Index: uspace/lib/libc/arch/sparc64/include/ddi.h
===================================================================
--- uspace/lib/libc/arch/sparc64/include/ddi.h	(revision 89b1b64f71aaaf3d8f3db35a293d36cb6056e718)
+++ uspace/lib/libc/arch/sparc64/include/ddi.h	(revision 89b1b64f71aaaf3d8f3db35a293d36cb6056e718)
@@ -0,0 +1,92 @@
+/*
+ * Copyright (c) 2009 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.
+ */
+
+/** @file
+ * @ingroup libsparc64
+ */
+
+#ifndef LIBC_sparc64_DDI_H_
+#define LIBC_sparc64_DDI_H_
+
+#include <sys/types.h>
+#include <libarch/types.h>
+
+static inline memory_barrier(void)
+{
+	asm volatile ("membar #LoadLoad | #StoreStore\n" ::: "memory");
+}
+
+static inline void pio_write_8(ioport8_t *port, uint8_t v)
+{
+	*port = v;
+	memory_barrier();
+}
+
+static inline void pio_write_16(ioport16_t *port, uint16_t v)
+{
+	*port = v;
+	memory_barrier();
+}
+
+static inline void pio_write_32(ioport32_t *port, uint32_t v)
+{
+	*port = v;
+	memory_barrier();
+}
+
+static inline uint8_t pio_read_8(ioport8_t *port)
+{
+	uint8_t rv;
+
+	rv = *port;
+	memory_barrier();
+
+	return rv;
+}
+
+static inline uint16_t pio_read_16(ioport16_t *port)
+{
+	uint16_t rv;
+
+	rv = *port;
+	memory_barrier();
+
+	return rv;
+}
+
+static inline uint32_t pio_read_32(ioport32_t *port)
+{
+	uint32_t rv;
+
+	rv = *port;
+	memory_barrier();
+
+	return rv;
+}
+
+#endif