rk27xx - implement cache_commit_discard(). Cache is still not enabled in crt0.S

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@30167 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 16 insertions, 0 deletions

diff --git a/firmware/target/arm/rk27xx/system-rk27xx.c b/firmware/target/arm/rk27xx/system-rk27xx.c
index 724273b61a..1459770b94 100644
--- a/firmware/target/arm/rk27xx/system-rk27xx.c
+++ b/firmware/target/arm/rk27xx/system-rk27xx.c
@@ -163,3 +163,19 @@ void udelay(unsigned usecs)
     );
 }
 
+void cpucache_commit_discard(void)
+{
+    /* invalidate cache way 0 */
+    CACHEOP = 0x02;
+
+    /* wait for invalidate process to complete */
+    while (CACHEOP & 0x01);
+
+    /* invalidate cache way 1 */
+    CACHEOP = 0x80000002;
+
+    /* wait for invalidate process to complete */
+    while (CACHEOP & 0x01);   
+}
+
+void cpucache_invalidate(void) __attribute__((alias("cpucache_commit_discard")));