1/*
 2 * SMP support for R-Mobile / SH-Mobile
 3 *
 4 * Copyright (C) 2010  Magnus Damm
 5 *
 6 * Based on realview, Copyright (C) 2002 ARM Ltd, All Rights Reserved
 7 *
 8 * This program is free software; you can redistribute it and/or modify
 9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 */
12#include <linux/kernel.h>
13#include <linux/errno.h>
14#include <linux/smp.h>
15
16int platform_cpu_kill(unsigned int cpu)
17{
18	return 1;
19}
20
21void platform_cpu_die(unsigned int cpu)
22{
23	while (1) {
24		/*
25		 * here's the WFI
26		 */
27		asm(".word	0xe320f003\n"
28		    :
29		    :
30		    : "memory", "cc");
31	}
32}
33
34int platform_cpu_disable(unsigned int cpu)
35{
36	/*
37	 * we don't allow CPU 0 to be shutdown (it is still too special
38	 * e.g. clock tick interrupts)
39	 */
40	return cpu == 0 ? -EPERM : 0;
41}