projects / mirror_edk2.git / blame
| Commit | Line | Data |
|---|---|---|
| f3eb2131 | 1 | #------------------------------------------------------------------------------\r |
| 2 | #*\r | |
| b1f700a8 HT |
3 | #* Copyright (c) 2006 - 2007, Intel Corporation. All rights reserved.<BR>\r |
| 4 | #* This program and the accompanying materials \r | |
| f3eb2131 | 5 | #* are licensed and made available under the terms and conditions of the BSD License \r |
| 6 | #* which accompanies this distribution. The full text of the license may be found at \r | |
| 7 | #* http://opensource.org/licenses/bsd-license.php \r | |
| 8 | #* \r | |
| 9 | #* THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r | |
| 10 | #* WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r | |
| 11 | #* \r | |
| 12 | #* start64.asm\r | |
| 13 | #* \r | |
| 14 | #* Abstract:\r | |
| 15 | #*\r | |
| 16 | #------------------------------------------------------------------------------\r | |
| 17 | \r | |
| 18 | \r | |
| 19 | .stack: \r | |
| 20 | .486p: \r | |
| 21 | .code16\r | |
| 22 | \r | |
| ded312f1 | 23 | .equ FAT_DIRECTORY_ENTRY_SIZE, 0x020\r |
| 24 | .equ FAT_DIRECTORY_ENTRY_SHIFT, 5\r | |
| 25 | .equ BLOCK_SIZE, 0x0200\r | |
| 26 | .equ BLOCK_MASK, 0x01ff\r | |
| 27 | .equ BLOCK_SHIFT, 9\r | |
| f3eb2131 | 28 | \r |
| 29 | .org 0x0\r | |
| 30 | Ia32Jump: \r | |
| 31 | jmp BootSectorEntryPoint # JMP inst - 3 bytes\r | |
| 32 | nop\r | |
| 33 | \r | |
| 34 | OemId: .ascii "INTEL " # OemId - 8 bytes\r | |
| 35 | \r | |
| ded312f1 | 36 | SectorSize: .word 0 # Sector Size - 16 bits\r |
| 37 | SectorsPerCluster: .byte 0 # Sector Per Cluster - 8 bits\r | |
| 38 | ReservedSectors: .word 0 # Reserved Sectors - 16 bits\r | |
| 39 | NoFats: .byte 0 # Number of FATs - 8 bits\r | |
| 40 | RootEntries: .word 0 # Root Entries - 16 bits\r | |
| 41 | Sectors: .word 0 # Number of Sectors - 16 bits\r | |
| 42 | Media: .byte 0 # Media - 8 bits - ignored\r | |
| 43 | SectorsPerFat: .word 0 # Sectors Per FAT - 16 bits\r | |
| 44 | SectorsPerTrack: .word 0 # Sectors Per Track - 16 bits - ignored\r | |
| 45 | Heads: .word 0 # Heads - 16 bits - ignored\r | |
| 46 | HiddenSectors: .long 0 # Hidden Sectors - 32 bits - ignored\r | |
| 47 | LargeSectors: .long 0 # Large Sectors - 32 bits \r | |
| 48 | PhysicalDrive: .byte 0 # PhysicalDriveNumber - 8 bits - ignored\r | |
| 49 | CurrentHead: .byte 0 # Current Head - 8 bits\r | |
| 50 | Signature: .byte 0 # Signature - 8 bits - ignored\r | |
| 51 | VolId: .ascii " " # Volume Serial Number- 4 bytes\r | |
| 52 | FatLabel: .ascii " " # Label - 11 bytes\r | |
| f3eb2131 | 53 | SystemId: .ascii "FAT12 " # SystemId - 8 bytes\r |
| 54 | \r | |
| 55 | BootSectorEntryPoint: \r | |
| 56 | # ASSUME ds:@code"\r | |
| b29a823d | 57 | # ASSUME ss:@code"\r |
| f3eb2131 | 58 | # ds = 1000, es = 2000 + x (size of first cluster >> 4)\r |
| 59 | # cx = Start Cluster of EfiLdr\r | |
| 60 | # dx = Start Cluster of Efivar.bin\r | |
| 61 | \r | |
| 62 | # Re use the BPB data stored in Boot Sector\r | |
| 63 | movw $0x7c00,%bp\r | |
| 64 | \r | |
| 65 | pushw %cx\r | |
| 66 | # Read Efivar.bin\r | |
| 67 | # 1000:dx = DirectoryEntry of Efivar.bin -> BS.com has filled already\r | |
| 68 | movw $0x1900,%ax\r | |
| 69 | movw %ax,%es\r | |
| 70 | testw %dx,%dx\r | |
| 71 | jnz CheckVarStoreSize\r | |
| 72 | \r | |
| 73 | movb $1,%al\r | |
| 74 | NoVarStore: \r | |
| 75 | pushw %es\r | |
| 76 | # Set the 5th byte start @ 0:19000 to non-zero indicating we should init var store header in DxeIpl\r | |
| b29a823d | 77 | movb %al, %es:(4)\r |
| f3eb2131 | 78 | jmp SaveVolumeId\r |
| 79 | \r | |
| 80 | CheckVarStoreSize: \r | |
| 81 | movw %dx,%di\r | |
| 82 | cmpl $0x4000, %ds:2(%di)\r | |
| 83 | movb $2,%al\r | |
| 84 | jne NoVarStore\r | |
| 85 | \r | |
| 86 | LoadVarStore: \r | |
| 87 | movb $0,%al\r | |
| 88 | movb %al, %es:(4)\r | |
| b29a823d | 89 | movw (%di), %cx\r |
| f3eb2131 | 90 | # ES:DI = 1500:0\r |
| 91 | xorw %di,%di\r | |
| 92 | pushw %es\r | |
| 93 | movw $0x1500,%ax\r | |
| 94 | movw %ax,%es\r | |
| 95 | call ReadFile\r | |
| 96 | SaveVolumeId: \r | |
| 97 | popw %es\r | |
| 98 | movw VolId(%bp), %ax\r | |
| 99 | movw %ax, %es:(0) \r | |
| 100 | movw VolId+2(%bp), %ax\r | |
| b29a823d | 101 | movw %ax, %es:(2)\r |
| f3eb2131 | 102 | \r |
| 103 | # Read Efildr\r | |
| 104 | popw %cx\r | |
| 105 | # cx = Start Cluster of Efildr -> BS.com has filled already\r | |
| 106 | # ES:DI = 2000:0, first cluster will be read again\r | |
| 107 | xorw %di,%di # di = 0\r | |
| 108 | movw $0x2000,%ax\r | |
| 109 | movw %ax,%es\r | |
| 110 | call ReadFile\r | |
| 111 | movw %cs,%ax\r | |
| 112 | movw %ax, %cs:JumpSegment\r | |
| 113 | \r | |
| 114 | CheckEm64T: \r | |
| 115 | movl $0x80000001,%eax\r | |
| 116 | # cpuid\r | |
| 117 | .word 0xA20F\r | |
| 118 | btl $29,%edx\r | |
| 119 | jc CheckEm64TPass\r | |
| 120 | pushw %cs\r | |
| 121 | popw %ds\r | |
| 122 | leaw Em64String,%si\r | |
| 123 | movw $18,%cx\r | |
| 124 | jmp PrintStringAndHalt\r | |
| 125 | CheckEm64TPass: \r | |
| 126 | jumpFarInstruction: \r | |
| 127 | .byte 0xea\r | |
| 128 | jumpOffset: \r | |
| 129 | .word 0x200\r | |
| 130 | jumpSegment: \r | |
| 131 | .word 0x2000\r | |
| 132 | \r | |
| 133 | \r | |
| 134 | \r | |
| 135 | # ****************************************************************************\r | |
| 136 | # ReadFile\r | |
| 137 | #\r | |
| 138 | # Arguments:\r | |
| 139 | # CX = Start Cluster of File\r | |
| 140 | # ES:DI = Buffer to store file content read from disk\r | |
| 141 | #\r | |
| 142 | # Return:\r | |
| 143 | # (ES << 4 + DI) = end of file content Buffer\r | |
| 144 | #\r | |
| 145 | # ****************************************************************************\r | |
| 146 | ReadFile: \r | |
| 147 | # si = NumberOfClusters\r | |
| 148 | # cx = ClusterNumber\r | |
| 149 | # dx = CachedFatSectorNumber\r | |
