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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>
23#include <asm/cputable.h>
24#include <asm/oprofile_impl.h>
25#include <asm/firmware.h>
26
27static struct op_powerpc_model *model;
28
29static struct op_counter_config ctr[OP_MAX_COUNTER];
30static struct op_system_config sys;
31
32static int op_per_cpu_rc;
33
34static void op_handle_interrupt(struct pt_regs *regs)
35{
36 model->handle_interrupt(regs, ctr);
37}
38
39static void op_powerpc_cpu_setup(void *dummy)
40{
41 int ret;
42
43 ret = model->cpu_setup(ctr);
44
45 if (ret != 0)
46 op_per_cpu_rc = ret;
47}
48
49static int op_powerpc_setup(void)
50{
51 int err;
52
53 op_per_cpu_rc = 0;
54
55
56 err = reserve_pmc_hardware(op_handle_interrupt);
57 if (err)
58 return err;
59
60
61 op_per_cpu_rc = model->reg_setup(ctr, &sys, model->num_counters);
62
63 if (op_per_cpu_rc)
64 goto out;
65
66
67
68 on_each_cpu(op_powerpc_cpu_setup, NULL, 1);
69
70out: if (op_per_cpu_rc) {
71
72 release_pmc_hardware();
73 }
74
75 return op_per_cpu_rc;
76}
77
78static void op_powerpc_shutdown(void)
79{
80 release_pmc_hardware();
81}
82
83static void op_powerpc_cpu_start(void *dummy)
84{
85
86
87
88
89 int ret;
90
91 ret = model->start(ctr);
92 if (ret != 0)
93 op_per_cpu_rc = ret;
94}
95
96static int op_powerpc_start(void)
97{
98 op_per_cpu_rc = 0;
99
100 if (model->global_start)
101 return model->global_start(ctr);
102 if (model->start) {
103 on_each_cpu(op_powerpc_cpu_start, NULL, 1);
104 return op_per_cpu_rc;
105 }
106 return -EIO;
107
108}
109
110static inline void op_powerpc_cpu_stop(void *dummy)
111{
112 model->stop();
113}
114
115static void op_powerpc_stop(void)
116{
117 if (model->stop)
118 on_each_cpu(op_powerpc_cpu_stop, NULL, 1);
119 if (model->global_stop)
120 model->global_stop();
121}
122
123static int op_powerpc_create_files(struct super_block *sb, struct dentry *root)
124{
125 int i;
126
127#ifdef CONFIG_PPC64
128
129
130
131
132 oprofilefs_create_ulong(sb, root, "mmcr0", &sys.mmcr0);
133 oprofilefs_create_ulong(sb, root, "mmcr1", &sys.mmcr1);
134 oprofilefs_create_ulong(sb, root, "mmcra", &sys.mmcra);
135#ifdef CONFIG_OPROFILE_CELL
136
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144
145
146 oprofilefs_create_ulong(sb, root, "cell_support", &sys.cell_support);
147 sys.cell_support = 0x1;
148
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154
155
156#endif
157#endif
158
159 for (i = 0; i < model->num_counters; ++i) {
160 struct dentry *dir;
161 char buf[4];
162
163 snprintf(buf, sizeof buf, "%d", i);
164 dir = oprofilefs_mkdir(sb, root, buf);
165
166 oprofilefs_create_ulong(sb, dir, "enabled", &ctr[i].enabled);
167 oprofilefs_create_ulong(sb, dir, "event", &ctr[i].event);
168 oprofilefs_create_ulong(sb, dir, "count", &ctr[i].count);
169
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176
177 oprofilefs_create_ulong(sb, dir, "kernel", &ctr[i].kernel);
178 oprofilefs_create_ulong(sb, dir, "user", &ctr[i].user);
179
180 oprofilefs_create_ulong(sb, dir, "unit_mask", &ctr[i].unit_mask);
181 }
182
183 oprofilefs_create_ulong(sb, root, "enable_kernel", &sys.enable_kernel);
184 oprofilefs_create_ulong(sb, root, "enable_user", &sys.enable_user);
185
186
187 sys.enable_kernel = 1;
188 sys.enable_user = 1;
189
190 return 0;
191}
192
193int __init oprofile_arch_init(struct oprofile_operations *ops)
194{
195 if (!cur_cpu_spec->oprofile_cpu_type)
196 return -ENODEV;
197
198 if (firmware_has_feature(FW_FEATURE_ISERIES))
199 return -ENODEV;
200
201 switch (cur_cpu_spec->oprofile_type) {
202#ifdef CONFIG_PPC64
203#ifdef CONFIG_OPROFILE_CELL
204 case PPC_OPROFILE_CELL:
205 if (firmware_has_feature(FW_FEATURE_LPAR))
206 return -ENODEV;
207 model = &op_model_cell;
208 ops->sync_start = model->sync_start;
209 ops->sync_stop = model->sync_stop;
210 break;
211#endif
212 case PPC_OPROFILE_RS64:
213 model = &op_model_rs64;
214 break;
215 case PPC_OPROFILE_POWER4:
216 model = &op_model_power4;
217 break;
218 case PPC_OPROFILE_PA6T:
219 model = &op_model_pa6t;
220 break;
221#endif
222#ifdef CONFIG_6xx
223 case PPC_OPROFILE_G4:
224 model = &op_model_7450;
225 break;
226#endif
227#if defined(CONFIG_FSL_EMB_PERFMON)
228 case PPC_OPROFILE_FSL_EMB:
229 model = &op_model_fsl_emb;
230 break;
231#endif
232 default:
233 return -ENODEV;
234 }
235
236 model->num_counters = cur_cpu_spec->num_pmcs;
237
238 ops->cpu_type = cur_cpu_spec->oprofile_cpu_type;
239 ops->create_files = op_powerpc_create_files;
240 ops->setup = op_powerpc_setup;
241 ops->shutdown = op_powerpc_shutdown;
242 ops->start = op_powerpc_start;
243 ops->stop = op_powerpc_stop;
244 ops->backtrace = op_powerpc_backtrace;
245
246 printk(KERN_DEBUG "oprofile: using %s performance monitoring.\n",
247 ops->cpu_type);
248
249 return 0;
250}
251
252void oprofile_arch_exit(void)
253{
254}
255