mirror of
https://github.com/FEX-Emu/linux.git
synced 2024-12-22 09:22:37 +00:00
1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
157 lines
3.1 KiB
C
157 lines
3.1 KiB
C
/**
|
|
* @file common.c
|
|
*
|
|
* @remark Copyright 2004 Oprofile Authors
|
|
* @remark Read the file COPYING
|
|
*
|
|
* @author Zwane Mwaikambo
|
|
*/
|
|
|
|
#include <linux/init.h>
|
|
#include <linux/oprofile.h>
|
|
#include <linux/errno.h>
|
|
#include <asm/semaphore.h>
|
|
#include <linux/sysdev.h>
|
|
|
|
#include "op_counter.h"
|
|
#include "op_arm_model.h"
|
|
|
|
static struct op_arm_model_spec *pmu_model;
|
|
static int pmu_enabled;
|
|
static struct semaphore pmu_sem;
|
|
|
|
static int pmu_start(void);
|
|
static int pmu_setup(void);
|
|
static void pmu_stop(void);
|
|
static int pmu_create_files(struct super_block *, struct dentry *);
|
|
|
|
#ifdef CONFIG_PM
|
|
static int pmu_suspend(struct sys_device *dev, pm_message_t state)
|
|
{
|
|
if (pmu_enabled)
|
|
pmu_stop();
|
|
return 0;
|
|
}
|
|
|
|
static int pmu_resume(struct sys_device *dev)
|
|
{
|
|
if (pmu_enabled)
|
|
pmu_start();
|
|
return 0;
|
|
}
|
|
|
|
static struct sysdev_class oprofile_sysclass = {
|
|
set_kset_name("oprofile"),
|
|
.resume = pmu_resume,
|
|
.suspend = pmu_suspend,
|
|
};
|
|
|
|
static struct sys_device device_oprofile = {
|
|
.id = 0,
|
|
.cls = &oprofile_sysclass,
|
|
};
|
|
|
|
static int __init init_driverfs(void)
|
|
{
|
|
int ret;
|
|
|
|
if (!(ret = sysdev_class_register(&oprofile_sysclass)))
|
|
ret = sysdev_register(&device_oprofile);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void exit_driverfs(void)
|
|
{
|
|
sysdev_unregister(&device_oprofile);
|
|
sysdev_class_unregister(&oprofile_sysclass);
|
|
}
|
|
#else
|
|
#define init_driverfs() do { } while (0)
|
|
#define exit_driverfs() do { } while (0)
|
|
#endif /* CONFIG_PM */
|
|
|
|
struct op_counter_config counter_config[OP_MAX_COUNTER];
|
|
|
|
static int pmu_create_files(struct super_block *sb, struct dentry *root)
|
|
{
|
|
unsigned int i;
|
|
|
|
for (i = 0; i < pmu_model->num_counters; i++) {
|
|
struct dentry *dir;
|
|
char buf[2];
|
|
|
|
snprintf(buf, sizeof buf, "%d", i);
|
|
dir = oprofilefs_mkdir(sb, root, buf);
|
|
oprofilefs_create_ulong(sb, dir, "enabled", &counter_config[i].enabled);
|
|
oprofilefs_create_ulong(sb, dir, "event", &counter_config[i].event);
|
|
oprofilefs_create_ulong(sb, dir, "count", &counter_config[i].count);
|
|
oprofilefs_create_ulong(sb, dir, "unit_mask", &counter_config[i].unit_mask);
|
|
oprofilefs_create_ulong(sb, dir, "kernel", &counter_config[i].kernel);
|
|
oprofilefs_create_ulong(sb, dir, "user", &counter_config[i].user);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int pmu_setup(void)
|
|
{
|
|
int ret;
|
|
|
|
spin_lock(&oprofilefs_lock);
|
|
ret = pmu_model->setup_ctrs();
|
|
spin_unlock(&oprofilefs_lock);
|
|
return ret;
|
|
}
|
|
|
|
static int pmu_start(void)
|
|
{
|
|
int ret = -EBUSY;
|
|
|
|
down(&pmu_sem);
|
|
if (!pmu_enabled) {
|
|
ret = pmu_model->start();
|
|
pmu_enabled = !ret;
|
|
}
|
|
up(&pmu_sem);
|
|
return ret;
|
|
}
|
|
|
|
static void pmu_stop(void)
|
|
{
|
|
down(&pmu_sem);
|
|
if (pmu_enabled)
|
|
pmu_model->stop();
|
|
pmu_enabled = 0;
|
|
up(&pmu_sem);
|
|
}
|
|
|
|
int __init pmu_init(struct oprofile_operations *ops, struct op_arm_model_spec *spec)
|
|
{
|
|
init_MUTEX(&pmu_sem);
|
|
|
|
if (spec->init() < 0)
|
|
return -ENODEV;
|
|
|
|
pmu_model = spec;
|
|
init_driverfs();
|
|
ops->create_files = pmu_create_files;
|
|
ops->setup = pmu_setup;
|
|
ops->shutdown = pmu_stop;
|
|
ops->start = pmu_start;
|
|
ops->stop = pmu_stop;
|
|
ops->cpu_type = pmu_model->name;
|
|
printk(KERN_INFO "oprofile: using %s PMU\n", spec->name);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void pmu_exit(void)
|
|
{
|
|
if (pmu_model) {
|
|
exit_driverfs();
|
|
pmu_model = NULL;
|
|
}
|
|
}
|
|
|