1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
|
/*+++
Copyright (c) 2006, Intel Corporation
All rights reserved. This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
Module Name:
UnixBusDriver.c
Abstract:
This following section documents the envirnoment variables for the Win UNIX
build. These variables are used to define the (virtual) hardware
configuration of the UNIX environment
A ! can be used to seperate multiple instances in a variable. Each
instance represents a seperate hardware device.
EFI_UNIX_PHYSICAL_DISKS - maps to drives on your system
EFI_UNIX_VIRTUAL_DISKS - maps to a device emulated by a file
EFI_UNIX_FILE_SYSTEM - mouts a directory as a file system
EFI_UNIX_CONSOLE - make a logical comand line window (only one!)
EFI_UNIX_UGA - Builds UGA Windows of Width and Height
<F>ixed - Fixed disk like a hard drive.
<R>emovable - Removable media like a floppy or CD-ROM.
Read <O>nly - Write protected device.
Read <W>rite - Read write device.
<block count> - Decimal number of blocks a device supports.
<block size> - Decimal number of bytes per block.
UNIX envirnonment variable contents. '<' and '>' are not part of the variable,
they are just used to make this help more readable. There should be no
spaces between the ';'. Extra spaces will break the variable. A '!' is
used to seperate multiple devices in a variable.
EFI_UNIX_VIRTUAL_DISKS =
<F | R><O | W>;<block count>;<block size>[!...]
EFI_UNIX_PHYSICAL_DISKS =
<drive letter>:<F | R><O | W>;<block count>;<block size>[!...]
Virtual Disks: These devices use a file to emulate a hard disk or removable
media device.
Thus a 20 MB emulated hard drive would look like:
EFI_UNIX_VIRTUAL_DISKS=FW;40960;512
A 1.44MB emulated floppy with a block size of 1024 would look like:
EFI_UNIX_VIRTUAL_DISKS=RW;1440;1024
Physical Disks: These devices use UNIX to open a real device in your system
Thus a 120 MB floppy would look like:
EFI_UNIX_PHYSICAL_DISKS=B:RW;245760;512
Thus a standard CD-ROM floppy would look like:
EFI_UNIX_PHYSICAL_DISKS=Z:RO;307200;2048
EFI_UNIX_FILE_SYSTEM =
<directory path>[!...]
Mounting the two directories C:\FOO and C:\BAR would look like:
EFI_UNIX_FILE_SYSTEM=c:\foo!c:\bar
EFI_UNIX_CONSOLE =
<window title>
Declaring a text console window with the title "My EFI Console" woild look like:
EFI_UNIX_CONSOLE=My EFI Console
EFI_UNIX_UGA =
<width> <height>[!...]
Declaring a two UGA windows with resolutions of 800x600 and 1024x768 would look like:
Example : EFI_UNIX_UGA=800 600!1024 768
EFI_UNIX_PASS_THROUGH =
<BaseAddress>;<Bus#>;<Device#>;<Function#>
Declaring a base address of 0xE0000000 (used for PCI Express devices)
and having NT32 talk to a device located at bus 0, device 1, function 0:
Example : EFI_UNIX_PASS_THROUGH=E000000;0;1;0
---*/
#include "UnixBusDriver.h"
//#include "PciHostBridge.h"
//
// Define GUID for the Unix Bus Driver
//
static EFI_GUID gUnixBusDriverGuid = {
0x419f582, 0x625, 0x4531, {0x8a, 0x33, 0x85, 0xa9, 0x96, 0x5c, 0x95, 0xbc}
};
//
// DriverBinding protocol global
//
EFI_DRIVER_BINDING_PROTOCOL gUnixBusDriverBinding = {
UnixBusDriverBindingSupported,
UnixBusDriverBindingStart,
UnixBusDriverBindingStop,
0xa,
NULL,
NULL
};
#define UNIX_PCD_ARRAY_SIZE (sizeof(mPcdEnvironment)/sizeof(UNIX_PCD_ENTRY))
//
// Table to map UNIX Environment variable to the GUID that should be in
// device path.
