1 /*
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
4 * for more details.
5 *
6 * Copyright (C) 2004, 2005 Ralf Baechle
7 * Copyright (C) 2005 MIPS Technologies, Inc.
8 */
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
16 #include "op_impl.h"
17
18 extern struct op_mips_model op_model_mipsxx_ops __weak;
19 extern struct op_mips_model op_model_rm9000_ops __weak;
20 extern struct op_mips_model op_model_loongson2_ops __weak;
21
22 static struct op_mips_model *model;
23
24 static struct op_counter_config ctr[20];
25
op_mips_setup(void)26 static int op_mips_setup(void)
27 {
28 /* Pre-compute the values to stuff in the hardware registers. */
29 model->reg_setup(ctr);
30
31 /* Configure the registers on all cpus. */
32 on_each_cpu(model->cpu_setup, NULL, 1);
33
34 return 0;
35 }
36
op_mips_create_files(struct super_block * sb,struct dentry * root)37 static int op_mips_create_files(struct super_block *sb, struct dentry *root)
38 {
39 int i;
40
41 for (i = 0; i < model->num_counters; ++i) {
42 struct dentry *dir;
43 char buf[4];
44
45 snprintf(buf, sizeof buf, "%d", i);
46 dir = oprofilefs_mkdir(sb, root, buf);
47
48 oprofilefs_create_ulong(sb, dir, "enabled", &ctr[i].enabled);
49 oprofilefs_create_ulong(sb, dir, "event", &ctr[i].event);
50 oprofilefs_create_ulong(sb, dir, "count", &ctr[i].count);
51 oprofilefs_create_ulong(sb, dir, "kernel", &ctr[i].kernel);
52 oprofilefs_create_ulong(sb, dir, "user", &ctr[i].user);
53 oprofilefs_create_ulong(sb, dir, "exl", &ctr[i].exl);
54 /* Dummy. */
55 oprofilefs_create_ulong(sb, dir, "unit_mask", &ctr[i].unit_mask);
56 }
57
58 return 0;
59 }
60
op_mips_start(void)61 static int op_mips_start(void)
62 {
63 on_each_cpu(model->cpu_start, NULL, 1);
64
65 return 0;
66 }
67
op_mips_stop(void)68 static void op_mips_stop(void)
69 {
70 /* Disable performance monitoring for all counters. */
71 on_each_cpu(model->cpu_stop, NULL, 1);
72 }
73
oprofile_arch_init(struct oprofile_operations * ops)74 int __init oprofile_arch_init(struct oprofile_operations *ops)
75 {
76 struct op_mips_model *lmodel = NULL;
77 int res;
78
79 switch (current_cpu_type()) {
80 case CPU_5KC:
81 case CPU_20KC:
82 case CPU_24K:
83 case CPU_25KF:
84 case CPU_34K:
85 case CPU_1004K:
86 case CPU_74K:
87 case CPU_SB1:
88 case CPU_SB1A:
89 case CPU_R10000:
90 case CPU_R12000:
91 case CPU_R14000:
92 lmodel = &op_model_mipsxx_ops;
93 break;
94
95 case CPU_RM9000:
96 lmodel = &op_model_rm9000_ops;
97 break;
98 case CPU_LOONGSON2:
99 lmodel = &op_model_loongson2_ops;
100 break;
101 };
102
103 if (!lmodel)
104 return -ENODEV;
105
106 res = lmodel->init();
107 if (res)
108 return res;
109
110 model = lmodel;
111
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;
119
120 printk(KERN_INFO "oprofile: using %s performance monitoring.\n",
121 lmodel->cpu_type);
122
123 return 0;
124 }
125
oprofile_arch_exit(void)126 void oprofile_arch_exit(void)
127 {
128 if (model)
129 model->exit();
130 }
131