source: mainline/kernel/generic/include/mm/page.h@ d0485c6

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since d0485c6 was d0485c6, checked in by Jakub Jermar <jakub@…>, 19 years ago

Introduce page colors. So far, only sparc64 uses correct page color bits. Other architectures have a dummy define
specifying zero bits for a page color.

There is a new check of page color in as_area_share(). Because of lack of support for this in the userspace, the
check has been #ifef'ed out.

  • Property mode set to 100644
File size: 3.6 KB
RevLine 
[f761f1eb]1/*
2 * Copyright (C) 2001-2004 Jakub Jermar
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * - Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * - Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * - The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
[06e1e95]29/** @addtogroup genericmm
[b45c443]30 * @{
31 */
32/** @file
33 */
34
[06e1e95]35#ifndef KERN_PAGE_H_
36#define KERN_PAGE_H_
[f761f1eb]37
[677a6d5]38#include <arch/mm/asid.h>
[f761f1eb]39#include <arch/types.h>
[74df77d]40#include <typedefs.h>
[6d9c49a]41#include <memstr.h>
[f761f1eb]42
[ff9f858]43#define PAGE_CACHEABLE_SHIFT 0
44#define PAGE_NOT_CACHEABLE_SHIFT PAGE_CACHEABLE_SHIFT
45#define PAGE_PRESENT_SHIFT 1
46#define PAGE_NOT_PRESENT_SHIFT PAGE_PRESENT_SHIFT
47#define PAGE_USER_SHIFT 2
48#define PAGE_KERNEL_SHIFT PAGE_USER_SHIFT
49#define PAGE_READ_SHIFT 3
50#define PAGE_WRITE_SHIFT 4
51#define PAGE_EXEC_SHIFT 5
[0c0410b]52#define PAGE_GLOBAL_SHIFT 6
[ff9f858]53
[76cec1e]54#define PAGE_NOT_CACHEABLE (0<<PAGE_CACHEABLE_SHIFT)
55#define PAGE_CACHEABLE (1<<PAGE_CACHEABLE_SHIFT)
[f761f1eb]56
[76cec1e]57#define PAGE_PRESENT (0<<PAGE_PRESENT_SHIFT)
58#define PAGE_NOT_PRESENT (1<<PAGE_PRESENT_SHIFT)
[f761f1eb]59
[76cec1e]60#define PAGE_USER (1<<PAGE_USER_SHIFT)
61#define PAGE_KERNEL (0<<PAGE_USER_SHIFT)
[f761f1eb]62
[ff9f858]63#define PAGE_READ (1<<PAGE_READ_SHIFT)
64#define PAGE_WRITE (1<<PAGE_WRITE_SHIFT)
65#define PAGE_EXEC (1<<PAGE_EXEC_SHIFT)
[f761f1eb]66
[0c0410b]67#define PAGE_GLOBAL (1<<PAGE_GLOBAL_SHIFT)
68
[d0485c6]69
70/**
71 * Macro for computing page color.
72 */
73#define PAGE_COLOR(va) (((va) >> PAGE_WIDTH) & ((1 << PAGE_COLOR_BITS) - 1))
74
[567807b1]75/** Page fault access type. */
76enum pf_access {
77 PF_ACCESS_READ,
78 PF_ACCESS_WRITE,
79 PF_ACCESS_EXEC
80};
81typedef enum pf_access pf_access_t;
82
[0c0410b]83/** Operations to manipulate page mappings. */
[f5935ed]84struct page_mapping_operations {
[7f1c620]85 void (* mapping_insert)(as_t *as, uintptr_t page, uintptr_t frame, int flags);
86 void (* mapping_remove)(as_t *as, uintptr_t page);
87 pte_t *(* mapping_find)(as_t *as, uintptr_t page);
[6d7ffa65]88};
[f5935ed]89typedef struct page_mapping_operations page_mapping_operations_t;
[992bbb97]90
[f5935ed]91extern page_mapping_operations_t *page_mapping_operations;
[992bbb97]92
[f761f1eb]93extern void page_init(void);
[2299914]94extern void page_table_lock(as_t *as, bool lock);
95extern void page_table_unlock(as_t *as, bool unlock);
[7f1c620]96extern void page_mapping_insert(as_t *as, uintptr_t page, uintptr_t frame, int flags);
97extern void page_mapping_remove(as_t *as, uintptr_t page);
98extern pte_t *page_mapping_find(as_t *as, uintptr_t page);
[ef67bab]99extern pte_t *page_table_create(int flags);
[482826d]100extern void page_table_destroy(pte_t *page_table);
[7f1c620]101extern void map_structure(uintptr_t s, size_t size);
102extern uintptr_t hw_map(uintptr_t physaddr, size_t size);
[f761f1eb]103
104#endif
[b45c443]105
[06e1e95]106/** @}
[b45c443]107 */
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