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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 * Move global data into per-processor storage.
41 */
42extern void smp_store_cpu_info(unsigned int cpuid);
43
44/*
45 * Raise an IPI cross call on CPUs in callmap.
46 */
47extern void smp_cross_call(cpumask_t callmap);
48
49/*
50 * Boot a secondary CPU, and assign it the specified idle task.
51 * This also gives us the initial stack to use for this CPU.
52 */
53extern int boot_secondary(unsigned int cpu, struct task_struct *);
54
55/*
56 * Perform platform specific initialisation of the specified CPU.
57 */
58extern void platform_secondary_init(unsigned int cpu);
59
60/*
61 * Initial data for bringing up a secondary CPU.
62 */
63struct secondary_data {
64 unsigned long pgdir;
65 void *stack;
66};
67extern struct secondary_data secondary_data;
68
69#endif /* ifndef __ASM_ARM_SMP_H */