119 lines
2.8 KiB
C
119 lines
2.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* arch/arm/include/asm/smp.h
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*
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* Copyright (C) 2004-2005 ARM Ltd.
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*/
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#ifndef __ASM_ARM_SMP_H
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#define __ASM_ARM_SMP_H
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#include <linux/threads.h>
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#include <linux/cpumask.h>
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#include <linux/thread_info.h>
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#ifndef CONFIG_SMP
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# error "<asm/smp.h> included in non-SMP build"
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#endif
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#define raw_smp_processor_id() (current_thread_info()->cpu)
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struct seq_file;
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/*
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* generate IPI list text
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*/
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extern void show_ipi_list(struct seq_file *, int);
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/*
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* Called from C code, this handles an IPI.
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*/
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void handle_IPI(int ipinr, struct pt_regs *regs);
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/*
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* Setup the set of possible CPUs (via set_cpu_possible)
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*/
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extern void smp_init_cpus(void);
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/*
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* Register IPI interrupts with the arch SMP code
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*/
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extern void set_smp_ipi_range(int ipi_base, int nr_ipi);
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/*
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* Called from platform specific assembly code, this is the
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* secondary CPU entry point.
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*/
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asmlinkage void secondary_start_kernel(struct task_struct *task);
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/*
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* Initial data for bringing up a secondary CPU.
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*/
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struct secondary_data {
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union {
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struct mpu_rgn_info *mpu_rgn_info;
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u64 pgdir;
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};
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unsigned long swapper_pg_dir;
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void *stack;
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struct task_struct *task;
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};
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extern struct secondary_data secondary_data;
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extern void secondary_startup(void);
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extern void secondary_startup_arm(void);
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extern int __cpu_disable(void);
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extern void __cpu_die(unsigned int cpu);
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extern void arch_send_call_function_single_ipi(int cpu);
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extern void arch_send_call_function_ipi_mask(const struct cpumask *mask);
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extern void arch_send_wakeup_ipi_mask(const struct cpumask *mask);
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extern int register_ipi_completion(struct completion *completion, int cpu);
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struct smp_operations {
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#ifdef CONFIG_SMP
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/*
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* Setup the set of possible CPUs (via set_cpu_possible)
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*/
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void (*smp_init_cpus)(void);
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/*
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* Initialize cpu_possible map, and enable coherency
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*/
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void (*smp_prepare_cpus)(unsigned int max_cpus);
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/*
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* Perform platform specific initialisation of the specified CPU.
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*/
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void (*smp_secondary_init)(unsigned int cpu);
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/*
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* Boot a secondary CPU, and assign it the specified idle task.
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* This also gives us the initial stack to use for this CPU.
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*/
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int (*smp_boot_secondary)(unsigned int cpu, struct task_struct *idle);
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#ifdef CONFIG_HOTPLUG_CPU
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int (*cpu_kill)(unsigned int cpu);
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void (*cpu_die)(unsigned int cpu);
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bool (*cpu_can_disable)(unsigned int cpu);
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int (*cpu_disable)(unsigned int cpu);
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#endif
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#endif
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};
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struct of_cpu_method {
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const char *method;
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const struct smp_operations *ops;
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};
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#define CPU_METHOD_OF_DECLARE(name, _method, _ops) \
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static const struct of_cpu_method __cpu_method_of_table_##name \
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__used __section("__cpu_method_of_table") \
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= { .method = _method, .ops = _ops }
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/*
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* set platform specific SMP operations
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*/
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extern void smp_set_ops(const struct smp_operations *);
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#endif /* ifndef __ASM_ARM_SMP_H */
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