| 150 | # ds:0000 = CacheFatSectorBuffer\r | |
| 151 | # es:di = Buffer to load file\r | |
| 152 | # bx = NextClusterNumber\r | |
| 153 | pusha\r | |
| 154 | movw $1,%si # NumberOfClusters = 1\r | |
| 155 | pushw %cx # Push Start Cluster onto stack\r | |
| 156 | movw $0xfff,%dx # CachedFatSectorNumber = 0xfff\r | |
| 157 | FatChainLoop: \r | |
| 158 | movw %cx,%ax # ax = ClusterNumber \r | |
| 159 | andw $0xff8,%ax # ax = ax & 0xff8\r | |
| 160 | cmpw $0xff8,%ax # See if this is the last cluster\r | |
| 161 | je FoundLastCluster # Jump if last cluster found\r | |
| 162 | movw %cx,%ax # ax = ClusterNumber\r | |
| 163 | shlw %ax # ax = ClusterNumber * 2\r | |
| 164 | addw %cx,%ax # ax = ClusterNumber * 2 + ClusterNumber = ClusterNumber * 3\r | |
| 165 | shrw %ax # FatOffset = ClusterNumber*3 / 2\r | |
| 166 | pushw %si # Save si\r | |
| 167 | movw %ax,%si # si = FatOffset\r | |
| 168 | shrw $BLOCK_SHIFT, %ax # ax = FatOffset >> BLOCK_SHIFT\r | |
| b29a823d | 169 | addw ReservedSectors(%bp), %ax # ax = FatSectorNumber = ReservedSectors + (FatOffset >> BLOCK_OFFSET)\r |
| f3eb2131 | 170 | andw $BLOCK_MASK, %si # si = FatOffset & BLOCK_MASK\r |
| 171 | cmpw %dx,%ax # Compare FatSectorNumber to CachedFatSectorNumber\r | |
| 172 | je SkipFatRead\r | |
| 173 | movw $2,%bx\r | |
| 174 | pushw %es\r | |
| 175 | pushw %ds\r | |
| 176 | popw %es\r | |
| 177 | call ReadBlocks # Read 2 blocks starting at AX storing at ES:DI\r | |
| 178 | popw %es\r | |
| 179 | movw %ax,%dx # CachedFatSectorNumber = FatSectorNumber\r | |
| 180 | SkipFatRead: \r | |
| b29a823d | 181 | movw (%si), %bx # bx = NextClusterNumber\r |
| f3eb2131 | 182 | movw %cx,%ax # ax = ClusterNumber\r |
| 183 | andw $1,%ax # See if this is an odd cluster number\r | |
| 184 | je EvenFatEntry\r | |
| 185 | shrw $4,%bx # NextClusterNumber = NextClusterNumber >> 4\r | |
| 186 | EvenFatEntry: \r | |
| 187 | andw $0xfff,%bx # Strip upper 4 bits of NextClusterNumber\r | |
| 188 | popw %si # Restore si\r | |
| 189 | decw %bx # bx = NextClusterNumber - 1\r | |
| 190 | cmpw %cx,%bx # See if (NextClusterNumber-1)==ClusterNumber\r | |
| 191 | jne ReadClusters\r | |
| 192 | incw %bx # bx = NextClusterNumber\r | |
| 193 | incw %si # NumberOfClusters++\r | |
| 194 | movw %bx,%cx # ClusterNumber = NextClusterNumber\r | |
| 195 | jmp FatChainLoop\r | |
| 196 | ReadClusters: \r | |
| 197 | incw %bx\r | |
| 198 | popw %ax # ax = StartCluster\r | |
| 199 | pushw %bx # StartCluster = NextClusterNumber\r | |
| 200 | movw %bx,%cx # ClusterNumber = NextClusterNumber\r | |
| 201 | subw $2,%ax # ax = StartCluster - 2\r | |
| 202 | xorb %bh,%bh\r | |
| b29a823d | 203 | movb SectorsPerCluster(%bp), %bl # bx = SectorsPerCluster\r |
| f3eb2131 | 204 | mulw %bx # ax = (StartCluster - 2) * SectorsPerCluster\r |
| b29a823d | 205 | addw (%bp), %ax # ax = FirstClusterLBA + (StartCluster-2)*SectorsPerCluster\r |
| f3eb2131 | 206 | pushw %ax # save start sector\r |
| 207 | movw %si,%ax # ax = NumberOfClusters\r | |
| 208 | mulw %bx # ax = NumberOfClusters * SectorsPerCluster\r | |
| 209 | movw %ax,%bx # bx = Number of Sectors\r | |
| 210 | popw %ax # ax = Start Sector\r | |
| 211 | call ReadBlocks\r | |
| 212 | movw $1,%si # NumberOfClusters = 1\r | |
| 213 | jmp FatChainLoop\r | |
| 214 | FoundLastCluster: \r | |
| 215 | popw %cx\r | |
| 216 | popa\r | |
| 217 | ret\r | |
| 218 | \r | |
| 219 | \r | |
| 220 | # ****************************************************************************\r | |
| 221 | # ReadBlocks - Reads a set of blocks from a block device\r | |
| 222 | #\r | |
| 223 | # AX = Start LBA\r | |
| 224 | # BX = Number of Blocks to Read\r | |
| 225 | # ES:DI = Buffer to store sectors read from disk\r | |
| 226 | # ****************************************************************************\r | |
| 227 | \r | |
| 228 | # cx = Blocks\r | |
| 229 | # bx = NumberOfBlocks\r | |
| 230 | # si = StartLBA\r | |
| 231 | \r | |
| 232 | ReadBlocks: \r | |
| 233 | pusha\r | |
| ded312f1 | 234 | addl LBAOffsetForBootSector(%bp), %eax # Add LBAOffsetForBootSector to Start LBA\r |
| f3eb2131 | 235 | addl HiddenSectors(%bp), %eax # Add HiddenSectors to Start LBA\r |
| 236 | movl %eax,%esi # esi = Start LBA\r | |
| 237 | movw %bx,%cx # cx = Number of blocks to read\r | |
| 238 | ReadCylinderLoop: \r | |
| 239 | movw $0x7bfc,%bp # bp = 0x7bfc\r | |
| 240 | movl %esi,%eax # eax = Start LBA\r | |
| 241 | xorl %edx,%edx # edx = 0\r | |
| 242 | movzwl (%bp), %ebx # bx = MaxSector\r | |
| 243 | divl %ebx # ax = StartLBA / MaxSector\r | |
| 244 | incw %dx # dx = (StartLBA % MaxSector) + 1\r | |
| 245 | \r | |
| b29a823d | 246 | movw (%bp), %bx # bx = MaxSector\r |
| f3eb2131 | 247 | subw %dx,%bx # bx = MaxSector - Sector\r |
| 248 | incw %bx # bx = MaxSector - Sector + 1\r | |
| 249 | cmpw %bx,%cx # Compare (Blocks) to (MaxSector - Sector + 1)\r | |
| 250 | jg LimitTransfer\r | |
| 251 | movw %cx,%bx # bx = Blocks\r | |
| 252 | LimitTransfer: \r | |
| 253 | pushw %ax # save ax\r | |
| 254 | movw %es,%ax # ax = es\r | |
| 255 | shrw $(BLOCK_SHIFT-4), %ax # ax = Number of blocks into mem system\r | |
| 256 | andw $0x7f,%ax # ax = Number of blocks into current seg\r | |
| 257 | addw %bx,%ax # ax = End Block number of transfer\r | |
| 258 | cmpw $0x80,%ax # See if it crosses a 64K boundry\r | |
| 259 | jle NotCrossing64KBoundry # Branch if not crossing 64K boundry\r | |
| 260 | subw $0x80,%ax # ax = Number of blocks past 64K boundry\r | |
| 261 | subw %ax,%bx # Decrease transfer size by block overage\r | |
| 262 | NotCrossing64KBoundry: \r | |
| 263 | popw %ax # restore ax\r | |
| 264 | \r | |
| 265 | pushw %cx\r | |
| 266 | movb %dl,%cl # cl = (StartLBA % MaxSector) + 1 = Sector\r | |
| 267 | xorw %dx,%dx # dx = 0\r | |
| 268 | divw 2(%bp) # ax = ax / (MaxHead + 1) = Cylinder \r | |
| 269 | # dx = ax % (MaxHead + 1) = Head\r | |
