Rev 1077 | Rev 1089 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed
Rev | Author | Line No. | Line |
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431 | serge | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
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983 | diamond | 3 | ;; Copyright (C) KolibriOS team 2004-2008. All rights reserved. ;; |
431 | serge | 4 | ;; Distributed under terms of the GNU General Public License ;; |
5 | ;; ;; |
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6 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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164 | serge | 7 | |
593 | mikedld | 8 | $Revision: 1081 $ |
9 | |||
10 | |||
164 | serge | 11 | align 4 |
12 | proc alloc_page |
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13 | |||
14 | pushfd |
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15 | cli |
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660 | serge | 16 | push ebx |
164 | serge | 17 | mov ebx, [page_start] |
18 | mov ecx, [page_end] |
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19 | .l1: |
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20 | bsf eax,[ebx]; |
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21 | jnz .found |
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22 | add ebx,4 |
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23 | cmp ebx, ecx |
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24 | jb .l1 |
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660 | serge | 25 | pop ebx |
164 | serge | 26 | popfd |
27 | xor eax,eax |
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28 | ret |
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29 | .found: |
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30 | btr [ebx], eax |
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31 | mov [page_start],ebx |
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32 | sub ebx, sys_pgmap |
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254 | serge | 33 | lea eax, [eax+ebx*8] |
164 | serge | 34 | shl eax, 12 |
35 | dec [pg_data.pages_free] |
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660 | serge | 36 | pop ebx |
164 | serge | 37 | popfd |
38 | ret |
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39 | endp |
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40 | |||
41 | align 4 |
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42 | proc alloc_pages stdcall, count:dword |
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43 | pushfd |
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660 | serge | 44 | push ebx |
45 | push edi |
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164 | serge | 46 | cli |
47 | mov eax, [count] |
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48 | add eax, 7 |
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49 | shr eax, 3 |
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50 | mov [count], eax |
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51 | cmp eax, [pg_data.pages_free] |
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52 | ja .fail |
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53 | |||
54 | mov ecx, [page_start] |
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55 | mov ebx, [page_end] |
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56 | .find: |
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57 | mov edx, [count] |
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58 | mov edi, ecx |
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59 | .match: |
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60 | cmp byte [ecx], 0xFF |
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61 | jne .next |
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62 | dec edx |
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63 | jz .ok |
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64 | inc ecx |
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65 | cmp ecx,ebx |
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66 | jb .match |
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660 | serge | 67 | .fail: |
68 | xor eax, eax |
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69 | pop edi |
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70 | pop ebx |
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164 | serge | 71 | popfd |
72 | ret |
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73 | .next: |
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74 | inc ecx |
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75 | cmp ecx, ebx |
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76 | jb .find |
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660 | serge | 77 | pop edi |
78 | pop ebx |
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164 | serge | 79 | popfd |
80 | xor eax, eax |
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81 | ret |
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82 | .ok: |
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83 | sub ecx, edi |
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84 | inc ecx |
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663 | serge | 85 | push esi |
164 | serge | 86 | mov esi, edi |
87 | xor eax, eax |
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88 | rep stosb |
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89 | sub esi, sys_pgmap |
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90 | shl esi, 3+12 |
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91 | mov eax, esi |
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92 | mov ebx, [count] |
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93 | shl ebx, 3 |
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94 | sub [pg_data.pages_free], ebx |
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663 | serge | 95 | pop esi |
660 | serge | 96 | pop edi |
97 | pop ebx |
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164 | serge | 98 | popfd |
99 | ret |
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100 | endp |
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101 | |||
102 | align 4 |
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103 | proc map_page stdcall,lin_addr:dword,phis_addr:dword,flags:dword |
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321 | diamond | 104 | push ebx |
164 | serge | 105 | mov eax, [phis_addr] |
106 | and eax, not 0xFFF |
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107 | or eax, [flags] |
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108 | mov ebx, [lin_addr] |
