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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 C code, this handles an IPI.
29 */
30void handle_IPI(int ipinr, struct pt_regs *regs);
31
32/*
33 * Setup the set of possible CPUs (via set_cpu_possible)
34 */
35extern void smp_init_cpus(void);
36
37/*
38 * Register IPI interrupts with the arch SMP code
39 */
40extern void set_smp_ipi_range(int ipi_base, int nr_ipi);
41
42/*
43 * Called from platform specific assembly code, this is the
44 * secondary CPU entry point.
45 */
46asmlinkage void secondary_start_kernel(struct task_struct *task);
47
48
49/*
50 * Initial data for bringing up a secondary CPU.
51 */
52struct secondary_data {
53 union {
54 struct mpu_rgn_info *mpu_rgn_info;
55 u64 pgdir;
56 };
57 unsigned long swapper_pg_dir;
58 void *stack;
59 struct task_struct *task;
60};
61extern struct secondary_data secondary_data;
62extern void secondary_startup(void);
63extern void secondary_startup_arm(void);
64
65extern int __cpu_disable(void);
66
67static inline void __cpu_die(unsigned int cpu) { }
68
69extern void arch_send_call_function_single_ipi(int cpu);
70extern void arch_send_call_function_ipi_mask(const struct cpumask *mask);
71extern void arch_send_wakeup_ipi_mask(const struct cpumask *mask);
72
73extern int register_ipi_completion(struct completion *completion, int cpu);
74
75struct smp_operations {
76#ifdef CONFIG_SMP
77 /*
78 * Setup the set of possible CPUs (via set_cpu_possible)
79 */
80 void (*smp_init_cpus)(void);
81 /*
82 * Initialize cpu_possible map, and enable coherency
83 */
84 void (*smp_prepare_cpus)(unsigned int max_cpus);
85
86 /*
87 * Perform platform specific initialisation of the specified CPU.
88 */
89 void (*smp_secondary_init)(unsigned int cpu);
90 /*
91 * Boot a secondary CPU, and assign it the specified idle task.
92 * This also gives us the initial stack to use for this CPU.
93 */
94 int (*smp_boot_secondary)(unsigned int cpu, struct task_struct *idle);
95#ifdef CONFIG_HOTPLUG_CPU
96 int (*cpu_kill)(unsigned int cpu);
97 void (*cpu_die)(unsigned int cpu);
98 bool (*cpu_can_disable)(unsigned int cpu);
99 int (*cpu_disable)(unsigned int cpu);
100#endif
101#endif
102};
103
104struct of_cpu_method {
105 const char *method;
106 const struct smp_operations *ops;
107};
108
109#define CPU_METHOD_OF_DECLARE(name, _method, _ops) \
110 static const struct of_cpu_method __cpu_method_of_table_##name \
111 __used __section("__cpu_method_of_table") \
112 = { .method = _method, .ops = _ops }
113/*
114 * set platform specific SMP operations
115 */
116extern void smp_set_ops(const struct smp_operations *);
117
118#endif /* ifndef __ASM_ARM_SMP_H */
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 unsigned long mpu_rgn_szr;
64 u64 pgdir;
65 };
66 unsigned long swapper_pg_dir;
67 void *stack;
68};
69extern struct secondary_data secondary_data;
70extern volatile int pen_release;
71extern void secondary_startup(void);
72extern void secondary_startup_arm(void);
73
74extern int __cpu_disable(void);
75
76extern void __cpu_die(unsigned int cpu);
77
78extern void arch_send_call_function_single_ipi(int cpu);
79extern void arch_send_call_function_ipi_mask(const struct cpumask *mask);
80extern void arch_send_wakeup_ipi_mask(const struct cpumask *mask);
81
82extern int register_ipi_completion(struct completion *completion, int cpu);
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 bool (*cpu_can_disable)(unsigned int cpu);
108 int (*cpu_disable)(unsigned int cpu);
109#endif
110#endif
111};
112
113struct of_cpu_method {
114 const char *method;
115 const struct smp_operations *ops;
116};
117
118#define CPU_METHOD_OF_DECLARE(name, _method, _ops) \
119 static const struct of_cpu_method __cpu_method_of_table_##name \
120 __used __section(__cpu_method_of_table) \
121 = { .method = _method, .ops = _ops }
122/*
123 * set platform specific SMP operations
124 */
125extern void smp_set_ops(const struct smp_operations *);
126
127#endif /* ifndef __ASM_ARM_SMP_H */