Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /** |
2 | * @file arch/alpha/oprofile/common.c | |
3 | * | |
4 | * @remark Copyright 2002 OProfile authors | |
5 | * @remark Read the file COPYING | |
6 | * | |
7 | * @author Richard Henderson <rth@twiddle.net> | |
8 | */ | |
9 | ||
10 | #include <linux/oprofile.h> | |
11 | #include <linux/init.h> | |
12 | #include <linux/smp.h> | |
13 | #include <linux/errno.h> | |
14 | #include <asm/ptrace.h> | |
d1b5153f | 15 | #include <asm/special_insns.h> |
1da177e4 LT |
16 | |
17 | #include "op_impl.h" | |
18 | ||
19 | extern struct op_axp_model op_model_ev4 __attribute__((weak)); | |
20 | extern struct op_axp_model op_model_ev5 __attribute__((weak)); | |
21 | extern struct op_axp_model op_model_pca56 __attribute__((weak)); | |
22 | extern struct op_axp_model op_model_ev6 __attribute__((weak)); | |
23 | extern struct op_axp_model op_model_ev67 __attribute__((weak)); | |
24 | ||
25 | static struct op_axp_model *model; | |
26 | ||
27 | extern void (*perf_irq)(unsigned long, struct pt_regs *); | |
28 | static void (*save_perf_irq)(unsigned long, struct pt_regs *); | |
29 | ||
30 | static struct op_counter_config ctr[20]; | |
31 | static struct op_system_config sys; | |
32 | static struct op_register_config reg; | |
33 | ||
34 | /* Called from do_entInt to handle the performance monitor interrupt. */ | |
35 | ||
36 | static void | |
37 | op_handle_interrupt(unsigned long which, struct pt_regs *regs) | |
38 | { | |
39 | model->handle_interrupt(which, regs, ctr); | |
40 | ||
41 | /* If the user has selected an interrupt frequency that is | |
42 | not exactly the width of the counter, write a new value | |
43 | into the counter such that it'll overflow after N more | |
44 | events. */ | |
45 | if ((reg.need_reset >> which) & 1) | |
46 | model->reset_ctr(®, which); | |
47 | } | |
48 | ||
49 | static int | |
50 | op_axp_setup(void) | |
51 | { | |
52 | unsigned long i, e; | |
53 | ||
54 | /* Install our interrupt handler into the existing hook. */ | |
55 | save_perf_irq = perf_irq; | |
56 | perf_irq = op_handle_interrupt; | |
57 | ||
58 | /* Compute the mask of enabled counters. */ | |
59 | for (i = e = 0; i < model->num_counters; ++i) | |
60 | if (ctr[i].enabled) | |
61 | e |= 1 << i; | |
62 | reg.enable = e; | |
63 | ||
64 | /* Pre-compute the values to stuff in the hardware registers. */ | |
65 | model->reg_setup(®, ctr, &sys); | |
66 | ||
67 | /* Configure the registers on all cpus. */ | |
8691e5a8 | 68 | (void)smp_call_function(model->cpu_setup, ®, 1); |
1da177e4 LT |
69 | model->cpu_setup(®); |
70 | return 0; | |
71 | } | |
72 | ||
73 | static void | |
74 | op_axp_shutdown(void) | |
75 | { | |
76 | /* Remove our interrupt handler. We may be removing this module. */ | |
77 | perf_irq = save_perf_irq; | |
78 | } | |
79 | ||
80 | static void | |
81 | op_axp_cpu_start(void *dummy) | |
82 | { | |
83 | wrperfmon(1, reg.enable); | |
84 | } | |
85 | ||
86 | static int | |
87 | op_axp_start(void) | |
88 | { | |
8691e5a8 | 89 | (void)smp_call_function(op_axp_cpu_start, NULL, 1); |
1da177e4 LT |
90 | op_axp_cpu_start(NULL); |