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109 | shr ebx, 12 |
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365 | serge | 110 | mov [page_tabs+ebx*4], eax |
164 | serge | 111 | mov eax, [lin_addr] |
112 | invlpg [eax] |
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321 | diamond | 113 | pop ebx |
164 | serge | 114 | ret |
115 | endp |
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116 | |||
117 | align 4 |
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281 | serge | 118 | map_space: ;not implemented |
119 | |||
120 | |||
121 | ret |
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122 | |||
123 | |||
124 | align 4 |
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164 | serge | 125 | proc free_page |
126 | ;arg: eax page address |
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127 | pushfd |
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128 | cli |
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819 | serge | 129 | shr eax, 12 ;page index |
130 | bts dword [sys_pgmap], eax ;that's all! |
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291 | serge | 131 | cmc |
328 | serge | 132 | adc [pg_data.pages_free], 0 |
164 | serge | 133 | shr eax, 3 |
819 | serge | 134 | and eax, not 3 ;dword offset from page_map |
448 | diamond | 135 | add eax, sys_pgmap |
164 | serge | 136 | cmp [page_start], eax |
137 | ja @f |
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138 | popfd |
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139 | ret |
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140 | @@: |
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141 | mov [page_start], eax |
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142 | popfd |
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143 | ret |
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144 | endp |
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145 | |||
741 | serge | 146 | proc map_io_mem stdcall, base:dword, size:dword, flags:dword |
147 | |||
148 | push ebx |
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149 | push edi |
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150 | mov eax, [size] |
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151 | add eax, 4095 |
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152 | and eax, -4096 |
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153 | mov [size], eax |
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154 | stdcall alloc_kernel_space, eax |
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155 | test eax, eax |
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156 | jz .fail |
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157 | push eax |
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158 | |||
159 | mov edi, 0x1000 |
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160 | mov ebx, eax |
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161 | mov ecx,[size] |
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162 | mov edx, [base] |
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163 | shr eax, 12 |
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164 | shr ecx, 12 |
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165 | and edx, -4096 |
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166 | or edx, [flags] |
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167 | @@: |
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168 | mov [page_tabs+eax*4], edx |
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819 | serge | 169 | ; push eax |
170 | ; invlpg [ebx] |
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171 | ; pop eax |
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741 | serge | 172 | inc eax |
173 | add ebx, edi |
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174 | add edx, edi |
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175 | loop @B |
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176 | |||
177 | pop eax |
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178 | mov edx, [base] |
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179 | and edx, 4095 |
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180 | add eax, edx |
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181 | .fail: |
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182 | pop edi |
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183 | pop ebx |
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184 | ret |
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185 | endp |
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186 | |||
279 | serge | 187 | ; param |
328 | serge | 188 | ; eax= page base + page flags |
819 | serge | 189 | ; ebx= linear address |
281 | serge | 190 | ; ecx= count |
191 | |||
192 | align 4 |
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328 | serge | 193 | commit_pages: |
741 | serge | 194 | push edi |
328 | serge | 195 | test ecx, ecx |
196 | jz .fail |
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281 | serge | 197 | |
328 | serge | 198 | mov edi, ebx |
199 | mov ebx, pg_data.pg_mutex |
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200 | call wait_mutex ;ebx |
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201 | |||
202 | mov edx, 0x1000 |
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203 | mov ebx, edi |
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204 | shr ebx, 12 |
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205 | @@: |
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365 | serge | 206 | mov [page_tabs+ebx*4], eax |
819 | serge | 207 | ; push eax |
208 | ; invlpg [edi] |
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209 | ; pop eax |
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328 | serge | 210 | add edi, edx |
211 | add eax, edx |
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212 | inc ebx |
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213 | dec ecx |
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214 | jnz @B |
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215 | mov [pg_data.pg_mutex],ecx |
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216 | .fail: |
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741 | serge | 217 | pop edi |
281 | serge | 218 | ret |
219 | |||
328 | serge | 220 | |
281 | serge | 221 | ; param |
279 | serge | 222 | ; eax= base |
281 | serge | 223 | ; ecx= count |
279 | serge | 224 | |
164 | serge | 225 | align 4 |
279 | serge | 226 | release_pages: |
321 | diamond | 227 | |
228 | pushad |
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279 | serge | 229 | mov ebx, pg_data.pg_mutex |