//
static UNIX_PCD_ENTRY mPcdEnvironment[] = {
{PcdToken(PcdUnixConsole), &gEfiUnixConsoleGuid},
{PcdToken(PcdUnixUga), &gEfiUnixUgaGuid},
{PcdToken(PcdUnixFileSystem), &gEfiUnixFileSystemGuid},
{PcdToken(PcdUnixVirtualDisk), &gEfiUnixVirtualDisksGuid},
{PcdToken(PcdUnixPhysicalDisk), &gEfiUnixPhysicalDisksGuid},
{PcdToken(PcdUnixCpuModel), &gEfiUnixCPUModelGuid},
{PcdToken(PcdUnixCpuSpeed), &gEfiUnixCPUSpeedGuid},
{PcdToken(PcdUnixMemorySize), &gEfiUnixMemoryGuid}
};
VOID *
AllocateMemory (
IN UINTN Size
)
{
EFI_STATUS Status;
VOID *Buffer;
Status = gBS->AllocatePool (
EfiBootServicesData,
Size,
(VOID *)&Buffer
);
if (EFI_ERROR (Status)) {
ASSERT (FALSE);
return NULL;
}
return Buffer;
}
EFI_STATUS
EFIAPI
UnixBusDriverBindingSupported (
IN EFI_DRIVER_BINDING_PROTOCOL *This,
IN EFI_HANDLE ControllerHandle,
IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath
)
/*++
Routine Description:
Arguments:
Returns:
None
--*/
// TODO: This - add argument and description to function comment
// TODO: ControllerHandle - add argument and description to function comment
// TODO: RemainingDevicePath - add argument and description to function comment
// TODO: EFI_UNSUPPORTED - add return value to function comment
// TODO: EFI_UNSUPPORTED - add return value to function comment
// TODO: EFI_SUCCESS - add return value to function comment
// TODO: EFI_SUCCESS - add return value to function comment
{
EFI_STATUS Status;
EFI_DEVICE_PATH_PROTOCOL *ParentDevicePath;
EFI_UNIX_THUNK_PROTOCOL *UnixThunk;
UINTN Index;
//
// Check the contents of the first Device Path Node of RemainingDevicePath to make sure
// it is a legal Device Path Node for this bus driver's children.
//
if (RemainingDevicePath != NULL) {
if (RemainingDevicePath->Type != HARDWARE_DEVICE_PATH ||
RemainingDevicePath->SubType != HW_VENDOR_DP ||
DevicePathNodeLength(RemainingDevicePath) != sizeof(UNIX_VENDOR_DEVICE_PATH_NODE)) {
return EFI_UNSUPPORTED;
}
for (Index = 0; Index < UNIX_PCD_ARRAY_SIZE; Index++) {
if (CompareGuid (&((VENDOR_DEVICE_PATH *) RemainingDevicePath)->Guid, mPcdEnvironment[Index].DevicePathGuid)) {
break;
}
}
if (Index >= UNIX_PCD_ARRAY_SIZE) {
return EFI_UNSUPPORTED;
}
}
//
// Open the IO Abstraction(s) needed to perform the supported test
//
Status = gBS->OpenProtocol (
ControllerHandle,
&gEfiDevicePathProtocolGuid,
(VOID **)&ParentDevicePath,
This->DriverBindingHandle,
ControllerHandle,
EFI_OPEN_PROTOCOL_BY_DRIVER
);
if (Status == EFI_ALREADY_STARTED) {
return EFI_SUCCESS;
}
if (EFI_ERROR (Status)) {
return Status;
}
gBS->CloseProtocol (
ControllerHandle,
&gEfiDevicePathProtocolGuid,
This->DriverBindingHandle,
ControllerHandle
);
Status = gBS->OpenProtocol (
ControllerHandle,
&gEfiUnixThunkProtocolGuid,
(VOID **)&UnixThunk,
This->DriverBindingHandle,
ControllerHandle,
EFI_OPEN_PROTOCOL_BY_DRIVER
);
if (Status == EFI_ALREADY_STARTED) {
return EFI_SUCCESS;
}
if (EFI_ERROR (Status)) {
return Status;
}
//
// Since we call through UnixThunk we need to make sure it's valid
//
Status = EFI_SUCCESS;
if (UnixThunk->Signature != EFI_UNIX_THUNK_PROTOCOL_SIGNATURE) {
Status = EFI_UNSUPPORTED;
}
//
// Close the I/O Abstraction(s) used to perform the supported test
//
gBS->CloseProtocol (
ControllerHandle,
&gEfiUnixThunkProtocolGuid,
This->DriverBindingHandle,
ControllerHandle
);
return Status;
}
EFI_STATUS
EFIAPI
