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bcecde14 | 1 | /** @file\r |
2 | Routines that use BIOS to support INT 13 devices.\r | |
3 | \r | |
4 | Copyright (c) 1999 - 2010, Intel Corporation. All rights reserved.<BR>\r | |
5 | \r | |
6 | This program and the accompanying materials\r | |
7 | are licensed and made available under the terms and conditions\r | |
8 | of the BSD License which accompanies this distribution. The\r | |
9 | full text of the license may be found at\r | |
10 | http://opensource.org/licenses/bsd-license.php\r | |
11 | \r | |
12 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
13 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
14 | \r | |
15 | **/\r | |
16 | \r | |
17 | #include "BiosBlkIo.h"\r | |
18 | \r | |
19 | //\r | |
20 | // Module global variables\r | |
21 | //\r | |
22 | //\r | |
23 | // Address packet is a buffer under 1 MB for all version EDD calls\r | |
24 | //\r | |
25 | extern EDD_DEVICE_ADDRESS_PACKET *mEddBufferUnder1Mb;\r | |
26 | \r | |
27 | //\r | |
28 | // This is a buffer for INT 13h func 48 information\r | |
29 | //\r | |
30 | extern BIOS_LEGACY_DRIVE *mLegacyDriverUnder1Mb;\r | |
31 | \r | |
32 | //\r | |
33 | // Buffer of 0xFE00 bytes for EDD 1.1 transfer must be under 1 MB\r | |
34 | // 0xFE00 bytes is the max transfer size supported.\r | |
35 | //\r | |
36 | extern VOID *mEdd11Buffer;\r | |
37 | \r | |
38 | \r | |
39 | /**\r | |
40 | Initialize block I/O device instance\r | |
41 | \r | |
42 | @param Dev Instance of block I/O device instance\r | |
43 | \r | |
44 | @retval TRUE Initialization succeeds.\r | |
45 | @retval FALSE Initialization fails.\r | |
46 | \r | |
47 | **/\r | |
48 | BOOLEAN\r | |
49 | BiosInitBlockIo (\r | |
50 | IN BIOS_BLOCK_IO_DEV *Dev\r | |
51 | )\r | |
52 | {\r | |
53 | EFI_BLOCK_IO_PROTOCOL *BlockIo;\r | |
54 | EFI_BLOCK_IO_MEDIA *BlockMedia;\r | |
55 | BIOS_LEGACY_DRIVE *Bios;\r | |
56 | \r | |
57 | BlockIo = &Dev->BlockIo;\r | |
58 | BlockIo->Media = &Dev->BlockMedia;\r | |
59 | BlockMedia = BlockIo->Media;\r | |
60 | Bios = &Dev->Bios;\r | |
61 | \r | |
62 | if (Int13GetDeviceParameters (Dev, Bios) != 0) {\r | |
63 | if (Int13Extensions (Dev, Bios) != 0) {\r | |
64 | BlockMedia->LastBlock = (EFI_LBA) Bios->Parameters.PhysicalSectors - 1;\r | |
65 | BlockMedia->BlockSize = (UINT32) Bios->Parameters.BytesPerSector;\r | |
66 | \r | |
67 | if ((Bios->Parameters.Flags & EDD_DEVICE_REMOVABLE) == EDD_DEVICE_REMOVABLE) {\r | |
68 | BlockMedia->RemovableMedia = TRUE;\r | |
69 | }\r | |
70 | \r | |
71 | } else {\r | |
72 | //\r | |
73 | // Legacy Interfaces\r | |
74 | //\r | |
75 | BlockMedia->BlockSize = 512;\r | |
76 | BlockMedia->LastBlock = (Bios->MaxHead + 1) * Bios->MaxSector * (Bios->MaxCylinder + 1) - 1;\r | |
77 | }\r | |
78 | \r | |
79 | DEBUG ((DEBUG_INIT, "BlockSize = %d LastBlock = %d\n", BlockMedia->BlockSize, BlockMedia->LastBlock));\r | |
80 | \r | |
81 | BlockMedia->LogicalPartition = FALSE;\r | |
82 | BlockMedia->WriteCaching = FALSE;\r | |
83 | \r | |
84 | //\r | |
85 | // BugBug: Need to set this for removable media devices if they do not\r | |
86 | // have media present\r | |
87 | //\r | |
88 | BlockMedia->ReadOnly = FALSE;\r | |
89 | BlockMedia->MediaPresent = TRUE;\r | |
90 | \r | |
91 | BlockIo->Reset = BiosBlockIoReset;\r | |
92 | BlockIo->FlushBlocks = BiosBlockIoFlushBlocks;\r | |
93 | \r | |
94 | if (!Bios->ExtendedInt13) {\r | |
95 | //\r | |
96 | // Legacy interfaces\r | |
97 | //\r | |
98 | BlockIo->ReadBlocks = BiosReadLegacyDrive;\r | |
99 | BlockIo->WriteBlocks = BiosWriteLegacyDrive;\r | |
100 | } else if ((Bios->EddVersion == EDD_VERSION_30) && (Bios->Extensions64Bit)) {\r | |
101 | //\r | |
102 | // EDD 3.0 Required for Device path, but extended reads are not required.\r | |
103 | //\r | |
104 | BlockIo->ReadBlocks = Edd30BiosReadBlocks;\r | |
105 | BlockIo->WriteBlocks = Edd30BiosWriteBlocks;\r | |
106 | } else {\r | |
107 | //\r | |
108 | // Assume EDD 1.1 - Read and Write functions.\r | |
109 | // This could be EDD 3.0 without Extensions64Bit being set.\r | |
110 | // If it's EDD 1.1 this will work, but the device path will not\r | |
111 | // be correct. This will cause confusion to EFI OS installation.\r | |
112 | //\r | |
113 | BlockIo->ReadBlocks = Edd11BiosReadBlocks;\r | |
114 | BlockIo->WriteBlocks = Edd11BiosWriteBlocks;\r | |
115 | }\r | |
116 | \r | |
117 | BlockMedia->LogicalPartition = FALSE;\r | |
118 | BlockMedia->WriteCaching = FALSE;\r | |
119 | \r | |
120 | return TRUE;\r | |
121 | }\r | |
122 | \r | |
123 | return FALSE;\r | |
124 | }\r | |
125 | \r | |
126 | /**\r | |
127 | Gets parameters of block I/O device.\r | |
128 | \r | |
129 | @param BiosBlockIoDev Instance of block I/O device.\r | |
130 | @param Drive Legacy drive.\r | |
131 | \r | |
132 | @return Result of device parameter retrieval.\r | |
133 | \r | |
134 | **/\r | |
135 | UINTN\r | |
136 | Int13GetDeviceParameters (\r | |
137 | IN BIOS_BLOCK_IO_DEV *BiosBlockIoDev,\r | |
138 | IN BIOS_LEGACY_DRIVE *Drive\r | |
139 | )\r | |
140 | {\r | |
141 | UINTN CarryFlag;\r | |
142 | UINT16 Cylinder;\r | |
143 | EFI_IA32_REGISTER_SET Regs;\r | |
144 | \r | |
145 | ZeroMem (&Regs, sizeof (EFI_IA32_REGISTER_SET));\r | |
146 | \r | |
147 | Regs.H.AH = 0x08;\r | |
148 | Regs.H.DL = Drive->Number;\r | |
149 | CarryFlag = BiosBlockIoDev->LegacyBios->Int86 (BiosBlockIoDev->LegacyBios, 0x13, &Regs);\r | |
150 | DEBUG ((DEBUG_INIT, "Int13GetDeviceParameters: INT 13 08 DL=%02x : CF=%d AH=%02x\n", Drive->Number, CarryFlag, Regs.H.AH));\r | |
151 | if (CarryFlag != 0 || Regs.H.AH != 0x00) {\r | |
152 | Drive->ErrorCode = Regs.H.AH;\r | |
153 | return FALSE;\r | |
154 | }\r | |
155 | \r | |
156 | if (Drive->Floppy) {\r | |
157 | if (Regs.H.BL == 0x10) {\r | |
158 | Drive->AtapiFloppy = TRUE;\r | |
159 | } else {\r | |
160 | Drive->MaxHead = Regs.H.DH;\r | |
161 | Drive->MaxSector = Regs.H.CL;\r | |
162 | Drive->MaxCylinder = Regs.H.CH;\r | |
163 | if (Drive->MaxSector == 0) {\r | |
164 | //\r | |
165 | // BugBug: You can not trust the Carry flag.\r | |
166 | //\r | |
167 | return FALSE;\r | |
168 | }\r | |
169 | }\r | |
170 | } else {\r | |
171 | Drive->MaxHead = (UINT8) (Regs.H.DH & 0x3f);\r | |
172 | Cylinder = (UINT16) (((UINT16) Regs.H.DH & 0xc0) << 4);\r | |
173 | Cylinder = (UINT16) (Cylinder | ((UINT16) Regs.H.CL & 0xc0) << 2);\r | |
174 | Drive->MaxCylinder = (UINT16) (Cylinder + Regs.H.CH);\r | |
175 | Drive->MaxSector = (UINT8) (Regs.H.CL & 0x3f);\r | |
176 | }\r | |
177 | \r | |
178 | return TRUE;\r | |
179 | }\r | |
180 | \r | |
181 | /**\r | |
182 | Extension of INT13 call.\r | |
183 | \r | |
184 | @param BiosBlockIoDev Instance of block I/O device.\r | |
185 | @param Drive Legacy drive.\r | |
186 | \r | |
187 | @return Result of this extension.\r | |
188 | \r | |
189 | **/\r | |
190 | UINTN\r | |
191 | Int13Extensions (\r | |
192 | IN BIOS_BLOCK_IO_DEV *BiosBlockIoDev,\r | |
193 | IN BIOS_LEGACY_DRIVE *Drive\r | |
194 | )\r | |
195 | {\r | |
196 | INTN CarryFlag;\r | |
197 | EFI_IA32_REGISTER_SET Regs;\r | |
198 | \r | |
199 | ZeroMem (&Regs, sizeof (EFI_IA32_REGISTER_SET));\r | |
200 | \r | |
201 | Regs.H.AH = 0x41;\r | |
202 | Regs.X.BX = 0x55aa;\r | |
