diff options
Diffstat (limited to 'recipes/linux/linux-omap-2.6.28/oprofile-0.9.3.armv7.diff')
| -rw-r--r-- | recipes/linux/linux-omap-2.6.28/oprofile-0.9.3.armv7.diff | 599 |
1 files changed, 599 insertions, 0 deletions
diff --git a/recipes/linux/linux-omap-2.6.28/oprofile-0.9.3.armv7.diff b/recipes/linux/linux-omap-2.6.28/oprofile-0.9.3.armv7.diff new file mode 100644 index 0000000000..1eedbb50ff --- /dev/null +++ b/recipes/linux/linux-omap-2.6.28/oprofile-0.9.3.armv7.diff @@ -0,0 +1,599 @@ +Hi, + +This patch adds Oprofile support on ARMv7, using the PMNC unit. +Tested on OMAP3430 SDP. + +Feedback and comments are welcome. + +The patch to user space components is attached for reference. It i applies +against version 0.9.3 of oprofile source +(http://prdownloads.sourceforge.net/oprofile/oprofile-0.9.3.tar.gz). + +Regards, +Jean. + +--- + +From: Jean Pihet <jpihet@mvista.com> +Date: Tue, 6 May 2008 17:21:44 +0200 +Subject: [PATCH] ARM: Add ARMv7 oprofile support + +Add ARMv7 Oprofile support to kernel + +Signed-off-by: Jean Pihet <jpihet@mvista.com> +--- + +diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig +index c60a27d..60b50a0 100644 +--- a/arch/arm/Kconfig ++++ b/arch/arm/Kconfig +@@ -161,6 +161,11 @@ config OPROFILE_MPCORE + config OPROFILE_ARM11_CORE + bool + ++config OPROFILE_ARMV7 ++ def_bool y ++ depends on CPU_V7 && !SMP ++ bool ++ + endif + + config VECTORS_BASE +diff --git a/arch/arm/oprofile/Makefile b/arch/arm/oprofile/Makefile +index e61d0cc..88e31f5 100644 +--- a/arch/arm/oprofile/Makefile ++++ b/arch/arm/oprofile/Makefile +@@ -11,3 +11,4 @@ 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 +diff --git a/arch/arm/oprofile/common.c b/arch/arm/oprofile/common.c +index 0a5cf3a..3fcd752 100644 +--- a/arch/arm/oprofile/common.c ++++ b/arch/arm/oprofile/common.c +@@ -145,6 +145,10 @@ int __init oprofile_arch_init(struct oprofile_operations *ops) + spec = &op_mpcore_spec; + #endif + ++#ifdef CONFIG_OPROFILE_ARMV7 ++ spec = &op_armv7_spec; ++#endif ++ + if (spec) { + ret = spec->init(); + if (ret < 0) +diff --git a/arch/arm/oprofile/op_arm_model.h +b/arch/arm/oprofile/op_arm_model.h +index 4899c62..8c4e4f6 100644 +--- a/arch/arm/oprofile/op_arm_model.h ++++ b/arch/arm/oprofile/op_arm_model.h +@@ -26,6 +26,7 @@ extern struct op_arm_model_spec op_xscale_spec; + + 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); + +diff --git a/arch/arm/oprofile/op_model_v7.c b/arch/arm/oprofile/op_model_v7.c +new file mode 100644 +index 0000000..a159bc1 +--- /dev/null ++++ b/arch/arm/oprofile/op_model_v7.c +@@ -0,0 +1,407 @@ ++/** ++ * @file op_model_v7.c ++ * ARM V7 (Cortex A8) Event Monitor Driver ++ * ++ * @remark Copyright 2008 Jean Pihet <jpihet@mvista.com> ++ * @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_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, D bit and P bit. ++ * Note: Using a slower count for CCNT (D bit: divide by 64) results ++ * in a more stable system ++ */ ++ armv7_pmnc_write(PMNC_P | PMNC_C | PMNC_D); ++ ++ ++ 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(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(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 int irqs[] = { ++#ifdef CONFIG_ARCH_OMAP3 ++ INT_34XX_BENCH_MPU_EMUL, ++#endif ++}; ++ ++static void armv7_pmnc_stop(void) ++{ ++#ifdef DEBUG ++ armv7_pmnc_dump_regs(); ++#endif ++ armv7_stop_pmnc(); ++ armv7_release_interrupts(irqs, ARRAY_SIZE(irqs)); ++} ++ ++static int armv7_pmnc_start(void) ++{ ++ int ret; ++ ++#ifdef DEBUG ++ armv7_pmnc_dump_regs(); ++#endif ++ ret = armv7_request_interrupts(irqs, ARRAY_SIZE(irqs)); ++ if (ret >= 0) ++ armv7_start_pmnc(); ++ ++ 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 +new file mode 100644 +index 0000000..08f40ea +--- /dev/null ++++ b/arch/arm/oprofile/op_model_v7.h +@@ -0,0 +1,101 @@ ++/** ++ * @file op_model_v7.h ++ * ARM v7 (Cortex A8) Event Monitor Driver ++ * ++ * @remark Copyright 2008 Jean Pihet <jpihet@mvista.com> ++ * @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_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(int *, int); ++void armv7_release_interrupts(int *, int); ++ ++#endif + |