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Linux kernel mirror (for testing)
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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
13#include <linux/config.h>
14#include <linux/threads.h>
15#include <linux/cpumask.h>
16#include <linux/thread_info.h>
17
18#include <asm/arch/smp.h>
19
20#ifndef CONFIG_SMP
21# error "<asm-arm/smp.h> included in non-SMP build"
22#endif
23
24#define raw_smp_processor_id() (current_thread_info()->cpu)
25
26/*
27 * at the moment, there's not a big penalty for changing CPUs
28 * (the >big< penalty is running SMP in the first place)
29 */
30#define PROC_CHANGE_PENALTY 15
31
32struct seq_file;
33
34/*
35 * generate IPI list text
36 */
37extern void show_ipi_list(struct seq_file *p);
38
39/*
40 * Called from assembly code, this handles an IPI.
41 */
42asmlinkage void do_IPI(struct pt_regs *regs);
43
44/*
45 * Move global data into per-processor storage.
46 */
47extern void smp_store_cpu_info(unsigned int cpuid);
48
49/*
50 * Raise an IPI cross call on CPUs in callmap.
51 */
52extern void smp_cross_call(cpumask_t callmap);
53
54/*
55 * Broadcast a timer interrupt to the other CPUs.
56 */
57extern void smp_send_timer(void);
58
59/*
60 * Boot a secondary CPU, and assign it the specified idle task.
61 * This also gives us the initial stack to use for this CPU.
62 */
63extern int boot_secondary(unsigned int cpu, struct task_struct *);
64
65/*
66 * Called from platform specific assembly code, this is the
67 * secondary CPU entry point.
68 */
69asmlinkage void secondary_start_kernel(void);
70
71/*
72 * Perform platform specific initialisation of the specified CPU.
73 */
74extern void platform_secondary_init(unsigned int cpu);
75
76/*
77 * Initial data for bringing up a secondary CPU.
78 */
79struct secondary_data {
80 unsigned long pgdir;
81 void *stack;
82};
83extern struct secondary_data secondary_data;
84
85extern int __cpu_disable(void);
86extern int mach_cpu_disable(unsigned int cpu);
87
88extern void __cpu_die(unsigned int cpu);
89extern void cpu_die(void);
90
91extern void platform_cpu_die(unsigned int cpu);
92extern int platform_cpu_kill(unsigned int cpu);
93extern void platform_cpu_enable(unsigned int cpu);
94
95#ifdef CONFIG_LOCAL_TIMERS
96/*
97 * Setup a local timer interrupt for a CPU.
98 */
99extern void local_timer_setup(unsigned int cpu);
100
101/*
102 * Stop a local timer interrupt.
103 */
104extern void local_timer_stop(unsigned int cpu);
105
106/*
107 * Platform provides this to acknowledge a local timer IRQ
108 */
109extern int local_timer_ack(void);
110
111#else
112
113static inline void local_timer_setup(unsigned int cpu)
114{
115}
116
117static inline void local_timer_stop(unsigned int cpu)
118{
119}
120
121#endif
122
123/*
124 * show local interrupt info
125 */
126extern void show_local_irqs(struct seq_file *);
127
128/*
129 * Called from assembly, this is the local timer IRQ handler
130 */
131asmlinkage void do_local_timer(struct pt_regs *);
132
133#endif /* ifndef __ASM_ARM_SMP_H */