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1c51ed4f MD |
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 | ||
16 | int platform_cpu_kill(unsigned int cpu) | |
17 | { | |
18 | return 1; | |
19 | } | |
20 | ||
21 | void 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 | ||
34 | int 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 | } |