projects / mirror_edk2.git / blame
| Commit | Line | Data |
|---|---|---|
| 656419f9 RC |
1 | ;------------------------------------------------------------------------------\r |
| 2 | ; @file\r | |
| 3 | ; A minimal Int10h stub that allows the Windows 2008 R2 SP1 UEFI guest's buggy,\r | |
| 4 | ; default VGA driver to switch to 1024x768x32.\r | |
| 5 | ;\r | |
| 6 | ; Copyright (C) 2020, Rebecca Cran <rebecca@bsdio.com>\r | |
| 7 | ; Copyright (C) 2015, Nahanni Systems, Inc.\r | |
| 8 | ; Copyright (C) 2014, Red Hat, Inc.\r | |
| 9 | ; Copyright (c) 2013 - 2014, Intel Corporation. All rights reserved.<BR>\r | |
| 10 | ;\r | |
| 11 | ; SPDX-License-Identifier: BSD-2-Clause-Patent\r | |
| 12 | ;\r | |
| 13 | ;------------------------------------------------------------------------------\r | |
| 14 | \r | |
| 15 | ; enable this macro for debug messages\r | |
| 16 | %define DEBUG\r | |
| 17 | \r | |
| 18 | %macro DebugLog 1\r | |
| 19 | %ifdef DEBUG\r | |
| 20 | push si\r | |
| 21 | mov si, %1\r | |
| 22 | call PrintStringSi\r | |
| 23 | pop si\r | |
| 24 | %endif\r | |
| 25 | %endmacro\r | |
| 26 | \r | |
| 27 | \r | |
| 28 | BITS 16\r | |
| 29 | ORG 0\r | |
| 30 | \r | |
| 31 | VbeInfo:\r | |
| 32 | TIMES 256 nop\r | |
| 33 | \r | |
| 34 | VbeModeInfo:\r | |
| 35 | VbeMode1:\r | |
| 36 | TIMES 50 nop\r | |
| 37 | VbeMode2:\r | |
| 38 | TIMES 50 nop\r | |
| 39 | VbeMode3:\r | |
| 40 | TIMES 50 nop\r | |
| 41 | VbeMode4:\r | |
| 42 | TIMES 50 nop\r | |
| 43 | TIMES 56 nop ; filler for 256 bytes\r | |
| 44 | \r | |
| 45 | Handler:\r | |
| 46 | cmp ax, 0x4f00\r | |
| 47 | je GetInfo\r | |
| 48 | cmp ax, 0x4f01\r | |
| 49 | je GetModeInfo\r | |
| 50 | cmp ax, 0x4f02\r | |
| 51 | je SetMode\r | |
| 52 | cmp ax, 0x4f03\r | |
| 53 | je GetMode\r | |
| 54 | cmp ax, 0x4f10\r | |
| 55 | je GetPmCapabilities\r | |
| 56 | cmp ax, 0x4f15\r | |
| 57 | je ReadEdid\r | |
| 58 | cmp ah, 0x00\r | |
| 59 | je SetModeLegacy\r | |
| 60 | DebugLog StrUnkownFunction\r | |
| 61 | Hang:\r | |
| 62 | jmp Hang\r | |
| 63 | \r | |
| 64 | \r | |
| 65 | GetInfo:\r | |
| 66 | push es\r | |
| 67 | push di\r | |
| 68 | push ds\r | |
| 69 | push si\r | |
| 70 | push cx\r | |
| 71 | \r | |
| 72 | DebugLog StrEnterGetInfo\r | |
| 73 | \r | |
| 74 | ; target (es:di) set on input\r | |
| 75 | push cs\r | |
| 76 | pop ds\r | |
| 77 | mov si, VbeInfo\r | |
| 78 | ; source (ds:si) set now\r | |
| 79 | \r | |
| 80 | mov cx, 256\r | |
| 81 | cld\r | |
| 82 | rep movsb\r | |
| 83 | \r | |
| 84 | pop cx\r | |
| 85 | pop si\r | |
| 86 | pop ds\r | |
| 87 | pop di\r | |
| 88 | pop es\r | |
| 89 | jmp Success\r | |
| 90 | \r | |
| 91 | \r | |
| 92 | GetModeInfo:\r | |
| 93 | push es\r | |
| 94 | push di\r | |
| 95 | push ds\r | |
| 96 | push si\r | |
| 97 | push cx\r | |
| 98 | \r | |
| 99 | DebugLog StrEnterGetModeInfo\r | |
| 100 | \r | |
| 101 | and cx, ~0x4000 ; clear potentially set LFB bit in mode number\r | |
| 102 | \r | |
| 103 | cmp cx, 0x013f\r | |
| 104 | je gKnownMode1\r | |
| 105 | cmp cx, 0x0140\r | |
| 106 | je gKnownMode2\r | |
| 107 | cmp cx, 0x0141\r | |
| 108 | je gKnownMode3\r | |
| 109 | \r | |
| 110 | DebugLog StrUnkownMode\r | |
| 111 | jmp Hang\r | |
| 112 | gKnownMode1:\r | |
| 113 | DebugLog StrMode1\r | |
| 114 | mov si, VbeMode1\r | |
| 115 | jmp CopyModeInfo\r | |
| 116 | gKnownMode2:\r | |
| 117 | DebugLog StrMode2\r | |
