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e343d447 | 1 | #------------------------------------------------------------------------------ |
2 | #* | |
3 | #* Copyright 2006 - 2007, Intel Corporation | |
4 | #* All rights reserved. This program and the accompanying materials | |
5 | #* are licensed and made available under the terms and conditions of the BSD License | |
6 | #* which accompanies this distribution. The full text of the license may be found at | |
7 | #* http://opensource.org/licenses/bsd-license.php | |
8 | #* | |
9 | #* THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, | |
10 | #* WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. | |
11 | #* | |
12 | #* st32_64.asm | |
13 | #* | |
14 | #* Abstract: | |
15 | #* | |
16 | #------------------------------------------------------------------------------ | |
17 | ||
18 | ||
19 | .stack: | |
20 | .486p: | |
21 | .code16 | |
22 | ||
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 | |
28 | ||
29 | .org 0x0 | |
30 | Ia32Jump: | |
31 | jmp BootSectorEntryPoint # JMP inst - 3 bytes | |
32 | nop | |
33 | ||
34 | OemId: .ascii "INTEL " # OemId - 8 bytes\r | |
35 | SectorSize: .word 0 # Sector Size - 2 bytes\r | |
36 | SectorsPerCluster: .byte 0 # Sector Per Cluster - 1 byte\r | |
37 | ReservedSectors: .word 0 # Reserved Sectors - 2 bytes\r | |
38 | NoFats: .byte 0 # Number of FATs - 1 byte\r | |
39 | RootEntries: .word 0 # Root Entries - 2 bytes\r | |
40 | Sectors: .word 0 # Number of Sectors - 2 bytes\r | |
41 | Media: .byte 0 # Media - 1 byte\r | |
42 | SectorsPerFat16: .word 0 # Sectors Per FAT for FAT12/FAT16 - 2 byte\r | |
43 | SectorsPerTrack: .word 0 # Sectors Per Track - 2 bytes\r | |
44 | Heads: .word 0 # Heads - 2 bytes\r | |
45 | HiddenSectors: .long 0 # Hidden Sectors - 4 bytes\r | |
46 | LargeSectors: .long 0 # Large Sectors - 4 bytes\r | |
47 | \r | |
48 | #******************************************************************************\r | |
49 | #\r | |
50 | #The structure for FAT32 starting at offset 36 of the boot sector. (At this point, \r | |
51 | #the BPB/boot sector for FAT12 and FAT16 differs from the BPB/boot sector for FAT32.)\r | |
52 | #\r | |
53 | #******************************************************************************\r | |
54 | \r | |
55 | SectorsPerFat32: .long 0 # Sectors Per FAT for FAT32 - 4 bytes\r | |
56 | ExtFlags: .word 0 # Mirror Flag - 2 bytes\r | |
57 | FSVersion: .word 0 # File System Version - 2 bytes\r | |
58 | RootCluster: .long 0 # 1st Cluster Number of Root Dir - 4 bytes\r | |
59 | FSInfo: .word 0 # Sector Number of FSINFO - 2 bytes\r | |
60 | BkBootSector: .word 0 # Sector Number of Bk BootSector - 2 bytes\r | |
61 | Reserved: .fill 12,1,0 # Reserved Field - 12 bytes\r | |
62 | PhysicalDrive: .byte 0 # Physical Drive Number - 1 byte\r | |
63 | Reserved1: .byte 0 # Reserved Field - 1 byte\r | |
64 | Signature: .byte 0 # Extended Boot Signature - 1 byte\r | |
65 | VolId: .ascii " " # Volume Serial Number - 4 bytes\r | |
66 | FatLabel: .ascii " " # Volume Label - 11 bytes\r | |
67 | FileSystemType: .ascii "FAT32 " # File System Type - 8 bytes\r | |
68 | \r | |
69 | ||
70 | BootSectorEntryPoint: | |
71 | # ASSUME ds:@code | |
72 | # ASSUME ss:@code | |
73 | # ds = 1000, es = 2000 + x (size of first cluster >> 4) | |
74 | # cx = Start Cluster of EfiLdr | |
75 | # dx = Start Cluster of Efivar.bin | |
76 | ||
77 | # Re use the BPB data stored in Boot Sector | |
78 | movw $0x7c00,%bp | |
79 | ||
80 | pushw %cx | |
81 | # Read Efivar.bin | |
82 | # 1000:dx = DirectoryEntry of Efivar.bin -> BS.com has filled already | |
83 | movw $0x1900,%ax | |
84 | movw %ax,%es | |
85 | testw %dx,%dx | |
86 | jnz CheckVarStoreSize | |
87 | ||
88 | movb $1,%al | |
89 | NoVarStore: | |
90 | pushw %es | |
91 | # Set the 5th byte start @ 0:19000 to non-zero indicating we should init var store header in DxeIpl | |
92 | movb %al, %es:(4) | |
93 | jmp SaveVolumeId | |
94 | ||
95 | CheckVarStoreSize: | |
96 | movw %dx,%di | |
97 | cmpl $0x4000, %ds:2(%di) | |
98 | movb $2,%al | |
99 | jne NoVarStore | |
100 | ||
101 | LoadVarStore: | |
102 | movb $0,%al | |
103 | movb %al, %es:(4)\r | |
104 | movw (%di), %cx | |
105 | # ES:DI = 1500:0 | |
106 | xorw %di,%di | |
107 | pushw %es | |
108 | movw $0x1500,%ax | |
109 | movw %ax,%es | |
110 | call ReadFile | |
111 | SaveVolumeId: | |
112 | popw %es | |
113 | movw VolId(%bp), %ax\r | |
114 | movw %ax, %es:(0) # Save Volume Id to 0:19000. we will find the correct volume according to this VolumeId\r | |
115 | movw VolId+2(%bp), %ax\r | |
116 | movw %ax, %es:(2) | |
117 | ||
118 | # Read Efildr | |
119 | popw %cx | |
120 | # cx = Start Cluster of Efildr -> BS.com has filled already | |
121 | # ES:DI = 2000:0, first cluster will be read again | |
122 | xorw %di,%di # di = 0 | |
123 | movw $0x2000,%ax | |
124 | movw %ax,%es | |
125 | call ReadFile | |
126 | movw %cs,%ax | |
127 | movw %ax, %cs:JumpSegment | |
128 | ||
129 | CheckEm64T: | |
130 | movl $0x80000001,%eax | |
131 | # cpuid | |
132 | .word 0xA20F | |
133 | btl $29,%edx | |
