Index: uspace/lib/c/include/ddi.h
===================================================================
--- uspace/lib/c/include/ddi.h	(revision b8b1adb1dbe8315a5defb4f8442681f374111952)
+++ uspace/lib/c/include/ddi.h	(revision c17469e42264d4df053bb02adb05c2a365e8e922)
@@ -40,4 +40,7 @@
 #include <sys/time.h>
 #include <abi/ddi/irq.h>
+#include <device/hw_res.h>
+#include <device/hw_res_parsed.h>
+#include <device/pio_window.h>
 #include <task.h>
 
@@ -55,4 +58,6 @@
 extern int dmamem_unmap_anonymous(void *);
 
+extern int pio_enable_range(addr_range_t *, void **);
+extern int pio_enable_resource(pio_window_t *, hw_resource_t *, void **);
 extern int pio_enable(void *, size_t, void **);
 
Index: uspace/lib/c/include/device/hw_res.h
===================================================================
--- uspace/lib/c/include/device/hw_res.h	(revision b8b1adb1dbe8315a5defb4f8442681f374111952)
+++ uspace/lib/c/include/device/hw_res.h	(revision c17469e42264d4df053bb02adb05c2a365e8e922)
@@ -76,12 +76,14 @@
 		struct {
 			uint64_t address;
+			size_t size;
+			bool relative;
 			endianness_t endianness;
-			size_t size;
 		} mem_range;
 		
 		struct {
 			uint64_t address;
+			size_t size;
+			bool relative;
 			endianness_t endianness;
-			size_t size;
 		} io_range;
 		
Index: uspace/lib/c/include/device/hw_res_parsed.h
===================================================================
--- uspace/lib/c/include/device/hw_res_parsed.h	(revision b8b1adb1dbe8315a5defb4f8442681f374111952)
+++ uspace/lib/c/include/device/hw_res_parsed.h	(revision c17469e42264d4df053bb02adb05c2a365e8e922)
@@ -37,4 +37,5 @@
 
 #include <device/hw_res.h>
+#include <device/pio_window.h>
 #include <str.h>
 
@@ -45,14 +46,28 @@
 #define HW_RES_KEEP_DUPLICIT   0x2
 
+
+#define RNGABS(rng)	(rng).address.absolute
+#define RNGREL(rng)	(rng).address.relative
+#define RNGSZ(rng)	(rng).size
+
+#define RNGABSPTR(rng)	((void *) ((uintptr_t) RNGABS((rng))))
+
+typedef struct address64 {
+	/** Aboslute address. */ 
+	uint64_t absolute;
+	/** PIO window base relative address. */
+	uint64_t relative; 
+} address64_t;
+
 /** Address range structure */
 typedef struct addr_range {
 	/** Start address */
-	uint64_t address;
-	
-	/** Endianness */
-	endianness_t endianness;
+	address64_t address;
 	
 	/** Area size */
 	size_t size;
+
+	/** Endianness */
+	endianness_t endianness;
 } addr_range_t;
 
@@ -139,5 +154,5 @@
 }
 
-extern int hw_res_list_parse(const hw_resource_list_t *,
+extern int hw_res_list_parse(const pio_window_t *, const hw_resource_list_t *,
     hw_res_list_parsed_t *, int);
 extern int hw_res_get_list_parsed(async_sess_t *, hw_res_list_parsed_t *, int);
Index: uspace/lib/c/include/stdio.h
===================================================================
--- uspace/lib/c/include/stdio.h	(revision b8b1adb1dbe8315a5defb4f8442681f374111952)
+++ uspace/lib/c/include/stdio.h	(revision c17469e42264d4df053bb02adb05c2a365e8e922)
@@ -124,4 +124,8 @@
 extern int vsnprintf(char *, size_t, const char *, va_list);
 
+extern int printf_size(const char *, ...)
+    PRINTF_ATTRIBUTE(1, 2);
+extern int vprintf_size(const char *, va_list);
+
 /* File stream functions */
 extern FILE *fopen(const char *, const char *);