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authorPaul Mundt <lethal@linux-sh.org>2008-12-15 19:33:53 -0500
committerPaul Mundt <lethal@linux-sh.org>2008-12-22 04:44:43 -0500
commit60a51fbe5dd2baef0f35bcf79f25ac1ee239a660 (patch)
tree5183e3e22c526129f6fa9ddbe973116f2bed08b1 /arch/sh
parent70fe224743c11b57f9b63326313988fdcceb54df (diff)
sh: oprofile: Refactor common setup code for multiple driver support.
This re-implements the old op_model_null code in to something more generic, where multiple drivers, backtrace, etc. can all be interfaced. Based largely on arch/mips/oprofile/common.c. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh')
-rw-r--r--arch/sh/oprofile/Makefile11
-rw-r--r--arch/sh/oprofile/common.c141
-rw-r--r--arch/sh/oprofile/op_impl.h33
-rw-r--r--arch/sh/oprofile/op_model_null.c23
4 files changed, 178 insertions, 30 deletions
diff --git a/arch/sh/oprofile/Makefile b/arch/sh/oprofile/Makefile
index 3d48f2721287..8e6eec91c14c 100644
--- a/arch/sh/oprofile/Makefile
+++ b/arch/sh/oprofile/Makefile
@@ -6,11 +6,8 @@ DRIVER_OBJS = $(addprefix ../../../drivers/oprofile/, \
6 oprofilefs.o oprofile_stats.o \ 6 oprofilefs.o oprofile_stats.o \
7 timer_int.o ) 7 timer_int.o )
8 8
9profdrvr-y := op_model_null.o 9oprofile-y := $(DRIVER_OBJS) common.o backtrace.o
10 10
11# SH7750-style performance counters exist across 7750/7750S and 7091. 11oprofile-$(CONFIG_CPU_SUBTYPE_SH7750S) += op_model_sh7750.o
12profdrvr-$(CONFIG_CPU_SUBTYPE_SH7750S) := op_model_sh7750.o 12oprofile-$(CONFIG_CPU_SUBTYPE_SH7750) += op_model_sh7750.o
13profdrvr-$(CONFIG_CPU_SUBTYPE_SH7750) := op_model_sh7750.o 13oprofile-$(CONFIG_CPU_SUBTYPE_SH7091) += op_model_sh7750.o
14profdrvr-$(CONFIG_CPU_SUBTYPE_SH7091) := op_model_sh7750.o
15
16oprofile-y := $(DRIVER_OBJS) $(profdrvr-y)
diff --git a/arch/sh/oprofile/common.c b/arch/sh/oprofile/common.c
new file mode 100644
index 000000000000..a4d8c0c9a63c
--- /dev/null
+++ b/arch/sh/oprofile/common.c
@@ -0,0 +1,141 @@
1/*
2 * arch/sh/oprofile/init.c
3 *
4 * Copyright (C) 2003 - 2008 Paul Mundt
5 *
6 * Based on arch/mips/oprofile/common.c:
7 *
8 * Copyright (C) 2004, 2005 Ralf Baechle
9 * Copyright (C) 2005 MIPS Technologies, Inc.
10 *
11 * This file is subject to the terms and conditions of the GNU General Public
12 * License. See the file "COPYING" in the main directory of this archive
13 * for more details.
14 */
15#include <linux/kernel.h>
16#include <linux/oprofile.h>
17#include <linux/init.h>
18#include <linux/errno.h>
19#include <linux/smp.h>
20#include <asm/processor.h>
21#include "op_impl.h"
22
23extern struct op_sh_model op_model_sh7750_ops __weak;
24extern struct op_sh_model op_model_sh4a_ops __weak;
25
26static struct op_sh_model *model;
27
28static struct op_counter_config ctr[20];
29
30static int op_sh_setup(void)
31{
32 /* Pre-compute the values to stuff in the hardware registers. */
33 model->reg_setup(ctr);
34
35 /* Configure the registers on all cpus. */
36 on_each_cpu(model->cpu_setup, NULL, 1);
37
38 return 0;
39}
40
41static int op_sh_create_files(struct super_block *sb, struct dentry *root)
42{
43 int i, ret = 0;
44
45 for (i = 0; i < model->num_counters; i++) {
46 struct dentry *dir;
47 char buf[4];
48
49 snprintf(buf, sizeof(buf), "%d", i);
50 dir = oprofilefs_mkdir(sb, root, buf);
51
52 ret |= oprofilefs_create_ulong(sb, dir, "enabled", &ctr[i].enabled);
53 ret |= oprofilefs_create_ulong(sb, dir, "event", &ctr[i].event);
54 ret |= oprofilefs_create_ulong(sb, dir, "kernel", &ctr[i].kernel);
55 ret |= oprofilefs_create_ulong(sb, dir, "user", &ctr[i].user);
56
57 if (model->create_files)
