1 files changed, 16 insertions, 0 deletions
diff --git a/src/device/dcd.h b/src/device/dcd.h
index 00419ff05..f82b8633d 100644
--- a/src/device/dcd.h
+++ b/src/device/dcd.h
@@ -103,6 +103,22 @@ typedef struct TU_ATTR_ALIGNED(4)
 //TU_VERIFY_STATIC(sizeof(dcd_event_t) <= 12, "size is not correct");
 
 //--------------------------------------------------------------------+
+// Memory API
+//--------------------------------------------------------------------+
+
+// clean/flush data cache: write cache -> memory.
+// Required before an DMA TX transfer to make sure data is in memory
+void dcd_dcache_clean(void* addr, uint32_t data_size) TU_ATTR_WEAK;
+
+// invalidate data cache: mark cache as invalid, next read will read from memory
+// Required BOTH before and after an DMA RX transfer
+void dcd_dcache_invalidate(void* addr, uint32_t data_size) TU_ATTR_WEAK;
+
+// clean and invalidate data cache
+// Required before an DMA transfer where memory is both read/write by DMA
+void dcd_dcache_clean_invalidate(void* addr, uint32_t data_size) TU_ATTR_WEAK;
+
+//--------------------------------------------------------------------+
 // Controller API
 //--------------------------------------------------------------------+