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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> | |
a6908cd0 | 19 | #include <asm/cputable.h> |
dca85932 | 20 | #include <asm/oprofile_impl.h> |
1da177e4 | 21 | |
a3e48c10 | 22 | static struct op_powerpc_model *model; |
1da177e4 LT |
23 | |
24 | static struct op_counter_config ctr[OP_MAX_COUNTER]; | |
25 | static struct op_system_config sys; | |
26 | ||
27 | static void op_handle_interrupt(struct pt_regs *regs) | |
28 | { | |
29 | model->handle_interrupt(regs, ctr); | |
30 | } | |
31 | ||
32 | static int op_ppc64_setup(void) | |
33 | { | |
34 | int err; | |
35 | ||
36 | /* Grab the hardware */ | |
37 | err = reserve_pmc_hardware(op_handle_interrupt); | |
38 | if (err) | |
39 | return err; | |
40 | ||
41 | /* Pre-compute the values to stuff in the hardware registers. */ | |
42 | model->reg_setup(ctr, &sys, model->num_counters); | |
43 | ||
44 | /* Configure the registers on all cpus. */ | |
45 | on_each_cpu(model->cpu_setup, NULL, 0, 1); | |
46 | ||
47 | return 0; | |
48 | } | |
49 | ||
50 | static void op_ppc64_shutdown(void) | |
51 | { | |
52 | release_pmc_hardware(); | |
53 | } | |
54 | ||
55 | static void op_ppc64_cpu_start(void *dummy) | |
56 | { | |
57 | model->start(ctr); | |
58 | } | |
59 | ||
60 | static int op_ppc64_start(void) | |
61 | { | |
62 | on_each_cpu(op_ppc64_cpu_start, NULL, 0, 1); | |
63 | return 0; | |
64 | } | |
65 | ||
66 | static inline void op_ppc64_cpu_stop(void *dummy) | |
67 | { | |
68 | model->stop(); | |
69 | } | |
70 | ||
71 | static void op_ppc64_stop(void) | |
72 | { | |
73 | on_each_cpu(op_ppc64_cpu_stop, NULL, 0, 1); | |
74 | } | |
75 | ||
76 | static int op_ppc64_create_files(struct super_block *sb, struct dentry *root) | |
77 | { | |
78 | int i; | |
79 | ||
80 | /* | |
81 | * There is one mmcr0, mmcr1 and mmcra for setting the events for | |
82 | * all of the counters. | |
83 | */ | |
84 | oprofilefs_create_ulong(sb, root, "mmcr0", &sys.mmcr0); | |
85 | oprofilefs_create_ulong(sb, root, "mmcr1", &sys.mmcr1); | |
86 | oprofilefs_create_ulong(sb, root, "mmcra", &sys.mmcra); | |
87 | ||
88 | for (i = 0; i < model->num_counters; ++i) { | |
89 | struct dentry *dir; | |
90 | char buf[3]; | |
91 | ||
92 | snprintf(buf, sizeof buf, "%d", i); | |
93 | dir = oprofilefs_mkdir(sb, root, buf); | |
94 | ||
95 | oprofilefs_create_ulong(sb, dir, "enabled", &ctr[i].enabled); | |
96 | oprofilefs_create_ulong(sb, dir, "event", &ctr[i].event); | |
97 | oprofilefs_create_ulong(sb, dir, "count", &ctr[i].count); | |
98 | /* | |
99 | * We dont support per counter user/kernel selection, but | |
100 | * we leave the entries because userspace expects them | |
101 | */ | |
102 | oprofilefs_create_ulong(sb, dir, "kernel", &ctr[i].kernel); | |
103 | oprofilefs_create_ulong(sb, dir, "user", &ctr[i].user); | |
104 | oprofilefs_create_ulong(sb, dir, "unit_mask", &ctr[i].unit_mask); | |
105 | } | |
106 | ||
107 | oprofilefs_create_ulong(sb, root, "enable_kernel", &sys.enable_kernel); | |
108 | oprofilefs_create_ulong(sb, root, "enable_user", &sys.enable_user); | |
109 | oprofilefs_create_ulong(sb, root, "backtrace_spinlocks", | |
110 | &sys.backtrace_spinlocks); | |
111 | ||
112 | /* Default to tracing both kernel and user */ | |
113 | sys.enable_kernel = 1; | |
114 | sys.enable_user = 1; | |
115 | ||
116 | /* Turn on backtracing through spinlocks by default */ | |
117 | sys.backtrace_spinlocks = 1; | |
118 | ||
119 | return 0; | |
120 | } | |
121 | ||
122 | int __init oprofile_arch_init(struct oprofile_operations *ops) | |
123 | { | |
8fef0306 AB |
124 | if (!cur_cpu_spec->oprofile_model || !cur_cpu_spec->oprofile_cpu_type) |
125 | return -ENODEV; | |
1da177e4 | 126 | |
8fef0306 | 127 | model = cur_cpu_spec->oprofile_model; |
a6908cd0 | 128 | model->num_counters = cur_cpu_spec->num_pmcs; |
8fef0306 AB |
129 | |
130 | ops->cpu_type = cur_cpu_spec->oprofile_cpu_type; | |
1da177e4 LT |
131 | ops->create_files = op_ppc64_create_files; |
132 | ops->setup = op_ppc64_setup; | |
133 | ops->shutdown = op_ppc64_shutdown; | |
134 | ops->start = op_ppc64_start; | |
135 | ops->stop = op_ppc64_stop; | |
136 | ||
137 | printk(KERN_INFO "oprofile: using %s performance monitoring.\n", | |
138 | ops->cpu_type); | |
139 | ||
140 | return 0; | |
141 | } | |
142 | ||
143 | void oprofile_arch_exit(void) | |
144 | { | |
145 | } |