diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/blackfin/Kconfig | 26 | ||||
| -rw-r--r-- | arch/blackfin/include/asm/time.h | 6 | ||||
| -rw-r--r-- | arch/blackfin/kernel/time-ts.c | 197 | ||||
| -rw-r--r-- | arch/blackfin/mach-bf561/include/mach/smp.h | 2 | ||||
| -rw-r--r-- | arch/blackfin/mach-bf561/smp.c | 18 | ||||
| -rw-r--r-- | arch/blackfin/mach-common/ints-priority.c | 3 | ||||
| -rw-r--r-- | arch/blackfin/mach-common/smp.c | 17 |
7 files changed, 146 insertions, 123 deletions
diff --git a/arch/blackfin/Kconfig b/arch/blackfin/Kconfig index b483639c80b..0bd26dbca09 100644 --- a/arch/blackfin/Kconfig +++ b/arch/blackfin/Kconfig @@ -236,7 +236,7 @@ endchoice config SMP depends on BF561 - select GENERIC_CLOCKEVENTS + select TICKSOURCE_CORETMR bool "Symmetric multi-processing support" ---help--- This enables support for systems with more than one CPU, @@ -610,23 +610,23 @@ config GENERIC_CLOCKEVENTS bool "Generic clock events" default y -choice - prompt "Kernel Tick Source" +menu "Clock event device" depends on GENERIC_CLOCKEVENTS - default TICKSOURCE_CORETMR - config TICKSOURCE_GPTMR0 - bool "Gptimer0 (SCLK domain)" + bool "GPTimer0" + depends on !SMP select BFIN_GPTIMERS config TICKSOURCE_CORETMR - bool "Core timer (CCLK domain)" - -endchoice + bool "Core timer" + default y +endmenu -config CYCLES_CLOCKSOURCE - bool "Use 'CYCLES' as a clocksource" +menu "Clock souce" depends on GENERIC_CLOCKEVENTS +config CYCLES_CLOCKSOURCE + bool "CYCLES" + default y depends on !BFIN_SCRATCH_REG_CYCLES depends on !SMP help @@ -637,10 +637,10 @@ config CYCLES_CLOCKSOURCE writing the registers will most likely crash the kernel. config GPTMR0_CLOCKSOURCE - bool "Use GPTimer0 as a clocksource" + bool "GPTimer0" select BFIN_GPTIMERS - depends on GENERIC_CLOCKEVENTS depends on !TICKSOURCE_GPTMR0 +endmenu config ARCH_USES_GETTIMEOFFSET depends on !GENERIC_CLOCKEVENTS diff --git a/arch/blackfin/include/asm/time.h b/arch/blackfin/include/asm/time.h index 589e937ed1e..767b938ccf8 100644 --- a/arch/blackfin/include/asm/time.h +++ b/arch/blackfin/include/asm/time.h @@ -37,5 +37,9 @@ extern unsigned long long __bfin_cycles_off; extern unsigned int __bfin_cycles_mod; #endif -extern void __init setup_core_timer(void); +#if defined(CONFIG_TICKSOURCE_CORETMR) +extern void bfin_coretmr_init(void); +extern void bfin_coretmr_clockevent_init(void); +#endif + #endif diff --git a/arch/blackfin/kernel/time-ts.c b/arch/blackfin/kernel/time-ts.c index 17c38c5b5b2..a351f97c87a 100644 --- a/arch/blackfin/kernel/time-ts.c +++ b/arch/blackfin/kernel/time-ts.c @@ -132,7 +132,6 @@ static int __init bfin_cs_gptimer0_init(void) # define bfin_cs_gptimer0_init() #endif - #if defined(CONFIG_GPTMR0_CLOCKSOURCE) || defined(CONFIG_CYCLES_CLOCKSOURCE) /* prefer to use cycles since it has higher rating */ notrace unsigned long long sched_clock(void) @@ -145,47 +144,8 @@ notrace unsigned long long sched_clock(void) } #endif -#ifdef CONFIG_CORE_TIMER_IRQ_L1 -__attribute__((l1_text)) -#endif -irqreturn_t timer_interrupt(int irq, void *dev_id); - -static int bfin_timer_set_next_event(unsigned long, \ - struct clock_event_device *); - -static void bfin_timer_set_mode(enum clock_event_mode, \ - struct clock_event_device *); - -static