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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Russell King4baa9922008-08-02 10:55:55 +01002 * arch/arm/include/asm/smp.h
Linus Torvalds1da177e2005-04-16 15:20:36 -07003 *
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 Torvalds1da177e2005-04-16 15:20:36 -070013#include <linux/threads.h>
14#include <linux/cpumask.h>
15#include <linux/thread_info.h>
16
Russell Kinga09e64f2008-08-05 16:14:15 +010017#include <mach/smp.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070018
19#ifndef CONFIG_SMP
Russell King4baa9922008-08-02 10:55:55 +010020# error "<asm/smp.h> included in non-SMP build"
Linus Torvalds1da177e2005-04-16 15:20:36 -070021#endif
22
Ingo Molnar39c715b2005-06-21 17:14:34 -070023#define raw_smp_processor_id() (current_thread_info()->cpu)
Linus Torvalds1da177e2005-04-16 15:20:36 -070024
Linus Torvalds1da177e2005-04-16 15:20:36 -070025/*
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
31struct seq_file;
32
33/*
34 * generate IPI list text
35 */
36extern void show_ipi_list(struct seq_file *p);
37
38/*
Russell King3b6353f2005-11-08 15:35:23 +000039 * Called from assembly code, this handles an IPI.
40 */
41asmlinkage void do_IPI(struct pt_regs *regs);
42
43/*
Russell King7bbb7942006-02-16 11:08:09 +000044 * Setup the SMP cpu_possible_map
45 */
46extern void smp_init_cpus(void);
47
48/*
Linus Torvalds1da177e2005-04-16 15:20:36 -070049 * Move global data into per-processor storage.
50 */
51extern void smp_store_cpu_info(unsigned int cpuid);
52
53/*
54 * Raise an IPI cross call on CPUs in callmap.
55 */
56extern void smp_cross_call(cpumask_t callmap);
57
58/*
Russell Kingdbebb4c2005-11-08 10:40:10 +000059 * Broadcast a timer interrupt to the other CPUs.
60 */
61extern void smp_send_timer(void);
62
63/*
Catalin Marinas3e459992008-02-04 17:28:56 +010064 * Broadcast a clock event to other CPUs.
65 */
66extern void smp_timer_broadcast(cpumask_t mask);
67
68/*
Linus Torvalds1da177e2005-04-16 15:20:36 -070069 * 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 */
72extern int boot_secondary(unsigned int cpu, struct task_struct *);
73
Russell Kinge65f38e2005-06-18 09:33:31 +010074/*
Russell King3b6353f2005-11-08 15:35:23 +000075 * Called from platform specific assembly code, this is the
76 * secondary CPU entry point.
77 */
78asmlinkage void secondary_start_kernel(void);
79
80/*
Russell Kinge65f38e2005-06-18 09:33:31 +010081 * Perform platform specific initialisation of the specified CPU.
82 */
83extern void platform_secondary_init(unsigned int cpu);
84
85/*
86 * Initial data for bringing up a secondary CPU.
87 */
88struct secondary_data {
89 unsigned long pgdir;
90 void *stack;
91};
92extern struct secondary_data secondary_data;
93
Russell Kinga054a812005-11-02 22:24:33 +000094extern int __cpu_disable(void);
95extern int mach_cpu_disable(unsigned int cpu);
96
97extern void __cpu_die(unsigned int cpu);
98extern void cpu_die(void);
99
100extern void platform_cpu_die(unsigned int cpu);
101extern int platform_cpu_kill(unsigned int cpu);
102extern void platform_cpu_enable(unsigned int cpu);
103
Jens Axboef6dd9fa2008-06-10 20:48:30 +0200104extern void arch_send_call_function_single_ipi(int cpu);
105extern void arch_send_call_function_ipi(cpumask_t mask);
106
Catalin Marinas3e459992008-02-04 17:28:56 +0100107/*
108 * Local timer interrupt handling function (can be IPI'ed).
109 */
110extern void local_timer_interrupt(void);
111
Russell King37ee16a2005-11-08 19:08:05 +0000112#ifdef CONFIG_LOCAL_TIMERS
Russell King37ee16a2005-11-08 19:08:05 +0000113
114/*
115 * Stop a local timer interrupt.
116 */
Catalin Marinasebac6542008-12-01 14:54:57 +0000117extern void local_timer_stop(void);
Russell King37ee16a2005-11-08 19:08:05 +0000118
119/*
120 * Platform provides this to acknowledge a local timer IRQ
121 */
122extern int local_timer_ack(void);
123
124#else
125
Catalin Marinasebac6542008-12-01 14:54:57 +0000126static inline void local_timer_stop(void)
Russell King37ee16a2005-11-08 19:08:05 +0000127{
128}
129
130#endif
131
132/*
Catalin Marinasa8655e82008-02-04 17:30:57 +0100133 * Setup a local timer interrupt for a CPU.
134 */
Catalin Marinasebac6542008-12-01 14:54:57 +0000135extern void local_timer_setup(void);
Catalin Marinasa8655e82008-02-04 17:30:57 +0100136
137/*
Russell King37ee16a2005-11-08 19:08:05 +0000138 * show local interrupt info
139 */
140extern void show_local_irqs(struct seq_file *);
141
142/*
143 * Called from assembly, this is the local timer IRQ handler
144 */
145asmlinkage void do_local_timer(struct pt_regs *);
146
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147#endif /* ifndef __ASM_ARM_SMP_H */