ohci: Add functions used for explicit cache operations

Author: ArcaneNibble

src/portable/ohci/ohci.c

@@ -143,6 +143,15 @@ enum {
   PID_FROM_TD = 0,
 };
 
+//--------------------------------------------------------------------+
+// Support for explicit D-cache operations
+//--------------------------------------------------------------------+
+TU_ATTR_WEAK bool hcd_dcache_clean(void const* addr, uint32_t data_size) { (void) addr; (void) data_size; return true; }
+TU_ATTR_WEAK bool hcd_dcache_invalidate(void const* addr, uint32_t data_size) { (void) addr; (void) data_size; return true; }
+#ifndef hcd_dcache_uncached
+#define hcd_dcache_uncached(x) (x)
+#endif
+
 //--------------------------------------------------------------------+
 // INTERNAL OBJECT & FUNCTION DECLARATION
 //--------------------------------------------------------------------+