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bcache.h
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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 
13 /* Some R4000 / R4400 / R4600 / R5000 machines may have a non-dma-coherent,
14  chipset implemented caches. On machines with other CPUs the CPU does the
15  cache thing itself. */
16 struct bcache_ops {
19  void (*bc_wback_inv)(unsigned long page, unsigned long size);
20  void (*bc_inv)(unsigned long page, unsigned long size);
21 };
22 
23 extern void indy_sc_init(void);
24 
25 #ifdef CONFIG_BOARD_SCACHE
26 
27 extern struct bcache_ops *bcops;
28 
29 static inline void bc_enable(void)
30 {
31  bcops->bc_enable();
32 }
33 
34 static inline void bc_disable(void)
35 {
36  bcops->bc_disable();
37 }
38 
39 static inline void bc_wback_inv(unsigned long page, unsigned long size)
40 {
41  bcops->bc_wback_inv(page, size);
42 }
43 
44 static inline void bc_inv(unsigned long page, unsigned long size)
45 {
46  bcops->bc_inv(page, size);
47 }
48 
49 #else /* !defined(CONFIG_BOARD_SCACHE) */
50 
51 /* Not R4000 / R4400 / R4600 / R5000. */
52 
53 #define bc_enable() do { } while (0)
54 #define bc_disable() do { } while (0)
55 #define bc_wback_inv(page, size) do { } while (0)
56 #define bc_inv(page, size) do { } while (0)
57 
58 #endif /* !defined(CONFIG_BOARD_SCACHE) */
59 
60 #endif /* _ASM_BCACHE_H */