From fe166148f699cc7865ca07b6754872cfb5ebc312 Mon Sep 17 00:00:00 2001 From: Will Deacon Date: Fri, 30 Apr 2010 11:37:51 +0100 Subject: ARM: 6073/1: oprofile: remove old files and update KConfig Enable hardware perf-events if CPU_HAS_PMU and select HAVE_OPROFILE if HAVE_PERF_EVENTS. If no hardware support is present, OProfile will fall back to timer mode. This patch also removes the old OProfile drivers in favour of the code implemented by perf. Signed-off-by: Will Deacon Signed-off-by: Russell King --- arch/arm/oprofile/Makefile | 7 +- arch/arm/oprofile/backtrace.c | 83 ------ arch/arm/oprofile/op_arm_model.h | 35 --- arch/arm/oprofile/op_counter.h | 27 -- arch/arm/oprofile/op_model_arm11_core.c | 162 ------------ arch/arm/oprofile/op_model_arm11_core.h | 45 ---- arch/arm/oprofile/op_model_mpcore.c | 306 ---------------------- arch/arm/oprofile/op_model_mpcore.h | 61 ----- arch/arm/oprofile/op_model_v6.c | 78 ------ arch/arm/oprofile/op_model_v7.c | 415 ----------------------------- arch/arm/oprofile/op_model_v7.h | 103 -------- arch/arm/oprofile/op_model_xscale.c | 444 -------------------------------- 12 files changed, 1 insertion(+), 1765 deletions(-) delete mode 100644 arch/arm/oprofile/backtrace.c delete mode 100644 arch/arm/oprofile/op_arm_model.h delete mode 100644 arch/arm/oprofile/op_counter.h delete mode 100644 arch/arm/oprofile/op_model_arm11_core.c delete mode 100644 arch/arm/oprofile/op_model_arm11_core.h delete mode 100644 arch/arm/oprofile/op_model_mpcore.c delete mode 100644 arch/arm/oprofile/op_model_mpcore.h delete mode 100644 arch/arm/oprofile/op_model_v6.c delete mode 100644 arch/arm/oprofile/op_model_v7.c delete mode 100644 arch/arm/oprofile/op_model_v7.h delete mode 100644 arch/arm/oprofile/op_model_xscale.c (limited to 'arch/arm/oprofile') diff --git a/arch/arm/oprofile/Makefile b/arch/arm/oprofile/Makefile index 88e31f549f50..e666eafed152 100644 --- a/arch/arm/oprofile/Makefile +++ b/arch/arm/oprofile/Makefile @@ -6,9 +6,4 @@ DRIVER_OBJS = $(addprefix ../../../drivers/oprofile/, \ oprofilefs.o oprofile_stats.o \ timer_int.o ) -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-$(CONFIG_OPROFILE_MPCORE) += op_model_mpcore.o -oprofile-$(CONFIG_OPROFILE_ARMV7) += op_model_v7.o +oprofile-y := $(DRIVER_OBJS) common.o diff --git a/arch/arm/oprofile/backtrace.c b/arch/arm/oprofile/backtrace.c deleted file mode 100644 index d805a52b5032..000000000000 --- a/arch/arm/oprofile/backtrace.c +++ /dev/null @@ -1,83 +0,0 @@ -/* - * Arm specific backtracing code for oprofile - * - * Copyright 2005 Openedhand Ltd. - * - * Author: Richard Purdie - * - * Based on i386 oprofile backtrace code by John Levon, David Smith - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * - */ - -#include -#include -#include -#include -#include -#include - -static int report_trace(struct stackframe *frame, void *d) -{ - unsigned int *depth = d; - - if (*depth) { - oprofile_add_trace(frame->pc); - (*depth)--; - } - - return *depth == 0; -} - -/* - * The registers we're interested in are at the end of the variable - * length saved register structure. The fp points at the end of this - * structure so the address of this struct is: - * (struct frame_tail *)(xxx->fp)-1 - */ -struct frame_tail { - struct frame_tail *fp; - unsigned long sp; - unsigned long lr; -} __attribute__((packed)); - -static struct frame_tail* user_backtrace(struct frame_tail *tail) -{ - struct frame_tail buftail[2]; - - /* Also check accessibility of one struct frame_tail beyond */ - if (!access_ok(VERIFY_READ, tail, sizeof(buftail))) - return NULL; - if (__copy_from_user_inatomic(buftail, tail, sizeof(buftail))) - return NULL; - - oprofile_add_trace(buftail[0].lr); - - /* frame pointers should strictly progress back up the stack - * (towards higher addresses) */ - if (tail >= buftail[0].fp) - return NULL; - - return buftail[0].fp-1; -} - -void arm_backtrace(struct pt_regs * const regs, unsigned int depth) -{ - struct frame_tail *tail = ((struct frame_tail *) regs->ARM_fp) - 1; - - if (!user_mode(regs)) { - struct stackframe frame; - frame.fp = regs->ARM_fp; - frame.sp = regs->ARM_sp; - frame.lr = regs->ARM_lr; - frame.pc = regs->ARM_pc; - walk_stackframe(&frame, report_trace, &depth); - return; - } - - while (depth-- && tail && !