134 | jc CheckEm64TPass | |
135 | pushw %cs | |
136 | popw %ds | |
137 | leaw Em64String,%si | |
138 | movw $18,%cx | |
139 | jmp PrintStringAndHalt | |
140 | CheckEm64TPass: | |
141 | jumpFarInstruction: | |
142 | .byte 0xea | |
143 | jumpOffset: | |
144 | .word 0x200 | |
145 | jumpSegment: | |
146 | .word 0x2000 | |
147 | ||
148 | ||
149 | ||
150 | # **************************************************************************** | |
151 | # ReadFile | |
152 | # | |
153 | # Arguments: | |
154 | # CX = Start Cluster of File | |
155 | # ES:DI = Buffer to store file content read from disk | |
156 | # | |
157 | # Return: | |
158 | # (ES << 4 + DI) = end of file content Buffer | |
159 | # | |
160 | # **************************************************************************** | |
161 | ReadFile: | |
162 | # si = NumberOfClusters | |
163 | # cx = ClusterNumber | |
164 | # dx = CachedFatSectorNumber | |
165 | # ds:0000 = CacheFatSectorBuffer | |
166 | # es:di = Buffer to load file | |
167 | # bx = NextClusterNumber | |
168 | pusha | |
169 | movw $1,%si # NumberOfClusters = 1 | |
170 | pushw %cx # Push Start Cluster onto stack | |
171 | movw $0xfff,%dx # CachedFatSectorNumber = 0xfff | |
172 | FatChainLoop: | |
173 | movw %cx,%ax # ax = ClusterNumber | |
174 | andw $0xfff8,%ax # ax = ax & 0xfff8 | |
175 | cmpw $0xfff8,%ax # See if this is the last cluster | |
176 | je FoundLastCluster # Jump if last cluster found | |
177 | movw %cx,%ax # ax = ClusterNumber | |
178 | shlw $2, %ax # FatOffset = ClusterNumber * 2 | |
179 | pushw %si # Save si | |
180 | movw %ax,%si # si = FatOffset | |
181 | shrw $BLOCK_SHIFT, %ax # ax = FatOffset >> BLOCK_SHIFT | |
182 | addw ReservedSectors(%bp), %ax # ax = FatSectorNumber = ReservedSectors + (FatOffset >> BLOCK_OFFSET) | |
183 | andw $BLOCK_MASK, %si # si = FatOffset & BLOCK_MASK | |
184 | cmpw %dx,%ax # Compare FatSectorNumber to CachedFatSectorNumber | |
185 | je SkipFatRead | |
186 | movw $2,%bx | |
187 | pushw %es | |
188 | pushw %ds | |
189 | popw %es | |
190 | call ReadBlocks # Read 2 blocks starting at AX storing at ES:DI | |
191 | popw %es | |
192 | movw %ax,%dx # CachedFatSectorNumber = FatSectorNumber | |
193 | SkipFatRead: | |
194 | movw (%si), %bx # bx = NextClusterNumber | |
195 | movw %cx,%ax # ax = ClusterNumber | |
196 | popw %si # Restore si | |
197 | decw %bx # bx = NextClusterNumber - 1 | |
198 | cmpw %cx,%bx # See if (NextClusterNumber-1)==ClusterNumber | |
199 | jne ReadClusters | |
200 | incw %bx # bx = NextClusterNumber | |
201 | incw %si # NumberOfClusters++ | |
202 | movw %bx,%cx # ClusterNumber = NextClusterNumber | |
203 | jmp FatChainLoop | |
204 | ReadClusters: | |
205 | incw %bx | |
206 | popw %ax # ax = StartCluster | |
207 | pushw %bx # StartCluster = NextClusterNumber | |
208 | movw %bx,%cx # ClusterNumber = NextClusterNumber | |
209 | subw $2,%ax # ax = StartCluster - 2 | |
210 | xorb %bh,%bh | |
211 | movb SectorsPerCluster(%bp), %bl # bx = SectorsPerCluster | |
212 | mulw %bx # ax = (StartCluster - 2) * SectorsPerCluster | |
213 | addw (%bp), %ax # ax = FirstClusterLBA + (StartCluster-2)*SectorsPerCluster | |
214 | pushw %ax # save start sector | |
215 | movw %si,%ax # ax = NumberOfClusters | |
216 | mulw %bx # ax = NumberOfClusters * SectorsPerCluster | |
217 | movw %ax,%bx # bx = Number of Sectors | |
218 | popw %ax # ax = Start Sector | |
219 | call ReadBlocks | |
220 | movw $1,%si # NumberOfClusters = 1 | |
221 | jmp FatChainLoop | |
222 | FoundLastCluster: | |
223 | popw %cx | |
224 | popa | |
225 | ret | |
226 | ||
227 | ||
228 | # **************************************************************************** | |
229 | # ReadBlocks - Reads a set of blocks from a block device | |
230 | # | |
231 | # AX = Start LBA | |
232 | # BX = Number of Blocks to Read | |
233 | # ES:DI = Buffer to store sectors read from disk | |
234 | # **************************************************************************** | |
235 | ||
236 | # cx = Blocks | |
237 | # bx = NumberOfBlocks | |
238 | # si = StartLBA | |
239 | ||
240 | ReadBlocks: | |
241 | pusha | |
242 | addl LBAOffsetForBootSector(%bp), %eax # Add LBAOffsetForBootSector to Start LBA\r | |
243 | addl HiddenSectors(%bp), %eax # Add HiddenSectors to Start LBA | |
244 | movl %eax,%esi # esi = Start LBA | |
245 | movw %bx,%cx # cx = Number of blocks to read | |
246 | ReadCylinderLoop: | |
247 | movw $0x7bfc,%bp # bp = 0x7bfc | |
248 | movl %esi,%eax # eax = Start LBA | |
249 | xorl %edx,%edx # edx = 0 | |
250 | movzwl (%bp), %ebx # bx = MaxSector | |
251 | divl %ebx # ax = StartLBA / MaxSector | |
252 | incw %dx # dx = (StartLBA % MaxSector) + 1 | |
253 | ||
254 | movw (%bp), %bx # bx = MaxSector | |
255 | subw %dx,%bx # bx = MaxSector - Sector | |
256 | incw %bx # bx = MaxSector - Sector + 1 | |
257 | cmpw %bx,%cx # Compare (Blocks) to (MaxSector - Sector + 1) | |
258 | jg LimitTransfer | |
259 | movw %cx,%bx # bx = Blocks | |
260 | LimitTransfer: | |
261 | pushw %ax # save ax | |
262 | movw %es,%ax # ax = es | |
263 | shrw $(BLOCK_SHIFT-4), %ax # ax = Number of blocks into mem system | |
