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