[deliverable/linux.git] / arch / mips / include / asm / bcache.h

/*
 * 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 */
Commit	Line	Data
1da177e4 LT	1	/*
	2	* This file is subject to the terms and conditions of the GNU General Public
	3	* License. See the file "COPYING" in the main directory of this archive
	4	* for more details.
	5	*
	6	* Copyright (c) 1997, 1999 by Ralf Baechle
	7	* Copyright (c) 1999 Silicon Graphics, Inc.
	8	*/
	9	#ifndef _ASM_BCACHE_H
	10	#define _ASM_BCACHE_H
	11
37f2a174	12	#include <linux/types.h>
1da177e4 LT	13
1da177e4 LT	14	/* Some R4000 / R4400 / R4600 / R5000 machines may have a non-dma-coherent,
70342287	15	chipset implemented caches. On machines with other CPUs the CPU does the
1da177e4 LT	16	cache thing itself. */
	17	struct bcache_ops {
	18	void (*bc_enable)(void);
	19	void (*bc_disable)(void);
	20	void (*bc_wback_inv)(unsigned long page, unsigned long size);
	21	void (*bc_inv)(unsigned long page, unsigned long size);
37f2a174 PB	22	void (*bc_prefetch_enable)(void);
	23	void (*bc_prefetch_disable)(void);
	24	bool (*bc_prefetch_is_enabled)(void);
1da177e4 LT	25	};
	26
	27	extern void indy_sc_init(void);
1da177e4 LT	28
	29	#ifdef CONFIG_BOARD_SCACHE
	30
	31	extern struct bcache_ops *bcops;
	32
	33	static inline void bc_enable(void)
	34	{
	35	bcops->bc_enable();
	36	}
	37
	38	static inline void bc_disable(void)
	39	{
	40	bcops->bc_disable();
	41	}
	42
	43	static inline void bc_wback_inv(unsigned long page, unsigned long size)
	44	{
	45	bcops->bc_wback_inv(page, size);
	46	}
	47
	48	static inline void bc_inv(unsigned long page, unsigned long size)
	49	{
	50	bcops->bc_inv(page, size);
	51	}
	52
37f2a174 PB	53	static inline void bc_prefetch_enable(void)
	54	{
	55	if (bcops->bc_prefetch_enable)
	56	bcops->bc_prefetch_enable();
	57	}
	58
	59	static inline void bc_prefetch_disable(void)
	60	{
	61	if (bcops->bc_prefetch_disable)
	62	bcops->bc_prefetch_disable();
	63	}
	64
	65	static inline bool bc_prefetch_is_enabled(void)
	66	{
	67	if (bcops->bc_prefetch_is_enabled)
	68	return bcops->bc_prefetch_is_enabled();
	69
	70	return false;
	71	}
	72
1da177e4 LT	73	#else /* !defined(CONFIG_BOARD_SCACHE) */
	74
	75	/* Not R4000 / R4400 / R4600 / R5000. */
	76
	77	#define bc_enable() do { } while (0)
	78	#define bc_disable() do { } while (0)
	79	#define bc_wback_inv(page, size) do { } while (0)
	80	#define bc_inv(page, size) do { } while (0)
37f2a174 PB	81	#define bc_prefetch_enable() do { } while (0)
	82	#define bc_prefetch_disable() do { } while (0)
	83	#define bc_prefetch_is_enabled() 0
1da177e4 LT	84
	85	#endif /* !defined(CONFIG_BOARD_SCACHE) */
	86
	87	#endif /* _ASM_BCACHE_H */