1 /* 2 * linux/arch/m32r/mm/cache.c 3 * 4 * Copyright (C) 2002-2005 Hirokazu Takata, Hayato Fujiwara 5 */ 6 7 #include <asm/pgtable.h> 8 9 #undef MCCR 10 11 #if defined(CONFIG_CHIP_XNUX2) || defined(CONFIG_CHIP_M32700) \ 12 || defined(CONFIG_CHIP_VDEC2) || defined(CONFIG_CHIP_OPSP) 13 /* Cache Control Register */ 14 #define MCCR ((volatile unsigned long*)0xfffffffc) 15 #define MCCR_CC (1UL << 7) /* Cache mode modify bit */ 16 #define MCCR_IIV (1UL << 6) /* I-cache invalidate */ 17 #define MCCR_DIV (1UL << 5) /* D-cache invalidate */ 18 #define MCCR_DCB (1UL << 4) /* D-cache copy back */ 19 #define MCCR_ICM (1UL << 1) /* I-cache mode [0:off,1:on] */ 20 #define MCCR_DCM (1UL << 0) /* D-cache mode [0:off,1:on] */ 21 #define MCCR_ICACHE_INV (MCCR_CC|MCCR_IIV) 22 #define MCCR_DCACHE_CB (MCCR_CC|MCCR_DCB) 23 #define MCCR_DCACHE_CBINV (MCCR_CC|MCCR_DIV|MCCR_DCB) 24 #define CHECK_MCCR(mccr) (mccr = *MCCR) 25 #elif defined(CONFIG_CHIP_M32102) 26 #define MCCR ((volatile unsigned char*)0xfffffffe) 27 #define MCCR_IIV (1UL << 0) /* I-cache invalidate */ 28 #define MCCR_ICACHE_INV MCCR_IIV 29 #elif defined(CONFIG_CHIP_M32104) 30 #define MCCR ((volatile unsigned short*)0xfffffffe) 31 #define MCCR_IIV (1UL << 8) /* I-cache invalidate */ 32 #define MCCR_DIV (1UL << 9) /* D-cache invalidate */ 33 #define MCCR_DCB (1UL << 10) /* D-cache copy back */ 34 #define MCCR_ICM (1UL << 0) /* I-cache mode [0:off,1:on] */ 35 #define MCCR_DCM (1UL << 1) /* D-cache mode [0:off,1:on] */ 36 #define MCCR_ICACHE_INV MCCR_IIV 37 #define MCCR_DCACHE_CB MCCR_DCB 38 #define MCCR_DCACHE_CBINV (MCCR_DIV|MCCR_DCB) 39 #endif 40 41 #ifndef MCCR 42 #error Unknown cache type. 43 #endif 44 45 46 /* Copy back and invalidate D-cache and invalidate I-cache all */ _flush_cache_all(void)47void _flush_cache_all(void) 48 { 49 #if defined(CONFIG_CHIP_M32102) 50 unsigned char mccr; 51 *MCCR = MCCR_ICACHE_INV; 52 #elif defined(CONFIG_CHIP_M32104) 53 unsigned short mccr; 54 55 /* Copyback and invalidate D-cache */ 56 /* Invalidate I-cache */ 57 *MCCR |= (MCCR_ICACHE_INV | MCCR_DCACHE_CBINV); 58 #else 59 unsigned long mccr; 60 61 /* Copyback and invalidate D-cache */ 62 /* Invalidate I-cache */ 63 *MCCR = MCCR_ICACHE_INV | MCCR_DCACHE_CBINV; 64 #endif 65 while ((mccr = *MCCR) & MCCR_IIV); /* loop while invalidating... */ 66 } 67 68 /* Copy back D-cache and invalidate I-cache all */ _flush_cache_copyback_all(void)69void _flush_cache_copyback_all(void) 70 { 71 #if defined(CONFIG_CHIP_M32102) 72 unsigned char mccr; 73 *MCCR = MCCR_ICACHE_INV; 74 #elif defined(CONFIG_CHIP_M32104) 75 unsigned short mccr; 76 77 /* Copyback and invalidate D-cache */ 78 /* Invalidate I-cache */ 79 *MCCR |= (MCCR_ICACHE_INV | MCCR_DCACHE_CB); 80 #else 81 unsigned long mccr; 82 83 /* Copyback D-cache */ 84 /* Invalidate I-cache */ 85 *MCCR = MCCR_ICACHE_INV | MCCR_DCACHE_CB; 86 #endif 87 while ((mccr = *MCCR) & MCCR_IIV); /* loop while invalidating... */ 88 } 89