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219 | palkovsky | 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 | |||
1888 | jermar | 29 | /** @addtogroup amd64mm |
1702 | cejka | 30 | * @{ |
31 | */ |
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32 | /** @file |
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33 | */ |
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34 | |||
540 | jermar | 35 | #include <arch/mm/page.h> |
684 | jermar | 36 | #include <genarch/mm/page_pt.h> |
540 | jermar | 37 | #include <arch/mm/frame.h> |
219 | palkovsky | 38 | #include <mm/page.h> |
226 | palkovsky | 39 | #include <mm/frame.h> |
755 | jermar | 40 | #include <mm/as.h> |
226 | palkovsky | 41 | #include <arch/interrupt.h> |
42 | #include <arch/asm.h> |
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43 | #include <config.h> |
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44 | #include <memstr.h> |
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576 | palkovsky | 45 | #include <interrupt.h> |
1051 | jermar | 46 | #include <print.h> |
47 | #include <panic.h> |
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1063 | palkovsky | 48 | #include <align.h> |
226 | palkovsky | 49 | |
1051 | jermar | 50 | /* Definitions for identity page mapper */ |
51 | pte_t helper_ptl1[512] __attribute__((aligned (PAGE_SIZE))); |
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52 | pte_t helper_ptl2[512] __attribute__((aligned (PAGE_SIZE))); |
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53 | pte_t helper_ptl3[512] __attribute__((aligned (PAGE_SIZE))); |
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54 | extern pte_t ptl_0; /* From boot.S */ |
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55 | |||
56 | #define PTL1_PRESENT(ptl0, page) (!(GET_PTL1_FLAGS_ARCH(ptl0, PTL0_INDEX_ARCH(page)) & PAGE_NOT_PRESENT)) |
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57 | #define PTL2_PRESENT(ptl1, page) (!(GET_PTL2_FLAGS_ARCH(ptl1, PTL1_INDEX_ARCH(page)) & PAGE_NOT_PRESENT)) |
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58 | #define PTL3_PRESENT(ptl2, page) (!(GET_PTL3_FLAGS_ARCH(ptl2, PTL2_INDEX_ARCH(page)) & PAGE_NOT_PRESENT)) |
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59 | |||
60 | #define PTL1_ADDR(ptl0, page) ((pte_t *)PA2KA(GET_PTL1_ADDRESS_ARCH(ptl0, PTL0_INDEX_ARCH(page)))) |
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61 | #define PTL2_ADDR(ptl1, page) ((pte_t *)PA2KA(GET_PTL2_ADDRESS_ARCH(ptl1, PTL1_INDEX_ARCH(page)))) |
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62 | #define PTL3_ADDR(ptl2, page) ((pte_t *)PA2KA(GET_PTL3_ADDRESS_ARCH(ptl2, PTL2_INDEX_ARCH(page)))) |
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63 | |||
64 | #define SETUP_PTL1(ptl0, page, tgt) { \ |
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1780 | jermar | 65 | SET_PTL1_ADDRESS_ARCH(ptl0, PTL0_INDEX_ARCH(page), (uintptr_t)KA2PA(tgt)); \ |
1051 | jermar | 66 | SET_PTL1_FLAGS_ARCH(ptl0, PTL0_INDEX_ARCH(page), PAGE_WRITE | PAGE_EXEC); \ |
67 | } |
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68 | #define SETUP_PTL2(ptl1, page, tgt) { \ |
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1780 | jermar | 69 | SET_PTL2_ADDRESS_ARCH(ptl1, PTL1_INDEX_ARCH(page), (uintptr_t)KA2PA(tgt)); \ |
1051 | jermar | 70 | SET_PTL2_FLAGS_ARCH(ptl1, PTL1_INDEX_ARCH(page), PAGE_WRITE | PAGE_EXEC); \ |
71 | } |
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72 | #define SETUP_PTL3(ptl2, page, tgt) { \ |
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1780 | jermar | 73 | SET_PTL3_ADDRESS_ARCH(ptl2, PTL2_INDEX_ARCH(page), (uintptr_t)KA2PA(tgt)); \ |
1051 | jermar | 74 | SET_PTL3_FLAGS_ARCH(ptl2, PTL2_INDEX_ARCH(page), PAGE_WRITE | PAGE_EXEC); \ |
75 | } |
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76 | #define SETUP_FRAME(ptl3, page, tgt) { \ |
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1780 | jermar | 77 | SET_FRAME_ADDRESS_ARCH(ptl3, PTL3_INDEX_ARCH(page), (uintptr_t)KA2PA(tgt)); \ |
1051 | jermar | 78 | SET_FRAME_FLAGS_ARCH(ptl3, PTL3_INDEX_ARCH(page), PAGE_WRITE | PAGE_EXEC); \ |
79 | } |
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1382 | decky | 80 | |
81 | |||
219 | palkovsky | 82 | void page_arch_init(void) |
83 | { |
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1780 | jermar | 84 | uintptr_t cur; |
1063 | palkovsky | 85 | int i; |
86 | int identity_flags = PAGE_CACHEABLE | PAGE_EXEC | PAGE_GLOBAL; |
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226 | palkovsky | 87 | |
