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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Russell King4baa9922008-08-02 10:55:55 +01002 * arch/arm/include/asm/smp.h
Linus Torvalds1da177e2005-04-16 15:20:36 -07003 *
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
Linus Torvalds1da177e2005-04-16 15:20:36 -070013#include <linux/threads.h>
14#include <linux/cpumask.h>
15#include <linux/thread_info.h>
16
Linus Torvalds1da177e2005-04-16 15:20:36 -070017#ifndef CONFIG_SMP
Russell King4baa9922008-08-02 10:55:55 +010018# error "<asm/smp.h> included in non-SMP build"
Linus Torvalds1da177e2005-04-16 15:20:36 -070019#endif
20
Ingo Molnar39c715b2005-06-21 17:14:34 -070021#define raw_smp_processor_id() (current_thread_info()->cpu)
Linus Torvalds1da177e2005-04-16 15:20:36 -070022
Linus Torvalds1da177e2005-04-16 15:20:36 -070023struct seq_file;
24
25/*
26 * generate IPI list text
27 */
Russell Kingf13cd412010-11-15 14:33:51 +000028extern void show_ipi_list(struct seq_file *, int);
Linus Torvalds1da177e2005-04-16 15:20:36 -070029
30/*
Russell King3b6353f2005-11-08 15:35:23 +000031 * Called from assembly code, this handles an IPI.
32 */
Russell Kingad3b69932010-11-15 09:42:08 +000033asmlinkage void do_IPI(int ipinr, struct pt_regs *regs);
Russell King3b6353f2005-11-08 15:35:23 +000034
35/*
Shawn Guo0b5a1b952011-10-06 15:18:14 +010036 * Called from C code, this handles an IPI.
37 */
38void handle_IPI(int ipinr, struct pt_regs *regs);
39
40/*
Russell Kinge03cdad2009-05-28 14:16:52 +010041 * Setup the set of possible CPUs (via set_cpu_possible)
Russell King7bbb7942006-02-16 11:08:09 +000042 */
43extern void smp_init_cpus(void);
44
Linus Torvalds1da177e2005-04-16 15:20:36 -070045
46/*
Russell King0f7b3322011-04-03 13:01:30 +010047 * Provide a function to raise an IPI cross call on CPUs in callmap.
Linus Torvalds1da177e2005-04-16 15:20:36 -070048 */
Russell King0f7b3322011-04-03 13:01:30 +010049extern void set_smp_cross_call(void (*)(const struct cpumask *, unsigned int));
Russell Kingdbebb4c2005-11-08 10:40:10 +000050
51/*
Russell King3b6353f2005-11-08 15:35:23 +000052 * Called from platform specific assembly code, this is the
53 * secondary CPU entry point.
54 */
55asmlinkage void secondary_start_kernel(void);
56
Russell King05c74a62010-12-03 11:09:48 +000057
58/*
Russell Kinge65f38e2005-06-18 09:33:31 +010059 * Initial data for bringing up a secondary CPU.
60 */
61struct secondary_data {
Jonathan Austineb083752013-02-22 18:51:30 +000062 union {
63 unsigned long mpu_rgn_szr;
Russell Kingb2c3e382015-04-04 20:09:46 +010064 u64 pgdir;
Jonathan Austineb083752013-02-22 18:51:30 +000065 };
Catalin Marinasd4279582011-05-26 11:22:44 +010066 unsigned long swapper_pg_dir;
Russell Kinge65f38e2005-06-18 09:33:31 +010067 void *stack;
68};
69extern struct secondary_data secondary_data;
Marc Zyngier28e8e292012-06-12 11:16:27 +010070extern volatile int pen_release;
Arnd Bergmann1146b602014-03-16 18:04:54 +010071extern void secondary_startup(void);
Yingjoe Chen29d2e562015-05-18 09:06:13 +010072extern void secondary_startup_arm(void);
Russell Kinge65f38e2005-06-18 09:33:31 +010073
Russell Kinga054a812005-11-02 22:24:33 +000074extern int __cpu_disable(void);
Russell Kinga054a812005-11-02 22:24:33 +000075
76extern void __cpu_die(unsigned int cpu);
Russell Kinga054a812005-11-02 22:24:33 +000077
Jens Axboef6dd9fa2008-06-10 20:48:30 +020078extern void arch_send_call_function_single_ipi(int cpu);
Russell King82668102009-05-17 16:20:18 +010079extern void arch_send_call_function_ipi_mask(const struct cpumask *mask);
Shawn Guob62655f2012-11-06 03:48:40 +010080extern void arch_send_wakeup_ipi_mask(const struct cpumask *mask);
Jens Axboef6dd9fa2008-06-10 20:48:30 +020081
Nicolas Pitre5135d872012-11-27 21:54:41 -050082extern int register_ipi_completion(struct completion *completion, int cpu);
83
Marc Zyngierabcee5f2011-09-08 09:06:10 +010084struct 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);
Stephen Boyd787047e2015-07-29 00:34:48 +0100107 bool (*cpu_can_disable)(unsigned int cpu);
Marc Zyngierabcee5f2011-09-08 09:06:10 +0100108 int (*cpu_disable)(unsigned int cpu);
109#endif
110#endif
111};
112
Stephen Boyd6c3ff8b2013-10-30 18:21:09 -0700113struct of_cpu_method {
114 const char *method;
Masahiro Yamadaf460b6a2015-08-26 07:49:12 +0100115 const struct smp_operations *ops;
Stephen Boyd6c3ff8b2013-10-30 18:21:09 -0700116};
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 }
Marc Zyngierabcee5f2011-09-08 09:06:10 +0100122/*
123 * set platform specific SMP operations
124 */
Masahiro Yamada4caa9dd2015-08-26 07:49:11 +0100125extern void smp_set_ops(const struct smp_operations *);
Marc Zyngierabcee5f2011-09-08 09:06:10 +0100126
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127#endif /* ifndef __ASM_ARM_SMP_H */