230 | call wait_mutex ;ebx |
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231 | |||
232 | mov esi, eax |
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233 | mov edi, eax |
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234 | |||
235 | shr esi, 10 |
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365 | serge | 236 | add esi, page_tabs |
328 | serge | 237 | |
238 | mov ebp, [pg_data.pages_free] |
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279 | serge | 239 | mov ebx, [page_start] |
240 | mov edx, sys_pgmap |
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241 | @@: |
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242 | xor eax, eax |
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243 | xchg eax, [esi] |
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924 | serge | 244 | push eax |
279 | serge | 245 | invlpg [edi] |
924 | serge | 246 | pop eax |
279 | serge | 247 | |
248 | test eax, 1 |
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249 | jz .next |
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250 | |||
251 | shr eax, 12 |
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252 | bts [edx], eax |
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291 | serge | 253 | cmc |
328 | serge | 254 | adc ebp, 0 |
279 | serge | 255 | shr eax, 3 |
256 | and eax, -4 |
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257 | add eax, edx |
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258 | cmp eax, ebx |
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259 | jae .next |
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260 | |||
261 | mov ebx, eax |
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262 | .next: |
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263 | add edi, 0x1000 |
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264 | add esi, 4 |
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265 | dec ecx |
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266 | jnz @B |
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328 | serge | 267 | mov [pg_data.pages_free], ebp |
279 | serge | 268 | and [pg_data.pg_mutex],0 |
321 | diamond | 269 | popad |
279 | serge | 270 | ret |
271 | |||
819 | serge | 272 | ; param |
273 | ; eax= base |
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274 | ; ecx= count |
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275 | |||
279 | serge | 276 | align 4 |
819 | serge | 277 | unmap_pages: |
278 | |||
279 | push edi |
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280 | |||
281 | mov edi, eax |
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282 | mov edx, eax |
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283 | |||
284 | shr edi, 10 |
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285 | add edi, page_tabs |
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286 | |||
287 | xor eax, eax |
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288 | @@: |
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289 | stosd |
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290 | invlpg [edx] |
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291 | add edx, 0x1000 |
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292 | loop @b |
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293 | |||
294 | pop edi |
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295 | ret |
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296 | |||
297 | |||
298 | align 4 |
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188 | serge | 299 | proc map_page_table stdcall, lin_addr:dword, phis_addr:dword |
321 | diamond | 300 | push ebx |
164 | serge | 301 | mov ebx, [lin_addr] |
302 | shr ebx, 22 |
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303 | mov eax, [phis_addr] |
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304 | and eax, not 0xFFF |
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305 | or eax, PG_UW ;+PG_NOCACHE |
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378 | serge | 306 | mov dword [master_tab+ebx*4], eax |
164 | serge | 307 | mov eax, [lin_addr] |
308 | shr eax, 10 |
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365 | serge | 309 | add eax, page_tabs |
164 | serge | 310 | invlpg [eax] |
321 | diamond | 311 | pop ebx |
164 | serge | 312 | ret |
313 | endp |
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314 | |||
315 | align 4 |
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316 | proc init_LFB |
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378 | serge | 317 | locals |
318 | pg_count dd ? |
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319 | endl |
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320 | |||
164 | serge | 321 | cmp dword [LFBAddress], -1 |
322 | jne @f |
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412 | serge | 323 | mov [BOOT_VAR+0x901c],byte 2 |
164 | serge | 324 | stdcall kernel_alloc, 0x280000 |
325 | mov [LFBAddress], eax |
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326 | ret |
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327 | @@: |
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328 | test [SCR_MODE],word 0100000000000000b |
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211 | serge | 329 | jnz @f |
412 | serge | 330 | mov [BOOT_VAR+0x901c],byte 2 |
211 | serge | 331 | ret |
332 | @@: |
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490 | serge | 333 | call init_mtrr |
334 | |||
378 | serge | 335 | mov edx, LFB_BASE |
336 | mov esi, [LFBAddress] |
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465 | serge | 337 | mov edi, 0x00800000 |
379 | serge | 338 | mov dword [exp_lfb+4], edx |
214 | serge | 339 | |
164 | serge | 340 | shr edi, 12 |
341 | mov [pg_count], edi |
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342 | shr edi, 10 |
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343 | |||
344 | bt [cpu_caps], CAPS_PSE |
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345 | jnc .map_page_tables |
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346 | or esi, PG_LARGE+PG_UW |
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465 | serge | 347 | mov edx, sys_pgdir+(LFB_BASE shr 20) |
164 | serge | 348 | @@: |
465 | serge | 349 | mov [edx], esi |
378 | serge | 350 | add edx, 4 |
164 | serge | 351 | add esi, 0x00400000 |
352 | dec edi |
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353 | jnz @B |
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354 | |||
207 | serge | 355 | bt [cpu_caps], CAPS_PGE |
356 | jnc @F |