264 | andw $0x7f,%ax # ax = Number of blocks into current seg | |
265 | addw %bx,%ax # ax = End Block number of transfer | |
266 | cmpw $0x80,%ax # See if it crosses a 64K boundry | |
267 | jle NotCrossing64KBoundry # Branch if not crossing 64K boundry | |
268 | subw $0x80,%ax # ax = Number of blocks past 64K boundry | |
269 | subw %ax,%bx # Decrease transfer size by block overage | |
270 | NotCrossing64KBoundry: | |
271 | popw %ax # restore ax | |
272 | ||
273 | pushw %cx | |
274 | movb %dl,%cl # cl = (StartLBA % MaxSector) + 1 = Sector | |
275 | xorw %dx,%dx # dx = 0 | |
276 | divw 2(%bp) # ax = ax / (MaxHead + 1) = Cylinder \r | |
277 | # dx = ax % (MaxHead + 1) = Head | |
278 | ||
279 | pushw %bx # Save number of blocks to transfer | |
280 | movb %dl,%dh # dh = Head | |
281 | movw $0x7c00,%bp # bp = 0x7c00 | |
282 | movb PhysicalDrive(%bp), %dl # dl = Drive Number | |
283 | movb %al,%ch # ch = Cylinder | |
284 | movb %bl,%al # al = Blocks | |
285 | movb $2,%ah # ah = Function 2 | |
286 | movw %di,%bx # es:bx = Buffer address | |
287 | int $0x13 | |
288 | jc DiskError | |
289 | popw %bx | |
290 | popw %cx | |
291 | movzwl %bx,%ebx | |
292 | addl %ebx,%esi # StartLBA = StartLBA + NumberOfBlocks | |
293 | subw %bx,%cx # Blocks = Blocks - NumberOfBlocks | |
294 | movw %es,%ax | |
295 | shlw $(BLOCK_SHIFT-4), %bx | |
296 | addw %bx,%ax | |
297 | movw %ax,%es # es:di = es:di + NumberOfBlocks*BLOCK_SIZE | |
298 | cmpw $0,%cx | |
299 | jne ReadCylinderLoop | |
300 | popa | |
301 | ret | |
302 | ||
303 | DiskError: | |
304 | pushw %cs | |
305 | popw %ds | |
306 | leaw ErrorString,%si | |
307 | movw $7,%cx | |
308 | jmp PrintStringAndHalt | |
309 | ||
310 | PrintStringAndHalt: | |
311 | movw $0xb800,%ax | |
312 | movw %ax,%es | |
313 | movw $160,%di | |
314 | rep | |
315 | movsw | |
316 | Halt: | |
317 | jmp Halt | |
318 | ||
319 | ErrorString: \r | |
320 | .byte 'S', 0x0c, 'E', 0x0c, 'r', 0x0c, 'r', 0x0c, 'o', 0x0c, 'r', 0x0c, '!',0x0c | |
321 | ||
322 | .org 0x01fa | |
323 | LBAOffsetForBootSector: | |
324 | .long 0x0 | |
325 | ||
326 | .org 0x01fe | |
327 | .word 0xaa55 | |
328 | ||
329 | #****************************************************************************** | |
330 | #****************************************************************************** | |
331 | #****************************************************************************** | |
332 | ||
333 | .equ DELAY_PORT, 0x0ed # Port to use for 1uS delay | |
334 | .equ KBD_CONTROL_PORT, 0x060 # 8042 control port | |
335 | .equ KBD_STATUS_PORT, 0x064 # 8042 status port | |
336 | .equ WRITE_DATA_PORT_CMD, 0x0d1 # 8042 command to write the data port | |
337 | .equ ENABLE_A20_CMD, 0x0df # 8042 command to enable A20 | |
338 | ||
339 | .org 0x200 | |
340 | jmp start | |
341 | Em64String: | |
342 | .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 | |
343 | ||
344 | start: | |
345 | movw %cs,%ax | |
346 | movw %ax,%ds | |
347 | movw %ax,%es | |
348 | movw %ax,%ss | |
349 | movw $MyStack, %sp | |
350 | ||
351 | # mov ax,0b800h | |
352 | # mov es,ax | |
353 | # mov byte ptr es:[160],'a' | |
354 | # mov ax,cs | |
355 | # mov es,ax | |
356 | ||
357 | movl $0,%ebx | |
358 | leal MemoryMap, %edi | |
359 | MemMapLoop: | |
360 | movl $0xe820,%eax | |
361 | movl $20,%ecx | |
362 | movl $0x534d4150, %edx # SMAP | |
363 | int $0x15 | |
364 | jc MemMapDone | |
365 | addl $20,%edi | |
366 | cmpl $0,%ebx | |
367 | je MemMapDone | |
368 | jmp MemMapLoop | |
369 | MemMapDone: | |
370 | leal MemoryMap, %eax | |
371 | subl %eax,%edi # Get the address of the memory map | |
372 | movl %edi, MemoryMapSize # Save the size of the memory map | |
373 | ||
374 | xorl %ebx,%ebx | |
375 | movw %cs,%bx # BX=segment | |
376 | shll $4,%ebx # BX="linear" address of segment base | |
377 | leal GDT_BASE(%ebx), %eax # EAX=PHYSICAL address of gdt\r | |
378 | movl %eax, (gdtr + 2) # Put address of gdt into the gdtr\r | |
379 | leal IDT_BASE(%ebx), %eax # EAX=PHYSICAL address of idt\r | |
380 | movl %eax, (idtr + 2) # Put address of idt into the idtr\r | |
381 | leal MemoryMapSize(%ebx), %edx # Physical base address of the memory map | |
382 | ||
383 | # mov ax,0b800h | |
384 | # mov es,ax | |
385 | # mov byte ptr es:[162],'b' | |
386 | # mov ax,cs | |
387 | # mov es,ax | |
388 | ||
389 | # | |
390 | # Enable A20 Gate | |
391 | # | |
392 | ||
393 | movw $0x2401,%ax # Enable A20 Gate | |
394 | int $0x15 | |
395 | jnc A20GateEnabled # Jump if it suceeded | |
396 | ||
397 | # | |
398 | # If INT 15 Function 2401 is not supported, then attempt to Enable A20 manually. | |
399 | # | |
400 | ||
401 | call Empty8042InputBuffer # Empty the Input Buffer on the 8042 controller | |
402 | jnz Timeout8042 # Jump if the 8042 timed out | |
403 | outw %ax, $DELAY_PORT # Delay 1 uS | |
404 | movb $WRITE_DATA_PORT_CMD, %al # 8042 cmd to write output port | |
405 | outb %al, $KBD_STATUS_PORT # Send command to the 8042 | |
406 | call Empty8042InputBuffer # Empty the Input Buffer on the 8042 controller | |
407 | jnz Timeout8042 # Jump if the 8042 timed out | |