203 | Regs.H.DL = Drive->Number;\r | |
204 | CarryFlag = BiosBlockIoDev->LegacyBios->Int86 (BiosBlockIoDev->LegacyBios, 0x13, &Regs);\r | |
205 | DEBUG ((DEBUG_INIT, "Int13Extensions: INT 13 41 DL=%02x : CF=%d BX=%04x\n", Drive->Number, CarryFlag, Regs.X.BX));\r | |
206 | if (CarryFlag != 0 || Regs.X.BX != 0xaa55) {\r | |
207 | Drive->ExtendedInt13 = FALSE;\r | |
208 | Drive->DriveLockingAndEjecting = FALSE;\r | |
209 | Drive->Edd = FALSE;\r | |
210 | return FALSE;\r | |
211 | }\r | |
212 | \r | |
213 | Drive->EddVersion = Regs.H.AH;\r | |
214 | Drive->ExtendedInt13 = (BOOLEAN) ((Regs.X.CX & 0x01) == 0x01);\r | |
215 | Drive->DriveLockingAndEjecting = (BOOLEAN) ((Regs.X.CX & 0x02) == 0x02);\r | |
216 | Drive->Edd = (BOOLEAN) ((Regs.X.CX & 0x04) == 0x04);\r | |
217 | Drive->Extensions64Bit = (BOOLEAN) (Regs.X.CX & 0x08);\r | |
218 | \r | |
219 | Drive->ParametersValid = (UINT8) GetDriveParameters (BiosBlockIoDev, Drive);\r | |
220 | return TRUE;\r | |
221 | }\r | |
222 | \r | |
223 | /**\r | |
224 | Gets parameters of legacy drive.\r | |
225 | \r | |
226 | @param BiosBlockIoDev Instance of block I/O device.\r | |
227 | @param Drive Legacy drive.\r | |
228 | \r | |
229 | @return Result of drive parameter retrieval.\r | |
230 | \r | |
231 | **/\r | |
232 | UINTN\r | |
233 | GetDriveParameters (\r | |
234 | IN BIOS_BLOCK_IO_DEV *BiosBlockIoDev,\r | |
235 | IN BIOS_LEGACY_DRIVE *Drive\r | |
236 | )\r | |
237 | {\r | |
238 | INTN CarryFlag;\r | |
239 | EFI_IA32_REGISTER_SET Regs;\r | |
240 | UINTN PointerMath;\r | |
241 | \r | |
242 | ZeroMem (&Regs, sizeof (EFI_IA32_REGISTER_SET));\r | |
243 | \r | |
244 | Regs.H.AH = 0x48;\r | |
245 | Regs.H.DL = Drive->Number;\r | |
246 | \r | |
247 | //\r | |
248 | // EDD Buffer must be passed in with max buffer size as first entry in the buffer\r | |
249 | //\r | |
250 | mLegacyDriverUnder1Mb->Parameters.StructureSize = (UINT16) sizeof (EDD_DRIVE_PARAMETERS);\r | |
251 | Regs.X.DS = EFI_SEGMENT ((UINTN)(&mLegacyDriverUnder1Mb->Parameters));\r | |
252 | Regs.X.SI = EFI_OFFSET ((UINTN)(&mLegacyDriverUnder1Mb->Parameters));\r | |
253 | CarryFlag = BiosBlockIoDev->LegacyBios->Int86 (BiosBlockIoDev->LegacyBios, 0x13, &Regs);\r | |
254 | DEBUG ((DEBUG_INIT, "GetDriveParameters: INT 13 48 DL=%02x : CF=%d AH=%02x\n", Drive->Number, CarryFlag, Regs.H.AH));\r | |
255 | if (CarryFlag != 0 || Regs.H.AH != 0x00) {\r | |
256 | Drive->ErrorCode = Regs.H.AH;\r | |
257 | SetMem (&Drive->Parameters, sizeof (Drive->Parameters), 0xaf);\r | |
258 | return FALSE;\r | |
259 | }\r | |
260 | //\r | |
261 | // We only have one buffer < 1MB, so copy into our instance data\r | |
262 | //\r | |
263 | CopyMem (\r | |
264 | &Drive->Parameters,\r | |
265 | &mLegacyDriverUnder1Mb->Parameters,\r | |
266 | sizeof (Drive->Parameters)\r | |
267 | );\r | |
268 | \r | |
269 | if (Drive->AtapiFloppy) {\r | |
270 | //\r | |
271 | // Sense Media Type\r | |
272 | //\r | |
273 | Regs.H.AH = 0x20;\r | |
274 | Regs.H.DL = Drive->Number;\r | |
275 | CarryFlag = BiosBlockIoDev->LegacyBios->Int86 (BiosBlockIoDev->LegacyBios, 0x13, &Regs);\r | |
276 | DEBUG ((DEBUG_INIT, "GetDriveParameters: INT 13 20 DL=%02x : CF=%d AL=%02x\n", Drive->Number, CarryFlag, Regs.H.AL));\r | |
277 | if (CarryFlag != 0) {\r | |
278 | //\r | |
279 | // Media not present or unknown media present\r | |
280 | //\r | |
281 | if ((Drive->Parameters.Flags & EDD_GEOMETRY_VALID) == EDD_GEOMETRY_VALID) {\r | |
282 | Drive->MaxHead = (UINT8) (Drive->Parameters.MaxHeads - 1);\r | |
283 | Drive->MaxSector = (UINT8) Drive->Parameters.SectorsPerTrack;\r | |
284 | ASSERT (Drive->MaxSector != 0);\r | |
285 | Drive->MaxCylinder = (UINT16) (Drive->Parameters.MaxCylinders - 1);\r | |
286 | } else {\r | |
287 | Drive->MaxHead = 0;\r | |
288 | Drive->MaxSector = 1;\r | |
289 | Drive->MaxCylinder = 0;\r | |
290 | }\r | |
291 | \r | |
292 | } else {\r | |
293 | //\r | |
294 | // Media Present\r | |
295 | //\r | |
296 | switch (Regs.H.AL) {\r | |
297 | case 0x03:\r | |
298 | //\r | |
299 | // 720 KB\r | |
300 | //\r | |
301 | Drive->MaxHead = 1;\r | |
302 | Drive->MaxSector = 9;\r | |
303 | Drive->MaxCylinder = 79;\r | |
304 | break;\r | |
305 | \r | |
306 | case 0x04:\r | |
307 | //\r | |
308 | // 1.44MB\r | |
309 | //\r | |
310 | Drive->MaxHead = 1;\r | |
311 | Drive->MaxSector = 18;\r | |
312 | Drive->MaxCylinder = 79;\r | |
313 | break;\r | |
314 | \r | |
315 | case 0x06:\r | |
316 | //\r | |
317 | // 2.88MB\r | |
318 | //\r | |
319 | Drive->MaxHead = 1;\r | |
320 | Drive->MaxSector = 36;\r | |
321 | Drive->MaxCylinder = 79;\r | |
322 | break;\r | |
323 | \r | |
324 | case 0x0C:\r | |
325 | //\r | |
326 | // 360 KB\r | |
327 | //\r | |
328 | Drive->MaxHead = 1;\r | |
329 | Drive->MaxSector = 9;\r | |
330 | Drive->MaxCylinder = 39;\r | |
331 | break;\r | |
332 | \r | |
333 | case 0x0D:\r | |
334 | //\r | |
335 | // 1.2 MB\r | |
336 | //\r | |
337 | Drive->MaxHead = 1;\r | |
338 | Drive->MaxSector = 15;\r | |
339 | Drive->MaxCylinder = 79;\r | |
340 | break;\r | |
341 | \r | |
342 | case 0x0E:\r | |
343 | //\r | |
344 | // Toshiba 3 mode\r | |
345 | //\r | |
346 | case 0x0F:\r | |
347 | //\r | |
348 | // NEC 3 mode\r | |
349 | //\r | |
350 | case 0x10:\r | |
351 | //\r | |
352 | // Default Media\r | |
353 | //\r | |
354 | if ((Drive->Parameters.Flags & EDD_GEOMETRY_VALID) == EDD_GEOMETRY_VALID) {\r | |
355 | Drive->MaxHead = (UINT8) (Drive->Parameters.MaxHeads - 1);\r | |
356 | Drive->MaxSector = (UINT8) Drive->Parameters.SectorsPerTrack;\r | |
357 | ASSERT (Drive->MaxSector != 0);\r | |
358 | Drive->MaxCylinder = (UINT16) (Drive->Parameters.MaxCylinders - 1);\r | |
359 | } else {\r | |
360 | Drive->MaxHead = 0;\r | |
361 | Drive->MaxSector = 1;\r | |
362 | Drive->MaxCylinder = 0;\r | |
363 | }\r | |
364 | break;\r | |
365 | \r | |
366 | default:\r | |
367 | //\r | |
368 | // Unknown media type.\r | |
369 | //\r | |
370 | Drive->MaxHead = 0;\r | |
371 | Drive->MaxSector = 1;\r | |
372 | Drive->MaxCylinder = 0;\r | |
373 | break;\r | |
374 | }\r | |
375 | }\r | |
376 | \r | |
377 | Drive->Parameters.PhysicalSectors = (Drive->MaxHead + 1) * Drive->MaxSector * (Drive->MaxCylinder + 1);\r | |
378 | Drive->Parameters.BytesPerSector = 512;\r | |
379 | }\r | |
380 | //\r | |
381 | // This data comes from the BIOS so it may not allways be valid\r | |
382 | // since the BIOS may reuse this buffer for future accesses\r | |
383 | //\r | |
384 | PointerMath = EFI_SEGMENT (Drive->Parameters.Fdpt) << 4;\r | |
385 | PointerMath += EFI_OFFSET (Drive->Parameters.Fdpt);\r | |
386 | Drive->FdptPointer = (VOID *) PointerMath;\r | |
387 | \r | |
388 | return TRUE;\r | |
389 | }\r | |
390 | //\r | |
391 | // Block IO Routines\r | |
392 | //\r | |
393 | \r | |
394 | /**\r | |
395 | Read BufferSize bytes from Lba into Buffer.\r | |
396 | \r | |
397 | @param This Indicates a pointer to the calling context.\r | |
398 | @param MediaId Id of the media, changes every time the media is replaced.\r | |
399 | @param Lba The starting Logical Block Address to read from\r | |
400 | @param BufferSize Size of Buffer, must be a multiple of device block size.\r | |
401 | @param Buffer A pointer to the destination buffer for the data. The caller is\r | |
