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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 | |
| 20 | struct seq_file; |
| 21 | |
| 22 | /* |
| 23 | * generate IPI list text |
| 24 | */ |
| 25 | extern void show_ipi_list(struct seq_file *, int); |
| 26 | |
| 27 | /* |
| 28 | * Called from C code, this handles an IPI. |
| 29 | */ |
| 30 | void handle_IPI(int ipinr, struct pt_regs *regs); |
| 31 | |
| 32 | /* |
| 33 | * Setup the set of possible CPUs (via set_cpu_possible) |
| 34 | */ |
| 35 | extern void smp_init_cpus(void); |
| 36 | |
| 37 | /* |
| 38 | * Register IPI interrupts with the arch SMP code |
| 39 | */ |
| 40 | extern 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 | */ |
| 46 | asmlinkage void secondary_start_kernel(struct task_struct *task); |
| 47 | |
| 48 | |
| 49 | /* |
| 50 | * Initial data for bringing up a secondary CPU. |
| 51 | */ |
| 52 | struct 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 | }; |
| 61 | extern struct secondary_data secondary_data; |
| 62 | extern void secondary_startup(void); |
| 63 | extern void secondary_startup_arm(void); |
| 64 | |
| 65 | extern int __cpu_disable(void); |
| 66 | |
| 67 | static inline void __cpu_die(unsigned int cpu) { } |
| 68 | |
| 69 | extern void arch_send_call_function_single_ipi(int cpu); |
| 70 | extern void arch_send_call_function_ipi_mask(const struct cpumask *mask); |
| 71 | extern void arch_send_wakeup_ipi_mask(const struct cpumask *mask); |
| 72 | |
| 73 | extern int register_ipi_completion(struct completion *completion, int cpu); |
| 74 | |
| 75 | struct 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 | |
| 104 | struct 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 | */ |
| 116 | extern void smp_set_ops(const struct smp_operations *); |
| 117 | |
| 118 | #endif /* ifndef __ASM_ARM_SMP_H */ |
| 119 |
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