((unsigned long) tail & 3)) - tail = user_backtrace(tail); -} diff --git a/arch/arm/oprofile/op_arm_model.h b/arch/arm/oprofile/op_arm_model.h deleted file mode 100644 index 8c4e4f6a1de3..000000000000 --- a/arch/arm/oprofile/op_arm_model.h +++ /dev/null @@ -1,35 +0,0 @@ -/** - * @file op_arm_model.h - * interface to ARM machine specific operations - * - * @remark Copyright 2004 Oprofile Authors - * @remark Read the file COPYING - * - * @author Zwane Mwaikambo - */ - -#ifndef OP_ARM_MODEL_H -#define OP_ARM_MODEL_H - -struct op_arm_model_spec { - int (*init)(void); - unsigned int num_counters; - int (*setup_ctrs)(void); - int (*start)(void); - void (*stop)(void); - char *name; -}; - -#ifdef CONFIG_CPU_XSCALE -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 struct op_arm_model_spec op_armv7_spec; - -extern void arm_backtrace(struct pt_regs * const regs, unsigned int depth); - -extern int __init op_arm_init(struct oprofile_operations *ops, struct op_arm_model_spec *spec); -extern void op_arm_exit(void); -#endif /* OP_ARM_MODEL_H */ diff --git a/arch/arm/oprofile/op_counter.h b/arch/arm/oprofile/op_counter.h deleted file mode 100644 index ca942a63b52f..000000000000 --- a/arch/arm/oprofile/op_counter.h +++ /dev/null @@ -1,27 +0,0 @@ -/** - * @file op_counter.h - * - * @remark Copyright 2004 Oprofile Authors - * @remark Read the file COPYING - * - * @author Zwane Mwaikambo - */ - -#ifndef OP_COUNTER_H -#define OP_COUNTER_H - -/* Per performance monitor configuration as set via - * oprofilefs. - */ -struct op_counter_config { - unsigned long count; - unsigned long enabled; - unsigned long event; - unsigned long unit_mask; - unsigned long kernel; - unsigned long user; -}; - -extern struct op_counter_config *counter_config; - -#endif /* OP_COUNTER_H */ diff --git a/arch/arm/oprofile/op_model_arm11_core.c b/arch/arm/oprofile/op_model_arm11_core.c deleted file mode 100644 index ef3e2653b90c..000000000000 --- a/arch/arm/oprofile/op_model_arm11_core.c +++ /dev/null @@ -1,162 +0,0 @@ -/** - * @file op_model_arm11_core.c - * ARM11 Event Monitor Driver - * @remark Copyright 2004 ARM SMP Development Team - */ -#include -#include -#include -#include -#include -#include - -#include "op_counter.h" -#include "op_arm_model.h" -#include "op_model_arm11_core.h" - -/* - * ARM11 PMU support - */ -static inline void arm11_write_pmnc(u32 val) -{ - /* upper 4bits and 7, 11 are write-as-0 */ - val &= 0x0ffff77f; - asm volatile("mcr p15, 0, %0, c15, c12, 0" : : "r" (val)); -} - -static inline u32 arm11_read_pmnc(void) -{ - u32 val; - asm volatile("mrc p15, 0, %0, c15, c12, 0" : "=r" (val)); - return val; -} - -static void arm11_reset_counter(unsigned int cnt) -{ - u32 val = -(u32)counter_config[CPU_COUNTER(smp_processor_id(), cnt)].count; - switch (cnt) { - case CCNT: - asm volatile("mcr p15, 0, %0, c15, c12, 1" : : "r" (val)); - break; - - case PMN0: - asm volatile("mcr p15, 0, %0, c15, c12, 2" : : "r" (val)); - break; - - case PMN1: - asm volatile("mcr p15, 0, %0, c15, c12, 3" : : "r" (val)); - break; - } -} - -int arm11_setup_pmu(void) -{ - unsigned int cnt; - u32 pmnc; - - if (arm11_read_pmnc() & PMCR_E) { - printk(KERN_ERR "oprofile: CPU%u PMU still enabled when setup new event counter.\n", smp_processor_id()); - return -EBUSY; - } - - /* initialize PMNC, reset overflow, D bit, C bit and P bit. */ - arm11_write_pmnc(PMCR_OFL_PMN0 | PMCR_OFL_PMN1 | PMCR_OFL_CCNT | - PMCR_C | PMCR_P); - - for (pmnc = 0, cnt = PMN0; cnt <= CCNT; cnt++) { - unsigned long event; - - if (!counter_config[CPU_COUNTER(smp_processor_id(), cnt)].enabled) - continue; - - event = counter_config[CPU_COUNTER(smp_processor_id(), cnt)].event & 255; - - /* - * Set event (if destined for PMNx counters) - */ - if (cnt == PMN0) { - pmnc |= event << 20; - } else if (cnt == PMN1) { - pmnc |= event << 12; - } - - /* - * We don't need to set the event if it's a cycle count - * Enable interrupt for this counter - */ - pmnc |= PMCR_IEN_PMN0 << cnt; - arm11_reset_counter(cnt); - } - arm11_write_pmnc(pmnc); - - return 0; -} - -int arm11_start_pmu(void) -{ - arm11_write_pmnc(arm11_read_pmnc() | PMCR_E); - return 0; -} - -int arm11_stop_pmu(void) -{ - unsigned int cnt; - - arm11_write_pmnc(arm11_read_pmnc() & ~PMCR_E); - - for (cnt = PMN0; cnt <= CCNT; cnt++) - arm11_reset_counter(cnt); - - return 0; -} - -/* - * CPU counters' IRQ handler (one IRQ per CPU) - */ -static irqreturn_t arm11_pmu_interrupt(int irq, void *arg) -{ - struct pt_regs *regs = get_irq_regs(); - unsigned int cnt; - u32 pmnc; - - pmnc = arm11_read_pmnc(); - - for (cnt = PMN0; cnt <= CCNT; cnt++) { - if ((pmnc & (PMCR_OFL_PMN0 << cnt)) && (pmnc & (PMCR_IEN_PMN0 << cnt))) { - arm11_reset_counter(cnt); - oprofile_add_sample(regs, CPU_COUNTER(smp_processor_id(), cnt)); - } - } - /* Clear counter flag(s) */ - arm11_write_pmnc(pmnc); - return IRQ_HANDLED; -} - -int arm11_request_interrupts(const int *irqs, int nr) -{ - unsigned int i; - int ret = 0; - - for(i = 0; i < nr; i++) { - ret = request_irq(irqs[i], arm11_pmu_interrupt, IRQF_DISABLED, "CP15 PMU", NULL); - if (ret != 0) { - printk(KERN_ERR "oprofile: unable to request IRQ%u for MPCORE-EM\n", - irqs[i]); - break; - } - } - - if (i != nr) - while (i-- != 0) - free_irq(irqs[i], NULL); - - return ret; -} - -void arm11_release_interrupts(const int *irqs, int nr) -{ - unsigned int i; - - for (i = 0; i < nr; i++) - free_irq(irqs[i], NULL); -} diff --git a/arch/arm/oprofile/op_model_arm11_core.h b/arch/arm/oprofile/op_model_arm11_core.h deleted file mode 100644 index 1902b99d9dfd..000000000000 --- a/arch/arm/oprofile/op_model_arm11_core.h +++ /dev/null @@ -1,45 +0,0 @@ -/** - * @file op_model_arm11_core.h - * ARM11 Event Monitor Driver - * @remark Copyright 2004 ARM SMP Development Team - * @remark Copyright 2000-2004 Deepak Saxena - * @remark Copyright 2000-2004 MontaVista Software Inc - * @remark Copyright 2004 Dave Jiang - * @remark Copyright 2004 Intel Corporation - * @remark Copyright 2004 Zwane Mwaikambo - * @remark Copyright 2004 Oprofile Authors - * - * @remark Read the file COPYING - * - * @author Zwane Mwaikambo - */ -#ifndef OP_MODEL_ARM11_CORE_H -#define OP_MODEL_ARM11_CORE_H - -/* - * Per-CPU PMCR - */ -#define PMCR_E (1 << 0) /* Enable */ -#define PMCR_P (1 << 1) /* Count reset */ -#define PMCR_C (1 << 2) /* Cycle counter reset */ -#define PMCR_D (1 << 3) /* Cycle counter counts every 64th cpu cycle */ -#define PMCR_IEN_PMN0 (1 << 4) /* Interrupt enable count reg 0 */ -#define PMCR_IEN_PMN1 (1 << 5) /* Interrupt enable count reg 1 */ -#define PMCR_IEN_CCNT (1 << 6) /* Interrupt enable cycle counter */ -#define PMCR_OFL_PMN0 (1 << 8) /* Count reg 0 overflow */ -#define PMCR_OFL_PMN1 (1 << 9) /* Count reg 1 overflow */ -#define PMCR_OFL_CCNT (1 << 10) /* Cycle counter overflow */ - -#define PMN0 0 -#define PMN1 1 -#define CCNT 2 - -#define CPU_COUNTER(cpu, counter) ((cpu) * 3 + (counter)) - -int arm11_setup_pmu(void); -int arm11_start_pmu(void); -int arm11_stop_pmu(void); -int arm11_request_interrupts(const int *, int); -void arm11_release_interrupts(const int *, int); - -#endif diff --git a/arch/arm/oprofile/op_model_mpcore.c b/arch/arm/oprofile/op_model_mpcore.c deleted file mode 100644 index f73ce875a395..000000000000 --- a/arch/arm/oprofile/op_model_mpcore.c +++ /dev/null @@ -1,306 +0,0 @@ -/** - * @file op_model_mpcore.c - * MPCORE Event Monitor Driver - * @remark Copyright 2004 ARM SMP Development Team - * @remark Copyright 2000-2004 Deepak Saxena - * @remark Copyright 2000-2004 MontaVista Software Inc - * @remark Copyright 2004 Dave Jiang - * @remark Copyright 2004 Intel Corporation - * @remark Copyright 2004 Zwane Mwaikambo - * @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 -#include -#include -#include -#include -#include -#include -#include - -#include -#include -#include -#include -#include -#include - -#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_EB11MP_SCU_BASE + 0x10) - -/* - * Bitmask of used SCU counters - */ -static unsigned int scu_em_used; -static const struct pmu_irqs *pmu_irqs; - -/* - * 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_EB11MP_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_EB11MP_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_EB11MP_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_EB11MP_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_EB11MP_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; - - preempt_disable(); - smp_call_function(em_func, &data, 1); - em_func(&data); - preempt_enable(); - - 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 em_start(void) -{ - int ret; - - pmu_irqs = reserve_pmu(); - if (IS_ERR(pmu_irqs)) { - ret = PTR_ERR(pmu_irqs); - goto out; - } - - ret = arm11_request_interrupts(pmu_irqs->irqs, pmu_irqs->num_irqs); - if (ret == 0) { - em_call_function(arm11_start_pmu); - - ret = scu_start(); - if (ret) { - arm11_release_interrupts(pmu_irqs->irqs, - pmu_irqs->num_irqs); - } else { - release_pmu(pmu_irqs); - pmu_irqs = NULL; - } - } - -out: - return ret; -} - -static void em_stop(void) -{ - em_call_function(arm11_stop_pmu); - arm11_release_interrupts(pmu_irqs->irqs, pmu_irqs->num_irqs); - scu_stop(); - release_pmu(pmu_irqs); -} - -/* - * 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) -{ - struct irq_desc *desc = irq_desc + irq; - const struct cpumask *mask = cpumask_of(cpu); - - spin_lock_irq(&desc->lock); - cpumask_copy(desc->affinity, mask); - desc->chip->set_affinity(irq, mask); - spin_unlock_irq(&desc->lock); -} - -static int em_setup(void) -{ - /* - * Send SCU PMU interrupts to the "owner" CPU. - */ - em_route_irq(IRQ_EB11MP_PMU_SCU0, 0); - em_route_irq(IRQ_EB11MP_PMU_SCU1, 0); - em_route_irq(IRQ_EB11MP_PMU_SCU2, 1); - em_route_irq(IRQ_EB11MP_PMU_SCU3, 1); - em_route_irq(IRQ_EB11MP_PMU_SCU4, 2); - em_route_irq(IRQ_EB11MP_PMU_SCU5, 2); - em_route_irq(IRQ_EB11MP_PMU_SCU6, 