Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/include/asm-arm/smp.h |
| 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 | |
| 17 | #include <asm/arch/smp.h> |
| 18 | |
| 19 | #ifndef CONFIG_SMP |
| 20 | # error "<asm-arm/smp.h> included in non-SMP build" |
| 21 | #endif |
| 22 | |
Ingo Molnar | 39c715b | 2005-06-21 17:14:34 -0700 | [diff] [blame] | 23 | #define raw_smp_processor_id() (current_thread_info()->cpu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | /* |
| 26 | * at the moment, there's not a big penalty for changing CPUs |
| 27 | * (the >big< penalty is running SMP in the first place) |
| 28 | */ |
| 29 | #define PROC_CHANGE_PENALTY 15 |
| 30 | |
| 31 | struct seq_file; |
| 32 | |
| 33 | /* |
| 34 | * generate IPI list text |
| 35 | */ |
| 36 | extern void show_ipi_list(struct seq_file *p); |
| 37 | |
| 38 | /* |
Russell King | 3b6353f | 2005-11-08 15:35:23 +0000 | [diff] [blame] | 39 | * Called from assembly code, this handles an IPI. |
| 40 | */ |
| 41 | asmlinkage void do_IPI(struct pt_regs *regs); |
| 42 | |
| 43 | /* |
Russell King | 7bbb794 | 2006-02-16 11:08:09 +0000 | [diff] [blame] | 44 | * Setup the SMP cpu_possible_map |
| 45 | */ |
| 46 | extern void smp_init_cpus(void); |
| 47 | |
| 48 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | * Move global data into per-processor storage. |
| 50 | */ |
| 51 | extern void smp_store_cpu_info(unsigned int cpuid); |
| 52 | |
| 53 | /* |
| 54 | * Raise an IPI cross call on CPUs in callmap. |
| 55 | */ |
| 56 | extern void smp_cross_call(cpumask_t callmap); |
| 57 | |
| 58 | /* |
Russell King | dbebb4c | 2005-11-08 10:40:10 +0000 | [diff] [blame] | 59 | * Broadcast a timer interrupt to the other CPUs. |
| 60 | */ |
| 61 | extern void smp_send_timer(void); |
| 62 | |
| 63 | /* |
Catalin Marinas | 3e45999 | 2008-02-04 17:28:56 +0100 | [diff] [blame^] | 64 | * Broadcast a clock event to other CPUs. |
| 65 | */ |
| 66 | extern void smp_timer_broadcast(cpumask_t mask); |
| 67 | |
| 68 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | * Boot a secondary CPU, and assign it the specified idle task. |
| 70 | * This also gives us the initial stack to use for this CPU. |
| 71 | */ |
| 72 | extern int boot_secondary(unsigned int cpu, struct task_struct *); |
| 73 | |
Russell King | e65f38e | 2005-06-18 09:33:31 +0100 | [diff] [blame] | 74 | /* |
Russell King | 3b6353f | 2005-11-08 15:35:23 +0000 | [diff] [blame] | 75 | * Called from platform specific assembly code, this is the |
| 76 | * secondary CPU entry point. |
| 77 | */ |
| 78 | asmlinkage void secondary_start_kernel(void); |
| 79 | |
| 80 | /* |
Russell King | e65f38e | 2005-06-18 09:33:31 +0100 | [diff] [blame] | 81 | * Perform platform specific initialisation of the specified CPU. |
| 82 | */ |
| 83 | extern void platform_secondary_init(unsigned int cpu); |
| 84 | |
| 85 | /* |
| 86 | * Initial data for bringing up a secondary CPU. |
| 87 | */ |
| 88 | struct secondary_data { |
| 89 | unsigned long pgdir; |
| 90 | void *stack; |
| 91 | }; |
| 92 | extern struct secondary_data secondary_data; |
| 93 | |
Russell King | a054a81 | 2005-11-02 22:24:33 +0000 | [diff] [blame] | 94 | extern int __cpu_disable(void); |
| 95 | extern int mach_cpu_disable(unsigned int cpu); |
| 96 | |
| 97 | extern void __cpu_die(unsigned int cpu); |
| 98 | extern void cpu_die(void); |
| 99 | |
| 100 | extern void platform_cpu_die(unsigned int cpu); |
| 101 | extern int platform_cpu_kill(unsigned int cpu); |
| 102 | extern void platform_cpu_enable(unsigned int cpu); |
| 103 | |
Catalin Marinas | 3e45999 | 2008-02-04 17:28:56 +0100 | [diff] [blame^] | 104 | /* |
| 105 | * Local timer interrupt handling function (can be IPI'ed). |
| 106 | */ |
| 107 | extern void local_timer_interrupt(void); |
| 108 | |
Russell King | 37ee16a | 2005-11-08 19:08:05 +0000 | [diff] [blame] | 109 | #ifdef CONFIG_LOCAL_TIMERS |
| 110 | /* |
| 111 | * Setup a local timer interrupt for a CPU. |
| 112 | */ |
| 113 | extern void local_timer_setup(unsigned int cpu); |
| 114 | |
| 115 | /* |
| 116 | * Stop a local timer interrupt. |
| 117 | */ |
| 118 | extern void local_timer_stop(unsigned int cpu); |
| 119 | |
| 120 | /* |
| 121 | * Platform provides this to acknowledge a local timer IRQ |
| 122 | */ |
| 123 | extern int local_timer_ack(void); |
| 124 | |
| 125 | #else |
| 126 | |
| 127 | static inline void local_timer_setup(unsigned int cpu) |
| 128 | { |
| 129 | } |
| 130 | |
| 131 | static inline void local_timer_stop(unsigned int cpu) |
| 132 | { |
| 133 | } |
| 134 | |
| 135 | #endif |
| 136 | |
| 137 | /* |
| 138 | * show local interrupt info |
| 139 | */ |
| 140 | extern void show_local_irqs(struct seq_file *); |
| 141 | |
| 142 | /* |
| 143 | * Called from assembly, this is the local timer IRQ handler |
| 144 | */ |
| 145 | asmlinkage void do_local_timer(struct pt_regs *); |
| 146 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | #endif /* ifndef __ASM_ARM_SMP_H */ |