This simple adds the cache flush for arm926. Most likely the same works for other families, like arm920t, but I didn't check as this is currently just an RFC.
Signed-off-by: Alessandro Rubini rubini@gnudd.com --- arch/arm/lib/cache.c | 6 ++++++ 1 files changed, 6 insertions(+), 0 deletions(-)
diff --git a/arch/arm/lib/cache.c b/arch/arm/lib/cache.c index 61ee9d3..b36fd24 100644 --- a/arch/arm/lib/cache.c +++ b/arch/arm/lib/cache.c @@ -32,5 +32,11 @@ void flush_cache (unsigned long dummy1, unsigned long dummy2)
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; }