2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
6 * Copyright (C) 2004, 2005 Ralf Baechle
7 * Copyright (C) 2005 MIPS Technologies, Inc.
9 #include <linux/compiler.h>
10 #include <linux/errno.h>
11 #include <linux/init.h>
12 #include <linux/oprofile.h>
13 #include <linux/smp.h>
14 #include <asm/cpu-info.h>
15 #include <asm/cpu-type.h>
19 extern struct op_mips_model op_model_mipsxx_ops __weak;
20 extern struct op_mips_model op_model_loongson2_ops __weak;
21 extern struct op_mips_model op_model_loongson3_ops __weak;
23 static struct op_mips_model *model;
25 static struct op_counter_config ctr[20];
27 static int op_mips_setup(void)
29 /* Pre-compute the values to stuff in the hardware registers. */
30 model->reg_setup(ctr);
32 /* Configure the registers on all cpus. */
33 on_each_cpu(model->cpu_setup, NULL, 1);
38 static int op_mips_create_files(struct dentry *root)
42 for (i = 0; i < model->num_counters; ++i) {
46 snprintf(buf, sizeof buf, "%d", i);
47 dir = oprofilefs_mkdir(root, buf);
49 oprofilefs_create_ulong(dir, "enabled", &ctr[i].enabled);
50 oprofilefs_create_ulong(dir, "event", &ctr[i].event);
51 oprofilefs_create_ulong(dir, "count", &ctr[i].count);
52 oprofilefs_create_ulong(dir, "kernel", &ctr[i].kernel);
53 oprofilefs_create_ulong(dir, "user", &ctr[i].user);
54 oprofilefs_create_ulong(dir, "exl", &ctr[i].exl);
56 oprofilefs_create_ulong(dir, "unit_mask", &ctr[i].unit_mask);
62 static int op_mips_start(void)
64 on_each_cpu(model->cpu_start, NULL, 1);
69 static void op_mips_stop(void)
71 /* Disable performance monitoring for all counters. */
72 on_each_cpu(model->cpu_stop, NULL, 1);
75 int __init oprofile_arch_init(struct oprofile_operations *ops)
77 struct op_mips_model *lmodel = NULL;
80 switch (boot_cpu_type()) {
104 lmodel = &op_model_mipsxx_ops;
108 lmodel = &op_model_loongson2_ops;
111 lmodel = &op_model_loongson3_ops;
116 * Always set the backtrace. This allows unsupported CPU types to still
117 * use timer-based oprofile.
119 ops->backtrace = op_mips_backtrace;
124 res = lmodel->init();
130 ops->create_files = op_mips_create_files;
131 ops->setup = op_mips_setup;
132 //ops->shutdown = op_mips_shutdown;
133 ops->start = op_mips_start;
134 ops->stop = op_mips_stop;
135 ops->cpu_type = lmodel->cpu_type;
137 printk(KERN_INFO "oprofile: using %s performance monitoring.\n",
143 void oprofile_arch_exit(void)