arc: significant cache rework
[1] Align cache management functions to those in Linux kernel. I.e.:
a) Use the same functions for all cache ops (D$ Inv/Flush)
b) Split cache ops in 3 sub-functions: "before", "lineloop" and
"after". That way we may re-use "before" and "after" functions for
region and full cache ops.
[2] Implement full-functional L2 (SLC) management. Before SLC was
simply disabled early on boot. It's also possible to enable or disable
L2 cache from config utility.
[3] Disable/enable corresponding caches early on boot. So if U-Boot is
configured to use caches they will be used at all times (this is useful
in partucular for speed-up of relocation).
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
diff --git a/arch/arc/lib/init_helpers.c b/arch/arc/lib/init_helpers.c
index 25690ee..dbc8d68 100644
--- a/arch/arc/lib/init_helpers.c
+++ b/arch/arc/lib/init_helpers.c
@@ -10,16 +10,8 @@
int init_cache_f_r(void)
{
-#ifndef CONFIG_SYS_ICACHE_OFF
- icache_enable();
- /* Make sure no stale entries persist from before we disabled cache */
- invalidate_icache_all();
-#endif
-
#ifndef CONFIG_SYS_DCACHE_OFF
- dcache_enable();
- /* Make sure no stale entries persist from before we disabled cache */
- invalidate_dcache_all();
+ flush_dcache_all();
#endif
return 0;
}