2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
6 * Copyright (C) 2004, 2005 Ralf Baechle
7 * Copyright (C) 2005 MIPS Technologies, Inc.
9 #include <linux/compiler.h>
10 #include <linux/errno.h>
11 #include <linux/init.h>
12 #include <linux/oprofile.h>
13 #include <linux/smp.h>
14 #include <asm/cpu-info.h>
15 #include <asm/cpu-type.h>
19 extern struct op_mips_model op_model_mipsxx_ops __weak
;
20 extern struct op_mips_model op_model_loongson2_ops __weak
;
21 extern struct op_mips_model op_model_loongson3_ops __weak
;
23 static struct op_mips_model
*model
;
25 static struct op_counter_config ctr
[20];
27 static int op_mips_setup(void)
29 /* Pre-compute the values to stuff in the hardware registers. */
30 model
->reg_setup(ctr
);
32 /* Configure the registers on all cpus. */
33 on_each_cpu(model
->cpu_setup
, NULL
, 1);
38 static int op_mips_create_files(struct dentry
*root
)
42 for (i
= 0; i
< model
->num_counters
; ++i
) {
46 snprintf(buf
, sizeof buf
, "%d", i
);
47 dir
= oprofilefs_mkdir(root
, buf
);
49 oprofilefs_create_ulong(dir
, "enabled", &ctr
[i
].enabled
);
50 oprofilefs_create_ulong(dir
, "event", &ctr
[i
].event
);
51 oprofilefs_create_ulong(dir
, "count", &ctr
[i
].count
);
52 oprofilefs_create_ulong(dir
, "kernel", &ctr
[i
].kernel
);
53 oprofilefs_create_ulong(dir
, "user", &ctr
[i
].user
);
54 oprofilefs_create_ulong(dir
, "exl", &ctr
[i
].exl
);
56 oprofilefs_create_ulong(dir
, "unit_mask", &ctr
[i
].unit_mask
);
62 static int op_mips_start(void)
64 on_each_cpu(model
->cpu_start
, NULL
, 1);
69 static void op_mips_stop(void)
71 /* Disable performance monitoring for all counters. */
72 on_each_cpu(model
->cpu_stop
, NULL
, 1);
75 int __init
oprofile_arch_init(struct oprofile_operations
*ops
)
77 struct op_mips_model
*lmodel
= NULL
;
80 switch (boot_cpu_type()) {
104 lmodel
= &op_model_mipsxx_ops
;
107 case CPU_LOONGSON2EF
:
108 lmodel
= &op_model_loongson2_ops
;
111 lmodel
= &op_model_loongson3_ops
;
116 * Always set the backtrace. This allows unsupported CPU types to still
117 * use timer-based oprofile.
119 ops
->backtrace
= op_mips_backtrace
;
124 res
= lmodel
->init();
130 ops
->create_files
= op_mips_create_files
;
131 ops
->setup
= op_mips_setup
;
132 //ops->shutdown = op_mips_shutdown;
133 ops
->start
= op_mips_start
;
134 ops
->stop
= op_mips_stop
;
135 ops
->cpu_type
= lmodel
->cpu_type
;
137 printk(KERN_INFO
"oprofile: using %s performance monitoring.\n",
143 void oprofile_arch_exit(void)