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
|
/**@file
Discovers all the ISA Controllers and their resources by using the ISA PnP
Protocol, produces an instance of the ISA I/O Protocol for every ISA
Controller found, loads and initializes all ISA Device Drivers, matches ISA
Device Drivers with their respective ISA Controllers in a deterministic
manner, and informs a ISA Device Driver when it is to start managing an ISA
Controller.
Copyright (c) 2006 - 2007, Intel Corporation.<BR>
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.
**/
#include "InternalIsaBus.h"
//
// ISA Bus Driver Global Variables
//
EFI_DRIVER_BINDING_PROTOCOL gIsaBusControllerDriver = {
IsaBusControllerDriverSupported,
IsaBusControllerDriverStart,
IsaBusControllerDriverStop,
0xa,
NULL,
NULL
};
/**
The user Entry Point for module IsaBus. The user code starts with this function.
@param[in] ImageHandle The firmware allocated handle for the EFI image.
@param[in] SystemTable A pointer to the EFI System Table.
@retval EFI_SUCCESS The entry point is executed successfully.
@retval other Some error occurs when executing this entry point.
**/
EFI_STATUS
EFIAPI
InitializeIsaBus(
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
//
// Install driver model protocol(s).
//
Status = EfiLibInstallDriverBindingComponentName2 (
ImageHandle,
SystemTable,
&gIsaBusControllerDriver,
ImageHandle,
&gIsaBusComponentName,
&gIsaBusComponentName2
);
ASSERT_EFI_ERROR (Status);
return Status;
}
EFI_STATUS
EFIAPI
IsaBusControllerDriverSupported (
IN EFI_DRIVER_BINDING_PROTOCOL * This,
IN EFI_HANDLE Controller,
IN EFI_DEVICE_PATH_PROTOCOL * RemainingDevicePath OPTIONAL
)
/**
Routine Description:
This function checks to see if a controller can be managed by the ISA Bus
Driver. This is done by checking to see if the controller supports the
EFI_PCI_IO_PROTOCOL protocol, and then looking at the PCI Configuration
Header to see if the device is a PCI to ISA bridge. The class code of
PCI to ISA bridge: Base class 06h, Sub class 01h Interface 00h
Arguments:
This - The EFI_DRIVER_BINDING_PROTOCOL instance.
Controller - The handle of the device to check.
RemainingDevicePath - A pointer to the remaining portion of a device path.
Returns:
EFI_SUCCESS - The device is supported by this driver.
EFI_UNSUPPORTED - The device is not supported by this driver.
**/
{
EFI_STATUS Status;
EFI_ISA_ACPI_PROTOCOL *IsaAcpi;
//
// If RemainingDevicePath is not NULL, it should verify that the first device
// path node in RemainingDevicePath is an ACPI Device path node
//
if (RemainingDevicePath != NULL) {
if (RemainingDevicePath->Type != ACPI_DEVICE_PATH) {
return EFI_UNSUPPORTED;
} else if (RemainingDevicePath->SubType == ACPI_DP) {
if (DevicePathNodeLength (RemainingDevicePath) != sizeof (ACPI_HID_DEVICE_PATH)) {
return EFI_UNSUPPORTED;
}
} else if (RemainingDevicePath->SubType == ACPI_EXTENDED_DP) {
if (DevicePathNodeLength (RemainingDevicePath) != sizeof (ACPI_EXTENDED_HID_DEVICE_PATH)) {
return EFI_UNSUPPORTED;
}
} else {
return EFI_UNSUPPORTED;
}
}
//
// Test the existence of DEVICE_PATH protocol
//
Status = gBS->OpenProtocol (
Controller,
&gEfiDevicePathProtocolGuid,
NULL,
This->DriverBindingHandle,
Controller,
EFI_OPEN_PROTOCOL_TEST_PROTOCOL
);
if (EFI_ERROR (Status)) {
return Status;
}
//
// Get the Isa Acpi protocol
//
Status = gBS->OpenProtocol (
Controller,
&gEfiIsaAcpiProtocolGuid,
(VOID **) &IsaAcpi,
This->DriverBindingHandle,
Controller,
EFI_OPEN_PROTOCOL_BY_DRIVER
);
if (Status == EFI_ALREADY_STARTED) {
return EFI_SUCCESS;
}
if (EFI_ERROR (Status)) {
return Status;
}
gBS->CloseProtocol (
Controller,
&gEfiIsaAcpiProtocolGuid,
This->DriverBindingHandle,
Controller
);
return Status;
}
EFI_STATUS
EFIAPI
IsaBusControllerDriverStart (
IN EFI_DRIVER_BINDING_PROTOCOL * This,
IN EFI_HANDLE Controller,
IN EFI_DEVICE_PATH_PROTOCOL * RemainingDevicePath OPTIONAL
)
/**
Routine Description:
This function tells the ISA Bus Driver to start managing a PCI to ISA
Bridge controller.