| 270 | \r | |
| 271 | pushw %bx # Save number of blocks to transfer\r | |
| 272 | movb %dl,%dh # dh = Head\r | |
| 273 | movw $0x7c00,%bp # bp = 0x7c00\r | |
| 274 | movb PhysicalDrive(%bp), %dl # dl = Drive Number\r | |
| 275 | movb %al,%ch # ch = Cylinder\r | |
| 276 | movb %bl,%al # al = Blocks\r | |
| 277 | movb $2,%ah # ah = Function 2\r | |
| 278 | movw %di,%bx # es:bx = Buffer address\r | |
| 279 | int $0x13\r | |
| 280 | jc DiskError\r | |
| 281 | popw %bx\r | |
| 282 | popw %cx\r | |
| 283 | movzwl %bx,%ebx\r | |
| 284 | addl %ebx,%esi # StartLBA = StartLBA + NumberOfBlocks\r | |
| 285 | subw %bx,%cx # Blocks = Blocks - NumberOfBlocks\r | |
| 286 | movw %es,%ax\r | |
| 287 | shlw $(BLOCK_SHIFT-4), %bx\r | |
| 288 | addw %bx,%ax\r | |
| 289 | movw %ax,%es # es:di = es:di + NumberOfBlocks*BLOCK_SIZE\r | |
| 290 | cmpw $0,%cx\r | |
| 291 | jne ReadCylinderLoop\r | |
| 292 | popa\r | |
| 293 | ret\r | |
| 294 | \r | |
| 295 | DiskError: \r | |
| 296 | pushw %cs\r | |
| 297 | popw %ds\r | |
| 298 | leaw ErrorString,%si\r | |
| 299 | movw $7,%cx\r | |
| 300 | jmp PrintStringAndHalt\r | |
| 301 | \r | |
| 302 | PrintStringAndHalt: \r | |
| 303 | movw $0xb800,%ax\r | |
| 304 | movw %ax,%es\r | |
| 305 | movw $160,%di\r | |
| 306 | rep \r | |
| 307 | movsw \r | |
| 308 | Halt: \r | |
| 309 | jmp Halt\r | |
| 310 | \r | |
| ded312f1 | 311 | ErrorString: \r |
| f3eb2131 | 312 | .byte 'S', 0x0c, 'E', 0x0c, 'r', 0x0c, 'r', 0x0c, 'o', 0x0c, 'r', 0x0c, '!',0x0c\r |
| 313 | \r | |
| b29a823d | 314 | .org 0x01fa\r |
| f3eb2131 | 315 | LBAOffsetForBootSector: \r |
| 316 | .long 0x0\r | |
| 317 | \r | |
| b29a823d | 318 | .org 0x01fe\r |
| f3eb2131 | 319 | .word 0xaa55\r |
| 320 | \r | |
| 321 | #******************************************************************************\r | |
| 322 | #******************************************************************************\r | |
| 323 | #******************************************************************************\r | |
| 324 | \r | |
| ded312f1 | 325 | .equ DELAY_PORT, 0x0ed # Port to use for 1uS delay\r |
| 326 | .equ KBD_CONTROL_PORT, 0x060 # 8042 control port \r | |
| 327 | .equ KBD_STATUS_PORT, 0x064 # 8042 status port \r | |
| 328 | .equ WRITE_DATA_PORT_CMD, 0x0d1 # 8042 command to write the data port\r | |
| f3eb2131 | 329 | .equ ENABLE_A20_CMD, 0x0df # 8042 command to enable A20\r |
| 330 | \r | |
| b29a823d | 331 | .org 0x200\r |
| f3eb2131 | 332 | jmp start\r |
| 333 | Em64String: \r | |
| 334 | .byte 'E', 0x0c, 'm', 0x0c, '6', 0x0c, '4', 0x0c, 'T', 0x0c, ' ', 0x0c, 'U', 0x0c, 'n', 0x0c, 's', 0x0c, 'u', 0x0c, 'p', 0x0c, 'p', 0x0c, 'o', 0x0c, 'r', 0x0c, 't', 0x0c, 'e', 0x0c, 'd', 0x0c, '!', 0x0c\r | |
| 335 | \r | |
| 336 | start: \r | |
| 337 | movw %cs,%ax\r | |
| 338 | movw %ax,%ds\r | |
| 339 | movw %ax,%es\r | |
| 340 | movw %ax,%ss\r | |
| 341 | movw $MyStack, %sp\r | |
| 342 | \r | |
| 343 | # mov ax,0b800h\r | |
| 344 | # mov es,ax\r | |
| 345 | # mov byte ptr es:[160],'a'\r | |
| 346 | # mov ax,cs\r | |
| 347 | # mov es,ax\r | |
| 348 | \r | |
| 349 | movl $0,%ebx\r | |
| 350 | leal MemoryMap, %edi\r | |
| 351 | MemMapLoop: \r | |
| 352 | movl $0xe820,%eax\r | |
| 353 | movl $20,%ecx\r | |
| 354 | movl $0x534d4150, %edx # SMAP\r | |
| 355 | int $0x15\r | |
| 356 | jc MemMapDone\r | |
| 357 | addl $20,%edi\r | |
| 358 | cmpl $0,%ebx\r | |
| 359 | je MemMapDone\r | |
| 360 | jmp MemMapLoop\r | |
| 361 | MemMapDone: \r | |
| 362 | leal MemoryMap, %eax\r | |
| 363 | subl %eax,%edi # Get the address of the memory map\r | |
| b29a823d | 364 | movl %edi, MemoryMapSize # Save the size of the memory map\r |
| f3eb2131 | 365 | \r |
| 366 | xorl %ebx,%ebx\r | |
| 367 | movw %cs,%bx # BX=segment\r | |
| 368 | shll $4,%ebx # BX="linear" address of segment base\r | |
| ded312f1 | 369 | leal GDT_BASE(%ebx), %eax # EAX=PHYSICAL address of gdt\r |
| 370 | movl %eax, (gdtr + 2) # Put address of gdt into the gdtr\r | |
| 371 | leal IDT_BASE(%ebx), %eax # EAX=PHYSICAL address of idt\r | |
| 372 | movl %eax, (idtr + 2) # Put address of idt into the idtr\r | |
| f3eb2131 | 373 | leal MemoryMapSize(%ebx), %edx # Physical base address of the memory map\r |
| 374 | \r | |
| 375 | # mov ax,0b800h\r | |
| 376 | # mov es,ax\r | |
| 377 | # mov byte ptr es:[162],'b'\r | |
| 378 | # mov ax,cs\r | |
| 379 | # mov es,ax\r | |
| 380 | \r | |
| 381 | #\r | |
| 382 | # Enable A20 Gate \r | |
| 383 | #\r | |
| 384 | \r | |
| 385 | movw $0x2401,%ax # Enable A20 Gate\r | |
| 386 | int $0x15\r | |
| 387 | jnc A20GateEnabled # Jump if it suceeded\r | |
| 388 | \r | |
| 389 | #\r | |
| 390 | # If INT 15 Function 2401 is not supported, then attempt to Enable A20 manually.\r | |
| 391 | #\r | |
| 392 | \r | |
| 393 | call Empty8042InputBuffer # Empty the Input Buffer on the 8042 controller\r | |
| 394 | jnz Timeout8042 # Jump if the 8042 timed out\r | |
| 395 | outw %ax, $DELAY_PORT # Delay 1 uS\r | |
| 396 | movb $WRITE_DATA_PORT_CMD, %al # 8042 cmd to write output port\r | |
| 397 | outb %al, $KBD_STATUS_PORT # Send command to the 8042\r | |
| 398 | call Empty8042InputBuffer # Empty the Input Buffer on the 8042 controller\r | |
| 399 | jnz Timeout8042 # Jump if the 8042 timed out\r | |
| 400 | movb $ENABLE_A20_CMD, %al # gate address bit 20 on\r | |
| 401 | outb %al, $KBD_CONTROL_PORT # Send command to thre 8042\r | |
| 402 | call Empty8042InputBuffer # Empty the Input Buffer on the 8042 controller\r | |
| 403 | movw $25,%cx # Delay 25 uS for the command to complete on the 8042\r | |
| 404 | Delay25uS: \r | |
| 405 | outw %ax, $DELAY_PORT # Delay 1 uS\r | |
| 406 | loop Delay25uS\r | |
| 407 | Timeout8042: \r | |
| 408 | \r | |
| 409 | \r | |
| 410 | A20GateEnabled: \r | |
| 411 | \r | |
| 412 | #\r | |
| 413 | # DISABLE INTERRUPTS - Entering Protected Mode\r | |
| 414 | #\r | |
| 415 | \r | |
| 416 | cli\r | |
| 417 | \r | |
