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Commit | Line | Data |
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1da177e4 | 1 | /* |
86a5cddb | 2 | * PPC 64 oprofile support: |
1da177e4 | 3 | * Copyright (C) 2004 Anton Blanchard <anton@au.ibm.com>, IBM |
86a5cddb SR |
4 | * PPC 32 oprofile support: (based on PPC 64 support) |
5 | * Copyright (C) Freescale Semiconductor, Inc 2004 | |
6 | * Author: Andy Fleming | |
1da177e4 LT |
7 | * |
8 | * Based on alpha version. | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or | |
11 | * modify it under the terms of the GNU General Public License | |
12 | * as published by the Free Software Foundation; either version | |
13 | * 2 of the License, or (at your option) any later version. | |
14 | */ | |
15 | ||
16 | #include <linux/oprofile.h> | |
17 | #include <linux/init.h> | |
18 | #include <linux/smp.h> | |
19 | #include <linux/errno.h> | |
20 | #include <asm/ptrace.h> | |
1da177e4 | 21 | #include <asm/pmc.h> |
a6908cd0 | 22 | #include <asm/cputable.h> |
dca85932 | 23 | #include <asm/oprofile_impl.h> |
2191fe3e | 24 | #include <asm/firmware.h> |
1da177e4 | 25 | |
a3e48c10 | 26 | static struct op_powerpc_model *model; |
1da177e4 LT |
27 | |
28 | static struct op_counter_config ctr[OP_MAX_COUNTER]; | |
29 | static struct op_system_config sys; | |
30 | ||
1474855d BN |
31 | static int op_per_cpu_rc; |
32 | ||
1da177e4 LT |
33 | static void op_handle_interrupt(struct pt_regs *regs) |
34 | { | |
35 | model->handle_interrupt(regs, ctr); | |
36 | } | |
37 | ||
dd6c89f6 AF |
38 | static void op_powerpc_cpu_setup(void *dummy) |
39 | { | |
1474855d BN |
40 | int ret; |
41 | ||
42 | ret = model->cpu_setup(ctr); | |
43 | ||
44 | if (ret != 0) | |
45 | op_per_cpu_rc = ret; | |
dd6c89f6 AF |
46 | } |
47 | ||
86a5cddb | 48 | static int op_powerpc_setup(void) |
1da177e4 LT |
49 | { |
50 | int err; | |
51 | ||
1474855d BN |
52 | op_per_cpu_rc = 0; |
53 | ||
1da177e4 LT |
54 | /* Grab the hardware */ |
55 | err = reserve_pmc_hardware(op_handle_interrupt); | |
56 | if (err) | |
57 | return err; | |
58 | ||
59 | /* Pre-compute the values to stuff in the hardware registers. */ | |
1474855d | 60 | op_per_cpu_rc = model->reg_setup(ctr, &sys, model->num_counters); |
1da177e4 | 61 | |
1474855d BN |
62 | if (op_per_cpu_rc) |
63 | goto out; | |
64 | ||
65 | /* Configure the registers on all cpus. If an error occurs on one | |
66 | * of the cpus, op_per_cpu_rc will be set to the error */ | |
15c8b6c1 | 67 | on_each_cpu(op_powerpc_cpu_setup, NULL, 1); |
1da177e4 | 68 | |
1474855d BN |
69 | out: if (op_per_cpu_rc) { |
70 | /* error on setup release the performance counter hardware */ | |
71 | release_pmc_hardware(); | |
72 | } | |
73 | ||
74 | return op_per_cpu_rc; | |
1da177e4 LT |
75 | } |
76 | ||
86a5cddb | 77 | static void op_powerpc_shutdown(void) |
1da177e4 LT |
78 | { |
79 | release_pmc_hardware(); | |
80 | } | |
81 | ||
86a5cddb | 82 | static void op_powerpc_cpu_start(void *dummy) |
1da177e4 | 83 | { |
1474855d BN |
84 | /* If any of the cpus have return an error, set the |
85 | * global flag to the error so it can be returned | |
