mm_struct.h

/*
 * =====================================================================================
 *
 *       Filename:  mm64_struct.h
 *
 *    Description:  
 *
 *        Version:  1.0
 *        Created:  10.11.2011 10:31:04
 *       Revision:  none
 *       Compiler:  gcc
 *
 *         Author:  Georg Wassen (gw) (wassen@lfbs.rwth-aachen.de), 
 *        Company:  Lehrstuhl für Betriebssysteme (Chair for Operating Systems)
 *                  RWTH Aachen University
 *
 * Copyright (c) 2011, Georg Wassen, RWTH Aachen University
 * 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.
 *    * Neither the name of the University nor the names of its contributors
 *      may be used to endorse or promote products derived from this
 *      software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 REGENTS OR CONTRIBUTORS 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.
 *
 * =====================================================================================
 */

#ifndef MM_STRUCT_H
#define MM_STRUCT_H

#if __x86_64__

typedef union {
    uint64_t u64;
    /* structure for a reference to pd2/pdpe (bit 7, ps: must be 0), Intel 3A, Table 4-14 */
    struct {
        uint64_t p     :  1;    /* bit 0 - Present          - must be 1 to reference a pd2/pdpe */
        uint64_t rw    :  1;    /* bit 1 - Read/Write       - 0: read-only (depends on CPL and CR0l.WP) */
        uint64_t us    :  1;    /* bit 2 - User/Supervisor  - 0: no access for CPL=3 for 512 GB region */
        uint64_t pwt   :  1;    /* bit 3 - Page lvl Write-through  */
        uint64_t pcd   :  1;    /* bit 4 - Page lvl Cache Disable  */
        uint64_t a     :  1;    /* bit 5 - Accessed         - indicates if this entry has been used */
        uint64_t ign   :  1;    /* bit 6 - ignored */
        uint64_t ps    :  1;    /* bit 7 - Page Size        - must be 0 (i.e. reference to pd2/pdpe) */
        uint64_t ign2  :  1;    /* bit 8 - ignored */
        uint64_t avl1  :  3;    /* 9,10,11 - ignored        - AMD: available */
        uint64_t frame : 40;    /* bit 12..51 - Phys adr    - reference to 4kB aligned pd2/pdpe */
        uint64_t avl2  : 11;    /* bit 52..62 - ign.        - ignored/available */
        uint64_t nx    :  1;    /* bit 63 - eXecute Disable - if IA32_EFER.NXE=1 : 1: no execute from 512 GB region */
    } dir;
} pd1_entry_t;     /*  pd1 (page directory 1st level): pml4 */

typedef union {