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/*
 * 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 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