1/*
2 * Copyright (C) STMicroelectronics 2009
3 * Copyright (C) ST-Ericsson SA 2010
4 *
5 * License Terms: GNU General Public License v2
6 *	Based on ARM realview platform
7 *
8 * Author: Sundar Iyer <sundar.iyer@stericsson.com>
9 *
10 */
11#include <linux/kernel.h>
12#include <linux/errno.h>
13#include <linux/smp.h>
14
15#include <asm/smp_plat.h>
16
17#include "setup.h"
18
19/*
20 * platform-specific code to shutdown a CPU
21 *
22 * Called with IRQs disabled
23 */
24void __ref ux500_cpu_die(unsigned int cpu)
25{
26	/* directly enter low power state, skipping secure registers */
27	for (;;) {
28		__asm__ __volatile__("dsb\n\t" "wfi\n\t"
29				: : : "memory");
30		if (pen_release == cpu_logical_map(cpu)) {
31			/*
32			 * OK, proper wakeup, we're done
33			 */
34			break;
35		}
36	}
37}
38