select RTC_LIB
select SYS_SUPPORTS_APM_EMULATION
select GENERIC_ATOMIC64 if (!CPU_32v6K)
- select HAVE_OPROFILE
+ select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
select HAVE_ARCH_KGDB
select HAVE_KPROBES if (!XIP_KERNEL)
select HAVE_KRETPROBES if (HAVE_KPROBES)
help
Setting ARM L1 cache line size to 64 Bytes.
-if OPROFILE
-
-config OPROFILE_ARMV6
- def_bool y
- depends on CPU_V6 && !SMP
- select OPROFILE_ARM11_CORE
-
-config OPROFILE_MPCORE
- def_bool y
- depends on CPU_V6 && SMP
- select OPROFILE_ARM11_CORE
-
-config OPROFILE_ARM11_CORE
- bool
-
-config OPROFILE_ARMV7
- def_bool y
- depends on CPU_V7 && !SMP
- bool
-
-endif
-
config VECTORS_BASE
hex
default 0xffff0000 if MMU || CPU_HIGH_VECTOR
config HW_PERF_EVENTS
bool "Enable hardware performance counter support for perf events"
- depends on PERF_EVENTS && CPU_HAS_PMU && (CPU_V6 || CPU_V7)
+ depends on PERF_EVENTS && CPU_HAS_PMU
default y
help
Enable hardware performance counter support for perf events. If
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
+++ /dev/null
-/*
- * Arm specific backtracing code for oprofile
- *
- * Copyright 2005 Openedhand Ltd.
- *
- * Author: Richard Purdie <rpurdie@openedhand.com>
- *
- * 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 <linux/oprofile.h>
-#include <linux/sched.h>
-#include <linux/mm.h>
-#include <linux/uaccess.h>
-#include <asm/ptrace.h>
-#include <asm/stacktrace.h>
-
-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);
-}
+++ /dev/null
-/**
- * @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 */
+++ /dev/null
-/**
- * @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 */
+++ /dev/null
-/**
- * @file op_model_arm11_core.c
- * ARM11 Event Monitor Driver
- * @remark Copyright 2004 ARM SMP Development Team
- */
-#include <linux/types.h>
-#include <linux/errno.h>
-#include <linux/oprofile.h>
-#include <linux/interrupt.h>
-#include <linux/irq.h>
-#include <linux/smp.h>
-
-#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);
-}
+++ /dev/null
-/**
- * @file op_model_arm11_core.h
- * ARM11 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_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
+++ /dev/null
-/**
- * @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/err.h>
-#include <linux/sched.h>
-#include <linux/oprofile.h>
-#include <linux/interrupt.h>
-#include <linux/smp.h>
-#include <linux/io.h>
-
-#include <asm/irq.h>
-#include <asm/mach/irq.h>
-#include <mach/hardware.h>
-#include <mach/board-eb.h>
-#include <asm/system.h>
-#include <asm/pmu.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_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",
-};
+++ /dev/null
-/**
- * @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
+++ /dev/null
-/**
- * @file op_model_v6.c
- * ARM11 Performance Monitor Driver
- *
- * Based on op_model_xscale.c
- *
- * @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 Tony Lindgren <tony@atomide.com>
- */
-
-/* #define DEBUG */
-#include <linux/types.h>
-#include <linux/errno.h>
-#include <linux/err.h>
-#include <linux/sched.h>
-#include <linux/oprofile.h>
-#include <linux/interrupt.h>
-#include <asm/irq.h>
-#include <asm/system.h>
-#include <asm/pmu.h>
-
-#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",
-};
+++ /dev/null
-/**
- * op_model_v7.c
- * ARM V7 (Cortex A8) Event Monitor Driver
- *
- * Copyright 2008 Jean Pihet <jpihet@mvista.com>
- * 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 <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"
-
-/* #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",
-};
+++ /dev/null
-/**
- * op_model_v7.h
- * ARM v7 (Cortex A8) Event Monitor Driver
- *
- * Copyright 2008 Jean Pihet <jpihet@mvista.com>
- * Copyright 2004 ARM SMP Development Team
- * Copyright 2000-2004 Deepak Saxena <dsaxena@mvista.com>
- * Copyright 2000-2004 MontaVista Software Inc
- * Copyright 2004 Dave Jiang <dave.jiang@intel.com>
- * Copyright 2004 Intel Corporation
- * Copyright 2004 Zwane Mwaikambo <zwane@arm.linux.org.uk>
- * 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
+++ /dev/null
-/**
- * @file op_model_xscale.c
- * XScale Performance Monitor Driver
- *
- * @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
- */
-
-/* #define DEBUG */
-#include <linux/types.h>
-#include <linux/errno.h>
-#include <linux/err.h>
-#include <linux/sched.h>
-#include <linux/oprofile.h>
-#include <linux/interrupt.h>
-#include <linux/irq.h>
-
-#include <asm/cputype.h>
-#include <asm/pmu.h>
-
-#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,
-};
-
projects / platform / kernel / linux-stable.git / commitdiff