408 | movb $ENABLE_A20_CMD, %al # gate address bit 20 on | |
409 | outb %al, $KBD_CONTROL_PORT # Send command to thre 8042 | |
410 | call Empty8042InputBuffer # Empty the Input Buffer on the 8042 controller | |
411 | movw $25,%cx # Delay 25 uS for the command to complete on the 8042 | |
412 | Delay25uS: | |
413 | outw %ax, $DELAY_PORT # Delay 1 uS | |
414 | loop Delay25uS | |
415 | Timeout8042: | |
416 | ||
417 | ||
418 | A20GateEnabled: | |
419 | ||
420 | # | |
421 | # DISABLE INTERRUPTS - Entering Protected Mode | |
422 | # | |
423 | ||
424 | cli | |
425 | ||
426 | # mov ax,0b800h | |
427 | # mov es,ax | |
428 | # mov byte ptr es:[164],'c' | |
429 | # mov ax,cs | |
430 | # mov es,ax | |
431 | ||
432 | leal OffsetIn32BitProtectedMode, %eax | |
433 | addl $0x20000+0x6,%eax | |
434 | movl %eax, OffsetIn32BitProtectedMode | |
435 | ||
436 | leal OffsetInLongMode, %eax | |
437 | addl $0x20000+0x6,%eax | |
438 | movl %eax, OffsetInLongMode | |
439 | ||
440 | # | |
441 | # load GDT | |
442 | # | |
443 | .byte 0x66 | |
444 | lgdt gdtr | |
445 | ||
446 | # | |
447 | # Enable Protect Mode (set CR0.PE=1) | |
448 | # | |
449 | movl $cr0, %eax # Read CR0. | |
450 | orl $0x1,%eax # Set PE=1 | |
451 | movl %eax, %cr0 # Write CR0. | |
452 | .byte 0x66 | |
453 | .byte 0xea # jmp far 16:32 | |
454 | OffsetIn32BitProtectedMode: | |
455 | .long 0x0000000 # offset $+8 (In32BitProtectedMode) | |
456 | .word 0x10 # selector (flat CS) | |
457 | In32BitProtectedMode: | |
458 | ||
459 | # | |
460 | # Entering Long Mode | |
461 | # | |
462 | .byte 0x66 | |
463 | movw $8,%ax | |
464 | movw %ax,%ds | |
465 | movw %ax,%es | |
466 | movw %ax,%ss | |
467 | ||
468 | # | |
469 | # Enable the 64-bit page-translation-table entries by | |
470 | # setting CR4.PAE=1 (this is _required_ before activating | |
471 | # long mode). Paging is not enabled until after long mode | |
472 | # is enabled. | |
473 | # | |
474 | .byte 0xf | |
475 | .byte 0x20 | |
476 | .byte 0xe0 | |
477 | # mov eax, cr4 | |
478 | btsl $5,%eax | |
479 | .byte 0xf | |
480 | .byte 0x22 | |
481 | .byte 0xe0 | |
482 | # mov cr4, eax | |
483 | ||
484 | # | |
485 | # This is the Trapolean Page Tables that are guarenteed | |
486 | # under 4GB. | |
487 | # | |
488 | # Address Map: | |
489 | # 10000 ~ 12000 - efildr (loaded) | |
490 | # 20000 ~ 21000 - start64.com | |
491 | # 21000 ~ 22000 - efi64.com | |
492 | # 22000 ~ 90000 - efildr | |
493 | # 90000 ~ 96000 - 4G pagetable (will be reload later) | |
494 | # | |
495 | .byte 0xb8 | |
496 | .long 0x90000 | |
497 | # mov eax, 90000h | |
498 | movl %eax, %cr3 | |
499 | ||
500 | # | |
501 | # Enable long mode (set EFER.LME=1). | |
502 | # | |
503 | .byte 0xb9 | |
504 | .long 0xc0000080 | |
505 | # mov ecx, 0c0000080h ; EFER MSR number. | |
506 | .byte 0xf | |
507 | .byte 0x32 | |
508 | # rdmsr ; Read EFER. | |
509 | .byte 0xf | |
510 | .byte 0xba | |
511 | .byte 0xe8 | |
512 | .byte 0x8 | |
513 | # bts eax, 8 ; Set LME=1. | |
514 | .byte 0xf | |
515 | .byte 0x30 | |
516 | # wrmsr ; Write EFER. | |
517 | ||
518 | # | |
519 | # Enable paging to activate long mode (set CR0.PG=1) | |
520 | # | |
521 | movl $cr0, %eax # Read CR0. | |
522 | .byte 0xf | |
523 | .byte 0xba | |
524 | .byte 0xe8 | |
525 | .byte 0x1f | |
526 | # bts eax, 31 ; Set PG=1. | |
527 | movl %eax, %cr0 # Write CR0. | |
528 | jmp GoToLongMode | |
529 | GoToLongMode: | |
530 | ||
531 | .byte 0x67 | |
532 | .byte 0xea # Far Jump $+9:Selector to reload CS | |
533 | OffsetInLongMode: | |
534 | .long 00000000 # $+9 Offset is ensuing instruction boundary | |
535 | .word 0x38 # Selector is our code selector, 38h | |
536 | ||
537 | InLongMode: | |
538 | .byte 0x66 | |
539 | movw $0x30,%ax | |
540 | movw %ax,%ds | |
541 | ||
542 | .byte 0x66 | |
543 | movw $0x18,%ax | |
544 | movw %ax,%es | |
545 | movw %ax,%ss | |
546 | movw %ax,%ds | |
547 | ||
548 | .byte 0xbd | |
549 | .long 0x400000 | |
550 | # mov ebp,000400000h ; Destination of EFILDR32 | |
551 | .byte 0xbb | |
552 | .long 0x70000 | |
553 | # mov ebx,000070000h ; Length of copy | |
554 | ||
555 | # | |
556 | # load idt later | |
557 | # | |
558 | .byte 0x48 | |
559 | .byte 0x33 | |
560 | .byte 0xc0 | |
561 | # xor rax, rax | |
562 | .byte 0x66 | |
563 | movw $idtr, %ax | |
564 | .byte 0x48 | |
565 | .byte 0x5 | |
566 | .long 0x20000 | |
567 | # add rax, 20000h | |
568 | ||
569 | .byte 0xf | |
570 | .byte 0x1 | |
571 | .byte 0x18 | |
572 | # lidt fword ptr [rax] | |
573 | ||
574 | .byte 0x48 | |
575 | .byte 0xc7 | |
576 | .byte 0xc0 | |
577 | .long 0x21000 | |
578 | # mov rax, 21000h | |
579 | .byte 0x50 | |
580 | # push rax | |
581 | ||
582 | # ret | |
583 | .byte 0xc3 | |
584 | ||
585 | Empty8042InputBuffer: | |
586 | movw $0,%cx | |
587 | Empty8042Loop: | |
588 | outw %ax, $DELAY_PORT # Delay 1us | |
589 | inb $KBD_STATUS_PORT, %al # Read the 8042 Status Port | |
590 | andb $0x2,%al # Check the Input Buffer Full Flag | |
591 | loopnz Empty8042Loop # Loop until the input buffer is empty or a timout of 65536 uS | |
592 | ret | |
593 | ||