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465 | serge | 357 | or dword [sys_pgdir+(LFB_BASE shr 20)], PG_GLOBAL |
207 | serge | 358 | @@: |
378 | serge | 359 | mov dword [LFBAddress], LFB_BASE |
164 | serge | 360 | mov eax, cr3 ;flush TLB |
361 | mov cr3, eax |
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362 | ret |
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363 | |||
364 | .map_page_tables: |
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365 | |||
465 | serge | 366 | @@: |
164 | serge | 367 | call alloc_page |
378 | serge | 368 | stdcall map_page_table, edx, eax |
389 | serge | 369 | add edx, 0x00400000 |
164 | serge | 370 | dec edi |
465 | serge | 371 | jnz @B |
164 | serge | 372 | |
373 | mov eax, [LFBAddress] |
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378 | serge | 374 | mov edi, page_tabs + (LFB_BASE shr 10) |
164 | serge | 375 | or eax, PG_UW |
376 | mov ecx, [pg_count] |
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378 | serge | 377 | cld |
389 | serge | 378 | @@: |
379 | stosd |
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380 | add eax, 0x1000 |
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381 | dec ecx |
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382 | jnz @B |
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164 | serge | 383 | |
378 | serge | 384 | mov dword [LFBAddress], LFB_BASE |
164 | serge | 385 | mov eax, cr3 ;flush TLB |
386 | mov cr3, eax |
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387 | |||
388 | ret |
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389 | endp |
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390 | |||
391 | align 4 |
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392 | proc new_mem_resize stdcall, new_size:dword |
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393 | |||
276 | serge | 394 | mov ebx, pg_data.pg_mutex |
395 | call wait_mutex ;ebx |
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164 | serge | 396 | |
397 | mov edi, [new_size] |
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398 | add edi,4095 |
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399 | and edi,not 4095 |
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400 | mov [new_size], edi |
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401 | |||
465 | serge | 402 | mov edx,[current_slot] |
403 | cmp [edx+APPDATA.heap_base],0 |
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172 | serge | 404 | jne .exit |
405 | |||
465 | serge | 406 | mov esi, [edx+APPDATA.mem_size] |
164 | serge | 407 | add esi, 4095 |
408 | and esi, not 4095 |
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409 | |||
410 | cmp edi, esi |
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411 | jae .expand |
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412 | |||
413 | shr edi, 12 |
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414 | shr esi, 12 |
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415 | @@: |
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378 | serge | 416 | mov eax, [app_page_tabs+edi*4] |
164 | serge | 417 | test eax, 1 |
418 | jz .next |
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378 | serge | 419 | mov dword [app_page_tabs+edi*4], 2 |
164 | serge | 420 | mov ebx, edi |
421 | shl ebx, 12 |
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924 | serge | 422 | push eax |
659 | serge | 423 | invlpg [ebx] |
924 | serge | 424 | pop eax |
164 | serge | 425 | call free_page |
426 | |||
427 | .next: add edi, 1 |
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428 | cmp edi, esi |
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429 | jb @B |
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430 | |||
431 | .update_size: |
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465 | serge | 432 | mov ebx, [new_size] |
433 | call update_mem_size |
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164 | serge | 434 | |
435 | xor eax, eax |
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436 | dec [pg_data.pg_mutex] |
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437 | ret |
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438 | .expand: |
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439 | |||
440 | push esi |
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441 | push edi |
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442 | |||
443 | add edi, 0x3FFFFF |
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444 | and edi, not(0x3FFFFF) |
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445 | add esi, 0x3FFFFF |
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446 | and esi, not(0x3FFFFF) |
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447 | |||
448 | cmp esi, edi |
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449 | jae .grow |
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450 | |||
451 | xchg esi, edi |
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452 | |||
453 | @@: |
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454 | call alloc_page |
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455 | test eax, eax |
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456 | jz .exit |
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457 | |||
188 | serge | 458 | stdcall map_page_table, edi, eax |
164 | serge | 459 | |
460 | push edi |
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461 | shr edi, 10 |
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365 | serge | 462 | add edi, page_tabs |
164 | serge | 463 | mov ecx, 1024 |
464 | xor eax, eax |
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465 | cld |
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466 | rep stosd |
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467 | pop edi |
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468 | |||
469 | add edi, 0x00400000 |
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470 | cmp edi, esi |
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471 | jb @B |
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472 | .grow: |
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473 | pop edi |
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474 | pop esi |
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475 | @@: |
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476 | call alloc_page |
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477 | test eax, eax |
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478 | jz .exit |
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479 | stdcall map_page,esi,eax,dword PG_UW |
