2 * File: arch/blackfin/oprofile/common.c
3 * Based on: arch/alpha/oprofile/common.c
4 * Author: Anton Blanchard <anton@au.ibm.com>
10 * Copyright (C) 2004 Anton Blanchard <anton@au.ibm.com>, IBM
11 * Copyright 2004-2006 Analog Devices Inc.
13 * Bugs: Enter bugs at http://blackfin.uclinux.org/
15 * This program is free software; you can redistribute it and/or modify
16 * it under the terms of the GNU General Public License as published by
17 * the Free Software Foundation; either version 2 of the License, or
18 * (at your option) any later version.
20 * This program is distributed in the hope that it will be useful,
21 * but WITHOUT ANY WARRANTY; without even the implied warranty of
22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 * GNU General Public License for more details.
25 * You should have received a copy of the GNU General Public License
26 * along with this program; if not, see the file COPYING, or write
27 * to the Free Software Foundation, Inc.,
28 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
31 #include <linux/oprofile.h>
32 #include <linux/init.h>
33 #include <linux/smp.h>
34 #include <linux/errno.h>
35 #include <linux/mutex.h>
36 #include <linux/ptrace.h>
37 #include <linux/irq.h>
40 #include <asm/system.h>
41 #include <asm/blackfin.h>
43 #include "op_blackfin.h"
45 #define BFIN_533_ID 0xE5040003
46 #define BFIN_537_ID 0xE5040002
48 static int pfmon_enabled
;
49 static struct mutex pfmon_lock
;
51 struct op_bfin533_model
*model
;
53 struct op_counter_config ctr
[OP_MAX_COUNTER
];
55 static int op_bfin_setup(void)
59 /* Pre-compute the values to stuff in the hardware registers. */
60 spin_lock(&oprofilefs_lock
);
61 ret
= model
->reg_setup(ctr
);
62 spin_unlock(&oprofilefs_lock
);
67 static void op_bfin_shutdown(void)
70 /* what is the difference between shutdown and stop? */
74 static int op_bfin_start(void)
78 printk(KERN_INFO
"KSDBG:in %s\n", __FUNCTION__
);
79 mutex_lock(&pfmon_lock
);
81 ret
= model
->start(ctr
);
84 mutex_unlock(&pfmon_lock
);
89 static void op_bfin_stop(void)
91 mutex_lock(&pfmon_lock
);
96 mutex_unlock(&pfmon_lock
);
99 static int op_bfin_create_files(struct super_block
*sb
, struct dentry
*root
)
103 for (i
= 0; i
< model
->num_counters
; ++i
) {
106 printk(KERN_INFO
"Oprofile: creating files... \n");
108 snprintf(buf
, sizeof buf
, "%d", i
);
109 dir
= oprofilefs_mkdir(sb
, root
, buf
);
111 oprofilefs_create_ulong(sb
, dir
, "enabled", &ctr
[i
].enabled
);
112 oprofilefs_create_ulong(sb
, dir
, "event", &ctr
[i
].event
);
113 oprofilefs_create_ulong(sb
, dir
, "count", &ctr
[i
].count
);
115 * We dont support per counter user/kernel selection, but
116 * we leave the entries because userspace expects them
118 oprofilefs_create_ulong(sb
, dir
, "kernel", &ctr
[i
].kernel
);
119 oprofilefs_create_ulong(sb
, dir
, "user", &ctr
[i
].user
);
120 oprofilefs_create_ulong(sb
, dir
, "unit_mask",
126 int __init
oprofile_arch_init(struct oprofile_operations
*ops
)
128 #ifdef CONFIG_HARDWARE_PM
131 mutex_init(&pfmon_lock
);
133 dspid
= bfin_read_DSPID();
135 printk(KERN_INFO
"Oprofile got the cpu id is 0x%x. \n", dspid
);
139 model
= &op_model_bfin533
;
140 model
->num_counters
= 2;
143 model
= &op_model_bfin533
;
144 model
->num_counters
= 2;
150 ops
->cpu_type
= model
->name
;
151 ops
->create_files
= op_bfin_create_files
;
152 ops
->setup
= op_bfin_setup
;
153 ops
->shutdown
= op_bfin_shutdown
;
154 ops
->start
= op_bfin_start
;
155 ops
->stop
= op_bfin_stop
;
157 printk(KERN_INFO
"oprofile: using %s performance monitoring.\n",
166 void oprofile_arch_exit(void)
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