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Linux kernel mirror (for testing)
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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 * Called from platform specific assembly code, this is the
53 * secondary CPU entry point.
54 */
55asmlinkage void secondary_start_kernel(void);
56
57
58/*
59 * Initial data for bringing up a secondary CPU.
60 */
61struct secondary_data {
62 union {
63 struct mpu_rgn_info *mpu_rgn_info;
64 u64 pgdir;
65 };
66 unsigned long swapper_pg_dir;
67 void *stack;
68};
69extern struct secondary_data secondary_data;
70extern void secondary_startup(void);
71extern void secondary_startup_arm(void);
72
73extern int __cpu_disable(void);
74
75extern void __cpu_die(unsigned int cpu);
76
77extern void arch_send_call_function_single_ipi(int cpu);
78extern void arch_send_call_function_ipi_mask(const struct cpumask *mask);
79extern void arch_send_wakeup_ipi_mask(const struct cpumask *mask);
80
81extern int register_ipi_completion(struct completion *completion, int cpu);
82
83struct smp_operations {
84#ifdef CONFIG_SMP
85 /*
86 * Setup the set of possible CPUs (via set_cpu_possible)
87 */
88 void (*smp_init_cpus)(void);
89 /*
90 * Initialize cpu_possible map, and enable coherency
91 */
92 void (*smp_prepare_cpus)(unsigned int max_cpus);
93
94 /*
95 * Perform platform specific initialisation of the specified CPU.
96 */
97 void (*smp_secondary_init)(unsigned int cpu);
98 /*
99 * Boot a secondary CPU, and assign it the specified idle task.
100 * This also gives us the initial stack to use for this CPU.
101 */
102 int (*smp_boot_secondary)(unsigned int cpu, struct task_struct *idle);
103#ifdef CONFIG_HOTPLUG_CPU
104 int (*cpu_kill)(unsigned int cpu);
105 void (*cpu_die)(unsigned int cpu);
106 bool (*cpu_can_disable)(unsigned int cpu);
107 int (*cpu_disable)(unsigned int cpu);
108#endif
109#endif
110};
111
112struct of_cpu_method {
113 const char *method;
114 const struct smp_operations *ops;
115};
116
117#define CPU_METHOD_OF_DECLARE(name, _method, _ops) \
118 static const struct of_cpu_method __cpu_method_of_table_##name \
119 __used __section(__cpu_method_of_table) \
120 = { .method = _method, .ops = _ops }
121/*
122 * set platform specific SMP operations
123 */
124extern void smp_set_ops(const struct smp_operations *);
125
126#endif /* ifndef __ASM_ARM_SMP_H */