--- /dev/null
+/*
+ * This file is part of the Palacios Virtual Machine Monitor developed
+ * by the V3VEE Project with funding from the United States National
+ * Science Foundation and the Department of Energy.
+ *
+ * The V3VEE Project is a joint project between Northwestern University
+ * and the University of New Mexico. You can find out more at
+ * http://www.v3vee.org
+ *
+ * Copyright (c) 2008, Jack Lange <jarusl@cs.northwestern.edu>
+ * Copyright (c) 2008, The V3VEE Project <http://www.v3vee.org>
+ * All rights reserved.
+ *
+ * Author: Jack Lange <jarusl@cs.northwestern.edu>
+ *
+ * This is free software. You are permitted to use,
+ * redistribute, and modify it as specified in the file "V3VEE_LICENSE".
+ */
+
+#ifndef __VM_GUEST_MEM_H
+#define __VM_GUEST_MEM_H
+
+
+#ifdef __V3VEE__
+
+#include <palacios/vm_guest.h>
+#include <palacios/vmm_mem.h>
+
+
+/* These functions are ordered such that they can only call the functions defined in a lower order group */
+/* This is to avoid infinite lookup loops */
+
+/**********************************/
+/* GROUP 0 */
+/**********************************/
+
+/* Fundamental converters */
+// Call out to OS
+int host_va_to_host_pa(addr_t host_va, addr_t * host_pa);
+int host_pa_to_host_va(addr_t host_pa, addr_t * host_va);
+
+// guest_pa -> (shadow map) -> host_pa
+int guest_pa_to_host_pa(struct guest_info * guest_info, addr_t guest_pa, addr_t * host_pa);
+
+/* !! Currently not implemented !! */
+// host_pa -> (shadow_map) -> guest_pa
+int host_pa_to_guest_pa(struct guest_info * guest_info, addr_t host_pa, addr_t * guest_pa);
+
+
+/**********************************/
+/* GROUP 1 */
+/**********************************/
+
+
+/* !! Currently not implemented !! */
+// host_va -> host_pa -> guest_pa
+int host_va_to_guest_pa(struct guest_info * guest_info, addr_t host_va, addr_t * guest_pa);
+
+
+// guest_pa -> host_pa -> host_va
+int guest_pa_to_host_va(struct guest_info * guest_info, addr_t guest_pa, addr_t * host_va);
+
+
+// Look up the address in the guests page tables.. This can cause multiple calls that translate
+// ------------------------------------------------
+// | |
+// --> guest_pa -> host_pa -> host_va -> (read table) --> guest_pa
+int guest_va_to_guest_pa(struct guest_info * guest_info, addr_t guest_va, addr_t * guest_pa);
+
+
+
+/* !! Currently not implemented !! */
+// A page table walker in the guest's address space
+// ------------------------------------------------
+// | |
+// --> guest_pa -> host_pa -> host_va -> (read table) --> guest_va
+int guest_pa_to_guest_va(struct guest_info * guest_info, addr_t guest_pa, addr_t * guest_va);
+
+
+
+/**********************************/
+/* GROUP 2 */
+/**********************************/
+// guest_va -> guest_pa -> host_pa
+int guest_va_to_host_pa(struct guest_info * guest_info, addr_t guest_va, addr_t * host_pa);
+
+
+/* !! Currently not implemented !! */
+// host_pa -> guest_pa -> guest_va
+int host_pa_to_guest_va(struct guest_info * guest_info, addr_t host_pa, addr_t * guest_va);
+
+// guest_va -> guest_pa -> host_pa -> host_va
+int guest_va_to_host_va(struct guest_info * guest_info, addr_t guest_va, addr_t * host_va);
+
+
+/* !! Currently not implemented !! */
+// host_va -> host_pa -> guest_pa -> guest_va
+int host_va_to_guest_va(struct guest_info * guest_info, addr_t host_va, addr_t * guest_va);
+
+
+
+
+
+
+
+
+
+int read_guest_va_memory(struct guest_info * guest_info, addr_t guest_va, int count, uchar_t * dest);
+int read_guest_pa_memory(struct guest_info * guest_info, addr_t guest_pa, int count, uchar_t * dest);
+int write_guest_pa_memory(struct guest_info * guest_info, addr_t guest_pa, int count, uchar_t * src);
+// TODO int write_guest_va_memory(struct guest_info * guest_info, addr_t guest_va, int count, char * src);
+
+
+#endif // ! __V3VEE__
+
+
+#endif
