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f3eb2131 | 1 | #------------------------------------------------------------------------------\r |
2 | #*\r | |
3 | #* Copyright 2006 - 2007, Intel Corporation \r | |
4 | #* All rights reserved. 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 | #* 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 |