2 files changed, 17 insertions, 2 deletions
diff --git a/src/common/tusb_common.h b/src/common/tusb_common.h
index b1ee40a1a..270339cca 100644
--- a/src/common/tusb_common.h
+++ b/src/common/tusb_common.h
@@ -76,6 +76,21 @@
 #include "tusb_timeout.h" // TODO remove
 
 //--------------------------------------------------------------------+
+// Optional API implemented by application if needed
+// TODO move to a more ovious place/file
+//--------------------------------------------------------------------+
+
+// flush data cache
+TU_ATTR_WEAK extern void tusb_app_dcache_flush(uintptr_t addr, uint32_t data_size);
+
+// invalidate data cache
+TU_ATTR_WEAK extern void tusb_app_dcache_invalidate(uintptr_t addr, uint32_t data_size);
+
+// Optional physical <-> virtual address translation
+TU_ATTR_WEAK extern void* tusb_app_virt_to_phys(void *virt_addr);
+TU_ATTR_WEAK extern void* tusb_app_phys_to_virt(void *phys_addr);
+
+//--------------------------------------------------------------------+
 // Internal Inline Functions
 //--------------------------------------------------------------------+
 
diff --git a/src/common/tusb_mcu.h b/src/common/tusb_mcu.h
index a599c4fe9..e7d4e2c32 100644
--- a/src/common/tusb_mcu.h
+++ b/src/common/tusb_mcu.h
@@ -28,8 +28,8 @@
 #define TUSB_MCU_H_
 
 //--------------------------------------------------------------------+
-// Port Specific
-// TUP stand for TinyUSB Port (can be renamed)
+// Port/Platform Specific
+// TUP stand for TinyUSB Port/Platform (can be renamed)
 //--------------------------------------------------------------------+
 
 //------------- Unaligned Memory Access -------------//