| | 1 | #------------------------------------------------------------------------------\r |
| | 2 | #*\r |
| | 3 | #* Copyright (c) 2006 - 2012, Intel Corporation. All rights reserved.<BR>\r |
| | 4 | #* This program and the accompanying materials \r |
| | 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 | #* st32_64.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 |
| | 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 |
| | 28 | \r |
| | 29 | .org 0x0\r |
| | 30 | \r |
| | 31 | .global _start\r |
| | 32 | _start:\r |
| | 33 | \r |
| | 34 | Ia32Jump: \r |
| | 35 | jmp BootSectorEntryPoint # JMP inst - 3 bytes\r |
| | 36 | nop\r |
| | 37 | \r |
| | 38 | OemId: .ascii "INTEL " # OemId - 8 bytes\r |
| | 39 | SectorSize: .word 0 # Sector Size - 2 bytes\r |
| | 40 | SectorsPerCluster: .byte 0 # Sector Per Cluster - 1 byte\r |
| | 41 | ReservedSectors: .word 0 # Reserved Sectors - 2 bytes\r |
| | 42 | NoFats: .byte 0 # Number of FATs - 1 byte\r |
| | 43 | RootEntries: .word 0 # Root Entries - 2 bytes\r |
| | 44 | Sectors: .word 0 # Number of Sectors - 2 bytes\r |
| | 45 | Media: .byte 0 # Media - 1 byte\r |
| | 46 | SectorsPerFat16: .word 0 # Sectors Per FAT for FAT12/FAT16 - 2 byte\r |
| | 47 | SectorsPerTrack: .word 0 # Sectors Per Track - 2 bytes\r |
| | 48 | Heads: .word 0 # Heads - 2 bytes\r |
| | 49 | HiddenSectors: .long 0 # Hidden Sectors - 4 bytes\r |
| | 50 | LargeSectors: .long 0 # Large Sectors - 4 bytes\r |
| | 51 | \r |
| | 52 | #******************************************************************************\r |
| | 53 | #\r |
| | 54 | #The structure for FAT32 starting at offset 36 of the boot sector. (At this point, \r |
| | 55 | #the BPB/boot sector for FAT12 and FAT16 differs from the BPB/boot sector for FAT32.)\r |
| | 56 | #\r |
| | 57 | #******************************************************************************\r |
| | 58 | \r |
| | 59 | SectorsPerFat32: .long 0 # Sectors Per FAT for FAT32 - 4 bytes\r |
| | 60 | ExtFlags: .word 0 # Mirror Flag - 2 bytes\r |
| | 61 | FSVersion: .word 0 # File System Version - 2 bytes\r |
| | 62 | RootCluster: .long 0 # 1st Cluster Number of Root Dir - 4 bytes\r |
| | 63 | FSInfo: .word 0 # Sector Number of FSINFO - 2 bytes\r |
| | 64 | BkBootSector: .word 0 # Sector Number of Bk BootSector - 2 bytes\r |
| | 65 | Reserved: .fill 12,1,0 # Reserved Field - 12 bytes\r |
| | 66 | PhysicalDrive: .byte 0 # Physical Drive Number - 1 byte\r |
| | 67 | Reserved1: .byte 0 # Reserved Field - 1 byte\r |
| | 68 | Signature: .byte 0 # Extended Boot Signature - 1 byte\r |
| | 69 | VolId: .ascii " " # Volume Serial Number - 4 bytes\r |
| | 70 | FatLabel: .ascii " " # Volume Label - 11 bytes\r |
| | 71 | FileSystemType: .ascii "FAT32 " # File System Type - 8 bytes\r |
| | 72 | \r |
| | 73 | \r |
| | 74 | BootSectorEntryPoint: \r |
| | 75 | # ASSUME ds:@code\r |
| | 76 | # ASSUME ss:@code\r |
| | 77 | # ds = 1000, es = 2000 + x (size of first cluster >> 4)\r |
| | 78 | # cx = Start Cluster of EfiLdr\r |
| | 79 | # dx = Start Cluster of Efivar.bin\r |
| | 80 | \r |
| | 81 | # Re use the BPB data stored in Boot Sector\r |
| | 82 | movw $0x7c00,%bp\r |
| | 83 | \r |
| | 84 | pushw %cx\r |
| | 85 | # Read Efivar.bin\r |
| | 86 | # 1000:dx = DirectoryEntry of Efivar.bin -> BS.com has filled already\r |
| | 87 | movw $0x1900,%ax\r |
| | 88 | movw %ax,%es\r |
| | 89 | testw %dx,%dx\r |
| | 90 | jnz CheckVarStoreSize\r |
| | 91 | \r |
| | 92 | movb $1,%al\r |
| | 93 | NoVarStore: \r |
| | 94 | pushw %es\r |
| | 95 | # Set the 5th byte start @ 0:19000 to non-zero indicating we should init var store header in DxeIpl\r |
| | 96 | movb %al, %es:(4)\r |
| | 97 | jmp SaveVolumeId\r |
| | 98 | \r |
| | 99 | CheckVarStoreSize: \r |
| | 100 | movw %dx,%di\r |
| | 101 | cmpl $0x4000, %ds:2(%di)\r |
| | 102 | movb $2,%al\r |
| | 103 | jne NoVarStore\r |
| | 104 | \r |
| | 105 | LoadVarStore: \r |
| | 106 | movb $0,%al\r |
| | 107 | movb %al, %es:(4)\r |
| | 108 | movw (%di), %cx\r |
| | 109 | # ES:DI = 1500:0\r |
| | 110 | xorw %di,%di\r |
| | 111 | pushw %es\r |
| | 112 | movw $0x1500,%ax\r |
| | 113 | movw %ax,%es\r |
| | 114 | call ReadFile\r |
| | 115 | SaveVolumeId: \r |
| | 116 | popw %es\r |
| | 117 | movw VolId(%bp), %ax\r |
| | 118 | movw %ax, %es:(0) # Save Volume Id to 0:19000. we will find the correct volume according to this VolumeId\r |
| | 119 | movw VolId+2(%bp), %ax\r |
| | 120 | movw %ax, %es:(2)\r |
| | 121 | \r |
| | 122 | # Read Efildr\r |
| | 123 | popw %cx\r |
| | 124 | # cx = Start Cluster of Efildr -> BS.com has filled already\r |
| | 125 | # ES:DI = 2000:0, first cluster will be read again\r |
| | 126 | xorw %di,%di # di = 0\r |
| | 127 | movw $0x2000,%ax\r |
| | 128 | movw %ax,%es\r |
| | 129 | call ReadFile\r |
| | 130 | movw %cs,%ax\r |
| | 131 | movw %ax, %cs:JumpSegment\r |
| | 132 | \r |
| | 133 | CheckEm64T: \r |
| | 134 | movl $0x80000001,%eax\r |
| | 135 | # cpuid\r |
| | 136 | .word 0xA20F\r |
| | 137 | btl $29,%edx\r |
| | 138 | jc CheckEm64TPass\r |
| | 139 | pushw %cs\r |
| | 140 | popw %ds\r |
| | 141 | leaw Em64String,%si\r |
| | 142 | movw $18,%cx\r |
| | 143 | jmp PrintStringAndHalt\r |
| | 144 | CheckEm64TPass: \r |
| | 145 | JumpFarInstruction: \r |
| | 146 | .byte 0xea\r |
| | 147 | JumpOffset: \r |
| | 148 | .word 0x200\r |
| | 149 | JumpSegment: \r |
| | 150 | .word 0x2000\r |
| | 151 | \r |
| | 152 | \r |
| | 153 | \r |
| | 154 | # ****************************************************************************\r |
| | 155 | # ReadFile\r |