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480 | |||
481 | push edi |
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482 | mov edi, esi |
||
483 | xor eax, eax |
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484 | mov ecx, 1024 |
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485 | cld |
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486 | rep stosd |
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487 | pop edi |
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488 | |||
489 | add esi, 0x1000 |
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490 | cmp esi, edi |
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294 | diamond | 491 | jb @B |
164 | serge | 492 | |
493 | jmp .update_size |
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494 | .exit: |
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495 | xor eax, eax |
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496 | inc eax |
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497 | dec [pg_data.pg_mutex] |
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498 | ret |
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499 | endp |
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500 | |||
294 | diamond | 501 | update_mem_size: |
465 | serge | 502 | ; in: edx = slot base |
294 | diamond | 503 | ; ebx = new memory size |
504 | ; destroys eax,ecx,edx |
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505 | |||
465 | serge | 506 | mov [APPDATA.mem_size+edx],ebx |
294 | diamond | 507 | ;search threads and update |
508 | ;application memory size infomation |
||
465 | serge | 509 | mov ecx,[APPDATA.dir_table+edx] |
294 | diamond | 510 | mov eax,2 |
511 | |||
512 | .search_threads: |
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513 | ;eax = current slot |
||
514 | ;ebx = new memory size |
||
515 | ;ecx = page directory |
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516 | cmp eax,[TASK_COUNT] |
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517 | jg .search_threads_end |
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518 | mov edx,eax |
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519 | shl edx,5 |
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520 | cmp word [CURRENT_TASK+edx+TASKDATA.state],9 ;if slot empty? |
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521 | jz .search_threads_next |
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522 | shl edx,3 |
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380 | serge | 523 | cmp [SLOT_BASE+edx+APPDATA.dir_table],ecx ;if it is our thread? |
294 | diamond | 524 | jnz .search_threads_next |
380 | serge | 525 | mov [SLOT_BASE+edx+APPDATA.mem_size],ebx ;update memory size |
294 | diamond | 526 | .search_threads_next: |
527 | inc eax |
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528 | jmp .search_threads |
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529 | .search_threads_end: |
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530 | ret |
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531 | |||
285 | serge | 532 | ; param |
533 | ; eax= linear address |
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534 | ; |
||
535 | ; retval |
||
536 | ; eax= phisical page address |
||
537 | |||
164 | serge | 538 | align 4 |
285 | serge | 539 | get_pg_addr: |
540 | shr eax, 12 |
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365 | serge | 541 | mov eax, [page_tabs+eax*4] |
164 | serge | 542 | and eax, 0xFFFFF000 |
543 | ret |
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544 | |||
465 | serge | 545 | |
188 | serge | 546 | align 4 |
1056 | Galkov | 547 | ; Now it is called from sys32::exc_c (see stack frame there) |
164 | serge | 548 | proc page_fault_handler |
465 | serge | 549 | |
1056 | Galkov | 550 | .err_addr equ ebp-4 |
709 | diamond | 551 | |
1056 | Galkov | 552 | mov ebp, esp |
553 | mov ebx, cr2 |
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554 | push ebx ; that is locals: .err_addr = cr2 |
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555 | inc [pg_data.pages_faults] |
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465 | serge | 556 | |
557 | ; push eax |
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558 | ; push edx |
||
559 | ; mov edx, 0x400 ;bochs |
||
560 | ; mov al,0xff ;bochs |
||
561 | ; out dx, al ;bochs |
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562 | ; pop edx |
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563 | ; pop eax |
||
164 | serge | 564 | |
1056 | Galkov | 565 | mov eax, [pf_err_code] |
164 | serge | 566 | |
1056 | Galkov | 567 | cmp ebx, OS_BASE ;ebx == .err_addr |
568 | jb .user_space ;ñòðàíèöà â ïàìÿòè ïðèëîæåíèÿ ; |
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188 | serge | 569 | |
1056 | Galkov | 570 | cmp ebx, page_tabs |
571 | jb .kernel_space ;ñòðàíèöà â ïàìÿòè ÿäðà |
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164 | serge | 572 | |
1056 | Galkov | 573 | cmp ebx, kernel_tabs |
574 | jb .alloc;.app_tabs ;òàáëèöû ñòðàíèö ïðèëîæåíèÿ ; |
||
575 | ;ïðîñòî ñîçäàäèì îäíó |
||
576 | if 0 ;ïîêà ýòî ïðîñòî ëèøíåå |
||
577 | cmp ebx, LFB_BASE |
||
578 | jb .core_tabs ;òàáëèöû ñòðàíèö ÿäðà |
||
579 | ;Îøèáêà |
||
580 | .lfb: |
||
581 | ;îáëàñòü LFB |
||
582 | ;Îøèáêà |
||
583 | jmp .fail |
||
584 | end if |
||
585 | .core_tabs: |
||
586 | .fail: ;simply return to caller |
||
587 | mov esp, ebp |
||
588 | mov bl, 14 ;#PF |
||
589 | ret |
||
378 | serge | 590 | |
164 | serge | 591 | .user_space: |
1056 | Galkov | 592 | test eax, PG_MAP |
593 | jnz .err_access ;Ñòðàíèöà ïðèñóòñòâóåò |
||
594 | ;Îøèáêà äîñòóïà ? |
||
465 | serge | 595 | |
1056 | Galkov | 596 | shr ebx, 12 |
597 | mov ecx, ebx |
||
598 | shr ecx, 10 |
||
599 | mov edx, [master_tab+ecx*4] |
||
600 | test edx, PG_MAP |
||
601 | jz .fail ;òàáëèöà ñòðàíèö íå ñîçäàíà |
||
602 | ;íåâåðíûé àäðåñ â ïðîãðàììå |
||
172 | serge | 603 | |
1056 | Galkov | 604 | mov eax, [page_tabs+ebx*4] |
605 | test eax, 2 |
||
606 | jz .fail ;àäðåñ íå çàðåçåðâèðîâàí äëÿ ; |
||
607 | ;èñïîëüçîâàíèÿ. Îøèáêà |
||
188 | serge | 608 | .alloc: |
1056 | Galkov | 609 | call alloc_page |
610 | test eax, eax |
||
611 | jz .fail |
||
164 | serge | 612 | |
1056 | Galkov | 613 | stdcall map_page,[.err_addr],eax,dword PG_UW |
164 | serge | 614 | |
1056 | Galkov | 615 | mov edi, [.err_addr] |
616 | and edi, 0xFFFFF000 |
||
617 | mov ecx, 1024 |
||
618 | xor eax, eax |
||
619 | ;cld ;caller is duty for this |
||
620 | rep stosd |
||
621 | .exit: ;iret with repeat fault instruction |
||
622 | add esp,8 ; clear in stack: locals(.err_addr) + ret_to_caller |
