diff options
| author | Jamie Iles <jamie.iles@picochip.com> | 2010-02-02 20:24:07 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2010-02-12 17:23:43 +0000 |
| commit | 1618fdd9602c689de2f820a88cb3e283a39c3d90 (patch) | |
| tree | be2cec6548d61dc83b7fc538fa929533f9cb9112 /arch/arm/oprofile/op_model_v7.c | |
| parent | 0f4f0672ac950c96cffaf84a666d35e817d7c3ca (diff) | |
ARM: 5901/2: arm/oprofile: reserve the PMU when starting
Make sure that we have access to the performance counters and
that they aren't being used by perf events or anything else.
Cc: Will Deacon <will.deacon@arm.com>
Cc: Jean Pihet <jpihet@mvista.com>
Signed-off-by: Jamie Iles <jamie.iles@picochip.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/oprofile/op_model_v7.c')
| -rw-r--r-- | arch/arm/oprofile/op_model_v7.c | 30 |
1 files changed, 19 insertions, 11 deletions
diff --git a/arch/arm/oprofile/op_model_v7.c b/arch/arm/oprofile/op_model_v7.c index 2088a6c0cc0..8642d0891ae 100644 --- a/arch/arm/oprofile/op_model_v7.c +++ b/arch/arm/oprofile/op_model_v7.c @@ -11,11 +11,14 @@ */ #include <linux/types.h> #include <linux/errno.h> +#include <linux/err.h> #include <linux/oprofile.h> #include <linux/interrupt.h> #include <linux/irq.h> #include <linux/smp.h> +#include <asm/pmu.h> + #include "op_counter.h" #include "op_arm_model.h" #include "op_model_v7.h" @@ -295,7 +298,7 @@ static irqreturn_t armv7_pmnc_interrupt(int irq, void *arg) return IRQ_HANDLED; } -int armv7_request_interrupts(int *irqs, int nr) +int armv7_request_interrupts(const int *irqs, int nr) { unsigned int i; int ret = 0; @@ -318,7 +321,7 @@ int armv7_request_interrupts(int *irqs, int nr) return ret; } -void armv7_release_interrupts(int *irqs, int nr) +void armv7_release_interrupts(const int *irqs, int nr) { unsigned int i; @@ -362,12 +365,7 @@ static void armv7_pmnc_dump_regs(void) } #endif - -static int irqs[] = { -#ifdef CONFIG_ARCH_OMAP3 - INT_34XX_BENCH_MPU_EMUL, -#endif -}; +static const struct pmu_irqs *pmu_irqs; static void armv7_pmnc_stop(void) { @@ -375,19 +373,29 @@ static void armv7_pmnc_stop(void) armv7_pmnc_dump_regs(); #endif armv7_stop_pmnc(); - armv7_release_interrupts(irqs, ARRAY_SIZE(irqs)); + armv7_release_interrupts(pmu_irqs->irqs, pmu_irqs->num_irqs); + release_pmu(pmu_irqs); + pmu_irqs = NULL; } static int armv7_pmnc_start(void) { int ret; + pmu_irqs = reserve_pmu(); + if (IS_ERR(pmu_irqs)) + return PTR_ERR(pmu_irqs); + #ifdef DEBUG armv7_pmnc_dump_regs(); #endif - ret = armv7_request_interrupts(irqs, ARRAY_SIZE(irqs)); - if (ret >= 0) + ret = armv7_request_interrupts(pmu_irqs->irqs, pmu_irqs->num_irqs); + if (ret >= 0) { armv7_start_pmnc(); + } else { + release_pmu(pmu_irqs); + pmu_irqs = NULL; + } return ret; } |