struct clock_event_device clockevent_bfin = { -#if defined(CONFIG_TICKSOURCE_GPTMR0) - .name = "bfin_gptimer0", - .rating = 300, - .irq = IRQ_TIMER0, -#else - .name = "bfin_core_timer", - .rating = 350, - .irq = IRQ_CORETMR, -#endif - .shift = 32, - .features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT, - .set_next_event = bfin_timer_set_next_event, - .set_mode = bfin_timer_set_mode, -}; - -static struct irqaction bfin_timer_irq = { -#if defined(CONFIG_TICKSOURCE_GPTMR0) - .name = "Blackfin GPTimer0", -#else - .name = "Blackfin CoreTimer", -#endif - .flags = IRQF_DISABLED | IRQF_TIMER | \ - IRQF_IRQPOLL | IRQF_PERCPU, - .handler = timer_interrupt, - .dev_id = &clockevent_bfin, -}; - #if defined(CONFIG_TICKSOURCE_GPTMR0) -static int bfin_timer_set_next_event(unsigned long cycles, +static int bfin_gptmr0_set_next_event(unsigned long cycles, struct clock_event_device *evt) { disable_gptimers(TIMER0bit); @@ -196,7 +156,7 @@ static int bfin_timer_set_next_event(unsigned long cycles, return 0; } -static void bfin_timer_set_mode(enum clock_event_mode mode, +static void bfin_gptmr0_set_mode(enum clock_event_mode mode, struct clock_event_device *evt) { switch (mode) { @@ -224,25 +184,65 @@ static void bfin_timer_set_mode(enum clock_event_mode mode, } } -static void bfin_timer_ack(void) +static void bfin_gptmr0_ack(void) { set_gptimer_status(TIMER_GROUP1, TIMER_STATUS_TIMIL0); } -static void __init bfin_timer_init(void) +static void __init bfin_gptmr0_init(void) { disable_gptimers(TIMER0bit); } -static unsigned long __init bfin_clockevent_check(void) +#ifdef CONFIG_CORE_TIMER_IRQ_L1 +__attribute__((l1_text)) +#endif +irqreturn_t bfin_gptmr0_interrupt(int irq, void *dev_id) { - setup_irq(IRQ_TIMER0, &bfin_timer_irq); - return get_sclk(); + struct clock_event_device *evt = dev_id; + smp_mb(); + evt->event_handler(evt); + bfin_gptmr0_ack(); + return IRQ_HANDLED; } -#else /* CONFIG_TICKSOURCE_CORETMR */ +static struct irqaction gptmr0_irq = { + .name = "Blackfin GPTimer0", + .flags = IRQF_DISABLED | IRQF_TIMER | \ + IRQF_IRQPOLL | IRQF_PERCPU, + .handler = bfin_gptmr0_interrupt, +}; -static int bfin_timer_set_next_event(unsigned long cycles, +static struct clock_event_device clockevent_gptmr0 = { + .name = "bfin_gptimer0", + .rating = 300, + .irq = IRQ_TIMER0, + .shift = 32, + .features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT, + .set_next_event = bfin_gptmr0_set_next_event, + .set_mode = bfin_gptmr0_set_mode, +}; + +static void __init bfin_gptmr0_clockevent_init(struct clock_event_device *evt) +{ + unsigned long clock_tick; + + clock_tick = get_sclk(); + evt->mult = div_sc(clock_tick, NSEC_PER_SEC, evt->shift); + evt->max_delta_ns = clockevent_delta2ns(-1, evt); + evt->min_delta_ns = clockevent_delta2ns(100, evt); + + evt->cpumask = cpumask_of(0); + + clockevents_register_device(evt); +} +#endif /* CONFIG_TICKSOURCE_GPTMR0 */ + +#if defined(CONFIG_TICKSOURCE_CORETMR) +/* per-cpu local core timer */ +static DEFINE_PER_CPU(struct clock_event_device, coretmr_events); + +static int bfin_coretmr_set_next_event(unsigned long cycles, struct clock_event_device *evt) { bfin_write_TCNTL(TMPWR); @@ -253,7 +253,7 @@ static int bfin_timer_set_next_event(unsigned long cycles, return 