||
623 | restore_ring3_context |
||
624 | iretd |
||
465 | serge | 625 | |
1056 | Galkov | 626 | .err_access = .fail |
465 | serge | 627 | ;íèêîãäà íå ïðîèñõîäèò |
1056 | Galkov | 628 | ;jmp .fail |
465 | serge | 629 | |
630 | .kernel_space: |
||
1056 | Galkov | 631 | test eax, PG_MAP |
632 | jz .fail ;ñòðàíèöà íå ïðèñóòñòâóåò |
||
465 | serge | 633 | |
1056 | Galkov | 634 | test eax,12 ;U/S (+below) |
635 | jnz .fail ;ïðèëîæåíèå îáðàòèëîñü ê ïàìÿòè |
||
636 | ;ÿäðà |
||
637 | ;test eax, 8 |
||
638 | ;jnz .fail ;óñòàíîâëåí çàðåçåðâèðîâàííûé áèò |
||
639 | ;â òàáëèöàõ ñòðàíèö. äîáàâëåíî â P4/Xeon |
||
465 | serge | 640 | |
641 | ;ïîïûòêà çàïèñè â çàùèù¸ííóþ ñòðàíèöó ÿäðà |
||
642 | |||
1056 | Galkov | 643 | cmp ebx, tss._io_map_0 |
644 | jb .fail |
||
465 | serge | 645 | |
1056 | Galkov | 646 | cmp ebx, tss._io_map_0+8192 |
647 | jae .fail |
||
465 | serge | 648 | |
649 | ; io permission map |
||
650 | ; copy-on-write protection |
||
651 | |||
1056 | Galkov | 652 | call alloc_page |
653 | test eax, eax |
||
654 | jz .fail |
||
465 | serge | 655 | |
1056 | Galkov | 656 | push eax |
657 | stdcall map_page,[.err_addr],eax,dword PG_SW |
||
658 | pop eax |
||
659 | mov edi, [.err_addr] |
||
660 | and edi, -4096 |
||
661 | lea esi, [edi+(not tss._io_map_0)+1]; -tss._io_map_0 |
||
465 | serge | 662 | |
1056 | Galkov | 663 | mov ebx, esi |
664 | shr ebx, 12 |
||
665 | mov edx, [current_slot] |
||
666 | or eax, PG_SW |
||
667 | mov [edx+APPDATA.io_map+ebx*4], eax |
||
465 | serge | 668 | |
1056 | Galkov | 669 | add esi, [default_io_map] |
670 | mov ecx, 4096/4 |
||
671 | ;cld ;caller is duty for this |
||
672 | rep movsd |
||
673 | jmp .exit |
||
164 | serge | 674 | endp |
675 | |||
676 | align 4 |
||
677 | proc map_mem stdcall, lin_addr:dword,pdir:dword,\ |
||
678 | ofs:dword,buf_size:dword |
||
679 | mov eax, [buf_size] |
||
680 | test eax, eax |
||
681 | jz .exit |
||
682 | |||
683 | mov eax, [pdir] |
||
684 | and eax, 0xFFFFF000 |
||
685 | |||
536 | diamond | 686 | stdcall map_page,[ipc_pdir],eax,PG_UW |
164 | serge | 687 | mov ebx, [ofs] |
688 | shr ebx, 22 |
||
689 | mov esi, [ipc_pdir] |
||
690 | mov edi, [ipc_ptab] |
||
691 | mov eax, [esi+ebx*4] |
||
692 | and eax, 0xFFFFF000 |
||
693 | jz .exit |
||
536 | diamond | 694 | stdcall map_page,edi,eax,PG_UW |
164 | serge | 695 | ; inc ebx |
696 | ; add edi, 0x1000 |
||
697 | ; mov eax, [esi+ebx*4] |
||
698 | ; test eax, eax |
||
699 | ; jz @f |
||
700 | ; and eax, 0xFFFFF000 |
||
701 | ; stdcall map_page, edi, eax |
||
702 | |||
703 | @@: mov edi, [lin_addr] |
||
704 | and edi, 0xFFFFF000 |
||
705 | mov ecx, [buf_size] |
||
706 | add ecx, 4095 |
||
707 | shr ecx, 12 |
||
708 | inc ecx |
||
709 | |||
710 | mov edx, [ofs] |
||
711 | shr edx, 12 |
||
712 | and edx, 0x3FF |
||
713 | mov esi, [ipc_ptab] |
||
714 | |||
715 | .map: mov eax, [esi+edx*4] |
||
716 | and eax, 0xFFFFF000 |
||
536 | diamond | 717 | jz .exit |
718 | stdcall map_page,edi,eax,PG_UW |
||
719 | dec ecx |
||
720 | jz .exit |
||
164 | serge | 721 | add edi, 0x1000 |
722 | inc edx |
||
536 | diamond | 723 | cmp edx, 0x400 |
164 | serge | 724 | jnz .map |
536 | diamond | 725 | inc ebx |
726 | mov eax, [ipc_pdir] |
||
727 | mov eax, [eax+ebx*4] |
||
728 | and eax, 0xFFFFF000 |
||
729 | jz .exit |
||
730 | stdcall map_page,esi,eax,PG_UW |
||
731 | xor edx, edx |
||
732 | jmp .map |
||
164 | serge | 733 | |
734 | .exit: |
||
735 | ret |
||
736 | endp |
||
737 | |||
738 | align 4 |
||
739 | proc map_memEx stdcall, lin_addr:dword,pdir:dword,\ |
||
740 | ofs:dword,buf_size:dword |
||
741 | mov eax, [buf_size] |
||
742 | test eax, eax |
||
743 | jz .exit |
||
744 | |||
745 | mov eax, [pdir] |
||
746 | and eax, 0xFFFFF000 |
||
747 | |||
748 | stdcall map_page,[proc_mem_pdir],eax,dword PG_UW |
||
749 | mov ebx, [ofs] |
||
750 | shr ebx, 22 |
||
751 | mov esi, [proc_mem_pdir] |
||
752 | mov edi, [proc_mem_tab] |
||
753 | mov eax, [esi+ebx*4] |
||
754 | and eax, 0xFFFFF000 |
||
755 | test eax, eax |
||
756 | jz .exit |
||
757 | stdcall map_page,edi,eax,dword PG_UW |
||
758 | |||
759 | @@: mov edi, [lin_addr] |
||
760 | and edi, 0xFFFFF000 |
||
761 | mov ecx, [buf_size] |
||
762 | add ecx, 4095 |
||
763 | shr ecx, 12 |
||
764 | inc ecx |
||
765 | |||
766 | mov edx, [ofs] |
||
767 | shr edx, 12 |
||
768 | and edx, 0x3FF |
||
769 | mov esi, [proc_mem_tab] |
||
770 | |||
771 | .map: mov eax, [esi+edx*4] |
||
772 | ; and eax, 0xFFFFF000 |
||
773 | ; test eax, eax |
||
774 | ; jz .exit |
||
775 | stdcall map_page,edi,eax,dword PG_UW |
||
776 | add edi, 0x1000 |
||
777 | inc edx |
||
778 | dec ecx |
||
779 | jnz .map |
||
780 | .exit: |
||
781 | ret |
||
782 | endp |
||
783 | |||
784 | |||
785 | |||
786 | |||
787 | sys_IPC: |
||
788 | ;input: |
||
789 | ; eax=1 - set ipc buffer area |
||
790 | ; ebx=address of buffer |
||
791 | ; ecx=size of buffer |
||
792 | ; eax=2 - send message |
||
793 | ; ebx=PID |
||
794 | ; ecx=address of message |
||
795 | ; edx=size of message |
||
796 | |||
797 | cmp eax,1 |
||
798 | jne @f |
||
799 | call set_ipc_buff |
||
800 | mov [esp+36], eax |
||
801 | ret |
||
802 | @@: |
||
803 | cmp eax, 2 |
||
804 | jne @f |
||
805 | stdcall sys_ipc_send, ebx, ecx, edx |
||
806 | mov [esp+36], eax |
||
807 | ret |
||
808 | @@: |
||
809 | xor eax, eax |
||
810 | not eax |
||
811 | mov [esp+36], eax |
||
812 | ret |
||
813 | |||
814 | align 4 |
||
815 | proc set_ipc_buff |
||
816 | |||
465 | serge | 817 | mov eax,[current_slot] |
164 | serge | 818 | pushf |
819 | cli |
||
465 | serge | 820 | mov [eax+APPDATA.ipc_start],ebx ;set fields in extended information area |
821 | mov [eax+APPDATA.ipc_size],ecx |
||
164 | serge | 822 | |
823 | add ecx, ebx |
||
824 | add ecx, 4095 |
||
825 | and ecx, not 4095 |
||
826 | |||
827 | .touch: mov eax, [ebx] |
||
828 | add ebx, 0x1000 |
||
829 | cmp ebx, ecx |
||
536 | diamond | 830 | jb .touch |
164 | serge | 831 | |
832 | popf |
||
833 | xor eax, eax |
||
834 | ret |
||
835 | endp |
||
836 | |||
837 | proc sys_ipc_send stdcall, PID:dword, msg_addr:dword, msg_size:dword |
||
838 | locals |
||
839 | dst_slot dd ? |
||
840 | dst_offset dd ? |
||
841 | buf_size dd ? |
||
536 | diamond | 842 | used_buf dd ? |
164 | serge | 843 | endl |
844 | |||
845 | pushf |
||
846 | cli |
||
847 | |||
848 | mov eax, [PID] |
||
849 | call pid_to_slot |
||
850 | test eax,eax |
||
851 | jz .no_pid |
||
852 | |||
853 | mov [dst_slot], eax |
||
854 | shl eax,8 |
||
380 | serge | 855 | mov edi,[eax+SLOT_BASE+0xa0] ;is ipc area defined? |
164 | serge | 856 | test edi,edi |
857 | jz .no_ipc_area |
||
858 | |||
859 | mov ebx, edi |
||
860 | and ebx, 0xFFF |
||
861 | mov [dst_offset], ebx |
