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684 jermar 1
/*
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 * Copyright (C) 2006 Jakub Jermar
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * - Redistributions of source code must retain the above copyright
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 *   notice, this list of conditions and the following disclaimer.
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 * - Redistributions in binary form must reproduce the above copyright
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 *   notice, this list of conditions and the following disclaimer in the
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 *   documentation and/or other materials provided with the distribution.
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 * - The name of the author may not be used to endorse or promote products
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 *   derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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/*
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 * This is the generic page hash table interface.
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 */
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#ifdef CONFIG_PAGE_HT
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#ifndef __PAGE_HT_H__
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#define __PAGE_HT_H__
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#include <mm/page.h>
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#include <typedefs.h>
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#include <arch/types.h>
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#include <adt/list.h>
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#include <adt/hash_table.h>
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#define PAGE_HT_KEYS    2
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#define KEY_AS      0
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#define KEY_PAGE    1
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#define PAGE_HT_ENTRIES_BITS    13
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#define PAGE_HT_ENTRIES     (1<<PAGE_HT_ENTRIES_BITS)
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#define PTE_VALID(pte)      ((pte) != NULL)
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#define PTE_PRESENT(pte)    ((pte)->p != 0)
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#define PTE_GET_FRAME(pte)  ((pte)->frame)
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#define PTE_READABLE(pte)   1
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#define PTE_WRITABLE(pte)   ((pte)->w != 0)
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#define PTE_EXECUTABLE(pte) ((pte)->x != 0)
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#define SET_PTL0_ADDRESS(x)
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struct pte {
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    link_t link;        /**< Page hash table link. */
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    as_t *as;       /**< Address space. */
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    __address page;     /**< Virtual memory page. */
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    __address frame;    /**< Physical memory frame. */
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    unsigned g : 1;     /**< Global page. */
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    unsigned x : 1;     /**< Execute. */
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    unsigned w : 1;     /**< Writable. */
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    unsigned k : 1;     /**< Kernel privileges required. */
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    unsigned c : 1;     /**< Cacheable. */
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    unsigned a : 1;     /**< Accessed. */
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    unsigned d : 1;     /**< Dirty. */
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    unsigned p : 1;     /**< Present. */
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};
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extern page_mapping_operations_t ht_mapping_operations;
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extern mutex_t page_ht_lock;
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extern hash_table_t page_ht;
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extern hash_table_operations_t ht_operations;
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#endif
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#endif