Rev 2147 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed
Rev | Author | Line No. | Line |
---|---|---|---|
2128 | jermar | 1 | /* |
2 | * Copyright (c) 2003-2007 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 | /** @addtogroup arm32mm |
||
30 | * @{ |
||
31 | */ |
||
32 | /** @file |
||
33 | */ |
||
34 | |||
35 | #ifndef KERN_arm32_PAGE_H_ |
||
36 | #define KERN_arm32_PAGE_H_ |
||
37 | |||
38 | #include <arch/mm/frame.h> |
||
39 | |||
40 | #define PAGE_WIDTH FRAME_WIDTH |
||
41 | #define PAGE_SIZE FRAME_SIZE |
||
42 | |||
43 | #define PAGE_COLOR_BITS 0 /* dummy */ |
||
44 | |||
45 | #ifndef __ASM__ |
||
46 | # define KA2PA(x) (((uintptr_t) (x)) - 0x80000000) |
||
47 | # define PA2KA(x) (((uintptr_t) (x)) + 0x80000000) |
||
48 | #else |
||
49 | # define KA2PA(x) ((x) - 0x80000000) |
||
50 | # define PA2KA(x) ((x) + 0x80000000) |
||
51 | #endif |
||
52 | |||
53 | #ifdef KERNEL |
||
2147 | jancik | 54 | // Using small pages <==> 4kb |
55 | #define PTL0_ENTRIES_ARCH (2<<12) // 4096 |
||
56 | #define PTL1_ENTRIES_ARCH 0 |
||
57 | #define PTL2_ENTRIES_ARCH 0 |
||
58 | #define PTL3_ENTRIES_ARCH (2<<8) // 256 |
||
2128 | jermar | 59 | |
2147 | jancik | 60 | #define PTL0_INDEX_ARCH(vaddr) (((vaddr) >> 20) & 0xfff) |
61 | #define PTL1_INDEX_ARCH(vaddr) 0 |
||
62 | #define PTL2_INDEX_ARCH(vaddr) 0 |
||
63 | #define PTL3_INDEX_ARCH(vaddr) (((vaddr) >> 12) & 0x0ff) |
||
2128 | jermar | 64 | |
65 | |||
2149 | jancik | 66 | #define GET_PTL1_ADDRESS_ARCH(ptl0, i) ((pte_t *)( (((pte_level0_t*)(ptl0))[(i)]).coarse_table_addr << 10 )) |
2147 | jancik | 67 | #define GET_PTL2_ADDRESS_ARCH(ptl1, i) (ptl1) |
68 | #define GET_PTL3_ADDRESS_ARCH(ptl2, i) (ptl2) |
||
2149 | jancik | 69 | #define GET_FRAME_ADDRESS_ARCH(ptl3, i) ( (uintptr_t)(((pte_level1_t*)(ptl3))[(i)]).frame_base_addr << 12 )) |
2128 | jermar | 70 | |
2147 | jancik | 71 | #define SET_PTL0_ADDRESS_ARCH(ptl0) // TODO |
72 | #define SET_PTL1_ADDRESS_ARCH(ptl0, i, a) (((pte_level0_t *)(ptl0))[(i)].coarse_table_addr = (a)>>10) |
||
73 | #define SET_PTL2_ADDRESS_ARCH(ptl1, i, a) |
||
74 | #define SET_PTL3_ADDRESS_ARCH(ptl2, i, a) |
||
75 | #define SET_FRAME_ADDRESS_ARCH(ptl3, i, a) (((pte_level1_t *)(ptl3))[(i)].frame_base_addr = (a)>>12) |
||
2128 | jermar | 76 | |
2147 | jancik | 77 | #define GET_PTL1_FLAGS_ARCH(ptl0, i) get_pt_level0_flags((pte_level0_t *)(ptl0), (index_t)(i)) |
78 | #define GET_PTL2_FLAGS_ARCH(ptl1, i) PAGE_PRESENT |
||
79 | #define GET_PTL3_FLAGS_ARCH(ptl2, i) PAGE_PRESENT |
||
80 | #define GET_FRAME_FLAGS_ARCH(ptl3, i) get_pt_level1_flags((pte_level1_t *)(ptl3), (index_t)(i)) |
||
2128 | jermar | 81 | |
2147 | jancik | 82 | #define SET_PTL1_FLAGS_ARCH(ptl0, i, x) set_pt_level0_flags((pte_level0_t *)(ptl0), (index_t)(i), (x)) |
83 | #define SET_PTL2_FLAGS_ARCH(ptl1, i, x) |
||
84 | #define SET_PTL3_FLAGS_ARCH(ptl2, i, x) |
||
2149 | jancik | 85 | #define SET_FRAME_FLAGS_ARCH(ptl3, i, x) set_pt_level1_flags((pte_level1_t *)(ptl3), (index_t)(i), (x)) |
2128 | jermar | 86 | |
2147 | jancik | 87 | #define PTE_VALID_ARCH(pte) (*((uint32_t *) (pte)) != 0) |
88 | #define PTE_PRESENT_ARCH(pte) ( ((pte_level0_t *)(pte))->descriptor_type ) |
||
89 | #define PTE_GET_FRAME_ARCH(pte) ( ((pte_level1_t *)(pte))->frame_base_addr << FRAME_WIDTH) // pte should point into ptl3 |
||
90 | #define PTE_WRITABLE_ARCH(pte) ( ((pte_level1_t *)(pte))->access_permission_0 == pte_ap_user_rw_kernel_rw ) // pte should point into ptl3 |
||
91 | #define PTE_EXECUTABLE_ARCH(pte) 1 |
||
2128 | jermar | 92 | |
93 | #ifndef __ASM__ |
||
94 | |||
95 | #include <mm/mm.h> |
||
96 | #include <arch/exception.h> |
||
97 | |||
2147 | jancik | 98 | //TODO Comment: Page table structure as in other architectures |
99 | |||
100 | static inline int get_pt_level0_flags(pte_level0_t *pt, index_t i) |
||
2128 | jermar | 101 | { |