402 | responsible for either having implicit or explicit ownership of the buffer.\r | |
403 | \r | |
404 | @retval EFI_SUCCESS The data was read correctly from the device.\r | |
405 | @retval EFI_DEVICE_ERROR The device reported an error while performing the read.\r | |
406 | @retval EFI_NO_MEDIA There is no media in the device.\r | |
407 | @retval EFI_MEDIA_CHANGED The MediaId does not matched the current device.\r | |
408 | @retval EFI_BAD_BUFFER_SIZE The Buffer was not a multiple of the block size of the device.\r | |
409 | @retval EFI_INVALID_PARAMETER The read request contains LBAs that are not valid, \r | |
410 | or the buffer is not on proper alignment.\r | |
411 | \r | |
412 | **/\r | |
413 | EFI_STATUS\r | |
414 | EFIAPI\r | |
415 | Edd30BiosReadBlocks (\r | |
416 | IN EFI_BLOCK_IO_PROTOCOL *This,\r | |
417 | IN UINT32 MediaId,\r | |
418 | IN EFI_LBA Lba,\r | |
419 | IN UINTN BufferSize,\r | |
420 | OUT VOID *Buffer\r | |
421 | )\r | |
422 | {\r | |
423 | EFI_BLOCK_IO_MEDIA *Media;\r | |
424 | BIOS_BLOCK_IO_DEV *BiosBlockIoDev;\r | |
425 | EDD_DEVICE_ADDRESS_PACKET *AddressPacket;\r | |
426 | //\r | |
427 | // I exist only for readability\r | |
428 | //\r | |
429 | EFI_IA32_REGISTER_SET Regs;\r | |
430 | UINT64 TransferBuffer;\r | |
431 | UINTN NumberOfBlocks;\r | |
432 | UINTN TransferByteSize;\r | |
433 | UINTN BlockSize;\r | |
434 | BIOS_LEGACY_DRIVE *Bios;\r | |
435 | UINTN CarryFlag;\r | |
436 | UINTN MaxTransferBlocks;\r | |
437 | EFI_BLOCK_IO_PROTOCOL *BlockIo;\r | |
438 | \r | |
439 | Media = This->Media;\r | |
440 | BlockSize = Media->BlockSize;\r | |
441 | \r | |
442 | ZeroMem (&Regs, sizeof (EFI_IA32_REGISTER_SET));\r | |
443 | \r | |
444 | if (MediaId != Media->MediaId) {\r | |
445 | return EFI_MEDIA_CHANGED;\r | |
446 | }\r | |
447 | \r | |
448 | if (Lba > Media->LastBlock) {\r | |
449 | return EFI_INVALID_PARAMETER;\r | |
450 | }\r | |
451 | \r | |
452 | if ((Lba + (BufferSize / BlockSize) - 1) > Media->LastBlock) {\r | |
453 | return EFI_INVALID_PARAMETER;\r | |
454 | }\r | |
455 | \r | |
456 | if (BufferSize % BlockSize != 0) {\r | |
457 | return EFI_BAD_BUFFER_SIZE;\r | |
458 | }\r | |
459 | \r | |
460 | if (Buffer == NULL) {\r | |
461 | return EFI_INVALID_PARAMETER;\r | |
462 | }\r | |
463 | \r | |
464 | if (BufferSize == 0) {\r | |
465 | return EFI_SUCCESS;\r | |
466 | }\r | |
467 | \r | |
468 | BiosBlockIoDev = BIOS_BLOCK_IO_FROM_THIS (This);\r | |
469 | AddressPacket = mEddBufferUnder1Mb;\r | |
470 | \r | |
471 | MaxTransferBlocks = MAX_EDD11_XFER / BlockSize;\r | |
472 | \r | |
473 | TransferBuffer = (UINT64)(UINTN) Buffer;\r | |
474 | for (; BufferSize > 0;) {\r | |
475 | NumberOfBlocks = BufferSize / BlockSize;\r | |
476 | NumberOfBlocks = NumberOfBlocks > MaxTransferBlocks ? MaxTransferBlocks : NumberOfBlocks;\r | |
477 | //\r | |
478 | // Max transfer MaxTransferBlocks\r | |
479 | //\r | |
480 | AddressPacket->PacketSizeInBytes = (UINT8) sizeof (EDD_DEVICE_ADDRESS_PACKET);\r | |
481 | AddressPacket->Zero = 0;\r | |
482 | AddressPacket->NumberOfBlocks = (UINT8) NumberOfBlocks;\r | |
483 | AddressPacket->Zero2 = 0;\r | |
484 | AddressPacket->SegOffset = 0xffffffff;\r | |
485 | AddressPacket->Lba = (UINT64) Lba;\r | |
486 | AddressPacket->TransferBuffer = TransferBuffer;\r | |
487 | \r | |
488 | Regs.H.AH = 0x42;\r | |
489 | Regs.H.DL = BiosBlockIoDev->Bios.Number;\r | |
490 | Regs.X.SI = EFI_OFFSET (AddressPacket);\r | |
491 | Regs.X.DS = EFI_SEGMENT (AddressPacket);\r | |
492 | \r | |
493 | CarryFlag = BiosBlockIoDev->LegacyBios->Int86 (BiosBlockIoDev->LegacyBios, 0x13, &Regs);\r | |
494 | DEBUG (\r | |
495 | (\r | |
496 | DEBUG_BLKIO, "Edd30BiosReadBlocks: INT 13 42 DL=%02x : CF=%d AH=%02x\n", BiosBlockIoDev->Bios.Number,\r | |
497 | CarryFlag, Regs.H.AH\r | |
498 | )\r | |
499 | );\r | |
500 | \r | |
501 | Media->MediaPresent = TRUE;\r | |
502 | if (CarryFlag != 0) {\r | |
503 | //\r | |
504 | // Return Error Status\r | |
505 | //\r | |
506 | BiosBlockIoDev->Bios.ErrorCode = Regs.H.AH;\r | |
507 | if (BiosBlockIoDev->Bios.ErrorCode == BIOS_DISK_CHANGED) {\r | |
508 | Media->MediaId++;\r | |
509 | Bios = &BiosBlockIoDev->Bios;\r | |
510 | if (Int13GetDeviceParameters (BiosBlockIoDev, Bios) != 0) {\r | |
511 | if (Int13Extensions (BiosBlockIoDev, Bios) != 0) {\r | |
512 | Media->LastBlock = (EFI_LBA) Bios->Parameters.PhysicalSectors - 1;\r | |
513 | Media->BlockSize = (UINT32) Bios->Parameters.BytesPerSector;\r | |
514 | } else {\r | |
515 | ASSERT (FALSE);\r | |
516 | }\r | |
517 | \r | |
518 | Media->ReadOnly = FALSE;\r | |
519 | gBS->HandleProtocol (BiosBlockIoDev->Handle, &gEfiBlockIoProtocolGuid, (VOID **) &BlockIo);\r | |
520 | gBS->ReinstallProtocolInterface (BiosBlockIoDev->Handle, &gEfiBlockIoProtocolGuid, BlockIo, BlockIo);\r | |
521 | return EFI_MEDIA_CHANGED;\r | |
522 | }\r | |
523 | }\r | |
524 | \r | |
525 | if (Media->RemovableMedia) {\r | |
526 | Media->MediaPresent = FALSE;\r | |
527 | }\r | |
528 | \r | |
529 | return EFI_DEVICE_ERROR;\r | |
530 | }\r | |
531 | \r | |
532 | TransferByteSize = NumberOfBlocks * BlockSize;\r | |
533 | BufferSize = BufferSize - TransferByteSize;\r | |
534 | TransferBuffer += TransferByteSize;\r | |
535 | Lba += NumberOfBlocks;\r | |
536 | }\r | |
537 | \r | |
538 | return EFI_SUCCESS;\r | |
539 | }\r | |
540 | \r | |
541 | /**\r | |
542 | Write BufferSize bytes from Lba into Buffer.\r | |
543 | \r | |
544 | @param This Indicates a pointer to the calling context.\r | |
545 | @param MediaId The media ID that the write request is for.\r | |
546 | @param Lba The starting logical block address to be written. The caller is\r | |
547 | responsible for writing to only legitimate locations.\r | |
548 | @param BufferSize Size of Buffer, must be a multiple of device block size.\r | |
549 | @param Buffer A pointer to the source buffer for the data.\r | |
550 | \r | |
551 | @retval EFI_SUCCESS The data was written correctly to the device.\r | |
552 | @retval EFI_WRITE_PROTECTED The device can not be written to.\r | |
553 | @retval EFI_DEVICE_ERROR The device reported an error while performing the write.\r | |
554 | @retval EFI_NO_MEDIA There is no media in the device.\r | |
555 | @retval EFI_MEDIA_CHNAGED The MediaId does not matched the current device.\r | |
556 | @retval EFI_BAD_BUFFER_SIZE The Buffer was not a multiple of the block size of the device.\r | |
557 | @retval EFI_INVALID_PARAMETER The write request contains LBAs that are not valid, \r | |
558 | or the buffer is not on proper alignment.\r | |
559 | \r | |
560 | **/\r | |
561 | EFI_STATUS\r | |
562 | EFIAPI\r | |
563 | Edd30BiosWriteBlocks (\r | |
564 | IN EFI_BLOCK_IO_PROTOCOL *This,\r | |
565 | IN UINT32 MediaId,\r | |
566 | IN EFI_LBA Lba,\r | |
567 | IN UINTN BufferSize,\r | |
568 | OUT VOID *Buffer\r | |
569 | )\r | |
570 | {\r | |
571 | EFI_BLOCK_IO_MEDIA *Media;\r | |
572 | BIOS_BLOCK_IO_DEV *BiosBlockIoDev;\r | |
573 | EDD_DEVICE_ADDRESS_PACKET *AddressPacket;\r | |
574 | //\r | |
575 | // I exist only for readability\r | |
576 | //\r | |
577 | EFI_IA32_REGISTER_SET Regs;\r | |
578 | UINT64 TransferBuffer;\r | |
579 | UINTN NumberOfBlocks;\r | |
580 | UINTN TransferByteSize;\r | |