594 | ############################################################################## | |
595 | # data | |
596 | ############################################################################## | |
597 | ||
598 | .align 0x2 | |
599 | ||
600 | gdtr: .long GDT_END - GDT_BASE - 1 # GDT limit | |
601 | .long 0 # (GDT base gets set above) | |
602 | ############################################################################## | |
603 | # global descriptor table (GDT) | |
604 | ############################################################################## | |
605 | ||
606 | .align 0x2 | |
607 | ||
608 | GDT_BASE: | |
609 | # null descriptor | |
610 | .equ NULL_SEL, .-GDT_BASE # Selector [0x0] | |
611 | .word 0 # limit 15:0 | |
612 | .word 0 # base 15:0 | |
613 | .byte 0 # base 23:16 | |
614 | .byte 0 # type | |
615 | .byte 0 # limit 19:16, flags | |
616 | .byte 0 # base 31:24 | |
617 | ||
618 | # linear data segment descriptor | |
619 | .equ LINEAR_SEL, .-GDT_BASE # Selector [0x8] | |
620 | .word 0xFFFF # limit 0xFFFFF | |
621 | .word 0 # base 0 | |
622 | .byte 0 | |
623 | .byte 0x92 # present, ring 0, data, expand-up, writable | |
624 | .byte 0xCF # page-granular, 32-bit | |
625 | .byte 0 | |
626 | ||
627 | # linear code segment descriptor | |
628 | .equ LINEAR_CODE_SEL, .-GDT_BASE # Selector [0x10] | |
629 | .word 0xFFFF # limit 0xFFFFF | |
630 | .word 0 # base 0 | |
631 | .byte 0 | |
632 | .byte 0x9A # present, ring 0, data, expand-up, writable | |
633 | .byte 0xCF # page-granular, 32-bit | |
634 | .byte 0 | |
635 | ||
636 | # system data segment descriptor | |
637 | .equ SYS_DATA_SEL, .-GDT_BASE # Selector [0x18] | |
638 | .word 0xFFFF # limit 0xFFFFF | |
639 | .word 0 # base 0 | |
640 | .byte 0 | |
641 | .byte 0x92 # present, ring 0, data, expand-up, writable | |
642 | .byte 0xCF # page-granular, 32-bit | |
643 | .byte 0 | |
644 | ||
645 | # system code segment descriptor | |
646 | .equ SYS_CODE_SEL, .-GDT_BASE # Selector [0x20] | |
647 | .word 0xFFFF # limit 0xFFFFF | |
648 | .word 0 # base 0 | |
649 | .byte 0 | |
650 | .byte 0x9A # present, ring 0, data, expand-up, writable | |
651 | .byte 0xCF # page-granular, 32-bit | |
652 | .byte 0 | |
653 | ||
654 | # spare segment descriptor | |
655 | .equ SPARE3_SEL, .-GDT_BASE # Selector [0x28] | |
656 | .word 0 # limit 0xFFFFF | |
657 | .word 0 # base 0 | |
658 | .byte 0 | |
659 | .byte 0 # present, ring 0, data, expand-up, writable | |
660 | .byte 0 # page-granular, 32-bit | |
661 | .byte 0 | |
662 | ||
663 | # | |
664 | # system data segment descriptor | |
665 | # | |
666 | .equ SYS_DATA64_SEL, .-GDT_BASE # Selector [0x30] | |
667 | .word 0xFFFF # limit 0xFFFFF | |
668 | .word 0 # base 0 | |
669 | .byte 0 | |
670 | .byte 0x92 # P | DPL [1..2] | 1 | 1 | C | R | A | |
671 | .byte 0xCF # G | D | L | AVL | Segment [19..16] | |
672 | .byte 0 | |
673 | ||
674 | # | |
675 | # system code segment descriptor | |
676 | # | |
677 | .equ SYS_CODE64_SEL, .-GDT_BASE # Selector [0x38] | |
678 | .word 0xFFFF # limit 0xFFFFF | |
679 | .word 0 # base 0 | |
680 | .byte 0 | |
681 | .byte 0x9A # P | DPL [1..2] | 1 | 1 | C | R | A | |
682 | .byte 0xAF # G | D | L | AVL | Segment [19..16] | |
683 | .byte 0 | |
684 | ||
685 | # spare segment descriptor | |
686 | .equ SPARE4_SEL, .-GDT_BASE # Selector [0x40] | |
687 | .word 0 # limit 0xFFFFF | |
688 | .word 0 # base 0 | |
689 | .byte 0 | |
690 | .byte 0 # present, ring 0, data, expand-up, writable | |
691 | .byte 0 # page-granular, 32-bit | |
692 | .byte 0 | |
693 | ||
694 | GDT_END: | |
695 | ||
696 | .align 0x2 | |
697 | ||
698 | ||
699 | ||
700 | idtr: .long IDT_END - IDT_BASE - 1 # IDT limit | |
701 | .quad 0 # (IDT base gets set above) | |
702 | ||
703 | ############################################################################## | |
704 | # interrupt descriptor table (IDT) | |
705 | # | |
706 | # Note: The hardware IRQ's specified in this table are the normal PC/AT IRQ | |
707 | # mappings. This implementation only uses the system timer and all other | |
708 | # IRQs will remain masked. The descriptors for vectors 33+ are provided | |
709 | # for convenience. | |
710 | ############################################################################## | |
711 | ||
712 | #idt_tag db "IDT",0 | |
713 | .align 0x2 | |
714 | ||
715 | ||
716 | IDT_BASE: | |
717 | # divide by zero (INT 0) | |
718 | .equ DIV_ZERO_SEL, .-IDT_BASE | |
719 | .word 0 # offset 15:0 | |
720 | .long SYS_CODE64_SEL # selector 15:0 | |
721 | .byte 0 # 0 for interrupt gate | |
722 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present | |
723 | .word 0 # offset 31:16 | |
724 | .long 0 # offset 63:32 | |
725 | .long 0 # 0 for reserved | |
726 | ||
727 | # debug exception (INT 1) | |
728 | .equ DEBUG_EXCEPT_SEL, .-IDT_BASE | |
729 | .word 0 # offset 15:0 | |
730 | .long SYS_CODE64_SEL # selector 15:0 | |
731 | .byte 0 # 0 for interrupt gate | |
732 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present | |
733 | .word 0 # offset 31:16 | |
734 | .long 0 # offset 63:32 | |
735 | .long 0 # 0 for reserved | |
736 | ||
737 | # NMI (INT 2) | |