| | 156 | #\r |
| | 157 | # Arguments:\r |
| | 158 | # CX = Start Cluster of File\r |
| | 159 | # ES:DI = Buffer to store file content read from disk\r |
| | 160 | #\r |
| | 161 | # Return:\r |
| | 162 | # (ES << 4 + DI) = end of file content Buffer\r |
| | 163 | #\r |
| | 164 | # ****************************************************************************\r |
| | 165 | ReadFile: \r |
| | 166 | # si = NumberOfClusters\r |
| | 167 | # cx = ClusterNumber\r |
| | 168 | # dx = CachedFatSectorNumber\r |
| | 169 | # ds:0000 = CacheFatSectorBuffer\r |
| | 170 | # es:di = Buffer to load file\r |
| | 171 | # bx = NextClusterNumber\r |
| | 172 | pusha\r |
| | 173 | movw $1,%si # NumberOfClusters = 1\r |
| | 174 | pushw %cx # Push Start Cluster onto stack\r |
| | 175 | movw $0xfff,%dx # CachedFatSectorNumber = 0xfff\r |
| | 176 | FatChainLoop: \r |
| | 177 | movw %cx,%ax # ax = ClusterNumber \r |
| | 178 | andw $0xfff8,%ax # ax = ax & 0xfff8\r |
| | 179 | cmpw $0xfff8,%ax # See if this is the last cluster\r |
| | 180 | je FoundLastCluster # Jump if last cluster found\r |
| | 181 | movw %cx,%ax # ax = ClusterNumber\r |
| | 182 | shlw $2, %ax # FatOffset = ClusterNumber * 2\r |
| | 183 | pushw %si # Save si\r |
| | 184 | movw %ax,%si # si = FatOffset\r |
| | 185 | shrw $BLOCK_SHIFT, %ax # ax = FatOffset >> BLOCK_SHIFT\r |
| | 186 | addw ReservedSectors(%bp), %ax # ax = FatSectorNumber = ReservedSectors + (FatOffset >> BLOCK_OFFSET)\r |
| | 187 | andw $BLOCK_MASK, %si # si = FatOffset & BLOCK_MASK\r |
| | 188 | cmpw %dx,%ax # Compare FatSectorNumber to CachedFatSectorNumber\r |
| | 189 | je SkipFatRead\r |
| | 190 | movw $2,%bx\r |
| | 191 | pushw %es\r |
| | 192 | pushw %ds\r |
| | 193 | popw %es\r |
| | 194 | call ReadBlocks # Read 2 blocks starting at AX storing at ES:DI\r |
| | 195 | popw %es\r |
| | 196 | movw %ax,%dx # CachedFatSectorNumber = FatSectorNumber\r |
| | 197 | SkipFatRead: \r |
| | 198 | movw (%si), %bx # bx = NextClusterNumber\r |
| | 199 | movw %cx,%ax # ax = ClusterNumber\r |
| | 200 | popw %si # Restore si\r |
| | 201 | decw %bx # bx = NextClusterNumber - 1\r |
| | 202 | cmpw %cx,%bx # See if (NextClusterNumber-1)==ClusterNumber\r |
| | 203 | jne ReadClusters\r |
| | 204 | incw %bx # bx = NextClusterNumber\r |
| | 205 | incw %si # NumberOfClusters++\r |
| | 206 | movw %bx,%cx # ClusterNumber = NextClusterNumber\r |
| | 207 | jmp FatChainLoop\r |
| | 208 | ReadClusters: \r |
| | 209 | incw %bx\r |
| | 210 | popw %ax # ax = StartCluster\r |
| | 211 | pushw %bx # StartCluster = NextClusterNumber\r |
| | 212 | movw %bx,%cx # ClusterNumber = NextClusterNumber\r |
| | 213 | subw $2,%ax # ax = StartCluster - 2\r |
| | 214 | xorb %bh,%bh\r |
| | 215 | movb SectorsPerCluster(%bp), %bl # bx = SectorsPerCluster\r |
| | 216 | mulw %bx # ax = (StartCluster - 2) * SectorsPerCluster\r |
| | 217 | addw (%bp), %ax # ax = FirstClusterLBA + (StartCluster-2)*SectorsPerCluster\r |
| | 218 | pushw %ax # save start sector\r |
| | 219 | movw %si,%ax # ax = NumberOfClusters\r |
| | 220 | mulw %bx # ax = NumberOfClusters * SectorsPerCluster\r |
| | 221 | movw %ax,%bx # bx = Number of Sectors\r |
| | 222 | popw %ax # ax = Start Sector\r |
| | 223 | call ReadBlocks\r |
| | 224 | movw $1,%si # NumberOfClusters = 1\r |
| | 225 | jmp FatChainLoop\r |
| | 226 | FoundLastCluster: \r |
| | 227 | popw %cx\r |
| | 228 | popa\r |
| | 229 | ret\r |
| | 230 | \r |
| | 231 | \r |
| | 232 | # ****************************************************************************\r |
| | 233 | # ReadBlocks - Reads a set of blocks from a block device\r |
| | 234 | #\r |
| | 235 | # AX = Start LBA\r |
| | 236 | # BX = Number of Blocks to Read\r |
| | 237 | # ES:DI = Buffer to store sectors read from disk\r |
| | 238 | # ****************************************************************************\r |
| | 239 | \r |
| | 240 | # cx = Blocks\r |
| | 241 | # bx = NumberOfBlocks\r |
| | 242 | # si = StartLBA\r |
| | 243 | \r |
| | 244 | ReadBlocks: \r |
| | 245 | pusha\r |
| | 246 | addl LBAOffsetForBootSector(%bp), %eax # Add LBAOffsetForBootSector to Start LBA\r |
| | 247 | addl HiddenSectors(%bp), %eax # Add HiddenSectors to Start LBA\r |
| | 248 | movl %eax,%esi # esi = Start LBA\r |
| | 249 | movw %bx,%cx # cx = Number of blocks to read\r |
| | 250 | ReadCylinderLoop: \r |
| | 251 | movw $0x7bfc,%bp # bp = 0x7bfc\r |
| | 252 | movl %esi,%eax # eax = Start LBA\r |
| | 253 | xorl %edx,%edx # edx = 0\r |
| | 254 | movzwl (%bp), %ebx # bx = MaxSector\r |
| | 255 | divl %ebx # ax = StartLBA / MaxSector\r |
| | 256 | incw %dx # dx = (StartLBA % MaxSector) + 1\r |
| | 257 | \r |
| | 258 | movw (%bp), %bx # bx = MaxSector\r |
| | 259 | subw %dx,%bx # bx = MaxSector - Sector\r |
| | 260 | incw %bx # bx = MaxSector - Sector + 1\r |
| | 261 | cmpw %bx,%cx # Compare (Blocks) to (MaxSector - Sector + 1)\r |
| | 262 | jg LimitTransfer\r |
| | 263 | movw %cx,%bx # bx = Blocks\r |
| | 264 | LimitTransfer: \r |
| | 265 | pushw %ax # save ax\r |
| | 266 | movw %es,%ax # ax = es\r |
| | 267 | shrw $(BLOCK_SHIFT-4), %ax # ax = Number of blocks into mem system\r |
| | 268 | andw $0x7f,%ax # ax = Number of blocks into current seg\r |
| | 269 | addw %bx,%ax # ax = End Block number of transfer\r |
| | 270 | cmpw $0x80,%ax # See if it crosses a 64K boundry\r |
| | 271 | jle NotCrossing64KBoundry # Branch if not crossing 64K boundry\r |
| | 272 | subw $0x80,%ax # ax = Number of blocks past 64K boundry\r |
| | 273 | subw %ax,%bx # Decrease transfer size by block overage\r |
