2 files changed, 20 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")));
diff --git a/firmware/target/arm/rk27xx/system-target.h b/firmware/target/arm/rk27xx/system-target.h
index fb904091b1..7fcf470ced 100644
--- a/firmware/target/arm/rk27xx/system-target.h
+++ b/firmware/target/arm/rk27xx/system-target.h
@@ -38,6 +38,10 @@ static inline void core_sleep(void)
     SCU_CPUPD = 0xdeedbabe;
 }
 
+#define HAVE_CPUCACHE_COMMIT_DISCARD
+/* deprecated alias */
+#define HAVE_CPUCACHE_INVALIDATE
+
 #define CPUFREQ_NORMAL 200000000
 #define CPUFREQ_MAX    200000000