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add ia32 and x64 direcotry for EdkFvbServiceLib
[mirror_edk2.git] / MdeModulePkg / Universal / Disk / DiskIo / Dxe / DiskIo.c
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1e958721 1/** @file\r
2 DiskIo driver that layers it's self on every Block IO protocol in the system.\r
3 DiskIo converts a block oriented device to a byte oriented device.\r
4\r
5 ReadDisk may have to do reads that are not aligned on sector boundaries.\r
6 There are three cases:\r
7 UnderRun - The first byte is not on a sector boundary or the read request is\r
8 less than a sector in length.\r
9 Aligned - A read of N contiguous sectors.\r
10 OverRun - The last byte is not on a sector boundary.\r
11\r
12 Copyright (c) 2006 - 2007, Intel Corporation \r
13 All rights reserved. This program and the accompanying materials \r
14 are licensed and made available under the terms and conditions of the BSD License \r
15 which accompanies this distribution. The full text of the license may be found at \r
16 http://opensource.org/licenses/bsd-license.php \r
17\r
18 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r
19 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r
20\r
21**/\r
22\r
23#include "DiskIo.h"\r
24\r
25EFI_DRIVER_BINDING_PROTOCOL gDiskIoDriverBinding = {\r
26 DiskIoDriverBindingSupported,\r
27 DiskIoDriverBindingStart,\r
28 DiskIoDriverBindingStop,\r
29 0xa,\r
30 NULL,\r
31 NULL\r
32};\r
33\r
34DISK_IO_PRIVATE_DATA gDiskIoPrivateDataTemplate = {\r
35 DISK_IO_PRIVATE_DATA_SIGNATURE,\r
36 {\r
37 EFI_DISK_IO_PROTOCOL_REVISION,\r
38 DiskIoReadDisk,\r
39 DiskIoWriteDisk\r
40 },\r
41 NULL\r
42};\r
43\r
44\r
45/**\r
46 Test to see if this driver supports ControllerHandle. \r
47\r
48 @param This Protocol instance pointer.\r
49 @param ControllerHandle Handle of device to test\r
50 @param RemainingDevicePath Optional parameter use to pick a specific child\r
51 device to start.\r
52\r
53 @retval EFI_SUCCESS This driver supports this device\r
54 @retval EFI_ALREADY_STARTED This driver is already running on this device\r
55 @retval other This driver does not support this device\r
56\r
57**/\r
58EFI_STATUS\r
59EFIAPI\r
60DiskIoDriverBindingSupported (\r
61 IN EFI_DRIVER_BINDING_PROTOCOL *This,\r
62 IN EFI_HANDLE ControllerHandle,\r
63 IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL\r
64 )\r
65{\r
66 EFI_STATUS Status;\r
67 EFI_BLOCK_IO_PROTOCOL *BlockIo;\r
68\r
69 //\r
70 // Open the IO Abstraction(s) needed to perform the supported test.\r
71 //\r
72 Status = gBS->OpenProtocol (\r
73 ControllerHandle,\r
74 &gEfiBlockIoProtocolGuid,\r
75 (VOID **) &BlockIo,\r
76 This->DriverBindingHandle,\r
77 ControllerHandle,\r
78 EFI_OPEN_PROTOCOL_BY_DRIVER\r
79 );\r
80 if (EFI_ERROR (Status)) {\r
81 return Status;\r
82 }\r
83\r
84 //\r
85 // Close the I/O Abstraction(s) used to perform the supported test.\r
86 //\r
87 gBS->CloseProtocol (\r
88 ControllerHandle,\r
89 &gEfiBlockIoProtocolGuid,\r
90 This->DriverBindingHandle,\r
91 ControllerHandle\r
92 );\r
93 return EFI_SUCCESS;\r
94}\r
95\r
96\r
97/**\r
98 Start this driver on ControllerHandle by opening a Block IO protocol and\r
99 installing a Disk IO protocol on ControllerHandle.\r
100\r
101 @param This Protocol instance pointer.\r
