1 files changed, 10 insertions, 2 deletions

diff --git a/firmware/target/arm/rk27xx/system-target.h b/firmware/target/arm/rk27xx/system-target.h
index 7fcf470ced..49f1a281cc 100644
--- a/firmware/target/arm/rk27xx/system-target.h
+++ b/firmware/target/arm/rk27xx/system-target.h
@@ -31,17 +31,25 @@ static inline void mdelay(unsigned msecs)
     udelay(1000 * msecs);
 }
 
-/* this needs more testing */
+/* Datasheet is very cryptic how to use this.
+ * With cache enabled it simpy hangs here
+ */
 static inline void core_sleep(void)
 {
     enable_irq();
-    SCU_CPUPD = 0xdeedbabe;
+    /* SCU_CPUPD = 0xdeedbabe; */
 }
 
 #define HAVE_CPUCACHE_COMMIT_DISCARD
 /* deprecated alias */
 #define HAVE_CPUCACHE_INVALIDATE
 
+/* Write DCache back to RAM for the given range and remove cache lines
+ * from DCache afterwards */
+void commit_discard_dcache_range(const void *base, unsigned int size);
+/* deprecated alias */
+void invalidate_dcache_range(const void *base, unsigned int size);
+
 #define CPUFREQ_NORMAL 200000000
 #define CPUFREQ_MAX    200000000