| | 274 | NotCrossing64KBoundry: \r |
| | 275 | popw %ax # restore ax\r |
| | 276 | \r |
| | 277 | pushw %cx\r |
| | 278 | movb %dl,%cl # cl = (StartLBA % MaxSector) + 1 = Sector\r |
| | 279 | xorw %dx,%dx # dx = 0\r |
| | 280 | divw 2(%bp) # ax = ax / (MaxHead + 1) = Cylinder \r |
| | 281 | # dx = ax % (MaxHead + 1) = Head\r |
| | 282 | \r |
| | 283 | pushw %bx # Save number of blocks to transfer\r |
| | 284 | movb %dl,%dh # dh = Head\r |
| | 285 | movw $0x7c00,%bp # bp = 0x7c00\r |
| | 286 | movb PhysicalDrive(%bp), %dl # dl = Drive Number\r |
| | 287 | movb %al,%ch # ch = Cylinder\r |
| | 288 | movb %bl,%al # al = Blocks\r |
| | 289 | movb $2,%ah # ah = Function 2\r |
| | 290 | movw %di,%bx # es:bx = Buffer address\r |
| | 291 | int $0x13\r |
| | 292 | jc DiskError\r |
| | 293 | popw %bx\r |
| | 294 | popw %cx\r |
| | 295 | movzwl %bx,%ebx\r |
| | 296 | addl %ebx,%esi # StartLBA = StartLBA + NumberOfBlocks\r |
| | 297 | subw %bx,%cx # Blocks = Blocks - NumberOfBlocks\r |
| | 298 | movw %es,%ax\r |
| | 299 | shlw $(BLOCK_SHIFT-4), %bx\r |
| | 300 | addw %bx,%ax\r |
| | 301 | movw %ax,%es # es:di = es:di + NumberOfBlocks*BLOCK_SIZE\r |
| | 302 | cmpw $0,%cx\r |
| | 303 | jne ReadCylinderLoop\r |
| | 304 | popa\r |
| | 305 | ret\r |
| | 306 | \r |
| | 307 | DiskError: \r |
| | 308 | pushw %cs\r |
| | 309 | popw %ds\r |
| | 310 | leaw ErrorString,%si\r |
| | 311 | movw $7,%cx\r |
| | 312 | jmp PrintStringAndHalt\r |
| | 313 | \r |
| | 314 | PrintStringAndHalt: \r |
| | 315 | movw $0xb800,%ax\r |
| | 316 | movw %ax,%es\r |
| | 317 | movw $160,%di\r |
| | 318 | rep\r |
| | 319 | movsw\r |
| | 320 | Halt: \r |
| | 321 | jmp Halt\r |
| | 322 | \r |
| | 323 | ErrorString: \r |
| | 324 | .byte 'S', 0x0c, 'E', 0x0c, 'r', 0x0c, 'r', 0x0c, 'o', 0x0c, 'r', 0x0c, '!',0x0c\r |
| | 325 | \r |
| | 326 | .org 0x01fa\r |
| | 327 | LBAOffsetForBootSector: \r |
| | 328 | .long 0x0\r |
| | 329 | \r |
| | 330 | .org 0x01fe\r |
| | 331 | .word 0xaa55\r |
| | 332 | \r |
| | 333 | #******************************************************************************\r |
| | 334 | #******************************************************************************\r |
| | 335 | #******************************************************************************\r |
| | 336 | \r |
| | 337 | .equ DELAY_PORT, 0x0ed # Port to use for 1uS delay\r |
| | 338 | .equ KBD_CONTROL_PORT, 0x060 # 8042 control port \r |
| | 339 | .equ KBD_STATUS_PORT, 0x064 # 8042 status port \r |
| | 340 | .equ WRITE_DATA_PORT_CMD, 0x0d1 # 8042 command to write the data port\r |
| | 341 | .equ ENABLE_A20_CMD, 0x0df # 8042 command to enable A20\r |
| | 342 | \r |
| | 343 | .org 0x200\r |
| | 344 | jmp start\r |
| | 345 | Em64String: \r |
| | 346 | .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 |
| | 347 | \r |
| | 348 | start: \r |
| | 349 | movw %cs,%ax\r |
| | 350 | movw %ax,%ds\r |
| | 351 | movw %ax,%es\r |
| | 352 | movw %ax,%ss\r |
| | 353 | movw $MyStack, %sp\r |
| | 354 | \r |
| | 355 | # mov ax,0b800h\r |
| | 356 | # mov es,ax\r |
| | 357 | # mov byte ptr es:[160],'a'\r |
| | 358 | # mov ax,cs\r |
| | 359 | # mov es,ax\r |
| | 360 | \r |
| | 361 | movl $0,%ebx\r |
| | 362 | leal MemoryMap, %edi\r |
| | 363 | MemMapLoop: \r |
| | 364 | movl $0xe820,%eax\r |
| | 365 | movl $20,%ecx\r |
| | 366 | movl $0x534d4150, %edx # SMAP\r |
| | 367 | int $0x15\r |
| | 368 | jc MemMapDone\r |
| | 369 | addl $20,%edi\r |
| | 370 | cmpl $0,%ebx\r |
| | 371 | je MemMapDone\r |
| | 372 | jmp MemMapLoop\r |
| | 373 | MemMapDone: \r |
| | 374 | leal MemoryMap, %eax\r |
| | 375 | subl %eax,%edi # Get the address of the memory map\r |
| | 376 | movl %edi, MemoryMapSize # Save the size of the memory map\r |
| | 377 | \r |
| | 378 | xorl %ebx,%ebx\r |
| | 379 | movw %cs,%bx # BX=segment\r |
| | 380 | shll $4,%ebx # BX="linear" address of segment base\r |
| | 381 | leal GDT_BASE(%ebx), %eax # EAX=PHYSICAL address of gdt\r |
| | 382 | movl %eax, (gdtr + 2) # Put address of gdt into the gdtr\r |
| | 383 | leal IDT_BASE(%ebx), %eax # EAX=PHYSICAL address of idt\r |
| | 384 | movl %eax, (idtr + 2) # Put address of idt into the idtr\r |
| | 385 | leal MemoryMapSize(%ebx), %edx # Physical base address of the memory map\r |
| | 386 | \r |
| | 387 | # mov ax,0b800h\r |
| | 388 | # mov es,ax\r |
| | 389 | # mov byte ptr es:[162],'b'\r |
| | 390 | # mov ax,cs\r |
| | 391 | # mov es,ax\r |
| | 392 | \r |
| | 393 | #\r |
| | 394 | # Enable A20 Gate \r |
| | 395 | #\r |
| | 396 | \r |
| | 397 | movw $0x2401,%ax # Enable A20 Gate\r |
| | 398 | int $0x15\r |
| | 399 | jnc A20GateEnabled # Jump if it suceeded\r |
| | 400 | \r |
| | 401 | #\r |
| | 402 | # If INT 15 Function 2401 is not supported, then attempt to Enable A20 manually.\r |
| | 403 | #\r |
| | 404 | \r |
| | 405 | call Empty8042InputBuffer # Empty the Input Buffer on the 8042 controller\r |
| | 406 | jnz Timeout8042 # Jump if the 8042 timed out\r |
| | 407 | outw %ax, $DELAY_PORT # Delay 1 uS\r |
| | 408 | movb $WRITE_DATA_PORT_CMD, %al # 8042 cmd to write output port\r |
| | 409 | outb %al, $KBD_STATUS_PORT # Send command to the 8042\r |
| | 410 | call Empty8042InputBuffer # Empty the Input Buffer on the 8042 controller\r |
| | 411 | jnz Timeout8042 # Jump if the 8042 timed out\r |
| | 412 | movb $ENABLE_A20_CMD, %al # gate address bit 20 on\r |
| | 413 | outb %al, $KBD_CONTROL_PORT # Send command to thre 8042\r |
| | 414 | call Empty8042InputBuffer # Empty the Input Buffer on the 8042 controller\r |