86 | * to the generic OProfile caller. | |
87 | */ | |
88 | int ret; | |
89 | ||
90 | ret = model->start(ctr); | |
91 | if (ret != 0) | |
92 | op_per_cpu_rc = ret; | |
1da177e4 LT |
93 | } |
94 | ||
86a5cddb | 95 | static int op_powerpc_start(void) |
1da177e4 | 96 | { |
1474855d BN |
97 | op_per_cpu_rc = 0; |
98 | ||
18f2190d | 99 | if (model->global_start) |
1474855d BN |
100 | return model->global_start(ctr); |
101 | if (model->start) { | |
15c8b6c1 | 102 | on_each_cpu(op_powerpc_cpu_start, NULL, 1); |
1474855d BN |
103 | return op_per_cpu_rc; |
104 | } | |
105 | return -EIO; /* No start function is defined for this | |
106 | power architecture */ | |
1da177e4 LT |
107 | } |
108 | ||
86a5cddb | 109 | static inline void op_powerpc_cpu_stop(void *dummy) |
1da177e4 LT |
110 | { |
111 | model->stop(); | |
112 | } | |
113 | ||
86a5cddb | 114 | static void op_powerpc_stop(void) |
1da177e4 | 115 | { |
18f2190d | 116 | if (model->stop) |
15c8b6c1 | 117 | on_each_cpu(op_powerpc_cpu_stop, NULL, 1); |
18f2190d MJ |
118 | if (model->global_stop) |
119 | model->global_stop(); | |
1da177e4 LT |
120 | } |
121 | ||
ef7bca14 | 122 | static int op_powerpc_create_files(struct dentry *root) |
1da177e4 LT |
123 | { |
124 | int i; | |
125 | ||
555d97ac | 126 | #ifdef CONFIG_PPC64 |
1da177e4 LT |
127 | /* |
128 | * There is one mmcr0, mmcr1 and mmcra for setting the events for | |
129 | * all of the counters. | |
130 | */ | |
6af4ea0b AV |
131 | oprofilefs_create_ulong(root, "mmcr0", &sys.mmcr0); |
132 | oprofilefs_create_ulong(root, "mmcr1", &sys.mmcr1); | |
133 | oprofilefs_create_ulong(root, "mmcra", &sys.mmcra); | |
88382329 CL |
134 | #ifdef CONFIG_OPROFILE_CELL |
135 | /* create a file the user tool can check to see what level of profiling | |
136 | * support exits with this kernel. Initialize bit mask to indicate | |
137 | * what support the kernel has: | |
138 | * bit 0 - Supports SPU event profiling in addition to PPU | |
139 | * event and cycles; and SPU cycle profiling | |
140 | * bits 1-31 - Currently unused. | |
141 | * | |
142 | * If the file does not exist, then the kernel only supports SPU | |
143 | * cycle profiling, PPU event and cycle profiling. | |
144 | */ | |
6af4ea0b | 145 | oprofilefs_create_ulong(root, "cell_support", &sys.cell_support); |
88382329 CL |
146 | sys.cell_support = 0x1; /* Note, the user OProfile tool must check |
147 | * that this bit is set before attempting to | |
148 | * user SPU event profiling. Older kernels | |
149 | * will not have this file, hence the user | |
150 | * tool is not allowed to do SPU event | |
151 | * profiling on older kernels. Older kernels | |
152 | * will accept SPU events but collected data | |
153 | * is garbage. | |
154 | */ | |
155 | #endif | |
555d97ac | 156 | #endif |
1da177e4 LT |
157 | |
158 | for (i = 0; i < model->num_counters; ++i) { | |
159 | struct dentry *dir; | |
0c6856f7 | 160 | char buf[4]; |
1da177e4 LT |
161 | |
162 | snprintf(buf, sizeof buf, "%d", i); | |
ecde2823 | 163 | dir = oprofilefs_mkdir(root, buf); |
1da177e4 | 164 | |
6af4ea0b AV |