||
862 | |||
380 | serge | 863 | mov esi, [eax+SLOT_BASE+0xa4] |
164 | serge | 864 | mov [buf_size], esi |
865 | |||
536 | diamond | 866 | mov ecx, [ipc_tmp] |
867 | cmp esi, 0x40000-0x1000 ; size of [ipc_tmp] minus one page |
||
868 | jbe @f |
||
869 | push eax esi edi |
||
870 | add esi,0x1000 |
||
871 | stdcall alloc_kernel_space,esi |
||
872 | mov ecx, eax |
||
873 | pop edi esi eax |
||
874 | @@: |
||
875 | mov [used_buf], ecx |
||
876 | stdcall map_mem, ecx, [SLOT_BASE+eax+0xB8],\ |
||
164 | serge | 877 | edi, esi |
878 | |||
879 | mov edi, [dst_offset] |
||
536 | diamond | 880 | add edi, [used_buf] |
164 | serge | 881 | cmp dword [edi], 0 |
882 | jnz .ipc_blocked ;if dword [buffer]<>0 - ipc blocked now |
||
227 | serge | 883 | |
566 | serge | 884 | mov edx, dword [edi+4] |
885 | lea ebx, [edx+8] |
||
164 | serge | 886 | add ebx, [msg_size] |
887 | cmp ebx, [buf_size] |
||
888 | ja .buffer_overflow ;esi<0 - not enough memory in buffer |
||
227 | serge | 889 | |
164 | serge | 890 | mov dword [edi+4], ebx |
891 | mov eax,[TASK_BASE] |
||
892 | mov eax, [eax+0x04] ;eax - our PID |
||
893 | add edi, edx |
||
894 | mov [edi], eax |
||
895 | mov ecx, [msg_size] |
||
896 | |||
897 | mov [edi+4], ecx |
||
898 | add edi, 8 |
||
899 | mov esi, [msg_addr] |
||
465 | serge | 900 | ; add esi, new_app_base |
164 | serge | 901 | cld |
902 | rep movsb |
||
903 | |||
904 | mov ebx, [ipc_tmp] |
||
905 | mov edx, ebx |
||
906 | shr ebx, 12 |
||
907 | xor eax, eax |
||
365 | serge | 908 | mov [page_tabs+ebx*4], eax |
164 | serge | 909 | invlpg [edx] |
910 | |||
911 | mov ebx, [ipc_pdir] |
||
912 | mov edx, ebx |
||
913 | shr ebx, 12 |
||
914 | xor eax, eax |
||
365 | serge | 915 | mov [page_tabs+ebx*4], eax |
164 | serge | 916 | invlpg [edx] |
917 | |||
918 | mov ebx, [ipc_ptab] |
||
919 | mov edx, ebx |
||
920 | shr ebx, 12 |
||
921 | xor eax, eax |
||
365 | serge | 922 | mov [page_tabs+ebx*4], eax |
164 | serge | 923 | invlpg [edx] |
924 | |||
925 | mov eax, [dst_slot] |
||
926 | shl eax, 8 |
||
380 | serge | 927 | or [eax+SLOT_BASE+0xA8],dword 0x40 |
164 | serge | 928 | cmp dword [check_idle_semaphore],20 |
929 | jge .ipc_no_cis |
||
930 | |||
931 | mov dword [check_idle_semaphore],5 |
||
932 | .ipc_no_cis: |
||
536 | diamond | 933 | push 0 |
934 | jmp .ret |
||
164 | serge | 935 | .no_pid: |
936 | popf |
||
536 | diamond | 937 | mov eax, 4 |
164 | serge | 938 | ret |
939 | .no_ipc_area: |
||
940 | popf |
||
941 | xor eax, eax |
||
942 | inc eax |
||
943 | ret |
||
944 | .ipc_blocked: |
||
536 | diamond | 945 | push 2 |
946 | jmp .ret |
||
164 | serge | 947 | .buffer_overflow: |
536 | diamond | 948 | push 3 |
949 | .ret: |
||
950 | mov eax, [used_buf] |
||
951 | cmp eax, [ipc_tmp] |
||
952 | jz @f |
||
953 | stdcall free_kernel_space,eax |
||
954 | @@: |
||
955 | pop eax |
||
164 | serge | 956 | popf |
957 | ret |
||
958 | endp |
||
959 | |||
960 | align 4 |
||
170 | serge | 961 | sysfn_meminfo: |
164 | serge | 962 | |
1072 | diamond | 963 | ; add ecx, new_app_base |
964 | cmp ecx, OS_BASE |
||
465 | serge | 965 | jae .fail |
172 | serge | 966 | |
164 | serge | 967 | mov eax, [pg_data.pages_count] |
1072 | diamond | 968 | mov [ecx], eax |
172 | serge | 969 | shl eax, 12 |
1072 | diamond | 970 | mov [esp+32], eax |
971 | mov eax, [pg_data.pages_free] |
||
972 | mov [ecx+4], eax |
||
973 | mov eax, [pg_data.pages_faults] |
||
974 | mov [ecx+8], eax |
||
975 | mov eax, [heap_size] |
||
976 | mov [ecx+12], eax |
||
977 | mov eax, [heap_free] |
||
978 | mov [ecx+16], eax |
||
170 | serge | 979 | mov eax, [heap_blocks] |
1072 | diamond | 980 | mov [ecx+20], eax |
981 | mov eax, [free_blocks] |
||
982 | mov [ecx+24], eax |
||
164 | serge | 983 | ret |
172 | serge | 984 | .fail: |
1072 | diamond | 985 | mov dword [esp+32], -1 |
172 | serge | 986 | ret |
164 | serge | 987 | |
988 | align 4 |
||
940 | serge | 989 | f68call: |
990 | dd f68.11 |
||
991 | dd f68.12 |
||
992 | dd f68.13 |
||
993 | dd f68.14 |
||
1077 | Galkov | 994 | dd f68.fail ;moved to f68.24 |
940 | serge | 995 | dd f68.16 |
996 | dd f68.17 |
||
1077 | Galkov | 997 | dd f68.fail ;moved to f68.25 |
940 | serge | 998 | dd f68.19 |
999 | dd f68.20 |
||
1000 | dd f68.21 |
||
1001 | dd f68.22 |
||
943 | serge | 1002 | dd f68.23 |
1077 | Galkov | 1003 | dd f68.24 |
1004 | dd f68.25 |
||
164 | serge | 1005 | |
940 | serge | 1006 | align 4 |
1007 | f68: |
||
164 | serge | 1008 | cmp eax,4 |
1009 | jle sys_sheduler |
||
1010 | |||
170 | serge | 1011 | cmp eax, 11 |
164 | serge | 1012 | jb .fail |
1013 | |||
1077 | Galkov | 1014 | cmp eax, 25 |
940 | serge | 1015 | ja .fail |
1016 | |||
1017 | jmp dword [f68call+eax*4-11*4] |
||
1018 | .11: |
||
188 | serge | 1019 | call init_heap |
164 | serge | 1020 | mov [esp+36], eax |
1021 | ret |
||
940 | serge | 1022 | .12: |
164 | serge | 1023 | stdcall user_alloc, ebx |
1024 | mov [esp+36], eax |
||
1025 | ret |
||
940 | serge | 1026 | .13: |
164 | serge | 1027 | stdcall user_free, ebx |
1028 | mov [esp+36], eax |
||
1029 | ret |
||
940 | serge | 1030 | .14: |
465 | serge | 1031 | cmp ebx, OS_BASE |
1032 | jae .fail |
||
1055 | Galkov | 1033 | mov edi,ebx |
1034 | call get_event_ex |
||
227 | serge | 1035 | mov [esp+36], eax |
164 | serge | 1036 | ret |
1077 | Galkov | 1037 | .24: |
1074 | Galkov | 1038 | mov eax, [current_slot] |
1039 | xchg ebx, [eax+APPDATA.exc_handler] |
||
1040 | xchg ecx, [eax+APPDATA.except_mask] |
||
1041 | mov [esp+36], ebx ; reg_eax+8 |
||
1042 | mov [esp+24], ecx ; reg_ebx+8 |
||
164 | serge | 1043 | ret |
940 | serge | 1044 | .16: |
188 | serge | 1045 | test ebx, ebx |
1046 | jz .fail |
||
465 | serge | 1047 | cmp ebx, OS_BASE |
1048 | jae .fail |
||
164 | serge | 1049 | stdcall get_service, ebx |
1050 | mov [esp+36], eax |
||
1051 | ret |
||
940 | serge | 1052 | .17: |
378 | serge | 1053 | call srv_handlerEx ;ebx |
164 | serge | 1054 | mov [esp+36], eax |
1055 | ret |
||
1077 | Galkov | 1056 | .25: |
1081 | diamond | 1057 | cmp ebx,32 |
1058 | jae .fail |
||
1074 | Galkov | 1059 | mov eax, [current_slot] |
1060 | btr [eax+APPDATA.except_mask],ebx |
||
1061 | setc byte[esp+36] |
||
1062 | jecxz @f |
||
1063 | bts [eax+APPDATA.except_mask],ebx |
||
1064 | @@: ret |
||
940 | serge | 1065 | .19: |
465 | serge | 1066 | cmp ebx, OS_BASE |
1067 | jae .fail |
||
198 | serge | 1068 | stdcall load_library, ebx |
1069 | mov [esp+36], eax |
||
1070 | ret |
||
940 | serge | 1071 | .20: |
490 | serge | 1072 | mov eax, ecx |
1073 | call user_realloc |
||
1074 | mov [esp+36], eax |
||
1075 | ret |
||
940 | serge | 1076 | .21: |
740 | serge | 1077 | cmp ebx, OS_BASE |
1078 | jae .fail |
||
1079 | |||
