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69c31b7a SG |
1 | /* |
2 | * Copyright 2011 Freescale Semiconductor, Inc. | |
3 | * Copyright 2011 Linaro Ltd. | |
4 | * | |
5 | * The code contained herein is licensed under the GNU General Public | |
6 | * License. You may obtain a copy of the GNU General Public License | |
7 | * Version 2 or later at the following locations: | |
8 | * | |
9 | * http://www.opensource.org/licenses/gpl-license.html | |
10 | * http://www.gnu.org/copyleft/gpl.html | |
11 | */ | |
12 | ||
13 | #include <linux/errno.h> | |
14 | #include <asm/cacheflush.h> | |
15 | #include <mach/common.h> | |
16 | ||
17 | int platform_cpu_kill(unsigned int cpu) | |
18 | { | |
19 | return 1; | |
20 | } | |
21 | ||
22 | /* | |
23 | * platform-specific code to shutdown a CPU | |
24 | * | |
25 | * Called with IRQs disabled | |
26 | */ | |
27 | void platform_cpu_die(unsigned int cpu) | |
28 | { | |
29 | flush_cache_all(); | |
30 | imx_enable_cpu(cpu, false); | |
31 | cpu_do_idle(); | |
32 | ||
33 | /* We should never return from idle */ | |
34 | panic("cpu %d unexpectedly exit from shutdown\n", cpu); | |
35 | } | |
36 | ||
37 | int platform_cpu_disable(unsigned int cpu) | |
38 | { | |
39 | /* | |
40 | * we don't allow CPU 0 to be shutdown (it is still too special | |
41 | * e.g. clock tick interrupts) | |
42 | */ | |
43 | return cpu == 0 ? -EPERM : 0; | |
44 | } |