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| 1 | jermar | 1 | /* |
| 2 | * Copyright (C) 2001-2004 Jakub Jermar |
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| 3 | * All rights reserved. |
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| 4 | * |
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| 5 | * Redistribution and use in source and binary forms, with or without |
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| 6 | * modification, are permitted provided that the following conditions |
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| 7 | * are met: |
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| 8 | * |
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| 9 | * - Redistributions of source code must retain the above copyright |
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| 10 | * notice, this list of conditions and the following disclaimer. |
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| 11 | * - Redistributions in binary form must reproduce the above copyright |
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| 12 | * notice, this list of conditions and the following disclaimer in the |
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| 13 | * documentation and/or other materials provided with the distribution. |
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| 14 | * - The name of the author may not be used to endorse or promote products |
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| 15 | * derived from this software without specific prior written permission. |
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| 16 | * |
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 27 | */ |
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| 28 | |||
| 11 | jermar | 29 | #ifndef __ia32_PAGE_H__ |
| 30 | #define __ia32_PAGE_H__ |
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| 1 | jermar | 31 | |
| 32 | #include <arch/types.h> |
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| 33 | #include <arch/mm/frame.h> |
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| 34 | |||
| 35 | #define PAGE_SIZE FRAME_SIZE |
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| 36 | |||
| 105 | jermar | 37 | #define KA2PA(x) ((x) - 0x80000000) |
| 38 | #define PA2KA(x) ((x) + 0x80000000) |
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| 1 | jermar | 39 | |
| 119 | jermar | 40 | /* |
| 41 | * Implementation of generic 4-level page table interface. |
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| 42 | * IA-32 has 2-level page tables, so PTL1 and PTL2 are left out. |
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| 43 | */ |
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| 44 | #define PTL0_INDEX_ARCH(vaddr) (((vaddr)>>22)&0x3ff) |
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| 45 | #define PTL1_INDEX_ARCH(vaddr) 0 |
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| 46 | #define PTL2_INDEX_ARCH(vaddr) 0 |
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| 47 | #define PTL3_INDEX_ARCH(vaddr) (((vaddr)>>12)&0x3ff) |
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| 48 | |||
| 49 | #define GET_PTL1_ADDRESS_ARCH(ptl0, i) ((pte_t *)((((pte_t *)(ptl0))[(i)].frame_address)<<12)) |
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| 50 | #define GET_PTL2_ADDRESS_ARCH(ptl1, i) (ptl1) |
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| 51 | #define GET_PTL3_ADDRESS_ARCH(ptl2, i) (ptl2) |
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| 52 | #define GET_FRAME_ADDRESS_ARCH(ptl3, i) ((__address)((((pte_t *)(ptl3))[(i)].frame_address)<<12)) |
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| 53 | |||
| 54 | |||
| 1 | jermar | 55 | struct page_specifier { |
| 56 | unsigned present : 1; |
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| 57 | unsigned writeable : 1; |
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| 58 | unsigned uaccessible : 1; |
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| 59 | unsigned page_write_through : 1; |
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| 60 | unsigned page_cache_disable : 1; |
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| 61 | unsigned accessed : 1; |
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| 62 | unsigned dirty : 1; |
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| 63 | unsigned : 2; |
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| 64 | unsigned avl : 3; |
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| 65 | unsigned frame_address : 20; |
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| 66 | } __attribute__ ((packed)); |
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| 67 | |||
| 119 | jermar | 68 | typedef struct page_specifier pte_t; |
| 69 | |||
| 1 | jermar | 70 | extern void page_arch_init(void); |
| 71 | |||
| 72 | #endif |