bcache.h
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/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (c) 1997, 1999 by Ralf Baechle
* Copyright (c) 1999 Silicon Graphics, Inc.
*/
#ifndef _ASM_BCACHE_H
#define _ASM_BCACHE_H
#include <linux/types.h>
/* Some R4000 / R4400 / R4600 / R5000 machines may have a non-dma-coherent,
chipset implemented caches. On machines with other CPUs the CPU does the
cache thing itself. */
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 */