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>
18 extern struct op_mips_model op_model_mipsxx_ops __weak;
19 extern struct op_mips_model op_model_loongson2_ops __weak;
21 static struct op_mips_model *model;
23 static struct op_counter_config ctr[20];
25 static int op_mips_setup(void)
27 /* Pre-compute the values to stuff in the hardware registers. */
28 model->reg_setup(ctr);
30 /* Configure the registers on all cpus. */
31 on_each_cpu(model->cpu_setup, NULL, 1);
36 static int op_mips_create_files(struct dentry *root)
40 for (i = 0; i < model->num_counters; ++i) {
44 snprintf(buf, sizeof buf, "%d", i);
45 dir = oprofilefs_mkdir(root, buf);
47 oprofilefs_create_ulong(dir, "enabled", &ctr[i].enabled);
48 oprofilefs_create_ulong(dir, "event", &ctr[i].event);
49 oprofilefs_create_ulong(dir, "count", &ctr[i].count);
50 oprofilefs_create_ulong(dir, "kernel", &ctr[i].kernel);
51 oprofilefs_create_ulong(dir, "user", &ctr[i].user);
52 oprofilefs_create_ulong(dir, "exl", &ctr[i].exl);
54 oprofilefs_create_ulong(dir, "unit_mask", &ctr[i].unit_mask);
60 static int op_mips_start(void)
62 on_each_cpu(model->cpu_start, NULL, 1);
67 static void op_mips_stop(void)
69 /* Disable performance monitoring for all counters. */
70 on_each_cpu(model->cpu_stop, NULL, 1);
73 int __init oprofile_arch_init(struct oprofile_operations *ops)
75 struct op_mips_model *lmodel = NULL;
78 switch (current_cpu_type()) {
95 lmodel = &op_model_mipsxx_ops;
99 lmodel = &op_model_loongson2_ops;
106 res = lmodel->init();
112 ops->create_files = op_mips_create_files;
113 ops->setup = op_mips_setup;
114 //ops->shutdown = op_mips_shutdown;
115 ops->start = op_mips_start;
116 ops->stop = op_mips_stop;
117 ops->cpu_type = lmodel->cpu_type;
118 ops->backtrace = op_mips_backtrace;
120 printk(KERN_INFO "oprofile: using %s performance monitoring.\n",
126 void oprofile_arch_exit(void)