2147 | jancik | 102 | pte_level0_t *p = &pt[i]; |
103 | |||
104 | return ( |
||
2149 | jancik | 105 | ( p->descriptor_type != pte_descriptor_not_preset ) << PAGE_PRESENT_SHIFT | |
2147 | jancik | 106 | ( 1 << PAGE_READ_SHIFT ) | |
107 | ( 1 << PAGE_EXEC_SHIFT ) | |
||
108 | ( 1 << PAGE_CACHEABLE ) |
||
109 | // Alf Note: MayBe return WriteAble because level0 should use only kernel which can write |
||
110 | // Alf Note: MayBe return global flag if index i > 2048 (horni 2GB because kernel is mapped globaly) |
||
111 | ); |
||
112 | |||
2128 | jermar | 113 | } |
2149 | jancik | 114 | static inline int get_pt_level1_flags(pte_level1_t *pt, index_t i) |
2147 | jancik | 115 | { |
116 | pte_level1_t *p = &pt[i]; |
||
2128 | jermar | 117 | |
2147 | jancik | 118 | return ( |
2149 | jancik | 119 | ( p->descriptor_type != pte_descriptor_not_preset ) << PAGE_PRESENT_SHIFT | |
2147 | jancik | 120 | ( (p->access_permission_0 == pte_ap_user_ro_kernel_rw) << PAGE_READ_SHIFT ) | |
121 | ( (p->access_permission_0 == pte_ap_user_rw_kernel_rw) << PAGE_READ_SHIFT ) | |
||
122 | ( (p->access_permission_0 == pte_ap_user_rw_kernel_rw) << PAGE_WRITE_SHIFT ) | |
||
123 | ( (p->access_permission_0 != pte_ap_user_no_kernel_rw) << PAGE_USER_SHIFT ) | |
||
124 | ( 1 << PAGE_EXEC_SHIFT ) | |
||
125 | ( p->bufferable << PAGE_CACHEABLE ) |
||
126 | // Alf Note: MayBe return global flag if index i > 2048 (horni 2GB because kernel is mapped globaly) |
||
127 | |||
128 | |||
129 | ); |
||
130 | |||
131 | } |
||
132 | |||
133 | |||
134 | static inline void set_pt_level0_flags(pte_level0_t *pt, index_t i, int flags) |
||
2128 | jermar | 135 | { |
2147 | jancik | 136 | pte_level0_t *p = &pt[i]; |
137 | |||
138 | if ( flags & PAGE_NOT_PRESENT ) { |
||
2149 | jancik | 139 | p->descriptor_type = pte_descriptor_not_preset; |
2147 | jancik | 140 | p->should_be_zero = 1; |
141 | } else |
||
142 | { |
||
2149 | jancik | 143 | p->descriptor_type = pte_descriptor_coarse_table; |
2147 | jancik | 144 | p->should_be_zero = 0; |
145 | } |
||
2128 | jermar | 146 | return; |
147 | } |
||
148 | |||
2147 | jancik | 149 | /* We use same acess rights for whole page, so if page is set as not preset then |
150 | * in acess_rigts_3 set value 1 |
||
151 | */ |
||
152 | static inline void set_pt_level1_flags(pte_level1_t *pt, index_t i, int flags) |
||
153 | { |
||
154 | pte_level1_t *p = &pt[i]; |
||
155 | |||
156 | if ( flags & PAGE_NOT_PRESENT ) { |
||
2149 | jancik | 157 | p->descriptor_type = pte_descriptor_not_preset; |
2147 | jancik | 158 | p->access_permission_3 = 1; // Ensure not all bits set to zero ... correct acess rights are stored in other 0-2 access permission entries |
159 | } else |
||
160 | { |
||
2149 | jancik | 161 | p->descriptor_type = pte_descriptor_coarse_table; |
2147 | jancik | 162 | p->access_permission_3 = p->access_permission_0; |
163 | } |
||
164 | |||
165 | p->cacheable = p->bufferable = (flags & PAGE_CACHEABLE) != 0; |
||
166 | // default kernel rw, user none |
||
167 | p->access_permission_0 = p->access_permission_1 = p->access_permission_2 = p->access_permission_3 = pte_ap_user_no_kernel_rw; |
||
168 | if ( flags & PAGE_USER ) { |
||
169 | if ( flags & PAGE_READ ) |
||
170 | p->access_permission_0 = p->access_permission_1 = p->access_permission_2 = p->access_permission_3 = pte_ap_user_ro_kernel_rw; |
||
171 | if ( flags & PAGE_WRITE ) |
||
172 | p->access_permission_0 = p->access_permission_1 = p->access_permission_2 = p->access_permission_3 = pte_ap_user_rw_kernel_rw; |
||
173 | } |
||
174 | return; return; |
||
175 | } |
||
176 | |||
2128 | jermar | 177 | extern void page_arch_init(void); |
178 | |||
179 | #endif /* __ASM__ */ |
||
180 | |||
181 | #endif /* KERNEL */ |
||
182 | |||
183 | #endif |
||
184 | |||
185 | /** @} |
||
186 | */ |
||
2147 | jancik | 187 |