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> | |
21 | #include <asm/system.h> | |
22 | #include <asm/pmc.h> | |
a6908cd0 | 23 | #include <asm/cputable.h> |
dca85932 | 24 | #include <asm/oprofile_impl.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 | ||
31 | static void op_handle_interrupt(struct pt_regs *regs) | |
32 | { | |
33 | model->handle_interrupt(regs, ctr); | |
34 | } | |
35 | ||
86a5cddb | 36 | static int op_powerpc_setup(void) |
1da177e4 LT |
37 | { |
38 | int err; | |
39 | ||
40 | /* Grab the hardware */ | |
41 | err = reserve_pmc_hardware(op_handle_interrupt); | |
42 | if (err) | |
43 | return err; | |
44 | ||
45 | /* Pre-compute the values to stuff in the hardware registers. */ | |
46 | model->reg_setup(ctr, &sys, model->num_counters); | |
47 | ||
48 | /* Configure the registers on all cpus. */ | |
49 | on_each_cpu(model->cpu_setup, NULL, 0, 1); | |
50 | ||
51 | return 0; | |
52 | } | |
53 | ||
86a5cddb | 54 | static void op_powerpc_shutdown(void) |
1da177e4 LT |
55 | { |
56 | release_pmc_hardware(); | |
57 | } | |
58 | ||
86a5cddb | 59 | static void op_powerpc_cpu_start(void *dummy) |
1da177e4 LT |
60 | { |
61 | model->start(ctr); | |
62 | } | |
63 | ||
86a5cddb | 64 | static int op_powerpc_start(void) |
1da177e4 | 65 | { |
86a5cddb | 66 | on_each_cpu(op_powerpc_cpu_start, NULL, 0, 1); |
1da177e4 LT |
67 | return 0; |
68 | } | |
69 | ||
86a5cddb | 70 | static inline void op_powerpc_cpu_stop(void *dummy) |
1da177e4 LT |
71 | { |
72 | model->stop(); | |
73 | } | |
74 | ||
86a5cddb | 75 | static void op_powerpc_stop(void) |
1da177e4 | 76 | { |
86a5cddb | 77 | on_each_cpu(op_powerpc_cpu_stop, NULL, 0, 1); |
1da177e4 LT |
78 | } |
79 | ||
86a5cddb | 80 | static int op_powerpc_create_files(struct super_block *sb, struct dentry *root) |
1da177e4 LT |
81 | { |
82 | int i; | |
83 | ||
555d97ac | 84 | #ifdef CONFIG_PPC64 |
1da177e4 LT |
85 | /* |
86 | * There is one mmcr0, mmcr1 and mmcra for setting the events for | |
87 | * all of the counters. | |
88 | */ | |
89 | oprofilefs_create_ulong(sb, root, "mmcr0", &sys.mmcr0); | |
90 | oprofilefs_create_ulong(sb, root, "mmcr1", &sys.mmcr1); | |
91 | oprofilefs_create_ulong(sb, root, "mmcra", &sys.mmcra); | |
555d97ac | 92 | #endif |
1da177e4 LT |
93 | |
94 | for (i = 0; i < model->num_counters; ++i) { | |
95 | struct dentry *dir; | |
96 | char buf[3]; | |
97 | ||
98 | snprintf(buf, sizeof buf, "%d", i); | |
99 | dir = oprofilefs_mkdir(sb, root, buf); | |
100 | ||
101 | oprofilefs_create_ulong(sb, dir, "enabled", &ctr[i].enabled); | |
102 | oprofilefs_create_ulong(sb, dir, "event", &ctr[i].event); | |
103 | oprofilefs_create_ulong(sb, dir, "count", &ctr[i].count); | |
555d97ac | 104 | |
1da177e4 | 105 | /* |
555d97ac AF |
106 | * Classic PowerPC doesn't support per-counter |
107 | * control like this, but the options are | |
108 | * expected, so they remain. For Freescale | |
109 | * Book-E style performance monitors, we do | |
110 | * support them. | |
1da177e4 LT |
111 | */ |
112 | oprofilefs_create_ulong(sb, dir, "kernel", &ctr[i].kernel); | |
113 | oprofilefs_create_ulong(sb, dir, "user", &ctr[i].user); | |
86a5cddb | 114 | |
1da177e4 LT |
115 | oprofilefs_create_ulong(sb, dir, "unit_mask", &ctr[i].unit_mask); |
116 | } | |
117 | ||
118 | oprofilefs_create_ulong(sb, root, "enable_kernel", &sys.enable_kernel); | |
119 | oprofilefs_create_ulong(sb, root, "enable_user", &sys.enable_user); | |
555d97ac | 120 | #ifdef CONFIG_PPC64 |
1da177e4 LT |
121 | oprofilefs_create_ulong(sb, root, "backtrace_spinlocks", |
122 | &sys.backtrace_spinlocks); | |
555d97ac | 123 | #endif |
1da177e4 LT |
124 | |
125 | /* Default to tracing both kernel and user */ | |
126 | sys.enable_kernel = 1; | |
127 | sys.enable_user = 1; | |
555d97ac | 128 | #ifdef CONFIG_PPC64 |
1da177e4 LT |
129 | /* Turn on backtracing through spinlocks by default */ |
130 | sys.backtrace_spinlocks = 1; | |
555d97ac | 131 | #endif |
1da177e4 LT |
132 | |
133 | return 0; | |
134 | } | |
135 | ||
136 | int __init oprofile_arch_init(struct oprofile_operations *ops) | |
137 | { | |
8fef0306 AB |
138 | if (!cur_cpu_spec->oprofile_model || !cur_cpu_spec->oprofile_cpu_type) |
139 | return -ENODEV; | |
8fef0306 | 140 | model = cur_cpu_spec->oprofile_model; |
a6908cd0 | 141 | model->num_counters = cur_cpu_spec->num_pmcs; |
8fef0306 AB |
142 | |
143 | ops->cpu_type = cur_cpu_spec->oprofile_cpu_type; | |
86a5cddb SR |
144 | ops->create_files = op_powerpc_create_files; |
145 | ops->setup = op_powerpc_setup; | |
146 | ops->shutdown = op_powerpc_shutdown; | |
147 | ops->start = op_powerpc_start; | |
148 | ops->stop = op_powerpc_stop; | |
1da177e4 LT |
149 | |
150 | printk(KERN_INFO "oprofile: using %s performance monitoring.\n", | |
151 | ops->cpu_type); | |
152 | ||
153 | return 0; | |
154 | } | |
155 | ||
156 | void oprofile_arch_exit(void) | |
157 | { | |
158 | } |