned long type) +{ + smp_send_message(*mask, type, NULL, NULL, 0); +} + +void smp_timer_broadcast(const struct cpumask *mask) +{ + smp_send_msg(mask, BFIN_IPI_TIMER); +} + void smp_send_stop(void) { cpumask_t callmap; @@ -326,17 +347,24 @@ void smp_send_stop(void) int __cpuinit __cpu_up(unsigned int cpu) { int ret; - static struct task_struct *idle; + struct blackfin_cpudata *ci = &per_cpu(cpu_data, cpu); + struct task_struct *idle = ci->idle; - if (idle) + if (idle) { free_task(idle); - - idle = fork_idle(cpu); - if (IS_ERR(idle)) { - printk(KERN_ERR "CPU%u: fork() failed\n", cpu); - return PTR_ERR(idle); + idle = NULL; } + if (!idle) { + idle = fork_idle(cpu); + if (IS_ERR(idle)) { + printk(KERN_ERR "CPU%u: fork() failed\n", cpu); + return PTR_ERR(idle); + } + ci->idle = idle; + } else { + init_idle(idle, cpu); + } secondary_stack = task_stack_page(idle) + THREAD_SIZE; ret = platform_boot_secondary(cpu, idle); @@ -411,6 +439,7 @@ void __cpuinit secondary_start_kernel(void) bfin_setup_caches(cpu); + notify_cpu_starting(cpu); /* * Calibrate loops per jiffy value. * IRQs need to be enabled here - D-cache can be invalidated |