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>
This commit is contained in:
Paul Mundt 2008-12-16 09:33:53 +09:00
parent 70fe224743
commit 60a51fbe5d
4 changed files with 178 additions and 30 deletions

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@ -6,11 +6,8 @@ DRIVER_OBJS = $(addprefix ../../../drivers/oprofile/, \
oprofilefs.o oprofile_stats.o \
timer_int.o )
profdrvr-y := op_model_null.o
oprofile-y := $(DRIVER_OBJS) common.o backtrace.o
# SH7750-style performance counters exist across 7750/7750S and 7091.
profdrvr-$(CONFIG_CPU_SUBTYPE_SH7750S) := op_model_sh7750.o
profdrvr-$(CONFIG_CPU_SUBTYPE_SH7750) := op_model_sh7750.o
profdrvr-$(CONFIG_CPU_SUBTYPE_SH7091) := op_model_sh7750.o
oprofile-y := $(DRIVER_OBJS) $(profdrvr-y)
oprofile-$(CONFIG_CPU_SUBTYPE_SH7750S) += op_model_sh7750.o
oprofile-$(CONFIG_CPU_SUBTYPE_SH7750) += op_model_sh7750.o
oprofile-$(CONFIG_CPU_SUBTYPE_SH7091) += op_model_sh7750.o

141
arch/sh/oprofile/common.c Normal file
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@ -0,0 +1,141 @@
/*
* 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];
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;
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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@ -0,0 +1,33 @@
#ifndef __OP_IMPL_H
#define __OP_IMPL_H
/* Per-counter configuration as set via oprofilefs. */
struct op_counter_config {
unsigned long enabled;
unsigned long event;
unsigned long long count;
/* Dummy values for userspace tool compliance */
unsigned long kernel;
unsigned long user;
unsigned long unit_mask;
};
/* Per-architecture configury and hooks. */
struct op_sh_model {
void (*reg_setup)(struct op_counter_config *);
int (*create_files)(struct super_block *sb, struct dentry *dir);
void (*cpu_setup)(void *dummy);
int (*init)(void);
void (*exit)(void);
void (*cpu_start)(void *args);
void (*cpu_stop)(void *args);
char *cpu_type;
unsigned char num_counters;
};
/* arch/sh/oprofile/common.c */
extern void sh_backtrace(struct pt_regs * const regs, unsigned int depth);
#endif /* __OP_IMPL_H */

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@ -1,23 +0,0 @@
/*
* arch/sh/oprofile/op_model_null.c
*
* Copyright (C) 2003 Paul Mundt
*
* 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>
int __init oprofile_arch_init(struct oprofile_operations *ops)
{
return -ENODEV;
}
void oprofile_arch_exit(void)
{
}