source: mainline/kernel/generic/include/mm/mm.h@ fc0de8c

/*
 * Copyright (c) 2007 Martin Decky
 * 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.
 */

/** @addtogroup kernel_generic_mm
 * @{
 */
/** @file
 */

#ifndef KERN_MM_H_
#define KERN_MM_H_

#define PAGE_CACHEABLE_SHIFT            0
#define PAGE_NOT_CACHEABLE_SHIFT        PAGE_CACHEABLE_SHIFT
#define PAGE_PRESENT_SHIFT              1
#define PAGE_NOT_PRESENT_SHIFT          PAGE_PRESENT_SHIFT
#define PAGE_USER_SHIFT                 2
#define PAGE_KERNEL_SHIFT               PAGE_USER_SHIFT
#define PAGE_READ_SHIFT                 3
#define PAGE_WRITE_SHIFT                4
#define PAGE_EXEC_SHIFT                 5
#define PAGE_GLOBAL_SHIFT               6

#define PAGE_NOT_CACHEABLE              (0 << PAGE_CACHEABLE_SHIFT)
#define PAGE_CACHEABLE                  (1 << PAGE_CACHEABLE_SHIFT)

#define PAGE_PRESENT                    (0 << PAGE_PRESENT_SHIFT)
#define PAGE_NOT_PRESENT                (1 << PAGE_PRESENT_SHIFT)

#define PAGE_USER                       (1 << PAGE_USER_SHIFT)
#define PAGE_KERNEL                     (0 << PAGE_USER_SHIFT)

#define PAGE_READ                       (1 << PAGE_READ_SHIFT)
#define PAGE_WRITE                      (1 << PAGE_WRITE_SHIFT)
#define PAGE_EXEC                       (1 << PAGE_EXEC_SHIFT)

#define PAGE_GLOBAL                     (1 << PAGE_GLOBAL_SHIFT)

#endif

/** @}
 */