88 | if (config.cpu_active == 1) { |
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793 | jermar | 89 | page_mapping_operations = &pt_mapping_operations; |
814 | palkovsky | 90 | |
226 | palkovsky | 91 | /* |
92 | * PA2KA(identity) mapping for all frames. |
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93 | */ |
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540 | jermar | 94 | for (cur = 0; cur < last_frame; cur += FRAME_SIZE) { |
1063 | palkovsky | 95 | /* Standard identity mapping */ |
1064 | palkovsky | 96 | page_mapping_insert(AS_KERNEL, PA2KA(cur), cur, identity_flags); |
226 | palkovsky | 97 | } |
1063 | palkovsky | 98 | /* Upper kernel mapping |
99 | * - from zero to top of kernel (include bottom addresses |
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100 | * because some are needed for init ) |
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101 | */ |
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1833 | decky | 102 | for (cur = PA2KA_CODE(0); cur < config.base + config.kernel_size; cur += FRAME_SIZE) |
1063 | palkovsky | 103 | page_mapping_insert(AS_KERNEL, cur, KA2PA(cur), identity_flags); |
1833 | decky | 104 | |
105 | for (cur = config.stack_base; cur < config.stack_base + config.stack_size; cur += FRAME_SIZE) |
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106 | page_mapping_insert(AS_KERNEL, cur, KA2PA(cur), identity_flags); |
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107 | |||
108 | for (i = 0; i < init.cnt; i++) { |
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109 | for (cur = init.tasks[i].addr; cur < init.tasks[i].addr + init.tasks[i].size; cur += FRAME_SIZE) |
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1063 | palkovsky | 110 | page_mapping_insert(AS_KERNEL, PA2KA_CODE(KA2PA(cur)), KA2PA(cur), identity_flags); |
111 | } |
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112 | |||
799 | palkovsky | 113 | exc_register(14, "page_fault", (iroutine)page_fault); |
1780 | jermar | 114 | write_cr3((uintptr_t) AS_KERNEL->page_table); |
226 | palkovsky | 115 | } |
116 | else { |
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1780 | jermar | 117 | write_cr3((uintptr_t) AS_KERNEL->page_table); |
226 | palkovsky | 118 | } |
219 | palkovsky | 119 | } |
1051 | jermar | 120 | |
1382 | decky | 121 | |
1051 | jermar | 122 | /** Identity page mapper |
123 | * |
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124 | * We need to map whole physical memory identically before the page subsystem |
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125 | * is initializaed. This thing clears page table and fills in the specific |
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126 | * items. |
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127 | */ |
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128 | void ident_page_fault(int n, istate_t *istate) |
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129 | { |
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1780 | jermar | 130 | uintptr_t page; |
131 | static uintptr_t oldpage = 0; |
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1051 | jermar | 132 | pte_t *aptl_1, *aptl_2, *aptl_3; |
133 | |||
134 | page = read_cr2(); |
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135 | if (oldpage) { |
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136 | /* Unmap old address */ |
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137 | aptl_1 = PTL1_ADDR(&ptl_0, oldpage); |
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138 | aptl_2 = PTL2_ADDR(aptl_1, oldpage); |
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139 | aptl_3 = PTL3_ADDR(aptl_2, oldpage); |
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140 | |||
141 | SET_FRAME_FLAGS_ARCH(aptl_3, PTL3_INDEX_ARCH(oldpage), PAGE_NOT_PRESENT); |
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1064 | palkovsky | 142 | if (KA2PA(aptl_3) == KA2PA(helper_ptl3)) |
1051 | jermar | 143 | SET_PTL3_FLAGS_ARCH(aptl_2, PTL2_INDEX_ARCH(oldpage), PAGE_NOT_PRESENT); |
1064 | palkovsky | 144 | if (KA2PA(aptl_2) == KA2PA(helper_ptl2)) |
1051 | jermar | 145 | SET_PTL2_FLAGS_ARCH(aptl_1, PTL1_INDEX_ARCH(oldpage), PAGE_NOT_PRESENT); |
1064 | palkovsky | 146 | if (KA2PA(aptl_1) == KA2PA(helper_ptl1)) |
1051 | jermar | 147 | SET_PTL1_FLAGS_ARCH(&ptl_0, PTL0_INDEX_ARCH(oldpage), PAGE_NOT_PRESENT); |
148 | } |
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149 | if (PTL1_PRESENT(&ptl_0, page)) |