581 | UINTN BlockSize;\r | |
582 | BIOS_LEGACY_DRIVE *Bios;\r | |
583 | UINTN CarryFlag;\r | |
584 | UINTN MaxTransferBlocks;\r | |
585 | EFI_BLOCK_IO_PROTOCOL *BlockIo;\r | |
586 | \r | |
587 | Media = This->Media;\r | |
588 | BlockSize = Media->BlockSize;\r | |
589 | \r | |
590 | ZeroMem (&Regs, sizeof (EFI_IA32_REGISTER_SET));\r | |
591 | \r | |
592 | if (MediaId != Media->MediaId) {\r | |
593 | return EFI_MEDIA_CHANGED;\r | |
594 | }\r | |
595 | \r | |
596 | if (Lba > Media->LastBlock) {\r | |
597 | return EFI_DEVICE_ERROR;\r | |
598 | }\r | |
599 | \r | |
600 | if ((Lba + (BufferSize / BlockSize) - 1) > Media->LastBlock) {\r | |
601 | return EFI_INVALID_PARAMETER;\r | |
602 | }\r | |
603 | \r | |
604 | if (BufferSize % BlockSize != 0) {\r | |
605 | return EFI_BAD_BUFFER_SIZE;\r | |
606 | }\r | |
607 | \r | |
608 | if (Buffer == NULL) {\r | |
609 | return EFI_INVALID_PARAMETER;\r | |
610 | }\r | |
611 | \r | |
612 | if (BufferSize == 0) {\r | |
613 | return EFI_SUCCESS;\r | |
614 | }\r | |
615 | \r | |
616 | BiosBlockIoDev = BIOS_BLOCK_IO_FROM_THIS (This);\r | |
617 | AddressPacket = mEddBufferUnder1Mb;\r | |
618 | \r | |
619 | MaxTransferBlocks = MAX_EDD11_XFER / BlockSize;\r | |
620 | \r | |
621 | TransferBuffer = (UINT64)(UINTN) Buffer;\r | |
622 | for (; BufferSize > 0;) {\r | |
623 | NumberOfBlocks = BufferSize / BlockSize;\r | |
624 | NumberOfBlocks = NumberOfBlocks > MaxTransferBlocks ? MaxTransferBlocks : NumberOfBlocks;\r | |
625 | //\r | |
626 | // Max transfer MaxTransferBlocks\r | |
627 | //\r | |
628 | AddressPacket->PacketSizeInBytes = (UINT8) sizeof (EDD_DEVICE_ADDRESS_PACKET);\r | |
629 | AddressPacket->Zero = 0;\r | |
630 | AddressPacket->NumberOfBlocks = (UINT8) NumberOfBlocks;\r | |
631 | AddressPacket->Zero2 = 0;\r | |
632 | AddressPacket->SegOffset = 0xffffffff;\r | |
633 | AddressPacket->Lba = (UINT64) Lba;\r | |
634 | AddressPacket->TransferBuffer = TransferBuffer;\r | |
635 | \r | |
636 | Regs.H.AH = 0x43;\r | |
637 | Regs.H.AL = 0x00;\r | |
638 | //\r | |
639 | // Write Verify Off\r | |
640 | //\r | |
641 | Regs.H.DL = (UINT8) (BiosBlockIoDev->Bios.Number);\r | |
642 | Regs.X.SI = EFI_OFFSET (AddressPacket);\r | |
643 | Regs.X.DS = EFI_SEGMENT (AddressPacket);\r | |
644 | \r | |
645 | CarryFlag = BiosBlockIoDev->LegacyBios->Int86 (BiosBlockIoDev->LegacyBios, 0x13, &Regs);\r | |
646 | DEBUG (\r | |
647 | (\r | |
648 | DEBUG_BLKIO, "Edd30BiosWriteBlocks: INT 13 43 DL=%02x : CF=%d AH=%02x\n", BiosBlockIoDev->Bios.Number,\r | |
649 | CarryFlag, Regs.H.AH\r | |
650 | )\r | |
651 | );\r | |
652 | \r | |
653 | Media->MediaPresent = TRUE;\r | |
654 | if (CarryFlag != 0) {\r | |
655 | //\r | |
656 | // Return Error Status\r | |
657 | //\r | |
658 | BiosBlockIoDev->Bios.ErrorCode = Regs.H.AH;\r | |
659 | if (BiosBlockIoDev->Bios.ErrorCode == BIOS_DISK_CHANGED) {\r | |
660 | Media->MediaId++;\r | |
661 | Bios = &BiosBlockIoDev->Bios;\r | |
662 | if (Int13GetDeviceParameters (BiosBlockIoDev, Bios) != 0) {\r | |
663 | if (Int13Extensions (BiosBlockIoDev, Bios) != 0) {\r | |
664 | Media->LastBlock = (EFI_LBA) Bios->Parameters.PhysicalSectors - 1;\r | |
665 | Media->BlockSize = (UINT32) Bios->Parameters.BytesPerSector;\r | |
666 | } else {\r | |
667 | ASSERT (FALSE);\r | |
668 | }\r | |
669 | \r | |
670 | Media->ReadOnly = FALSE;\r | |
671 | gBS->HandleProtocol (BiosBlockIoDev->Handle, &gEfiBlockIoProtocolGuid, (VOID **) &BlockIo);\r | |
672 | gBS->ReinstallProtocolInterface (BiosBlockIoDev->Handle, &gEfiBlockIoProtocolGuid, BlockIo, BlockIo);\r | |
673 | return EFI_MEDIA_CHANGED;\r | |
674 | }\r | |
675 | } else if (BiosBlockIoDev->Bios.ErrorCode == BIOS_WRITE_PROTECTED) {\r | |
676 | Media->ReadOnly = TRUE;\r | |
677 | return EFI_WRITE_PROTECTED;\r | |
678 | }\r | |
679 | \r | |
680 | if (Media->RemovableMedia) {\r | |
681 | Media->MediaPresent = FALSE;\r | |
682 | }\r | |
683 | \r | |
684 | return EFI_DEVICE_ERROR;\r | |
685 | }\r | |
686 | \r | |
687 | Media->ReadOnly = FALSE;\r | |
688 | TransferByteSize = NumberOfBlocks * BlockSize;\r | |
689 | BufferSize = BufferSize - TransferByteSize;\r | |
690 | TransferBuffer += TransferByteSize;\r | |
691 | Lba += NumberOfBlocks;\r | |
692 | }\r | |
693 | \r | |
694 | return EFI_SUCCESS;\r | |
695 | }\r | |
696 | \r | |
697 | /**\r | |
698 | Flush the Block Device.\r | |
699 | \r | |
700 | @param This Indicates a pointer to the calling context.\r | |
701 | \r | |
702 | @retval EFI_SUCCESS All outstanding data was written to the device\r | |
703 | @retval EFI_DEVICE_ERROR The device reported an error while writting back the data\r | |
704 | @retval EFI_NO_MEDIA There is no media in the device.\r | |
705 | \r | |
706 | **/\r | |
707 | EFI_STATUS\r | |
708 | EFIAPI\r | |
709 | BiosBlockIoFlushBlocks (\r | |
710 | IN EFI_BLOCK_IO_PROTOCOL *This\r | |
711 | )\r | |
712 | {\r | |
713 | return EFI_SUCCESS;\r | |
714 | }\r | |
715 | \r | |
716 | /**\r | |
717 | Reset the Block Device.\r | |
718 | \r | |
719 | @param This Indicates a pointer to the calling context.\r | |
720 | @param ExtendedVerification Driver may perform diagnostics on reset.\r | |
721 | \r | |
722 | @retval EFI_SUCCESS The device was reset.\r | |
723 | @retval EFI_DEVICE_ERROR The device is not functioning properly and could\r | |
724 | not be reset.\r | |
725 | \r | |
726 | **/\r | |
727 | EFI_STATUS\r | |
728 | EFIAPI\r | |
729 | BiosBlockIoReset (\r | |
730 | IN EFI_BLOCK_IO_PROTOCOL *This,\r | |
731 | IN BOOLEAN ExtendedVerification\r | |
732 | )\r | |
733 | {\r | |
734 | BIOS_BLOCK_IO_DEV *BiosBlockIoDev;\r | |
735 | EFI_IA32_REGISTER_SET Regs;\r | |
736 | UINTN CarryFlag;\r | |
737 | \r | |
738 | BiosBlockIoDev = BIOS_BLOCK_IO_FROM_THIS (This);\r | |
739 | \r | |
740 | ZeroMem (&Regs, sizeof (EFI_IA32_REGISTER_SET));\r | |
741 | \r | |
742 | Regs.H.AH = 0x00;\r | |
743 | Regs.H.DL = BiosBlockIoDev->Bios.Number;\r | |
744 | CarryFlag = BiosBlockIoDev->LegacyBios->Int86 (BiosBlockIoDev->LegacyBios, 0x13, &Regs);\r | |
745 | DEBUG (\r | |
746 | (\r | |
747 | DEBUG_INIT, "BiosBlockIoReset: INT 13 00 DL=%02x : CF=%d AH=%02x\n", BiosBlockIoDev->Bios.Number, CarryFlag,\r | |
748 | Regs.H.AH\r | |
749 | )\r | |
750 | );\r | |
751 | if (CarryFlag != 0) {\r | |
752 | if (Regs.H.AL == BIOS_RESET_FAILED) {\r | |
753 | Regs.H.AH = 0x00;\r | |
754 | Regs.H.DL = BiosBlockIoDev->Bios.Number;\r | |
755 | CarryFlag = BiosBlockIoDev->LegacyBios->Int86 (BiosBlockIoDev->LegacyBios, 0x13, &Regs);\r | |
756 | DEBUG (\r | |
757 | (\r | |
758 | DEBUG_INIT, "BiosBlockIoReset: INT 13 00 DL=%02x : CF=%d AH=%02x\n", BiosBlockIoDev->Bios.Number, CarryFlag,\r | |
759 | Regs.H.AH\r | |
760 | )\r | |
761 | );\r | |
762 | if (CarryFlag != 0) {\r | |
763 | BiosBlockIoDev->Bios.ErrorCode = Regs.H.AH;\r | |
764 | return EFI_DEVICE_ERROR;\r | |
765 | }\r | |
766 | }\r | |
767 | }\r | |
768 | \r | |
769 | return EFI_SUCCESS;\r | |
770 | }\r | |
771 | //\r | |
772 | //\r | |
773 | // These functions need to double buffer all data under 1MB!\r | |
774 | //\r | |
775 | //\r | |
776 | \r | |
777 | /**\r | |
778 | Read BufferSize bytes from Lba into Buffer.\r | |
779 | \r | |
780 | @param This Indicates a pointer to the calling context.\r | |
