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
12#include <linux/types.h>
13
14/* Some R4000 / R4400 / R4600 / R5000 machines may have a non-dma-coherent,
15   chipset implemented caches.	On machines with other CPUs the CPU does the
16   cache thing itself. */
17struct 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);
22	void (*bc_prefetch_enable)(void);
23	void (*bc_prefetch_disable)(void);
24	bool (*bc_prefetch_is_enabled)(void);
25};
26
27extern void indy_sc_init(void);
28
29#ifdef CONFIG_BOARD_SCACHE
30
31extern struct bcache_ops *bcops;
32
33static inline void bc_enable(void)
34{
35	bcops->bc_enable();
36}
37
38static inline void bc_disable(void)
39{
40	bcops->bc_disable();
41}
42
43static inline void bc_wback_inv(unsigned long page, unsigned long size)
44{
45	bcops->bc_wback_inv(page, size);
46}
47
48static inline void bc_inv(unsigned long page, unsigned long size)
49{
50	bcops->bc_inv(page, size);
51}
52
53static inline void bc_prefetch_enable(void)
54{
55	if (bcops->bc_prefetch_enable)
56		bcops->bc_prefetch_enable();
57}
58
59static inline void bc_prefetch_disable(void)
60{
61	if (bcops->bc_prefetch_disable)
62		bcops->bc_prefetch_disable();
63}
64
65static 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
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)
81#define bc_prefetch_enable() do { } while (0)
82#define bc_prefetch_disable() do { } while (0)
83#define bc_prefetch_is_enabled() 0
84
85#endif /* !defined(CONFIG_BOARD_SCACHE) */
86
87#endif /* _ASM_BCACHE_H */
88