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150 | aptl_1 = PTL1_ADDR(&ptl_0, page); |
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151 | else { |
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152 | SETUP_PTL1(&ptl_0, page, helper_ptl1); |
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153 | aptl_1 = helper_ptl1; |
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154 | } |
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155 | |||
156 | if (PTL2_PRESENT(aptl_1, page)) |
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157 | aptl_2 = PTL2_ADDR(aptl_1, page); |
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158 | else { |
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159 | SETUP_PTL2(aptl_1, page, helper_ptl2); |
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160 | aptl_2 = helper_ptl2; |
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161 | } |
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162 | |||
163 | if (PTL3_PRESENT(aptl_2, page)) |
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164 | aptl_3 = PTL3_ADDR(aptl_2, page); |
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165 | else { |
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166 | SETUP_PTL3(aptl_2, page, helper_ptl3); |
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167 | aptl_3 = helper_ptl3; |
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168 | } |
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169 | |||
170 | SETUP_FRAME(aptl_3, page, page); |
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171 | |||
172 | oldpage = page; |
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173 | } |
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174 | |||
1382 | decky | 175 | |
1051 | jermar | 176 | void page_fault(int n, istate_t *istate) |
177 | { |
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1780 | jermar | 178 | uintptr_t page; |
1411 | jermar | 179 | pf_access_t access; |
1051 | jermar | 180 | |
181 | page = read_cr2(); |
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1411 | jermar | 182 | |
183 | if (istate->error_word & PFERR_CODE_RSVD) |
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184 | panic("Reserved bit set in page table entry.\n"); |
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185 | |||
186 | if (istate->error_word & PFERR_CODE_RW) |
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187 | access = PF_ACCESS_WRITE; |
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188 | else if (istate->error_word & PFERR_CODE_ID) |
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189 | access = PF_ACCESS_EXEC; |
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190 | else |
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191 | access = PF_ACCESS_READ; |
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192 | |||
193 | if (as_page_fault(page, access, istate) == AS_PF_FAULT) { |
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1595 | palkovsky | 194 | fault_if_from_uspace(istate, "Page fault: %#x", page); |
195 | |||
1051 | jermar | 196 | print_info_errcode(n, istate); |
1735 | decky | 197 | printf("Page fault address: %llx\n", page); |
1051 | jermar | 198 | panic("page fault\n"); |
199 | } |
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200 | } |
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1382 | decky | 201 | |
202 | |||
1780 | jermar | 203 | uintptr_t hw_map(uintptr_t physaddr, size_t size) |
1382 | decky | 204 | { |
205 | if (last_frame + ALIGN_UP(size, PAGE_SIZE) > KA2PA(KERNEL_ADDRESS_SPACE_END_ARCH)) |
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206 | panic("Unable to map physical memory %p (%d bytes)", physaddr, size) |
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207 | |||
1780 | jermar | 208 | uintptr_t virtaddr = PA2KA(last_frame); |
1382 | decky | 209 | pfn_t i; |
210 | for (i = 0; i < ADDR2PFN(ALIGN_UP(size, PAGE_SIZE)); i++) |
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211 | page_mapping_insert(AS_KERNEL, virtaddr + PFN2ADDR(i), physaddr + PFN2ADDR(i), PAGE_NOT_CACHEABLE); |
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212 | |||
213 | last_frame = ALIGN_UP(last_frame + size, FRAME_SIZE); |
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214 | |||
215 | return virtaddr; |
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216 | } |
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1702 | cejka | 217 | |
1888 | jermar | 218 | /** @} |
1702 | cejka | 219 | */ |