diff options
Diffstat (limited to 'packages/linux/linux-2.6.18/avr32-oprofile.patch')
| -rw-r--r-- | packages/linux/linux-2.6.18/avr32-oprofile.patch | 610 |
1 files changed, 610 insertions, 0 deletions
diff --git a/packages/linux/linux-2.6.18/avr32-oprofile.patch b/packages/linux/linux-2.6.18/avr32-oprofile.patch new file mode 100644 index 0000000000..5fbc9855aa --- /dev/null +++ b/packages/linux/linux-2.6.18/avr32-oprofile.patch @@ -0,0 +1,610 @@ +From nobody Mon Sep 17 00:00:00 2001 +From: Haavard Skinnemoen <hskinnemoen@atmel.com> +Date: Wed Jan 4 17:26:23 2006 +0100 +Subject: [PATCH] AVR32 oprofile implementation + +This adds support for oprofile on the AVR32 architecture. +--- + + arch/avr32/Kconfig | 2 + arch/avr32/Makefile | 1 + arch/avr32/oprofile/Kconfig | 23 +++ + arch/avr32/oprofile/Makefile | 10 + + arch/avr32/oprofile/common.c | 169 +++++++++++++++++++++++++++ + arch/avr32/oprofile/init.c | 29 ++++ + arch/avr32/oprofile/op_avr32_model.h | 25 +++ + arch/avr32/oprofile/op_counter.h | 29 ++++ + arch/avr32/oprofile/op_model_avr32.c | 219 +++++++++++++++++++++++++++++++++++ + arch/avr32/oprofile/op_model_avr32.h | 21 +++ + 10 files changed, 528 insertions(+) + +Index: linux-2.6.18-avr32/arch/avr32/oprofile/Kconfig +=================================================================== +--- /dev/null 1970-01-01 00:00:00.000000000 +0000 ++++ linux-2.6.18-avr32/arch/avr32/oprofile/Kconfig 2006-10-20 14:08:20.000000000 +0200 +@@ -0,0 +1,23 @@ ++ ++menu "Profiling support" ++ depends on EXPERIMENTAL ++ ++config PROFILING ++ bool "Profiling support (EXPERIMENTAL)" ++ help ++ Say Y here to enable the extended profiling support mechanisms used ++ by profilers such as OProfile. ++ ++ ++config OPROFILE ++ tristate "OProfile system profiling (EXPERIMENTAL)" ++ depends on PROFILING ++ help ++ OProfile is a profiling system capable of profiling the ++ whole system, including the kernel, kernel modules, libraries, ++ and applications. ++ ++ If unsure, say N. ++ ++endmenu ++ +Index: linux-2.6.18-avr32/arch/avr32/oprofile/Makefile +=================================================================== +--- /dev/null 1970-01-01 00:00:00.000000000 +0000 ++++ linux-2.6.18-avr32/arch/avr32/oprofile/Makefile 2006-10-20 14:08:20.000000000 +0200 +@@ -0,0 +1,10 @@ ++obj-$(CONFIG_OPROFILE) += oprofile.o ++ ++DRIVER_OBJS = $(addprefix ../../../drivers/oprofile/, \ ++ oprof.o cpu_buffer.o buffer_sync.o \ ++ event_buffer.o oprofile_files.o \ ++ oprofilefs.o oprofile_stats.o \ ++ timer_int.o ) ++ ++oprofile-y := $(DRIVER_OBJS) init.o common.o ++oprofile-y += op_model_avr32.o +Index: linux-2.6.18-avr32/arch/avr32/oprofile/common.c +=================================================================== +--- /dev/null 1970-01-01 00:00:00.000000000 +0000 ++++ linux-2.6.18-avr32/arch/avr32/oprofile/common.c 2006-10-20 14:08:20.000000000 +0200 +@@ -0,0 +1,169 @@ ++/* ++ * Copyright (C) 2005-2006 Atmel Corporation ++ * ++ * 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. ++ * ++ * Author: Ronny Pedersen ++ */ ++ ++#define DEBUG ++#include <linux/init.h> ++#include <linux/oprofile.h> ++#include <linux/errno.h> ++#include <asm/semaphore.h> ++#include <linux/sysdev.h> ++ ++#include "op_avr32_model.h" ++#include "op_counter.h" ++ ++static struct op_avr32_model_spec *pc_model; ++static int pc_enabled = 0; ++static struct semaphore pc_sem; ++ ++ ++static int pc_start(void); ++static int pc_setup(void); ++static void pc_stop(void); ++static int pc_create_files(struct super_block *, struct dentry *); ++ ++ ++struct op_counter_config counter_config[OP_MAX_COUNTER]; ++ ++static int pc_suspend(struct sys_device *dev, u32 state) ++{ ++ if (pc_enabled) ++ pc_stop(); ++ return 0; ++} ++ ++static int pc_resume(struct sys_device *dev) ++{ ++ if (pc_enabled) ++ pc_start(); ++ return 0; ++} ++ ++static struct sysdev_class oprofile_sysclass = { ++ set_kset_name("oprofile"), ++ .resume = pc_resume, ++ .suspend = pc_suspend, ++}; ++ ++static struct sys_device device_oprofile = { ++ .id = 0, ++ .cls = &oprofile_sysclass, ++}; ++ ++static int __init init_driverfs(void) ++{ ++ int ret; ++ ++ if (!(ret = sysdev_class_register(&oprofile_sysclass))) ++ ret = sysdev_register(&device_oprofile); ++ ++ return ret; ++} ++ ++static void exit_driverfs(void) ++{ ++ sysdev_unregister(&device_oprofile); ++ sysdev_class_unregister(&oprofile_sysclass); ++} ++ ++static int pc_create_files(struct super_block *sb, struct dentry *root) ++{ ++ unsigned int i; ++ ++ pr_debug("AVR32 Peformance Counters: create files\n"); ++ for (i = 0; i < pc_model->num_counters; i++) { ++ struct dentry *dir; ++ char buf[2]; ++ ++ snprintf(buf, sizeof buf, "%d", i); ++ dir = oprofilefs_mkdir(sb, root, buf); ++ oprofilefs_create_ulong(sb, dir, "enabled", ++ &counter_config[i].enabled); ++ oprofilefs_create_ulong(sb, dir, "event", ++ &counter_config[i].event); ++ oprofilefs_create_ulong(sb, dir, "count", ++ &counter_config[i].count); ++ oprofilefs_create_ulong(sb, dir, "unit_mask", ++ &counter_config[i].unit_mask); ++ oprofilefs_create_ulong(sb, dir, "kernel", ++ &counter_config[i].kernel); ++ oprofilefs_create_ulong(sb, dir, "user", ++ &counter_config[i].user); ++ } ++ ++ return 0; ++} ++ ++static int pc_setup(void) ++{ ++ int ret; ++ ++ spin_lock(&oprofilefs_lock); ++ pr_debug("AVR32 Peformance Counters: setup\n"); ++ ret = pc_model->setup_ctrs(); ++ spin_unlock(&oprofilefs_lock); ++ return ret; ++} ++ ++static int pc_start(void) ++{ ++ int ret = -EBUSY; ++ ++ down(&pc_sem); ++ if (!pc_enabled) { ++ pr_debug("AVR32 Peformance Counters: start\n"); ++ ret = pc_model->start(); ++ pc_enabled = !ret; ++ } ++ up(&pc_sem); ++ return ret; ++} ++ ++static void pc_stop(void) ++{ ++ down(&pc_sem); ++ pr_debug("AVR32 Peformance Counters: stop\n"); ++ if (pc_enabled) ++ pc_model->stop(); ++ pc_enabled = 0; ++ up(&pc_sem); ++} ++ ++int __init pc_init(struct oprofile_operations *ops, ++ struct op_avr32_model_spec *spec) ++{ ++ init_MUTEX(&pc_sem); ++ ++ if ( spec->init ) ++ if (spec->init() < 0) ++ return -ENODEV; ++ ++ pc_model = spec; ++ init_driverfs(); ++ ops->create_files = pc_create_files; ++ ops->setup = pc_setup; ++ ops->shutdown = pc_stop; ++ ops->start = pc_start; ++ ops->stop = pc_stop; ++ ops->cpu_type = pc_model->name; ++ printk(KERN_INFO "oprofile: using %s Performance Counters\n", ++ spec->name); ++ pr_debug("AVR32 Peformance Counters: pc_init\n"); ++ ++ return 0; ++} ++ ++void pc_exit(void) ++{ ++ if (pc_model) { ++ pr_debug("AVR32 Peformance Counters: exit\n"); ++ exit_driverfs(); ++ pc_model = NULL; ++ } ++} +Index: linux-2.6.18-avr32/arch/avr32/oprofile/init.c +=================================================================== +--- /dev/null 1970-01-01 00:00:00.000000000 +0000 ++++ linux-2.6.18-avr32/arch/avr32/oprofile/init.c 2006-10-20 14:08:20.000000000 +0200 +@@ -0,0 +1,29 @@ ++/* ++ * Copyright (C) 2005-2006 Atmel Corporation ++ * ++ * 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. ++ * ++ * Author: Ronny Pedersen ++ */ ++ ++#include <linux/oprofile.h> ++#include <linux/init.h> ++#include <linux/errno.h> ++#include "op_avr32_model.h" ++#include "op_model_avr32.h" ++ ++int __init oprofile_arch_init(struct oprofile_operations *ops) ++{ ++ int ret = -ENODEV; ++ ++ ret = pc_init(ops, &op_avr32_spec); ++ ++ return ret; ++} ++ ++void oprofile_arch_exit(void) ++{ ++ pc_exit(); ++} +Index: linux-2.6.18-avr32/arch/avr32/oprofile/op_avr32_model.h +=================================================================== +--- /dev/null 1970-01-01 00:00:00.000000000 +0000 ++++ linux-2.6.18-avr32/arch/avr32/oprofile/op_avr32_model.h 2006-10-20 14:08:20.000000000 +0200 +@@ -0,0 +1,25 @@ ++/* ++ * interface to AVR32 machine specific operations ++ * ++ * Copyright (C) 2005-2006 Atmel Corporation ++ * ++ * 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. ++ * ++ * Author: Ronny Pedersen ++ */ ++ ++#ifndef OP_AVR32_MODEL_H ++#define OP_AVR32_MODEL_H ++ ++struct op_avr32_model_spec { ++ int (*init)(void); ++ unsigned int num_counters; ++ int (*setup_ctrs)(void); ++ int (*start)(void); ++ void (*stop)(void); ++ char *name; ++}; ++ ++#endif /* OP_AVR32_MODEL_H */ +Index: linux-2.6.18-avr32/arch/avr32/oprofile/op_counter.h +=================================================================== +--- /dev/null 1970-01-01 00:00:00.000000000 +0000 ++++ linux-2.6.18-avr32/arch/avr32/oprofile/op_counter.h 2006-10-20 14:08:20.000000000 +0200 +@@ -0,0 +1,29 @@ ++/* ++ * Copyright (C) 2005-2006 Atmel Corporation ++ * ++ * 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. ++ * ++ * Author: Ronny Pedersen ++ */ ++#ifndef OP_COUNTER_H ++#define OP_COUNTER_H ++ ++#define OP_MAX_COUNTER 3 ++ ++/* 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 */ +Index: linux-2.6.18-avr32/arch/avr32/oprofile/op_model_avr32.c +=================================================================== +--- /dev/null 1970-01-01 00:00:00.000000000 +0000 ++++ linux-2.6.18-avr32/arch/avr32/oprofile/op_model_avr32.c 2006-10-20 14:08:20.000000000 +0200 +@@ -0,0 +1,219 @@ ++/* ++ * AVR32 Performance Counter Driver ++ * ++ * Copyright (C) 2005-2006 Atmel Corporation ++ * ++ * 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. ++ * ++ * Author: Ronny Pedersen ++ */ ++ ++#define DEBUG ++ ++#include <linux/types.h> ++#include <linux/errno.h> ++#include <linux/sched.h> ++#include <linux/oprofile.h> ++#include <linux/interrupt.h> ++#include <asm/irq.h> ++#include <asm/system.h> ++#include <asm/sysreg.h> ++ ++#include "op_counter.h" ++#include "op_avr32_model.h" ++ ++ ++#define PC_ENABLE 0x001 /* Enable counters */ ++#define PCNT_RESET 0x002 /* Reset event counters */ ++#define CCNT_RESET 0x004 /* Reset clock counter */ ++#define PC_RESET (CCNT_RESET | PCNT_RESET) ++#define PC_CNT64 0x008 /* Make CCNT count every 64th cycle */ ++ ++ ++#define EVT_UNUSED 0xFF ++ ++struct pc_counter { ++ volatile unsigned long ovf; ++ unsigned long reset_counter; ++}; ++ ++enum { PCCNT, PCNT0, PCNT1, MAX_COUNTERS }; ++ ++#define PCCNT_IE (1 << 4) ++#define PCNT0_IE (1 << 5) ++#define PCNT1_IE (1 << 6) ++ ++#define PCCNT_F (1 << 8) ++#define PCNT0_F (1 << 9) ++#define PCNT1_F (1 << 10) ++ ++#define AVR32_PC_IRQ 1 ++ ++static const u32 int_mask[MAX_COUNTERS] = { PCCNT_IE, PCNT0_IE, PCNT1_IE }; ++static const u32 ovf_mask[MAX_COUNTERS] = { PCCNT_F, PCNT0_F, PCNT1_F }; ++ ++static struct pc_counter results[MAX_COUNTERS]; ++ ++static void write_pccr(u32 val) ++{ ++ __builtin_mtsr(SYSREG_PCCR, val); ++} ++ ++static u32 read_pccr(void) ++{ ++ return __builtin_mfsr(SYSREG_PCCR); ++} ++ ++static u32 read_counter(int counter) ++{ ++ switch (counter) { ++ case PCCNT: ++ return __builtin_mfsr(SYSREG_PCCNT); ++ case PCNT0: ++ return __builtin_mfsr(SYSREG_PCNT0); ++ case PCNT1: ++ return __builtin_mfsr(SYSREG_PCNT0); ++ default: ++ return 0; ++ } ++} ++ ++ ++static void write_counter(int counter, u32 val) ++{ ++ switch (counter) { ++ case PCCNT: ++ __builtin_mtsr(SYSREG_PCCNT, val); ++ case PCNT0: ++ __builtin_mtsr(SYSREG_PCNT0, val); ++ case PCNT1: ++ __builtin_mtsr(SYSREG_PCNT0, val); ++ default: ++ break; ++ } ++} ++ ++static int avr32_setup_ctrs(void) ++{ ++ u32 pccr; ++ int i; ++ ++ for (i = PCCNT; i < MAX_COUNTERS; i++) { ++ if (counter_config[i].enabled) ++ continue; ++ ++ counter_config[i].event = EVT_UNUSED; ++ } ++ ++ pccr = ((counter_config[PCNT1].event << 18) ++ | (counter_config[PCNT0].event << 12)); ++ pr_debug("avr32_setup_ctrs: pccr: %#08x\n", pccr); ++ write_pccr(pccr); ++ ++ for (i = PCCNT; i < MAX_COUNTERS; i++) { ++ if (counter_config[i].event == EVT_UNUSED) { ++ counter_config[i].event = 0; ++ continue; ++ } ++ ++ results[i].reset_counter = counter_config[i].count; ++ write_counter(i, -(u32)counter_config[i].count); ++ pr_debug("avr32_setup_ctrs: counter%d %#08x from %#08lx\n", ++ i, read_counter(i), counter_config[i].count); ++ } ++ ++ return 0; ++} ++ ++static void inline check_ctrs(void) ++{ ++ int i; ++ u32 pccr = read_pccr(); ++ ++ /* Writeback clears overflow flag */ ++ write_pccr(pccr & ~PC_ENABLE); ++ ++ for (i = PCCNT; i < MAX_COUNTERS; i++) { ++ if (!