| 418 | # mov ax,0b800h\r | |
| 419 | # mov es,ax\r | |
| 420 | # mov byte ptr es:[164],'c'\r | |
| 421 | # mov ax,cs\r | |
| 422 | # mov es,ax\r | |
| 423 | \r | |
| 424 | leal OffsetIn32BitProtectedMode, %eax\r | |
| 425 | addl $0x20000+0x6,%eax\r | |
| b29a823d | 426 | movl %eax, OffsetIn32BitProtectedMode \r |
| f3eb2131 | 427 | \r |
| 428 | leal OffsetInLongMode, %eax\r | |
| 429 | addl $0x20000+0x6,%eax\r | |
| 430 | movl %eax, OffsetInLongMode \r | |
| 431 | \r | |
| 432 | #\r | |
| 433 | # load GDT\r | |
| 434 | #\r | |
| 435 | .byte 0x66\r | |
| 436 | lgdt gdtr\r | |
| 437 | \r | |
| 438 | #\r | |
| 439 | # Enable Protect Mode (set CR0.PE=1)\r | |
| 440 | #\r | |
| 441 | movl %cr0, %eax # Read CR0.\r | |
| 442 | orl $0x1,%eax # Set PE=1\r | |
| 443 | movl %eax, %cr0 # Write CR0.\r | |
| 444 | .byte 0x66\r | |
| 445 | .byte 0xea # jmp far 16:32\r | |
| 446 | OffsetIn32BitProtectedMode: \r | |
| 447 | .long 0x0000000 # offset $+8 (In32BitProtectedMode)\r | |
| 448 | .word 0x10 # selector (flat CS)\r | |
| 449 | In32BitProtectedMode: \r | |
| 450 | \r | |
| 451 | #\r | |
| 452 | # Entering Long Mode\r | |
| 453 | #\r | |
| 454 | .byte 0x66\r | |
| 455 | movw $8,%ax\r | |
| 456 | movw %ax,%ds\r | |
| 457 | movw %ax,%es\r | |
| 458 | movw %ax,%ss\r | |
| 459 | \r | |
| 460 | #\r | |
| 461 | # Enable the 64-bit page-translation-table entries by\r | |
| 462 | # setting CR4.PAE=1 (this is _required_ before activating\r | |
| 463 | # long mode). Paging is not enabled until after long mode\r | |
| 464 | # is enabled.\r | |
| 465 | #\r | |
| 466 | .byte 0xf\r | |
| 467 | .byte 0x20\r | |
| 468 | .byte 0xe0\r | |
| 469 | # mov eax, cr4\r | |
| 470 | btsl $5,%eax\r | |
| 471 | .byte 0xf\r | |
| 472 | .byte 0x22\r | |
| 473 | .byte 0xe0\r | |
| 474 | # mov cr4, eax\r | |
| 475 | \r | |
| 476 | #\r | |
| 477 | # This is the Trapolean Page Tables that are guarenteed\r | |
| 478 | # under 4GB.\r | |
| 479 | #\r | |
| 480 | # Address Map:\r | |
| 481 | # 10000 ~ 12000 - efildr (loaded)\r | |
| 482 | # 20000 ~ 21000 - start64.com\r | |
| 483 | # 21000 ~ 22000 - efi64.com\r | |
| 484 | # 22000 ~ 90000 - efildr\r | |
| 485 | # 90000 ~ 96000 - 4G pagetable (will be reload later)\r | |
| 486 | #\r | |
| 487 | .byte 0xb8\r | |
| 488 | .long 0x90000\r | |
| 489 | # mov eax, 90000h\r | |
| 490 | movl %eax, %cr3\r | |
| 491 | \r | |
| 492 | #\r | |
| 493 | # Enable long mode (set EFER.LME=1).\r | |
| 494 | #\r | |
| 495 | .byte 0xb9\r | |
| 496 | .long 0xc0000080\r | |
| 497 | # mov ecx, 0c0000080h ; EFER MSR number.\r | |
| 498 | .byte 0xf\r | |
| 499 | .byte 0x32\r | |
| 500 | # rdmsr ; Read EFER.\r | |
| 501 | .byte 0xf\r | |
| 502 | .byte 0xba\r | |
| 503 | .byte 0xe8\r | |
| 504 | .byte 0x8\r | |
| 505 | # bts eax, 8 ; Set LME=1.\r | |
| 506 | .byte 0xf\r | |
| 507 | .byte 0x30\r | |
| 508 | # wrmsr ; Write EFER.\r | |
| 509 | \r | |
| 510 | #\r | |
| 511 | # Enable paging to activate long mode (set CR0.PG=1)\r | |
| 512 | #\r | |
| 513 | movl $cr0, %eax # Read CR0.\r | |
| 514 | .byte 0xf\r | |
| 515 | .byte 0xba\r | |
| 516 | .byte 0xe8\r | |
| 517 | .byte 0x1f\r | |
| 518 | # bts eax, 31 ; Set PG=1.\r | |
| 519 | movl %eax, %cr0 # Write CR0.\r | |
| 520 | jmp GoToLongMode\r | |
| 521 | GoToLongMode: \r | |
| 522 | \r | |
| 523 | .byte 0x67\r | |
| 524 | .byte 0xea # Far Jump $+9:Selector to reload CS\r | |
| 525 | OffsetInLongMode: \r | |
| 526 | .long 00000000 # $+9 Offset is ensuing instruction boundary\r | |
| 527 | .word 0x38 # Selector is our code selector, 38h\r | |
| 528 | \r | |
| 529 | InLongMode: \r | |
| 530 | .byte 0x66\r | |
| 531 | movw $0x30,%ax\r | |
| 532 | movw %ax,%ds\r | |
| 533 | \r | |
| 534 | .byte 0x66\r | |
| 535 | movw $0x18,%ax\r | |
| 536 | movw %ax,%es\r | |
| 537 | movw %ax,%ss\r | |
| 538 | movw %ax,%ds\r | |
| 539 | \r | |
| 540 | .byte 0xbd\r | |
| 541 | .long 0x400000\r | |
| 542 | # mov ebp,000400000h ; Destination of EFILDR32\r | |
| 543 | .byte 0xbb\r | |
| 544 | .long 0x70000\r | |
| 545 | # mov ebx,000070000h ; Length of copy\r | |
| 546 | \r | |
| 547 | #\r | |
| 548 | # load idt later\r | |
| 549 | #\r | |
| 550 | .byte 0x48\r | |
| 551 | .byte 0x33\r | |
| 552 | .byte 0xc0\r | |
| 553 | # xor rax, rax\r | |
| 554 | .byte 0x66\r | |
| 555 | movw $idtr, %ax\r | |
| 556 | .byte 0x48\r | |
| 557 | .byte 0x5\r | |
| 558 | .long 0x20000\r | |
| 559 | # add rax, 20000h\r | |
| 560 | \r | |
| 561 | .byte 0xf\r | |
| 562 | .byte 0x1\r | |
| 563 | .byte 0x18\r | |
| 564 | # lidt fword ptr [rax]\r | |
| 565 | \r | |
| 566 | .byte 0x48\r | |
| 567 | .byte 0xc7\r | |
| 568 | .byte 0xc0\r | |
| 569 | .long 0x21000\r | |
| 570 | # mov rax, 21000h\r | |
| 571 | .byte 0x50\r | |
| 572 | # push rax\r | |
| 573 | \r | |
| 574 | # ret\r | |
| 575 | .byte 0xc3\r | |
| 576 | \r | |
| 577 | Empty8042InputBuffer: \r | |
| 578 | movw $0,%cx\r | |
| 579 | Empty8042Loop: \r | |
| 580 | outw %ax, $DELAY_PORT # Delay 1us\r | |
| 581 | inb $KBD_STATUS_PORT, %al # Read the 8042 Status Port\r | |
| 582 | andb $0x2,%al # Check the Input Buffer Full Flag\r | |
| 583 | loopnz Empty8042Loop # Loop until the input buffer is empty or a timout of 65536 uS\r | |
| 584 | ret\r | |
| 585 | \r | |
| 586 | ##############################################################################\r | |
| 587 | # data\r | |
| 588 | ##############################################################################\r | |
| 589 | \r | |
| 9811c392 | 590 | .p2align 1\r |
| f3eb2131 | 591 | \r |
| b29a823d | 592 | gdtr: .long GDT_END - GDT_BASE - 1 # GDT limit \r |
| f3eb2131 | 593 | .long 0 # (GDT base gets set above)\r |
| 594 | ##############################################################################\r | |
| 595 | # global descriptor table (GDT)\r | |
| 596 | ##############################################################################\r | |
| 597 | \r | |