3); - em_route_irq(IRQ_EB11MP_PMU_SCU7, 3); - - return init_pmu(); -} - -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 deleted file mode 100644 index 73d811023688..000000000000 --- a/arch/arm/oprofile/op_model_mpcore.h +++ /dev/null @@ -1,61 +0,0 @@ -/** - * @file op_model_mpcore.c - * MPCORE Event Monitor Driver - * @remark Copyright 2004 ARM SMP Development Team - * @remark Copyright 2000-2004 Deepak Saxena - * @remark Copyright 2000-2004 MontaVista Software Inc - * @remark Copyright 2004 Dave Jiang - * @remark Copyright 2004 Intel Corporation - * @remark Copyright 2004 Zwane Mwaikambo - * @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 diff --git a/arch/arm/oprofile/op_model_v6.c b/arch/arm/oprofile/op_model_v6.c deleted file mode 100644 index a22357a2fd08..000000000000 --- a/arch/arm/oprofile/op_model_v6.c +++ /dev/null @@ -1,78 +0,0 @@ -/** - * @file op_model_v6.c - * ARM11 Performance Monitor Driver - * - * Based on op_model_xscale.c - * - * @remark Copyright 2000-2004 Deepak Saxena - * @remark Copyright 2000-2004 MontaVista Software Inc - * @remark Copyright 2004 Dave Jiang - * @remark Copyright 2004 Intel Corporation - * @remark Copyright 2004 Zwane Mwaikambo - * @remark Copyright 2004 OProfile Authors - * - * @remark Read the file COPYING - * - * @author Tony Lindgren - */ - -/* #define DEBUG */ -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include "op_counter.h" -#include "op_arm_model.h" -#include "op_model_arm11_core.h" - -static const struct pmu_irqs *pmu_irqs; - -static void armv6_pmu_stop(void) -{ - arm11_stop_pmu(); - arm11_release_interrupts(pmu_irqs->irqs, pmu_irqs->num_irqs); - release_pmu(pmu_irqs); - pmu_irqs = NULL; -} - -static int armv6_pmu_start(void) -{ - int ret; - - pmu_irqs = reserve_pmu(); - if (IS_ERR(pmu_irqs)) { - ret = PTR_ERR(pmu_irqs); - goto out; - } - - ret = arm11_request_interrupts(pmu_irqs->irqs, pmu_irqs->num_irqs); - if (ret >= 0) { - ret = arm11_start_pmu(); - } else { - release_pmu(pmu_irqs); - pmu_irqs = NULL; - } - -out: - return ret; -} - -static int armv6_detect_pmu(void) -{ - return 0; -} - -struct op_arm_model_spec op_armv6_spec = { - .init = armv6_detect_pmu, - .num_counters = 3, - .setup_ctrs = arm11_setup_pmu, - .start = armv6_pmu_start, - .stop = armv6_pmu_stop, - .name = "arm/armv6", -}; diff --git a/arch/arm/oprofile/op_model_v7.c b/arch/arm/oprofile/op_model_v7.c deleted file mode 100644 index 8642d0891ae1..000000000000 --- a/arch/arm/oprofile/op_model_v7.c +++ /dev/null @@ -1,415 +0,0 @@ -/** - * op_model_v7.c - * ARM V7 (Cortex A8) Event Monitor Driver - * - * Copyright 2008 Jean Pihet - * Copyright 2004 ARM SMP Development Team - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ -#include -#include -#include -#include -#include -#include -#include - -#include - -#include "op_counter.h" -#include "op_arm_model.h" -#include "op_model_v7.h" - -/* #define DEBUG */ - - -/* - * ARM V7 PMNC support - */ - -static u32 cnt_en[CNTMAX]; - -static inline void armv7_pmnc_write(u32 val) -{ - val &= PMNC_MASK; - asm volatile("mcr p15, 0, %0, c9, c12, 0" : : "r" (val)); -} - -static inline u32 armv7_pmnc_read(void) -{ - u32 val; - - asm volatile("mrc p15, 0, %0, c9, c12, 0" : "=r" (val)); - return val; -} - -static inline u32 armv7_pmnc_enable_counter(unsigned int cnt) -{ - u32 val; - - if (cnt >= CNTMAX) { - printk(KERN_ERR "oprofile: CPU%u enabling wrong PMNC counter" - " %d\n", smp_processor_id(), cnt); - return -1; - } - - if (cnt == CCNT) - val = CNTENS_C; - else - val = (1 << (cnt - CNT0)); - - val &= CNTENS_MASK; - asm volatile("mcr p15, 0, %0, c9, c12, 1" : : "r" (val)); - - return cnt; -} - -static inline u32 armv7_pmnc_disable_counter(unsigned int cnt) -{ - u32 val; - - if (cnt >= CNTMAX) { - printk(KERN_ERR "oprofile: CPU%u disabling wrong PMNC counter" - " %d\n", smp_processor_id(), cnt); - return -1; - } - - if (cnt == CCNT) - val = CNTENC_C; - else - val = (1 << (cnt - CNT0)); - - val &= CNTENC_MASK; - asm volatile("mcr p15, 0, %0, c9, c12, 2" : : "r" (val)); - - return cnt; -} - -static inline u32 armv7_pmnc_enable_intens(unsigned int cnt) -{ - u32 val; - - if (cnt >= CNTMAX) { - printk(KERN_ERR "oprofile: CPU%u enabling wrong PMNC counter" - " interrupt enable %d\n", smp_processor_id(), cnt); - return -1; - } - - if (cnt == CCNT) - val = INTENS_C; - else - val = (1 << (cnt - CNT0)); - - val &= INTENS_MASK; - asm volatile("mcr p15, 0, %0, c9, c14, 1" : : "r" (val)); - - return cnt; -} - -static inline u32 armv7_pmnc_getreset_flags(void) -{ - u32 val; - - /* Read */ - asm volatile("mrc p15, 0, %0, c9, c12, 3" : "=r" (val)); - - /* Write to clear flags */ - val &= FLAG_MASK; - asm volatile("mcr p15, 0, %0, c9, c12, 3" : : "r" (val)); - - return val; -} - -static