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> | |
86a5cddb SR |
17 | #ifndef __powerpc64__ |
18 | #include <linux/slab.h> | |
19 | #endif /* ! __powerpc64__ */ | |
1da177e4 LT |
20 | #include <linux/init.h> |
21 | #include <linux/smp.h> | |
22 | #include <linux/errno.h> | |
23 | #include <asm/ptrace.h> | |
24 | #include <asm/system.h> | |
86a5cddb | 25 | #ifdef __powerpc64__ |
1da177e4 | 26 | #include <asm/pmc.h> |
86a5cddb SR |
27 | #else /* __powerpc64__ */ |
28 | #include <asm/perfmon.h> | |
29 | #endif /* __powerpc64__ */ | |
a6908cd0 | 30 | #include <asm/cputable.h> |
dca85932 | 31 | #include <asm/oprofile_impl.h> |
1da177e4 | 32 | |
a3e48c10 | 33 | static struct op_powerpc_model *model; |
1da177e4 LT |
34 | |
35 | static struct op_counter_config ctr[OP_MAX_COUNTER]; | |
36 | static struct op_system_config sys; | |
37 | ||
86a5cddb SR |
38 | #ifndef __powerpc64__ |
39 | static char *cpu_type; | |
40 | #endif /* ! __powerpc64__ */ | |
41 | ||
1da177e4 LT |
42 | static void op_handle_interrupt(struct pt_regs *regs) |
43 | { | |
44 | model->handle_interrupt(regs, ctr); | |
45 | } | |
46 | ||
86a5cddb | 47 | static int op_powerpc_setup(void) |
1da177e4 LT |
48 | { |
49 | int err; | |
50 | ||
51 | /* Grab the hardware */ | |
52 | err = reserve_pmc_hardware(op_handle_interrupt); | |
53 | if (err) | |
54 | return err; | |
55 | ||
56 | /* Pre-compute the values to stuff in the hardware registers. */ | |
57 | model->reg_setup(ctr, &sys, model->num_counters); | |
58 | ||
59 | /* Configure the registers on all cpus. */ | |
86a5cddb | 60 | #ifdef __powerpc64__ |
1da177e4 | 61 | on_each_cpu(model->cpu_setup, NULL, 0, 1); |
86a5cddb SR |
62 | #else /* __powerpc64__ */ |
63 | #if 0 | |
64 | /* FIXME: Make multi-cpu work */ | |
65 | on_each_cpu(model->reg_setup, NULL, 0, 1); | |
66 | #endif | |
67 | #endif /* __powerpc64__ */ | |
1da177e4 LT |
68 | |
69 | return 0; | |
70 | } | |
71 | ||
86a5cddb | 72 | static void op_powerpc_shutdown(void) |
1da177e4 LT |
73 | { |
74 | release_pmc_hardware(); | |
75 | } | |
76 | ||
86a5cddb | 77 | static void op_powerpc_cpu_start(void *dummy) |
1da177e4 LT |
78 | { |
79 | model->start(ctr); | |
80 | } | |
81 | ||
86a5cddb | 82 | static int op_powerpc_start(void) |
1da177e4 | 83 | { |
86a5cddb | 84 | on_each_cpu(op_powerpc_cpu_start, NULL, 0, 1); |
1da177e4 LT |
85 | return 0; |
86 | } | |
87 | ||
86a5cddb | 88 | static inline void op_powerpc_cpu_stop(void *dummy) |
1da177e4 LT |
89 | { |
90 | model->stop(); | |
91 | } | |
92 | ||
86a5cddb | 93 | static void op_powerpc_stop(void) |
1da177e4 | 94 | { |
86a5cddb | 95 | on_each_cpu(op_powerpc_cpu_stop, NULL, 0, 1); |
1da177e4 LT |
96 | } |
97 | ||
86a5cddb | 98 | static int op_powerpc_create_files(struct super_block *sb, struct dentry *root) |
1da177e4 LT |
99 | { |
100 | int i; | |
101 | ||
86a5cddb | 102 | #ifdef __powerpc64__ |
1da177e4 LT |
103 | /* |
104 | * There is one mmcr0, mmcr1 and mmcra for setting the events for | |
105 | * all of the counters. | |
106 | */ | |
107 | oprofilefs_create_ulong(sb, root, "mmcr0", &sys.mmcr0); | |
108 | oprofilefs_create_ulong(sb, root, "mmcr1", &sys.mmcr1); | |
109 | oprofilefs_create_ulong(sb, root, "mmcra", &sys.mmcra); | |
86a5cddb | 110 | #endif /* __powerpc64__ */ |
1da177e4 LT |
111 | |
112 | for (i = 0; i < model->num_counters; ++i) { | |
113 | struct dentry *dir; | |
114 | char buf[3]; | |
