diff options
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/oprofile/Kconfig | 6 | ||||
| -rw-r--r-- | arch/arm/oprofile/Makefile | 1 | ||||
| -rw-r--r-- | arch/arm/oprofile/common.c | 4 | ||||
| -rw-r--r-- | arch/arm/oprofile/op_arm_model.h | 1 | ||||
| -rw-r--r-- | arch/arm/oprofile/op_model_mpcore.c | 296 | ||||
| -rw-r--r-- | arch/arm/oprofile/op_model_mpcore.h | 61 |
6 files changed, 369 insertions, 0 deletions
diff --git a/arch/arm/oprofile/Kconfig b/arch/arm/oprofile/Kconfig index 40cc189..afd93ad 100644 --- a/arch/arm/oprofile/Kconfig +++ b/arch/arm/oprofile/Kconfig @@ -27,6 +27,12 @@ config OPROFILE_ARMV6 default y select OPROFILE_ARM11_CORE +config OPROFILE_MPCORE + bool + depends on CPU_V6 && SMP + default y + select OPROFILE_ARM11_CORE + config OPROFILE_ARM11_CORE bool diff --git a/arch/arm/oprofile/Makefile b/arch/arm/oprofile/Makefile index 3d5ff30..e61d0cc 100644 --- a/arch/arm/oprofile/Makefile +++ b/arch/arm/oprofile/Makefile @@ -10,3 +10,4 @@ oprofile-y := $(DRIVER_OBJS) common.o backtrace.o oprofile-$(CONFIG_CPU_XSCALE) += op_model_xscale.o oprofile-$(CONFIG_OPROFILE_ARM11_CORE) += op_model_arm11_core.o oprofile-$(CONFIG_OPROFILE_ARMV6) += op_model_v6.o +oprofile-$(CONFIG_OPROFILE_MPCORE) += op_model_mpcore.o diff --git a/arch/arm/oprofile/common.c b/arch/arm/oprofile/common.c index f1b24fb..0a007b93 100644 --- a/arch/arm/oprofile/common.c +++ b/arch/arm/oprofile/common.c @@ -139,6 +139,10 @@ int __init oprofile_arch_init(struct oprofile_operations *ops) spec = &op_armv6_spec; #endif +#ifdef CONFIG_OPROFILE_MPCORE + spec = &op_mpcore_spec; +#endif + if (spec) { ret = spec->init(); if (ret < 0) diff --git a/arch/arm/oprofile/op_arm_model.h b/arch/arm/oprofile/op_arm_model.h index ad1c962..4899c62 100644 --- a/arch/arm/oprofile/op_arm_model.h +++ b/arch/arm/oprofile/op_arm_model.h @@ -25,6 +25,7 @@ extern struct op_arm_model_spec op_xscale_spec; #endif extern struct op_arm_model_spec op_armv6_spec; +extern struct op_arm_model_spec op_mpcore_spec; extern void arm_backtrace(struct pt_regs * const regs, unsigned int depth); diff --git a/arch/arm/oprofile/op_model_mpcore.c b/arch/arm/oprofile/op_model_mpcore.c new file mode 100644 index 0000000..8985007 --- /dev/null +++ b/arch/arm/oprofile/op_model_mpcore.c @@ -0,0 +1,296 @@ +/** + * @file op_model_mpcore.c + * MPCORE Event Monitor Driver + * @remark Copyright 2004 ARM SMP Development Team + * @remark Copyright 2000-2004 Deepak Saxena <dsaxena@mvista.com> + * @remark Copyright 2000-2004 MontaVista Software Inc + * @remark Copyright 2004 Dave Jiang <dave.jiang@intel.com> + * @remark Copyright 2004 Intel Corporation + * @remark Copyright 2004 Zwane Mwaikambo <zwane@arm.linux.org.uk> + * @remark Copyright 2004 Oprofile Authors + * + * @remark Read the file COPYING + * + * @author Zwane Mwaikambo + * + * Counters: + * 0: PMN0 on CPU0, per-cpu configurable event counter + * 1: PMN1 on CPU0, per-cpu configurable event counter + * 2: CCNT on CPU0 + * 3: PMN0 on CPU1 + * 4: PMN1 on CPU1 + * 5: CCNT on CPU1 + * 6: PMN0 on CPU1 + * 7: PMN1 on CPU1 + * 8: CCNT on CPU1 + * 9: PMN0 on CPU1 + * 10: PMN1 on CPU1 + * 11: CCNT on CPU1 + * 12-19: configurable SCU event counters + */ + +/* #define DEBUG */ +#include <linux/types.h> +#include <linux/errno.h> +#include <linux/sched.h> +#include <linux/oprofile.h> +#include <linux/interrupt.h> +#include <linux/smp.h> + +#include <asm/io.h> +#include <asm/irq.h> +#include <asm/mach/irq.h> +#include <asm/hardware.h> +#include <asm/system.h> + +#include "op_counter.h" +#include "op_arm_model.h" +#include "op_model_arm11_core.h" +#include "op_model_mpcore.h" + +/* + * MPCore SCU event monitor