source: mainline/genarch/include/mm/page_ht.h@ 7c95658c

/*
 * 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