UnixBusDriverBindingStart (
IN EFI_DRIVER_BINDING_PROTOCOL *This,
IN EFI_HANDLE ControllerHandle,
IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath
)
/*++
Routine Description:
Arguments:
Returns:
None
--*/
// TODO: This - add argument and description to function comment
// TODO: ControllerHandle - add argument and description to function comment
// TODO: RemainingDevicePath - add argument and description to function comment
// TODO: EFI_OUT_OF_RESOURCES - add return value to function comment
// TODO: EFI_OUT_OF_RESOURCES - add return value to function comment
// TODO: EFI_SUCCESS - add return value to function comment
{
EFI_STATUS Status;
EFI_STATUS InstallStatus;
EFI_UNIX_THUNK_PROTOCOL *UnixThunk;
EFI_DEVICE_PATH_PROTOCOL *ParentDevicePath;
UNIX_BUS_DEVICE *UnixBusDevice;
UNIX_IO_DEVICE *UnixDevice;
UINTN Index;
CHAR16 *StartString;
CHAR16 *SubString;
UINT16 Count;
UINTN StringSize;
UINT16 ComponentName[MAX_UNIX_ENVIRNMENT_VARIABLE_LENGTH];
UNIX_VENDOR_DEVICE_PATH_NODE *Node;
BOOLEAN CreateDevice;
CHAR16 *TempStr;
CHAR16 *PcdTempStr;
UINTN TempStrSize;
Status = EFI_UNSUPPORTED;
//
// Grab the protocols we need
//
Status = gBS->OpenProtocol (
ControllerHandle,
&gEfiDevicePathProtocolGuid,
(VOID **)&ParentDevicePath,
This->DriverBindingHandle,
ControllerHandle,
EFI_OPEN_PROTOCOL_BY_DRIVER
);
if (EFI_ERROR (Status) && Status != EFI_ALREADY_STARTED) {
return Status;
}
Status = gBS->OpenProtocol (
ControllerHandle,
&gEfiUnixThunkProtocolGuid,
(VOID **)&UnixThunk,
This->DriverBindingHandle,
ControllerHandle,
EFI_OPEN_PROTOCOL_BY_DRIVER
);
if (EFI_ERROR (Status) && Status != EFI_ALREADY_STARTED) {
return Status;
}
if (Status != EFI_ALREADY_STARTED) {
Status = gBS->AllocatePool (
EfiBootServicesData,
sizeof (UNIX_BUS_DEVICE),
(VOID *) &UnixBusDevice
);
if (EFI_ERROR (Status)) {
return Status;
}
UnixBusDevice->Signature = UNIX_BUS_DEVICE_SIGNATURE;
UnixBusDevice->ControllerNameTable = NULL;
AddUnicodeString (
"eng",
gUnixBusDriverComponentName.SupportedLanguages,
&UnixBusDevice->ControllerNameTable,
L"Unix Bus Controller"
);
Status = gBS->InstallMultipleProtocolInterfaces (
&ControllerHandle,
&gUnixBusDriverGuid,
UnixBusDevice,
NULL
);
if (EFI_ERROR (Status)) {
FreeUnicodeStringTable (UnixBusDevice->ControllerNameTable);
gBS->FreePool (UnixBusDevice);
return Status;
}
}
//
// Loop on the Variable list. Parse each variable to produce a set of handles that
// represent virtual hardware devices.
//
InstallStatus = EFI_NOT_FOUND;
for (Index = 0; Index < UNIX_PCD_ARRAY_SIZE; Index++) {
PcdTempStr = (VOID *)LibPcdGetPtr (mPcdEnvironment[Index].Token);
ASSERT (PcdTempStr != NULL);
TempStrSize = StrLen (PcdTempStr);
TempStr = AllocateMemory ((TempStrSize * sizeof (CHAR16)) + 1);
StrCpy (TempStr, PcdTempStr);
StartString = TempStr;
//
// Parse the envirnment variable into sub strings using '!' as a delimator.
// Each substring needs it's own handle to be added to the system. This code
// does not understand the sub string. Thats the device drivers job.
//
Count = 0;
while (*StartString != '\0') {
//
// Find the end of the sub string
//
SubString = StartString;
while (*SubString != '\0' && *SubString != '!') {
SubString++;
}
if (*SubString == '!') {
//
// Replace token with '\0' to make sub strings. If this is the end
// of the string SubString will already point to NULL.