support + */ +#define SCU_EVENTMONITORS_VA_BASE __io_address(REALVIEW_MPCORE_SCU_BASE + 0x10) + +/* + * Bitmask of used SCU counters + */ +static unsigned int scu_em_used; + +/* + * 2 helper fns take a counter number from 0-7 (not the userspace-visible counter number) + */ +static inline void scu_reset_counter(struct eventmonitor __iomem *emc, unsigned int n) +{ + writel(-(u32)counter_config[SCU_COUNTER(n)].count, &emc->MC[n]); +} + +static inline void scu_set_event(struct eventmonitor __iomem *emc, unsigned int n, u32 event) +{ + event &= 0xff; + writeb(event, &emc->MCEB[n]); +} + +/* + * SCU counters' IRQ handler (one IRQ per counter => 2 IRQs per CPU) + */ +static irqreturn_t scu_em_interrupt(int irq, void *arg) +{ + struct eventmonitor __iomem *emc = SCU_EVENTMONITORS_VA_BASE; + unsigned int cnt; + + cnt = irq - IRQ_PMU_SCU0; + oprofile_add_sample(get_irq_regs(), SCU_COUNTER(cnt)); + scu_reset_counter(emc, cnt); + + /* Clear overflow flag for this counter */ + writel(1 << (cnt + 16), &emc->PMCR); + + return IRQ_HANDLED; +} + +/* Configure just the SCU counters that the user has requested */ +static void scu_setup(void) +{ + struct eventmonitor __iomem *emc = SCU_EVENTMONITORS_VA_BASE; + unsigned int i; + + scu_em_used = 0; + + for (i = 0; i < NUM_SCU_COUNTERS; i++) { + if (counter_config[SCU_COUNTER(i)].enabled && + counter_config[SCU_COUNTER(i)].event) { + scu_set_event(emc, i, 0); /* disable counter for now */ + scu_em_used |= 1 << i; + } + } +} + +static int scu_start(void) +{ + struct eventmonitor __iomem *emc = SCU_EVENTMONITORS_VA_BASE; + unsigned int temp, i; + unsigned long event; + int ret = 0; + + /* + * request the SCU counter interrupts that we need + */ + for (i = 0; i < NUM_SCU_COUNTERS; i++) { + if (scu_em_used & (1 << i)) { + ret = request_irq(IRQ_PMU_SCU0 + i, scu_em_interrupt, IRQF_DISABLED, "SCU PMU", NULL); + if (ret) { + printk(KERN_ERR "oprofile: unable to request IRQ%u for SCU Event Monitor\n", + IRQ_PMU_SCU0 + i); + goto err_free_scu; + } + } + } + + /* + * clear overflow and enable interrupt for all used counters + */ + temp = readl(&emc->PMCR); + for (i = 0; i < NUM_SCU_COUNTERS; i++) { + if (scu_em_used & (1 << i)) { + scu_reset_counter(emc, i); + event = counter_config[SCU_COUNTER(i)].event; + scu_set_event(emc, i, event); + + /* clear overflow/interrupt */ + temp |= 1 << (i + 16); + /* enable interrupt*/ + temp |= 1 << (i + 8); + } + } + + /* Enable all 8 counters */ + temp |= PMCR_E; + writel(temp, &emc->PMCR); + + return 0; + + err_free_scu: + while (i--) + free_irq(IRQ_PMU_SCU0 + i, NULL); + return ret; +} + +static void scu_stop(void) +{ + struct eventmonitor __iomem *emc = SCU_EVENTMONITORS_VA_BASE; + unsigned int temp, i; + + /* Disable counter interrupts */ + /* Don't disable all 8 counters (with the E bit) as they may be in use */ + temp = readl(&emc->PMCR); + for (i = 0; i < NUM_SCU_COUNTERS; i++) { + if (scu_em_used & (1 << i)) + temp &= ~(1 << (i + 8)); + } + writel(temp, &emc->PMCR); + + /* Free counter interrupts and reset counters */ + for (i = 0; i < NUM_SCU_COUNTERS; i++) { + if (scu_em_used & (1 << i)) { + scu_reset_counter(emc, i); + free_irq(IRQ_PMU_SCU0 + i, NULL); + } + } +} + +struct em_function_data { + int (*fn)(void); + int ret; +}; + +static void em_func(void *data) +{ + struct em_function_data *d = data; + int ret = d->fn(); + if (ret) + d->ret = ret; +} + +static int em_call_function(int (*fn)(void)) +{ + struct em_function_data data; + + data.fn = fn; + data.ret = 0; + + smp_call_function(em_func, &data, 1, 1); + em_func(&data); + + return data.ret; +} + +/* + * Glue to stick the individual ARM11 PMUs and the SCU + * into