| | 415 | movw $25,%cx # Delay 25 uS for the command to complete on the 8042\r |
| | 416 | Delay25uS: \r |
| | 417 | outw %ax, $DELAY_PORT # Delay 1 uS\r |
| | 418 | loop Delay25uS\r |
| | 419 | Timeout8042: \r |
| | 420 | \r |
| | 421 | \r |
| | 422 | A20GateEnabled: \r |
| | 423 | \r |
| | 424 | #\r |
| | 425 | # DISABLE INTERRUPTS - Entering Protected Mode\r |
| | 426 | #\r |
| | 427 | \r |
| | 428 | cli\r |
| | 429 | \r |
| | 430 | # mov ax,0b800h\r |
| | 431 | # mov es,ax\r |
| | 432 | # mov byte ptr es:[164],'c'\r |
| | 433 | # mov ax,cs\r |
| | 434 | # mov es,ax\r |
| | 435 | \r |
| | 436 | leal OffsetIn32BitProtectedMode, %eax\r |
| | 437 | addl $0x20000+0x6,%eax\r |
| | 438 | movl %eax, OffsetIn32BitProtectedMode \r |
| | 439 | \r |
| | 440 | leal OffsetInLongMode, %eax\r |
| | 441 | addl $0x20000+0x6,%eax\r |
| | 442 | movl %eax, OffsetInLongMode \r |
| | 443 | \r |
| | 444 | #\r |
| | 445 | # load GDT\r |
| | 446 | #\r |
| | 447 | .byte 0x66\r |
| | 448 | lgdt gdtr\r |
| | 449 | \r |
| | 450 | #\r |
| | 451 | # Enable Protect Mode (set CR0.PE=1)\r |
| | 452 | #\r |
| | 453 | movl %cr0, %eax # Read CR0.\r |
| | 454 | orl $0x1,%eax # Set PE=1\r |
| | 455 | movl %eax, %cr0 # Write CR0.\r |
| | 456 | .byte 0x66\r |
| | 457 | .byte 0xea # jmp far 16:32\r |
| | 458 | OffsetIn32BitProtectedMode: \r |
| | 459 | .long 0x0000000 # offset $+8 (In32BitProtectedMode)\r |
| | 460 | .word 0x10 # selector (flat CS)\r |
| | 461 | In32BitProtectedMode: \r |
| | 462 | \r |
| | 463 | #\r |
| | 464 | # Entering Long Mode\r |
| | 465 | #\r |
| | 466 | .byte 0x66\r |
| | 467 | movw $8,%ax\r |
| | 468 | movw %ax,%ds\r |
| | 469 | movw %ax,%es\r |
| | 470 | movw %ax,%ss\r |
| | 471 | \r |
| | 472 | #\r |
| | 473 | # Enable the 64-bit page-translation-table entries by\r |
| | 474 | # setting CR4.PAE=1 (this is _required_ before activating\r |
| | 475 | # long mode). Paging is not enabled until after long mode\r |
| | 476 | # is enabled.\r |
| | 477 | #\r |
| | 478 | .byte 0xf\r |
| | 479 | .byte 0x20\r |
| | 480 | .byte 0xe0\r |
| | 481 | # mov eax, cr4\r |
| | 482 | btsl $5,%eax\r |
| | 483 | .byte 0xf\r |
| | 484 | .byte 0x22\r |
| | 485 | .byte 0xe0\r |
| | 486 | # mov cr4, eax\r |
| | 487 | \r |
| | 488 | #\r |
| | 489 | # This is the Trapolean Page Tables that are guarenteed\r |
| | 490 | # under 4GB.\r |
| | 491 | #\r |
| | 492 | # Address Map:\r |
| | 493 | # 10000 ~ 12000 - efildr (loaded)\r |
| | 494 | # 20000 ~ 21000 - start64.com\r |
| | 495 | # 21000 ~ 22000 - efi64.com\r |
| | 496 | # 22000 ~ 90000 - efildr\r |
| | 497 | # 90000 ~ 96000 - 4G pagetable (will be reload later)\r |
| | 498 | #\r |
| | 499 | .byte 0xb8\r |
| | 500 | .long 0x90000\r |
| | 501 | # mov eax, 90000h\r |
| | 502 | movl %eax, %cr3\r |
| | 503 | \r |
| | 504 | #\r |
| | 505 | # Enable long mode (set EFER.LME=1).\r |
| | 506 | #\r |
| | 507 | .byte 0xb9\r |
| | 508 | .long 0xc0000080\r |
| | 509 | # mov ecx, 0c0000080h ; EFER MSR number.\r |
| | 510 | .byte 0xf\r |
| | 511 | .byte 0x32\r |
| | 512 | # rdmsr ; Read EFER.\r |
| | 513 | .byte 0xf\r |
| | 514 | .byte 0xba\r |
| | 515 | .byte 0xe8\r |
| | 516 | .byte 0x8\r |
| | 517 | # bts eax, 8 ; Set LME=1.\r |
| | 518 | .byte 0xf\r |
| | 519 | .byte 0x30\r |
| | 520 | # wrmsr ; Write EFER.\r |
| | 521 | \r |
| | 522 | #\r |
| | 523 | # Enable paging to activate long mode (set CR0.PG=1)\r |
| | 524 | #\r |
| | 525 | movl %cr0, %eax # Read CR0.\r |
| | 526 | .byte 0xf\r |
| | 527 | .byte 0xba\r |
| | 528 | .byte 0xe8\r |
| | 529 | .byte 0x1f\r |
| | 530 | # bts eax, 31 ; Set PG=1.\r |
| | 531 | movl %eax, %cr0 # Write CR0.\r |
| | 532 | jmp GoToLongMode\r |
| | 533 | GoToLongMode: \r |
| | 534 | \r |
| | 535 | .byte 0x67\r |
| | 536 | .byte 0xea # Far Jump $+9:Selector to reload CS\r |
| | 537 | OffsetInLongMode: \r |
| | 538 | .long 00000000 # $+9 Offset is ensuing instruction boundary\r |
| | 539 | .word 0x38 # Selector is our code selector, 38h\r |
| | 540 | \r |
| | 541 | InLongMode: \r |
| | 542 | .byte 0x66\r |
| | 543 | movw $0x30,%ax\r |
| | 544 | movw %ax,%ds\r |
| | 545 | \r |
| | 546 | .byte 0x66\r |
| | 547 | movw $0x18,%ax\r |
| | 548 | movw %ax,%es\r |
| | 549 | movw %ax,%ss\r |
| | 550 | movw %ax,%ds\r |
| | 551 | \r |
| | 552 | .byte 0xbd\r |
| | 553 | .long 0x400000\r |
| | 554 | # mov ebp,000400000h ; Destination of EFILDR32\r |
| | 555 | .byte 0xbb\r |
| | 556 | .long 0x70000\r |
| | 557 | # mov ebx,000070000h ; Length of copy\r |
| | 558 | \r |
| | 559 | #\r |
| | 560 | # load idt later\r |
| | 561 | #\r |
| | 562 | .byte 0x48\r |
| | 563 | .byte 0x33\r |
| | 564 | .byte 0xc0\r |
| | 565 | # xor rax, rax\r |
| | 566 | .byte 0x66\r |
| | 567 | movw $idtr, %ax\r |
| | 568 | .byte 0x48\r |
| | 569 | .byte 0x5\r |
| | 570 | .long 0x20000\r |
| | 571 | # add rax, 20000h\r |
| | 572 | \r |
| | 573 | .byte 0xf\r |
| | 574 | .byte 0x1\r |
| | 575 | .byte 0x18\r |
| | 576 | # lidt fword ptr [rax]\r |
| | 577 | \r |
| | 578 | .byte 0x48\r |
| | 579 | .byte 0xc7\r |
| | 580 | .byte 0xc0\r |
| | 581 | .long 0x21000\r |
| | 582 | # mov rax, 21000h\r |
| | 583 | .byte 0x50\r |
| | 584 | # push rax\r |
| | 585 | \r |
| | 586 | # ret\r |
| | 587 | .byte 0xc3\r |
| | 588 | \r |
| | 589 | Empty8042InputBuffer: \r |
| | 590 | movw $0,%cx\r |
| | 591 | Empty8042Loop: \r |
| | 592 | outw %ax, $DELAY_PORT # Delay 1us\r |
| | 593 | inb $KBD_STATUS_PORT, %al # Read the 8042 Status Port\r |
| | 594 | andb $0x2,%al # Check the Input Buffer Full Flag\r |
| | 595 | loopnz Empty8042Loop # Loop until the input buffer is empty or a timout of 65536 uS\r |
