162 lines
3.6 KiB
C
162 lines
3.6 KiB
C
/*
|
|
* PPC 32 oprofile support
|
|
* Based on PPC64 oprofile support
|
|
* Copyright (C) 2004 Anton Blanchard <anton@au.ibm.com>, IBM
|
|
*
|
|
* Copyright (C) Freescale Semiconductor, Inc 2004
|
|
*
|
|
* Author: Andy Fleming
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version
|
|
* 2 of the License, or (at your option) any later version.
|
|
*/
|
|
|
|
#include <linux/oprofile.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/init.h>
|
|
#include <linux/smp.h>
|
|
#include <linux/errno.h>
|
|
#include <asm/ptrace.h>
|
|
#include <asm/system.h>
|
|
#include <asm/perfmon.h>
|
|
#include <asm/cputable.h>
|
|
|
|
#include "op_impl.h"
|
|
|
|
static struct op_ppc32_model *model;
|
|
|
|
static struct op_counter_config ctr[OP_MAX_COUNTER];
|
|
static struct op_system_config sys;
|
|
|
|
static void op_handle_interrupt(struct pt_regs *regs)
|
|
{
|
|
model->handle_interrupt(regs, ctr);
|
|
}
|
|
|
|
static int op_ppc32_setup(void)
|
|
{
|
|
/* Install our interrupt handler into the existing hook. */
|
|
if(request_perfmon_irq(&op_handle_interrupt))
|
|
return -EBUSY;
|
|
|
|
mb();
|
|
|
|
/* Pre-compute the values to stuff in the hardware registers. */
|
|
model->reg_setup(ctr, &sys, model->num_counters);
|
|
|
|
#if 0
|
|
/* FIXME: Make multi-cpu work */
|
|
/* Configure the registers on all cpus. */
|
|
on_each_cpu(model->reg_setup, NULL, 0, 1);
|
|
#endif
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void op_ppc32_shutdown(void)
|
|
{
|
|
mb();
|
|
|
|
/* Remove our interrupt handler. We may be removing this module. */
|
|
free_perfmon_irq();
|
|
}
|
|
|
|
static void op_ppc32_cpu_start(void *dummy)
|
|
{
|
|
model->start(ctr);
|
|
}
|
|
|
|
static int op_ppc32_start(void)
|
|
{
|
|
on_each_cpu(op_ppc32_cpu_start, NULL, 0, 1);
|
|
return 0;
|
|
}
|
|
|
|
static inline void op_ppc32_cpu_stop(void *dummy)
|
|
{
|
|
model->stop();
|
|
}
|
|
|
|
static void op_ppc32_stop(void)
|
|
{
|
|
on_each_cpu(op_ppc32_cpu_stop, NULL, 0, 1);
|
|
}
|
|
|
|
static int op_ppc32_create_files(struct super_block *sb, struct dentry *root)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < model->num_counters; ++i) {
|
|
struct dentry *dir;
|
|
char buf[3];
|
|
|
|
snprintf(buf, sizeof buf, "%d", i);
|
|
dir = oprofilefs_mkdir(sb, root, buf);
|
|
|
|
oprofilefs_create_ulong(sb, dir, "enabled", &ctr[i].enabled);
|
|
oprofilefs_create_ulong(sb, dir, "event", &ctr[i].event);
|
|
oprofilefs_create_ulong(sb, dir, "count", &ctr[i].count);
|
|
oprofilefs_create_ulong(sb, dir, "kernel", &ctr[i].kernel);
|
|
oprofilefs_create_ulong(sb, dir, "user", &ctr[i].user);
|
|
|
|
/* FIXME: Not sure if this is used */
|
|
oprofilefs_create_ulong(sb, dir, "unit_mask", &ctr[i].unit_mask);
|
|
}
|
|
|
|
oprofilefs_create_ulong(sb, root, "enable_kernel", &sys.enable_kernel);
|
|
oprofilefs_create_ulong(sb, root, "enable_user", &sys.enable_user);
|
|
|
|
/* Default to tracing both kernel and user */
|
|
sys.enable_kernel = 1;
|
|
sys.enable_user = 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct oprofile_operations oprof_ppc32_ops = {
|
|
.create_files = op_ppc32_create_files,
|
|
.setup = op_ppc32_setup,
|
|
.shutdown = op_ppc32_shutdown,
|
|
.start = op_ppc32_start,
|
|
.stop = op_ppc32_stop,
|
|
.cpu_type = NULL /* To be filled in below. */
|
|
};
|
|
|
|
int __init oprofile_arch_init(struct oprofile_operations *ops)
|
|
{
|
|
char *name;
|
|
int cpu_id = smp_processor_id();
|
|
|
|
#ifdef CONFIG_FSL_BOOKE
|
|
model = &op_model_fsl_booke;
|
|
#else
|
|
return -ENODEV;
|
|
#endif
|
|
|
|
name = kmalloc(32, GFP_KERNEL);
|
|
|
|
if (NULL == name)
|
|
return -ENOMEM;
|
|
|
|
sprintf(name, "ppc/%s", cur_cpu_spec[cpu_id]->cpu_name);
|
|
|
|
oprof_ppc32_ops.cpu_type = name;
|
|
|
|
model->num_counters = cur_cpu_spec[cpu_id]->num_pmcs;
|
|
|
|
*ops = oprof_ppc32_ops;
|
|
|
|
printk(KERN_INFO "oprofile: using %s performance monitoring.\n",
|
|
oprof_ppc32_ops.cpu_type);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void oprofile_arch_exit(void)
|
|
{
|
|
kfree(oprof_ppc32_ops.cpu_type);
|
|
oprof_ppc32_ops.cpu_type = NULL;
|
|
}
|