1 /* 2 * (C) Copyright 2002 3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. 4 * 5 * See file CREDITS for list of people who contributed to this 6 * project. 7 * 8 * This program is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU General Public License as 10 * published by the Free Software Foundation; either version 2 of 11 * the License, or (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 21 * MA 02111-1307 USA 22 */ 23 24 #include <common.h> 25 #include <asm/immap.h> 26 #include <asm/cache.h> 27 28 volatile int *cf_icache_status = (int *)ICACHE_STATUS; 29 volatile int *cf_dcache_status = (int *)DCACHE_STATUS; 30 31 void flush_cache(ulong start_addr, ulong size) 32 { 33 /* Must be implemented for all M68k processors with copy-back data cache */ 34 } 35 36 int icache_status(void) 37 { 38 return *cf_icache_status; 39 } 40 41 int dcache_status(void) 42 { 43 return *cf_dcache_status; 44 } 45 46 void icache_enable(void) 47 { 48 icache_invalid(); 49 50 *cf_icache_status = 1; 51 52 #ifdef CONFIG_CF_V4 53 __asm__ __volatile__("movec %0, %%acr2"::"r"(CONFIG_SYS_CACHE_ACR2)); 54 __asm__ __volatile__("movec %0, %%acr3"::"r"(CONFIG_SYS_CACHE_ACR3)); 55 #elif defined(CONFIG_CF_V4e) 56 __asm__ __volatile__("movec %0, %%acr6"::"r"(CONFIG_SYS_CACHE_ACR6)); 57 __asm__ __volatile__("movec %0, %%acr7"::"r"(CONFIG_SYS_CACHE_ACR7)); 58 #else 59 __asm__ __volatile__("movec %0, %%acr0"::"r"(CONFIG_SYS_CACHE_ACR0)); 60 __asm__ __volatile__("movec %0, %%acr1"::"r"(CONFIG_SYS_CACHE_ACR1)); 61 #endif 62 63 __asm__ __volatile__("movec %0, %%cacr"::"r"(CONFIG_SYS_CACHE_ICACR)); 64 } 65 66 void icache_disable(void) 67 { 68 u32 temp = 0; 69 70 *cf_icache_status = 0; 71 icache_invalid(); 72 73 #ifdef CONFIG_CF_V4 74 __asm__ __volatile__("movec %0, %%acr2"::"r"(temp)); 75 __asm__ __volatile__("movec %0, %%acr3"::"r"(temp)); 76 #elif defined(CONFIG_CF_V4e) 77 __asm__ __volatile__("movec %0, %%acr6"::"r"(temp)); 78 __asm__ __volatile__("movec %0, %%acr7"::"r"(temp)); 79 #else 80 __asm__ __volatile__("movec %0, %%acr0"::"r"(temp)); 81 __asm__ __volatile__("movec %0, %%acr1"::"r"(temp)); 82 83 #endif 84 } 85 86 void icache_invalid(void) 87 { 88 u32 temp; 89 90 temp = CONFIG_SYS_ICACHE_INV; 91 if (*cf_icache_status) 92 temp |= CONFIG_SYS_CACHE_ICACR; 93 94 __asm__ __volatile__("movec %0, %%cacr"::"r"(temp)); 95 } 96 97 /* 98 * data cache only for ColdFire V4 such as MCF547x_8x, MCF5445x 99 * the dcache will be dummy in ColdFire V2 and V3 100 */ 101 void dcache_enable(void) 102 { 103 dcache_invalid(); 104 *cf_dcache_status = 1; 105 106 #ifdef CONFIG_CF_V4 107 __asm__ __volatile__("movec %0, %%acr0"::"r"(CONFIG_SYS_CACHE_ACR0)); 108 __asm__ __volatile__("movec %0, %%acr1"::"r"(CONFIG_SYS_CACHE_ACR1)); 109 #elif defined(CONFIG_CF_V4e) 110 __asm__ __volatile__("movec %0, %%acr4"::"r"(CONFIG_SYS_CACHE_ACR4)); 111 __asm__ __volatile__("movec %0, %%acr5"::"r"(CONFIG_SYS_CACHE_ACR5)); 112 113 #endif 114 115 __asm__ __volatile__("movec %0, %%cacr"::"r"(CONFIG_SYS_CACHE_DCACR)); 116 } 117 118 void dcache_disable(void) 119 { 120 u32 temp = 0; 121 122 *cf_dcache_status = 0; 123 dcache_invalid(); 124 125 __asm__ __volatile__("movec %0, %%cacr"::"r"(temp)); 126 127 #ifdef CONFIG_CF_V4 128 __asm__ __volatile__("movec %0, %%acr0"::"r"(temp)); 129 __asm__ __volatile__("movec %0, %%acr1"::"r"(temp)); 130 #elif defined(CONFIG_CF_V4e) 131 __asm__ __volatile__("movec %0, %%acr4"::"r"(temp)); 132 __asm__ __volatile__("movec %0, %%acr5"::"r"(temp)); 133 134 #endif 135 } 136 137 void dcache_invalid(void) 138 { 139 #ifdef CONFIG_CF_V4 140 u32 temp; 141 142 temp = CONFIG_SYS_DCACHE_INV; 143 if (*cf_dcache_status) 144 temp |= CONFIG_SYS_CACHE_DCACR; 145 if (*cf_icache_status) 146 temp |= CONFIG_SYS_CACHE_ICACR; 147 148 __asm__ __volatile__("movec %0, %%cacr"::"r"(temp)); 149 #endif 150 } 151