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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 | /* * PPC 32 oprofile support * Based on PPC64 oprofile support * Copyright (C) 2004 Anton Blanchard <anton@au.ibm.com>, IBM * * Copyright (C) Freescale Semiconductor, Inc 2004 * * Author: Andy Fleming * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. */ #include <linux/oprofile.h> #include <linux/slab.h> #include <linux/init.h> #include <linux/smp.h> #include <linux/errno.h> #include <asm/ptrace.h> #include <asm/system.h> #include <asm/perfmon.h> #include <asm/cputable.h> #include "op_impl.h" static struct op_ppc32_model *model; static struct op_counter_config ctr[OP_MAX_COUNTER]; static struct op_system_config sys; static void op_handle_interrupt(struct pt_regs *regs) { model->handle_interrupt(regs, ctr); } static int op_ppc32_setup(void) { /* Install our interrupt handler into the existing hook. */ if(request_perfmon_irq(&op_handle_interrupt)) return -EBUSY; mb(); /* Pre-compute the values to stuff in the hardware registers. */ model->reg_setup(ctr, &sys, model->num_counters); #if 0 /* FIXME: Make multi-cpu work */ /* Configure the registers on all cpus. */ on_each_cpu(model->reg_setup, NULL, 0, 1); #endif return 0; } static void op_ppc32_shutdown(void) { mb(); /* Remove our interrupt handler. We may be removing this module. */ free_perfmon_irq(); } static void op_ppc32_cpu_start(void *dummy) { model->start(ctr); } static int op_ppc32_start(void) { on_each_cpu(op_ppc32_cpu_start, NULL, 0, 1); return 0; } static inline void op_ppc32_cpu_stop(void *dummy) { model->stop(); } static void op_ppc32_stop(void) { on_each_cpu(op_ppc32_cpu_stop, NULL, 0, 1); } static int op_ppc32_create_files(struct super_block *sb, struct dentry *root) { int i; for (i = 0; i < model->num_counters; ++i) { struct dentry *dir; char buf[3]; snprintf(buf, sizeof buf, "%d", i); dir = oprofilefs_mkdir(sb, root, buf); oprofilefs_create_ulong(sb, dir, "enabled", &ctr[i].enabled); oprofilefs_create_ulong(sb, dir, "event", &ctr[i].event); oprofilefs_create_ulong(sb, dir, "count", &ctr[i].count); oprofilefs_create_ulong(sb, dir, "kernel", &ctr[i].kernel); oprofilefs_create_ulong(sb, dir, "user", &ctr[i].user); /* FIXME: Not sure if this is used */ oprofilefs_create_ulong(sb, dir, "unit_mask", &ctr[i].unit_mask); } oprofilefs_create_ulong(sb, root, "enable_kernel", &sys.enable_kernel); oprofilefs_create_ulong(sb, root, "enable_user", &sys.enable_user); /* Default to tracing both kernel and user */ sys.enable_kernel = 1; sys.enable_user = 1; return 0; } static struct oprofile_operations oprof_ppc32_ops = { .create_files = op_ppc32_create_files, .setup = op_ppc32_setup, .shutdown = op_ppc32_shutdown, .start = op_ppc32_start, .stop = op_ppc32_stop, .cpu_type = NULL /* To be filled in below. */ }; int __init oprofile_arch_init(struct oprofile_operations *ops) { char *name; int cpu_id = smp_processor_id(); #ifdef CONFIG_FSL_BOOKE model = &op_model_fsl_booke; #else return -ENODEV; #endif name = kmalloc(32, GFP_KERNEL); if (NULL == name) return -ENOMEM; sprintf(name, "ppc/%s", cur_cpu_spec[cpu_id]->cpu_name); oprof_ppc32_ops.cpu_type = name; model->num_counters = cur_cpu_spec[cpu_id]->num_pmcs; *ops = oprof_ppc32_ops; printk(KERN_INFO "oprofile: using %s performance monitoring.\n", oprof_ppc32_ops.cpu_type); return 0; } void oprofile_arch_exit(void) { kfree(oprof_ppc32_ops.cpu_type); oprof_ppc32_ops.cpu_type = NULL; } |