1080 | stdcall load_PE, ebx |
||
1081 | |||
1082 | test eax, eax |
||
1083 | jz @F |
||
1084 | |||
1085 | mov esi, eax |
||
1086 | stdcall eax, DRV_ENTRY |
||
1087 | |||
1088 | test eax, eax |
||
1089 | jz @F |
||
1090 | |||
1091 | mov [eax+SRV.entry], esi |
||
1092 | |||
1093 | @@: |
||
1094 | mov [esp+36], eax |
||
1095 | ret |
||
940 | serge | 1096 | .22: |
1097 | cmp ebx, OS_BASE |
||
1098 | jae .fail |
||
740 | serge | 1099 | |
940 | serge | 1100 | stdcall shmem_open, ebx, ecx, edx |
1101 | mov [esp+28], edx |
||
1102 | mov [esp+36], eax |
||
1103 | ret |
||
740 | serge | 1104 | |
943 | serge | 1105 | .23: |
1106 | cmp ebx, OS_BASE |
||
1107 | jae .fail |
||
1108 | |||
1109 | stdcall shmem_close, ebx |
||
1110 | mov [esp+36], eax |
||
1111 | ret |
||
1112 | |||
164 | serge | 1113 | .fail: |
1114 | xor eax, eax |
||
1115 | mov [esp+36], eax |
||
1116 | ret |
||
1117 | |||
1118 | align 4 |
||
819 | serge | 1119 | proc load_pe_driver stdcall, file:dword |
1120 | |||
1121 | stdcall load_PE, [file] |
||
1122 | test eax, eax |
||
1123 | jz .fail |
||
1124 | |||
1125 | mov esi, eax |
||
1126 | stdcall eax, DRV_ENTRY |
||
1127 | test eax, eax |
||
1128 | jz .fail |
||
1129 | |||
1130 | mov [eax+SRV.entry], esi |
||
1131 | ret |
||
1132 | |||
1133 | .fail: |
||
1134 | xor eax, eax |
||
1135 | ret |
||
1136 | endp |
||
1137 | |||
1138 | |||
1139 | align 4 |
||
164 | serge | 1140 | proc init_mtrr |
1141 | |||
412 | serge | 1142 | cmp [BOOT_VAR+0x901c],byte 2 |
164 | serge | 1143 | je .exit |
1144 | |||
211 | serge | 1145 | bt [cpu_caps], CAPS_MTRR |
1146 | jnc .exit |
||
1147 | |||
164 | serge | 1148 | mov eax, cr0 |
1149 | or eax, 0x60000000 ;disable caching |
||
1150 | mov cr0, eax |
||
1151 | wbinvd ;invalidate cache |
||
1152 | |||
1153 | mov ecx, 0x2FF |
||
1154 | rdmsr ; |
||
1030 | diamond | 1155 | ; has BIOS already initialized MTRRs? |
1156 | test ah, 8 |
||
1157 | jnz .skip_init |
||
1158 | ; rarely needed, so mainly placeholder |
||
1159 | ; main memory - cached |
||
164 | serge | 1160 | push eax |
1161 | |||
821 | diamond | 1162 | mov eax, [MEM_AMOUNT] |
1163 | ; round eax up to next power of 2 |
||
1164 | dec eax |
||
1165 | bsr ecx, eax |
||
1030 | diamond | 1166 | mov ebx, 2 |
1167 | shl ebx, cl |
||
1168 | dec ebx |
||
1169 | ; base of memory range = 0, type of memory range = MEM_WB |
||
164 | serge | 1170 | xor edx, edx |
1030 | diamond | 1171 | mov eax, MEM_WB |
1172 | mov ecx, 0x200 |
||
1173 | wrmsr |
||
1174 | ; mask of memory range = 0xFFFFFFFFF - (size - 1), ebx = size - 1 |
||
1175 | mov eax, 0xFFFFFFFF |
||
1176 | mov edx, 0x0000000F |
||
1177 | sub eax, ebx |
||
1178 | sbb edx, 0 |
||
1179 | or eax, 0x800 |
||
1180 | inc ecx |
||
1181 | wrmsr |
||
1182 | ; clear unused MTRRs |
||
164 | serge | 1183 | xor eax, eax |
1030 | diamond | 1184 | xor edx, edx |
164 | serge | 1185 | @@: |
1030 | diamond | 1186 | wrmsr |
164 | serge | 1187 | inc ecx |
1030 | diamond | 1188 | cmp ecx, 0x210 |
1189 | jb @b |
||
1190 | ; enable MTRRs |
||
1191 | pop eax |
||
1192 | or ah, 8 |
||
1193 | and al, 0xF0 ; default memtype = UC |
||
1194 | mov ecx, 0x2FF |
||
164 | serge | 1195 | wrmsr |
1030 | diamond | 1196 | .skip_init: |
1197 | stdcall set_mtrr, [LFBAddress],[LFBSize],MEM_WC |
||
164 | serge | 1198 | |
1199 | wbinvd ;again invalidate |
||
1200 | |||
1201 | mov eax, cr0 |
||
1202 | and eax, not 0x60000000 |
||
1203 | mov cr0, eax ; enable caching |
||
1204 | .exit: |
||
1205 | ret |
||
1206 | endp |
||
1207 | |||
1208 | align 4 |
||
1030 | diamond | 1209 | proc set_mtrr stdcall, base:dword,size:dword,mem_type:dword |
1210 | ; find unused register |
||
1211 | mov ecx, 0x201 |
||
1212 | @@: |
||
1213 | rdmsr |
||
1214 | dec ecx |
||
1215 | test ah, 8 |
||
1216 | jz .found |
||
1217 | rdmsr |
||
1218 | mov al, 0 ; clear memory type field |
||
1219 | cmp eax, [base] |
||
1220 | jz .ret |
||
1221 | add ecx, 3 |
||
1222 | cmp ecx, 0x210 |
||
1223 | jb @b |
||
1224 | ; no free registers, ignore the call |
||
1225 | .ret: |
||
1226 | ret |
||
1227 | .found: |
||
1228 | ; found, write values |
||
164 | serge | 1229 | xor edx, edx |
1230 | mov eax, [base] |
||
1231 | or eax, [mem_type] |
||
1232 | wrmsr |
||
1233 | |||
1234 | mov ebx, [size] |
||
1235 | dec ebx |
||
1236 | mov eax, 0xFFFFFFFF |
||
1237 | mov edx, 0x0000000F |
||
1238 | sub eax, ebx |
||
1239 | sbb edx, 0 |
||
1240 | or eax, 0x800 |
||
1241 | inc ecx |
||
1242 | wrmsr |
||
1243 | ret |
||
1244 | endp |
||
1245 | |||
465 | serge | 1246 | align 4 |
172 | serge | 1247 | proc stall stdcall, delay:dword |
1248 | push ecx |
||
1249 | push edx |
||
1250 | push ebx |
||
1251 | push eax |
||
1252 | |||
1253 | mov eax, [delay] |
||
1254 | mul [stall_mcs] |
||
1255 | mov ebx, eax ;low |
||
1256 | mov ecx, edx ;high |
||
1257 | rdtsc |
||
1258 | add ebx, eax |
||
1259 | adc ecx,edx |
||
1260 | @@: |
||
1261 | rdtsc |
||
1262 | sub eax, ebx |
||
1263 | sbb edx, ecx |
||
1264 | jb @B |
||
1265 | |||
1266 | pop eax |
||
1267 | pop ebx |
||
1268 | pop edx |
||
1269 | pop ecx |
||
1270 | ret |
||
1271 | endp |
||
1272 | |||
520 | serge | 1273 | align 4 |
1274 | proc create_ring_buffer stdcall, size:dword, flags:dword |
||
1275 | locals |
||
1276 | buf_ptr dd ? |
||
1277 | endl |
||
237 | serge | 1278 | |
520 | serge | 1279 | mov eax, [size] |
1280 | test eax, eax |
||
1281 | jz .fail |
||
1282 | |||
1283 | add eax, eax |
||
1284 | stdcall alloc_kernel_space, eax |
||
1285 | test eax, eax |
||
1286 | jz .fail |
||
1287 | |||
662 | serge | 1288 | push ebx |
1289 | |||
520 | serge | 1290 | mov [buf_ptr], eax |
1291 | |||
1292 | mov ebx, [size] |
||
1293 | shr ebx, 12 |
||
1294 | push ebx |
||
1295 | |||
1296 | stdcall alloc_pages, ebx |
||
1297 | pop ecx |
||
1298 | |||
1299 | test eax, eax |
||
1300 | jz .mm_fail |
||
1301 | |||
662 | serge | 1302 | push edi |
1303 | |||
520 | serge | 1304 | or eax, [flags] |
1305 | mov edi, [buf_ptr] |
||
1306 | mov ebx, [buf_ptr] |
||
1307 | mov edx, ecx |
||
566 | serge | 1308 | shl edx, 2 |
520 | serge | 1309 | shr edi, 10 |
1310 | @@: |
||
1311 | mov [page_tabs+edi], eax |
||
1312 | mov [page_tabs+edi+edx], eax |
||
924 | serge | 1313 | invlpg [ebx] |
1314 | invlpg [ebx+0x10000] |
||
520 | serge | 1315 | add eax, 0x1000 |
1316 | add ebx, 0x1000 |
||
566 | serge | 1317 | add edi, 4 |
520 | serge | 1318 | dec ecx |
1319 | jnz @B |
||
1320 | |||
1321 | mov eax, [buf_ptr] |
||
662 | serge | 1322 | pop edi |
1323 | pop ebx |
||
520 | serge | 1324 | ret |
1325 | .mm_fail: |
||
1326 | stdcall free_kernel_space, [buf_ptr] |
||
1327 | xor eax, eax |
||
662 | serge | 1328 | pop ebx |
520 | serge | 1329 | .fail: |
1330 | ret |
||
1331 | endp0>> |