| | 596 | ret\r |
| | 597 | \r |
| | 598 | ##############################################################################\r |
| | 599 | # data\r |
| | 600 | ##############################################################################\r |
| | 601 | \r |
| | 602 | .p2align 1\r |
| | 603 | \r |
| | 604 | gdtr: .word GDT_END - GDT_BASE - 1 # GDT limit \r |
| | 605 | .long 0 # (GDT base gets set above)\r |
| | 606 | ##############################################################################\r |
| | 607 | # global descriptor table (GDT)\r |
| | 608 | ##############################################################################\r |
| | 609 | \r |
| | 610 | .p2align 1\r |
| | 611 | \r |
| | 612 | GDT_BASE: \r |
| | 613 | # null descriptor\r |
| | 614 | .equ NULL_SEL, .-GDT_BASE # Selector [0x0]\r |
| | 615 | .word 0 # limit 15:0\r |
| | 616 | .word 0 # base 15:0\r |
| | 617 | .byte 0 # base 23:16\r |
| | 618 | .byte 0 # type\r |
| | 619 | .byte 0 # limit 19:16, flags\r |
| | 620 | .byte 0 # base 31:24\r |
| | 621 | \r |
| | 622 | # linear data segment descriptor\r |
| | 623 | .equ LINEAR_SEL, .-GDT_BASE # Selector [0x8]\r |
| | 624 | .word 0xFFFF # limit 0xFFFFF\r |
| | 625 | .word 0 # base 0\r |
| | 626 | .byte 0\r |
| | 627 | .byte 0x92 # present, ring 0, data, expand-up, writable\r |
| | 628 | .byte 0xCF # page-granular, 32-bit\r |
| | 629 | .byte 0\r |
| | 630 | \r |
| | 631 | # linear code segment descriptor\r |
| | 632 | .equ LINEAR_CODE_SEL, .-GDT_BASE # Selector [0x10]\r |
| | 633 | .word 0xFFFF # limit 0xFFFFF\r |
| | 634 | .word 0 # base 0\r |
| | 635 | .byte 0\r |
| | 636 | .byte 0x9A # present, ring 0, data, expand-up, writable\r |
| | 637 | .byte 0xCF # page-granular, 32-bit\r |
| | 638 | .byte 0\r |
| | 639 | \r |
| | 640 | # system data segment descriptor\r |
| | 641 | .equ SYS_DATA_SEL, .-GDT_BASE # Selector [0x18]\r |
| | 642 | .word 0xFFFF # limit 0xFFFFF\r |
| | 643 | .word 0 # base 0\r |
| | 644 | .byte 0\r |
| | 645 | .byte 0x92 # present, ring 0, data, expand-up, writable\r |
| | 646 | .byte 0xCF # page-granular, 32-bit\r |
| | 647 | .byte 0\r |
| | 648 | \r |
| | 649 | # system code segment descriptor\r |
| | 650 | .equ SYS_CODE_SEL, .-GDT_BASE # Selector [0x20]\r |
| | 651 | .word 0xFFFF # limit 0xFFFFF\r |
| | 652 | .word 0 # base 0\r |
| | 653 | .byte 0\r |
| | 654 | .byte 0x9A # present, ring 0, data, expand-up, writable\r |
| | 655 | .byte 0xCF # page-granular, 32-bit\r |
| | 656 | .byte 0\r |
| | 657 | \r |
| | 658 | # spare segment descriptor\r |
| | 659 | .equ SPARE3_SEL, .-GDT_BASE # Selector [0x28]\r |
| | 660 | .word 0 # limit 0xFFFFF\r |
| | 661 | .word 0 # base 0\r |
| | 662 | .byte 0\r |
| | 663 | .byte 0 # present, ring 0, data, expand-up, writable\r |
| | 664 | .byte 0 # page-granular, 32-bit\r |
| | 665 | .byte 0\r |
| | 666 | \r |
| | 667 | #\r |
| | 668 | # system data segment descriptor\r |
| | 669 | #\r |
| | 670 | .equ SYS_DATA64_SEL, .-GDT_BASE # Selector [0x30]\r |
| | 671 | .word 0xFFFF # limit 0xFFFFF\r |
| | 672 | .word 0 # base 0\r |
| | 673 | .byte 0\r |
| | 674 | .byte 0x92 # P | DPL [1..2] | 1 | 1 | C | R | A\r |
| | 675 | .byte 0xCF # G | D | L | AVL | Segment [19..16]\r |
| | 676 | .byte 0\r |
| | 677 | \r |
| | 678 | #\r |
| | 679 | # system code segment descriptor\r |
| | 680 | #\r |
| | 681 | .equ SYS_CODE64_SEL, .-GDT_BASE # Selector [0x38]\r |
| | 682 | .word 0xFFFF # limit 0xFFFFF\r |
| | 683 | .word 0 # base 0\r |
| | 684 | .byte 0\r |
| | 685 | .byte 0x9A # P | DPL [1..2] | 1 | 1 | C | R | A\r |
| | 686 | .byte 0xAF # G | D | L | AVL | Segment [19..16]\r |
| | 687 | .byte 0\r |
| | 688 | \r |
| | 689 | # spare segment descriptor\r |
| | 690 | .equ SPARE4_SEL, .-GDT_BASE # Selector [0x40]\r |
| | 691 | .word 0 # limit 0xFFFFF\r |
| | 692 | .word 0 # base 0\r |
| | 693 | .byte 0\r |
| | 694 | .byte 0 # present, ring 0, data, expand-up, writable\r |
| | 695 | .byte 0 # page-granular, 32-bit\r |
| | 696 | .byte 0\r |
| | 697 | \r |
| | 698 | GDT_END: \r |
| | 699 | \r |
| | 700 | .p2align 1\r |
| | 701 | \r |
| | 702 | \r |
| | 703 | \r |
| | 704 | idtr: .long IDT_END - IDT_BASE - 1 # IDT limit\r |
| | 705 | .quad 0 # (IDT base gets set above)\r |
| | 706 | \r |
| | 707 | ##############################################################################\r |
| | 708 | # interrupt descriptor table (IDT)\r |
| | 709 | #\r |
| | 710 | # Note: The hardware IRQ's specified in this table are the normal PC/AT IRQ\r |
| | 711 | # mappings. This implementation only uses the system timer and all other\r |
| | 712 | # IRQs will remain masked. The descriptors for vectors 33+ are provided\r |
| | 713 | # for convenience.\r |
| | 714 | ##############################################################################\r |
| | 715 | \r |
| | 716 | #idt_tag db "IDT",0 \r |
| | 717 | .p2align 1\r |
| | 718 | \r |
| | 719 | \r |
| | 720 | IDT_BASE: \r |
| | 721 | # divide by zero (INT 0)\r |
| | 722 | .equ DIV_ZERO_SEL, .-IDT_BASE\r |
| | 723 | .word 0 # offset 15:0\r |
| | 724 | .long SYS_CODE64_SEL # selector 15:0\r |
| | 725 | .byte 0 # 0 for interrupt gate\r |
| | 726 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present\r |
| | 727 | .word 0 # offset 31:16\r |
| | 728 | .long 0 # offset 63:32\r |
| | 729 | .long 0 # 0 for reserved\r |
| | 730 | \r |
| | 731 | # debug exception (INT 1)\r |
| | 732 | .equ DEBUG_EXCEPT_SEL, .-IDT_BASE\r |
| | 733 | .word 0 # offset 15:0\r |
| | 734 | .long SYS_CODE64_SEL # selector 15:0\r |
| | 735 | .byte 0 # 0 for interrupt gate\r |
