Index: abi/include/ddi/arg.h
===================================================================
--- abi/include/ddi/arg.h	(revision 26e7d6da331e8d35b5e83880a9740de5e9e4bd99)
+++ abi/include/ddi/arg.h	(revision 26e7d6da331e8d35b5e83880a9740de5e9e4bd99)
@@ -0,0 +1,62 @@
+/*
+ * Copyright (c) 2006 Jakub Jermar
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup genericddi
+ * @{
+ */
+/** @file
+ */
+
+#ifndef ABI_DDI_ARG_H_
+#define ABI_DDI_ARG_H_
+
+/** Structure encapsulating arguments for SYS_PHYSMEM_MAP syscall. */
+typedef struct {
+	/** ID of the destination task. */
+	uint64_t task_id;
+	/** Physical address of starting frame. */
+	void *phys_base;
+	/** Virtual address of starting page. */
+	void *virt_base;
+	/** Number of pages to map. */
+	size_t pages;
+	/** Address space area flags for the mapping. */
+	unsigned int flags;
+} ddi_memarg_t;
+
+/** Structure encapsulating arguments for SYS_ENABLE_IOSPACE syscall. */
+typedef struct {
+	uint64_t task_id;  /**< ID of the destination task. */
+	void *ioaddr;      /**< Starting I/O space address. */
+	size_t size;       /**< Number of bytes. */
+} ddi_ioarg_t;
+
+#endif
+
+/** @}
+ */