diff options
author | Bob Liu <lliubbo@gmail.com> | 2011-12-12 11:04:05 +0800 |
---|---|---|
committer | Bob Liu <lliubbo@gmail.com> | 2012-01-09 10:26:15 +0800 |
commit | d0014be47dc90d15adf7d6e09031d06e2aa7ce79 (patch) | |
tree | 1f633a783e6536a0e24ad0453533882dc21ca1bd /arch | |
parent | 16df3666f43507a6d21e192dae39b69cafc17089 (diff) |
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')
-rw-r--r-- | arch/blackfin/include/asm/cpu.h | 3 | ||||
-rw-r--r-- | arch/blackfin/include/asm/smp.h | 5 | ||||
-rw-r--r-- | arch/blackfin/kernel/time-ts.c | 26 | ||||
-rw-r--r-- | arch/blackfin/mach-bf561/include/mach/pll.h | 4 | ||||
-rw-r--r-- | arch/blackfin/mach-bf561/smp.c | 2 | ||||
-rw-r--r-- | arch/blackfin/mach-common/smp.c | 53 |
6 files changed, 77 insertions, 16 deletions
diff --git a/arch/blackfin/include/asm/cpu.h b/arch/blackfin/include/asm/cpu.h index 05043786da2..e349631c829 100644 --- a/arch/blackfin/include/asm/cpu.h +++ b/arch/blackfin/include/asm/cpu.h @@ -14,6 +14,9 @@ struct blackfin_cpudata { struct cpu cpu; unsigned int imemctl; unsigned int dmemctl; +#ifdef CONFIG_SMP + struct task_struct *idle; +#endif }; DECLARE_PER_CPU(struct blackfin_cpudata, cpu_data); diff --git a/arch/blackfin/include/asm/smp.h b/arch/blackfin/include/asm/smp.h index af6c0aa79ba..dc3d144b4bb 100644 --- a/arch/blackfin/include/asm/smp.h +++ b/arch/blackfin/include/asm/smp.h @@ -37,7 +37,7 @@ extern unsigned long dcache_invld_count[NR_CPUS]; #endif void smp_icache_flush_range_others(unsigned long start, - unsigned long end); + unsigned long end); #ifdef CONFIG_HOTPLUG_CPU void coreb_die(void); void cpu_die(void); @@ -46,4 +46,7 @@ int __cpu_disable(void); int __cpu_die(unsigned int cpu); #endif +void smp_timer_broadcast(const struct cpumask *mask); + + #endif /* !__ASM_BLACKFIN_SMP_H */ diff --git a/arch/blackfin/kernel/time-ts.c b/arch/blackfin/kernel/time-ts.c index 1bcf3a3c57d..6efd944a2f3 100644 --- a/arch/blackfin/kernel/time-ts.c +++ b/arch/blackfin/kernel/time-ts.c @@ -219,7 +219,7 @@ static void __init bfin_gptmr0_clockevent_init(struct clock_event_device *evt) #if defined(CONFIG_TICKSOURCE_CORETMR) /* per-cpu local core timer */ -static DEFINE_PER_CPU(struct clock_event_device, coretmr_events); +DEFINE_PER_CPU(struct clock_event_device, coretmr_events); static int bfin_coretmr_set_next_event(unsigned long cycles, struct clock_event_device *evt) @@ -281,6 +281,25 @@ void bfin_coretmr_init(void) #ifdef CONFIG_CORE_TIMER_IRQ_L1 __attribute__((l1_text)) #endif + +static void broadcast_timer_set_mode(enum clock_event_mode mode, + struct clock_event_device *evt) +{ +} + +static void __cpuinit broadcast_timer_setup(struct clock_event_device *evt) +{ + evt->name = "dummy_timer"; + evt->features = CLOCK_EVT_FEAT_ONESHOT | + CLOCK_EVT_FEAT_PERIODIC | + CLOCK_EVT_FEAT_DUMMY; + evt->rating = 400; + evt->mult = 1; + evt->set_mode = broadcast_timer_set_mode; + + clockevents_register_device(evt); +} + irqreturn_t bfin_coretmr_interrupt(int irq, void *dev_id) { int cpu = smp_processor_id(); @@ -306,6 +325,11 @@ void bfin_coretmr_clockevent_init(void) unsigned int cpu = smp_processor_id(); struct clock_event_device *evt = &per_cpu(coretmr_events, cpu); +#ifdef CONFIG_SMP + evt->broadcast = smp_timer_broadcast; +#endif + + evt->name = "bfin_core_timer"; evt->rating = 350; evt->irq = -1; diff --git a/arch/blackfin/mach-bf561/include/mach/pll.h b/arch/blackfin/mach-bf561/include/mach/pll.h index 7977db2f1c1..00bdacee9cc 100644 --- a/arch/blackfin/mach-bf561/include/mach/pll.h +++ b/arch/blackfin/mach-bf561/include/mach/pll.h @@ -16,6 +16,7 @@ #include <mach/irq.h> #define SUPPLE_0_WAKEUP ((IRQ_SUPPLE_0 - (IRQ_CORETMR + 1)) % 32) +#define SUPPLE_1_WAKEUP ((IRQ_SUPPLE_1 - (IRQ_CORETMR + 1)) % 32) static inline void bfin_iwr_restore(unsigned long iwr0, unsigned long iwr1, unsigned long iwr2) @@ -42,7 +43,8 @@ bfin_iwr_save(unsigned long niwr0, unsigned long niwr1, unsigned long niwr2, static inline void bfin_iwr_set_sup0(unsigned long *iwr0, unsigned long *iwr1, unsigned long *iwr2) { - bfin_iwr_save(0, IWR_ENABLE(SUPPLE_0_WAKEUP), 0, iwr0, iwr1, iwr2); + bfin_iwr_save(0, IWR_ENABLE(SUPPLE_0_WAKEUP) | + IWR_ENABLE(SUPPLE_1_WAKEUP), 0, iwr0, iwr1, iwr2); } #endif diff --git a/arch/blackfin/mach-bf561/smp.c b/arch/blackfin/mach-bf561/smp.c index b2a6b77efad..ab1c617b9cf 100644 --- a/arch/blackfin/mach-bf561/smp.c +++ b/arch/blackfin/mach-bf561/smp.c @@ -84,7 +84,7 @@ int __cpuinit platform_boot_secondary(unsigned int cpu, struct task_struct *idle if ((bfin_read_SYSCR() & COREB_SRAM_INIT) == 0) { /* CoreB already running, sending ipi to wakeup it */ - platform_send_ipi_cpu(cpu, IRQ_SUPPLE_0); + smp_send_reschedule(cpu); } else { /* Kick CoreB, which should start execution from CORE_SRAM_BASE. */ bfin_write_SYSCR(bfin_read_SYSCR() & ~COREB_SRAM_INIT); diff --git a/arch/blackfin/mach-common/smp.c b/arch/blackfin/mach-common/smp.c index 0784a52389c..d3464053dfd 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 |