738 | .equ NMI_SEL, .-IDT_BASE | |
739 | .word 0 # offset 15:0 | |
740 | .long SYS_CODE64_SEL # selector 15:0 | |
741 | .byte 0 # 0 for interrupt gate | |
742 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present | |
743 | .word 0 # offset 31:16 | |
744 | .long 0 # offset 63:32 | |
745 | .long 0 # 0 for reserved | |
746 | ||
747 | # soft breakpoint (INT 3) | |
748 | .equ BREAKPOINT_SEL, .-IDT_BASE | |
749 | .word 0 # offset 15:0 | |
750 | .long SYS_CODE64_SEL # selector 15:0 | |
751 | .byte 0 # 0 for interrupt gate | |
752 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present | |
753 | .word 0 # offset 31:16 | |
754 | .long 0 # offset 63:32 | |
755 | .long 0 # 0 for reserved | |
756 | ||
757 | # overflow (INT 4) | |
758 | .equ OVERFLOW_SEL, .-IDT_BASE | |
759 | .word 0 # offset 15:0 | |
760 | .long SYS_CODE64_SEL # selector 15:0 | |
761 | .byte 0 # 0 for interrupt gate | |
762 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present | |
763 | .word 0 # offset 31:16 | |
764 | .long 0 # offset 63:32 | |
765 | .long 0 # 0 for reserved | |
766 | ||
767 | # bounds check (INT 5) | |
768 | .equ BOUNDS_CHECK_SEL, .-IDT_BASE | |
769 | .word 0 # offset 15:0 | |
770 | .long SYS_CODE64_SEL # selector 15:0 | |
771 | .byte 0 # 0 for interrupt gate | |
772 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present | |
773 | .word 0 # offset 31:16 | |
774 | .long 0 # offset 63:32 | |
775 | .long 0 # 0 for reserved | |
776 | ||
777 | # invalid opcode (INT 6) | |
778 | .equ INVALID_OPCODE_SEL, .-IDT_BASE | |
779 | .word 0 # offset 15:0 | |
780 | .long SYS_CODE64_SEL # selector 15:0 | |
781 | .byte 0 # 0 for interrupt gate | |
782 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present | |
783 | .word 0 # offset 31:16 | |
784 | .long 0 # offset 63:32 | |
785 | .long 0 # 0 for reserved | |
786 | ||
787 | # device not available (INT 7) | |
788 | .equ DEV_NOT_AVAIL_SEL, .-IDT_BASE | |
789 | .word 0 # offset 15:0 | |
790 | .long SYS_CODE64_SEL # selector 15:0 | |
791 | .byte 0 # 0 for interrupt gate | |
792 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present | |
793 | .word 0 # offset 31:16 | |
794 | .long 0 # offset 63:32 | |
795 | .long 0 # 0 for reserved | |
796 | ||
797 | # double fault (INT 8) | |
798 | .equ DOUBLE_FAULT_SEL, .-IDT_BASE | |
799 | .word 0 # offset 15:0 | |
800 | .long SYS_CODE64_SEL # selector 15:0 | |
801 | .byte 0 # 0 for interrupt gate | |
802 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present | |
803 | .word 0 # offset 31:16 | |
804 | .long 0 # offset 63:32 | |
805 | .long 0 # 0 for reserved | |
806 | ||
807 | # Coprocessor segment overrun - reserved (INT 9) | |
808 | .equ RSVD_INTR_SEL1, .-IDT_BASE | |
809 | .word 0 # offset 15:0 | |
810 | .long SYS_CODE64_SEL # selector 15:0 | |
811 | .byte 0 # 0 for interrupt gate | |
812 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present | |
813 | .word 0 # offset 31:16 | |
814 | .long 0 # offset 63:32 | |
815 | .long 0 # 0 for reserved | |
816 | ||
817 | # invalid TSS (INT 0ah) | |
818 | .equ INVALID_TSS_SEL, .-IDT_BASE | |
819 | .word 0 # offset 15:0 | |
820 | .long SYS_CODE64_SEL # selector 15:0 | |
821 | .byte 0 # 0 for interrupt gate | |
822 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present | |
823 | .word 0 # offset 31:16 | |
824 | .long 0 # offset 63:32 | |
825 | .long 0 # 0 for reserved | |
826 | ||
827 | # segment not present (INT 0bh) | |
828 | .equ SEG_NOT_PRESENT_SEL, .-IDT_BASE | |
829 | .word 0 # offset 15:0 | |
830 | .long SYS_CODE64_SEL # selector 15:0 | |
831 | .byte 0 # 0 for interrupt gate | |
832 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present | |
833 | .word 0 # offset 31:16 | |
834 | .long 0 # offset 63:32 | |
835 | .long 0 # 0 for reserved | |
836 | ||
837 | # stack fault (INT 0ch) | |
838 | .equ STACK_FAULT_SEL, .-IDT_BASE | |
839 | .word 0 # offset 15:0 | |
840 | .long SYS_CODE64_SEL # selector 15:0 | |
841 | .byte 0 # 0 for interrupt gate | |
842 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present | |
843 | .word 0 # offset 31:16 | |
844 | .long 0 # offset 63:32 | |
845 | .long 0 # 0 for reserved | |
846 | ||
847 | # general protection (INT 0dh) | |
848 | .equ GP_FAULT_SEL, .-IDT_BASE | |
849 | .word 0 # offset 15:0 | |
850 | .long SYS_CODE64_SEL # selector 15:0 | |
851 | .byte 0 # 0 for interrupt gate | |
852 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present | |
853 | .word 0 # offset 31:16 | |
854 | .long 0 # offset 63:32 | |
855 | .long 0 # 0 for reserved | |
856 | ||
857 | # page fault (INT 0eh) | |
858 | .equ PAGE_FAULT_SEL, .-IDT_BASE | |
859 | .word 0 # offset 15:0 | |
860 | .long SYS_CODE64_SEL # selector 15:0 | |
861 | .byte 0 # 0 for interrupt gate | |
862 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present | |
863 | .word 0 # offset 31:16 | |
864 | .long 0 # offset 63:32 | |
865 | .long 0 # 0 for reserved | |
866 | ||
867 | # Intel reserved - do not use (INT 0fh) | |
868 | .equ RSVD_INTR_SEL2, .-IDT_BASE | |
869 | .word 0 # offset 15:0 | |
870 | .long SYS_CODE64_SEL # selector 15:0 | |