102 @param ControllerHandle Handle of device to bind driver to\r
103 @param RemainingDevicePath Optional parameter use to pick a specific child\r
104 device to start.\r
105\r
106 @retval EFI_SUCCESS This driver is added to ControllerHandle\r
107 @retval EFI_ALREADY_STARTED This driver is already running on ControllerHandle\r
108 @retval other This driver does not support this device\r
109\r
110**/\r
111EFI_STATUS\r
112EFIAPI\r
113DiskIoDriverBindingStart (\r
114 IN EFI_DRIVER_BINDING_PROTOCOL *This,\r
115 IN EFI_HANDLE ControllerHandle,\r
116 IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL\r
117 )\r
118{\r
119 EFI_STATUS Status;\r
120 DISK_IO_PRIVATE_DATA *Private;\r
121\r
122 Private = NULL;\r
123\r
124 //\r
125 // Connect to the Block IO interface on ControllerHandle.\r
126 //\r
127 Status = gBS->OpenProtocol (\r
128 ControllerHandle,\r
129 &gEfiBlockIoProtocolGuid,\r
130 (VOID **) &gDiskIoPrivateDataTemplate.BlockIo,\r
131 This->DriverBindingHandle,\r
132 ControllerHandle,\r
133 EFI_OPEN_PROTOCOL_BY_DRIVER\r
134 );\r
135 if (EFI_ERROR (Status)) {\r
136 return Status;\r
137 }\r
138 \r
139 //\r
140 // Initialize the Disk IO device instance.\r
141 //\r
142 Private = AllocateCopyPool (sizeof (DISK_IO_PRIVATE_DATA), &gDiskIoPrivateDataTemplate);\r
143 if (Private == NULL) {\r
144 Status = EFI_OUT_OF_RESOURCES;\r
145 goto ErrorExit;\r
146 }\r
147 \r
148 //\r
149 // Install protocol interfaces for the Disk IO device.\r
150 //\r
151 Status = gBS->InstallProtocolInterface (\r
152 &ControllerHandle,\r
153 &gEfiDiskIoProtocolGuid,\r
154 EFI_NATIVE_INTERFACE,\r
155 &Private->DiskIo\r
156 );\r
157\r
158ErrorExit:\r
159 if (EFI_ERROR (Status)) {\r
160\r
161 if (Private != NULL) {\r
162 FreePool (Private);\r
163 }\r
164\r
165 gBS->CloseProtocol (\r
166 ControllerHandle,\r
167 &gEfiBlockIoProtocolGuid,\r
168 This->DriverBindingHandle,\r
169 ControllerHandle\r
170 );\r
171 }\r
172\r
173 return Status;\r
174}\r
175\r
176\r
177/**\r
178 Stop this driver on ControllerHandle by removing Disk IO protocol and closing\r
179 the Block IO protocol on ControllerHandle.\r
180\r
181 @param This Protocol instance pointer.\r
182 @param ControllerHandle Handle of device to stop driver on\r
183 @param NumberOfChildren Number of Handles in ChildHandleBuffer. If number of\r
184 children is zero stop the entire bus driver.\r
185 @param ChildHandleBuffer List of Child Handles to Stop.\r
186\r
187 @retval EFI_SUCCESS This driver is removed ControllerHandle\r
188 @retval other This driver was not removed from this device\r
189\r
190**/\r
191EFI_STATUS\r
192EFIAPI\r
193DiskIoDriverBindingStop (\r
194 IN EFI_DRIVER_BINDING_PROTOCOL *This,\r
195 IN EFI_HANDLE ControllerHandle,\r
196 IN UINTN NumberOfChildren,\r
197 IN EFI_HANDLE *ChildHandleBuffer\r
198 )\r
199{\r
200 EFI_STATUS Status;\r
201 EFI_DISK_IO_PROTOCOL *DiskIo;\r
202 DISK_IO_PRIVATE_DATA *Private;\r
203\r
204 //\r
205 // Get our context back.\r
206 //\r
207 Status = gBS->OpenProtocol (\r
208 ControllerHandle,\r
209 &gEfiDiskIoProtocolGuid,\r
210 (VOID **) &DiskIo,\r
211 This->DriverBindingHandle,\r
212 ControllerHandle,\r
213 EFI_OPEN_PROTOCOL_GET_PROTOCOL\r
214 );\r
215 if (EFI_ERROR (Status)) {\r
216 return EFI_UNSUPPORTED;\r
217 }\r
218\r
219 Private = DISK_IO_PRIVATE_DATA_FROM_THIS (DiskIo);\r
220\r
