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/*
* arch/arm/mach-tegra/hotplug.c
*
* CPU hotplug support for Tegra SoCs
*
* Copyright (c) 2009, NVIDIA Corporation.
*
* 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.
*
* 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.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <linux/init.h>
#include <linux/smp.h>
#include <linux/completion.h>
#include <asm/cacheflush.h>
static DECLARE_COMPLETION(cpu_killed);
extern void cpu_ap20_do_lp2(void);
int platform_cpu_kill(unsigned int cpu)
{
return wait_for_completion_timeout(&cpu_killed, 5000);
}
void platform_cpu_die(unsigned int cpu)
{
flush_cache_all();
preempt_enable_no_resched();
complete(&cpu_killed);
cpu_ap20_do_lp2();
}
int mach_cpu_disable(unsigned int cpu)
{
return (cpu==0) ? -EPERM : 0;
}
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