0; } -static void bfin_timer_set_mode(enum clock_event_mode mode, +static void bfin_coretmr_set_mode(enum clock_event_mode mode, struct clock_event_device *evt) { switch (mode) { @@ -285,19 +285,13 @@ static void bfin_timer_set_mode(enum clock_event_mode mode, } } -static void bfin_timer_ack(void) -{ -} - -static void __init bfin_timer_init(void) +void bfin_coretmr_init(void) { /* power up the timer, but don't enable it just yet */ bfin_write_TCNTL(TMPWR); CSYNC(); - /* - * the TSCALE prescaler counter. - */ + /* the TSCALE prescaler counter. */ bfin_write_TSCALE(TIME_SCALE - 1); bfin_write_TPERIOD(0); bfin_write_TCOUNT(0); @@ -305,48 +299,51 @@ static void __init bfin_timer_init(void) CSYNC(); } -static unsigned long __init bfin_clockevent_check(void) -{ - setup_irq(IRQ_CORETMR, &bfin_timer_irq); - return get_cclk() / TIME_SCALE; -} - -void __init setup_core_timer(void) +#ifdef CONFIG_CORE_TIMER_IRQ_L1 +__attribute__((l1_text)) +#endif +irqreturn_t bfin_coretmr_interrupt(int irq, void *dev_id) { - bfin_timer_init(); - bfin_timer_set_mode(CLOCK_EVT_MODE_PERIODIC, NULL); -} -#endif /* CONFIG_TICKSOURCE_GPTMR0 */ + int cpu = smp_processor_id(); + struct clock_event_device *evt = &per_cpu(coretmr_events, cpu); -/* - * timer_interrupt() needs to keep up the real-time clock, - * as well as call the "do_timer()" routine every clocktick - */ -irqreturn_t timer_interrupt(int irq, void *dev_id) -{ - struct clock_event_device *evt = dev_id; smp_mb(); evt->event_handler(evt); - bfin_timer_ack(); return IRQ_HANDLED; } -static int __init bfin_clockevent_init(void) -{ - unsigned long timer_clk; - - timer_clk = bfin_clockevent_check(); - - bfin_timer_init(); - - clockevent_bfin.mult = div_sc(timer_clk, NSEC_PER_SEC, clockevent_bfin.shift); - clockevent_bfin.max_delta_ns = clockevent_delta2ns(-1, &clockevent_bfin); - clockevent_bfin.min_delta_ns = clockevent_delta2ns(100, &clockevent_bfin); - clockevent_bfin.cpumask = cpumask_of(0); - clockevents_register_device(&clockevent_bfin); +static struct irqaction coretmr_irq = { + .name = "Blackfin CoreTimer", + .flags = IRQF_DISABLED | IRQF_TIMER | \ + IRQF_IRQPOLL | IRQF_PERCPU, + .handler = bfin_coretmr_interrupt, +}; - return 0; +void bfin_coretmr_clockevent_init(void) +{ + unsigned long clock_tick; + unsigned int cpu = smp_processor_id(); + struct clock_event_device *evt = &per_cpu(coretmr_events, cpu); + + evt->name = "bfin_core_timer"; + evt->rating = 350; + evt->irq = -1; + evt->shift = 32; + evt->features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT; + evt->set_next_event = bfin_coretmr_set_next_event; + evt->set_mode = bfin_coretmr_set_mode; + + clock_tick = get_cclk() / TIME_SCALE; + evt->mult = div_sc(clock_tick, NSEC_PER_SEC, evt->shift); + evt->max_delta_ns = clockevent_delta2ns(-1, evt); + evt->min_delta_ns = clockevent_delta2ns(100, evt); + + evt->cpumask = cpumask_of(cpu); + + clockevents_register_device(evt); } +#endif /* CONFIG_TICKSOURCE_CORETMR */ + void __init time_init(void) { @@ -370,5 +367,21 @@ void __init time_init(void) bfin_cs_cycles_init(); bfin_cs_gptimer0_init(); - bfin_clockevent_init(); + +#if defined(CONFIG_TICKSOURCE_CORETMR) + bfin_coretmr_init(); + setup_irq(IRQ_CORETMR, &coretmr_irq); + bfin_coretmr_clockevent_init(); +#endif + +#if defined(CONFIG_TICKSOURCE_GPTMR0) + bfin_gptmr0_init(); + setup_irq(IRQ_TIMER0, &gptmr0_irq); + gptmr0_irq.dev_id = &clockevent_gptmr0; + bfin_gptmr0_clockevent_init(&clockevent_gptmr0); +#endif + +#if !defined(CONFIG_TICKSOURCE_CORETMR) && !defined(CONFIG_TICKSOURCE_GPTMR0) +# error at least one clock event device is required +#endif } diff --git a/arch/blackfin/mach-bf561/include/mach/smp.h b/arch/blackfin/mach-bf561/include/mach/smp.h index 390c7f4ae7b..2c8c514dd38 100644 --- a/arch/blackfin/mach-bf561/include/mach/smp.h +++ b/arch/blackfin/mach-bf561/include/mach/smp.h @@ -25,4 +25,6 @@ void platform_send_ipi_cpu(unsigned int cpu); void platform_clear_ipi(unsigned int cpu); +void bfin_local_timer_setup(void); + #endif /* !_MACH_BF561_SMP */ diff --git a/arch/blackfin/mach-bf561/smp.c b/arch/blackfin/mach-bf561/smp.c index ec93f3ef8fa..90369429ee6 100644 --- a/arch/blackfin/mach-bf561/smp.c +++ b/arch/blackfin/mach-bf561/smp.c @@ -11,6 +11,7 @@ #include <linux/delay.h> #include <asm/smp.h> #include <asm/dma.h> +#include <asm/time.h> static DEFINE_SPINLOCK(boot_lock); @@ -144,3 +145,20 @@ void platform_clear_ipi(unsigned int cpu) bfin_write_SICB_SYSCR(bfin_read_SICB_SYSCR() | (1 << (10 + cpu))); SSYNC(); } + +/* + * Setup core B's local core timer. + * In SMP, core timer is used for clock event device. + */ +void __cpuinit bfin_local_timer_setup(void) +{ +#if defined(CONFIG_TICKSOURCE_CORETMR) + bfin_coretmr_init(); + bfin_coretmr_clockevent_init(); + get_irq_chip(IRQ_CORETMR)->unmask(IRQ_CORETMR); +#else + /* Power down the core timer, just to play safe. */ + bfin_write_TCNTL(0); +#endif + +} diff --git a/arch/blackfin/mach-common/ints-priority.c b/arch/blackfin/mach-common/ints-priority.c index a5d243409d2..efbdb6a1941 100644 --- a/arch/blackfin/mach-common/ints-priority.c +++ b/arch/blackfin/mach-common/ints-priority.c @@ -1073,9 +1073,6 @@ int __init init_arch_irq(void) #endif #ifdef CONFIG_SMP -#ifdef CONFIG_TICKSOURCE_GPTMR0 - case IRQ_TIMER0: -#endif #ifdef CONFIG_TICKSOURCE_CORETMR case IRQ_CORETMR: #endif diff --git a/arch/blackfin/mach-common/smp.c b/arch/blackfin/mach-common/smp.c index eddb720c718..b343ab3764a 100644 --- a/arch/blackfin/mach-common/smp.c +++ b/arch/blackfin/mach-common/smp.c @@ -365,9 +365,6 @@ int __cpuinit __cpu_up(unsigned int cpu) static void __cpuinit setup_secondary(unsigned int cpu) { -#if !defined(CONFIG_TICKSOURCE_GPTMR0) - struct irq_desc *timer_desc; -#endif unsigned long ilat; bfin_write_IMASK(0); @@ -382,17 +379,6 @@ static void __cpuinit setup_secondary(unsigned int cpu) bfin_irq_flags |= IMASK_IVG15 | IMASK_IVG14 | IMASK_IVG13 | IMASK_IVG12 | IMASK_IVG11 | IMASK_IVG10 | IMASK_IVG9 | IMASK_IVG8 | IMASK_IVG7 | IMASK_IVGHW; - -#if defined(CONFIG_TICKSOURCE_GPTMR0) - /* Power down the core timer, just to play safe. */ - bfin_write_TCNTL(0); - - /* system timer0 has been setup by CoreA. */ -#else - timer_desc = irq_desc + IRQ_CORETMR; - setup_core_timer(); - timer_desc->chip->enable(IRQ_CORETMR); -#endif } void __cpuinit secondary_start_kernel(void) @@ -435,6 +421,9 @@ void __cpuinit secondary_start_kernel(void) platform_secondary_init(cpu); + /* setup local core timer */ + bfin_local_timer_setup(); + local_irq_enable(); /* |