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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 | |||
| 29 | #ifndef __PAGE_H__ |
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| 30 | #define __PAGE_H__ |
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| 31 | |||
| 32 | #include <arch/types.h> |
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| 33 | #include <arch/mm/page.h> |
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| 116 | jermar | 34 | #include <typedefs.h> |
| 1 | jermar | 35 | |
| 36 | #define PAGE_NOT_CACHEABLE (0<<0) |
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| 37 | #define PAGE_CACHEABLE (1<<0) |
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| 38 | |||
| 39 | #define PAGE_PRESENT (0<<1) |
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| 40 | #define PAGE_NOT_PRESENT (1<<1) |
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| 41 | |||
| 42 | #define PAGE_USER (1<<2) |
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| 43 | #define PAGE_KERNEL (0<<2) |
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| 44 | |||
| 45 | #define PAGE_READ (1<<3) |
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| 46 | #define PAGE_WRITE (1<<4) |
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| 47 | #define PAGE_EXEC (1<<5) |
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| 48 | |||
| 119 | jermar | 49 | /* |
| 50 | * This is the generic 4-level page table interface. |
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| 51 | * Architectures are supposed to implement *_ARCH macros. |
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| 52 | */ |
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| 53 | |||
| 54 | /* |
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| 55 | * These macros process vaddr and extract those portions |
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| 56 | * of it that function as indices to respective page tables. |
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| 57 | */ |
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| 58 | #define PTL0_INDEX(vaddr) PTL0_INDEX_ARCH(vaddr) |
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| 59 | #define PTL1_INDEX(vaddr) PTL1_INDEX_ARCH(vaddr) |
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| 60 | #define PTL2_INDEX(vaddr) PTL2_INDEX_ARCH(vaddr) |
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| 61 | #define PTL3_INDEX(vaddr) PTL3_INDEX_ARCH(vaddr) |
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| 62 | |||
| 63 | /* |
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| 64 | * These macros traverse the 4-level tree of page tables, |
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| 65 | * each descending by one level. |
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| 66 | */ |
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| 67 | #define GET_PTL1_ADDRESS(ptl0, i) GET_PTL1_ADDRESS_ARCH(ptl0, i) |
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| 68 | #define GET_PTL2_ADDRESS(ptl1, i) GET_PTL2_ADDRESS_ARCH(ptl1, i) |
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| 69 | #define GET_PTL3_ADDRESS(ptl2, i) GET_PTL3_ADDRESS_ARCH(ptl2, i) |
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| 70 | #define GET_FRAME_ADDRESS(ptl3, i) GET_FRAME_ADDRESS_ARCH(ptl3, i) |
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| 71 | |||
| 72 | /* |
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| 73 | * These macros are provided to change shape of the 4-level |
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| 74 | * tree of page tables on respective level. |
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| 75 | */ |
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| 76 | #define SET_PTL1_ADDRESS(ptl0, i, a) SET_PTL1_ADDRESS_ARCH(ptl0, i, a) |
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| 77 | #define SET_PTL2_ADDRESS(ptl1, i, a) SET_PTL2_ADDRESS_ARCH(ptl1, i, a) |
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| 78 | #define SET_PTL3_ADDRESS(ptl2, i, a) SET_PTL3_ADDRESS_ARCH(ptl2, i, a) |
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| 79 | #define SET_FRAME_ADDRESS(ptl3, i, a) SET_FRAME_ADDRESS_ARCH(ptl3, i, a) |
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| 80 | |||
| 81 | /* |
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| 82 | * These macros are provided to set/clear various flags within the page tables. |
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| 83 | */ |
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| 84 | #define SET_PTL1_FLAGS(ptl0, i, x) SET_PTL1_FLAGS_ARCH(ptl0, i, x) |
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| 85 | #define SET_PTL2_FLAGS(ptl1, i, x) SET_PTL2_FLAGS_ARCH(ptl1, i, x) |
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| 86 | #define SET_PTL3_FLAGS(ptl2, i, x) SET_PTL3_FLAGS_ARCH(ptl2, i, x) |
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| 87 | #define SET_FRAME_FLAGS(ptl3, i, x) SET_FRAME_FLAGS_ARCH(ptl3, i, x) |
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| 88 | |||
| 89 | |||
| 1 | jermar | 90 | extern void page_init(void); |
| 109 | jermar | 91 | extern void map_page_to_frame(__address page, __address frame, int flags, __address root); |
| 116 | jermar | 92 | extern void map_structure(__address s, size_t size); |
| 1 | jermar | 93 | |
| 94 | #endif |