inline int armv7_pmnc_select_counter(unsigned int cnt) -{ - u32 val; - - if ((cnt == CCNT) || (cnt >= CNTMAX)) { - printk(KERN_ERR "oprofile: CPU%u selecting wrong PMNC counteri" - " %d\n", smp_processor_id(), cnt); - return -1; - } - - val = (cnt - CNT0) & SELECT_MASK; - asm volatile("mcr p15, 0, %0, c9, c12, 5" : : "r" (val)); - - return cnt; -} - -static inline void armv7_pmnc_write_evtsel(unsigned int cnt, u32 val) -{ - if (armv7_pmnc_select_counter(cnt) == cnt) { - val &= EVTSEL_MASK; - asm volatile("mcr p15, 0, %0, c9, c13, 1" : : "r" (val)); - } -} - -static void armv7_pmnc_reset_counter(unsigned int cnt) -{ - u32 cpu_cnt = CPU_COUNTER(smp_processor_id(), cnt); - u32 val = -(u32)counter_config[cpu_cnt].count; - - switch (cnt) { - case CCNT: - armv7_pmnc_disable_counter(cnt); - - asm volatile("mcr p15, 0, %0, c9, c13, 0" : : "r" (val)); - - if (cnt_en[cnt] != 0) - armv7_pmnc_enable_counter(cnt); - - break; - - case CNT0: - case CNT1: - case CNT2: - case CNT3: - armv7_pmnc_disable_counter(cnt); - - if (armv7_pmnc_select_counter(cnt) == cnt) - asm volatile("mcr p15, 0, %0, c9, c13, 2" : : "r" (val)); - - if (cnt_en[cnt] != 0) - armv7_pmnc_enable_counter(cnt); - - break; - - default: - printk(KERN_ERR "oprofile: CPU%u resetting wrong PMNC counter" - " %d\n", smp_processor_id(), cnt); - break; - } -} - -int armv7_setup_pmnc(void) -{ - unsigned int cnt; - - if (armv7_pmnc_read() & PMNC_E) { - printk(KERN_ERR "oprofile: CPU%u PMNC still enabled when setup" - " new event counter.\n", smp_processor_id()); - return -EBUSY; - } - - /* Initialize & Reset PMNC: C bit and P bit */ - armv7_pmnc_write(PMNC_P | PMNC_C); - - - for (cnt = CCNT; cnt < CNTMAX; cnt++) { - unsigned long event; - u32 cpu_cnt = CPU_COUNTER(smp_processor_id(), cnt); - - /* - * Disable counter - */ - armv7_pmnc_disable_counter(cnt); - cnt_en[cnt] = 0; - - if (!counter_config[cpu_cnt].enabled) - continue; - - event = counter_config[cpu_cnt].event & 255; - - /* - * Set event (if destined for PMNx counters) - * We don't need to set the event if it's a cycle count - */ - if (cnt != CCNT) - armv7_pmnc_write_evtsel(cnt, event); - - /* - * Enable interrupt for this counter - */ - armv7_pmnc_enable_intens(cnt); - - /* - * Reset counter - */ - armv7_pmnc_reset_counter(cnt); - - /* - * Enable counter - */ - armv7_pmnc_enable_counter(cnt); - cnt_en[cnt] = 1; - } - - return 0; -} - -static inline void armv7_start_pmnc(void) -{ - armv7_pmnc_write(armv7_pmnc_read() | PMNC_E); -} - -static inline void armv7_stop_pmnc(void) -{ - armv7_pmnc_write(armv7_pmnc_read() & ~PMNC_E); -} - -/* - * CPU counters' IRQ handler (one IRQ per CPU) - */ -static irqreturn_t armv7_pmnc_interrupt(int irq, void *arg) -{ - struct pt_regs *regs = get_irq_regs(); - unsigned int cnt; - u32 flags; - - - /* - * Stop IRQ generation - */ - armv7_stop_pmnc(); - - /* - * Get and reset overflow status flags - */ - flags = armv7_pmnc_getreset_flags(); - - /* - * Cycle counter - */ - if (flags & FLAG_C) { - u32 cpu_cnt = CPU_COUNTER(smp_processor_id(), CCNT); - armv7_pmnc_reset_counter(CCNT); - oprofile_add_sample(regs, cpu_cnt); - } - - /* - * PMNC counters 0:3 - */ - for (cnt = CNT0; cnt < CNTMAX; cnt++) { - if (flags & (1 << (cnt - CNT0))) { - u32 cpu_cnt = CPU_COUNTER(smp_processor_id(), cnt); - armv7_pmnc_reset_counter(cnt); - oprofile_add_sample(regs, cpu_cnt); - } - } - - /* - * Allow IRQ generation - */ - armv7_start_pmnc(); - - return IRQ_HANDLED; -} - -int armv7_request_interrupts(const int *irqs, int nr) -{ - unsigned int i; - int ret = 0; - - for (i = 0; i < nr; i++) { - ret = request_irq(irqs[i], armv7_pmnc_interrupt, - IRQF_DISABLED, "CP15 PMNC", NULL); - if (ret != 0) { - printk(KERN_ERR "oprofile: unable to request IRQ%u" - " for ARMv7\n", - irqs[i]); - break; - } - } - - if (i != nr) - while (i-- != 0) - free_irq(irqs[i], NULL); - - return ret; -} - -void armv7_release_interrupts(const int *irqs, int nr) -{ - unsigned int i; - - for (i = 0; i < nr; i++) - free_irq(irqs[i], NULL); -} - -#ifdef DEBUG -static void armv7_pmnc_dump_regs(void) -{ - u32 val; - unsigned int cnt; - - printk(KERN_INFO "PMNC registers dump:\n"); - - asm volatile("mrc p15, 0, %0, c9, c12, 0" : "=r" (val)); - printk(KERN_INFO "PMNC =0x%08x\n", val); - - asm volatile("mrc p15, 0, %0, c9, c12, 1" : "=r" (val)); - printk(KERN_INFO "CNTENS=0x%08x\n", val); - - asm volatile("mrc p15, 0, %0, c9, c14, 1" : "=r" (val)); - printk(KERN_INFO "INTENS=0x%08x\n", val); - - asm volatile("mrc p15, 0, %0, c9, c12, 3" : "=r" (val)); - printk(KERN_INFO "FLAGS =0x%08x\n", val); - - asm volatile("mrc p15, 0, %0, c9, c12, 5" : "=r" (val)); - printk(KERN_INFO "SELECT=0x%08x\n", val); - - asm volatile("mrc p15, 0, %0, c9, c13, 