91 | return 0; | |
92 | } | |
93 | ||
94 | static inline void | |
95 | op_axp_cpu_stop(void *dummy) | |
96 | { | |
97 | /* Disable performance monitoring for all counters. */ | |
98 | wrperfmon(0, -1); | |
99 | } | |
100 | ||
101 | static void | |
102 | op_axp_stop(void) | |
103 | { | |
8691e5a8 | 104 | (void)smp_call_function(op_axp_cpu_stop, NULL, 1); |
1da177e4 LT |
105 | op_axp_cpu_stop(NULL); |
106 | } | |
107 | ||
108 | static int | |
ef7bca14 | 109 | op_axp_create_files(struct dentry *root) |
1da177e4 LT |
110 | { |
111 | int i; | |
112 | ||
113 | for (i = 0; i < model->num_counters; ++i) { | |
114 | struct dentry *dir; | |
0c6856f7 | 115 | char buf[4]; |
1da177e4 LT |
116 | |
117 | snprintf(buf, sizeof buf, "%d", i); | |
ecde2823 | 118 | dir = oprofilefs_mkdir(root, buf); |
1da177e4 | 119 | |
6af4ea0b AV |
120 | oprofilefs_create_ulong(dir, "enabled", &ctr[i].enabled); |
121 | oprofilefs_create_ulong(dir, "event", &ctr[i].event); | |
122 | oprofilefs_create_ulong(dir, "count", &ctr[i].count); | |
1da177e4 | 123 | /* Dummies. */ |
6af4ea0b AV |
124 | oprofilefs_create_ulong(dir, "kernel", &ctr[i].kernel); |
125 | oprofilefs_create_ulong(dir, "user", &ctr[i].user); | |
126 | oprofilefs_create_ulong(dir, "unit_mask", &ctr[i].unit_mask); | |
1da177e4 LT |
127 | } |
128 | ||
129 | if (model->can_set_proc_mode) { | |
6af4ea0b | 130 | oprofilefs_create_ulong(root, "enable_pal", |
1da177e4 | 131 | &sys.enable_pal); |
6af4ea0b | 132 | oprofilefs_create_ulong(root, "enable_kernel", |
1da177e4 | 133 | &sys.enable_kernel); |
6af4ea0b | 134 | oprofilefs_create_ulong(root, "enable_user", |
1da177e4 LT |
135 | &sys.enable_user); |
136 | } | |
137 | ||
138 | return 0; | |
139 | } | |
140 | ||
141 | int __init | |
142 | oprofile_arch_init(struct oprofile_operations *ops) | |
143 | { | |
144 | struct op_axp_model *lmodel = NULL; | |
145 | ||
146 | switch (implver()) { | |
147 | case IMPLVER_EV4: | |
148 | lmodel = &op_model_ev4; | |
149 | break; | |
150 | case IMPLVER_EV5: | |
151 | /* 21164PC has a slightly different set of events. | |
152 | Recognize the chip by the presence of the MAX insns. */ | |
153 | if (!amask(AMASK_MAX)) | |
154 | lmodel = &op_model_pca56; | |
155 | else | |
156 | lmodel = &op_model_ev5; | |
157 | break; | |
158 | case IMPLVER_EV6: | |
159 | /* 21264A supports ProfileMe. | |
160 | Recognize the chip by the presence of the CIX insns. */ | |
161 | if (!amask(AMASK_CIX)) | |
162 | lmodel = &op_model_ev67; | |
163 | else | |
164 | lmodel = &op_model_ev6; | |
165 | break; | |
166 | } | |
167 | ||
168 | if (!lmodel) | |
169 | return -ENODEV; | |
170 | model = lmodel; | |
171 | ||
172 | ops->create_files = op_axp_create_files; | |
173 | ops->setup = op_axp_setup; | |
174 | ops->shutdown = op_axp_shutdown; | |
175 | ops->start = op_axp_start; | |
176 | ops->stop = op_axp_stop; | |
177 | ops->cpu_type = lmodel->cpu_type; | |
178 | ||
179 | printk(KERN_INFO "oprofile: using %s performance monitoring.\n", | |
180 | lmodel->cpu_type); | |
181 | ||
182 | return 0; | |
183 | } | |
184 | ||
185 | ||
186 | void | |
187 | oprofile_arch_exit(void) | |
188 | { | |
189 | } |