| 9811c392 | 598 | .p2align 1\r |
| f3eb2131 | 599 | \r |
| 600 | GDT_BASE: \r | |
| 601 | # null descriptor\r | |
| 602 | .equ NULL_SEL, .-GDT_BASE # Selector [0x0]\r | |
| 603 | .word 0 # limit 15:0\r | |
| 604 | .word 0 # base 15:0\r | |
| 605 | .byte 0 # base 23:16\r | |
| 606 | .byte 0 # type\r | |
| 607 | .byte 0 # limit 19:16, flags\r | |
| 608 | .byte 0 # base 31:24\r | |
| 609 | \r | |
| 610 | # linear data segment descriptor\r | |
| 611 | .equ LINEAR_SEL, .-GDT_BASE # Selector [0x8]\r | |
| 612 | .word 0xFFFF # limit 0xFFFFF\r | |
| 613 | .word 0 # base 0\r | |
| 614 | .byte 0\r | |
| 615 | .byte 0x92 # present, ring 0, data, expand-up, writable\r | |
| 616 | .byte 0xCF # page-granular, 32-bit\r | |
| 617 | .byte 0\r | |
| 618 | \r | |
| 619 | # linear code segment descriptor\r | |
| 620 | .equ LINEAR_CODE_SEL, .-GDT_BASE # Selector [0x10]\r | |
| 621 | .word 0xFFFF # limit 0xFFFFF\r | |
| 622 | .word 0 # base 0\r | |
| 623 | .byte 0\r | |
| 624 | .byte 0x9A # present, ring 0, data, expand-up, writable\r | |
| 625 | .byte 0xCF # page-granular, 32-bit\r | |
| 626 | .byte 0\r | |
| 627 | \r | |
| 628 | # system data segment descriptor\r | |
| 629 | .equ SYS_DATA_SEL, .-GDT_BASE # Selector [0x18]\r | |
| 630 | .word 0xFFFF # limit 0xFFFFF\r | |
| 631 | .word 0 # base 0\r | |
| 632 | .byte 0\r | |
| 633 | .byte 0x92 # present, ring 0, data, expand-up, writable\r | |
| 634 | .byte 0xCF # page-granular, 32-bit\r | |
| 635 | .byte 0\r | |
| 636 | \r | |
| 637 | # system code segment descriptor\r | |
| 638 | .equ SYS_CODE_SEL, .-GDT_BASE # Selector [0x20]\r | |
| 639 | .word 0xFFFF # limit 0xFFFFF\r | |
| 640 | .word 0 # base 0\r | |
| 641 | .byte 0\r | |
| 642 | .byte 0x9A # present, ring 0, data, expand-up, writable\r | |
| 643 | .byte 0xCF # page-granular, 32-bit\r | |
| 644 | .byte 0\r | |
| 645 | \r | |
| 646 | # spare segment descriptor\r | |
| 647 | .equ SPARE3_SEL, .-GDT_BASE # Selector [0x28]\r | |
| 648 | .word 0 # limit 0xFFFFF\r | |
| 649 | .word 0 # base 0\r | |
| 650 | .byte 0\r | |
| 651 | .byte 0 # present, ring 0, data, expand-up, writable\r | |
| 652 | .byte 0 # page-granular, 32-bit\r | |
| 653 | .byte 0\r | |
| 654 | \r | |
| 655 | #\r | |
| 656 | # system data segment descriptor\r | |
| 657 | #\r | |
| 658 | .equ SYS_DATA64_SEL, .-GDT_BASE # Selector [0x30]\r | |
| 659 | .word 0xFFFF # limit 0xFFFFF\r | |
| 660 | .word 0 # base 0\r | |
| 661 | .byte 0\r | |
| 662 | .byte 0x92 # P | DPL [1..2] | 1 | 1 | C | R | A\r | |
| 663 | .byte 0xCF # G | D | L | AVL | Segment [19..16]\r | |
| 664 | .byte 0\r | |
| 665 | \r | |
| 666 | #\r | |
| 667 | # system code segment descriptor\r | |
| 668 | #\r | |
| 669 | .equ SYS_CODE64_SEL, .-GDT_BASE # Selector [0x38]\r | |
| 670 | .word 0xFFFF # limit 0xFFFFF\r | |
| 671 | .word 0 # base 0\r | |
| 672 | .byte 0\r | |
| 673 | .byte 0x9A # P | DPL [1..2] | 1 | 1 | C | R | A\r | |
| 674 | .byte 0xAF # G | D | L | AVL | Segment [19..16]\r | |
| 675 | .byte 0\r | |
| 676 | \r | |
| 677 | # spare segment descriptor\r | |
| 678 | .equ SPARE4_SEL, .-GDT_BASE # Selector [0x40]\r | |
| 679 | .word 0 # limit 0xFFFFF\r | |
| 680 | .word 0 # base 0\r | |
| 681 | .byte 0\r | |
| 682 | .byte 0 # present, ring 0, data, expand-up, writable\r | |
| 683 | .byte 0 # page-granular, 32-bit\r | |
| 684 | .byte 0\r | |
| 685 | \r | |
| 686 | GDT_END: \r | |
| 687 | \r | |
| 9811c392 | 688 | .p2align 1\r |
| f3eb2131 | 689 | \r |
| 690 | \r | |
| 691 | \r | |
| 692 | idtr: .long IDT_END - IDT_BASE - 1 # IDT limit\r | |
| 693 | .quad 0 # (IDT base gets set above)\r | |
| 694 | \r | |
| 695 | ##############################################################################\r | |
| 696 | # interrupt descriptor table (IDT)\r | |
| 697 | #\r | |
| 698 | # Note: The hardware IRQ's specified in this table are the normal PC/AT IRQ\r | |
| 699 | # mappings. This implementation only uses the system timer and all other\r | |
| 700 | # IRQs will remain masked. The descriptors for vectors 33+ are provided\r | |
| 701 | # for convenience.\r | |
| 702 | ##############################################################################\r | |
| 703 | \r | |
| 704 | #idt_tag db "IDT",0 \r | |
| 9811c392 | 705 | .p2align 1\r |
| f3eb2131 | 706 | \r |
| 707 | \r | |
| 708 | IDT_BASE: \r | |
| 709 | # divide by zero (INT 0)\r | |
| 710 | .equ DIV_ZERO_SEL, .-IDT_BASE\r | |
| b29a823d | 711 | .word 0 # offset 15:0\r |
| f3eb2131 | 712 | .long SYS_CODE64_SEL # selector 15:0\r |
| 713 | .byte 0 # 0 for interrupt gate\r | |
| 714 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present\r | |
| b29a823d | 715 | .word 0 # offset 31:16\r |
| 716 | .long 0 # offset 63:32\r | |
| 717 | .long 0 # 0 for reserved\r | |
| f3eb2131 | 718 | \r |
| 719 | # debug exception (INT 1)\r | |
| 720 | .equ DEBUG_EXCEPT_SEL, .-IDT_BASE\r | |
| b29a823d | 721 | .word 0 # offset 15:0\r |
| f3eb2131 | 722 | .long SYS_CODE64_SEL # selector 15:0\r |
| 723 | .byte 0 # 0 for interrupt gate\r | |
| 724 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present\r | |
| b29a823d | 725 | .word 0 # offset 31:16\r |
| 726 | .long 0 # offset 63:32\r | |
| 727 | .long 0 # 0 for reserved\r | |
| f3eb2131 | 728 | \r |
| 729 | # NMI (INT 2)\r | |
| 730 | .equ NMI_SEL, .-IDT_BASE\r | |
| b29a823d | 731 | .word 0 # offset 15:0\r |
| f3eb2131 | 732 | .long SYS_CODE64_SEL # selector 15:0\r |
| 733 | .byte 0 # 0 for interrupt gate\r | |
| 734 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present\r | |
| b29a823d | 735 | .word 0 # offset 31:16\r |
| 736 | .long 0 # offset 63:32\r | |
| 737 | .long 0 # 0 for reserved\r | |
| f3eb2131 | 738 | \r |
| 739 | # soft breakpoint (INT 3)\r | |
| 740 | .equ BREAKPOINT_SEL, .-IDT_BASE\r | |
| b29a823d | 741 | .word 0 # offset 15:0\r |
| f3eb2131 | 742 | .long SYS_CODE64_SEL # selector 15:0\r |
| 743 | .byte 0 # 0 for interrupt gate\r | |