0" : "=r" (val)); - printk(KERN_INFO "CCNT =0x%08x\n", val); - - for (cnt = CNT0; cnt < CNTMAX; cnt++) { - armv7_pmnc_select_counter(cnt); - asm volatile("mrc p15, 0, %0, c9, c13, 2" : "=r" (val)); - printk(KERN_INFO "CNT[%d] count =0x%08x\n", cnt-CNT0, val); - asm volatile("mrc p15, 0, %0, c9, c13, 1" : "=r" (val)); - printk(KERN_INFO "CNT[%d] evtsel=0x%08x\n", cnt-CNT0, val); - } -} -#endif - -static const struct pmu_irqs *pmu_irqs; - -static void armv7_pmnc_stop(void) -{ -#ifdef DEBUG - armv7_pmnc_dump_regs(); -#endif - armv7_stop_pmnc(); - 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(pmu_irqs->irqs, pmu_irqs->num_irqs); - if (ret >= 0) { - armv7_start_pmnc(); - } else { - release_pmu(pmu_irqs); - pmu_irqs = NULL; - } - - return ret; -} - -static int armv7_detect_pmnc(void) -{ - return 0; -} - -struct op_arm_model_spec op_armv7_spec = { - .init = armv7_detect_pmnc, - .num_counters = 5, - .setup_ctrs = armv7_setup_pmnc, - .start = armv7_pmnc_start, - .stop = armv7_pmnc_stop, - .name = "arm/armv7", -}; diff --git a/arch/arm/oprofile/op_model_v7.h b/arch/arm/oprofile/op_model_v7.h deleted file mode 100644 index 9ca334b39c75..000000000000 --- a/arch/arm/oprofile/op_model_v7.h +++ /dev/null @@ -1,103 +0,0 @@ -/** - * op_model_v7.h - * ARM v7 (Cortex A8) Event Monitor Driver - * - * Copyright 2008 Jean Pihet - * Copyright 2004 ARM SMP Development Team - * Copyright 2000-2004 Deepak Saxena - * Copyright 2000-2004 MontaVista Software Inc - * Copyright 2004 Dave Jiang - * Copyright 2004 Intel Corporation - * Copyright 2004 Zwane Mwaikambo - * Copyright 2004 Oprofile Authors - * - * Read the file COPYING - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ -#ifndef OP_MODEL_V7_H -#define OP_MODEL_V7_H - -/* - * Per-CPU PMNC: config reg - */ -#define PMNC_E (1 << 0) /* Enable all counters */ -#define PMNC_P (1 << 1) /* Reset all counters */ -#define PMNC_C (1 << 2) /* Cycle counter reset */ -#define PMNC_D (1 << 3) /* CCNT counts every 64th cpu cycle */ -#define PMNC_X (1 << 4) /* Export to ETM */ -#define PMNC_DP (1 << 5) /* Disable CCNT if non-invasive debug*/ -#define PMNC_MASK 0x3f /* Mask for writable bits */ - -/* - * Available counters - */ -#define CCNT 0 -#define CNT0 1 -#define CNT1 2 -#define CNT2 3 -#define CNT3 4 -#define CNTMAX 5 - -#define CPU_COUNTER(cpu, counter) ((cpu) * CNTMAX + (counter)) - -/* - * CNTENS: counters enable reg - */ -#define CNTENS_P0 (1 << 0) -#define CNTENS_P1 (1 << 1) -#define CNTENS_P2 (1 << 2) -#define CNTENS_P3 (1 << 3) -#define CNTENS_C (1 << 31) -#define CNTENS_MASK 0x8000000f /* Mask for writable bits */ - -/* - * CNTENC: counters disable reg - */ -#define CNTENC_P0 (1 << 0) -#define CNTENC_P1 (1 << 1) -#define CNTENC_P2 (1 << 2) -#define CNTENC_P3 (1 << 3) -#define CNTENC_C (1 << 31) -#define CNTENC_MASK 0x8000000f /* Mask for writable bits */ - -/* - * INTENS: counters overflow interrupt enable reg - */ -#define INTENS_P0 (1 << 0) -#define INTENS_P1 (1 << 1) -#define INTENS_P2 (1 << 2) -#define INTENS_P3 (1 << 3) -#define INTENS_C (1 << 31) -#define INTENS_MASK 0x8000000f /* Mask for writable bits */ - -/* - * EVTSEL: Event selection reg - */ -#define EVTSEL_MASK 0x7f /* Mask for writable bits */ - -/* - * SELECT: Counter selection reg - */ -#define SELECT_MASK 0x1f /* Mask for writable bits */ - -/* - * FLAG: counters overflow flag status reg - */ -#define FLAG_P0 (1 << 0) -#define FLAG_P1 (1 << 1) -#define FLAG_P2 (1 << 2) -#define FLAG_P3 (1 << 3) -#define FLAG_C (1 << 31) -#define FLAG_MASK 0x8000000f /* Mask for writable bits */ - - -int armv7_setup_pmu(void); -int armv7_start_pmu(void); -int armv7_stop_pmu(void); -int armv7_request_interrupts(const int *, int); -void armv7_release_interrupts(const int *, int); - -#endif diff --git a/arch/arm/oprofile/op_model_xscale.c b/arch/arm/oprofile/op_model_xscale.c deleted file mode 100644 index 1d34a02048bd..000000000000 --- a/arch/arm/oprofile/op_model_xscale.c +++ /dev/null @@ -1,444 +0,0 @@ -/** - * @file op_model_xscale.c - * XScale Performance Monitor Driver - * - * @remark Copyright 2000-2004 Deepak Saxena - * @remark Copyright 2000-2004 MontaVista Software Inc - * @remark Copyright 2004 Dave Jiang - * @remark Copyright 2004 Intel Corporation - * @remark Copyright 2004 Zwane Mwaikambo - * @remark Copyright 2004 OProfile Authors - * - * @remark Read the file COPYING - * - * @author Zwane Mwaikambo - */ - -/* #define DEBUG */ -#include -#include -#include -#include -#include -#include -#include - -#include -#include - -#include "op_counter.h" -#include "op_arm_model.h" - -#define PMU_ENABLE 0x001 /* Enable counters */ -#define PMN_RESET 0x002 /* Reset event counters */ -#define CCNT_RESET 0x004 /* Reset clock counter */ -#define PMU_RESET (CCNT_RESET | PMN_RESET) -#define PMU_CNT64 0x008 /* Make CCNT count every 64th cycle */ - -/* - * Different types of events that can be counted by the XScale PMU - * as used by Oprofile userspace. Here primarily for documentation - * purposes. - */ - -#define EVT_ICACHE_MISS 0x00 -#define EVT_ICACHE_NO_DELIVER 0x01 -#define EVT_DATA_STALL 0x02 -#define EVT_ITLB_MISS 0x03 -#define EVT_DTLB_MISS 0x04 -#define EVT_BRANCH 0x05 -#define EVT_BRANCH_MISS 0x06 -#define EVT_INSTRUCTION 0x07 -#define EVT_DCACHE_FULL_STALL 0x08 -#define EVT_DCACHE_FULL_STALL_CONTIG 0x09 -#define EVT_DCACHE_ACCESS 0x0A -#define EVT_DCACHE_MISS 0x0B -#define EVT_DCACE_WRITE_BACK 0x0C -#define EVT_PC_CHANGED 0x0D -#define EVT_BCU_REQUEST 0x10 -#define EVT_BCU_FULL 0x11 -#define EVT_BCU_DRAIN 0x12 -#define EVT_BCU_ECC_NO_ELOG 0x14 -#define EVT_BCU_1_BIT_ERR 0x15 -#define EVT_RMW 0x16 -/* EVT_CCNT is not hardware defined */ -#define EVT_CCNT 0xFE -#define EVT_UNUSED 0xFF - -struct pmu_counter { - volatile unsigned long ovf; - unsigned long reset_counter; -}; - -enum { CCNT, PMN0, PMN1, PMN2, PMN3, MAX_COUNTERS }; - -static struct pmu_counter results[MAX_COUNTERS]; - -/* - * There are two versions of the PMU in current XScale processors - * with differing register layouts and number of performance counters. - * e.g. IOP32x is xsc1 whilst IOP33x is xsc2. - * We detect which register layout to use in xscale_detect_pmu() - */ -enum { PMU_XSC1, PMU_XSC2 }; - -struct pmu_type { - int id; - char *name; - int num_counters; - unsigned int int_enable; - unsigned int cnt_ovf[MAX_COUNTERS]; - unsigned int int_mask[MAX_COUNTERS]; -}; - -static struct pmu_type pmu_parms[] = { - { - .id = PMU_XSC1, - .name = "arm/xscale1", - .num_counters = 3, - .int_mask = { [PMN0] = 0x10, [PMN1] = 0x20, - [CCNT] = 0x40 }, - .cnt_ovf = { [CCNT] = 0x400, [PMN0] = 0x100, - [PMN1] = 0x200}, - }, - { - .id = PMU_XSC2, - .name = "arm/xscale2", - .num_counters = 5, - .int_mask = { [CCNT] = 0x01, [PMN0] = 0x02, - [PMN1] = 0x04, [PMN2] = 0x08, - [PMN3] = 0x10 }, - .cnt_ovf = { [CCNT] = 0x01, [PMN0] = 0x02, - [PMN1] = 0x04, [PMN2] = 0x08, - [PMN3] = 0x10 }, - }, -}; - -static struct pmu_type *pmu; - -static void write_pmnc(u32 val) -{ - if (pmu->id == PMU_XSC1) { - /* upper 4bits and 7, 11 are write-as-0 */ - val &= 0xffff77f; - __asm__ __volatile__ ("mcr p14, 0, %0, c0, c0, 0" : : "r" (val)); - } else { - /* bits 4-23 are write-as-0, 24-31 are write ignored */ - val &= 0xf; - __asm__ __volatile__ ("mcr p14, 0, %0, c0, c1, 0" : : "r" (val)); - } -} - -static u32 read_pmnc(void) -{ - u32 val; - - if (pmu->id == PMU_XSC1) - __asm__ __volatile__ ("mrc p14, 0, %0, c0, c0, 0" : "=r" (val)); - else { - __asm__ __volatile__ ("mrc p14, 0, %0, c0, c1, 0" : "=r" (val)); - /* bits 1-2 and 4-23 are read-unpredictable */ - val &= 0xff000009; - } - - return val; -} - -static u32 __xsc1_read_counter(int counter) -{ - u32 val = 0; - - switch (counter) { - case CCNT: - __asm__ __volatile__ ("mrc p14, 0, %0, c1, c0, 0" : "=r" (val)); - break; - case PMN0: - __asm__ __volatile__ ("mrc p14, 0, %0, c2, c0, 0" : "=r" (val)); - break; - case PMN1: - __asm__ __volatile__ ("mrc p14, 0, %0, c3, c0, 0" : "=r" (val)); - break; - } - return val; -} - -static u32 __xsc2_read_counter(int counter) -{ - u32 val = 0; - - switch (counter) { - case CCNT: - __asm__ __volatile__ ("mrc p14, 0, %0, c1, c1, 0" : "=r" (val)); - break; - case PMN0: - __asm__ __volatile__ ("mrc p14, 0, %0, c0, c2, 0" : "=r" (val)); - break; - case PMN1: - __asm__ __volatile__ ("mrc p14, 0, %0, c1, c2, 0" : "=r" (val)); - break; - case PMN2: - __asm__ __volatile__ ("mrc p14, 0, %0, c2, c2, 0" : "=r" (val)); - break; - case PMN3: - __asm__ __volatile__ ("mrc p14, 0, %0, c3, c2, 0" : "=r" (val)); - break; - } - return val; -} - -static u32 read_counter(int counter) -{ - u32 val; - - if (pmu->id == PMU_XSC1) - val = __xsc1_read_counter(counter); - else - val = __xsc2_read_counter(counter); - - return val; -} - -static void __xsc1_write_counter(int counter, u32 val) -{ - switch (counter) { - case CCNT: - __asm__ __volatile__ ("mcr p14, 0, %0, c1, c0, 0" : : "r" (val)); - break; - case PMN0: - __asm__ __volatile__ ("mcr p14, 0, %0, c2, c0, 0" : : "r" (val)); - break; - case PMN1: - __asm__ __volatile__ ("mcr p14, 0, %0, c3, c0, 0" : : "r" (val)); - break; - } -} - -static void __xsc2_write_counter(int counter, u32 val) -{ - switch (counter) { - case CCNT: - __asm__ __volatile__ ("mcr p14, 0, %0, c1, c1, 0" : : "r" (val)); - break; - case PMN0: - __asm__ __volatile__ ("mcr p14, 0, %0, c0, c2, 0" : : "r" (val)); - break; - case PMN1: - __asm__ __volatile__ ("mcr p14, 0, %0, c1, c2, 0" : : "r" (val)); - break; - case PMN2: - __asm__ __volatile__ ("mcr p14, 