aboutsummaryrefslogtreecommitdiffstats
path: root/arch/mips/oprofile/common.c
blob: b6e378211a2c940021fb2e7befb342b90b1b1777 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
/*
 * 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/compiler.h>
#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_ops __weak;
extern struct op_mips_model op_model_rm9000_ops __weak;
extern struct op_mips_model op_model_loongson2_ops __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, NULL, 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[4];

		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, 1);

	return 0;
}

static void op_mips_stop(void)
{
	/* Disable performance monitoring for all counters.  */
	on_each_cpu(model->cpu_stop, NULL, 1);
}

int __init oprofile_arch_init(struct oprofile_operations *ops)
{
	struct op_mips_model *lmodel = NULL;
	int res;

	switch (current_cpu_type()) {
	case CPU_5KC:
	case CPU_M14KC:
	case CPU_20KC:
	case CPU_24K:
	case CPU_25KF:
	case CPU_34K:
	case CPU_1004K:
	case CPU_74K:
	case CPU_SB1:
	case CPU_SB1A:
	case CPU_R10000:
	case CPU_R12000:
	case CPU_R14000:
		lmodel = &op_model_mipsxx_ops;
		break;

	case CPU_RM9000:
		lmodel = &op_model_rm9000_ops;
		break;
	case CPU_LOONGSON2:
		lmodel = &op_model_loongson2_ops;
		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;
	ops->backtrace		= op_mips_backtrace;

	printk(KERN_INFO "oprofile: using %s performance monitoring.\n",
	       lmodel->cpu_type);

	return 0;
}

void oprofile_arch_exit(void)
{
	if (model)
		model->exit();
}