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1da177e4 LT |
1 | /* |
2 | * Copyright (C) 2004 Anton Blanchard <anton@au.ibm.com>, IBM | |
3 | * | |
4 | * Based on alpha version. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License | |
8 | * as published by the Free Software Foundation; either version | |
9 | * 2 of the License, or (at your option) any later version. | |
10 | */ | |
11 | ||
12 | #include <linux/oprofile.h> | |
13 | #include <linux/init.h> | |
14 | #include <linux/smp.h> | |
15 | #include <linux/errno.h> | |
16 | #include <asm/ptrace.h> | |
17 | #include <asm/system.h> | |
18 | #include <asm/pmc.h> | |
19 | ||
20 | #include "op_impl.h" | |
21 | ||
22 | extern struct op_ppc64_model op_model_rs64; | |
23 | extern struct op_ppc64_model op_model_power4; | |
24 | static struct op_ppc64_model *model; | |
25 | ||
26 | static struct op_counter_config ctr[OP_MAX_COUNTER]; | |
27 | static struct op_system_config sys; | |
28 | ||
29 | static void op_handle_interrupt(struct pt_regs *regs) | |
30 | { | |
31 | model->handle_interrupt(regs, ctr); | |
32 | } | |
33 | ||
34 | static int op_ppc64_setup(void) | |
35 | { | |
36 | int err; | |
37 | ||
38 | /* Grab the hardware */ | |
39 | err = reserve_pmc_hardware(op_handle_interrupt); | |
40 | if (err) | |
41 | return err; | |
42 | ||
43 | /* Pre-compute the values to stuff in the hardware registers. */ | |
44 | model->reg_setup(ctr, &sys, model->num_counters); | |
45 | ||
46 | /* Configure the registers on all cpus. */ | |
47 | on_each_cpu(model->cpu_setup, NULL, 0, 1); | |
48 | ||
49 | return 0; | |
50 | } | |
51 | ||
52 | static void op_ppc64_shutdown(void) | |
53 | { | |
54 | release_pmc_hardware(); | |
55 | } | |
56 | ||
57 | static void op_ppc64_cpu_start(void *dummy) | |
58 | { | |
59 | model->start(ctr); | |
60 | } | |
61 | ||
62 | static int op_ppc64_start(void) | |
63 | { | |
64 | on_each_cpu(op_ppc64_cpu_start, NULL, 0, 1); | |
65 | return 0; | |
66 | } | |
67 | ||
68 | static inline void op_ppc64_cpu_stop(void *dummy) | |
69 | { | |
70 | model->stop(); | |
71 | } | |
72 | ||
73 | static void op_ppc64_stop(void) | |
74 | { | |
75 | on_each_cpu(op_ppc64_cpu_stop, NULL, 0, 1); | |
76 | } | |
77 | ||
78 | static int op_ppc64_create_files(struct super_block *sb, struct dentry *root) | |
79 | { | |
80 | int i; | |
81 | ||
82 | /* | |
83 | * There is one mmcr0, mmcr1 and mmcra for setting the events for | |
84 | * all of the counters. | |
85 | */ | |
86 | oprofilefs_create_ulong(sb, root, "mmcr0", &sys.mmcr0); | |
87 | oprofilefs_create_ulong(sb, root, "mmcr1", &sys.mmcr1); | |
88 | oprofilefs_create_ulong(sb, root, "mmcra", &sys.mmcra); | |
89 | ||
90 | for (i = 0; i < model->num_counters; ++i) { | |
91 | struct dentry *dir; | |
92 | char buf[3]; | |
93 | ||
94 | snprintf(buf, sizeof buf, "%d", i); | |
95 | dir = oprofilefs_mkdir(sb, root, buf); | |
96 | ||
97 | oprofilefs_create_ulong(sb, dir, "enabled", &ctr[i].enabled); | |
98 | oprofilefs_create_ulong(sb, dir, "event", &ctr[i].event); | |
99 | oprofilefs_create_ulong(sb, dir, "count", &ctr[i].count); | |
100 | /* | |
101 | * We dont support per counter user/kernel selection, but | |
102 | * we leave the entries because userspace expects them | |
103 | */ | |
104 | oprofilefs_create_ulong(sb, dir, "kernel", &ctr[i].kernel); | |
105 | oprofilefs_create_ulong(sb, dir, "user", &ctr[i].user); | |
106 | oprofilefs_create_ulong(sb, dir, "unit_mask", &ctr[i].unit_mask); | |
107 | } | |
108 | ||
109 | oprofilefs_create_ulong(sb, root, "enable_kernel", &sys.enable_kernel); | |
110 | oprofilefs_create_ulong(sb, root, "enable_user", &sys.enable_user); | |
111 | oprofilefs_create_ulong(sb, root, "backtrace_spinlocks", | |
112 | &sys.backtrace_spinlocks); | |
113 | ||
114 | /* Default to tracing both kernel and user */ | |
115 | sys.enable_kernel = 1; | |
116 | sys.enable_user = 1; | |
117 | ||
118 | /* Turn on backtracing through spinlocks by default */ | |
119 | sys.backtrace_spinlocks = 1; | |
120 | ||
121 | return 0; | |
122 | } | |
123 | ||
124 | int __init oprofile_arch_init(struct oprofile_operations *ops) | |
125 | { | |
126 | unsigned int pvr; | |
127 | ||
128 | pvr = mfspr(SPRN_PVR); | |
129 | ||
130 | switch (PVR_VER(pvr)) { | |
131 | case PV_630: | |
132 | case PV_630p: | |
133 | model = &op_model_rs64; | |
134 | model->num_counters = 8; | |
135 | ops->cpu_type = "ppc64/power3"; | |
136 | break; | |
137 | ||
138 | case PV_NORTHSTAR: | |
139 | case PV_PULSAR: | |
140 | case PV_ICESTAR: | |
141 | case PV_SSTAR: | |
142 | model = &op_model_rs64; | |
143 | model->num_counters = 8; | |
144 | ops->cpu_type = "ppc64/rs64"; | |
145 | break; | |
146 | ||
147 | case PV_POWER4: | |
148 | case PV_POWER4p: | |
149 | model = &op_model_power4; | |
150 | model->num_counters = 8; | |
151 | ops->cpu_type = "ppc64/power4"; | |
152 | break; | |
153 | ||
154 | case PV_970: | |
155 | case PV_970FX: | |
156 | model = &op_model_power4; | |
157 | model->num_counters = 8; | |
158 | ops->cpu_type = "ppc64/970"; | |
159 | break; | |
160 | ||
161 | case PV_POWER5: | |
162 | case PV_POWER5p: | |
163 | model = &op_model_power4; | |
164 | model->num_counters = 6; | |
165 | ops->cpu_type = "ppc64/power5"; | |
166 | break; | |
167 | ||
168 | default: | |
169 | return -ENODEV; | |
170 | } | |
171 | ||
172 | ops->create_files = op_ppc64_create_files; | |
173 | ops->setup = op_ppc64_setup; | |
174 | ops->shutdown = op_ppc64_shutdown; | |
175 | ops->start = op_ppc64_start; | |
176 | ops->stop = op_ppc64_stop; | |
177 | ||
178 | printk(KERN_INFO "oprofile: using %s performance monitoring.\n", | |
179 | ops->cpu_type); | |
180 | ||
181 | return 0; | |
182 | } | |
183 | ||
184 | void oprofile_arch_exit(void) | |
185 | { | |
186 | } |