//
*SubString = '\0';
SubString++;
}
CreateDevice = TRUE;
if (RemainingDevicePath != NULL) {
CreateDevice = FALSE;
Node = (UNIX_VENDOR_DEVICE_PATH_NODE *) RemainingDevicePath;
if (Node->VendorDevicePath.Header.Type == HARDWARE_DEVICE_PATH &&
Node->VendorDevicePath.Header.SubType == HW_VENDOR_DP &&
DevicePathNodeLength (&Node->VendorDevicePath.Header) == sizeof (UNIX_VENDOR_DEVICE_PATH_NODE)
) {
if (CompareGuid (&Node->VendorDevicePath.Guid, mPcdEnvironment[Index].DevicePathGuid) &&
Node->Instance == Count
) {
CreateDevice = TRUE;
}
}
}
if (CreateDevice) {
//
// Allocate instance structure, and fill in parent information.
//
UnixDevice = AllocateMemory (sizeof (UNIX_IO_DEVICE));
if (UnixDevice == NULL) {
return EFI_OUT_OF_RESOURCES;
}
UnixDevice->Handle = NULL;
UnixDevice->ControllerHandle = ControllerHandle;
UnixDevice->ParentDevicePath = ParentDevicePath;
UnixDevice->UnixIo.UnixThunk = UnixThunk;
//
// Plus 2 to account for the NULL at the end of the Unicode string
//
StringSize = (UINTN) ((UINT8 *) SubString - (UINT8 *) StartString) + sizeof (CHAR16);
UnixDevice->UnixIo.EnvString = AllocateMemory (StringSize);
if (UnixDevice->UnixIo.EnvString != NULL) {
CopyMem (UnixDevice->UnixIo.EnvString, StartString, StringSize);
}
UnixDevice->ControllerNameTable = NULL;
// FIXME: check size
StrCpy(ComponentName, UnixDevice->UnixIo.EnvString);
UnixDevice->DevicePath = UnixBusCreateDevicePath (
ParentDevicePath,
mPcdEnvironment[Index].DevicePathGuid,
Count
);
if (UnixDevice->DevicePath == NULL) {
gBS->FreePool (UnixDevice);
return EFI_OUT_OF_RESOURCES;
}
AddUnicodeString (
"eng",
gUnixBusDriverComponentName.SupportedLanguages,
&UnixDevice->ControllerNameTable,
ComponentName
);
UnixDevice->UnixIo.TypeGuid = mPcdEnvironment[Index].DevicePathGuid;
UnixDevice->UnixIo.InstanceNumber = Count;
UnixDevice->Signature = UNIX_IO_DEVICE_SIGNATURE;
Status = gBS->InstallMultipleProtocolInterfaces (
&UnixDevice->Handle,
&gEfiDevicePathProtocolGuid,
UnixDevice->DevicePath,
&gEfiUnixIoProtocolGuid,
&UnixDevice->UnixIo,
NULL
);
if (EFI_ERROR (Status)) {
FreeUnicodeStringTable (UnixDevice->ControllerNameTable);
gBS->FreePool (UnixDevice);
} else {
//
// Open For Child Device
//
Status = gBS->OpenProtocol (
ControllerHandle,
&gEfiUnixThunkProtocolGuid,
(VOID **)&UnixThunk,
This->DriverBindingHandle,
UnixDevice->Handle,
EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER
);
if (!EFI_ERROR (Status)) {
InstallStatus = EFI_SUCCESS;
}
}
}
//
// Parse Next sub string. This will point to '\0' if we are at the end.
//
Count++;
StartString = SubString;
}
gBS->FreePool (TempStr);
}
return EFI_SUCCESS;
}
EFI_STATUS
EFIAPI
UnixBusDriverBindingStop (
IN EFI_DRIVER_BINDING_PROTOCOL *This,
IN EFI_HANDLE ControllerHandle,
IN UINTN NumberOfChildren,
IN EFI_HANDLE *ChildHandleBuffer
)
/*++
Routine Description:
Arguments:
Returns:
None
--*/
// TODO: This - add argument and description to function comment
// TODO: ControllerHandle - add argument and description to function comment
// TODO: NumberOfChildren - add argument and description to function comment
// TODO: ChildHandleBuffer - add argument and description to function comment
// TODO: EFI_SUCCESS - add return value to function comment
// TODO: EFI_DEVICE_ERROR - add return value to function comment
// TODO: EFI_SUCCESS - add return value to function comment
{
EFI_STATUS Status;
UINTN Index;
BOOLEAN AllChildrenStopped;
EFI_UNIX_IO_PROTOCOL *UnixIo;
UNIX_BUS_DEVICE *UnixBusDevice;
UNIX_IO_DEVICE *UnixDevice;
EFI_UNIX_THUNK_PROTOCOL *UnixThunk;
//
// Complete all outstanding transactions to Controller.
