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review.trustedfirmware.org / hafnium / third_party / linux / 0e64123141f3854e695eb4924d82b52856691466 / . / arch / mips / oprofile / common.c
blob: 2f33992f6dff00dbf54321a5f00089e73acd14e5 [file] [log] [blame]
Andrew Scullb4b6d4a2019-01-02 15:54:55 +0000[diff] [blame]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;
21extern struct op_mips_model op_model_loongson3_ops __weak;
22
23static struct op_mips_model *model;
24
25static struct op_counter_config ctr[20];
26
27static int op_mips_setup(void)
28{
29 /* Pre-compute the values to stuff in the hardware registers. */
30 model->reg_setup(ctr);
31
32 /* Configure the registers on all cpus. */
33 on_each_cpu(model->cpu_setup, NULL, 1);
34
35 return 0;
36}
37
38static int op_mips_create_files(struct dentry *root)
39{
40 int i;
41
42 for (i = 0; i < model->num_counters; ++i) {
43 struct dentry *dir;
44 char buf[4];
45
46 snprintf(buf, sizeof buf, "%d", i);
47 dir = oprofilefs_mkdir(root, buf);
48
49 oprofilefs_create_ulong(dir, "enabled", &ctr[i].enabled);
50 oprofilefs_create_ulong(dir, "event", &ctr[i].event);
51 oprofilefs_create_ulong(dir, "count", &ctr[i].count);
52 oprofilefs_create_ulong(dir, "kernel", &ctr[i].kernel);
53 oprofilefs_create_ulong(dir, "user", &ctr[i].user);
54 oprofilefs_create_ulong(dir, "exl", &ctr[i].exl);
55 /* Dummy. */
56 oprofilefs_create_ulong(dir, "unit_mask", &ctr[i].unit_mask);
57 }
58
59 return 0;
60}
61
62static int op_mips_start(void)
63{
64 on_each_cpu(model->cpu_start, NULL, 1);
65
66 return 0;
67}
68
69static void op_mips_stop(void)
70{
71 /* Disable performance monitoring for all counters. */
72 on_each_cpu(model->cpu_stop, NULL, 1);
73}
74
75int __init oprofile_arch_init(struct oprofile_operations *ops)
76{
77 struct op_mips_model *lmodel = NULL;
78 int res;
79
80 switch (boot_cpu_type()) {
81 case CPU_5KC:
82 case CPU_M14KC:
83 case CPU_M14KEC:
84 case CPU_20KC:
85 case CPU_24K:
86 case CPU_25KF:
87 case CPU_34K:
88 case CPU_1004K:
89 case CPU_74K:
90 case CPU_1074K:
91 case CPU_INTERAPTIV:
92 case CPU_PROAPTIV:
93 case CPU_P5600:
94 case CPU_I6400:
95 case CPU_M5150:
96 case CPU_LOONGSON1:
97 case CPU_SB1:
98 case CPU_SB1A:
99 case CPU_R10000:
100 case CPU_R12000:
101 case CPU_R14000:
102 case CPU_R16000:
103 case CPU_XLR:
104 lmodel = &op_model_mipsxx_ops;
105 break;
106
107 case CPU_LOONGSON2:
108 lmodel = &op_model_loongson2_ops;
109 break;
110 case CPU_LOONGSON3:
111 lmodel = &op_model_loongson3_ops;
112 break;
113 };
114
115 /*
116 * Always set the backtrace. This allows unsupported CPU types to still
117 * use timer-based oprofile.
118 */
119 ops->backtrace = op_mips_backtrace;
120
121 if (!lmodel)
122 return -ENODEV;
123
124 res = lmodel->init();
125 if (res)
126 return res;
127
128 model = lmodel;
129
130 ops->create_files = op_mips_create_files;
131 ops->setup = op_mips_setup;
132 //ops->shutdown = op_mips_shutdown;
133 ops->start = op_mips_start;
134 ops->stop = op_mips_stop;
135 ops->cpu_type = lmodel->cpu_type;
136
137 printk(KERN_INFO "oprofile: using %s performance monitoring.\n",
138 lmodel->cpu_type);
139
140 return 0;
141}
142
143void oprofile_arch_exit(void)
144{
145 if (model)
146 model->exit();
147}