Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Russell King | 4baa992 | 2008-08-02 10:55:55 +0100 | [diff] [blame] | 2 | * arch/arm/include/asm/smp.h |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | * |
| 4 | * Copyright (C) 2004-2005 ARM Ltd. |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License version 2 as |
| 8 | * published by the Free Software Foundation. |
| 9 | */ |
| 10 | #ifndef __ASM_ARM_SMP_H |
| 11 | #define __ASM_ARM_SMP_H |
| 12 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | #include <linux/threads.h> |
| 14 | #include <linux/cpumask.h> |
| 15 | #include <linux/thread_info.h> |
| 16 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | #ifndef CONFIG_SMP |
Russell King | 4baa992 | 2008-08-02 10:55:55 +0100 | [diff] [blame] | 18 | # error "<asm/smp.h> included in non-SMP build" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | #endif |
| 20 | |
Ingo Molnar | 39c715b | 2005-06-21 17:14:34 -0700 | [diff] [blame] | 21 | #define raw_smp_processor_id() (current_thread_info()->cpu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | struct seq_file; |
| 24 | |
| 25 | /* |
| 26 | * generate IPI list text |
| 27 | */ |
Russell King | f13cd41 | 2010-11-15 14:33:51 +0000 | [diff] [blame] | 28 | extern void show_ipi_list(struct seq_file *, int); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | |
| 30 | /* |
Russell King | 3b6353f | 2005-11-08 15:35:23 +0000 | [diff] [blame] | 31 | * Called from assembly code, this handles an IPI. |
| 32 | */ |
Russell King | ad3b6993 | 2010-11-15 09:42:08 +0000 | [diff] [blame] | 33 | asmlinkage void do_IPI(int ipinr, struct pt_regs *regs); |
Russell King | 3b6353f | 2005-11-08 15:35:23 +0000 | [diff] [blame] | 34 | |
| 35 | /* |
Shawn Guo | 0b5a1b95 | 2011-10-06 15:18:14 +0100 | [diff] [blame] | 36 | * Called from C code, this handles an IPI. |
| 37 | */ |
| 38 | void handle_IPI(int ipinr, struct pt_regs *regs); |
| 39 | |
| 40 | /* |
Russell King | e03cdad | 2009-05-28 14:16:52 +0100 | [diff] [blame] | 41 | * Setup the set of possible CPUs (via set_cpu_possible) |
Russell King | 7bbb794 | 2006-02-16 11:08:09 +0000 | [diff] [blame] | 42 | */ |
| 43 | extern void smp_init_cpus(void); |
| 44 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | |
| 46 | /* |
Russell King | 0f7b332 | 2011-04-03 13:01:30 +0100 | [diff] [blame] | 47 | * Provide a function to raise an IPI cross call on CPUs in callmap. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | */ |
Russell King | 0f7b332 | 2011-04-03 13:01:30 +0100 | [diff] [blame] | 49 | extern void set_smp_cross_call(void (*)(const struct cpumask *, unsigned int)); |
Russell King | dbebb4c | 2005-11-08 10:40:10 +0000 | [diff] [blame] | 50 | |
| 51 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | * Boot a secondary CPU, and assign it the specified idle task. |
| 53 | * This also gives us the initial stack to use for this CPU. |
| 54 | */ |
| 55 | extern int boot_secondary(unsigned int cpu, struct task_struct *); |
| 56 | |
Russell King | e65f38e | 2005-06-18 09:33:31 +0100 | [diff] [blame] | 57 | /* |
Russell King | 3b6353f | 2005-11-08 15:35:23 +0000 | [diff] [blame] | 58 | * Called from platform specific assembly code, this is the |
| 59 | * secondary CPU entry point. |
| 60 | */ |
| 61 | asmlinkage void secondary_start_kernel(void); |
| 62 | |
Russell King | 05c74a6 | 2010-12-03 11:09:48 +0000 | [diff] [blame] | 63 | |
| 64 | /* |
Russell King | e65f38e | 2005-06-18 09:33:31 +0100 | [diff] [blame] | 65 | * Initial data for bringing up a secondary CPU. |
| 66 | */ |
| 67 | struct secondary_data { |
| 68 | unsigned long pgdir; |
Catalin Marinas | d427958 | 2011-05-26 11:22:44 +0100 | [diff] [blame] | 69 | unsigned long swapper_pg_dir; |
Russell King | e65f38e | 2005-06-18 09:33:31 +0100 | [diff] [blame] | 70 | void *stack; |
| 71 | }; |
| 72 | extern struct secondary_data secondary_data; |
Marc Zyngier | 28e8e29 | 2012-06-12 11:16:27 +0100 | [diff] [blame] | 73 | extern volatile int pen_release; |
Russell King | e65f38e | 2005-06-18 09:33:31 +0100 | [diff] [blame] | 74 | |
Russell King | a054a81 | 2005-11-02 22:24:33 +0000 | [diff] [blame] | 75 | extern int __cpu_disable(void); |
Russell King | a054a81 | 2005-11-02 22:24:33 +0000 | [diff] [blame] | 76 | |
| 77 | extern void __cpu_die(unsigned int cpu); |
| 78 | extern void cpu_die(void); |
| 79 | |
Jens Axboe | f6dd9fa | 2008-06-10 20:48:30 +0200 | [diff] [blame] | 80 | extern void arch_send_call_function_single_ipi(int cpu); |
Russell King | 8266810 | 2009-05-17 16:20:18 +0100 | [diff] [blame] | 81 | extern void arch_send_call_function_ipi_mask(const struct cpumask *mask); |
Jens Axboe | f6dd9fa | 2008-06-10 20:48:30 +0200 | [diff] [blame] | 82 | |
Marc Zyngier | abcee5f | 2011-09-08 09:06:10 +0100 | [diff] [blame] | 83 | struct smp_operations { |
| 84 | #ifdef CONFIG_SMP |
| 85 | /* |
| 86 | * Setup the set of possible CPUs (via set_cpu_possible) |
| 87 | */ |
| 88 | void (*smp_init_cpus)(void); |
| 89 | /* |
| 90 | * Initialize cpu_possible map, and enable coherency |
| 91 | */ |
| 92 | void (*smp_prepare_cpus)(unsigned int max_cpus); |
| 93 | |
| 94 | /* |
| 95 | * Perform platform specific initialisation of the specified CPU. |
| 96 | */ |
| 97 | void (*smp_secondary_init)(unsigned int cpu); |
| 98 | /* |
| 99 | * Boot a secondary CPU, and assign it the specified idle task. |
| 100 | * This also gives us the initial stack to use for this CPU. |
| 101 | */ |
| 102 | int (*smp_boot_secondary)(unsigned int cpu, struct task_struct *idle); |
| 103 | #ifdef CONFIG_HOTPLUG_CPU |
| 104 | int (*cpu_kill)(unsigned int cpu); |
| 105 | void (*cpu_die)(unsigned int cpu); |
| 106 | int (*cpu_disable)(unsigned int cpu); |
| 107 | #endif |
| 108 | #endif |
| 109 | }; |
| 110 | |
| 111 | /* |
| 112 | * set platform specific SMP operations |
| 113 | */ |
| 114 | extern void smp_set_ops(struct smp_operations *); |
| 115 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 116 | #endif /* ifndef __ASM_ARM_SMP_H */ |