arch/mips/include/asm/bcache.h

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

File Facts

System
Linux kernel
Corpus path
arch/mips/include/asm/bcache.h
Extension
.h
Size
2086 bytes
Lines
88
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 bcache_ops {
	void (*bc_enable)(void);
	void (*bc_disable)(void);
	void (*bc_wback_inv)(unsigned long page, unsigned long size);
	void (*bc_inv)(unsigned long page, unsigned long size);
	void (*bc_prefetch_enable)(void);
	void (*bc_prefetch_disable)(void);
	bool (*bc_prefetch_is_enabled)(void);
};

extern void indy_sc_init(void);

#ifdef CONFIG_BOARD_SCACHE

extern struct bcache_ops *bcops;

static inline void bc_enable(void)
{
	bcops->bc_enable();
}

static inline void bc_disable(void)
{
	bcops->bc_disable();
}

static inline void bc_wback_inv(unsigned long page, unsigned long size)
{
	bcops->bc_wback_inv(page, size);
}

static inline void bc_inv(unsigned long page, unsigned long size)
{
	bcops->bc_inv(page, size);
}

static inline void bc_prefetch_enable(void)
{
	if (bcops->bc_prefetch_enable)
		bcops->bc_prefetch_enable();
}

static inline void bc_prefetch_disable(void)
{
	if (bcops->bc_prefetch_disable)
		bcops->bc_prefetch_disable();
}

static inline bool bc_prefetch_is_enabled(void)
{
	if (bcops->bc_prefetch_is_enabled)
		return bcops->bc_prefetch_is_enabled();

	return false;
}

#else /* !defined(CONFIG_BOARD_SCACHE) */

/* Not R4000 / R4400 / R4600 / R5000.  */

#define bc_enable() do { } while (0)
#define bc_disable() do { } while (0)
#define bc_wback_inv(page, size) do { } while (0)
#define bc_inv(page, size) do { } while (0)
#define bc_prefetch_enable() do { } while (0)
#define bc_prefetch_disable() do { } while (0)
#define bc_prefetch_is_enabled() 0

#endif /* !defined(CONFIG_BOARD_SCACHE) */

#endif /* _ASM_BCACHE_H */

Annotation

Implementation Notes