tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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#include <asm/cpu-type.h>
16
17#include "op_impl.h"
18
19extern struct op_mips_model op_model_mipsxx_ops __weak;
20extern struct op_mips_model op_model_loongson2_ops __weak;
21
22static struct op_mips_model *model;
23
24static struct op_counter_config ctr[20];
25
26static 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
37static int op_mips_create_files(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(root, buf);
47
48 oprofilefs_create_ulong(dir, "enabled", &ctr[i].enabled);
49 oprofilefs_create_ulong(dir, "event", &ctr[i].event);
50 oprofilefs_create_ulong(dir, "count", &ctr[i].count);
51 oprofilefs_create_ulong(dir, "kernel", &ctr[i].kernel);
52 oprofilefs_create_ulong(dir, "user", &ctr[i].user);
53 oprofilefs_create_ulong(dir, "exl", &ctr[i].exl);
54 /* Dummy. */
55 oprofilefs_create_ulong(dir, "unit_mask", &ctr[i].unit_mask);
56 }
57
58 return 0;
59}
60
61static int op_mips_start(void)
62{
63 on_each_cpu(model->cpu_start, NULL, 1);
64
65 return 0;
66}
67
68static void op_mips_stop(void)
69{
70 /* Disable performance monitoring for all counters. */
71 on_each_cpu(model->cpu_stop, NULL, 1);
72}
73
74int __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_M14KC:
82 case CPU_M14KEC:
83 case CPU_20KC:
84 case CPU_24K:
85 case CPU_25KF:
86 case CPU_34K:
87 case CPU_1004K:
88 case CPU_74K:
89 case CPU_1074K:
90 case CPU_INTERAPTIV:
91 case CPU_PROAPTIV:
92 case CPU_P5600:
93 case CPU_M5150:
94 case CPU_LOONGSON1:
95 case CPU_SB1:
96 case CPU_SB1A:
97 case CPU_R10000:
98 case CPU_R12000:
99 case CPU_R14000:
100 case CPU_XLR:
101 lmodel = &op_model_mipsxx_ops;
102 break;
103
104 case CPU_LOONGSON2:
105 lmodel = &op_model_loongson2_ops;
106 break;
107 };
108
109 if (!lmodel)
110 return -ENODEV;
111
112 res = lmodel->init();
113 if (res)
114 return res;
115
116 model = lmodel;
117
118 ops->create_files = op_mips_create_files;
119 ops->setup = op_mips_setup;
120 //ops->shutdown = op_mips_shutdown;
121 ops->start = op_mips_start;
122 ops->stop = op_mips_stop;
123 ops->cpu_type = lmodel->cpu_type;
124 ops->backtrace = op_mips_backtrace;
125
126 printk(KERN_INFO "oprofile: using %s performance monitoring.\n",
127 lmodel->cpu_type);
128
129 return 0;
130}
131
132void oprofile_arch_exit(void)
133{
134 if (model)
135 model->exit();
136}