| 118 | mov si, VbeMode2\r | |
| 119 | jmp CopyModeInfo\r | |
| 120 | gKnownMode3:\r | |
| 121 | DebugLog StrMode3\r | |
| 122 | mov si, VbeMode3\r | |
| 123 | jmp CopyModeInfo\r | |
| 124 | gKnownMode4:\r | |
| 125 | DebugLog StrMode4\r | |
| 126 | mov si, VbeMode4\r | |
| 127 | jmp CopyModeInfo\r | |
| 128 | \r | |
| 129 | CopyModeInfo:\r | |
| 130 | ; target (es:di) set on input\r | |
| 131 | push cs\r | |
| 132 | pop ds\r | |
| 133 | ;mov si, VbeModeInfo\r | |
| 134 | ; source (ds:si) set now\r | |
| 135 | \r | |
| 136 | ;mov cx, 256\r | |
| 137 | mov cx, 50\r | |
| 138 | cld\r | |
| 139 | rep movsb\r | |
| 140 | \r | |
| 141 | pop cx\r | |
| 142 | pop si\r | |
| 143 | pop ds\r | |
| 144 | pop di\r | |
| 145 | pop es\r | |
| 146 | jmp Success\r | |
| 147 | \r | |
| 148 | \r | |
| 149 | SetMode:\r | |
| 150 | push dx\r | |
| 151 | push ax\r | |
| 152 | \r | |
| 153 | DebugLog StrEnterSetMode\r | |
| 154 | \r | |
| 155 | and bx, ~0x4000 ; clear potentially set LFB bit in mode number\r | |
| 156 | cmp bx, 0x013f\r | |
| 157 | je KnownMode1\r | |
| 158 | cmp bx, 0x0140\r | |
| 159 | je KnownMode2\r | |
| 160 | cmp bx, 0x0141\r | |
| 161 | je KnownMode3\r | |
| 162 | DebugLog StrUnkownMode\r | |
| 163 | jmp Hang\r | |
| 164 | KnownMode1:\r | |
| 165 | DebugLog StrMode1\r | |
| 166 | jmp SetModeDone\r | |
| 167 | KnownMode2:\r | |
| 168 | DebugLog StrMode2\r | |
| 169 | jmp SetModeDone\r | |
| 170 | KnownMode3:\r | |
| 171 | DebugLog StrMode3\r | |
| 172 | jmp SetModeDone\r | |
| 173 | KnownMode4:\r | |
| 174 | DebugLog StrMode4\r | |
| 175 | \r | |
| 176 | SetModeDone:\r | |
| 177 | mov [CurMode], bl\r | |
| 178 | mov [CurMode+1], bh\r | |
| 179 | pop ax\r | |
| 180 | pop dx\r | |
| 181 | jmp Success\r | |
| 182 | \r | |
| 183 | \r | |
| 184 | GetMode:\r | |
| 185 | DebugLog StrEnterGetMode\r | |
| 186 | mov bl, [CurMode]\r | |
| 187 | mov bh, [CurMode+1]\r | |
| 188 | jmp Success\r | |
| 189 | \r | |
| 190 | \r | |
| 191 | GetPmCapabilities:\r | |
| 192 | DebugLog StrGetPmCapabilities\r | |
| 193 | mov bx, 0x0080\r | |
| 194 | jmp Success\r | |
| 195 | \r | |
| 196 | \r | |
| 197 | ReadEdid:\r | |
| 198 | push es\r | |
| 199 | push di\r | |
| 200 | push ds\r | |
| 201 | push si\r | |
| 202 | push cx\r | |
| 203 | \r | |
| 204 | DebugLog StrReadEdid\r | |
| 205 | \r | |
| 206 | ; target (es:di) set on input\r | |
| 207 | push cs\r | |
| 208 | pop ds\r | |
| 209 | mov si, Edid\r | |
| 210 | ; source (ds:si) set now\r | |
| 211 | \r | |
| 212 | mov cx, 128\r | |
| 213 | cld\r | |
| 214 | rep movsb\r | |
| 215 | \r | |
| 216 | pop cx\r | |
| 217 | pop si\r | |
| 218 | pop ds\r | |
| 219 | pop di\r | |
| 220 | pop es\r | |
| 221 | jmp Success\r | |
| 222 | \r | |
| 223 | \r | |
| 224 | SetModeLegacy:\r | |
| 225 | DebugLog StrEnterSetModeLegacy\r | |
| 226 | \r | |
| 227 | cmp al, 0x03\r | |
| 228 | je sKnownMode3\r | |
| 229 | cmp al, 0x12\r | |
| 230 | je sKnownMode4\r | |
| 231 | DebugLog StrUnkownMode\r | |
| 232 | jmp Hang\r | |
| 233 | sKnownMode3:\r | |
| 234 | DebugLog StrLegacyMode3\r | |
| 235 | mov al, 0 ; 0x30\r | |
| 236 | jmp SetModeLegacyDone\r | |
| 237 | sKnownMode4:\r | |
| 238 | mov al, 0 ;0x20\r | |
| 239 | SetModeLegacyDone:\r | |
| 240 | DebugLog StrExitSuccess\r | |
| 241 | iret\r | |
| 242 | \r | |
| 243 | \r | |
| 244 | Success:\r | |
| 245 | DebugLog StrExitSuccess\r | |
| 246 | mov ax, 0x004f\r | |
