diff options
| -rw-r--r-- | arch/mips/Kconfig | 13 | ||||
| -rw-r--r-- | arch/mips/include/asm/time.h | 2 | ||||
| -rw-r--r-- | arch/mips/kernel/Makefile | 1 | ||||
| -rw-r--r-- | arch/mips/kernel/cevt-gic.c | 103 | ||||
| -rw-r--r-- | drivers/clocksource/mips-gic-timer.c | 90 | ||||
| -rw-r--r-- | drivers/irqchip/irq-mips-gic.c | 2 |
6 files changed, 92 insertions, 119 deletions
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index 5b690cf0fec..97bbb3b09d4 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -935,10 +935,6 @@ config CEVT_GT641XX config CEVT_R4K bool -config CEVT_GIC - select MIPS_CM - bool - config CEVT_SB1250 bool @@ -1911,15 +1907,6 @@ config FORCE_MAX_ZONEORDER The page size is not necessarily 4KB. Keep this in mind when choosing a value for this option. -config CEVT_GIC - bool "Use GIC global counter for clock events" - depends on MIPS_GIC && !MIPS_SEAD3 - help - Use the GIC global counter for the clock events. The R4K clock - event driver is always present, so if the platform ends up not - detecting a GIC, it will fall back to the R4K timer for the - generation of clock events. - config BOARD_SCACHE bool diff --git a/arch/mips/include/asm/time.h b/arch/mips/include/asm/time.h index 7969933ba89..5f30aabbb59 100644 --- a/arch/mips/include/asm/time.h +++ b/arch/mips/include/asm/time.h @@ -57,7 +57,7 @@ extern int gic_clockevent_init(void); static inline int mips_clockevent_init(void) { -#if defined(CONFIG_CEVT_GIC) +#if defined(CONFIG_CLKSRC_MIPS_GIC) return (gic_clockevent_init() | r4k_clockevent_init()); #elif defined(CONFIG_CEVT_R4K) return r4k_clockevent_init(); diff --git a/arch/mips/kernel/Makefile b/arch/mips/kernel/Makefile index 1aedbf5e423..92987d1bbe5 100644 --- a/arch/mips/kernel/Makefile +++ b/arch/mips/kernel/Makefile @@ -19,7 +19,6 @@ endif obj-$(CONFIG_CEVT_BCM1480) += cevt-bcm1480.o obj-$(CONFIG_CEVT_R4K) += cevt-r4k.o obj-$(CONFIG_CEVT_DS1287) += cevt-ds1287.o -obj-$(CONFIG_CEVT_GIC) += cevt-gic.o obj-$(CONFIG_CEVT_GT641XX) += cevt-gt641xx.o obj-$(CONFIG_CEVT_SB1250) += cevt-sb1250.o obj-$(CONFIG_CEVT_TXX9) += cevt-txx9.o diff --git a/arch/mips/kernel/cevt-gic.c b/arch/mips/kernel/cevt-gic.c deleted file mode 100644 index 9caa68a2bcd..00000000000 --- a/arch/mips/kernel/cevt-gic.c +++ /dev/null @@ -1,103 +0,0 @@ -/* - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file "COPYING" in the main directory of this archive - * for more details. - * - * Copyright (C) 2013 Imagination Technologies Ltd. - */ -#include <linux/clockchips.h> -#include <linux/interrupt.h> -#include <linux/percpu.h> -#include <linux/smp.h> -#include <linux/irq.h> -#include <linux/irqchip/mips-gic.h> - -#include <asm/time.h> -#include <asm/mips-boards/maltaint.h> - -DEFINE_PER_CPU(struct clock_event_device, gic_clockevent_device); -int gic_timer_irq_installed; - - -static int gic_next_event(unsigned long delta, struct clock_event_device *evt) -{ - u64 cnt; - int res; - - cnt = gic_read_count(); - cnt += (u64)delta; - gic_write_cpu_compare(cnt, cpumask_first(evt->cpumask)); - res = ((int)(gic_read_count() - cnt) >= 0) ? -ETIME : 0; - return res; -} - -void gic_set_clock_mode(enum clock_event_mode mode, - struct clock_event_device *evt) -{ - /* Nothing to do ... */ -} - -irqreturn_t gic_compare_interrupt(int irq, void *dev_id) -{ - struct clock_event_device *cd; - int cpu = smp_processor_id(); - - gic_write_compare(gic_read_compare()); - cd = &per_cpu(gic_clockevent_device, cpu); - cd->event_handler(cd); - return IRQ_HANDLED; -} - -struct irqaction gic_compare_irqaction = { - .handler = gic_compare_interrupt, - .flags = IRQF_PERCPU | IRQF_TIMER, - .name = "timer", -}; - - -void gic_event_handler(struct clock_event_device *dev) -{ -} - -int gic_clockevent_init(void) -{ - unsigned int cpu = smp_processor_id(); - struct clock_event_device *cd; - unsigned int irq; - - if (!cpu_has_counter || !gic_frequency) - return -ENXIO; - - irq = MIPS_GIC_IRQ_BASE + GIC_LOCAL_TO_HWIRQ(GIC_LOCAL_INT_COMPARE); - - cd = &per_cpu(gic_clockevent_device, cpu); - - cd->name = "MIPS GIC"; - cd->features = CLOCK_EVT_FEAT_ONESHOT | - CLOCK_EVT_FEAT_C3STOP; - - clockevent_set_clock(cd, gic_frequency); - - /* Calculate the min / max delta */ - cd->max_delta_ns = clockevent_delta2ns(0x7fffffff, cd); - cd->min_delta_ns = clockevent_delta2ns(0x300, cd); - - cd->rating = 300; - cd->irq = irq; - cd->cpumask = cpumask_of(cpu); - cd->set_next_event = gic_next_event; - cd->set_mode = gic_set_clock_mode; - cd->event_handler = gic_event_handler; - - clockevents_register_device(cd); - - if (!gic_timer_irq_installed) { - setup_percpu_irq(irq, &gic_compare_irqaction); - gic_timer_irq_installed = 1; - } - - enable_percpu_irq(irq, IRQ_TYPE_NONE); - - - return 0; -} diff --git a/drivers/clocksource/mips-gic-timer.c b/drivers/clocksource/mips-gic-timer.c index 0bf28e6aca7..3cf5912c405 100644 --- a/drivers/clocksource/mips-gic-timer.c +++ b/drivers/clocksource/mips-gic-timer.c @@ -5,10 +5,100 @@ * * Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved. */ +#include <linux/clockchips.h> #include <linux/init.h> +#include <linux/interrupt.h> #include <linux/irqchip/mips-gic.h> +#include <linux/percpu.h> +#include <linux/smp.h> #include <linux/time.h> +#include <asm/time.h> + +DEFINE_PER_CPU(struct clock_event_device, gic_clockevent_device); +int gic_timer_irq_installed; + +static int gic_next_event(unsigned long delta, struct clock_event_device *evt) +{ + u64 cnt; + int res; + + cnt = gic_read_count(); + cnt += (u64)delta; + gic_write_cpu_compare(cnt, cpumask_first(evt->cpumask)); + res = ((int)(gic_read_count() - cnt) >= 0) ? -ETIME : 0; + return res; +} + +void gic_set_clock_mode(enum clock_event_mode mode, + struct clock_event_device *evt) +{ + /* Nothing to do ... */ +} + +irqreturn_t gic_compare_interrupt(int irq, void *dev_id) +{ + struct clock_event_device *cd; + int cpu = smp_processor_id(); + + gic_write_compare(gic_read_compare()); + cd = &per_cpu(gic_clockevent_device, cpu); + cd->event_handler(cd); + return IRQ_HANDLED; +} + +struct irqaction gic_compare_irqaction = { + .handler = gic_compare_interrupt, + .flags = IRQF_PERCPU | IRQF_TIMER, + .name = "timer", +}; + +void gic_event_handler(struct clock_event_device *dev) +{ +} + +int gic_clockevent_init(void) +{ + unsigned int cpu = smp_processor_id(); + struct clock_event_device *cd; + unsigned int irq; + + if (!cpu_has_counter || !gic_frequency) + return -ENXIO; + + irq = MIPS_GIC_IRQ_BASE + GIC_LOCAL_TO_HWIRQ(GIC_LOCAL_INT_COMPARE); + + cd = &per_cpu(gic_clockevent_device, cpu); + + cd->name = "MIPS GIC"; + cd->features = CLOCK_EVT_FEAT_ONESHOT | + CLOCK_EVT_FEAT_C3STOP; + + clockevent_set_clock(cd, gic_frequency); + + /* Calculate the min / max delta */ + cd->max_delta_ns = clockevent_delta2ns(0x7fffffff, cd); + cd->min_delta_ns = clockevent_delta2ns(0x300, cd); + + cd->rating = 300; + cd->irq = irq; + cd->cpumask = cpumask_of(cpu); + cd->set_next_event = gic_next_event; + cd->set_mode = gic_set_clock_mode; + cd->event_handler = gic_event_handler; + + clockevents_register_device(cd); + + if (!gic_timer_irq_installed) { + setup_percpu_irq(irq, &gic_compare_irqaction); + gic_timer_irq_installed = 1; + } + + enable_percpu_irq(irq, IRQ_TYPE_NONE); + + return 0; +} + static cycle_t gic_hpt_read(struct clocksource *cs) { return gic_read_count(); diff --git a/drivers/irqchip/irq-mips-gic.c b/drivers/irqchip/irq-mips-gic.c index 035d5ad435f..cb674696810 100644 --- a/drivers/irqchip/irq-mips-gic.c +++ b/drivers/irqchip/irq-mips-gic.c @@ -103,7 +103,7 @@ static inline void gic_map_to_vpe(unsigned int intr, unsigned int vpe) GIC_SH_MAP_TO_VPE_REG_BIT(vpe)); } -#if defined(CONFIG_CLKSRC_MIPS_GIC) || defined(CONFIG_CEVT_GIC) +#ifdef CONFIG_CLKSRC_MIPS_GIC cycle_t gic_read_count(void) { unsigned int hi, hi2, lo; |