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gerrit-public.fairphone.software / kernel / msm-5.4 / fb8a1f11b64e213d94dfa1cebb2a42a7b8c115c4 / . / arch / sh / oprofile / common.c
blob: 1d97d64cb95fa68cfece09c0d6abec4c97890c16 [file] [log] [blame]
Paul Mundt60a51fb2008-12-16 09:33:53 +0900[diff] [blame]1/*
2 * arch/sh/oprofile/init.c
3 *
4 * Copyright (C) 2003 - 2008 Paul Mundt
5 *
6 * Based on arch/mips/oprofile/common.c:
7 *
8 * Copyright (C) 2004, 2005 Ralf Baechle
9 * Copyright (C) 2005 MIPS Technologies, Inc.
10 *
11 * This file is subject to the terms and conditions of the GNU General Public
12 * License. See the file "COPYING" in the main directory of this archive
13 * for more details.
14 */
15#include <linux/kernel.h>
16#include <linux/oprofile.h>
17#include <linux/init.h>
18#include <linux/errno.h>
19#include <linux/smp.h>
20#include <asm/processor.h>
21#include "op_impl.h"
22
23extern struct op_sh_model op_model_sh7750_ops __weak;
24extern struct op_sh_model op_model_sh4a_ops __weak;
25
26static struct op_sh_model *model;
27
28static struct op_counter_config ctr[20];
29
Dave Peverley40a8b422008-12-16 09:35:40 +0900[diff] [blame]30extern void sh_backtrace(struct pt_regs * const regs, unsigned int depth);
31
Paul Mundt60a51fb2008-12-16 09:33:53 +0900[diff] [blame]32static int op_sh_setup(void)
33{
34 /* Pre-compute the values to stuff in the hardware registers. */
35 model->reg_setup(ctr);
36
37 /* Configure the registers on all cpus. */
38 on_each_cpu(model->cpu_setup, NULL, 1);
39
40 return 0;
41}
42
43static int op_sh_create_files(struct super_block *sb, struct dentry *root)
44{
45 int i, ret = 0;
46
47 for (i = 0; i < model->num_counters; i++) {
48 struct dentry *dir;
49 char buf[4];
50
51 snprintf(buf, sizeof(buf), "%d", i);
52 dir = oprofilefs_mkdir(sb, root, buf);
53
54 ret |= oprofilefs_create_ulong(sb, dir, "enabled", &ctr[i].enabled);
55 ret |= oprofilefs_create_ulong(sb, dir, "event", &ctr[i].event);
56 ret |= oprofilefs_create_ulong(sb, dir, "kernel", &ctr[i].kernel);
57 ret |= oprofilefs_create_ulong(sb, dir, "user", &ctr[i].user);
58
59 if (model->create_files)
60 ret |= model->create_files(sb, dir);
61 else
62 ret |= oprofilefs_create_ulong(sb, dir, "count", &ctr[i].count);
63
64 /* Dummy entries */
65 ret |= oprofilefs_create_ulong(sb, dir, "unit_mask", &ctr[i].unit_mask);
66 }
67
68 return ret;
69}
70
71static int op_sh_start(void)
72{
73 /* Enable performance monitoring for all counters. */
74 on_each_cpu(model->cpu_start, NULL, 1);
75
76 return 0;
77}
78
79static void op_sh_stop(void)
80{
81 /* Disable performance monitoring for all counters. */
82 on_each_cpu(model->cpu_stop, NULL, 1);
83}
84
85int __init oprofile_arch_init(struct oprofile_operations *ops)
86{
87 struct op_sh_model *lmodel = NULL;
88 int ret;
89
Dave Peverley40a8b422008-12-16 09:35:40 +0900[diff] [blame]90 /*
91 * Always assign the backtrace op. If the counter initialization
92 * fails, we fall back to the timer which will still make use of
93 * this.
94 */
95 ops->backtrace = sh_backtrace;
96
Paul Mundt60a51fb2008-12-16 09:33:53 +0900[diff] [blame]97 switch (current_cpu_data.type) {
98 /* SH-4 types */
99 case CPU_SH7750:
100 case CPU_SH7750S:
101 lmodel = &op_model_sh7750_ops;
102 break;
103
104 /* SH-4A types */
105 case CPU_SH7763:
106 case CPU_SH7770:
107 case CPU_SH7780:
108 case CPU_SH7781:
109 case CPU_SH7785:
110 case CPU_SH7723:
111 case CPU_SHX3:
112 lmodel = &op_model_sh4a_ops;
113 break;
114
115 /* SH4AL-DSP types */
116 case CPU_SH7343:
117 case CPU_SH7722:
118 case CPU_SH7366:
119 lmodel = &op_model_sh4a_ops;
120 break;
121 }
122
123 if (!lmodel)
124 return -ENODEV;
125 if (!(current_cpu_data.flags & CPU_HAS_PERF_COUNTER))
126 return -ENODEV;
127
128 ret = lmodel->init();
129 if (unlikely(ret != 0))
130 return ret;
131
132 model = lmodel;
133
134 ops->setup = op_sh_setup;
135 ops->create_files = op_sh_create_files;
136 ops->start = op_sh_start;
137 ops->stop = op_sh_stop;
138 ops->cpu_type = lmodel->cpu_type;
139
140 printk(KERN_INFO "oprofile: using %s performance monitoring.\n",
141 lmodel->cpu_type);
142
143 return 0;
144}
145
146void oprofile_arch_exit(void)
147{
148 if (model && model->exit)
149 model->exit();
150}