58 ret |= model->create_files(sb, dir);
59 else
60 ret |= oprofilefs_create_ulong(sb, dir, "count", &ctr[i].count);
61
62 /* Dummy entries */
63 ret |= oprofilefs_create_ulong(sb, dir, "unit_mask", &ctr[i].unit_mask);
64 }
65
66 return ret;
67}
68
69static int op_sh_start(void)
70{
71 /* Enable performance monitoring for all counters. */
72 on_each_cpu(model->cpu_start, NULL, 1);
73
74 return 0;
75}
76
77static void op_sh_stop(void)
78{
79 /* Disable performance monitoring for all counters. */
80 on_each_cpu(model->cpu_stop, NULL, 1);
81}
82
83int __init oprofile_arch_init(struct oprofile_operations *ops)
84{
85 struct op_sh_model *lmodel = NULL;
86 int ret;
87
88 switch (current_cpu_data.type) {
89 /* SH-4 types */
90 case CPU_SH7750:
91 case CPU_SH7750S:
92 lmodel = &op_model_sh7750_ops;
93 break;
94
95 /* SH-4A types */
96 case CPU_SH7763:
97 case CPU_SH7770:
98 case CPU_SH7780:
99 case CPU_SH7781:
100 case CPU_SH7785:
101 case CPU_SH7723:
102 case CPU_SHX3:
103 lmodel = &op_model_sh4a_ops;
104 break;
105
106 /* SH4AL-DSP types */
107 case CPU_SH7343:
108 case CPU_SH7722:
109 case CPU_SH7366:
110 lmodel = &op_model_sh4a_ops;
111 break;
112 }
113
114 if (!lmodel)
115 return -ENODEV;
116 if (!(current_cpu_data.flags & CPU_HAS_PERF_COUNTER))
117 return -ENODEV;
118
119 ret = lmodel->init();
120 if (unlikely(ret != 0))
121 return ret;
122
123 model = lmodel;
124
125 ops->setup = op_sh_setup;
126 ops->create_files = op_sh_create_files;
127 ops->start = op_sh_start;
128 ops->stop = op_sh_stop;
129 ops->cpu_type = lmodel->cpu_type;
130
131 printk(KERN_INFO "oprofile: using %s performance monitoring.\n",
132 lmodel->cpu_type);
133
134 return 0;
135}
136
137void oprofile_arch_exit(void)
138{
139 if (model && model->exit)
140 model->exit();
141}
diff --git a/arch/sh/oprofile/op_impl.h b/arch/sh/oprofile/op_impl.h
new file mode 100644
index 000000000000..4d509975eba6
--- /dev/null
+++ b/arch/sh/oprofile/op_impl.h
@@ -0,0 +1,33 @@
1#ifndef __OP_IMPL_H
2#define __OP_IMPL_H
3
4/* Per-counter configuration as set via oprofilefs. */
5struct op_counter_config {
6 unsigned long enabled;
7 unsigned long event;
8
9 unsigned long long count;
10
11 /* Dummy values for userspace tool compliance */
12 unsigned long kernel;
13 unsigned long user;
14 unsigned long unit_mask;
15};
16
17/* Per-architecture configury and hooks. */
18struct op_sh_model {
19 void (*reg_setup)(struct op_counter_config *);
20 int (*create_files)(struct super_block *sb, struct dentry *dir);
21 void (*cpu_setup)(void *dummy);
22 int (*init)(void);
23 void (*exit)(void);
24 void (*cpu_start)(void *args);
25 void (*cpu_stop)(void *args);
26 char *cpu_type;
27 unsigned char num_counters;
28};
29
30/* arch/sh/oprofile/common.c */
31extern void sh_backtrace(struct pt_regs * const regs, unsigned int depth);
32
33#endif /* __OP_IMPL_H */
diff --git a/arch/sh/oprofile/op_model_null.c b/arch/sh/oprofile/op_model_null.c
deleted file mode 100644
index a845b088edb4..000000000000
--- a/arch/sh/oprofile/op_model_null.c
+++ /dev/null
@@ -1,23 +0,0 @@
1/*
2 * arch/sh/oprofile/op_model_null.c
3 *
4 * Copyright (C) 2003 Paul Mundt
5 *
6 * This file is subject to the terms and conditions of the GNU General Public
7 * License. See the file "COPYING" in the main directory of this archive
8 * for more details.
9 */
10#include <linux/kernel.h>
11#include <linux/oprofile.h>
12#include <linux/init.h>
13#include <linux/errno.h>
14
15int __init oprofile_arch_init(struct oprofile_operations *ops)
16{
17 return -ENODEV;
18}
19
20void oprofile_arch_exit(void)
21{
22}
23
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