| 247 | iret\r | |
| 248 | \r | |
| 249 | \r | |
| 250 | Unsupported:\r | |
| 251 | DebugLog StrExitUnsupported\r | |
| 252 | mov ax, 0x024f\r | |
| 253 | iret\r | |
| 254 | \r | |
| 255 | \r | |
| 256 | %ifdef DEBUG\r | |
| 257 | PrintStringSi:\r | |
| 258 | pusha\r | |
| 259 | push ds ; save original\r | |
| 260 | push cs\r | |
| 261 | pop ds\r | |
| 262 | mov dx, 0x220 ; bhyve debug cons port\r | |
| 263 | mov ax, 0\r | |
| 264 | PrintStringSiLoop:\r | |
| 265 | lodsb\r | |
| 266 | cmp al, 0\r | |
| 267 | je PrintStringSiDone\r | |
| 268 | out dx, al\r | |
| 269 | jmp PrintStringSiLoop\r | |
| 270 | PrintStringSiDone:\r | |
| 271 | pop ds ; restore original\r | |
| 272 | popa\r | |
| 273 | ret\r | |
| 274 | \r | |
| 275 | \r | |
| 276 | StrExitSuccess:\r | |
| 277 | db 'vOk', 0x0d, 0x0a, 0\r | |
| 278 | \r | |
| 279 | StrExitUnsupported:\r | |
| 280 | db 'vUnsupported', 0x0d, 0x0a, 0\r | |
| 281 | \r | |
| 282 | StrUnkownFunction:\r | |
| 283 | db 'vUnknown Function', 0x0d, 0x0a, 0\r | |
| 284 | \r | |
| 285 | StrEnterGetInfo:\r | |
| 286 | db 'vGetInfo', 0x0d, 0x0a, 0\r | |
| 287 | \r | |
| 288 | StrEnterGetModeInfo:\r | |
| 289 | db 'vGetModeInfo', 0x0d, 0x0a, 0\r | |
| 290 | \r | |
| 291 | StrEnterGetMode:\r | |
| 292 | db 'vGetMode', 0x0d, 0x0a, 0\r | |
| 293 | \r | |
| 294 | StrEnterSetMode:\r | |
| 295 | db 'vSetMode', 0x0d, 0x0a, 0\r | |
| 296 | \r | |
| 297 | StrEnterSetModeLegacy:\r | |
| 298 | db 'vSetModeLegacy', 0x0d, 0x0a, 0\r | |
| 299 | \r | |
| 300 | StrUnkownMode:\r | |
| 301 | db 'vUnkown Mode', 0x0d, 0x0a, 0\r | |
| 302 | \r | |
| 303 | StrGetPmCapabilities:\r | |
| 304 | db 'vGetPmCapabilities', 0x0d, 0x0a, 0\r | |
| 305 | \r | |
| 306 | StrReadEdid:\r | |
| 307 | db 'vReadEdid', 0x0d, 0x0a, 0\r | |
| 308 | \r | |
| 309 | StrLegacyMode3:\r | |
| 310 | db 'vLegacyMode3', 0x0d, 0x0a, 0\r | |
| 311 | \r | |
| 312 | \r | |
| 313 | StrMode1:\r | |
| 314 | db 'mode_640x480x32', 0x0d, 0x0a, 0\r | |
| 315 | StrMode2:\r | |
| 316 | db 'mode_800x600x32', 0x0d, 0x0a, 0\r | |
| 317 | StrMode3:\r | |
| 318 | db 'mode_1024x768x32', 0x0d, 0x0a, 0\r | |
| 319 | StrMode4:\r | |
| 320 | db 'mode_unused', 0x0d, 0x0a, 0\r | |
| 321 | %endif\r | |
| 322 | \r | |
| 323 | CurMode:\r | |
| 324 | db 0x00, 0x00\r | |
| 325 | \r | |
| 326 | ;\r | |
| 327 | ; EDID stores monitor information. For now, just send back an null item.\r | |
| 328 | ;\r | |
| 329 | Edid:\r | |
| 330 | db 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00\r | |
| 331 | db 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00\r | |
| 332 | db 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00\r | |
| 333 | db 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00\r | |
| 334 | db 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00\r | |
| 335 | db 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00\r | |
| 336 | db 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00\r | |
| 337 | db 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00\r | |
| 338 | db 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00\r | |
| 339 | db 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00\r | |
| 340 | db 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00\r | |
| 341 | db 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00\r | |
| 342 | db 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00\r |