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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 union {
69 unsigned long mpu_rgn_szr;
70 unsigned long pgdir;
71 };
72 unsigned long swapper_pg_dir;
73 void *stack;
74};
75extern struct secondary_data secondary_data;
76extern volatile int pen_release;
77extern void secondary_startup(void);
78
79extern int __cpu_disable(void);
80
81extern void __cpu_die(unsigned int cpu);
82extern void cpu_die(void);
83
84extern void arch_send_call_function_single_ipi(int cpu);
85extern void arch_send_call_function_ipi_mask(const struct cpumask *mask);
86extern void arch_send_wakeup_ipi_mask(const struct cpumask *mask);
87
88extern int register_ipi_completion(struct completion *completion, int cpu);
89
90struct smp_operations {
91#ifdef CONFIG_SMP
92 /*
93 * Setup the set of possible CPUs (via set_cpu_possible)
94 */
95 void (*smp_init_cpus)(void);
96 /*
97 * Initialize cpu_possible map, and enable coherency
98 */
99 void (*smp_prepare_cpus)(unsigned int max_cpus);
100
101 /*
102 * Perform platform specific initialisation of the specified CPU.
103 */
104 void (*smp_secondary_init)(unsigned int cpu);
105 /*
106 * Boot a secondary CPU, and assign it the specified idle task.
107 * This also gives us the initial stack to use for this CPU.
108 */
109 int (*smp_boot_secondary)(unsigned int cpu, struct task_struct *idle);
110#ifdef CONFIG_HOTPLUG_CPU
111 int (*cpu_kill)(unsigned int cpu);
112 void (*cpu_die)(unsigned int cpu);
113 int (*cpu_disable)(unsigned int cpu);
114#endif
115#endif
116};
117
118struct of_cpu_method {
119 const char *method;
120 struct smp_operations *ops;
121};
122
123#define CPU_METHOD_OF_DECLARE(name, _method, _ops) \
124 static const struct of_cpu_method __cpu_method_of_table_##name \
125 __used __section(__cpu_method_of_table) \
126 = { .method = _method, .ops = _ops }
127/*
128 * set platform specific SMP operations
129 */
130extern void smp_set_ops(struct smp_operations *);
131
132#endif /* ifndef __ASM_ARM_SMP_H */
1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * arch/arm/include/asm/smp.h
4 *
5 * Copyright (C) 2004-2005 ARM Ltd.
6 */
7#ifndef __ASM_ARM_SMP_H
8#define __ASM_ARM_SMP_H
9
10#include <linux/threads.h>
11#include <linux/cpumask.h>
12#include <linux/thread_info.h>
13
14#ifndef CONFIG_SMP
15# error "<asm/smp.h> included in non-SMP build"
16#endif
17
18#define raw_smp_processor_id() (current_thread_info()->cpu)
19
20struct seq_file;
21
22/*
23 * generate IPI list text
24 */
25extern void show_ipi_list(struct seq_file *, int);
26
27/*
28 * Called from assembly code, this handles an IPI.
29 */
30asmlinkage void do_IPI(int ipinr, struct pt_regs *regs);
31
32/*
33 * Called from C code, this handles an IPI.
34 */
35void handle_IPI(int ipinr, struct pt_regs *regs);
36
37/*
38 * Setup the set of possible CPUs (via set_cpu_possible)
39 */
40extern void smp_init_cpus(void);
41
42/*
43 * Register IPI interrupts with the arch SMP code
44 */
45extern void set_smp_ipi_range(int ipi_base, int nr_ipi);
46
47/*
48 * Called from platform specific assembly code, this is the
49 * secondary CPU entry point.
50 */
51asmlinkage void secondary_start_kernel(void);
52
53
54/*
55 * Initial data for bringing up a secondary CPU.
56 */
57struct secondary_data {
58 union {
59 struct mpu_rgn_info *mpu_rgn_info;
60 u64 pgdir;
61 };
62 unsigned long swapper_pg_dir;
63 void *stack;
64};
65extern struct secondary_data secondary_data;
66extern void secondary_startup(void);
67extern void secondary_startup_arm(void);
68
69extern int __cpu_disable(void);
70
71extern void __cpu_die(unsigned int cpu);
72
73extern void arch_send_call_function_single_ipi(int cpu);
74extern void arch_send_call_function_ipi_mask(const struct cpumask *mask);
75extern void arch_send_wakeup_ipi_mask(const struct cpumask *mask);
76
77extern int register_ipi_completion(struct completion *completion, int cpu);
78
79struct smp_operations {
80#ifdef CONFIG_SMP
81 /*
82 * Setup the set of possible CPUs (via set_cpu_possible)
83 */
84 void (*smp_init_cpus)(void);
85 /*
86 * Initialize cpu_possible map, and enable coherency
87 */
88 void (*smp_prepare_cpus)(unsigned int max_cpus);
89
90 /*
91 * Perform platform specific initialisation of the specified CPU.
92 */
93 void (*smp_secondary_init)(unsigned int cpu);
94 /*
95 * Boot a secondary CPU, and assign it the specified idle task.
96 * This also gives us the initial stack to use for this CPU.
97 */
98 int (*smp_boot_secondary)(unsigned int cpu, struct task_struct *idle);
99#ifdef CONFIG_HOTPLUG_CPU
100 int (*cpu_kill)(unsigned int cpu);
101 void (*cpu_die)(unsigned int cpu);
102 bool (*cpu_can_disable)(unsigned int cpu);
103 int (*cpu_disable)(unsigned int cpu);
104#endif
105#endif
106};
107
108struct of_cpu_method {
109 const char *method;
110 const struct smp_operations *ops;
111};
112
113#define CPU_METHOD_OF_DECLARE(name, _method, _ops) \
114 static const struct of_cpu_method __cpu_method_of_table_##name \
115 __used __section("__cpu_method_of_table") \
116 = { .method = _method, .ops = _ops }
117/*
118 * set platform specific SMP operations
119 */
120extern void smp_set_ops(const struct smp_operations *);
121
122#endif /* ifndef __ASM_ARM_SMP_H */