/* * This file is subject to the terms and conditions of the GNU General Public * License. See the file "COPYING" in the main directory of this archive * for more details. * * Copyright (C) 2004, 2005 Ralf Baechle * Copyright (C) 2005 MIPS Technologies, Inc. */ #include <linux/errno.h> #include <linux/init.h> #include <linux/oprofile.h> #include <linux/smp.h> #include <asm/cpu-info.h> #include "op_impl.h" extern struct op_mips_model op_model_mipsxx __attribute__((weak)); extern struct op_mips_model op_model_rm9000 __attribute__((weak)); static struct op_mips_model *model; static struct op_counter_config ctr[20]; static int op_mips_setup(void) { /* Pre-compute the values to stuff in the hardware registers. */ model->reg_setup(ctr); /* Configure the registers on all cpus. */ on_each_cpu(model->cpu_setup, 0, 0, 1); return 0; } static int op_mips_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); oprofilefs_create_ulong(sb, dir, "exl", &ctr[i].exl); /* Dummy. */ oprofilefs_create_ulong(sb, dir, "unit_mask", &ctr[i].unit_mask); } return 0; } static int op_mips_start(void) { on_each_cpu(model->cpu_start, NULL, 0, 1); return 0; } static void op_mips_stop(void) { /* Disable performance monitoring for all counters. */ on_each_cpu(model->cpu_stop, NULL, 0, 1); } int __init oprofile_arch_init(struct oprofile_operations *ops) { struct op_mips_model *lmodel = NULL; int res; switch (current_cpu_data.cputype) { case CPU_24K: lmodel = &op_model_mipsxx; break; case CPU_RM9000: lmodel = &op_model_rm9000; break; }; if (!lmodel) return -ENODEV; res = lmodel->init(); if (res) return res; model = lmodel; ops->create_files = op_mips_create_files; ops->setup = op_mips_setup; //ops->shutdown = op_mips_shutdown; ops->start = op_mips_start; ops->stop = op_mips_stop; ops->cpu_type = lmodel->cpu_type; printk(KERN_INFO "oprofile: using %s performance monitoring.\n", lmodel->cpu_type); return 0; } void oprofile_arch_exit(void) { model->exit(); }