781 | @param MediaId Id of the media, changes every time the media is replaced.\r | |
782 | @param Lba The starting Logical Block Address to read from\r | |
783 | @param BufferSize Size of Buffer, must be a multiple of device block size.\r | |
784 | @param Buffer A pointer to the destination buffer for the data. The caller is\r | |
785 | responsible for either having implicit or explicit ownership of the buffer.\r | |
786 | \r | |
787 | @retval EFI_SUCCESS The data was read correctly from the device.\r | |
788 | @retval EFI_DEVICE_ERROR The device reported an error while performing the read.\r | |
789 | @retval EFI_NO_MEDIA There is no media in the device.\r | |
790 | @retval EFI_MEDIA_CHANGED The MediaId does not matched the current device.\r | |
791 | @retval EFI_BAD_BUFFER_SIZE The Buffer was not a multiple of the block size of the device.\r | |
792 | @retval EFI_INVALID_PARAMETER The read request contains LBAs that are not valid, \r | |
793 | or the buffer is not on proper alignment.\r | |
794 | \r | |
795 | **/\r | |
796 | EFI_STATUS\r | |
797 | EFIAPI\r | |
798 | Edd11BiosReadBlocks (\r | |
799 | IN EFI_BLOCK_IO_PROTOCOL *This,\r | |
800 | IN UINT32 MediaId,\r | |
801 | IN EFI_LBA Lba,\r | |
802 | IN UINTN BufferSize,\r | |
803 | OUT VOID *Buffer\r | |
804 | )\r | |
805 | {\r | |
806 | EFI_BLOCK_IO_MEDIA *Media;\r | |
807 | BIOS_BLOCK_IO_DEV *BiosBlockIoDev;\r | |
808 | EDD_DEVICE_ADDRESS_PACKET *AddressPacket;\r | |
809 | //\r | |
810 | // I exist only for readability\r | |
811 | //\r | |
812 | EFI_IA32_REGISTER_SET Regs;\r | |
813 | UINT64 TransferBuffer;\r | |
814 | UINTN NumberOfBlocks;\r | |
815 | UINTN TransferByteSize;\r | |
816 | UINTN BlockSize;\r | |
817 | BIOS_LEGACY_DRIVE *Bios;\r | |
818 | UINTN CarryFlag;\r | |
819 | UINTN MaxTransferBlocks;\r | |
820 | EFI_BLOCK_IO_PROTOCOL *BlockIo;\r | |
821 | \r | |
822 | Media = This->Media;\r | |
823 | BlockSize = Media->BlockSize;\r | |
824 | \r | |
825 | ZeroMem (&Regs, sizeof (EFI_IA32_REGISTER_SET));\r | |
826 | \r | |
827 | if (MediaId != Media->MediaId) {\r | |
828 | return EFI_MEDIA_CHANGED;\r | |
829 | }\r | |
830 | \r | |
831 | if (Lba > Media->LastBlock) {\r | |
832 | return EFI_INVALID_PARAMETER;\r | |
833 | }\r | |
834 | \r | |
835 | if ((Lba + (BufferSize / BlockSize) - 1) > Media->LastBlock) {\r | |
836 | return EFI_INVALID_PARAMETER;\r | |
837 | }\r | |
838 | \r | |
839 | if (BufferSize % BlockSize != 0) {\r | |
840 | return EFI_BAD_BUFFER_SIZE;\r | |
841 | }\r | |
842 | \r | |
843 | if (Buffer == NULL) {\r | |
844 | return EFI_INVALID_PARAMETER;\r | |
845 | }\r | |
846 | \r | |
847 | if (BufferSize == 0) {\r | |
848 | return EFI_SUCCESS;\r | |
849 | }\r | |
850 | \r | |
851 | BiosBlockIoDev = BIOS_BLOCK_IO_FROM_THIS (This);\r | |
852 | AddressPacket = mEddBufferUnder1Mb;\r | |
853 | \r | |
854 | MaxTransferBlocks = MAX_EDD11_XFER / BlockSize;\r | |
855 | \r | |
856 | TransferBuffer = (UINT64)(UINTN) mEdd11Buffer;\r | |
857 | for (; BufferSize > 0;) {\r | |
858 | NumberOfBlocks = BufferSize / BlockSize;\r | |
859 | NumberOfBlocks = NumberOfBlocks > MaxTransferBlocks ? MaxTransferBlocks : NumberOfBlocks;\r | |
860 | //\r | |
861 | // Max transfer MaxTransferBlocks\r | |
862 | //\r | |
863 | AddressPacket->PacketSizeInBytes = (UINT8) sizeof (EDD_DEVICE_ADDRESS_PACKET);\r | |
864 | AddressPacket->Zero = 0;\r | |
865 | AddressPacket->NumberOfBlocks = (UINT8) NumberOfBlocks;\r | |
866 | AddressPacket->Zero2 = 0;\r | |
c5493c54 | 867 | //\r |
868 | // TransferBuffer has been 4KB alignment. Normalize TransferBuffer to make offset as 0 in seg:offset\r | |
869 | // format to transfer maximum 127 blocks of data.\r | |
870 | // Otherwise when offset adding data size exceeds 0xFFFF, if OpROM does not normalize TransferBuffer,\r | |
871 | // INT13 function 42H will return data boundary error 09H.\r | |
872 | //\r | |
873 | AddressPacket->SegOffset = (UINT32) ((TransferBuffer >> 4) << 16);\r | |
bcecde14 | 874 | AddressPacket->Lba = (UINT64) Lba;\r |
875 | \r | |
876 | Regs.H.AH = 0x42;\r | |
877 | Regs.H.DL = BiosBlockIoDev->Bios.Number;\r | |
878 | Regs.X.SI = EFI_OFFSET (AddressPacket);\r | |
879 | Regs.X.DS = EFI_SEGMENT (AddressPacket);\r | |
880 | \r | |
881 | CarryFlag = BiosBlockIoDev->LegacyBios->Int86 (BiosBlockIoDev->LegacyBios, 0x13, &Regs);\r | |
882 | DEBUG (\r | |
883 | (\r | |
884 | DEBUG_BLKIO, "Edd11BiosReadBlocks: INT 13 42 DL=%02x : CF=%d AH=%02x : LBA 0x%lx Block(s) %0d \n",\r | |
885 | BiosBlockIoDev->Bios.Number, CarryFlag, Regs.H.AH, Lba, NumberOfBlocks\r | |
886 | )\r | |
887 | );\r | |
888 | Media->MediaPresent = TRUE;\r | |
889 | if (CarryFlag != 0) {\r | |
890 | //\r | |
891 | // Return Error Status\r | |
892 | //\r | |
893 | BiosBlockIoDev->Bios.ErrorCode = Regs.H.AH;\r | |
894 | if (BiosBlockIoDev->Bios.ErrorCode == BIOS_DISK_CHANGED) {\r | |
895 | Media->MediaId++;\r | |
896 | Bios = &BiosBlockIoDev->Bios;\r | |
897 | if (Int13GetDeviceParameters (BiosBlockIoDev, Bios) != 0) {\r | |
898 | if (Int13Extensions (BiosBlockIoDev, Bios) != 0) {\r | |
899 | Media->LastBlock = (EFI_LBA) Bios->Parameters.PhysicalSectors - 1;\r | |
900 | Media->BlockSize = (UINT32) Bios->Parameters.BytesPerSector;\r | |
901 | } else {\r | |
902 | ASSERT (FALSE);\r | |
903 | }\r | |
904 | \r | |
905 | Media->ReadOnly = FALSE;\r | |
906 | gBS->HandleProtocol (BiosBlockIoDev->Handle, &gEfiBlockIoProtocolGuid, (VOID **) &BlockIo);\r | |
907 | gBS->ReinstallProtocolInterface (BiosBlockIoDev->Handle, &gEfiBlockIoProtocolGuid, BlockIo, BlockIo);\r | |
908 | return EFI_MEDIA_CHANGED;\r | |
909 | }\r | |
910 | }\r | |
911 | \r | |
912 | if (Media->RemovableMedia) {\r | |
913 | Media->MediaPresent = FALSE;\r | |
914 | }\r | |
915 | \r | |
916 | return EFI_DEVICE_ERROR;\r | |
917 | }\r | |
918 | \r | |
919 | TransferByteSize = NumberOfBlocks * BlockSize;\r | |
920 | CopyMem (Buffer, (VOID *) (UINTN) TransferBuffer, TransferByteSize);\r | |
921 | BufferSize = BufferSize - TransferByteSize;\r | |
922 | Buffer = (VOID *) ((UINT8 *) Buffer + TransferByteSize);\r | |
923 | Lba += NumberOfBlocks;\r | |
924 | }\r | |
925 | \r | |
926 | return EFI_SUCCESS;\r | |
927 | }\r | |
928 | \r | |
929 | /**\r | |
930 | Write BufferSize bytes from Lba into Buffer.\r | |
931 | \r | |
932 | @param This Indicates a pointer to the calling context.\r | |
933 | @param MediaId The media ID that the write request is for.\r | |
934 | @param Lba The starting logical block address to be written. The caller is\r | |
935 | responsible for writing to only legitimate locations.\r | |
936 | @param BufferSize Size of Buffer, must be a multiple of device block size.\r | |
937 | @param Buffer A pointer to the source buffer for the data.\r | |
938 | \r | |
939 | @retval EFI_SUCCESS The data was written correctly to the device.\r | |
940 | @retval EFI_WRITE_PROTECTED The device can not be written to.\r | |
941 | @retval EFI_DEVICE_ERROR The device reported an error while performing the write.\r | |
942 | @retval EFI_NO_MEDIA There is no media in the device.\r | |
943 | @retval EFI_MEDIA_CHNAGED The MediaId does not matched the current device.\r | |
944 | @retval EFI_BAD_BUFFER_SIZE The Buffer was not a multiple of the block size of the device.\r | |
