blob: 2f6af259015d7782d2ebdd8caeade64370e4090f (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
|
/*
* 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 <mach/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;
}
}
}
|
