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164 | palkovsky | 1 | /* |
2 | * Copyright (C) 2005 Martin Decky |
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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 __amd64_PAGE_H__ |
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30 | #define __amd64_PAGE_H__ |
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31 | |||
194 | palkovsky | 32 | #ifndef __ASM__ |
33 | # include <mm/page.h> |
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34 | # include <arch/mm/frame.h> |
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35 | # include <arch/types.h> |
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36 | #endif |
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164 | palkovsky | 37 | |
38 | #define PAGE_SIZE FRAME_SIZE |
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39 | |||
194 | palkovsky | 40 | #ifndef __ASM__ |
289 | palkovsky | 41 | # define KA2PA(x) (((__address) (x)) - 0xffffffff80000000) |
42 | # define PA2KA(x) (((__address) (x)) + 0xffffffff80000000) |
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194 | palkovsky | 43 | #else |
289 | palkovsky | 44 | # define KA2PA(x) ((x) - 0xffffffff80000000) |
45 | # define PA2KA(x) ((x) + 0xffffffff80000000) |
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194 | palkovsky | 46 | #endif |
47 | |||
226 | palkovsky | 48 | #define PTL0_INDEX_ARCH(vaddr) (((vaddr)>>39)&0x1ff) |
49 | #define PTL1_INDEX_ARCH(vaddr) (((vaddr)>>30)&0x1ff) |
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50 | #define PTL2_INDEX_ARCH(vaddr) (((vaddr)>>21)&0x1ff) |
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51 | #define PTL3_INDEX_ARCH(vaddr) (((vaddr)>>12)&0x1ff) |
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164 | palkovsky | 52 | |
226 | palkovsky | 53 | #define GET_PTL0_ADDRESS_ARCH() ((pte_t *) read_cr3()) |
54 | #define GET_PTL1_ADDRESS_ARCH(ptl0, i) ((pte_t *) ((((__u64) ((pte_t *)(ptl0))[(i)].addr_12_31)<<12) | (((__u64) ((pte_t *)(ptl0))[(i)].addr_32_51)<<32 ))) |
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55 | #define GET_PTL2_ADDRESS_ARCH(ptl1, i) ((pte_t *) ((((__u64) ((pte_t *)(ptl1))[(i)].addr_12_31)<<12) | (((__u64) ((pte_t *)(ptl1))[(i)].addr_32_51)<<32 ))) |
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56 | #define GET_PTL3_ADDRESS_ARCH(ptl2, i) ((pte_t *) ((((__u64) ((pte_t *)(ptl2))[(i)].addr_12_31)<<12) | (((__u64) ((pte_t *)(ptl2))[(i)].addr_32_51)<<32 ))) |
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57 | #define GET_FRAME_ADDRESS_ARCH(ptl3, i) ((__address *) ((((__u64) ((pte_t *)(ptl3))[(i)].addr_12_31)<<12) | (((__u64) ((pte_t *)(ptl3))[(i)].addr_32_51)<<32 ))) |
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164 | palkovsky | 58 | |
226 | palkovsky | 59 | #define SET_PTL0_ADDRESS_ARCH(ptl0) (write_cr3((__address) (ptl0))) |
60 | #define SET_PTL1_ADDRESS_ARCH(ptl0, i, a) set_pt_addr((pte_t *)(ptl0), (index_t)(i), a) |
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61 | #define SET_PTL2_ADDRESS_ARCH(ptl1, i, a) set_pt_addr((pte_t *)(ptl1), (index_t)(i), a) |
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62 | #define SET_PTL3_ADDRESS_ARCH(ptl2, i, a) set_pt_addr((pte_t *)(ptl2), (index_t)(i), a) |
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63 | #define SET_FRAME_ADDRESS_ARCH(ptl3, i, a) set_pt_addr((pte_t *)(ptl3), (index_t)(i), a) |
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164 | palkovsky | 64 | |
226 | palkovsky | 65 | #define GET_PTL1_FLAGS_ARCH(ptl0, i) get_pt_flags((pte_t *)(ptl0), (index_t)(i)) |
66 | #define GET_PTL2_FLAGS_ARCH(ptl1, i) get_pt_flags((pte_t *)(ptl1), (index_t)(i)) |
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67 | #define GET_PTL3_FLAGS_ARCH(ptl2, i) get_pt_flags((pte_t *)(ptl2), (index_t)(i)) |
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68 | #define GET_FRAME_FLAGS_ARCH(ptl3, i) get_pt_flags((pte_t *)(ptl3), (index_t)(i)) |
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164 | palkovsky | 69 | |
226 | palkovsky | 70 | #define SET_PTL1_FLAGS_ARCH(ptl0, i, x) set_pt_flags((pte_t *)(ptl0), (index_t)(i), (x)) |
71 | #define SET_PTL2_FLAGS_ARCH(ptl1, i, x) set_pt_flags((pte_t *)(ptl1), (index_t)(i), (x)) |