| | 736 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present\r |
| | 737 | .word 0 # offset 31:16\r |
| | 738 | .long 0 # offset 63:32\r |
| | 739 | .long 0 # 0 for reserved\r |
| | 740 | \r |
| | 741 | # NMI (INT 2)\r |
| | 742 | .equ NMI_SEL, .-IDT_BASE\r |
| | 743 | .word 0 # offset 15:0\r |
| | 744 | .long SYS_CODE64_SEL # selector 15:0\r |
| | 745 | .byte 0 # 0 for interrupt gate\r |
| | 746 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present\r |
| | 747 | .word 0 # offset 31:16\r |
| | 748 | .long 0 # offset 63:32\r |
| | 749 | .long 0 # 0 for reserved\r |
| | 750 | \r |
| | 751 | # soft breakpoint (INT 3)\r |
| | 752 | .equ BREAKPOINT_SEL, .-IDT_BASE\r |
| | 753 | .word 0 # offset 15:0\r |
| | 754 | .long SYS_CODE64_SEL # selector 15:0\r |
| | 755 | .byte 0 # 0 for interrupt gate\r |
| | 756 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present\r |
| | 757 | .word 0 # offset 31:16\r |
| | 758 | .long 0 # offset 63:32\r |
| | 759 | .long 0 # 0 for reserved\r |
| | 760 | \r |
| | 761 | # overflow (INT 4)\r |
| | 762 | .equ OVERFLOW_SEL, .-IDT_BASE\r |
| | 763 | .word 0 # offset 15:0\r |
| | 764 | .long SYS_CODE64_SEL # selector 15:0\r |
| | 765 | .byte 0 # 0 for interrupt gate\r |
| | 766 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present\r |
| | 767 | .word 0 # offset 31:16\r |
| | 768 | .long 0 # offset 63:32\r |
| | 769 | .long 0 # 0 for reserved\r |
| | 770 | \r |
| | 771 | # bounds check (INT 5)\r |
| | 772 | .equ BOUNDS_CHECK_SEL, .-IDT_BASE\r |
| | 773 | .word 0 # offset 15:0\r |
| | 774 | .long SYS_CODE64_SEL # selector 15:0\r |
| | 775 | .byte 0 # 0 for interrupt gate\r |
| | 776 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present\r |
| | 777 | .word 0 # offset 31:16\r |
| | 778 | .long 0 # offset 63:32\r |
| | 779 | .long 0 # 0 for reserved\r |
| | 780 | \r |
| | 781 | # invalid opcode (INT 6)\r |
| | 782 | .equ INVALID_OPCODE_SEL, .-IDT_BASE\r |
| | 783 | .word 0 # offset 15:0\r |
| | 784 | .long SYS_CODE64_SEL # selector 15:0\r |
| | 785 | .byte 0 # 0 for interrupt gate\r |
| | 786 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present\r |
| | 787 | .word 0 # offset 31:16\r |
| | 788 | .long 0 # offset 63:32\r |
| | 789 | .long 0 # 0 for reserved\r |
| | 790 | \r |
| | 791 | # device not available (INT 7)\r |
| | 792 | .equ DEV_NOT_AVAIL_SEL, .-IDT_BASE\r |
| | 793 | .word 0 # offset 15:0\r |
| | 794 | .long SYS_CODE64_SEL # selector 15:0\r |
| | 795 | .byte 0 # 0 for interrupt gate\r |
| | 796 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present\r |
| | 797 | .word 0 # offset 31:16\r |
| | 798 | .long 0 # offset 63:32\r |
| | 799 | .long 0 # 0 for reserved\r |
| | 800 | \r |
| | 801 | # double fault (INT 8)\r |
| | 802 | .equ DOUBLE_FAULT_SEL, .-IDT_BASE\r |
| | 803 | .word 0 # offset 15:0\r |
| | 804 | .long SYS_CODE64_SEL # selector 15:0\r |
| | 805 | .byte 0 # 0 for interrupt gate\r |
| | 806 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present\r |
| | 807 | .word 0 # offset 31:16\r |
| | 808 | .long 0 # offset 63:32\r |
| | 809 | .long 0 # 0 for reserved\r |
| | 810 | \r |
| | 811 | # Coprocessor segment overrun - reserved (INT 9)\r |
| | 812 | .equ RSVD_INTR_SEL1, .-IDT_BASE\r |
| | 813 | .word 0 # offset 15:0\r |
| | 814 | .long SYS_CODE64_SEL # selector 15:0\r |
| | 815 | .byte 0 # 0 for interrupt gate\r |
| | 816 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present\r |
| | 817 | .word 0 # offset 31:16\r |
| | 818 | .long 0 # offset 63:32\r |
| | 819 | .long 0 # 0 for reserved\r |
| | 820 | \r |
| | 821 | # invalid TSS (INT 0ah)\r |
| | 822 | .equ INVALID_TSS_SEL, .-IDT_BASE\r |
| | 823 | .word 0 # offset 15:0\r |
| | 824 | .long SYS_CODE64_SEL # selector 15:0\r |
| | 825 | .byte 0 # 0 for interrupt gate\r |
| | 826 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present\r |
| | 827 | .word 0 # offset 31:16\r |
| | 828 | .long 0 # offset 63:32\r |
| | 829 | .long 0 # 0 for reserved\r |
| | 830 | \r |
| | 831 | # segment not present (INT 0bh)\r |
| | 832 | .equ SEG_NOT_PRESENT_SEL, .-IDT_BASE\r |
| | 833 | .word 0 # offset 15:0\r |
| | 834 | .long SYS_CODE64_SEL # selector 15:0\r |
| | 835 | .byte 0 # 0 for interrupt gate\r |
| | 836 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present\r |
| | 837 | .word 0 # offset 31:16\r |
| | 838 | .long 0 # offset 63:32\r |
| | 839 | .long 0 # 0 for reserved\r |
| | 840 | \r |
| | 841 | # stack fault (INT 0ch)\r |
| | 842 | .equ STACK_FAULT_SEL, .-IDT_BASE\r |
| | 843 | .word 0 # offset 15:0\r |
| | 844 | .long SYS_CODE64_SEL # selector 15:0\r |
| | 845 | .byte 0 # 0 for interrupt gate\r |
| | 846 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present\r |
| | 847 | .word 0 # offset 31:16\r |
| | 848 | .long 0 # offset 63:32\r |
| | 849 | .long 0 # 0 for reserved\r |
| | 850 | \r |
| | 851 | # general protection (INT 0dh)\r |
| | 852 | .equ GP_FAULT_SEL, .-IDT_BASE\r |
| | 853 | .word 0 # offset 15:0\r |
| | 854 | .long SYS_CODE64_SEL # selector 15:0\r |
| | 855 | .byte 0 # 0 for interrupt gate\r |
| | 856 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present\r |
| | 857 | .word 0 # offset 31:16\r |
| | 858 | .long 0 # offset 63:32\r |
| | 859 | .long 0 # 0 for reserved\r |
| | 860 | \r |
| | 861 | # page fault (INT 0eh)\r |
| | 862 | .equ PAGE_FAULT_SEL, .-IDT_BASE\r |
| | 863 | .word 0 # offset 15:0\r |
| | 864 | .long SYS_CODE64_SEL # selector 15:0\r |
| | 865 | .byte 0 # 0 for interrupt gate\r |
