linux/arch/arm/mach-ux500/hotplug.c
Arnd Bergmann e657bcf6db ARM: ux500: make remaining headers local
mach/setup.h and mach/devices.h are only needed from inside of mach-ux500
now, so we can simply move them out of the include/mach directory.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2013-04-08 13:59:48 +02:00

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C

/*
* Copyright (C) STMicroelectronics 2009
* Copyright (C) ST-Ericsson SA 2010
*
* License Terms: GNU General Public License v2
* Based on ARM realview platform
*
* Author: Sundar Iyer <sundar.iyer@stericsson.com>
*
*/
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/smp.h>
#include <asm/cacheflush.h>
#include <asm/smp_plat.h>
#include "setup.h"
/*
* platform-specific code to shutdown a CPU
*
* Called with IRQs disabled
*/
void __ref ux500_cpu_die(unsigned int cpu)
{
flush_cache_all();
/* directly enter low power state, skipping secure registers */
for (;;) {
__asm__ __volatile__("dsb\n\t" "wfi\n\t"
: : : "memory");
if (pen_release == cpu_logical_map(cpu)) {
/*
* OK, proper wakeup, we're done
*/
break;
}
}
}