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
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
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
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
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