871 | .byte 0 # 0 for interrupt gate | |
872 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present | |
873 | .word 0 # offset 31:16 | |
874 | .long 0 # offset 63:32 | |
875 | .long 0 # 0 for reserved | |
876 | ||
877 | # floating point error (INT 10h) | |
878 | .equ FLT_POINT_ERR_SEL, .-IDT_BASE | |
879 | .word 0 # offset 15:0 | |
880 | .long SYS_CODE64_SEL # selector 15:0 | |
881 | .byte 0 # 0 for interrupt gate | |
882 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present | |
883 | .word 0 # offset 31:16 | |
884 | .long 0 # offset 63:32 | |
885 | .long 0 # 0 for reserved | |
886 | ||
887 | # alignment check (INT 11h) | |
888 | .equ ALIGNMENT_CHECK_SEL, .-IDT_BASE | |
889 | .word 0 # offset 15:0 | |
890 | .long SYS_CODE64_SEL # selector 15:0 | |
891 | .byte 0 # 0 for interrupt gate | |
892 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present | |
893 | .word 0 # offset 31:16 | |
894 | .long 0 # offset 63:32 | |
895 | .long 0 # 0 for reserved | |
896 | ||
897 | # machine check (INT 12h) | |
898 | .equ MACHINE_CHECK_SEL, .-IDT_BASE | |
899 | .word 0 # offset 15:0 | |
900 | .long SYS_CODE64_SEL # selector 15:0 | |
901 | .byte 0 # 0 for interrupt gate | |
902 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present | |
903 | .word 0 # offset 31:16 | |
904 | .long 0 # offset 63:32 | |
905 | .long 0 # 0 for reserved | |
906 | ||
907 | # SIMD floating-point exception (INT 13h) | |
908 | .equ SIMD_EXCEPTION_SEL, .-IDT_BASE | |
909 | .word 0 # offset 15:0 | |
910 | .long SYS_CODE64_SEL # selector 15:0 | |
911 | .byte 0 # 0 for interrupt gate | |
912 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present | |
913 | .word 0 # offset 31:16 | |
914 | .long 0 # offset 63:32 | |
915 | .long 0 # 0 for reserved | |
916 | ||
917 | # 85 unspecified descriptors, First 12 of them are reserved, the rest are avail | |
918 | .fill 85 * 16, 1, 0 # db (85 * 16) dup(0) | |
919 | ||
920 | # IRQ 0 (System timer) - (INT 68h) | |
921 | .equ IRQ0_SEL, .-IDT_BASE | |
922 | .word 0 # offset 15:0 | |
923 | .long SYS_CODE64_SEL # selector 15:0 | |
924 | .byte 0 # 0 for interrupt gate | |
925 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present | |
926 | .word 0 # offset 31:16 | |
927 | .long 0 # offset 63:32 | |
928 | .long 0 # 0 for reserved | |
929 | ||
930 | # IRQ 1 (8042 Keyboard controller) - (INT 69h) | |
931 | .equ IRQ1_SEL, .-IDT_BASE | |
932 | .word 0 # offset 15:0 | |
933 | .long SYS_CODE64_SEL # selector 15:0 | |
934 | .byte 0 # 0 for interrupt gate | |
935 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present | |
936 | .word 0 # offset 31:16 | |
937 | .long 0 # offset 63:32 | |
938 | .long 0 # 0 for reserved | |
939 | ||
940 | # Reserved - IRQ 2 redirect (IRQ 2) - DO NOT USE!!! - (INT 6ah) | |
941 | .equ IRQ2_SEL, .-IDT_BASE | |
942 | .word 0 # offset 15:0 | |
943 | .long SYS_CODE64_SEL # selector 15:0 | |
944 | .byte 0 # 0 for interrupt gate | |
945 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present | |
946 | .word 0 # offset 31:16 | |
947 | .long 0 # offset 63:32 | |
948 | .long 0 # 0 for reserved | |
949 | ||
950 | # IRQ 3 (COM 2) - (INT 6bh) | |
951 | .equ IRQ3_SEL, .-IDT_BASE | |
952 | .word 0 # offset 15:0 | |
953 | .long SYS_CODE64_SEL # selector 15:0 | |
954 | .byte 0 # 0 for interrupt gate | |
955 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present | |
956 | .word 0 # offset 31:16 | |
957 | .long 0 # offset 63:32 | |
958 | .long 0 # 0 for reserved | |
959 | ||
960 | # IRQ 4 (COM 1) - (INT 6ch) | |
961 | .equ IRQ4_SEL, .-IDT_BASE | |
962 | .word 0 # offset 15:0 | |
963 | .long SYS_CODE64_SEL # selector 15:0 | |
964 | .byte 0 # 0 for interrupt gate | |
965 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present | |
966 | .word 0 # offset 31:16 | |
967 | .long 0 # offset 63:32 | |
968 | .long 0 # 0 for reserved | |
969 | ||
970 | # IRQ 5 (LPT 2) - (INT 6dh) | |
971 | .equ IRQ5_SEL, .-IDT_BASE | |
972 | .word 0 # offset 15:0 | |
973 | .long SYS_CODE64_SEL # selector 15:0 | |
974 | .byte 0 # 0 for interrupt gate | |
975 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present | |
976 | .word 0 # offset 31:16 | |
977 | .long 0 # offset 63:32 | |
978 | .long 0 # 0 for reserved | |
979 | ||
980 | # IRQ 6 (Floppy controller) - (INT 6eh) | |
981 | .equ IRQ6_SEL, .-IDT_BASE | |
982 | .word 0 # offset 15:0 | |
983 | .long SYS_CODE64_SEL # selector 15:0 | |
984 | .byte 0 # 0 for interrupt gate | |
985 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present | |
986 | .word 0 # offset 31:16 | |
987 | .long 0 # offset 63:32 | |
988 | .long 0 # 0 for reserved | |
989 | ||
990 | # IRQ 7 (LPT 1) - (INT 6fh) | |
991 | .equ IRQ7_SEL, .-IDT_BASE | |
992 | .word 0 # offset 15:0 | |
993 | .long SYS_CODE64_SEL # selector 15:0 | |
994 | .byte 0 # 0 for interrupt gate | |
995 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present | |
996 | .word 0 # offset 31:16 | |
997 | .long 0 # offset 63:32 | |
998 | .long 0 # 0 for reserved | |
999 | ||
1000 | # IRQ 8 (RTC Alarm) - (INT 70h) | |
1001 | .equ IRQ8_SEL, .-IDT_BASE | |