115 | ||
116 | snprintf(buf, sizeof buf, "%d", i); | |
117 | dir = oprofilefs_mkdir(sb, root, buf); | |
118 | ||
119 | oprofilefs_create_ulong(sb, dir, "enabled", &ctr[i].enabled); | |
120 | oprofilefs_create_ulong(sb, dir, "event", &ctr[i].event); | |
121 | oprofilefs_create_ulong(sb, dir, "count", &ctr[i].count); | |
86a5cddb | 122 | #ifdef __powerpc64__ |
1da177e4 LT |
123 | /* |
124 | * We dont support per counter user/kernel selection, but | |
125 | * we leave the entries because userspace expects them | |
126 | */ | |
86a5cddb | 127 | #endif /* __powerpc64__ */ |
1da177e4 LT |
128 | oprofilefs_create_ulong(sb, dir, "kernel", &ctr[i].kernel); |
129 | oprofilefs_create_ulong(sb, dir, "user", &ctr[i].user); | |
86a5cddb SR |
130 | |
131 | #ifndef __powerpc64__ | |
132 | /* FIXME: Not sure if this is used */ | |
133 | #endif /* ! __powerpc64__ */ | |
1da177e4 LT |
134 | oprofilefs_create_ulong(sb, dir, "unit_mask", &ctr[i].unit_mask); |
135 | } | |
136 | ||
137 | oprofilefs_create_ulong(sb, root, "enable_kernel", &sys.enable_kernel); | |
138 | oprofilefs_create_ulong(sb, root, "enable_user", &sys.enable_user); | |
86a5cddb | 139 | #ifdef __powerpc64__ |
1da177e4 LT |
140 | oprofilefs_create_ulong(sb, root, "backtrace_spinlocks", |
141 | &sys.backtrace_spinlocks); | |
86a5cddb | 142 | #endif /* __powerpc64__ */ |
1da177e4 LT |
143 | |
144 | /* Default to tracing both kernel and user */ | |
145 | sys.enable_kernel = 1; | |
146 | sys.enable_user = 1; | |
86a5cddb | 147 | #ifdef __powerpc64__ |
1da177e4 LT |
148 | /* Turn on backtracing through spinlocks by default */ |
149 | sys.backtrace_spinlocks = 1; | |
86a5cddb | 150 | #endif /* __powerpc64__ */ |
1da177e4 LT |
151 | |
152 | return 0; | |
153 | } | |
154 | ||
155 | int __init oprofile_arch_init(struct oprofile_operations *ops) | |
156 | { | |
86a5cddb SR |
157 | #ifndef __powerpc64__ |
158 | int cpu_id = smp_processor_id(); | |
159 | ||
160 | #ifdef CONFIG_FSL_BOOKE | |
161 | model = &op_model_fsl_booke; | |
162 | #else | |
163 | return -ENODEV; | |
164 | #endif | |
165 | ||
166 | cpu_type = kmalloc(32, GFP_KERNEL); | |
167 | if (NULL == cpu_type) | |
168 | return -ENOMEM; | |
169 | ||
170 | sprintf(cpu_type, "ppc/%s", cur_cpu_spec[cpu_id]->cpu_name); | |
171 | ||
172 | model->num_counters = cur_cpu_spec[cpu_id]->num_pmcs; | |
173 | ||
174 | ops->cpu_type = cpu_type; | |
175 | #else /* __powerpc64__ */ | |
8fef0306 AB |
176 | if (!cur_cpu_spec->oprofile_model || !cur_cpu_spec->oprofile_cpu_type) |
177 | return -ENODEV; | |
8fef0306 | 178 | model = cur_cpu_spec->oprofile_model; |
a6908cd0 | 179 | model->num_counters = cur_cpu_spec->num_pmcs; |
8fef0306 AB |
180 | |
181 | ops->cpu_type = cur_cpu_spec->oprofile_cpu_type; | |
86a5cddb SR |
182 | #endif /* __powerpc64__ */ |
183 | ops->create_files = op_powerpc_create_files; | |
184 | ops->setup = op_powerpc_setup; | |
185 | ops->shutdown = op_powerpc_shutdown; | |
186 | ops->start = op_powerpc_start; | |
187 | ops->stop = op_powerpc_stop; | |
1da177e4 LT |
188 | |
189 | printk(KERN_INFO "oprofile: using %s performance monitoring.\n", | |
190 | ops->cpu_type); | |
191 | ||
192 | return 0; | |
193 | } | |
194 | ||
195 | void oprofile_arch_exit(void) | |
196 | { | |
86a5cddb SR |
197 | #ifndef __powerpc64__ |
198 | kfree(cpu_type); | |
199 | cpu_type = NULL; | |
200 | #endif /* ! __powerpc64__ */ | |
1da177e4 | 201 | } |