221 Status = gBS->UninstallProtocolInterface (\r
222 ControllerHandle,\r
223 &gEfiDiskIoProtocolGuid,\r
224 &Private->DiskIo\r
225 );\r
226 if (!EFI_ERROR (Status)) {\r
227\r
228 Status = gBS->CloseProtocol (\r
229 ControllerHandle,\r
230 &gEfiBlockIoProtocolGuid,\r
231 This->DriverBindingHandle,\r
232 ControllerHandle\r
233 );\r
234 }\r
235\r
236 if (!EFI_ERROR (Status)) {\r
237 FreePool (Private);\r
238 }\r
239\r
240 return Status;\r
241}\r
242\r
243\r
244\r
245/**\r
246 Read BufferSize bytes from Offset into Buffer.\r
247 Reads may support reads that are not aligned on\r
248 sector boundaries. There are three cases:\r
249 UnderRun - The first byte is not on a sector boundary or the read request is\r
250 less than a sector in length.\r
251 Aligned - A read of N contiguous sectors.\r
252 OverRun - The last byte is not on a sector boundary.\r
253\r
254 @param This Protocol instance pointer.\r
255 @param MediaId Id of the media, changes every time the media is replaced.\r
256 @param Offset The starting byte offset to read from\r
257 @param BufferSize Size of Buffer\r
258 @param Buffer Buffer containing read data\r
259\r
260 @retval EFI_SUCCESS The data was read correctly from the device.\r
261 @retval EFI_DEVICE_ERROR The device reported an error while performing the read.\r
262 @retval EFI_NO_MEDIA There is no media in the device.\r
263 @retval EFI_MEDIA_CHNAGED The MediaId does not matched the current device.\r
264 @retval EFI_INVALID_PARAMETER The read request contains device addresses that are not\r
265 valid for the device.\r
266\r
267**/\r
268EFI_STATUS\r
269EFIAPI\r
270DiskIoReadDisk (\r
271 IN EFI_DISK_IO_PROTOCOL *This,\r
272 IN UINT32 MediaId,\r
273 IN UINT64 Offset,\r
274 IN UINTN BufferSize,\r
275 OUT VOID *Buffer\r
276 )\r
277{\r
278 EFI_STATUS Status;\r
279 DISK_IO_PRIVATE_DATA *Private;\r
280 EFI_BLOCK_IO_PROTOCOL *BlockIo;\r
281 EFI_BLOCK_IO_MEDIA *Media;\r
282 UINT32 BlockSize;\r
283 UINT64 Lba;\r
284 UINT64 OverRunLba;\r
285 UINT32 UnderRun;\r
286 UINT32 OverRun;\r
287 BOOLEAN TransactionComplete;\r
288 UINTN WorkingBufferSize;\r
289 UINT8 *WorkingBuffer;\r
290 UINTN Length;\r
291 UINT8 *Data;\r
292 UINT8 *PreData;\r
293 UINTN IsBufferAligned;\r
294 UINTN DataBufferSize;\r
295 BOOLEAN LastRead;\r
296\r
297 Private = DISK_IO_PRIVATE_DATA_FROM_THIS (This);\r
298\r
299 BlockIo = Private->BlockIo;\r
300 Media = BlockIo->Media;\r
301 BlockSize = Media->BlockSize;\r
302\r
303 if (Media->MediaId != MediaId) {\r
304 return EFI_MEDIA_CHANGED;\r
305 }\r
306\r
307 WorkingBuffer = Buffer;\r
308 WorkingBufferSize = BufferSize;\r
309\r
310 //\r
311 // Allocate a temporary buffer for operation\r
312 //\r
313 DataBufferSize = BlockSize * DATA_BUFFER_BLOCK_NUM;\r
314\r
315 if (Media->IoAlign > 1) {\r
316 PreData = AllocatePool (DataBufferSize + Media->IoAlign);\r
317 Data = PreData - ((UINTN) PreData & (Media->IoAlign - 1)) + Media->IoAlign;\r
318 } else {\r
319 PreData = AllocatePool (DataBufferSize);\r
320 Data = PreData;\r
321 }\r
322\r
323 if (PreData == NULL) {\r
324 return EFI_OUT_OF_RESOURCES;\r
325 }\r
326\r
327 Lba = DivU64x32Remainder (Offset, BlockSize, &UnderRun);\r
328\r
329 Length = BlockSize - UnderRun;\r
330 TransactionComplete = FALSE;\r
331\r
332 Status = EFI_SUCCESS;\r
333 if (UnderRun != 0) {\r
334 //\r
