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1c51ed4f MD |
1 | /* |
2 | * SMP support for R-Mobile / SH-Mobile | |
3 | * | |
4 | * Copyright (C) 2010 Magnus Damm | |
c413521e | 5 | * Copyright (C) 2011 Paul Mundt |
1c51ed4f MD |
6 | * |
7 | * Based on vexpress, Copyright (C) 2002 ARM Ltd, All Rights Reserved | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License version 2 as | |
11 | * published by the Free Software Foundation. | |
12 | */ | |
13 | #include <linux/init.h> | |
cc61591e MD |
14 | #include <asm/cacheflush.h> |
15 | #include <asm/smp_plat.h> | |
fd44aa5e | 16 | #include "common.h" |
1c51ed4f | 17 | |
cc61591e MD |
18 | extern unsigned long shmobile_smp_fn[]; |
19 | extern unsigned long shmobile_smp_arg[]; | |
20 | extern unsigned long shmobile_smp_mpidr[]; | |
21 | ||
22 | void shmobile_smp_hook(unsigned int cpu, unsigned long fn, unsigned long arg) | |
23 | { | |
24 | shmobile_smp_fn[cpu] = 0; | |
25 | flush_cache_all(); | |
26 | ||
27 | shmobile_smp_mpidr[cpu] = cpu_logical_map(cpu); | |
28 | shmobile_smp_fn[cpu] = fn; | |
29 | shmobile_smp_arg[cpu] = arg; | |
30 | flush_cache_all(); | |
31 | } | |
5c4dfcd6 MD |
32 | |
33 | #ifdef CONFIG_HOTPLUG_CPU | |
787047ee | 34 | bool shmobile_smp_cpu_can_disable(unsigned int cpu) |
5c4dfcd6 | 35 | { |
787047ee | 36 | return true; /* Hotplug of any CPU is supported */ |
5c4dfcd6 MD |
37 | } |
38 | #endif | |
c21af444 MD |
39 | |
40 | bool __init shmobile_smp_init_fallback_ops(void) | |
41 | { | |
42 | /* fallback on PSCI/smp_ops if no other DT based method is detected */ | |
869ec056 AB |
43 | if (!IS_ENABLED(CONFIG_SMP)) |
44 | return false; | |
45 | ||
c21af444 MD |
46 | return platform_can_secondary_boot() ? true : false; |
47 | } |