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/*
* arch/sh/oprofile/init.c
*
* Copyright (C) 2003 - 2008 Paul Mundt
*
* Based on arch/mips/oprofile/common.c:
*
* Copyright (C) 2004, 2005 Ralf Baechle
* Copyright (C) 2005 MIPS Technologies, Inc.
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*/
#include <linux/kernel.h>
#include <linux/oprofile.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/smp.h>
#include <asm/processor.h>
#include "op_impl.h"
extern struct op_sh_model op_model_sh7750_ops __weak;
extern struct op_sh_model op_model_sh4a_ops __weak;
static struct op_sh_model *model;
static struct op_counter_config ctr[20];
extern void sh_backtrace(struct pt_regs * const regs, unsigned int depth);
static int op_sh_setup(void)
{
/* Pre-compute the values to stuff in the hardware registers. */
model->reg_setup(ctr);
/* Configure the registers on all cpus. */
on_each_cpu(model->cpu_setup, NULL, 1);
return 0;
}
static int op_sh_create_files(struct super_block *sb, struct dentry *root)
{
int i, ret = 0;
for (i = 0; i < model->num_counters; i++) {
struct dentry *dir;
char buf[4];
snprintf(buf, sizeof(buf), "%d", i);
dir = oprofilefs_mkdir(sb, root, buf);
ret |= oprofilefs_create_ulong(sb, dir, "enabled", &ctr[i].enabled);
ret |= oprofilefs_create_ulong(sb, dir, "event", &ctr[i].event);
ret |= oprofilefs_create_ulong(sb, dir, "kernel", &ctr[i].kernel);
ret |= oprofilefs_create_ulong(sb, dir, "user", &ctr[i].user);
if (model->create_files)
ret |= model->create_files(sb, dir);
else
ret |= oprofilefs_create_ulong(sb, dir, "count", &ctr[i].count);
/* Dummy entries */
ret |= oprofilefs_create_ulong(sb, dir, "unit_mask", &ctr[i].unit_mask);
}
return ret;
}
static int op_sh_start(void)
{
/* Enable performance monitoring for all counters. */
on_each_cpu(model->cpu_start, NULL, 1);
return 0;
}
static void op_sh_stop(void)
{
/* Disable performance monitoring for all counters. */
on_each_cpu(model->cpu_stop, NULL, 1);
}
int __init oprofile_arch_init(struct oprofile_operations *ops)
{
struct op_sh_model *lmodel = NULL;
int ret;
/*
* Always assign the backtrace op. If the counter initialization
* fails, we fall back to the timer which will still make use of
* this.
*/
ops->backtrace = sh_backtrace;
switch (current_cpu_data.type) {
/* SH-4 types */
case CPU_SH7750:
case CPU_SH7750S:
lmodel = &op_model_sh7750_ops;
break;
/* SH-4A types */
case CPU_SH7763:
case CPU_SH7770:
case CPU_SH7780:
case CPU_SH7781:
case CPU_SH7785:
case CPU_SH7723:
case CPU_SHX3:
lmodel = &op_model_sh4a_ops;
break;
/* SH4AL-DSP types */
case CPU_SH7343:
case CPU_SH7722:
case CPU_SH7366:
lmodel = &op_model_sh4a_ops;
break;
}
if (!lmodel)
return -ENODEV;
if (!(current_cpu_data.flags & CPU_HAS_PERF_COUNTER))
return -ENODEV;
ret = lmodel->init();
if (unlikely(ret != 0))
return ret;
model = lmodel;
ops->setup = op_sh_setup;
ops->create_files = op_sh_create_files;
ops->start = op_sh_start;
ops->stop = op_sh_stop;
ops->cpu_type = lmodel->cpu_type;
printk(KERN_INFO "oprofile: using %s performance monitoring.\n",
lmodel->cpu_type);
return 0;
}
void oprofile_arch_exit(void)
{
if (model && model->exit)
model->exit();
}
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