335 // Offset starts in the middle of an Lba, so read the entire block.\r
336 //\r
337 Status = BlockIo->ReadBlocks (\r
338 BlockIo,\r
339 MediaId,\r
340 Lba,\r
341 BlockSize,\r
342 Data\r
343 );\r
344\r
345 if (EFI_ERROR (Status)) {\r
346 goto Done;\r
347 }\r
348\r
349 if (Length > BufferSize) {\r
350 Length = BufferSize;\r
351 TransactionComplete = TRUE;\r
352 }\r
353\r
354 CopyMem (WorkingBuffer, Data + UnderRun, Length);\r
355\r
356 WorkingBuffer += Length;\r
357\r
358 WorkingBufferSize -= Length;\r
359 if (WorkingBufferSize == 0) {\r
360 goto Done;\r
361 }\r
362\r
363 Lba += 1;\r
364 }\r
365\r
366 OverRunLba = Lba + DivU64x32Remainder (WorkingBufferSize, BlockSize, &OverRun);\r
367\r
368 if (!TransactionComplete && WorkingBufferSize >= BlockSize) {\r
369 //\r
370 // If the DiskIo maps directly to a BlockIo device do the read.\r
371 //\r
372 if (OverRun != 0) {\r
373 WorkingBufferSize -= OverRun;\r
374 }\r
375 //\r
376 // Check buffer alignment\r
377 //\r
378 IsBufferAligned = (UINTN) WorkingBuffer & (UINTN) (Media->IoAlign - 1);\r
379\r
380 if (Media->IoAlign <= 1 || IsBufferAligned == 0) {\r
381 //\r
382 // Alignment is satisfied, so read them together\r
383 //\r
384 Status = BlockIo->ReadBlocks (\r
385 BlockIo,\r
386 MediaId,\r
387 Lba,\r
388 WorkingBufferSize,\r
389 WorkingBuffer\r
390 );\r
391\r
392 if (EFI_ERROR (Status)) {\r
393 goto Done;\r
394 }\r
395\r
396 WorkingBuffer += WorkingBufferSize;\r
397\r
398 } else {\r
399 //\r
400 // Use the allocated buffer instead of the original buffer\r
401 // to avoid alignment issue.\r
402 // Here, the allocated buffer (8-byte align) can satisfy the alignment\r
403 //\r
404 LastRead = FALSE;\r
405 do {\r
406 if (WorkingBufferSize <= DataBufferSize) {\r
407 //\r
408 // It is the last calling to readblocks in this loop\r
409 //\r
410 DataBufferSize = WorkingBufferSize;\r
411 LastRead = TRUE;\r
412 }\r
413\r
414 Status = BlockIo->ReadBlocks (\r
415 BlockIo,\r
416 MediaId,\r
417 Lba,\r
418 DataBufferSize,\r
419 Data\r
420 );\r
421 if (EFI_ERROR (Status)) {\r
422 goto Done;\r
423 }\r
424\r
425 CopyMem (WorkingBuffer, Data, DataBufferSize);\r
426 WorkingBufferSize -= DataBufferSize;\r
427 WorkingBuffer += DataBufferSize;\r
428 Lba += DATA_BUFFER_BLOCK_NUM;\r
429 } while (!LastRead);\r
430 }\r
431 }\r
432\r
433 if (!TransactionComplete && OverRun != 0) {\r
434 //\r
435 // Last read is not a complete block.\r
436 //\r
437 Status = BlockIo->ReadBlocks (\r
438 BlockIo,\r
439 MediaId,\r
440 OverRunLba,\r
441 BlockSize,\r
442 Data\r
443 );\r
444\r
445 if (EFI_ERROR (Status)) {\r
446 goto Done;\r
447 }\r
448\r
449 CopyMem (WorkingBuffer, Data, OverRun);\r
450 }\r
451\r
452Done:\r
453 if (PreData != NULL) {\r
454 FreePool (PreData);\r
455 }\r
456\r
457 return Status;\r
458}\r
459\r
460\r
461/**\r
462 Read BufferSize bytes from Offset into Buffer.\r
463 Writes may require a read modify write to support writes that are not\r
464 aligned on sector boundaries. There are three cases:\r
465 UnderRun - The first byte is not on a sector boundary or the write request\r
466 is less than a sector in length. Read modify write is required.\r
467 Aligned - A write of N contiguous sectors.\r
468 OverRun - The last byte is not on a sector boundary. Read modified write\r
469 required.\r
470\r
471 @param This Protocol instance pointer.\r