| 744 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present\r | |
| b29a823d | 745 | .word 0 # offset 31:16\r |
| 746 | .long 0 # offset 63:32\r | |
| 747 | .long 0 # 0 for reserved\r | |
| f3eb2131 | 748 | \r |
| 749 | # overflow (INT 4)\r | |
| 750 | .equ OVERFLOW_SEL, .-IDT_BASE\r | |
| b29a823d | 751 | .word 0 # offset 15:0\r |
| f3eb2131 | 752 | .long SYS_CODE64_SEL # selector 15:0\r |
| 753 | .byte 0 # 0 for interrupt gate\r | |
| 754 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present\r | |
| b29a823d | 755 | .word 0 # offset 31:16\r |
| 756 | .long 0 # offset 63:32\r | |
| 757 | .long 0 # 0 for reserved\r | |
| f3eb2131 | 758 | \r |
| 759 | # bounds check (INT 5)\r | |
| 760 | .equ BOUNDS_CHECK_SEL, .-IDT_BASE\r | |
| b29a823d | 761 | .word 0 # offset 15:0\r |
| f3eb2131 | 762 | .long SYS_CODE64_SEL # selector 15:0\r |
| 763 | .byte 0 # 0 for interrupt gate\r | |
| 764 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present\r | |
| b29a823d | 765 | .word 0 # offset 31:16\r |
| 766 | .long 0 # offset 63:32\r | |
| 767 | .long 0 # 0 for reserved\r | |
| f3eb2131 | 768 | \r |
| 769 | # invalid opcode (INT 6)\r | |
| 770 | .equ INVALID_OPCODE_SEL, .-IDT_BASE\r | |
| b29a823d | 771 | .word 0 # offset 15:0\r |
| f3eb2131 | 772 | .long SYS_CODE64_SEL # selector 15:0\r |
| 773 | .byte 0 # 0 for interrupt gate\r | |
| 774 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present\r | |
| b29a823d | 775 | .word 0 # offset 31:16\r |
| 776 | .long 0 # offset 63:32\r | |
| 777 | .long 0 # 0 for reserved\r | |
| f3eb2131 | 778 | \r |
| 779 | # device not available (INT 7)\r | |
| 780 | .equ DEV_NOT_AVAIL_SEL, .-IDT_BASE\r | |
| b29a823d | 781 | .word 0 # offset 15:0\r |
| f3eb2131 | 782 | .long SYS_CODE64_SEL # selector 15:0\r |
| 783 | .byte 0 # 0 for interrupt gate\r | |
| 784 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present\r | |
| b29a823d | 785 | .word 0 # offset 31:16\r |
| 786 | .long 0 # offset 63:32\r | |
| 787 | .long 0 # 0 for reserved\r | |
| f3eb2131 | 788 | \r |
| 789 | # double fault (INT 8)\r | |
| 790 | .equ DOUBLE_FAULT_SEL, .-IDT_BASE\r | |
| b29a823d | 791 | .word 0 # offset 15:0\r |
| f3eb2131 | 792 | .long SYS_CODE64_SEL # selector 15:0\r |
| 793 | .byte 0 # 0 for interrupt gate\r | |
| 794 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present\r | |
| b29a823d | 795 | .word 0 # offset 31:16\r |
| 796 | .long 0 # offset 63:32\r | |
| 797 | .long 0 # 0 for reserved\r | |
| f3eb2131 | 798 | \r |
| 799 | # Coprocessor segment overrun - reserved (INT 9)\r | |
| 800 | .equ RSVD_INTR_SEL1, .-IDT_BASE\r | |
| b29a823d | 801 | .word 0 # offset 15:0\r |
| f3eb2131 | 802 | .long SYS_CODE64_SEL # selector 15:0\r |
| 803 | .byte 0 # 0 for interrupt gate\r | |
| 804 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present\r | |
| b29a823d | 805 | .word 0 # offset 31:16\r |
| 806 | .long 0 # offset 63:32\r | |
| 807 | .long 0 # 0 for reserved\r | |
| f3eb2131 | 808 | \r |
| 809 | # invalid TSS (INT 0ah)\r | |
| 810 | .equ INVALID_TSS_SEL, .-IDT_BASE\r | |
| b29a823d | 811 | .word 0 # offset 15:0\r |
| f3eb2131 | 812 | .long SYS_CODE64_SEL # selector 15:0\r |
| 813 | .byte 0 # 0 for interrupt gate\r | |
| 814 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present\r | |
| b29a823d | 815 | .word 0 # offset 31:16\r |
| 816 | .long 0 # offset 63:32\r | |
| 817 | .long 0 # 0 for reserved\r | |
| f3eb2131 | 818 | \r |
| 819 | # segment not present (INT 0bh)\r | |
| 820 | .equ SEG_NOT_PRESENT_SEL, .-IDT_BASE\r | |
| b29a823d | 821 | .word 0 # offset 15:0\r |
| f3eb2131 | 822 | .long SYS_CODE64_SEL # selector 15:0\r |
| 823 | .byte 0 # 0 for interrupt gate\r | |
| 824 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present\r | |
| b29a823d | 825 | .word 0 # offset 31:16\r |
| 826 | .long 0 # offset 63:32\r | |
| 827 | .long 0 # 0 for reserved\r | |
| f3eb2131 | 828 | \r |
| 829 | # stack fault (INT 0ch)\r | |
| 830 | .equ STACK_FAULT_SEL, .-IDT_BASE\r | |
| b29a823d | 831 | .word 0 # offset 15:0\r |
| f3eb2131 | 832 | .long SYS_CODE64_SEL # selector 15:0\r |
| 833 | .byte 0 # 0 for interrupt gate\r | |
| 834 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present\r | |
| b29a823d | 835 | .word 0 # offset 31:16\r |
| 836 | .long 0 # offset 63:32\r | |
| 837 | .long 0 # 0 for reserved\r | |
| f3eb2131 | 838 | \r |
| 839 | # general protection (INT 0dh)\r | |
| 840 | .equ GP_FAULT_SEL, .-IDT_BASE\r | |
| b29a823d | 841 | .word 0 # offset 15:0\r |
| f3eb2131 | 842 | .long SYS_CODE64_SEL # selector 15:0\r |
| 843 | .byte 0 # 0 for interrupt gate\r | |
| 844 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present\r | |
| b29a823d | 845 | .word 0 # offset 31:16\r |
| 846 | .long 0 # offset 63:32\r | |
| 847 | .long 0 # 0 for reserved\r | |
| f3eb2131 | 848 | \r |
| 849 | # page fault (INT 0eh)\r | |
| 850 | .equ PAGE_FAULT_SEL, .-IDT_BASE\r | |
| b29a823d | 851 | .word 0 # offset 15:0\r |
| f3eb2131 | 852 | .long SYS_CODE64_SEL # selector 15:0\r |
| 853 | .byte 0 # 0 for interrupt gate\r | |
| 854 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present\r | |
| b29a823d | 855 | .word 0 # offset 31:16\r |
| 856 | .long 0 # offset 63:32\r | |
| 857 | .long 0 # 0 for reserved\r | |
| f3eb2131 | 858 | \r |
| 859 | # Intel reserved - do not use (INT 0fh)\r | |
| 860 | .equ RSVD_INTR_SEL2, .-IDT_BASE\r | |
| b29a823d | 861 | .word 0 # offset 15:0\r |
| f3eb2131 | 862 | .long SYS_CODE64_SEL # selector 15:0\r |
| 863 | .byte 0 # 0 for interrupt gate\r | |
| 864 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present\r | |
| b29a823d | 865 | .word 0 # offset 31:16\r |
| 866 | .long 0 # offset 63:32\r | |
| 867 | .long 0 # 0 for reserved\r | |
| f3eb2131 | 868 | \r |
| 869 | # floating point error (INT 10h)\r | |
| 870 | .equ FLT_POINT_ERR_SEL, .-IDT_BASE\r | |
| b29a823d | 871 | .word 0 # offset 15:0\r |
