diff options
Diffstat (limited to 'arch/arm/lib/cache.c')
-rw-r--r-- | arch/arm/lib/cache.c | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/arch/arm/lib/cache.c b/arch/arm/lib/cache.c new file mode 100644 index 0000000..8b1c8ed --- /dev/null +++ b/arch/arm/lib/cache.c @@ -0,0 +1,67 @@ +/* + * (C) Copyright 2002 + * Wolfgang Denk, DENX Software Engineering, wd@denx.de. + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +/* for now: just dummy functions to satisfy the linker */ + +#include <common.h> + +void __flush_cache(unsigned long start, unsigned long size) +{ +#if defined(CONFIG_ARM1136) + void arm1136_cache_flush(void); + + arm1136_cache_flush(); +#endif +#ifdef CONFIG_ARM926EJS + /* test and clean, page 2-23 of arm926ejs manual */ + asm("0: mrc p15, 0, r15, c7, c10, 3\n\t" "bne 0b\n" : : : "memory"); + /* disable write buffer as well (page 2-22) */ + asm("mcr p15, 0, %0, c7, c10, 4" : : "r" (0)); +#endif + return; +} +void flush_cache(unsigned long start, unsigned long size) + __attribute__((weak, alias("__flush_cache"))); + +/* + * Default implementation: + * do a range flush for the entire range + */ +void __flush_dcache_all(void) +{ + flush_cache(0, ~0); +} +void flush_dcache_all(void) + __attribute__((weak, alias("__flush_dcache_all"))); + + +/* + * Default implementation of enable_caches() + * Real implementation should be in platform code + */ +void __enable_caches(void) +{ + puts("WARNING: Caches not enabled\n"); +} +void enable_caches(void) + __attribute__((weak, alias("__enable_caches"))); |