| | 866 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present\r |
| | 867 | .word 0 # offset 31:16\r |
| | 868 | .long 0 # offset 63:32\r |
| | 869 | .long 0 # 0 for reserved\r |
| | 870 | \r |
| | 871 | # Intel reserved - do not use (INT 0fh)\r |
| | 872 | .equ RSVD_INTR_SEL2, .-IDT_BASE\r |
| | 873 | .word 0 # offset 15:0\r |
| | 874 | .long SYS_CODE64_SEL # selector 15:0\r |
| | 875 | .byte 0 # 0 for interrupt gate\r |
| | 876 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present\r |
| | 877 | .word 0 # offset 31:16\r |
| | 878 | .long 0 # offset 63:32\r |
| | 879 | .long 0 # 0 for reserved\r |
| | 880 | \r |
| | 881 | # floating point error (INT 10h)\r |
| | 882 | .equ FLT_POINT_ERR_SEL, .-IDT_BASE\r |
| | 883 | .word 0 # offset 15:0\r |
| | 884 | .long SYS_CODE64_SEL # selector 15:0\r |
| | 885 | .byte 0 # 0 for interrupt gate\r |
| | 886 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present\r |
| | 887 | .word 0 # offset 31:16\r |
| | 888 | .long 0 # offset 63:32\r |
| | 889 | .long 0 # 0 for reserved\r |
| | 890 | \r |
| | 891 | # alignment check (INT 11h)\r |
| | 892 | .equ ALIGNMENT_CHECK_SEL, .-IDT_BASE\r |
| | 893 | .word 0 # offset 15:0\r |
| | 894 | .long SYS_CODE64_SEL # selector 15:0\r |
| | 895 | .byte 0 # 0 for interrupt gate\r |
| | 896 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present\r |
| | 897 | .word 0 # offset 31:16\r |
| | 898 | .long 0 # offset 63:32\r |
| | 899 | .long 0 # 0 for reserved\r |
| | 900 | \r |
| | 901 | # machine check (INT 12h)\r |
| | 902 | .equ MACHINE_CHECK_SEL, .-IDT_BASE\r |
| | 903 | .word 0 # offset 15:0\r |
| | 904 | .long SYS_CODE64_SEL # selector 15:0\r |
| | 905 | .byte 0 # 0 for interrupt gate\r |
| | 906 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present\r |
| | 907 | .word 0 # offset 31:16\r |
| | 908 | .long 0 # offset 63:32\r |
| | 909 | .long 0 # 0 for reserved\r |
| | 910 | \r |
| | 911 | # SIMD floating-point exception (INT 13h)\r |
| | 912 | .equ SIMD_EXCEPTION_SEL, .-IDT_BASE\r |
| | 913 | .word 0 # offset 15:0\r |
| | 914 | .long SYS_CODE64_SEL # selector 15:0\r |
| | 915 | .byte 0 # 0 for interrupt gate\r |
| | 916 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present\r |
| | 917 | .word 0 # offset 31:16\r |
| | 918 | .long 0 # offset 63:32\r |
| | 919 | .long 0 # 0 for reserved\r |
| | 920 | \r |
| | 921 | # 85 unspecified descriptors, First 12 of them are reserved, the rest are avail\r |
| | 922 | .fill 85 * 16, 1, 0 # db (85 * 16) dup(0)\r |
| | 923 | \r |
| | 924 | # IRQ 0 (System timer) - (INT 68h)\r |
| | 925 | .equ IRQ0_SEL, .-IDT_BASE\r |
| | 926 | .word 0 # offset 15:0\r |
| | 927 | .long SYS_CODE64_SEL # selector 15:0\r |
| | 928 | .byte 0 # 0 for interrupt gate\r |
| | 929 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present\r |
| | 930 | .word 0 # offset 31:16\r |
| | 931 | .long 0 # offset 63:32\r |
| | 932 | .long 0 # 0 for reserved\r |
| | 933 | \r |
| | 934 | # IRQ 1 (8042 Keyboard controller) - (INT 69h)\r |
| | 935 | .equ IRQ1_SEL, .-IDT_BASE\r |
| | 936 | .word 0 # offset 15:0\r |
| | 937 | .long SYS_CODE64_SEL # selector 15:0\r |
| | 938 | .byte 0 # 0 for interrupt gate\r |
| | 939 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present\r |
| | 940 | .word 0 # offset 31:16\r |
| | 941 | .long 0 # offset 63:32\r |
| | 942 | .long 0 # 0 for reserved\r |
| | 943 | \r |
| | 944 | # Reserved - IRQ 2 redirect (IRQ 2) - DO NOT USE!!! - (INT 6ah)\r |
| | 945 | .equ IRQ2_SEL, .-IDT_BASE\r |
| | 946 | .word 0 # offset 15:0\r |
| | 947 | .long SYS_CODE64_SEL # selector 15:0\r |
| | 948 | .byte 0 # 0 for interrupt gate\r |
| | 949 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present\r |
| | 950 | .word 0 # offset 31:16\r |
| | 951 | .long 0 # offset 63:32\r |
| | 952 | .long 0 # 0 for reserved\r |
| | 953 | \r |
| | 954 | # IRQ 3 (COM 2) - (INT 6bh)\r |
| | 955 | .equ IRQ3_SEL, .-IDT_BASE\r |
| | 956 | .word 0 # offset 15:0\r |
| | 957 | .long SYS_CODE64_SEL # selector 15:0\r |
| | 958 | .byte 0 # 0 for interrupt gate\r |
| | 959 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present\r |
| | 960 | .word 0 # offset 31:16\r |
| | 961 | .long 0 # offset 63:32\r |
| | 962 | .long 0 # 0 for reserved\r |
| | 963 | \r |
| | 964 | # IRQ 4 (COM 1) - (INT 6ch)\r |
| | 965 | .equ IRQ4_SEL, .-IDT_BASE\r |
| | 966 | .word 0 # offset 15:0\r |
| | 967 | .long SYS_CODE64_SEL # selector 15:0\r |
| | 968 | .byte 0 # 0 for interrupt gate\r |
| | 969 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present\r |
| | 970 | .word 0 # offset 31:16\r |
| | 971 | .long 0 # offset 63:32\r |
| | 972 | .long 0 # 0 for reserved\r |
| | 973 | \r |
| | 974 | # IRQ 5 (LPT 2) - (INT 6dh)\r |
| | 975 | .equ IRQ5_SEL, .-IDT_BASE\r |
| | 976 | .word 0 # offset 15:0\r |
| | 977 | .long SYS_CODE64_SEL # selector 15:0\r |
| | 978 | .byte 0 # 0 for interrupt gate\r |
| | 979 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present\r |
| | 980 | .word 0 # offset 31:16\r |
| | 981 | .long 0 # offset 63:32\r |
| | 982 | .long 0 # 0 for reserved\r |
| | 983 | \r |
| | 984 | # IRQ 6 (Floppy controller) - (INT 6eh)\r |
| | 985 | .equ IRQ6_SEL, .-IDT_BASE\r |
| | 986 | .word 0 # offset 15:0\r |
| | 987 | .long SYS_CODE64_SEL # selector 15:0\r |
| | 988 | .byte 0 # 0 for interrupt gate\r |
| | 989 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present\r |
| | 990 | .word 0 # offset 31:16\r |
| | 991 | .long 0 # offset 63:32\r |
| | 992 | .long 0 # 0 for reserved\r |
| | 993 | \r |
| | 994 | # IRQ 7 (LPT 1) - (INT 6fh)\r |
