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Diffstat (limited to 'arch/arm/oprofile/op_model_v7.c')
-rw-r--r--arch/arm/oprofile/op_model_v7.c415
1 files changed, 0 insertions, 415 deletions
diff --git a/arch/arm/oprofile/op_model_v7.c b/arch/arm/oprofile/op_model_v7.c
deleted file mode 100644
index 8642d0891ae..00000000000
--- 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 <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",
-};
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