The default cache operations defined in arch/arm/lib/cache.c do not perform any real cache operation, and instead a WARNING will be emitted.
Signed-off-by: Hong Xu hong.xu@atmel.com Tested-by: Elen Song elen.song@atmel.com CC: Albert Aribaud albert.u.boot@aribaud.net --- Since V1 Modified copyright line Used `debug' to replace `printf'
arch/arm/lib/cache.c | 58 +++++++++++++++++++++++++++---------------------- 1 files changed, 32 insertions(+), 26 deletions(-)
diff --git a/arch/arm/lib/cache.c b/arch/arm/lib/cache.c index 92b61a2..ce9b712 100644 --- a/arch/arm/lib/cache.c +++ b/arch/arm/lib/cache.c @@ -1,6 +1,5 @@ /* - * (C) Copyright 2002 - * Wolfgang Denk, DENX Software Engineering, wd@denx.de. + * (C) Copyright 2011 Atmel Corporation * * See file CREDITS for list of people who contributed to this * project. @@ -20,36 +19,43 @@ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, * MA 02111-1307 USA */ +#include <linux/compiler.h> +#include <common.h>
-/* for now: just dummy functions to satisfy the linker */ +#define EMIT_WARNING debug("WARNING: %s - CPU cache operation is not " \ +"implemented!\n", __func__)
-#include <common.h> +/* + * Default implementations + * + * Warn user if CPU code does not implement necessary cache functions + */ +void __weak flush_cache(unsigned long start, unsigned long size) +{ + EMIT_WARNING; +}
-void __flush_cache(unsigned long start, unsigned long size) +void __weak flush_dcache_all(void) { -#if defined(CONFIG_OMAP2420) || defined(CONFIG_ARM1136) - void arm1136_cache_flush(void); + EMIT_WARNING; +}
- 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 __weak flush_dcache_range(unsigned long start, unsigned long stop) +{ + EMIT_WARNING; } -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) +void __weak invalidate_dcache_range(unsigned long start, unsigned long stop) +{ + EMIT_WARNING; +} + +void __weak invalidate_dcache_all(void) +{ + EMIT_WARNING; +} + +void __weak invalidate_icache_all(void) { - flush_cache(0, ~0); + EMIT_WARNING; } -void flush_dcache_all(void) - __attribute__((weak, alias("__flush_dcache_all")));