945 | @retval EFI_INVALID_PARAMETER The write request contains LBAs that are not valid, \r | |
946 | or the buffer is not on proper alignment.\r | |
947 | \r | |
948 | **/\r | |
949 | EFI_STATUS\r | |
950 | EFIAPI\r | |
951 | Edd11BiosWriteBlocks (\r | |
952 | IN EFI_BLOCK_IO_PROTOCOL *This,\r | |
953 | IN UINT32 MediaId,\r | |
954 | IN EFI_LBA Lba,\r | |
955 | IN UINTN BufferSize,\r | |
956 | OUT VOID *Buffer\r | |
957 | )\r | |
958 | {\r | |
959 | EFI_BLOCK_IO_MEDIA *Media;\r | |
960 | BIOS_BLOCK_IO_DEV *BiosBlockIoDev;\r | |
961 | EDD_DEVICE_ADDRESS_PACKET *AddressPacket;\r | |
962 | //\r | |
963 | // I exist only for readability\r | |
964 | //\r | |
965 | EFI_IA32_REGISTER_SET Regs;\r | |
966 | UINT64 TransferBuffer;\r | |
967 | UINTN NumberOfBlocks;\r | |
968 | UINTN TransferByteSize;\r | |
969 | UINTN BlockSize;\r | |
970 | BIOS_LEGACY_DRIVE *Bios;\r | |
971 | UINTN CarryFlag;\r | |
972 | UINTN MaxTransferBlocks;\r | |
973 | EFI_BLOCK_IO_PROTOCOL *BlockIo;\r | |
974 | \r | |
975 | Media = This->Media;\r | |
976 | BlockSize = Media->BlockSize;\r | |
977 | \r | |
978 | ZeroMem (&Regs, sizeof (EFI_IA32_REGISTER_SET));\r | |
979 | \r | |
980 | if (MediaId != Media->MediaId) {\r | |
981 | return EFI_MEDIA_CHANGED;\r | |
982 | }\r | |
983 | \r | |
984 | if (Lba > Media->LastBlock) {\r | |
985 | return EFI_INVALID_PARAMETER;\r | |
986 | }\r | |
987 | \r | |
988 | if ((Lba + (BufferSize / BlockSize) - 1) > Media->LastBlock) {\r | |
989 | return EFI_INVALID_PARAMETER;\r | |
990 | }\r | |
991 | \r | |
992 | if (BufferSize % BlockSize != 0) {\r | |
993 | return EFI_BAD_BUFFER_SIZE;\r | |
994 | }\r | |
995 | \r | |
996 | if (Buffer == NULL) {\r | |
997 | return EFI_INVALID_PARAMETER;\r | |
998 | }\r | |
999 | \r | |
1000 | if (BufferSize == 0) {\r | |
1001 | return EFI_SUCCESS;\r | |
1002 | }\r | |
1003 | \r | |
1004 | BiosBlockIoDev = BIOS_BLOCK_IO_FROM_THIS (This);\r | |
1005 | AddressPacket = mEddBufferUnder1Mb;\r | |
1006 | \r | |
1007 | MaxTransferBlocks = MAX_EDD11_XFER / BlockSize;\r | |
1008 | \r | |
1009 | TransferBuffer = (UINT64)(UINTN) mEdd11Buffer;\r | |
1010 | for (; BufferSize > 0;) {\r | |
1011 | NumberOfBlocks = BufferSize / BlockSize;\r | |
1012 | NumberOfBlocks = NumberOfBlocks > MaxTransferBlocks ? MaxTransferBlocks : NumberOfBlocks;\r | |
1013 | //\r | |
1014 | // Max transfer MaxTransferBlocks\r | |
1015 | //\r | |
1016 | AddressPacket->PacketSizeInBytes = (UINT8) sizeof (EDD_DEVICE_ADDRESS_PACKET);\r | |
1017 | AddressPacket->Zero = 0;\r | |
1018 | AddressPacket->NumberOfBlocks = (UINT8) NumberOfBlocks;\r | |
1019 | AddressPacket->Zero2 = 0;\r | |
c5493c54 | 1020 | //\r |
1021 | // TransferBuffer has been 4KB alignment. Normalize TransferBuffer to make offset as 0 in seg:offset\r | |
1022 | // format to transfer maximum 127 blocks of data.\r | |
1023 | // Otherwise when offset adding data size exceeds 0xFFFF, if OpROM does not normalize TransferBuffer,\r | |
1024 | // INT13 function 42H will return data boundary error 09H.\r | |
1025 | //\r | |
1026 | AddressPacket->SegOffset = (UINT32) ((TransferBuffer >> 4) << 16);\r | |
bcecde14 | 1027 | AddressPacket->Lba = (UINT64) Lba;\r |
1028 | \r | |
1029 | Regs.H.AH = 0x43;\r | |
1030 | Regs.H.AL = 0x00;\r | |
1031 | //\r | |
1032 | // Write Verify disable\r | |
1033 | //\r | |
1034 | Regs.H.DL = BiosBlockIoDev->Bios.Number;\r | |
1035 | Regs.X.SI = EFI_OFFSET (AddressPacket);\r | |
1036 | Regs.X.DS = EFI_SEGMENT (AddressPacket);\r | |
1037 | \r | |
1038 | TransferByteSize = NumberOfBlocks * BlockSize;\r | |
1039 | CopyMem ((VOID *) (UINTN) TransferBuffer, Buffer, TransferByteSize);\r | |
1040 | \r | |
1041 | CarryFlag = BiosBlockIoDev->LegacyBios->Int86 (BiosBlockIoDev->LegacyBios, 0x13, &Regs);\r | |
1042 | DEBUG (\r | |
1043 | (\r | |
1044 | DEBUG_BLKIO, "Edd11BiosWriteBlocks: INT 13 43 DL=%02x : CF=%d AH=%02x\n: LBA 0x%lx Block(s) %0d \n",\r | |
1045 | BiosBlockIoDev->Bios.Number, CarryFlag, Regs.H.AH, Lba, NumberOfBlocks\r | |
1046 | )\r | |
1047 | );\r | |
1048 | Media->MediaPresent = TRUE;\r | |
1049 | if (CarryFlag != 0) {\r | |
1050 | //\r | |
1051 | // Return Error Status\r | |
1052 | //\r | |
1053 | BiosBlockIoDev->Bios.ErrorCode = Regs.H.AH;\r | |
1054 | if (BiosBlockIoDev->Bios.ErrorCode == BIOS_DISK_CHANGED) {\r | |
1055 | Media->MediaId++;\r | |
1056 | Bios = &BiosBlockIoDev->Bios;\r | |
1057 | if (Int13GetDeviceParameters (BiosBlockIoDev, Bios) != 0) {\r | |
1058 | if (Int13Extensions (BiosBlockIoDev, Bios) != 0) {\r | |
1059 | Media->LastBlock = (EFI_LBA) Bios->Parameters.PhysicalSectors - 1;\r | |
1060 | Media->BlockSize = (UINT32) Bios->Parameters.BytesPerSector;\r | |
1061 | } else {\r | |
1062 | ASSERT (FALSE);\r | |
1063 | }\r | |
1064 | \r | |
1065 | Media->ReadOnly = FALSE;\r | |
1066 | gBS->HandleProtocol (BiosBlockIoDev->Handle, &gEfiBlockIoProtocolGuid, (VOID **) &BlockIo);\r | |
1067 | gBS->ReinstallProtocolInterface (BiosBlockIoDev->Handle, &gEfiBlockIoProtocolGuid, BlockIo, BlockIo);\r | |
1068 | return EFI_MEDIA_CHANGED;\r | |
1069 | }\r | |
1070 | } else if (BiosBlockIoDev->Bios.ErrorCode == BIOS_WRITE_PROTECTED) {\r | |
1071 | Media->ReadOnly = TRUE;\r | |
1072 | return EFI_WRITE_PROTECTED;\r | |
1073 | }\r | |
1074 | \r | |
1075 | if (Media->RemovableMedia) {\r | |
1076 | Media->MediaPresent = FALSE;\r | |
1077 | }\r | |
1078 | \r | |
1079 | return EFI_DEVICE_ERROR;\r | |
1080 | }\r | |
1081 | \r | |
1082 | Media->ReadOnly = FALSE;\r | |
1083 | BufferSize = BufferSize - TransferByteSize;\r | |
1084 | Buffer = (VOID *) ((UINT8 *) Buffer + TransferByteSize);\r | |
1085 | Lba += NumberOfBlocks;\r | |
1086 | }\r | |
1087 | \r | |
1088 | return EFI_SUCCESS;\r | |
1089 | }\r | |
1090 | \r | |
1091 | /**\r | |
1092 | Read BufferSize bytes from Lba into Buffer.\r | |
1093 | \r | |
1094 | @param This Indicates a pointer to the calling context.\r | |
1095 | @param MediaId Id of the media, changes every time the media is replaced.\r | |
1096 | @param Lba The starting Logical Block Address to read from\r | |
1097 | @param BufferSize Size of Buffer, must be a multiple of device block size.\r | |
1098 | @param Buffer A pointer to the destination buffer for the data. The caller is\r | |
1099 | responsible for either having implicit or explicit ownership of the buffer.\r | |
1100 | \r | |
1101 | @retval EFI_SUCCESS The data was read correctly from the device.\r | |
1102 | @retval EFI_DEVICE_ERROR The device reported an error while performing the read.\r | |
1103 | @retval EFI_NO_MEDIA There is no media in the device.\r | |
1104 | @retval EFI_MEDIA_CHANGED The MediaId does not matched the current device.\r | |
1105 | @retval EFI_BAD_BUFFER_SIZE The Buffer was not a multiple of the block size of the device.\r | |
1106 | @retval EFI_INVALID_PARAMETER The read request contains LBAs that are not valid, \r | |
1107 | or the buffer is not on proper alignment.\r | |
1108 | \r | |
1109 | **/\r | |
1110 | EFI_STATUS\r | |
1111 | EFIAPI\r | |
1112 | BiosReadLegacyDrive (\r | |
1113 | IN EFI_BLOCK_IO_PROTOCOL *This,\r | |
1114 | IN UINT32 MediaId,\r | |
1115 | IN EFI_LBA Lba,\r | |
1116 | IN UINTN BufferSize,\r | |
1117 | OUT VOID *Buffer\r | |
1118 | )\r | |