472 @param MediaId Id of the media, changes every time the media is replaced.\r
473 @param Offset The starting byte offset to read from\r
474 @param BufferSize Size of Buffer\r
475 @param Buffer Buffer containing read data\r
476\r
477 @retval EFI_SUCCESS The data was written correctly to the device.\r
478 @retval EFI_WRITE_PROTECTED The device can not be written to.\r
479 @retval EFI_DEVICE_ERROR The device reported an error while performing the write.\r
480 @retval EFI_NO_MEDIA There is no media in the device.\r
481 @retval EFI_MEDIA_CHNAGED The MediaId does not matched the current device.\r
482 @retval EFI_INVALID_PARAMETER The write request contains device addresses that are not\r
483 valid for the device.\r
484\r
485**/\r
486EFI_STATUS\r
487EFIAPI\r
488DiskIoWriteDisk (\r
489 IN EFI_DISK_IO_PROTOCOL *This,\r
490 IN UINT32 MediaId,\r
491 IN UINT64 Offset,\r
492 IN UINTN BufferSize,\r
493 IN VOID *Buffer\r
494 )\r
495{\r
496 EFI_STATUS Status;\r
497 DISK_IO_PRIVATE_DATA *Private;\r
498 EFI_BLOCK_IO_PROTOCOL *BlockIo;\r
499 EFI_BLOCK_IO_MEDIA *Media;\r
500 UINT32 BlockSize;\r
501 UINT64 Lba;\r
502 UINT64 OverRunLba;\r
503 UINT32 UnderRun;\r
504 UINT32 OverRun;\r
505 BOOLEAN TransactionComplete;\r
506 UINTN WorkingBufferSize;\r
507 UINT8 *WorkingBuffer;\r
508 UINTN Length;\r
509 UINT8 *Data;\r
510 UINT8 *PreData;\r
511 UINTN IsBufferAligned;\r
512 UINTN DataBufferSize;\r
513 BOOLEAN LastWrite;\r
514\r
515 Private = DISK_IO_PRIVATE_DATA_FROM_THIS (This);\r
516\r
517 BlockIo = Private->BlockIo;\r
518 Media = BlockIo->Media;\r
519 BlockSize = Media->BlockSize;\r
520\r
521 if (Media->ReadOnly) {\r
522 return EFI_WRITE_PROTECTED;\r
523 }\r
524\r
525 if (Media->MediaId != MediaId) {\r
526 return EFI_MEDIA_CHANGED;\r
527 }\r
528\r
529 DataBufferSize = BlockSize * DATA_BUFFER_BLOCK_NUM;\r
530\r
531 if (Media->IoAlign > 1) {\r
532 PreData = AllocatePool (DataBufferSize + Media->IoAlign);\r
533 Data = PreData - ((UINTN) PreData & (Media->IoAlign - 1)) + Media->IoAlign;\r
534 } else {\r
535 PreData = AllocatePool (DataBufferSize);\r
536 Data = PreData;\r
537 }\r
538\r
539 if (PreData == NULL) {\r
540 return EFI_OUT_OF_RESOURCES;\r
541 }\r
542\r
543 WorkingBuffer = Buffer;\r
544 WorkingBufferSize = BufferSize;\r
545\r
546 Lba = DivU64x32Remainder (Offset, BlockSize, &UnderRun);\r
547\r
548 Length = BlockSize - UnderRun;\r
549 TransactionComplete = FALSE;\r
550\r
551 Status = EFI_SUCCESS;\r
552 if (UnderRun != 0) {\r
553 //\r
554 // Offset starts in the middle of an Lba, so do read modify write.\r
555 //\r
556 Status = BlockIo->ReadBlocks (\r
557 BlockIo,\r
558 MediaId,\r
559 Lba,\r
560 BlockSize,\r
561 Data\r
562 );\r
563\r
564 if (EFI_ERROR (Status)) {\r
565 goto Done;\r
566 }\r
567\r
568 if (Length > BufferSize) {\r
569 Length = BufferSize;\r
570 TransactionComplete = TRUE;\r
571 }\r
572\r
573 CopyMem (Data + UnderRun, WorkingBuffer, Length);\r
574\r
575 Status = BlockIo->WriteBlocks (\r
576 BlockIo,\r
577 MediaId,\r
578 Lba,\r
579 BlockSize,\r
580 Data\r
581 );\r
582 if (EFI_ERROR (Status)) {\r
583 goto Done;\r
584 }\r
585\r
586 WorkingBuffer += Length;\r
587 WorkingBufferSize -= Length;\r
588 if (WorkingBufferSize == 0) {\r
589 goto Done;\r
590 }\r
591\r
592 Lba += 1;\r
593 }\r
594\r