| f3eb2131 | 872 | .long SYS_CODE64_SEL # selector 15:0\r |
| 873 | .byte 0 # 0 for interrupt gate\r | |
| 874 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present\r | |
| b29a823d | 875 | .word 0 # offset 31:16\r |
| 876 | .long 0 # offset 63:32\r | |
| 877 | .long 0 # 0 for reserved\r | |
| f3eb2131 | 878 | \r |
| 879 | # alignment check (INT 11h)\r | |
| 880 | .equ ALIGNMENT_CHECK_SEL, .-IDT_BASE\r | |
| b29a823d | 881 | .word 0 # offset 15:0\r |
| f3eb2131 | 882 | .long SYS_CODE64_SEL # selector 15:0\r |
| 883 | .byte 0 # 0 for interrupt gate\r | |
| 884 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present\r | |
| b29a823d | 885 | .word 0 # offset 31:16\r |
| 886 | .long 0 # offset 63:32\r | |
| 887 | .long 0 # 0 for reserved\r | |
| f3eb2131 | 888 | \r |
| 889 | # machine check (INT 12h)\r | |
| 890 | .equ MACHINE_CHECK_SEL, .-IDT_BASE\r | |
| b29a823d | 891 | .word 0 # offset 15:0\r |
| f3eb2131 | 892 | .long SYS_CODE64_SEL # selector 15:0\r |
| 893 | .byte 0 # 0 for interrupt gate\r | |
| 894 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present\r | |
| b29a823d | 895 | .word 0 # offset 31:16\r |
| 896 | .long 0 # offset 63:32\r | |
| 897 | .long 0 # 0 for reserved\r | |
| f3eb2131 | 898 | \r |
| 899 | # SIMD floating-point exception (INT 13h)\r | |
| 900 | .equ SIMD_EXCEPTION_SEL, .-IDT_BASE\r | |
| b29a823d | 901 | .word 0 # offset 15:0\r |
| f3eb2131 | 902 | .long SYS_CODE64_SEL # selector 15:0\r |
| 903 | .byte 0 # 0 for interrupt gate\r | |
| 904 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present\r | |
| b29a823d | 905 | .word 0 # offset 31:16\r |
| 906 | .long 0 # offset 63:32\r | |
| 907 | .long 0 # 0 for reserved\r | |
| f3eb2131 | 908 | \r |
| 909 | # 85 unspecified descriptors, First 12 of them are reserved, the rest are avail\r | |
| b29a823d | 910 | .fill 85 * 16, 1, 0 # db (85 * 16) dup(0)\r |
| f3eb2131 | 911 | \r |
| 912 | # IRQ 0 (System timer) - (INT 68h)\r | |
| 913 | .equ IRQ0_SEL, .-IDT_BASE\r | |
| b29a823d | 914 | .word 0 # offset 15:0\r |
| f3eb2131 | 915 | .long SYS_CODE64_SEL # selector 15:0\r |
| 916 | .byte 0 # 0 for interrupt gate\r | |
| 917 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present\r | |
| b29a823d | 918 | .word 0 # offset 31:16\r |
| 919 | .long 0 # offset 63:32\r | |
| 920 | .long 0 # 0 for reserved\r | |
| f3eb2131 | 921 | \r |
| 922 | # IRQ 1 (8042 Keyboard controller) - (INT 69h)\r | |
| 923 | .equ IRQ1_SEL, .-IDT_BASE\r | |
| b29a823d | 924 | .word 0 # offset 15:0\r |
| f3eb2131 | 925 | .long SYS_CODE64_SEL # selector 15:0\r |
| 926 | .byte 0 # 0 for interrupt gate\r | |
| 927 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present\r | |
| b29a823d | 928 | .word 0 # offset 31:16\r |
| 929 | .long 0 # offset 63:32\r | |
| 930 | .long 0 # 0 for reserved\r | |
| f3eb2131 | 931 | \r |
| 932 | # Reserved - IRQ 2 redirect (IRQ 2) - DO NOT USE!!! - (INT 6ah)\r | |
| 933 | .equ IRQ2_SEL, .-IDT_BASE\r | |
| b29a823d | 934 | .word 0 # offset 15:0\r |
| f3eb2131 | 935 | .long SYS_CODE64_SEL # selector 15:0\r |
| 936 | .byte 0 # 0 for interrupt gate\r | |
| 937 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present\r | |
| b29a823d | 938 | .word 0 # offset 31:16\r |
| 939 | .long 0 # offset 63:32\r | |
| 940 | .long 0 # 0 for reserved\r | |
| f3eb2131 | 941 | \r |
| 942 | # IRQ 3 (COM 2) - (INT 6bh)\r | |
| 943 | .equ IRQ3_SEL, .-IDT_BASE\r | |
| b29a823d | 944 | .word 0 # offset 15:0\r |
| f3eb2131 | 945 | .long SYS_CODE64_SEL # selector 15:0\r |
| 946 | .byte 0 # 0 for interrupt gate\r | |
| 947 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present\r | |
| b29a823d | 948 | .word 0 # offset 31:16\r |
| 949 | .long 0 # offset 63:32\r | |
| 950 | .long 0 # 0 for reserved\r | |
| f3eb2131 | 951 | \r |
| 952 | # IRQ 4 (COM 1) - (INT 6ch)\r | |
| 953 | .equ IRQ4_SEL, .-IDT_BASE\r | |
| b29a823d | 954 | .word 0 # offset 15:0\r |
| f3eb2131 | 955 | .long SYS_CODE64_SEL # selector 15:0\r |
| 956 | .byte 0 # 0 for interrupt gate\r | |
| 957 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present\r | |
| b29a823d | 958 | .word 0 # offset 31:16\r |
| 959 | .long 0 # offset 63:32\r | |
| 960 | .long 0 # 0 for reserved\r | |
| f3eb2131 | 961 | \r |
| 962 | # IRQ 5 (LPT 2) - (INT 6dh)\r | |
| 963 | .equ IRQ5_SEL, .-IDT_BASE\r | |
| b29a823d | 964 | .word 0 # offset 15:0\r |
| f3eb2131 | 965 | .long SYS_CODE64_SEL # selector 15:0\r |
| 966 | .byte 0 # 0 for interrupt gate\r | |
| 967 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present\r | |
| b29a823d | 968 | .word 0 # offset 31:16\r |
| 969 | .long 0 # offset 63:32\r | |
| 970 | .long 0 # 0 for reserved\r | |
| f3eb2131 | 971 | \r |
| 972 | # IRQ 6 (Floppy controller) - (INT 6eh)\r | |
| 973 | .equ IRQ6_SEL, .-IDT_BASE\r | |
| b29a823d | 974 | .word 0 # offset 15:0\r |
| f3eb2131 | 975 | .long SYS_CODE64_SEL # selector 15:0\r |
| 976 | .byte 0 # 0 for interrupt gate\r | |
| 977 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present\r | |
| b29a823d | 978 | .word 0 # offset 31:16\r |
| 979 | .long 0 # offset 63:32\r | |
| 980 | .long 0 # 0 for reserved\r | |
| f3eb2131 | 981 | \r |
| 982 | # IRQ 7 (LPT 1) - (INT 6fh)\r | |
| 983 | .equ IRQ7_SEL, .-IDT_BASE\r | |
| b29a823d | 984 | .word 0 # offset 15:0\r |
| f3eb2131 | 985 | .long SYS_CODE64_SEL # selector 15:0\r |
| 986 | .byte 0 # 0 for interrupt gate\r | |
| 987 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present\r | |
| b29a823d | 988 | .word 0 # offset 31:16\r |
| 989 | .long 0 # offset 63:32\r | |
| 990 | .long 0 # 0 for reserved\r | |
| f3eb2131 | 991 | \r |
| 992 | # IRQ 8 (RTC Alarm) - (INT 70h)\r | |
| 993 | .equ IRQ8_SEL, .-IDT_BASE\r | |
| b29a823d | 994 | .word 0 # offset 15:0\r |
| f3eb2131 | 995 | .long SYS_CODE64_SEL # selector 15:0\r |
| 996 | .byte 0 # 0 for interrupt gate\r | |
