arch/arm/include/asm/outercache.h

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

File Facts

System
Linux kernel
Corpus path
arch/arm/include/asm/outercache.h
Extension
.h
Size
3268 bytes
Lines
121
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 outer_cache_fns {
	void (*inv_range)(unsigned long, unsigned long);
	void (*clean_range)(unsigned long, unsigned long);
	void (*flush_range)(unsigned long, unsigned long);
	void (*flush_all)(void);
	void (*disable)(void);
#ifdef CONFIG_OUTER_CACHE_SYNC
	void (*sync)(void);
#endif
	void (*resume)(void);

	/* This is an ARM L2C thing */
	void (*write_sec)(unsigned long, unsigned);
	void (*configure)(const struct l2x0_regs *);
};

extern struct outer_cache_fns outer_cache;

#ifdef CONFIG_OUTER_CACHE
/**
 * outer_inv_range - invalidate range of outer cache lines
 * @start: starting physical address, inclusive
 * @end: end physical address, exclusive
 */
static inline void outer_inv_range(phys_addr_t start, phys_addr_t end)
{
	if (outer_cache.inv_range)
		outer_cache.inv_range(start, end);
}

/**
 * outer_clean_range - clean dirty outer cache lines
 * @start: starting physical address, inclusive
 * @end: end physical address, exclusive
 */
static inline void outer_clean_range(phys_addr_t start, phys_addr_t end)
{
	if (outer_cache.clean_range)
		outer_cache.clean_range(start, end);
}

/**
 * outer_flush_range - clean and invalidate outer cache lines
 * @start: starting physical address, inclusive
 * @end: end physical address, exclusive
 */
static inline void outer_flush_range(phys_addr_t start, phys_addr_t end)
{
	if (outer_cache.flush_range)
		outer_cache.flush_range(start, end);
}

/**
 * outer_flush_all - clean and invalidate all cache lines in the outer cache
 *
 * Note: depending on implementation, this may not be atomic - it must
 * only be called with interrupts disabled and no other active outer
 * cache masters.
 *
 * It is intended that this function is only used by implementations
 * needing to override the outer_cache.disable() method due to security.
 * (Some implementations perform this as a clean followed by an invalidate.)
 */
static inline void outer_flush_all(void)
{
	if (outer_cache.flush_all)
		outer_cache.flush_all();
}

/**
 * outer_disable - clean, invalidate and disable the outer cache
 *
 * Disable the outer cache, ensuring that any data contained in the outer
 * cache is pushed out to lower levels of system memory.  The note and
 * conditions above concerning outer_flush_all() applies here.
 */
extern void outer_disable(void);

/**
 * outer_resume - restore the cache configuration and re-enable outer cache
 *
 * Restore any configuration that the cache had when previously enabled,
 * and re-enable the outer cache.
 */
static inline void outer_resume(void)
{
	if (outer_cache.resume)
		outer_cache.resume();
}

Annotation

Implementation Notes