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72 | #define SET_PTL3_FLAGS_ARCH(ptl2, i, x) set_pt_flags((pte_t *)(ptl2), (index_t)(i), (x)) |
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73 | #define SET_FRAME_FLAGS_ARCH(ptl3, i, x) set_pt_flags((pte_t *)(ptl3), (index_t)(i), (x)) |
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164 | palkovsky | 74 | |
226 | palkovsky | 75 | #ifndef __ASM__ |
164 | palkovsky | 76 | |
226 | palkovsky | 77 | typedef struct page_specifier pte_t; |
78 | |||
79 | struct page_specifier { |
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80 | unsigned present : 1; |
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81 | unsigned writeable : 1; |
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82 | unsigned uaccessible : 1; |
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83 | unsigned page_write_through : 1; |
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84 | unsigned page_cache_disable : 1; |
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85 | unsigned accessed : 1; |
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86 | unsigned dirty : 1; |
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87 | unsigned unused: 1; |
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88 | unsigned global : 1; |
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89 | unsigned avl : 3; |
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90 | unsigned addr_12_31 : 30; |
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91 | unsigned addr_32_51 : 21; |
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92 | unsigned no_execute : 1; |
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93 | } __attribute__ ((packed)); |
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94 | |||
95 | static inline int get_pt_flags(pte_t *pt, index_t i) |
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96 | { |
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97 | pte_t *p = &pt[i]; |
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98 | |||
99 | return ( |
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100 | (!p->page_cache_disable)<<PAGE_CACHEABLE_SHIFT | |
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101 | (!p->present)<<PAGE_PRESENT_SHIFT | |
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102 | p->uaccessible<<PAGE_USER_SHIFT | |
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103 | 1<<PAGE_READ_SHIFT | |
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104 | p->writeable<<PAGE_WRITE_SHIFT | |
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105 | (!p->no_execute)<<PAGE_EXEC_SHIFT |
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106 | ); |
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107 | } |
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108 | |||
109 | static inline void set_pt_addr(pte_t *pt, index_t i, __address a) |
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110 | { |
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111 | pte_t *p = &pt[i]; |
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112 | |||
113 | p->addr_12_31 = (a >> 12) & 0xfffff; |
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114 | p->addr_32_51 = a >> 32; |
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115 | } |
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116 | |||
117 | static inline void set_pt_flags(pte_t *pt, index_t i, int flags) |
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118 | { |
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119 | pte_t *p = &pt[i]; |
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120 | |||
121 | p->page_cache_disable = !(flags & PAGE_CACHEABLE); |
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122 | p->present = !(flags & PAGE_NOT_PRESENT); |
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123 | p->uaccessible = (flags & PAGE_USER) != 0; |
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124 | p->writeable = (flags & PAGE_WRITE) != 0; |
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125 | p->no_execute = (flags & PAGE_EXEC) == 0; |
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126 | } |
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127 | |||
164 | palkovsky | 128 | extern void page_arch_init(void); |
129 | |||
194 | palkovsky | 130 | #endif |
164 | palkovsky | 131 | |
132 | #endif |