1119 | {\r | |
1120 | EFI_BLOCK_IO_MEDIA *Media;\r | |
1121 | BIOS_BLOCK_IO_DEV *BiosBlockIoDev;\r | |
1122 | EFI_IA32_REGISTER_SET Regs;\r | |
1123 | UINTN UpperCylinder;\r | |
1124 | UINTN Temp;\r | |
1125 | UINTN Cylinder;\r | |
1126 | UINTN Head;\r | |
1127 | UINTN Sector;\r | |
1128 | UINTN NumberOfBlocks;\r | |
1129 | UINTN TransferByteSize;\r | |
1130 | UINTN ShortLba;\r | |
1131 | UINTN CheckLba;\r | |
1132 | UINTN BlockSize;\r | |
1133 | BIOS_LEGACY_DRIVE *Bios;\r | |
1134 | UINTN CarryFlag;\r | |
1135 | UINTN Retry;\r | |
1136 | EFI_BLOCK_IO_PROTOCOL *BlockIo;\r | |
1137 | \r | |
1138 | Media = This->Media;\r | |
1139 | BlockSize = Media->BlockSize;\r | |
1140 | \r | |
1141 | ZeroMem (&Regs, sizeof (EFI_IA32_REGISTER_SET));\r | |
1142 | \r | |
1143 | if (MediaId != Media->MediaId) {\r | |
1144 | return EFI_MEDIA_CHANGED;\r | |
1145 | }\r | |
1146 | \r | |
1147 | if (Lba > Media->LastBlock) {\r | |
1148 | return EFI_INVALID_PARAMETER;\r | |
1149 | }\r | |
1150 | \r | |
1151 | if ((Lba + (BufferSize / BlockSize) - 1) > Media->LastBlock) {\r | |
1152 | return EFI_INVALID_PARAMETER;\r | |
1153 | }\r | |
1154 | \r | |
1155 | if (BufferSize % BlockSize != 0) {\r | |
1156 | return EFI_BAD_BUFFER_SIZE;\r | |
1157 | }\r | |
1158 | \r | |
1159 | if (Buffer == NULL) {\r | |
1160 | return EFI_INVALID_PARAMETER;\r | |
1161 | }\r | |
1162 | \r | |
1163 | if (BufferSize == 0) {\r | |
1164 | return EFI_SUCCESS;\r | |
1165 | }\r | |
1166 | \r | |
1167 | BiosBlockIoDev = BIOS_BLOCK_IO_FROM_THIS (This);\r | |
1168 | ShortLba = (UINTN) Lba;\r | |
1169 | \r | |
1170 | while (BufferSize != 0) {\r | |
1171 | //\r | |
1172 | // Compute I/O location in Sector, Head, Cylinder format\r | |
1173 | //\r | |
1174 | Sector = (ShortLba % BiosBlockIoDev->Bios.MaxSector) + 1;\r | |
1175 | Temp = ShortLba / BiosBlockIoDev->Bios.MaxSector;\r | |
1176 | Head = Temp % (BiosBlockIoDev->Bios.MaxHead + 1);\r | |
1177 | Cylinder = Temp / (BiosBlockIoDev->Bios.MaxHead + 1);\r | |
1178 | \r | |
1179 | //\r | |
1180 | // Limit transfer to this Head & Cylinder\r | |
1181 | //\r | |
1182 | NumberOfBlocks = BufferSize / BlockSize;\r | |
1183 | Temp = BiosBlockIoDev->Bios.MaxSector - Sector + 1;\r | |
1184 | NumberOfBlocks = NumberOfBlocks > Temp ? Temp : NumberOfBlocks;\r | |
1185 | \r | |
1186 | Retry = 3;\r | |
1187 | do {\r | |
1188 | //\r | |
1189 | // Perform the IO\r | |
1190 | //\r | |
1191 | Regs.H.AH = 2;\r | |
1192 | Regs.H.AL = (UINT8) NumberOfBlocks;\r | |
1193 | Regs.H.DL = BiosBlockIoDev->Bios.Number;\r | |
1194 | \r | |
1195 | UpperCylinder = (Cylinder & 0x0f00) >> 2;\r | |
1196 | \r | |
1197 | CheckLba = Cylinder * (BiosBlockIoDev->Bios.MaxHead + 1) + Head;\r | |
1198 | CheckLba = CheckLba * BiosBlockIoDev->Bios.MaxSector + Sector - 1;\r | |
1199 | \r | |
1200 | DEBUG (\r | |
1201 | (DEBUG_BLKIO,\r | |
1202 | "RLD: LBA %x (%x), Sector %x (%x), Head %x (%x), Cyl %x, UCyl %x\n",\r | |
1203 | ShortLba,\r | |
1204 | CheckLba,\r | |
1205 | Sector,\r | |
1206 | BiosBlockIoDev->Bios.MaxSector,\r | |
1207 | Head,\r | |
1208 | BiosBlockIoDev->Bios.MaxHead,\r | |
1209 | Cylinder,\r | |
1210 | UpperCylinder)\r | |
1211 | );\r | |
1212 | ASSERT (CheckLba == ShortLba);\r | |
1213 | \r | |
1214 | Regs.H.CL = (UINT8) ((Sector & 0x3f) + (UpperCylinder & 0xff));\r | |
1215 | Regs.H.DH = (UINT8) (Head & 0x3f);\r | |
1216 | Regs.H.CH = (UINT8) (Cylinder & 0xff);\r | |
1217 | \r | |
1218 | Regs.X.BX = EFI_OFFSET (mEdd11Buffer);\r | |
1219 | Regs.X.ES = EFI_SEGMENT (mEdd11Buffer);\r | |
1220 | \r | |
1221 | DEBUG (\r | |
1222 | (DEBUG_BLKIO,\r | |
1223 | "INT 13h: AX:(02%02x) DX:(%02x%02x) CX:(%02x%02x) BX:(%04x) ES:(%04x)\n",\r | |
1224 | Regs.H.AL,\r | |
1225 | (UINT8) (Head & 0x3f),\r | |
1226 | Regs.H.DL,\r | |
1227 | (UINT8) (Cylinder & 0xff),\r | |
1228 | (UINT8) ((Sector & 0x3f) + (UpperCylinder & 0xff)),\r | |
1229 | EFI_OFFSET (mEdd11Buffer),\r | |
1230 | EFI_SEGMENT (mEdd11Buffer))\r | |
1231 | );\r | |
1232 | \r | |
1233 | CarryFlag = BiosBlockIoDev->LegacyBios->Int86 (BiosBlockIoDev->LegacyBios, 0x13, &Regs);\r | |
1234 | DEBUG (\r | |
1235 | (\r | |
1236 | DEBUG_BLKIO, "BiosReadLegacyDrive: INT 13 02 DL=%02x : CF=%d AH=%02x\n", BiosBlockIoDev->Bios.Number,\r | |
1237 | CarryFlag, Regs.H.AH\r | |
1238 | )\r | |
1239 | );\r | |
1240 | Retry--;\r | |
1241 | } while (CarryFlag != 0 && Retry != 0 && Regs.H.AH != BIOS_DISK_CHANGED);\r | |
1242 | \r | |
1243 | Media->MediaPresent = TRUE;\r | |
1244 | if (CarryFlag != 0) {\r | |
1245 | //\r | |
1246 | // Return Error Status\r | |
1247 | //\r | |
1248 | BiosBlockIoDev->Bios.ErrorCode = Regs.H.AH;\r | |
1249 | if (BiosBlockIoDev->Bios.ErrorCode == BIOS_DISK_CHANGED) {\r | |
1250 | Media->MediaId++;\r | |
1251 | Bios = &BiosBlockIoDev->Bios;\r | |
1252 | if (Int13GetDeviceParameters (BiosBlockIoDev, Bios) != 0) {\r | |
1253 | //\r | |
1254 | // If the size of the media changed we need to reset the disk geometry\r | |
1255 | //\r | |
1256 | if (Int13Extensions (BiosBlockIoDev, Bios) != 0) {\r | |
1257 | Media->LastBlock = (EFI_LBA) Bios->Parameters.PhysicalSectors - 1;\r | |
1258 | Media->BlockSize = (UINT32) Bios->Parameters.BytesPerSector;\r | |
1259 | } else {\r | |
1260 | //\r | |
1261 | // Legacy Interfaces\r | |
1262 | //\r | |
1263 | Media->LastBlock = (Bios->MaxHead + 1) * Bios->MaxSector * (Bios->MaxCylinder + 1) - 1;\r | |
1264 | Media->BlockSize = 512;\r | |
1265 | }\r | |
1266 | \r | |
1267 | Media->ReadOnly = FALSE;\r | |
1268 | gBS->HandleProtocol (BiosBlockIoDev->Handle, &gEfiBlockIoProtocolGuid, (VOID **) &BlockIo);\r | |
1269 | gBS->ReinstallProtocolInterface (BiosBlockIoDev->Handle, &gEfiBlockIoProtocolGuid, BlockIo, BlockIo);\r | |
1270 | return EFI_MEDIA_CHANGED;\r | |
1271 | }\r | |
1272 | }\r | |
1273 | \r | |
1274 | if (Media->RemovableMedia) {\r | |
1275 | Media->MediaPresent = FALSE;\r | |
1276 | }\r | |
1277 | \r | |
1278 | return EFI_DEVICE_ERROR;\r | |
1279 | }\r | |
1280 | \r | |
1281 | TransferByteSize = NumberOfBlocks * BlockSize;\r | |
1282 | CopyMem (Buffer, mEdd11Buffer, TransferByteSize);\r | |
1283 | \r | |
1284 | ShortLba = ShortLba + NumberOfBlocks;\r | |
1285 | BufferSize = BufferSize - TransferByteSize;\r | |
1286 | Buffer = (VOID *) ((UINT8 *) Buffer + TransferByteSize);\r | |
1287 | }\r | |
1288 | \r | |
1289 | return EFI_SUCCESS;\r | |
1290 | }\r | |
1291 | \r | |
1292 | /**\r | |
1293 | Write BufferSize bytes from Lba into Buffer.\r | |
1294 | \r | |
1295 | @param This Indicates a pointer to the calling context.\r | |
1296 | @param MediaId The media ID that the write request is for.\r | |
1297 | @param Lba The starting logical block address to be written. The caller is\r | |
1298 | responsible for writing to only legitimate locations.\r | |
1299 | @param BufferSize Size of Buffer, must be a multiple of device block size.\r | |
1300 | @param Buffer A pointer to the source buffer for the data.\r | |
1301 | \r | |
1302 | @retval EFI_SUCCESS The data was written correctly to the device.\r | |
1303 | @retval EFI_WRITE_PROTECTED The device can not be written to.\r | |
1304 | @retval EFI_DEVICE_ERROR The device reported an error while performing the write.\r | |
