Subversion Repositories HelenOS

/*

 * Copyright (C) 2006 Jakub Jermar

 * 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.

 */

/*

 * This is the generic page hash table interface.

 */

#ifdef CONFIG_PAGE_HT

#ifndef __PAGE_HT_H__

#define __PAGE_HT_H__

#include <mm/page.h>

#include <typedefs.h>

#include <arch/types.h>

#include <adt/list.h>

#include <adt/hash_table.h>

#define PAGE_HT_KEYS    2

#define KEY_AS      0

#define KEY_PAGE    1

#define PAGE_HT_ENTRIES_BITS    13

#define PAGE_HT_ENTRIES     (1<<PAGE_HT_ENTRIES_BITS)

#define PTE_VALID(pte)      ((pte) != NULL)

#define PTE_PRESENT(pte)    ((pte)->p != 0)

#define PTE_GET_FRAME(pte)  ((pte)->frame)

#define PTE_READABLE(pte)   1

#define PTE_WRITABLE(pte)   ((pte)->w != 0)

#define PTE_EXECUTABLE(pte) ((pte)->x != 0)

#define SET_PTL0_ADDRESS(x)

struct pte {

    link_t link;        /**< Page hash table link. */

    as_t *as;       /**< Address space. */

    __address page;     /**< Virtual memory page. */

    __address frame;    /**< Physical memory frame. */

    unsigned g : 1;     /**< Global page. */

    unsigned x : 1;     /**< Execute. */

    unsigned w : 1;     /**< Writable. */

    unsigned k : 1;     /**< Kernel privileges required. */

    unsigned c : 1;     /**< Cacheable. */

    unsigned a : 1;     /**< Accessed. */

    unsigned d : 1;     /**< Dirty. */

    unsigned p : 1;     /**< Present. */

};

extern page_mapping_operations_t ht_mapping_operations;

extern mutex_t page_ht_lock;

extern hash_table_t page_ht;

extern hash_table_operations_t ht_operations;

#endif

#endif