// Don't allow any new transaction to Controller to be started.
//
if (NumberOfChildren == 0) {
//
// Close the bus driver
//
Status = gBS->OpenProtocol (
ControllerHandle,
&gUnixBusDriverGuid,
(VOID **)&UnixBusDevice,
This->DriverBindingHandle,
ControllerHandle,
EFI_OPEN_PROTOCOL_GET_PROTOCOL
);
if (EFI_ERROR (Status)) {
return Status;
}
gBS->UninstallMultipleProtocolInterfaces (
ControllerHandle,
&gUnixBusDriverGuid,
UnixBusDevice,
NULL
);
FreeUnicodeStringTable (UnixBusDevice->ControllerNameTable);
gBS->FreePool (UnixBusDevice);
gBS->CloseProtocol (
ControllerHandle,
&gEfiUnixThunkProtocolGuid,
This->DriverBindingHandle,
ControllerHandle
);
gBS->CloseProtocol (
ControllerHandle,
&gEfiDevicePathProtocolGuid,
This->DriverBindingHandle,
ControllerHandle
);
return EFI_SUCCESS;
}
AllChildrenStopped = TRUE;
for (Index = 0; Index < NumberOfChildren; Index++) {
Status = gBS->OpenProtocol (
ChildHandleBuffer[Index],
&gEfiUnixIoProtocolGuid,
(VOID **)&UnixIo,
This->DriverBindingHandle,
ControllerHandle,
EFI_OPEN_PROTOCOL_GET_PROTOCOL
);
if (!EFI_ERROR (Status)) {
UnixDevice = UNIX_IO_DEVICE_FROM_THIS (UnixIo);
Status = gBS->CloseProtocol (
ControllerHandle,
&gEfiUnixThunkProtocolGuid,
This->DriverBindingHandle,
UnixDevice->Handle
);
Status = gBS->UninstallMultipleProtocolInterfaces (
UnixDevice->Handle,
&gEfiDevicePathProtocolGuid,
UnixDevice->DevicePath,
&gEfiUnixIoProtocolGuid,
&UnixDevice->UnixIo,
NULL
);
if (EFI_ERROR (Status)) {
gBS->OpenProtocol (
ControllerHandle,
&gEfiUnixThunkProtocolGuid,
(VOID **) &UnixThunk,
This->DriverBindingHandle,
UnixDevice->Handle,
EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER
);
} else {
//
// Close the child handle
//
FreeUnicodeStringTable (UnixDevice->ControllerNameTable);
gBS->FreePool (UnixDevice);
}
}
if (EFI_ERROR (Status)) {
AllChildrenStopped = FALSE;
}
}
if (!AllChildrenStopped) {
return EFI_DEVICE_ERROR;
}
return EFI_SUCCESS;
}
EFI_DEVICE_PATH_PROTOCOL *
UnixBusCreateDevicePath (
IN EFI_DEVICE_PATH_PROTOCOL *RootDevicePath,
IN EFI_GUID *Guid,
IN UINT16 InstanceNumber
)
/*++
Routine Description:
Create a device path node using Guid and InstanceNumber and append it to
the passed in RootDevicePath
Arguments:
RootDevicePath - Root of the device path to return.
Guid - GUID to use in vendor device path node.
InstanceNumber - Instance number to use in the vendor device path. This
argument is needed to make sure each device path is unique.
Returns:
EFI_DEVICE_PATH_PROTOCOL
--*/
{
UNIX_VENDOR_DEVICE_PATH_NODE DevicePath;
DevicePath.VendorDevicePath.Header.Type = HARDWARE_DEVICE_PATH;
DevicePath.VendorDevicePath.Header.SubType = HW_VENDOR_DP;
SetDevicePathNodeLength (&DevicePath.VendorDevicePath.Header, sizeof (UNIX_VENDOR_DEVICE_PATH_NODE));
//
// The GUID defines the Class
//
CopyMem (&DevicePath.VendorDevicePath.Guid, Guid, sizeof (EFI_GUID));
//
// Add an instance number so we can make sure there are no Device Path
// duplication.
//
DevicePath.Instance = InstanceNumber;
return AppendDevicePathNode (
RootDevicePath,
(EFI_DEVICE_PATH_PROTOCOL *) &DevicePath
);
}
|