(int_mask[i] & pccr)) ++ continue; ++ ++ if (pccr & ovf_mask[i]) ++ results[i].ovf++; ++ } ++} ++ ++ ++static irqreturn_t avr32_pc_interrupt(int irq, void *arg, ++ struct pt_regs *regs) ++{ ++ int i; ++ ++ check_ctrs(); ++ ++ for (i = PCCNT; i < MAX_COUNTERS; i++) { ++ if (!results[i].ovf) ++ continue; ++ ++ write_counter(i, -(u32)results[i].reset_counter); ++ oprofile_add_sample(regs, i); ++ results[i].ovf--; ++ } ++ ++ /* Enable Performance Counter */ ++ write_pccr(read_pccr() | PC_ENABLE); ++ ++ return IRQ_HANDLED; ++} ++ ++static void avr32_pc_stop(void) ++{ ++ write_pccr(read_pccr() & ~PC_ENABLE); ++ ++ free_irq(AVR32_PC_IRQ, results); ++} ++ ++static int avr32_pc_start(void) ++{ ++ int i, ret; ++ u32 pccr = read_pccr(); ++ ++ ret = request_irq(AVR32_PC_IRQ, avr32_pc_interrupt, SA_INTERRUPT, ++ "AVR32 Performance Counter", (void *)results); ++ ++ if (ret < 0) { ++ printk(KERN_ERR ++ "oprofile: unable to request IRQ%d for AVR32" ++ " Performance Counter\n", ++ AVR32_PC_IRQ); ++ return ret; ++ } ++ ++ /* Enable interrupts */ ++ for (i = PCCNT; i < MAX_COUNTERS; i++) { ++ if (counter_config[i].enabled) ++ pccr |= int_mask[i]; ++ } ++ ++ /* Disable scaler */ ++ pccr &= ~PC_CNT64; ++ ++ /* Enable Performance Counter */ ++ pccr |= PC_ENABLE; ++ ++ write_pccr(pccr); ++ pr_debug("avr32_pc_start: pc: %#08x\n", pccr); ++ return 0; ++} ++ ++ ++struct op_avr32_model_spec op_avr32_spec = { ++ .init = 0, ++ .setup_ctrs = avr32_setup_ctrs, ++ .start = avr32_pc_start, ++ .stop = avr32_pc_stop, ++ .num_counters = MAX_COUNTERS, ++ .name = "avr32", ++}; ++ +Index: linux-2.6.18-avr32/arch/avr32/oprofile/op_model_avr32.h +=================================================================== +--- /dev/null 1970-01-01 00:00:00.000000000 +0000 ++++ linux-2.6.18-avr32/arch/avr32/oprofile/op_model_avr32.h 2006-10-20 14:08:20.000000000 +0200 +@@ -0,0 +1,21 @@ ++/** ++ * AVR32 Machine Specific Operations ++ * ++ * Copyright (C) 2005-2006 Atmel Corporation ++ * ++ * 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. ++ * ++ * Author: Ronny Pedersen ++ */ ++#ifndef OP_MODEL_AVR32_H ++#define OP_MODEL_AVR32_H ++ ++extern struct op_avr32_model_spec op_avr32_spec; ++extern int pc_init(struct oprofile_operations *ops, ++ struct op_avr32_model_spec *spec); ++extern void pc_exit(void); ++ ++ ++#endif +Index: linux-2.6.18-avr32/arch/avr32/Kconfig +=================================================================== +--- linux-2.6.18-avr32.orig/arch/avr32/Kconfig 2006-10-20 14:04:43.000000000 +0200 ++++ linux-2.6.18-avr32/arch/avr32/Kconfig 2006-10-20 14:08:20.000000000 +0200 +@@ -190,6 +190,8 @@ source "drivers/Kconfig" + + source "fs/Kconfig" + ++source "arch/avr32/oprofile/Kconfig" ++ + source "arch/avr32/Kconfig.debug" + + source "security/Kconfig" +Index: linux-2.6.18-avr32/arch/avr32/Makefile +=================================================================== +--- linux-2.6.18-avr32.orig/arch/avr32/Makefile 2006-10-20 14:04:54.000000000 +0200 ++++ linux-2.6.18-avr32/arch/avr32/Makefile 2006-10-20 14:09:10.000000000 +0200 +@@ -30,6 +30,7 @@ core-$(CONFIG_BOARD_ATSTK1000) += arch/ + core-$(CONFIG_LOADER_U_BOOT) += arch/avr32/boot/u-boot/ + core-y += arch/avr32/kernel/ + core-y += arch/avr32/mm/ ++drivers-$(CONFIG_OPROFILE) += arch/avr32/oprofile/ + libs-y += arch/avr32/lib/ + + archincdir-$(CONFIG_PLATFORM_AT32AP) := arch-at32ap |