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Sundar Iyer9d704c02010-09-15 10:45:51 +01001/*
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>
Sundar Iyer9d704c02010-09-15 10:45:51 +010014
Will Deaconeb504392012-01-20 12:01:12 +010015#include <asm/smp_plat.h>
Sundar Iyer9d704c02010-09-15 10:45:51 +010016
Arnd Bergmanne657bcf2013-03-21 22:51:12 +010017#include "setup.h"
Marc Zyngier5ac21a92011-09-08 13:15:22 +010018
Marc Zyngier5ac21a92011-09-08 13:15:22 +010019/*
20 * platform-specific code to shutdown a CPU
21 *
22 * Called with IRQs disabled
23 */
Stephen Boydb96fc2f2015-10-19 13:05:33 -070024void ux500_cpu_die(unsigned int cpu)
Sundar Iyer9d704c02010-09-15 10:45:51 +010025{
Marc Zyngier5ac21a92011-09-08 13:15:22 +010026 /* directly enter low power state, skipping secure registers */
Sundar Iyer9d704c02010-09-15 10:45:51 +010027 for (;;) {
28 __asm__ __volatile__("dsb\n\t" "wfi\n\t"
29 : : : "memory");
Will Deacon28763482011-08-09 12:21:36 +010030 if (pen_release == cpu_logical_map(cpu)) {
Sundar Iyer9d704c02010-09-15 10:45:51 +010031 /*
32 * OK, proper wakeup, we're done
33 */
34 break;
35 }
36 }
37}