arch/arm/include/asm/smp.h

Source file repositories/reference/linux-study-clean/arch/arm/include/asm/smp.h

File Facts

System
Linux kernel
Corpus path
arch/arm/include/asm/smp.h
Extension
.h
Size
2896 bytes
Lines
119
Domain
Architecture Layer
Bucket
arch/arm
Inferred role
Architecture Layer: implementation source
Status
source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

struct secondary_data {
	union {
		struct mpu_rgn_info *mpu_rgn_info;
		u64 pgdir;
	};
	unsigned long swapper_pg_dir;
	void *stack;
	struct task_struct *task;
};
extern struct secondary_data secondary_data;
extern void secondary_startup(void);
extern void secondary_startup_arm(void);

extern int __cpu_disable(void);

static inline void __cpu_die(unsigned int cpu) { }

extern void arch_send_call_function_single_ipi(int cpu);
extern void arch_send_call_function_ipi_mask(const struct cpumask *mask);
extern void arch_send_wakeup_ipi_mask(const struct cpumask *mask);

extern int register_ipi_completion(struct completion *completion, int cpu);

struct smp_operations {
#ifdef CONFIG_SMP
	/*
	 * Setup the set of possible CPUs (via set_cpu_possible)
	 */
	void (*smp_init_cpus)(void);
	/*
	 * Initialize cpu_possible map, and enable coherency
	 */
	void (*smp_prepare_cpus)(unsigned int max_cpus);

	/*
	 * Perform platform specific initialisation of the specified CPU.
	 */
	void (*smp_secondary_init)(unsigned int cpu);
	/*
	 * Boot a secondary CPU, and assign it the specified idle task.
	 * This also gives us the initial stack to use for this CPU.
	 */
	int  (*smp_boot_secondary)(unsigned int cpu, struct task_struct *idle);
#ifdef CONFIG_HOTPLUG_CPU
	int  (*cpu_kill)(unsigned int cpu);
	void (*cpu_die)(unsigned int cpu);
	bool  (*cpu_can_disable)(unsigned int cpu);
	int  (*cpu_disable)(unsigned int cpu);
#endif
#endif
};

struct of_cpu_method {
	const char *method;
	const struct smp_operations *ops;
};

#define CPU_METHOD_OF_DECLARE(name, _method, _ops)			\
	static const struct of_cpu_method __cpu_method_of_table_##name	\
		__used __section("__cpu_method_of_table")		\
		= { .method = _method, .ops = _ops }
/*
 * set platform specific SMP operations
 */
extern void smp_set_ops(const struct smp_operations *);

#endif /* ifndef __ASM_ARM_SMP_H */

Annotation

Implementation Notes