| | 995 | .equ IRQ7_SEL, .-IDT_BASE\r |
| | 996 | .word 0 # offset 15:0\r |
| | 997 | .long SYS_CODE64_SEL # selector 15:0\r |
| | 998 | .byte 0 # 0 for interrupt gate\r |
| | 999 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present\r |
| | 1000 | .word 0 # offset 31:16\r |
| | 1001 | .long 0 # offset 63:32\r |
| | 1002 | .long 0 # 0 for reserved\r |
| | 1003 | \r |
| | 1004 | # IRQ 8 (RTC Alarm) - (INT 70h)\r |
| | 1005 | .equ IRQ8_SEL, .-IDT_BASE\r |
| | 1006 | .word 0 # offset 15:0\r |
| | 1007 | .long SYS_CODE64_SEL # selector 15:0\r |
| | 1008 | .byte 0 # 0 for interrupt gate\r |
| | 1009 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present\r |
| | 1010 | .word 0 # offset 31:16\r |
| | 1011 | .long 0 # offset 63:32\r |
| | 1012 | .long 0 # 0 for reserved\r |
| | 1013 | \r |
| | 1014 | # IRQ 9 - (INT 71h)\r |
| | 1015 | .equ IRQ9_SEL, .-IDT_BASE\r |
| | 1016 | .word 0 # offset 15:0\r |
| | 1017 | .long SYS_CODE64_SEL # selector 15:0\r |
| | 1018 | .byte 0 # 0 for interrupt gate\r |
| | 1019 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present\r |
| | 1020 | .word 0 # offset 31:16\r |
| | 1021 | .long 0 # offset 63:32\r |
| | 1022 | .long 0 # 0 for reserved\r |
| | 1023 | \r |
| | 1024 | # IRQ 10 - (INT 72h)\r |
| | 1025 | .equ IRQ10_SEL, .-IDT_BASE\r |
| | 1026 | .word 0 # offset 15:0\r |
| | 1027 | .long SYS_CODE64_SEL # selector 15:0\r |
| | 1028 | .byte 0 # 0 for interrupt gate\r |
| | 1029 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present\r |
| | 1030 | .word 0 # offset 31:16\r |
| | 1031 | .long 0 # offset 63:32\r |
| | 1032 | .long 0 # 0 for reserved\r |
| | 1033 | \r |
| | 1034 | # IRQ 11 - (INT 73h)\r |
| | 1035 | .equ IRQ11_SEL, .-IDT_BASE\r |
| | 1036 | .word 0 # offset 15:0\r |
| | 1037 | .long SYS_CODE64_SEL # selector 15:0\r |
| | 1038 | .byte 0 # 0 for interrupt gate\r |
| | 1039 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present\r |
| | 1040 | .word 0 # offset 31:16\r |
| | 1041 | .long 0 # offset 63:32\r |
| | 1042 | .long 0 # 0 for reserved\r |
| | 1043 | \r |
| | 1044 | # IRQ 12 (PS/2 mouse) - (INT 74h)\r |
| | 1045 | .equ IRQ12_SEL, .-IDT_BASE\r |
| | 1046 | .word 0 # offset 15:0\r |
| | 1047 | .long SYS_CODE64_SEL # selector 15:0\r |
| | 1048 | .byte 0 # 0 for interrupt gate\r |
| | 1049 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present\r |
| | 1050 | .word 0 # offset 31:16\r |
| | 1051 | .long 0 # offset 63:32\r |
| | 1052 | .long 0 # 0 for reserved\r |
| | 1053 | \r |
| | 1054 | # IRQ 13 (Floating point error) - (INT 75h)\r |
| | 1055 | .equ IRQ13_SEL, .-IDT_BASE\r |
| | 1056 | .word 0 # offset 15:0\r |
| | 1057 | .long SYS_CODE64_SEL # selector 15:0\r |
| | 1058 | .byte 0 # 0 for interrupt gate\r |
| | 1059 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present\r |
| | 1060 | .word 0 # offset 31:16\r |
| | 1061 | .long 0 # offset 63:32\r |
| | 1062 | .long 0 # 0 for reserved\r |
| | 1063 | \r |
| | 1064 | # IRQ 14 (Secondary IDE) - (INT 76h)\r |
| | 1065 | .equ IRQ14_SEL, .-IDT_BASE\r |
| | 1066 | .word 0 # offset 15:0\r |
| | 1067 | .long SYS_CODE64_SEL # selector 15:0\r |
| | 1068 | .byte 0 # 0 for interrupt gate\r |
| | 1069 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present\r |
| | 1070 | .word 0 # offset 31:16\r |
| | 1071 | .long 0 # offset 63:32\r |
| | 1072 | .long 0 # 0 for reserved\r |
| | 1073 | \r |
| | 1074 | # IRQ 15 (Primary IDE) - (INT 77h)\r |
| | 1075 | .equ IRQ15_SEL, .-IDT_BASE\r |
| | 1076 | .word 0 # offset 15:0\r |
| | 1077 | .long SYS_CODE64_SEL # selector 15:0\r |
| | 1078 | .byte 0 # 0 for interrupt gate\r |
| | 1079 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present\r |
| | 1080 | .word 0 # offset 31:16\r |
| | 1081 | .long 0 # offset 63:32\r |
| | 1082 | .long 0 # 0 for reserved\r |
| | 1083 | \r |
| | 1084 | IDT_END: \r |
| | 1085 | \r |
| | 1086 | .p2align 1\r |
| | 1087 | \r |
| | 1088 | MemoryMapSize: .long 0\r |
| | 1089 | MemoryMap: .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 | .long 0,0,0,0,0,0,0,0\r |
| | 1108 | .long 0,0,0,0,0,0,0,0\r |
| | 1109 | .long 0,0,0,0,0,0,0,0\r |
| | 1110 | .long 0,0,0,0,0,0,0,0\r |
| | 1111 | .long 0,0,0,0,0,0,0,0\r |
| | 1112 | .long 0,0,0,0,0,0,0,0\r |
| | 1113 | .long 0,0,0,0,0,0,0,0\r |
| | 1114 | .long 0,0,0,0,0,0,0,0\r |
| | 1115 | .long 0,0,0,0,0,0,0,0\r |
| | 1116 | .long 0,0,0,0,0,0,0,0\r |
| | 1117 | .long 0,0,0,0,0,0,0,0\r |
| | 1118 | .long 0,0,0,0,0,0,0,0\r |
| | 1119 | \r |
| | 1120 | .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 |
| | 1121 | \r |
| | 1122 | .org 0x0fe0\r |
| | 1123 | MyStack: \r |
| | 1124 | # below is the pieces of the IVT that is used to redirect INT 68h - 6fh\r |
| | 1125 | # back to INT 08h - 0fh when in real mode... It is 'org'ed to a\r |
| | 1126 | # known low address (20f00) so it can be set up by PlMapIrqToVect in\r |
| | 1127 | # 8259.c\r |
| | 1128 | \r |
| | 1129 | int $8\r |
| | 1130 | iret\r |
| | 1131 | \r |
| | 1132 | int $9\r |
| | 1133 | iret\r |
| | 1134 | \r |
| | 1135 | int $10\r |
| | 1136 | iret\r |
| | 1137 | \r |
| | 1138 | int $11\r |
| | 1139 | iret\r |
| | 1140 | \r |
| | 1141 | int $12\r |
| | 1142 | iret\r |
| | 1143 | \r |
| | 1144 | int $13\r |
| | 1145 | iret\r |
| | 1146 | \r |
| | 1147 | int $14\r |
| | 1148 | iret\r |
| | 1149 | \r |
| | 1150 | int $15\r |
| | 1151 | iret\r |
| | 1152 | \r |
| | 1153 | \r |
| | 1154 | .org 0x0ffe\r |
| | 1155 | BlockSignature: \r |
| | 1156 | .word 0xaa55\r |
| | 1157 | \r |
projects / mirror_edk2.git / blame_incremental