Add code to aid tracking down cache alignment issues. In case DEBUG is defined in the cache.c, this code will check alignment of each attempt to flush/invalidate data cache and print a warning if the alignment is incorrect. If DEBUG is not defined, this code is optimized out.
Signed-off-by: Marek Vasut marex@denx.de Cc: Dinh Nguyen dinguyen@opensource.altera.com Cc: Albert Aribaud albert.u.boot@aribaud.net Cc: Tom Rini trini@konsulko.com --- arch/arm/cpu/armv7/cache_v7.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+)
diff --git a/arch/arm/cpu/armv7/cache_v7.c b/arch/arm/cpu/armv7/cache_v7.c index e8ee875..84431bb 100644 --- a/arch/arm/cpu/armv7/cache_v7.c +++ b/arch/arm/cpu/armv7/cache_v7.c @@ -16,6 +16,23 @@ #define ARMV7_DCACHE_CLEAN_INVAL_RANGE 4
#ifndef CONFIG_SYS_DCACHE_OFF +static int check_cache_range(unsigned long start, unsigned long stop) +{ + int ok = 1; + + if (start & (CONFIG_SYS_CACHELINE_SIZE - 1)) + ok = 0; + + if (stop & (CONFIG_SYS_CACHELINE_SIZE - 1)) + ok = 0; + + if (!ok) + debug("CACHE: Misaligned operation at range [%08lx, %08lx]\n", + start, stop); + + return ok; +} + /* * Write the level and type you want to Cache Size Selection Register(CSSELR) * to get size details from Current Cache Size ID Register(CCSIDR) @@ -257,6 +274,8 @@ void flush_dcache_all(void) */ void invalidate_dcache_range(unsigned long start, unsigned long stop) { + check_cache_range(start, stop); + v7_dcache_maint_range(start, stop, ARMV7_DCACHE_INVAL_RANGE);
v7_outer_cache_inval_range(start, stop); @@ -269,6 +288,8 @@ void invalidate_dcache_range(unsigned long start, unsigned long stop) */ void flush_dcache_range(unsigned long start, unsigned long stop) { + check_cache_range(start, stop); + v7_dcache_maint_range(start, stop, ARMV7_DCACHE_CLEAN_INVAL_RANGE);
v7_outer_cache_flush_range(start, stop);