projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 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 | } |