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1/*
2 * arch/arm/include/asm/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#ifndef CONFIG_SMP
18# error "<asm/smp.h> included in non-SMP build"
19#endif
20
21#define raw_smp_processor_id() (current_thread_info()->cpu)
22
23struct seq_file;
24
25/*
26 * generate IPI list text
27 */
28extern void show_ipi_list(struct seq_file *, int);
29
30/*
31 * Called from assembly code, this handles an IPI.
32 */
33asmlinkage void do_IPI(int ipinr, struct pt_regs *regs);
34
35/*
36 * Called from C code, this handles an IPI.
37 */
38void handle_IPI(int ipinr, struct pt_regs *regs);
39
40/*
41 * Setup the set of possible CPUs (via set_cpu_possible)
42 */
43extern void smp_init_cpus(void);
44
45
46/*
47 * Provide a function to raise an IPI cross call on CPUs in callmap.
48 */
49extern void set_smp_cross_call(void (*)(const struct cpumask *, unsigned int));
50
51/*
52 * Boot a secondary CPU, and assign it the specified idle task.
53 * This also gives us the initial stack to use for this CPU.
54 */
55extern int boot_secondary(unsigned int cpu, struct task_struct *);
56
57/*
58 * Called from platform specific assembly code, this is the
59 * secondary CPU entry point.
60 */
61asmlinkage void secondary_start_kernel(void);
62
63
64/*
65 * Initial data for bringing up a secondary CPU.
66 */
67struct secondary_data {
68 unsigned long pgdir;
69 unsigned long swapper_pg_dir;
70 void *stack;
71};
72extern struct secondary_data secondary_data;
73extern volatile int pen_release;
74
75extern int __cpu_disable(void);
76
77extern void __cpu_die(unsigned int cpu);
78extern void cpu_die(void);
79
80extern void arch_send_call_function_single_ipi(int cpu);
81extern void arch_send_call_function_ipi_mask(const struct cpumask *mask);
82extern void arch_send_wakeup_ipi_mask(const struct cpumask *mask);
83
84struct smp_operations {
85#ifdef CONFIG_SMP
86 /*
87 * Setup the set of possible CPUs (via set_cpu_possible)
88 */
89 void (*smp_init_cpus)(void);
90 /*
91 * Initialize cpu_possible map, and enable coherency
92 */
93 void (*smp_prepare_cpus)(unsigned int max_cpus);
94
95 /*
96 * Perform platform specific initialisation of the specified CPU.
97 */
98 void (*smp_secondary_init)(unsigned int cpu);
99 /*
100 * Boot a secondary CPU, and assign it the specified idle task.
101 * This also gives us the initial stack to use for this CPU.
102 */
103 int (*smp_boot_secondary)(unsigned int cpu, struct task_struct *idle);
104#ifdef CONFIG_HOTPLUG_CPU
105 int (*cpu_kill)(unsigned int cpu);
106 void (*cpu_die)(unsigned int cpu);
107 int (*cpu_disable)(unsigned int cpu);
108#endif
109#endif
110};
111
112/*
113 * set platform specific SMP operations
114 */
115extern void smp_set_ops(struct smp_operations *);
116
117#endif /* ifndef __ASM_ARM_SMP_H */