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 /* for now: just dummy functions to satisfy the linker */ 25 26 #include <common.h> 27 28 void __flush_cache(unsigned long start, unsigned long size) 29 { 30 #if defined(CONFIG_ARM1136) 31 void arm1136_cache_flush(void); 32 33 arm1136_cache_flush(); 34 #endif 35 #ifdef CONFIG_ARM926EJS 36 /* test and clean, page 2-23 of arm926ejs manual */ 37 asm("0: mrc p15, 0, r15, c7, c10, 3\n\t" "bne 0b\n" : : : "memory"); 38 /* disable write buffer as well (page 2-22) */ 39 asm("mcr p15, 0, %0, c7, c10, 4" : : "r" (0)); 40 #endif 41 return; 42 } 43 void flush_cache(unsigned long start, unsigned long size) 44 __attribute__((weak, alias("__flush_cache"))); 45 46 /* 47 * Default implementation: 48 * do a range flush for the entire range 49 */ 50 void __flush_dcache_all(void) 51 { 52 flush_cache(0, ~0); 53 } 54 void flush_dcache_all(void) 55 __attribute__((weak, alias("__flush_dcache_all"))); 56 57 58 /* 59 * Default implementation of enable_caches() 60 * Real implementation should be in platform code 61 */ 62 void __enable_caches(void) 63 { 64 puts("WARNING: Caches not enabled\n"); 65 } 66 void enable_caches(void) 67 __attribute__((weak, alias("__enable_caches"))); 68