595 OverRunLba = Lba + DivU64x32Remainder (WorkingBufferSize, BlockSize, &OverRun);\r
596\r
597 if (!TransactionComplete && WorkingBufferSize >= BlockSize) {\r
598 //\r
599 // If the DiskIo maps directly to a BlockIo device do the write.\r
600 //\r
601 if (OverRun != 0) {\r
602 WorkingBufferSize -= OverRun;\r
603 }\r
604 //\r
605 // Check buffer alignment\r
606 //\r
607 IsBufferAligned = (UINTN) WorkingBuffer & (UINTN) (Media->IoAlign - 1);\r
608\r
609 if (Media->IoAlign <= 1 || IsBufferAligned == 0) {\r
610 //\r
611 // Alignment is satisfied, so write them together\r
612 //\r
613 Status = BlockIo->WriteBlocks (\r
614 BlockIo,\r
615 MediaId,\r
616 Lba,\r
617 WorkingBufferSize,\r
618 WorkingBuffer\r
619 );\r
620\r
621 if (EFI_ERROR (Status)) {\r
622 goto Done;\r
623 }\r
624\r
625 WorkingBuffer += WorkingBufferSize;\r
626\r
627 } else {\r
628 //\r
629 // The buffer parameter is not aligned with the request\r
630 // So use the allocated instead.\r
631 // It can fit almost all the cases.\r
632 //\r
633 LastWrite = FALSE;\r
634 do {\r
635 if (WorkingBufferSize <= DataBufferSize) {\r
636 //\r
637 // It is the last calling to writeblocks in this loop\r
638 //\r
639 DataBufferSize = WorkingBufferSize;\r
640 LastWrite = TRUE;\r
641 }\r
642\r
643 CopyMem (Data, WorkingBuffer, DataBufferSize);\r
644 Status = BlockIo->WriteBlocks (\r
645 BlockIo,\r
646 MediaId,\r
647 Lba,\r
648 DataBufferSize,\r
649 Data\r
650 );\r
651 if (EFI_ERROR (Status)) {\r
652 goto Done;\r
653 }\r
654\r
655 WorkingBufferSize -= DataBufferSize;\r
656 WorkingBuffer += DataBufferSize;\r
657 Lba += DATA_BUFFER_BLOCK_NUM;\r
658 } while (!LastWrite);\r
659 }\r
660 }\r
661\r
662 if (!TransactionComplete && OverRun != 0) {\r
663 //\r
664 // Last bit is not a complete block, so do a read modify write.\r
665 //\r
666 Status = BlockIo->ReadBlocks (\r
667 BlockIo,\r
668 MediaId,\r
669 OverRunLba,\r
670 BlockSize,\r
671 Data\r
672 );\r
673\r
674 if (EFI_ERROR (Status)) {\r
675 goto Done;\r
676 }\r
677\r
678 CopyMem (Data, WorkingBuffer, OverRun);\r
679\r
680 Status = BlockIo->WriteBlocks (\r
681 BlockIo,\r
682 MediaId,\r
683 OverRunLba,\r
684 BlockSize,\r
685 Data\r
686 );\r
687 if (EFI_ERROR (Status)) {\r
688 goto Done;\r
689 }\r
690 }\r
691\r
692Done:\r
693 if (PreData != NULL) {\r
694 FreePool (PreData);\r
695 }\r
696\r
697 return Status;\r
698}\r
699\r
700\r
701/**\r
702 The user Entry Point for module DiskIo. The user code starts with this function.\r
703\r
704 @param[in] ImageHandle The firmware allocated handle for the EFI image. \r
705 @param[in] SystemTable A pointer to the EFI System Table.\r
706 \r
707 @retval EFI_SUCCESS The entry point is executed successfully.\r
708 @retval other Some error occurs when executing this entry point.\r
709\r
710**/\r
711EFI_STATUS\r
712EFIAPI\r
713InitializeDiskIo (\r
714 IN EFI_HANDLE ImageHandle,\r
715 IN EFI_SYSTEM_TABLE *SystemTable\r
716 )\r
717{\r
718 EFI_STATUS Status;\r
719\r
720 //\r
721 // Install driver model protocol(s).\r
722 //\r
723 Status = EfiLibInstallAllDriverProtocols (\r
724 ImageHandle,\r
725 SystemTable,\r
726 &gDiskIoDriverBinding,\r
727 ImageHandle,\r
728 &gDiskIoComponentName,\r
729 NULL,\r
730 NULL\r
731 );\r
732 ASSERT_EFI_ERROR (Status);\r
733\r
734\r
735 return Status;\r
736}\r
737\r
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