| 997 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present\r | |
| b29a823d | 998 | .word 0 # offset 31:16\r |
| 999 | .long 0 # offset 63:32\r | |
| 1000 | .long 0 # 0 for reserved\r | |
| f3eb2131 | 1001 | \r |
| 1002 | # IRQ 9 - (INT 71h)\r | |
| 1003 | .equ IRQ9_SEL, .-IDT_BASE\r | |
| b29a823d | 1004 | .word 0 # offset 15:0\r |
| f3eb2131 | 1005 | .long SYS_CODE64_SEL # selector 15:0\r |
| 1006 | .byte 0 # 0 for interrupt gate\r | |
| 1007 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present\r | |
| b29a823d | 1008 | .word 0 # offset 31:16\r |
| 1009 | .long 0 # offset 63:32\r | |
| 1010 | .long 0 # 0 for reserved\r | |
| f3eb2131 | 1011 | \r |
| 1012 | # IRQ 10 - (INT 72h)\r | |
| 1013 | .equ IRQ10_SEL, .-IDT_BASE\r | |
| b29a823d | 1014 | .word 0 # offset 15:0\r |
| f3eb2131 | 1015 | .long SYS_CODE64_SEL # selector 15:0\r |
| 1016 | .byte 0 # 0 for interrupt gate\r | |
| 1017 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present\r | |
| b29a823d | 1018 | .word 0 # offset 31:16\r |
| 1019 | .long 0 # offset 63:32\r | |
| 1020 | .long 0 # 0 for reserved\r | |
| f3eb2131 | 1021 | \r |
| 1022 | # IRQ 11 - (INT 73h)\r | |
| 1023 | .equ IRQ11_SEL, .-IDT_BASE\r | |
| b29a823d | 1024 | .word 0 # offset 15:0\r |
| f3eb2131 | 1025 | .long SYS_CODE64_SEL # selector 15:0\r |
| 1026 | .byte 0 # 0 for interrupt gate\r | |
| 1027 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present\r | |
| b29a823d | 1028 | .word 0 # offset 31:16\r |
| 1029 | .long 0 # offset 63:32\r | |
| 1030 | .long 0 # 0 for reserved\r | |
| f3eb2131 | 1031 | \r |
| 1032 | # IRQ 12 (PS/2 mouse) - (INT 74h)\r | |
| 1033 | .equ IRQ12_SEL, .-IDT_BASE\r | |
| b29a823d | 1034 | .word 0 # offset 15:0\r |
| f3eb2131 | 1035 | .long SYS_CODE64_SEL # selector 15:0\r |
| 1036 | .byte 0 # 0 for interrupt gate\r | |
| 1037 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present\r | |
| b29a823d | 1038 | .word 0 # offset 31:16\r |
| 1039 | .long 0 # offset 63:32\r | |
| 1040 | .long 0 # 0 for reserved\r | |
| f3eb2131 | 1041 | \r |
| 1042 | # IRQ 13 (Floating point error) - (INT 75h)\r | |
| 1043 | .equ IRQ13_SEL, .-IDT_BASE\r | |
| b29a823d | 1044 | .word 0 # offset 15:0\r |
| f3eb2131 | 1045 | .long SYS_CODE64_SEL # selector 15:0\r |
| 1046 | .byte 0 # 0 for interrupt gate\r | |
| 1047 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present\r | |
| b29a823d | 1048 | .word 0 # offset 31:16\r |
| 1049 | .long 0 # offset 63:32\r | |
| 1050 | .long 0 # 0 for reserved\r | |
| f3eb2131 | 1051 | \r |
| 1052 | # IRQ 14 (Secondary IDE) - (INT 76h)\r | |
| 1053 | .equ IRQ14_SEL, .-IDT_BASE\r | |
| b29a823d | 1054 | .word 0 # offset 15:0\r |
| f3eb2131 | 1055 | .long SYS_CODE64_SEL # selector 15:0\r |
| 1056 | .byte 0 # 0 for interrupt gate\r | |
| 1057 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present\r | |
| b29a823d | 1058 | .word 0 # offset 31:16\r |
| 1059 | .long 0 # offset 63:32\r | |
| 1060 | .long 0 # 0 for reserved\r | |
| f3eb2131 | 1061 | \r |
| 1062 | # IRQ 15 (Primary IDE) - (INT 77h)\r | |
| 1063 | .equ IRQ15_SEL, .-IDT_BASE\r | |
| b29a823d | 1064 | .word 0 # offset 15:0\r |
| f3eb2131 | 1065 | .long SYS_CODE64_SEL # selector 15:0\r |
| 1066 | .byte 0 # 0 for interrupt gate\r | |
| 1067 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present\r | |
| b29a823d | 1068 | .word 0 # offset 31:16\r |
| 1069 | .long 0 # offset 63:32\r | |
| 1070 | .long 0 # 0 for reserved\r | |
| f3eb2131 | 1071 | \r |
| 1072 | IDT_END: \r | |
| 1073 | \r | |
| 9811c392 | 1074 | .p2align 1\r |
| f3eb2131 | 1075 | \r |
| 1076 | MemoryMapSize: .long 0\r | |
| 1077 | MemoryMap: .long 0,0,0,0,0,0,0,0\r | |
| 1078 | .long 0,0,0,0,0,0,0,0\r | |
| 1079 | .long 0,0,0,0,0,0,0,0\r | |
| 1080 | .long 0,0,0,0,0,0,0,0\r | |
| 1081 | .long 0,0,0,0,0,0,0,0\r | |
| 1082 | .long 0,0,0,0,0,0,0,0\r | |
| 1083 | .long 0,0,0,0,0,0,0,0\r | |
| 1084 | .long 0,0,0,0,0,0,0,0\r | |
| 1085 | .long 0,0,0,0,0,0,0,0\r | |
| 1086 | .long 0,0,0,0,0,0,0,0\r | |
| 1087 | .long 0,0,0,0,0,0,0,0\r | |
| 1088 | .long 0,0,0,0,0,0,0,0\r | |
| 1089 | .long 0,0,0,0,0,0,0,0\r | |
| 1090 | .long 0,0,0,0,0,0,0,0\r | |
| 1091 | .long 0,0,0,0,0,0,0,0\r | |
| 1092 | .long 0,0,0,0,0,0,0,0\r | |
| 1093 | .long 0,0,0,0,0,0,0,0\r | |
| 1094 | .long 0,0,0,0,0,0,0,0\r | |
| 1095 | .long 0,0,0,0,0,0,0,0\r | |
| 1096 | .long 0,0,0,0,0,0,0,0\r | |
| 1097 | .long 0,0,0,0,0,0,0,0\r | |
| 1098 | .long 0,0,0,0,0,0,0,0\r | |
| 1099 | .long 0,0,0,0,0,0,0,0\r | |
| 1100 | .long 0,0,0,0,0,0,0,0\r | |
| 1101 | .long 0,0,0,0,0,0,0,0\r | |
| 1102 | .long 0,0,0,0,0,0,0,0\r | |
| 1103 | .long 0,0,0,0,0,0,0,0\r | |
| 1104 | .long 0,0,0,0,0,0,0,0\r | |
| 1105 | .long 0,0,0,0,0,0,0,0\r | |
| 1106 | .long 0,0,0,0,0,0,0,0\r | |
| 1107 | \r | |
| 1108 | .long 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0\r | |
| 1109 | .long 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0\r | |
| 1110 | \r | |
| b29a823d | 1111 | .org 0x0fe0\r |
| f3eb2131 | 1112 | MyStack: \r |
| 1113 | # below is the pieces of the IVT that is used to redirect INT 68h - 6fh\r | |
| 1114 | # back to INT 08h - 0fh when in real mode... It is 'org'ed to a\r | |
| 1115 | # known low address (20f00) so it can be set up by PlMapIrqToVect in\r | |
| 1116 | # 8259.c\r | |
| 1117 | \r | |
| 1118 | int $8\r | |
| 1119 | iret\r | |
| 1120 | \r | |
| 1121 | int $9\r | |
| 1122 | iret\r | |
| 1123 | \r | |
| 1124 | int $10\r | |
| 1125 | iret\r | |
| 1126 | \r | |
| 1127 | int $11\r | |
| 1128 | iret\r | |
| 1129 | \r | |
| 1130 | int $12\r | |
| 1131 | iret\r | |
| 1132 | \r | |
| 1133 | int $13\r | |
| 1134 | iret\r | |
| 1135 | \r | |
| 1136 | int $14\r | |
| 1137 | iret\r | |
| 1138 | \r | |
| 1139 | int $15\r | |
| 1140 | iret\r | |
| 1141 | \r | |
| 1142 | \r | |
| b29a823d | 1143 | .org 0x0ffe\r |
| f3eb2131 | 1144 | BlockSignature: \r |
| 1145 | .word 0xaa55\r | |
| 1146 | \r |