0, %0, c2, c2, 0" : : "r" (val)); - break; - case PMN3: - __asm__ __volatile__ ("mcr p14, 0, %0, c3, c2, 0" : : "r" (val)); - break; - } -} - -static void write_counter(int counter, u32 val) -{ - if (pmu->id == PMU_XSC1) - __xsc1_write_counter(counter, val); - else - __xsc2_write_counter(counter, val); -} - -static int xscale_setup_ctrs(void) -{ - u32 evtsel, pmnc; - int i; - - for (i = CCNT; i < MAX_COUNTERS; i++) { - if (counter_config[i].enabled) - continue; - - counter_config[i].event = EVT_UNUSED; - } - - switch (pmu->id) { - case PMU_XSC1: - pmnc = (counter_config[PMN1].event << 20) | (counter_config[PMN0].event << 12); - pr_debug("xscale_setup_ctrs: pmnc: %#08x\n", pmnc); - write_pmnc(pmnc); - break; - - case PMU_XSC2: - evtsel = counter_config[PMN0].event | (counter_config[PMN1].event << 8) | - (counter_config[PMN2].event << 16) | (counter_config[PMN3].event << 24); - - pr_debug("xscale_setup_ctrs: evtsel %#08x\n", evtsel); - __asm__ __volatile__ ("mcr p14, 0, %0, c8, c1, 0" : : "r" (evtsel)); - break; - } - - for (i = CCNT; i < MAX_COUNTERS; i++) { - if (counter_config[i].event == EVT_UNUSED) { - counter_config[i].event = 0; - pmu->int_enable &= ~pmu->int_mask[i]; - continue; - } - - results[i].reset_counter = counter_config[i].count; - write_counter(i, -(u32)counter_config[i].count); - pmu->int_enable |= pmu->int_mask[i]; - pr_debug("xscale_setup_ctrs: counter%d %#08x from %#08lx\n", i, - read_counter(i), counter_config[i].count); - } - - return 0; -} - -static void inline __xsc1_check_ctrs(void) -{ - int i; - u32 pmnc = read_pmnc(); - - /* NOTE: there's an A stepping errata that states if an overflow */ - /* bit already exists and another occurs, the previous */ - /* Overflow bit gets cleared. There's no workaround. */ - /* Fixed in B stepping or later */ - - /* Write the value back to clear the overflow flags. Overflow */ - /* flags remain in pmnc for use below */ - write_pmnc(pmnc & ~PMU_ENABLE); - - for (i = CCNT; i <= PMN1; i++) { - if (!(pmu->int_mask[i] & pmu->int_enable)) - continue; - - if (pmnc & pmu->cnt_ovf[i]) - results[i].ovf++; - } -} - -static void inline __xsc2_check_ctrs(void) -{ - int i; - u32 flag = 0, pmnc = read_pmnc(); - - pmnc &= ~PMU_ENABLE; - write_pmnc(pmnc); - - /* read overflow flag register */ - __asm__ __volatile__ ("mrc p14, 0, %0, c5, c1, 0" : "=r" (flag)); - - for (i = CCNT; i <= PMN3; i++) { - if (!(pmu->int_mask[i] & pmu->int_enable)) - continue; - - if (flag & pmu->cnt_ovf[i]) - results[i].ovf++; - } - - /* writeback clears overflow bits */ - __asm__ __volatile__ ("mcr p14, 0, %0, c5, c1, 0" : : "r" (flag)); -} - -static irqreturn_t xscale_pmu_interrupt(int irq, void *arg) -{ - int i; - u32 pmnc; - - if (pmu->id == PMU_XSC1) - __xsc1_check_ctrs(); - else - __xsc2_check_ctrs(); - - for (i = CCNT; i < MAX_COUNTERS; i++) { - if (!results[i].ovf) - continue; - - write_counter(i, -(u32)results[i].reset_counter); - oprofile_add_sample(get_irq_regs(), i); - results[i].ovf--; - } - - pmnc = read_pmnc() | PMU_ENABLE; - write_pmnc(pmnc); - - return IRQ_HANDLED; -} - -static const struct pmu_irqs *pmu_irqs; - -static void xscale_pmu_stop(void) -{ - u32 pmnc = read_pmnc(); - - pmnc &= ~PMU_ENABLE; - write_pmnc(pmnc); - - free_irq(pmu_irqs->irqs[0], results); - release_pmu(pmu_irqs); - pmu_irqs = NULL; -} - -static int xscale_pmu_start(void) -{ - int ret; - u32 pmnc; - - pmu_irqs = reserve_pmu(); - if (IS_ERR(pmu_irqs)) - return PTR_ERR(pmu_irqs); - - pmnc = read_pmnc(); - - ret = request_irq(pmu_irqs->irqs[0], xscale_pmu_interrupt, - IRQF_DISABLED, "XScale PMU", (void *)results); - - if (ret < 0) { - printk(KERN_ERR "oprofile: unable to request IRQ%d for XScale PMU\n", - pmu_irqs->irqs[0]); - release_pmu(pmu_irqs); - pmu_irqs = NULL; - return ret; - } - - if (pmu->id == PMU_XSC1) - pmnc |= pmu->int_enable; - else { - __asm__ __volatile__ ("mcr p14, 0, %0, c4, c1, 0" : : "r" (pmu->int_enable)); - pmnc &= ~PMU_CNT64; - } - - pmnc |= PMU_ENABLE; - write_pmnc(pmnc); - pr_debug("xscale_pmu_start: pmnc: %#08x mask: %08x\n", pmnc, pmu->int_enable); - return 0; -} - -static int xscale_detect_pmu(void) -{ - int ret = 0; - u32 id; - - id = (read_cpuid(CPUID_ID) >> 13) & 0x7; - - switch (id) { - case 1: - pmu = &pmu_parms[PMU_XSC1]; - break; - case 2: - pmu = &pmu_parms[PMU_XSC2]; - break; - default: - ret = -ENODEV; - break; - } - - if (!ret) { - op_xscale_spec.name = pmu->name; - op_xscale_spec.num_counters = pmu->num_counters; - pr_debug("xscale_detect_pmu: detected %s PMU\n", pmu->name); - } - - return ret; -} - -struct op_arm_model_spec op_xscale_spec = { - .init = xscale_detect_pmu, - .setup_ctrs = xscale_setup_ctrs, - .start = xscale_pmu_start, - .stop = xscale_pmu_stop, -}; - -- cgit v1.2.3