1305 | @retval EFI_NO_MEDIA There is no media in the device.\r | |
1306 | @retval EFI_MEDIA_CHNAGED The MediaId does not matched the current device.\r | |
1307 | @retval EFI_BAD_BUFFER_SIZE The Buffer was not a multiple of the block size of the device.\r | |
1308 | @retval EFI_INVALID_PARAMETER The write request contains LBAs that are not valid, \r | |
1309 | or the buffer is not on proper alignment.\r | |
1310 | \r | |
1311 | **/\r | |
1312 | EFI_STATUS\r | |
1313 | EFIAPI\r | |
1314 | BiosWriteLegacyDrive (\r | |
1315 | IN EFI_BLOCK_IO_PROTOCOL *This,\r | |
1316 | IN UINT32 MediaId,\r | |
1317 | IN EFI_LBA Lba,\r | |
1318 | IN UINTN BufferSize,\r | |
1319 | OUT VOID *Buffer\r | |
1320 | )\r | |
1321 | {\r | |
1322 | EFI_BLOCK_IO_MEDIA *Media;\r | |
1323 | BIOS_BLOCK_IO_DEV *BiosBlockIoDev;\r | |
1324 | EFI_IA32_REGISTER_SET Regs;\r | |
1325 | UINTN UpperCylinder;\r | |
1326 | UINTN Temp;\r | |
1327 | UINTN Cylinder;\r | |
1328 | UINTN Head;\r | |
1329 | UINTN Sector;\r | |
1330 | UINTN NumberOfBlocks;\r | |
1331 | UINTN TransferByteSize;\r | |
1332 | UINTN ShortLba;\r | |
1333 | UINTN CheckLba;\r | |
1334 | UINTN BlockSize;\r | |
1335 | BIOS_LEGACY_DRIVE *Bios;\r | |
1336 | UINTN CarryFlag;\r | |
1337 | UINTN Retry;\r | |
1338 | EFI_BLOCK_IO_PROTOCOL *BlockIo;\r | |
1339 | \r | |
1340 | Media = This->Media;\r | |
1341 | BlockSize = Media->BlockSize;\r | |
1342 | \r | |
1343 | ZeroMem (&Regs, sizeof (EFI_IA32_REGISTER_SET));\r | |
1344 | \r | |
1345 | if (MediaId != Media->MediaId) {\r | |
1346 | return EFI_MEDIA_CHANGED;\r | |
1347 | }\r | |
1348 | \r | |
1349 | if (Lba > Media->LastBlock) {\r | |
1350 | return EFI_INVALID_PARAMETER;\r | |
1351 | }\r | |
1352 | \r | |
1353 | if ((Lba + (BufferSize / BlockSize) - 1) > Media->LastBlock) {\r | |
1354 | return EFI_INVALID_PARAMETER;\r | |
1355 | }\r | |
1356 | \r | |
1357 | if (BufferSize % BlockSize != 0) {\r | |
1358 | return EFI_BAD_BUFFER_SIZE;\r | |
1359 | }\r | |
1360 | \r | |
1361 | if (Buffer == NULL) {\r | |
1362 | return EFI_INVALID_PARAMETER;\r | |
1363 | }\r | |
1364 | \r | |
1365 | if (BufferSize == 0) {\r | |
1366 | return EFI_SUCCESS;\r | |
1367 | }\r | |
1368 | \r | |
1369 | BiosBlockIoDev = BIOS_BLOCK_IO_FROM_THIS (This);\r | |
1370 | ShortLba = (UINTN) Lba;\r | |
1371 | \r | |
1372 | while (BufferSize != 0) {\r | |
1373 | //\r | |
1374 | // Compute I/O location in Sector, Head, Cylinder format\r | |
1375 | //\r | |
1376 | Sector = (ShortLba % BiosBlockIoDev->Bios.MaxSector) + 1;\r | |
1377 | Temp = ShortLba / BiosBlockIoDev->Bios.MaxSector;\r | |
1378 | Head = Temp % (BiosBlockIoDev->Bios.MaxHead + 1);\r | |
1379 | Cylinder = Temp / (BiosBlockIoDev->Bios.MaxHead + 1);\r | |
1380 | \r | |
1381 | //\r | |
1382 | // Limit transfer to this Head & Cylinder\r | |
1383 | //\r | |
1384 | NumberOfBlocks = BufferSize / BlockSize;\r | |
1385 | Temp = BiosBlockIoDev->Bios.MaxSector - Sector + 1;\r | |
1386 | NumberOfBlocks = NumberOfBlocks > Temp ? Temp : NumberOfBlocks;\r | |
1387 | \r | |
1388 | Retry = 3;\r | |
1389 | do {\r | |
1390 | //\r | |
1391 | // Perform the IO\r | |
1392 | //\r | |
1393 | Regs.H.AH = 3;\r | |
1394 | Regs.H.AL = (UINT8) NumberOfBlocks;\r | |
1395 | Regs.H.DL = BiosBlockIoDev->Bios.Number;\r | |
1396 | \r | |
1397 | UpperCylinder = (Cylinder & 0x0f00) >> 2;\r | |
1398 | \r | |
1399 | CheckLba = Cylinder * (BiosBlockIoDev->Bios.MaxHead + 1) + Head;\r | |
1400 | CheckLba = CheckLba * BiosBlockIoDev->Bios.MaxSector + Sector - 1;\r | |
1401 | \r | |
1402 | DEBUG (\r | |
1403 | (DEBUG_BLKIO,\r | |
1404 | "RLD: LBA %x (%x), Sector %x (%x), Head %x (%x), Cyl %x, UCyl %x\n",\r | |
1405 | ShortLba,\r | |
1406 | CheckLba,\r | |
1407 | Sector,\r | |
1408 | BiosBlockIoDev->Bios.MaxSector,\r | |
1409 | Head,\r | |
1410 | BiosBlockIoDev->Bios.MaxHead,\r | |
1411 | Cylinder,\r | |
1412 | UpperCylinder)\r | |
1413 | );\r | |
1414 | ASSERT (CheckLba == ShortLba);\r | |
1415 | \r | |
1416 | Regs.H.CL = (UINT8) ((Sector & 0x3f) + (UpperCylinder & 0xff));\r | |
1417 | Regs.H.DH = (UINT8) (Head & 0x3f);\r | |
1418 | Regs.H.CH = (UINT8) (Cylinder & 0xff);\r | |
1419 | \r | |
1420 | Regs.X.BX = EFI_OFFSET (mEdd11Buffer);\r | |
1421 | Regs.X.ES = EFI_SEGMENT (mEdd11Buffer);\r | |
1422 | \r | |
1423 | TransferByteSize = NumberOfBlocks * BlockSize;\r | |
1424 | CopyMem (mEdd11Buffer, Buffer, TransferByteSize);\r | |
1425 | \r | |
1426 | DEBUG (\r | |
1427 | (DEBUG_BLKIO,\r | |
1428 | "INT 13h: AX:(03%02x) DX:(%02x%02x) CX:(%02x%02x) BX:(%04x) ES:(%04x)\n",\r | |
1429 | Regs.H.AL,\r | |
1430 | (UINT8) (Head & 0x3f),\r | |
1431 | Regs.H.DL,\r | |
1432 | (UINT8) (Cylinder & 0xff),\r | |
1433 | (UINT8) ((Sector & 0x3f) + (UpperCylinder & 0xff)),\r | |
1434 | EFI_OFFSET (mEdd11Buffer),\r | |
1435 | EFI_SEGMENT (mEdd11Buffer))\r | |
1436 | );\r | |
1437 | \r | |
1438 | CarryFlag = BiosBlockIoDev->LegacyBios->Int86 (BiosBlockIoDev->LegacyBios, 0x13, &Regs);\r | |
1439 | DEBUG (\r | |
1440 | (\r | |
1441 | DEBUG_BLKIO, "BiosWriteLegacyDrive: INT 13 03 DL=%02x : CF=%d AH=%02x\n", BiosBlockIoDev->Bios.Number,\r | |
1442 | CarryFlag, Regs.H.AH\r | |
1443 | )\r | |
1444 | );\r | |
1445 | Retry--;\r | |
1446 | } while (CarryFlag != 0 && Retry != 0 && Regs.H.AH != BIOS_DISK_CHANGED);\r | |
1447 | \r | |
1448 | Media->MediaPresent = TRUE;\r | |
1449 | if (CarryFlag != 0) {\r | |
1450 | //\r | |
1451 | // Return Error Status\r | |
1452 | //\r | |
1453 | BiosBlockIoDev->Bios.ErrorCode = Regs.H.AH;\r | |
1454 | if (BiosBlockIoDev->Bios.ErrorCode == BIOS_DISK_CHANGED) {\r | |
1455 | Media->MediaId++;\r | |
1456 | Bios = &BiosBlockIoDev->Bios;\r | |
1457 | if (Int13GetDeviceParameters (BiosBlockIoDev, Bios) != 0) {\r | |
1458 | if (Int13Extensions (BiosBlockIoDev, Bios) != 0) {\r | |
1459 | Media->LastBlock = (EFI_LBA) Bios->Parameters.PhysicalSectors - 1;\r | |
1460 | Media->BlockSize = (UINT32) Bios->Parameters.BytesPerSector;\r | |
1461 | } else {\r | |
1462 | //\r | |
1463 | // Legacy Interfaces\r | |
1464 | //\r | |
1465 | Media->LastBlock = (Bios->MaxHead + 1) * Bios->MaxSector * (Bios->MaxCylinder + 1) - 1;\r | |
1466 | Media->BlockSize = 512;\r | |
1467 | }\r | |
1468 | //\r | |
1469 | // If the size of the media changed we need to reset the disk geometry\r | |
1470 | //\r | |
1471 | Media->ReadOnly = FALSE;\r | |
1472 | gBS->HandleProtocol (BiosBlockIoDev->Handle, &gEfiBlockIoProtocolGuid, (VOID **) &BlockIo);\r | |
1473 | gBS->ReinstallProtocolInterface (BiosBlockIoDev->Handle, &gEfiBlockIoProtocolGuid, BlockIo, BlockIo);\r | |
1474 | return EFI_MEDIA_CHANGED;\r | |
1475 | }\r | |
1476 | } else if (BiosBlockIoDev->Bios.ErrorCode == BIOS_WRITE_PROTECTED) {\r | |
1477 | Media->ReadOnly = TRUE;\r | |
1478 | return EFI_WRITE_PROTECTED;\r | |
1479 | }\r | |
1480 | \r | |
1481 | if (Media->RemovableMedia) {\r | |
1482 | Media->MediaPresent = FALSE;\r | |
1483 | }\r | |
1484 | \r | |
1485 | return EFI_DEVICE_ERROR;\r | |
1486 | }\r | |
1487 | \r | |
1488 | Media->ReadOnly = FALSE;\r | |
1489 | ShortLba = ShortLba + NumberOfBlocks;\r | |
1490 | BufferSize = BufferSize - TransferByteSize;\r | |
1491 | Buffer = (VOID *) ((UINT8 *) Buffer + TransferByteSize);\r | |
1492 | }\r | |
1493 | \r | |
1494 | return EFI_SUCCESS;\r | |
1495 | }\r |