arch/mips/include/asm/smp-ops.h

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

File Facts

System
Linux kernel
Corpus path
arch/mips/include/asm/smp-ops.h
Extension
.h
Size
2296 bytes
Lines
108
Domain
Architecture Layer
Bucket
arch/mips
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 plat_smp_ops {
	void (*send_ipi_single)(int cpu, unsigned int action);
	void (*send_ipi_mask)(const struct cpumask *mask, unsigned int action);
	void (*init_secondary)(void);
	void (*smp_finish)(void);
	int (*boot_secondary)(int cpu, struct task_struct *idle);
	void (*smp_setup)(void);
	void (*prepare_cpus)(unsigned int max_cpus);
	void (*prepare_boot_cpu)(void);
#ifdef CONFIG_HOTPLUG_CPU
	int (*cpu_disable)(void);
	void (*cpu_die)(unsigned int cpu);
	void (*cleanup_dead_cpu)(unsigned cpu);
#endif
#ifdef CONFIG_KEXEC_CORE
	void (*kexec_nonboot_cpu)(void);
#endif
};

extern void register_smp_ops(const struct plat_smp_ops *ops);

static inline void plat_smp_setup(void)
{
	extern const struct plat_smp_ops *mp_ops;	/* private */

	mp_ops->smp_setup();
}

extern void mips_smp_send_ipi_single(int cpu, unsigned int action);
extern void mips_smp_send_ipi_mask(const struct cpumask *mask,
				      unsigned int action);

#else /* !CONFIG_SMP */

struct plat_smp_ops;

static inline void plat_smp_setup(void)
{
	/* UP, nothing to do ...  */
}

static inline void register_smp_ops(const struct plat_smp_ops *ops)
{
}

#endif /* !CONFIG_SMP */

static inline int register_up_smp_ops(void)
{
#ifdef CONFIG_SMP_UP
	extern const struct plat_smp_ops up_smp_ops;

	register_smp_ops(&up_smp_ops);

	return 0;
#else
	return -ENODEV;
#endif
}

static inline int register_vsmp_smp_ops(void)
{
#ifdef CONFIG_MIPS_MT_SMP
	extern const struct plat_smp_ops vsmp_smp_ops;

	if (!cpu_has_mipsmt)
		return -ENODEV;

	register_smp_ops(&vsmp_smp_ops);

	return 0;
#else
	return -ENODEV;
#endif
}

#ifdef CONFIG_MIPS_CPS
extern int register_cps_smp_ops(void);
#else
static inline int register_cps_smp_ops(void)
{
	return -ENODEV;
}
#endif

#endif /* __ASM_SMP_OPS_H */

Annotation

Implementation Notes