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/*
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 * Copyright (C) 2001-2004 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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#ifndef __PAGE_H__
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#define __PAGE_H__
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#include <arch/mm/asid.h>
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#include <arch/types.h>
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#include <typedefs.h>
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#define PAGE_CACHEABLE_SHIFT        0
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#define PAGE_NOT_CACHEABLE_SHIFT    PAGE_CACHEABLE_SHIFT
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#define PAGE_PRESENT_SHIFT      1
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#define PAGE_NOT_PRESENT_SHIFT      PAGE_PRESENT_SHIFT
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#define PAGE_USER_SHIFT         2
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#define PAGE_KERNEL_SHIFT       PAGE_USER_SHIFT
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#define PAGE_READ_SHIFT         3
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#define PAGE_WRITE_SHIFT        4
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#define PAGE_EXEC_SHIFT         5
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#define PAGE_GLOBAL_SHIFT       6
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#define PAGE_NOT_CACHEABLE  (0<<PAGE_CACHEABLE_SHIFT)
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#define PAGE_CACHEABLE      (1<<PAGE_CACHEABLE_SHIFT)
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#define PAGE_PRESENT        (0<<PAGE_PRESENT_SHIFT)
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#define PAGE_NOT_PRESENT    (1<<PAGE_PRESENT_SHIFT)
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#define PAGE_USER       (1<<PAGE_USER_SHIFT)
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#define PAGE_KERNEL     (0<<PAGE_USER_SHIFT)
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#define PAGE_READ       (1<<PAGE_READ_SHIFT)
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#define PAGE_WRITE      (1<<PAGE_WRITE_SHIFT)
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#define PAGE_EXEC       (1<<PAGE_EXEC_SHIFT)
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#define PAGE_GLOBAL     (1<<PAGE_GLOBAL_SHIFT)
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/** Operations to manipulate page mappings. */
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struct page_mapping_operations {
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    void (* mapping_insert)(as_t *as, __address page, __address frame, int flags);
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    pte_t *(* mapping_find)(as_t *as, __address page);
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};
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typedef struct page_mapping_operations page_mapping_operations_t;
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extern page_mapping_operations_t *page_mapping_operations;
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extern void page_init(void);
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extern void page_mapping_insert(as_t *as, __address page, __address frame, int flags);
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extern pte_t *page_mapping_find(as_t *as, __address page);
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extern pte_t *page_table_create(int flags);
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extern void map_structure(__address s, size_t size);
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#endif