--- /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 __VMM_SHADOW_PAGING_H__
+#define __VMM_SHADOW_PAGING_H__
+
+
+#ifdef __V3VEE__
+
+#include <palacios/vmm_util.h>
+#include <palacios/vmm_paging.h>
+#include <palacios/vmm_hashtable.h>
+
+
+struct shadow_page_state {
+
+ // these two reflect the top-level page directory
+ // of the guest page table
+ v3_reg_t guest_cr3; // points to guest's current page table
+
+ // Should this be here??
+ v3_reg_t guest_cr0;
+
+ // these two reflect the top-level page directory
+ // of the shadow page table
+ v3_reg_t shadow_cr3;
+
+
+ // Hash table that ties a CR3 value to a hash table pointer for the PT entries
+ struct hashtable * cr3_cache;
+ // Hash table that contains a mapping of guest pte addresses to host pte addresses
+ struct hashtable * cached_ptes;
+ addr_t cached_cr3;
+
+};
+
+
+
+struct guest_info;
+
+
+
+int v3_cache_page_tables32(struct guest_info * info, addr_t pde);
+
+int v3_init_shadow_page_state(struct guest_info * info);
+
+addr_t v3_create_new_shadow_pt32();
+
+int v3_handle_shadow_pagefault(struct guest_info * info, addr_t fault_addr, pf_error_t error_code);
+int v3_handle_shadow_invlpg(struct guest_info * info);
+
+
+
+
+int v3_replace_shdw_page(struct guest_info * info, addr_t location, void * new_page, void * old_page);
+int v3_replace_shdw_page32(struct guest_info * info, addr_t location, pte32_t * new_page, pte32_t * old_page);
+
+#endif // ! __V3VEE__
+
+#endif
