| 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 |
|
|---|
| 29 | #ifndef __ia32_PAGE_H__
|
|---|
| 30 | #define __ia32_PAGE_H__
|
|---|
| 31 |
|
|---|
| 32 | #include <arch/types.h>
|
|---|
| 33 | #include <arch/mm/frame.h>
|
|---|
| 34 |
|
|---|
| 35 | #define PAGE_SIZE FRAME_SIZE
|
|---|
| 36 |
|
|---|
| 37 | #define KA2PA(x) ((x) - 0x80000000)
|
|---|
| 38 | #define PA2KA(x) ((x) + 0x80000000)
|
|---|
| 39 |
|
|---|
| 40 | /*
|
|---|
| 41 | * Implementation of generic 4-level page table interface.
|
|---|
| 42 | * IA-32 has 2-level page tables, so PTL1 and PTL2 are left out.
|
|---|
| 43 | */
|
|---|
| 44 | #define PTL0_INDEX_ARCH(vaddr) (((vaddr)>>22)&0x3ff)
|
|---|
| 45 | #define PTL1_INDEX_ARCH(vaddr) 0
|
|---|
| 46 | #define PTL2_INDEX_ARCH(vaddr) 0
|
|---|
| 47 | #define PTL3_INDEX_ARCH(vaddr) (((vaddr)>>12)&0x3ff)
|
|---|
| 48 |
|
|---|
| 49 | #define GET_PTL1_ADDRESS_ARCH(ptl0, i) ((pte_t *)((((pte_t *)(ptl0))[(i)].frame_address)<<12))
|
|---|
| 50 | #define GET_PTL2_ADDRESS_ARCH(ptl1, i) (ptl1)
|
|---|
| 51 | #define GET_PTL3_ADDRESS_ARCH(ptl2, i) (ptl2)
|
|---|
| 52 | #define GET_FRAME_ADDRESS_ARCH(ptl3, i) ((__address)((((pte_t *)(ptl3))[(i)].frame_address)<<12))
|
|---|
| 53 |
|
|---|
| 54 |
|
|---|
| 55 | struct page_specifier {
|
|---|
| 56 | unsigned present : 1;
|
|---|
| 57 | unsigned writeable : 1;
|
|---|
| 58 | unsigned uaccessible : 1;
|
|---|
| 59 | unsigned page_write_through : 1;
|
|---|
| 60 | unsigned page_cache_disable : 1;
|
|---|
| 61 | unsigned accessed : 1;
|
|---|
| 62 | unsigned dirty : 1;
|
|---|
| 63 | unsigned : 2;
|
|---|
| 64 | unsigned avl : 3;
|
|---|
| 65 | unsigned frame_address : 20;
|
|---|
| 66 | } __attribute__ ((packed));
|
|---|
| 67 |
|
|---|
| 68 | typedef struct page_specifier pte_t;
|
|---|
| 69 |
|
|---|
| 70 | extern void page_arch_init(void);
|
|---|
| 71 |
|
|---|
| 72 | #endif
|
|---|
