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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/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
23#define raw_smp_processor_id() (current_thread_info()->cpu)
24
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
31struct seq_file;
32
33/*
34 * generate IPI list text
35 */
36extern void show_ipi_list(struct seq_file *p);
37
38/*
39 * Called from assembly code, this handles an IPI.
40 */
41asmlinkage void do_IPI(struct pt_regs *regs);
42
43/*
44 * Setup the SMP cpu_possible_map
45 */
46extern void smp_init_cpus(void);
47
48/*
49 * 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/*
59 * Broadcast a timer interrupt to the other CPUs.
60 */
61extern void smp_send_timer(void);
62
63/*
64 * Broadcast a clock event to other CPUs.
65 */
66extern void smp_timer_broadcast(cpumask_t mask);
67
68/*
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 */
72extern int boot_secondary(unsigned int cpu, struct task_struct *);
73
74/*
75 * Called from platform specific assembly code, this is the
76 * secondary CPU entry point.
77 */
78asmlinkage void secondary_start_kernel(void);
79
80/*
81 * 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
94extern 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
104/*
105 * Local timer interrupt handling function (can be IPI'ed).
106 */
107extern void local_timer_interrupt(void);
108
109#ifdef CONFIG_LOCAL_TIMERS
110
111/*
112 * Stop a local timer interrupt.
113 */
114extern void local_timer_stop(unsigned int cpu);
115
116/*
117 * Platform provides this to acknowledge a local timer IRQ
118 */
119extern int local_timer_ack(void);
120
121#else
122
123static inline void local_timer_stop(unsigned int cpu)
124{
125}
126
127#endif
128
129/*
130 * Setup a local timer interrupt for a CPU.
131 */
132extern void local_timer_setup(unsigned int cpu);
133
134/*
135 * show local interrupt info
136 */
137extern void show_local_irqs(struct seq_file *);
138
139/*
140 * Called from assembly, this is the local timer IRQ handler
141 */
142asmlinkage void do_local_timer(struct pt_regs *);
143
144#endif /* ifndef __ASM_ARM_SMP_H */