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/*
* Copyright (c) 2010, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/platform_device.h>
#include <linux/memory.h>
#include <linux/memory_hotplug.h>
#include <linux/module.h>
#include <mach/msm_migrate_pages.h>
static unsigned long unstable_memory_state;
unsigned long get_msm_migrate_pages_status(void)
{
return unstable_memory_state;
}
EXPORT_SYMBOL(get_msm_migrate_pages_status);
#ifdef CONFIG_MEMORY_HOTPLUG
static int migrate_pages_callback(struct notifier_block *self,
unsigned long action, void *arg)
{
int ret = 0;
switch (action) {
case MEM_ONLINE:
unstable_memory_state = action;
break;
case MEM_OFFLINE:
unstable_memory_state = action;
break;
case MEM_GOING_OFFLINE:
case MEM_GOING_ONLINE:
case MEM_CANCEL_ONLINE:
case MEM_CANCEL_OFFLINE:
break;
}
return ret;
}
#endif
static int __devinit msm_migrate_pages_probe(struct platform_device *pdev)
{
#ifdef CONFIG_MEMORY_HOTPLUG
hotplug_memory_notifier(migrate_pages_callback, 0);
#endif
unstable_memory_state = 0;
return 0;
}
static struct platform_driver msm_migrate_pages_driver = {
.probe = msm_migrate_pages_probe,
.driver = {
.name = "msm_migrate_pages",
},
};
static int __init msm_migrate_pages_init(void)
{
return platform_driver_register(&msm_migrate_pages_driver);
}
static void __exit msm_migrate_pages_exit(void)
{
platform_driver_unregister(&msm_migrate_pages_driver);
}
module_init(msm_migrate_pages_init);
module_exit(msm_migrate_pages_exit);
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("Get Status of Unstable Memory Region");
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