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60a51fbe PM |
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 | ||
23 | extern struct op_sh_model op_model_sh7750_ops __weak; | |
24 | extern struct op_sh_model op_model_sh4a_ops __weak; | |
25 | ||
26 | static struct op_sh_model *model; | |
27 | ||
28 | static struct op_counter_config ctr[20]; | |
29 | ||
30 | static int op_sh_setup(void) | |
31 | { | |
32 | /* Pre-compute the values to stuff in the hardware registers. */ | |
33 | model->reg_setup(ctr); | |
34 | ||
35 | /* Configure the registers on all cpus. */ | |
36 | on_each_cpu(model->cpu_setup, NULL, 1); | |
37 | ||
38 | return 0; | |
39 | } | |
40 | ||
41 | static int op_sh_create_files(struct super_block *sb, struct dentry *root) | |
42 | { | |
43 | int i, ret = 0; | |
44 | ||
45 | for (i = 0; i < model->num_counters; i++) { | |
46 | struct dentry *dir; | |
47 | char buf[4]; | |
48 | ||
49 | snprintf(buf, sizeof(buf), "%d", i); | |
50 | dir = oprofilefs_mkdir(sb, root, buf); | |
51 | ||
52 | ret |= oprofilefs_create_ulong(sb, dir, "enabled", &ctr[i].enabled); | |
53 | ret |= oprofilefs_create_ulong(sb, dir, "event", &ctr[i].event); | |
54 | ret |= oprofilefs_create_ulong(sb, dir, "kernel", &ctr[i].kernel); | |
55 | ret |= oprofilefs_create_ulong(sb, dir, "user", &ctr[i].user); | |
56 | ||
57 | if (model->create_files) | |
58 | ret |= model->create_files(sb, dir); | |
59 | else | |
60 | ret |= oprofilefs_create_ulong(sb, dir, "count", &ctr[i].count); | |
61 | ||
62 | /* Dummy entries */ | |
63 | ret |= oprofilefs_create_ulong(sb, dir, "unit_mask", &ctr[i].unit_mask); | |
64 | } | |
65 | ||
66 | return ret; | |
67 | } | |
68 | ||
69 | static int op_sh_start(void) | |
70 | { | |
71 | /* Enable performance monitoring for all counters. */ | |
72 | on_each_cpu(model->cpu_start, NULL, 1); | |
73 | ||
74 | return 0; | |
75 | } | |
76 | ||
77 | static void op_sh_stop(void) | |
78 | { | |
79 | /* Disable performance monitoring for all counters. */ | |
80 | on_each_cpu(model->cpu_stop, NULL, 1); | |
81 | } | |
82 | ||
83 | int __init oprofile_arch_init(struct oprofile_operations *ops) | |
84 | { | |
85 | struct op_sh_model *lmodel = NULL; | |
86 | int ret; | |
87 | ||
88 | switch (current_cpu_data.type) { | |
89 | /* SH-4 types */ | |
90 | case CPU_SH7750: | |
91 | case CPU_SH7750S: | |
92 | lmodel = &op_model_sh7750_ops; | |
93 | break; | |
94 | ||
95 | /* SH-4A types */ | |
96 | case CPU_SH7763: | |
97 | case CPU_SH7770: | |
98 | case CPU_SH7780: | |
99 | case CPU_SH7781: | |
100 | case CPU_SH7785: | |
101 | case CPU_SH7723: | |
102 | case CPU_SHX3: | |
103 | lmodel = &op_model_sh4a_ops; | |
104 | break; | |
105 | ||
106 | /* SH4AL-DSP types */ | |
107 | case CPU_SH7343: | |
108 | case CPU_SH7722: | |
109 | case CPU_SH7366: | |
110 | lmodel = &op_model_sh4a_ops; | |
111 | break; | |
112 | } | |
113 | ||
114 | if (!lmodel) | |
115 | return -ENODEV; | |
116 | if (!(current_cpu_data.flags & CPU_HAS_PERF_COUNTER)) | |
117 | return -ENODEV; | |
118 | ||
119 | ret = lmodel->init(); | |
120 | if (unlikely(ret != 0)) | |
121 | return ret; | |
122 | ||
123 | model = lmodel; | |
124 | ||
125 | ops->setup = op_sh_setup; | |
126 | ops->create_files = op_sh_create_files; | |
127 | ops->start = op_sh_start; | |
128 | ops->stop = op_sh_stop; | |
129 | ops->cpu_type = lmodel->cpu_type; | |
130 | ||
131 | printk(KERN_INFO "oprofile: using %s performance monitoring.\n", | |
132 | lmodel->cpu_type); | |
133 | ||
134 | return 0; | |
135 | } | |
136 | ||
137 | void oprofile_arch_exit(void) | |
138 | { | |
139 | if (model && model->exit) | |
140 | model->exit(); | |
141 | } |