the oprofile framework. + */ +static int em_setup_ctrs(void) +{ + int ret; + + /* Configure CPU counters by cross-calling to the other CPUs */ + ret = em_call_function(arm11_setup_pmu); + if (ret == 0) + scu_setup(); + + return 0; +} + +static int arm11_irqs[] = { + [0] = IRQ_PMU_CPU0, + [1] = IRQ_PMU_CPU1, + [2] = IRQ_PMU_CPU2, + [3] = IRQ_PMU_CPU3 +}; + +static int em_start(void) +{ + int ret; + + ret = arm11_request_interrupts(arm11_irqs, ARRAY_SIZE(arm11_irqs)); + if (ret == 0) { + em_call_function(arm11_start_pmu); + + ret = scu_start(); + if (ret) + arm11_release_interrupts(arm11_irqs, ARRAY_SIZE(arm11_irqs)); + } + return ret; +} + +static void em_stop(void) +{ + em_call_function(arm11_stop_pmu); + arm11_release_interrupts(arm11_irqs, ARRAY_SIZE(arm11_irqs)); + scu_stop(); +} + +/* + * Why isn't there a function to route an IRQ to a specific CPU in + * genirq? + */ +static void em_route_irq(int irq, unsigned int cpu) +{ + irq_desc[irq].affinity = cpumask_of_cpu(cpu); + irq_desc[irq].chip->set_affinity(irq, cpumask_of_cpu(cpu)); +} + +static int em_setup(void) +{ + /* + * Send SCU PMU interrupts to the "owner" CPU. + */ + em_route_irq(IRQ_PMU_SCU0, 0); + em_route_irq(IRQ_PMU_SCU1, 0); + em_route_irq(IRQ_PMU_SCU2, 1); + em_route_irq(IRQ_PMU_SCU3, 1); + em_route_irq(IRQ_PMU_SCU4, 2); + em_route_irq(IRQ_PMU_SCU5, 2); + em_route_irq(IRQ_PMU_SCU6, 3); + em_route_irq(IRQ_PMU_SCU7, 3); + + /* + * Send CP15 PMU interrupts to the owner CPU. + */ + em_route_irq(IRQ_PMU_CPU0, 0); + em_route_irq(IRQ_PMU_CPU1, 1); + em_route_irq(IRQ_PMU_CPU2, 2); + em_route_irq(IRQ_PMU_CPU3, 3); + + return 0; +} + +struct op_arm_model_spec op_mpcore_spec = { + .init = em_setup, + .num_counters = MPCORE_NUM_COUNTERS, + .setup_ctrs = em_setup_ctrs, + .start = em_start, + .stop = em_stop, + .name = "arm/mpcore", +}; diff --git a/arch/arm/oprofile/op_model_mpcore.h b/arch/arm/oprofile/op_model_mpcore.h new file mode 100644 index 0000000..73d8110 --- /dev/null +++ b/arch/arm/oprofile/op_model_mpcore.h @@ -0,0 +1,61 @@ +/** + * @file op_model_mpcore.c + * MPCORE Event Monitor Driver + * @remark Copyright 2004 ARM SMP Development Team + * @remark Copyright 2000-2004 Deepak Saxena <dsaxena@mvista.com> + * @remark Copyright 2000-2004 MontaVista Software Inc + * @remark Copyright 2004 Dave Jiang <dave.jiang@intel.com> + * @remark Copyright 2004 Intel Corporation + * @remark Copyright 2004 Zwane Mwaikambo <zwane@arm.linux.org.uk> + * @remark Copyright 2004 Oprofile Authors + * + * @remark Read the file COPYING + * + * @author Zwane Mwaikambo + */ +#ifndef OP_MODEL_MPCORE_H +#define OP_MODEL_MPCORE_H + +struct eventmonitor { + unsigned long PMCR; + unsigned char MCEB[8]; + unsigned long MC[8]; +}; + +/* + * List of userspace counter numbers: note that the structure is important. + * The code relies on CPUn's counters being CPU0's counters + 3n + * and on CPU0's counters starting at 0 + */ + +#define COUNTER_CPU0_PMN0 0 +#define COUNTER_CPU0_PMN1 1 +#define COUNTER_CPU0_CCNT 2 + +#define COUNTER_CPU1_PMN0 3 +#define COUNTER_CPU1_PMN1 4 +#define COUNTER_CPU1_CCNT 5 + +#define COUNTER_CPU2_PMN0 6 +#define COUNTER_CPU2_PMN1 7 +#define COUNTER_CPU2_CCNT 8 + +#define COUNTER_CPU3_PMN0 9 +#define COUNTER_CPU3_PMN1 10 +#define COUNTER_CPU3_CCNT 11 + +#define COUNTER_SCU_MN0 12 +#define COUNTER_SCU_MN1 13 +#define COUNTER_SCU_MN2 14 +#define COUNTER_SCU_MN3 15 +#define COUNTER_SCU_MN4 16 +#define COUNTER_SCU_MN5 17 +#define COUNTER_SCU_MN6 18 +#define COUNTER_SCU_MN7 19 +#define NUM_SCU_COUNTERS 8 + +#define SCU_COUNTER(number) ((number) + COUNTER_SCU_MN0) + +#define MPCORE_NUM_COUNTERS SCU_COUNTER(NUM_SCU_COUNTERS) + +#endif |
