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. */
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);
22 	void (*bc_prefetch_enable)(void);
23 	void (*bc_prefetch_disable)(void);
24 	bool (*bc_prefetch_is_enabled)(void);
25 };
26 
27 extern void indy_sc_init(void);
28 
29 #ifdef CONFIG_BOARD_SCACHE
30 
31 extern struct bcache_ops *bcops;
32 
bc_enable(void)33 static inline void bc_enable(void)
34 {
35 	bcops->bc_enable();
36 }
37 
bc_disable(void)38 static inline void bc_disable(void)
39 {
40 	bcops->bc_disable();
41 }
42 
bc_wback_inv(unsigned long page,unsigned long size)43 static inline void bc_wback_inv(unsigned long page, unsigned long size)
44 {
45 	bcops->bc_wback_inv(page, size);
46 }
47 
bc_inv(unsigned long page,unsigned long size)48 static inline void bc_inv(unsigned long page, unsigned long size)
49 {
50 	bcops->bc_inv(page, size);
51 }
52 
bc_prefetch_enable(void)53 static inline void bc_prefetch_enable(void)
54 {
55 	if (bcops->bc_prefetch_enable)
56 		bcops->bc_prefetch_enable();
57 }
58 
bc_prefetch_disable(void)59 static inline void bc_prefetch_disable(void)
60 {
61 	if (bcops->bc_prefetch_disable)
62 		bcops->bc_prefetch_disable();
63 }
64 
bc_prefetch_is_enabled(void)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 
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