165 | oprofilefs_create_ulong(dir, "enabled", &ctr[i].enabled); |
166 | oprofilefs_create_ulong(dir, "event", &ctr[i].event); | |
167 | oprofilefs_create_ulong(dir, "count", &ctr[i].count); | |
555d97ac | 168 | |
1da177e4 | 169 | /* |
555d97ac AF |
170 | * Classic PowerPC doesn't support per-counter |
171 | * control like this, but the options are | |
172 | * expected, so they remain. For Freescale | |
173 | * Book-E style performance monitors, we do | |
174 | * support them. | |
1da177e4 | 175 | */ |
6af4ea0b AV |
176 | oprofilefs_create_ulong(dir, "kernel", &ctr[i].kernel); |
177 | oprofilefs_create_ulong(dir, "user", &ctr[i].user); | |
86a5cddb | 178 | |
6af4ea0b | 179 | oprofilefs_create_ulong(dir, "unit_mask", &ctr[i].unit_mask); |
1da177e4 LT |
180 | } |
181 | ||
6af4ea0b AV |
182 | oprofilefs_create_ulong(root, "enable_kernel", &sys.enable_kernel); |
183 | oprofilefs_create_ulong(root, "enable_user", &sys.enable_user); | |
1da177e4 LT |
184 | |
185 | /* Default to tracing both kernel and user */ | |
186 | sys.enable_kernel = 1; | |
187 | sys.enable_user = 1; | |
1da177e4 LT |
188 | |
189 | return 0; | |
190 | } | |
191 | ||
192 | int __init oprofile_arch_init(struct oprofile_operations *ops) | |
193 | { | |
32a33994 | 194 | if (!cur_cpu_spec->oprofile_cpu_type) |
8fef0306 | 195 | return -ENODEV; |
32a33994 AB |
196 | |
197 | switch (cur_cpu_spec->oprofile_type) { | |
1caca371 | 198 | #ifdef CONFIG_PPC_BOOK3S_64 |
1474855d | 199 | #ifdef CONFIG_OPROFILE_CELL |
18f2190d | 200 | case PPC_OPROFILE_CELL: |
ef66f796 IK |
201 | if (firmware_has_feature(FW_FEATURE_LPAR)) |
202 | return -ENODEV; | |
18f2190d | 203 | model = &op_model_cell; |
1474855d BN |
204 | ops->sync_start = model->sync_start; |
205 | ops->sync_stop = model->sync_stop; | |
18f2190d MJ |
206 | break; |
207 | #endif | |
7a45fb19 | 208 | case PPC_OPROFILE_POWER4: |
32a33994 AB |
209 | model = &op_model_power4; |
210 | break; | |
25fc530e OJ |
211 | case PPC_OPROFILE_PA6T: |
212 | model = &op_model_pa6t; | |
213 | break; | |
dd6c89f6 AF |
214 | #endif |
215 | #ifdef CONFIG_6xx | |
7a45fb19 | 216 | case PPC_OPROFILE_G4: |
32a33994 AB |
217 | model = &op_model_7450; |
218 | break; | |
219 | #endif | |
39aef685 AF |
220 | #if defined(CONFIG_FSL_EMB_PERFMON) |
221 | case PPC_OPROFILE_FSL_EMB: | |
222 | model = &op_model_fsl_emb; | |
32a33994 AB |
223 | break; |
224 | #endif | |
225 | default: | |
226 | return -ENODEV; | |
227 | } | |
228 | ||
a6908cd0 | 229 | model->num_counters = cur_cpu_spec->num_pmcs; |
8fef0306 AB |
230 | |
231 | ops->cpu_type = cur_cpu_spec->oprofile_cpu_type; | |
86a5cddb SR |
232 | ops->create_files = op_powerpc_create_files; |
233 | ops->setup = op_powerpc_setup; | |
234 | ops->shutdown = op_powerpc_shutdown; | |
235 | ops->start = op_powerpc_start; | |
236 | ops->stop = op_powerpc_stop; | |
6c6bd754 | 237 | ops->backtrace = op_powerpc_backtrace; |
1da177e4 | 238 | |
5e1415c3 | 239 | printk(KERN_DEBUG "oprofile: using %s performance monitoring.\n", |
1da177e4 LT |
240 | ops->cpu_type); |
241 | ||
242 | return 0; | |
243 | } | |
244 | ||
245 | void oprofile_arch_exit(void) | |
246 | { | |
247 | } |