1002 | .word 0 # offset 15:0 | |
1003 | .long SYS_CODE64_SEL # selector 15:0 | |
1004 | .byte 0 # 0 for interrupt gate | |
1005 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present | |
1006 | .word 0 # offset 31:16 | |
1007 | .long 0 # offset 63:32 | |
1008 | .long 0 # 0 for reserved | |
1009 | ||
1010 | # IRQ 9 - (INT 71h) | |
1011 | .equ IRQ9_SEL, .-IDT_BASE | |
1012 | .word 0 # offset 15:0 | |
1013 | .long SYS_CODE64_SEL # selector 15:0 | |
1014 | .byte 0 # 0 for interrupt gate | |
1015 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present | |
1016 | .word 0 # offset 31:16 | |
1017 | .long 0 # offset 63:32 | |
1018 | .long 0 # 0 for reserved | |
1019 | ||
1020 | # IRQ 10 - (INT 72h) | |
1021 | .equ IRQ10_SEL, .-IDT_BASE | |
1022 | .word 0 # offset 15:0 | |
1023 | .long SYS_CODE64_SEL # selector 15:0 | |
1024 | .byte 0 # 0 for interrupt gate | |
1025 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present | |
1026 | .word 0 # offset 31:16 | |
1027 | .long 0 # offset 63:32 | |
1028 | .long 0 # 0 for reserved | |
1029 | ||
1030 | # IRQ 11 - (INT 73h) | |
1031 | .equ IRQ11_SEL, .-IDT_BASE | |
1032 | .word 0 # offset 15:0 | |
1033 | .long SYS_CODE64_SEL # selector 15:0 | |
1034 | .byte 0 # 0 for interrupt gate | |
1035 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present | |
1036 | .word 0 # offset 31:16 | |
1037 | .long 0 # offset 63:32 | |
1038 | .long 0 # 0 for reserved | |
1039 | ||
1040 | # IRQ 12 (PS/2 mouse) - (INT 74h) | |
1041 | .equ IRQ12_SEL, .-IDT_BASE | |
1042 | .word 0 # offset 15:0 | |
1043 | .long SYS_CODE64_SEL # selector 15:0 | |
1044 | .byte 0 # 0 for interrupt gate | |
1045 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present | |
1046 | .word 0 # offset 31:16 | |
1047 | .long 0 # offset 63:32 | |
1048 | .long 0 # 0 for reserved | |
1049 | ||
1050 | # IRQ 13 (Floating point error) - (INT 75h) | |
1051 | .equ IRQ13_SEL, .-IDT_BASE | |
1052 | .word 0 # offset 15:0 | |
1053 | .long SYS_CODE64_SEL # selector 15:0 | |
1054 | .byte 0 # 0 for interrupt gate | |
1055 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present | |
1056 | .word 0 # offset 31:16 | |
1057 | .long 0 # offset 63:32 | |
1058 | .long 0 # 0 for reserved | |
1059 | ||
1060 | # IRQ 14 (Secondary IDE) - (INT 76h) | |
1061 | .equ IRQ14_SEL, .-IDT_BASE | |
1062 | .word 0 # offset 15:0 | |
1063 | .long SYS_CODE64_SEL # selector 15:0 | |
1064 | .byte 0 # 0 for interrupt gate | |
1065 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present | |
1066 | .word 0 # offset 31:16 | |
1067 | .long 0 # offset 63:32 | |
1068 | .long 0 # 0 for reserved | |
1069 | ||
1070 | # IRQ 15 (Primary IDE) - (INT 77h) | |
1071 | .equ IRQ15_SEL, .-IDT_BASE | |
1072 | .word 0 # offset 15:0 | |
1073 | .long SYS_CODE64_SEL # selector 15:0 | |
1074 | .byte 0 # 0 for interrupt gate | |
1075 | .byte 0x0e | 0x80 # type = 386 interrupt gate, present | |
1076 | .word 0 # offset 31:16 | |
1077 | .long 0 # offset 63:32 | |
1078 | .long 0 # 0 for reserved | |
1079 | ||
1080 | IDT_END: | |
1081 | ||
1082 | .align 0x2 | |
1083 | ||
1084 | MemoryMapSize: .long 0 | |
1085 | MemoryMap: .long 0,0,0,0,0,0,0,0 | |
1086 | .long 0,0,0,0,0,0,0,0 | |
1087 | .long 0,0,0,0,0,0,0,0 | |
1088 | .long 0,0,0,0,0,0,0,0 | |
1089 | .long 0,0,0,0,0,0,0,0 | |
1090 | .long 0,0,0,0,0,0,0,0 | |
1091 | .long 0,0,0,0,0,0,0,0 | |
1092 | .long 0,0,0,0,0,0,0,0 | |
1093 | .long 0,0,0,0,0,0,0,0 | |
1094 | .long 0,0,0,0,0,0,0,0 | |
1095 | .long 0,0,0,0,0,0,0,0 | |
1096 | .long 0,0,0,0,0,0,0,0 | |
1097 | .long 0,0,0,0,0,0,0,0 | |
1098 | .long 0,0,0,0,0,0,0,0 | |
1099 | .long 0,0,0,0,0,0,0,0 | |
1100 | .long 0,0,0,0,0,0,0,0 | |
1101 | .long 0,0,0,0,0,0,0,0 | |
1102 | .long 0,0,0,0,0,0,0,0 | |
1103 | .long 0,0,0,0,0,0,0,0 | |
1104 | .long 0,0,0,0,0,0,0,0 | |
1105 | .long 0,0,0,0,0,0,0,0 | |
1106 | .long 0,0,0,0,0,0,0,0 | |
1107 | .long 0,0,0,0,0,0,0,0 | |
1108 | .long 0,0,0,0,0,0,0,0 | |
1109 | .long 0,0,0,0,0,0,0,0 | |
1110 | .long 0,0,0,0,0,0,0,0 | |
1111 | .long 0,0,0,0,0,0,0,0 | |
1112 | .long 0,0,0,0,0,0,0,0 | |
1113 | .long 0,0,0,0,0,0,0,0 | |
1114 | .long 0,0,0,0,0,0,0,0 | |
1115 | ||
1116 | .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 | |
1117 | .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 | |
1118 | ||
1119 | #.org 0x0fe0 #Just for pass build | |
1120 | MyStack: | |
1121 | # below is the pieces of the IVT that is used to redirect INT 68h - 6fh | |
1122 | # back to INT 08h - 0fh when in real mode... It is 'org'ed to a | |
1123 | # known low address (20f00) so it can be set up by PlMapIrqToVect in | |
1124 | # 8259.c | |
1125 | ||
1126 | int $8 | |
1127 | iret | |
1128 | ||
1129 | int $9 | |
1130 | iret | |
1131 | ||
1132 | int $10 | |
1133 | iret | |
1134 | ||
1135 | int $11 | |
1136 | iret | |
1137 | ||
1138 | int $12 | |
1139 | iret | |
1140 | ||
1141 | int $13 | |
1142 | iret | |
1143 | ||
1144 | int $14 | |
1145 | iret | |
1146 | ||
1147 | int $15 | |
1148 | iret | |
1149 | ||
1150 | ||
1151 | #.org 0x0ffe #Just for pass build | |
1152 | BlockSignature: | |
1153 | .word 0xaa55 | |
1154 |