arch/sparc/include/asm/smp_32.h

Source file repositories/reference/linux-study-clean/arch/sparc/include/asm/smp_32.h

File Facts

System
Linux kernel
Corpus path
arch/sparc/include/asm/smp_32.h
Extension
.h
Size
3236 bytes
Lines
131
Domain
Architecture Layer
Bucket
arch/sparc
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 sparc32_ipi_ops {
	void (*cross_call)(void *func, cpumask_t mask, unsigned long arg1,
			   unsigned long arg2, unsigned long arg3,
			   unsigned long arg4);
	void (*resched)(int cpu);
	void (*single)(int cpu);
	void (*mask_one)(int cpu);
};
extern const struct sparc32_ipi_ops *sparc32_ipi_ops;

static inline void xc0(void *func)
{
	sparc32_ipi_ops->cross_call(func, *cpu_online_mask, 0, 0, 0, 0);
}

static inline void xc1(void *func, unsigned long arg1)
{
	sparc32_ipi_ops->cross_call(func, *cpu_online_mask, arg1, 0, 0, 0);
}
static inline void xc2(void *func, unsigned long arg1, unsigned long arg2)
{
	sparc32_ipi_ops->cross_call(func, *cpu_online_mask, arg1, arg2, 0, 0);
}

static inline void xc3(void *func, unsigned long arg1, unsigned long arg2,
		       unsigned long arg3)
{
	sparc32_ipi_ops->cross_call(func, *cpu_online_mask,
				    arg1, arg2, arg3, 0);
}

static inline void xc4(void *func, unsigned long arg1, unsigned long arg2,
		       unsigned long arg3, unsigned long arg4)
{
	sparc32_ipi_ops->cross_call(func, *cpu_online_mask,
				    arg1, arg2, arg3, arg4);
}

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

static inline int cpu_logical_map(int cpu)
{
	return cpu;
}

int hard_smp_processor_id(void);

#define raw_smp_processor_id()		(current_thread_info()->cpu)

void smp_setup_cpu_possible_map(void);

#endif /* !(__ASSEMBLER__) */

/* Sparc specific messages. */
#define MSG_CROSS_CALL         0x0005       /* run func on cpus */

/* Empirical PROM processor mailbox constants.  If the per-cpu mailbox
 * contains something other than one of these then the ipi is from
 * Linux's active_kernel_processor.  This facility exists so that
 * the boot monitor can capture all the other cpus when one catches
 * a watchdog reset or the user enters the monitor using L1-A keys.
 */
#define MBOX_STOPCPU          0xFB
#define MBOX_IDLECPU          0xFC
#define MBOX_IDLECPU2         0xFD
#define MBOX_STOPCPU2         0xFE

#else /* SMP */

#define hard_smp_processor_id()		0
#define smp_setup_cpu_possible_map() do { } while (0)

#endif /* !(SMP) */
#endif /* !(_SPARC_SMP_H) */

Annotation

Implementation Notes