diff -Naur xen-unstable-trp-sdp-pristine/extras/mini-os/arch/ia64/iorw.c xen-unstable-trp-sdp/extras/mini-os/arch/ia64/iorw.c
--- xen-unstable-trp-sdp-pristine/extras/mini-os/arch/ia64/iorw.c	1969-12-31 19:00:00.000000000 -0500
+++ xen-unstable-trp-sdp/extras/mini-os/arch/ia64/iorw.c	2011-02-23 19:40:48.000000000 -0500
@@ -0,0 +1,23 @@
+#include <mini-os/iorw.h>
+#include <mini-os/console.h>
+
+void iowrite8(void* addr, uint8_t val)
+{
+   printk("iorw not implemented!!\n");
+}
+void iowrite32(void* addr, uint32_t val)
+{
+   printk("iorw not implemented!!\n");
+}
+
+uint8_t ioread8(void* addr)
+{
+   printk("iorw not implemented!!\n");
+   return 0;
+}
+uint32_t ioread32(void* addr)
+{
+   printk("iorw not implemented!!\n");
+   return 0;
+}
+
diff -Naur xen-unstable-trp-sdp-pristine/extras/mini-os/arch/x86/iorw.c xen-unstable-trp-sdp/extras/mini-os/arch/x86/iorw.c
--- xen-unstable-trp-sdp-pristine/extras/mini-os/arch/x86/iorw.c	1969-12-31 19:00:00.000000000 -0500
+++ xen-unstable-trp-sdp/extras/mini-os/arch/x86/iorw.c	2011-02-23 19:40:48.000000000 -0500
@@ -0,0 +1,20 @@
+#include <mini-os/iorw.h>
+
+void iowrite8(void* addr, uint8_t val)
+{
+   *((uint8_t*)addr) = val;
+}
+void iowrite32(void* addr, uint32_t val)
+{
+   *((uint32_t*)addr) = val;
+}
+
+uint8_t ioread8(void* addr)
+{
+   return *((uint8_t*) addr);
+}
+uint32_t ioread32(void* addr)
+{
+   return *((uint32_t*) addr);
+}
+
diff -Naur xen-unstable-trp-sdp-pristine/extras/mini-os/include/iorw.h xen-unstable-trp-sdp/extras/mini-os/include/iorw.h
--- xen-unstable-trp-sdp-pristine/extras/mini-os/include/iorw.h	1969-12-31 19:00:00.000000000 -0500
+++ xen-unstable-trp-sdp/extras/mini-os/include/iorw.h	2011-02-23 19:40:48.000000000 -0500
@@ -0,0 +1,12 @@
+#ifndef MINIOS_IORW_H
+#define MINIOS_IORW_H
+
+#include <mini-os/types.h>
+
+void iowrite8(void* addr, uint8_t val);
+void iowrite32(void* addr, uint32_t val);
+
+uint8_t ioread8(void* addr);
+uint32_t ioread32(void* addr);
+
+#endif