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
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
|
/*
* PPC 32 oprofile support
* Based on PPC64 oprofile support
* Copyright (C) 2004 Anton Blanchard <anton@au.ibm.com>, IBM
*
* Copyright (C) Freescale Semiconductor, Inc 2004
*
* Author: Andy Fleming
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#include <linux/oprofile.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/smp.h>
#include <linux/errno.h>
#include <asm/ptrace.h>
#include <asm/system.h>
#include <asm/perfmon.h>
#include <asm/cputable.h>
#include "op_impl.h"
static struct op_ppc32_model *model;
static struct op_counter_config ctr[OP_MAX_COUNTER];
static struct op_system_config sys;
static void op_handle_interrupt(struct pt_regs *regs)
{
model->handle_interrupt(regs, ctr);
}
static int op_ppc32_setup(void)
{
/* Install our interrupt handler into the existing hook. */
if(request_perfmon_irq(&op_handle_interrupt))
return -EBUSY;
mb();
/* Pre-compute the values to stuff in the hardware registers. */
model->reg_setup(ctr, &sys, model->num_counters);
#if 0
/* FIXME: Make multi-cpu work */
/* Configure the registers on all cpus. */
on_each_cpu(model->reg_setup, NULL, 0, 1);
#endif
return 0;
}
static void op_ppc32_shutdown(void)
{
mb();
/* Remove our interrupt handler. We may be removing this module. */
free_perfmon_irq();
}
static void op_ppc32_cpu_start(void *dummy)
{
model->start(ctr);
}
static int op_ppc32_start(void)
{
on_each_cpu(op_ppc32_cpu_start, NULL, 0, 1);
return 0;
}
static inline void op_ppc32_cpu_stop(void *dummy)
{
model->stop();
}
static void op_ppc32_stop(void)
{
on_each_cpu(op_ppc32_cpu_stop, NULL, 0, 1);
}
static int op_ppc32_create_files(struct super_block *sb, struct dentry *root)
{
int i;
for (i = 0; i < model->num_counters; ++i) {
struct dentry *dir;
char buf[3];
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);
/* FIXME: Not sure if this is used */
oprofilefs_create_ulong(sb, dir, "unit_mask", &ctr[i].unit_mask);
}
oprofilefs_create_ulong(sb, root, "enable_kernel", &sys.enable_kernel);
oprofilefs_create_ulong(sb, root, "enable_user", &sys.enable_user);
/* Default to tracing both kernel and user */
sys.enable_kernel = 1;
sys.enable_user = 1;
return 0;
}
static struct oprofile_operations oprof_ppc32_ops = {
.create_files = op_ppc32_create_files,
.setup = op_ppc32_setup,
.shutdown = op_ppc32_shutdown,
.start = op_ppc32_start,
.stop = op_ppc32_stop,
.cpu_type = NULL /* To be filled in below. */
};
int __init oprofile_arch_init(struct oprofile_operations *ops)
{
char *name;
int cpu_id = smp_processor_id();
#ifdef CONFIG_FSL_BOOKE
model = &op_model_fsl_booke;
#else
return -ENODEV;
#endif
name = kmalloc(32, GFP_KERNEL);
if (NULL == name)
return -ENOMEM;
sprintf(name, "ppc/%s", cur_cpu_spec[cpu_id]->cpu_name);
oprof_ppc32_ops.cpu_type = name;
model->num_counters = cur_cpu_spec[cpu_id]->num_pmcs;
*ops = oprof_ppc32_ops;
printk(KERN_INFO "oprofile: using %s performance monitoring.\n",
oprof_ppc32_ops.cpu_type);
return 0;
}
void oprofile_arch_exit(void)
{
kfree(oprof_ppc32_ops.cpu_type);
oprof_ppc32_ops.cpu_type = NULL;
}
|