Arguments:
This - The EFI_DRIVER_BINDING_PROTOCOL instance.
Controller - A handle to the device being started.
RemainingDevicePath - A pointer to the remaining portion of a device path.
Returns:
EFI_SUCCESS - The device was started.
EFI_UNSUPPORTED - The device is not supported.
EFI_DEVICE_ERROR - The device could not be started due to a device error.
EFI_ALREADY_STARTED - The device has already been started.
EFI_INVALID_PARAMETER - One of the parameters has an invalid value.
EFI_OUT_OF_RESOURCES - The request could not be completed due to a lack of
resources.
**/
{
EFI_STATUS Status;
EFI_PCI_IO_PROTOCOL *PciIo;
EFI_DEVICE_PATH_PROTOCOL *ParentDevicePath;
EFI_ISA_ACPI_PROTOCOL *IsaAcpi;
EFI_ISA_ACPI_DEVICE_ID *IsaDevice;
EFI_ISA_ACPI_RESOURCE_LIST *ResourceList;
EFI_GENERIC_MEMORY_TEST_PROTOCOL *GenMemoryTest;
//
// Local variables declaration for StatusCode reporting
//
EFI_DEVICE_PATH_PROTOCOL *DevicePathData;
//
// Open Device Path Protocol
//
Status = gBS->OpenProtocol (
Controller,
&gEfiDevicePathProtocolGuid,
(VOID **) &ParentDevicePath,
This->DriverBindingHandle,
Controller,
EFI_OPEN_PROTOCOL_BY_DRIVER
);
if (EFI_ERROR (Status) && Status != EFI_ALREADY_STARTED) {
return Status;
}
//
// Open Pci IO Protocol
//
Status = gBS->OpenProtocol (
Controller,
&gEfiPciIoProtocolGuid,
(VOID **) &PciIo,
This->DriverBindingHandle,
Controller,
EFI_OPEN_PROTOCOL_GET_PROTOCOL
);
if (EFI_ERROR (Status)) {
//
// Close opened protocol
//
gBS->CloseProtocol (
Controller,
&gEfiDevicePathProtocolGuid,
This->DriverBindingHandle,
Controller
);
return Status;
}
//
// Open ISA Acpi Protocol
//
Status = gBS->OpenProtocol (
Controller,
&gEfiIsaAcpiProtocolGuid,
(VOID **) &IsaAcpi,
This->DriverBindingHandle,
Controller,
EFI_OPEN_PROTOCOL_BY_DRIVER
);
if (EFI_ERROR (Status) && Status != EFI_ALREADY_STARTED) {
//
// Close opened protocol
//
gBS->CloseProtocol (
Controller,
&gEfiDevicePathProtocolGuid,
This->DriverBindingHandle,
Controller
);
gBS->CloseProtocol (
Controller,
&gEfiPciIoProtocolGuid,
This->DriverBindingHandle,
Controller
);
return Status;
}
//
// The IsaBus driver will use memory below 16M, which is not tested yet,
// so call CompatibleRangeTest to test them. Since memory below 1M should
// be reserved to CSM, and 15M~16M might be reserved for Isa hole, test 1M
// ~15M here
//
Status = gBS->LocateProtocol (
&gEfiGenericMemTestProtocolGuid,
NULL,
(VOID **) &GenMemoryTest
);
if (!EFI_ERROR (Status)) {
Status = GenMemoryTest->CompatibleRangeTest (
GenMemoryTest,
0x100000,
0xE00000
);
}
//
// Report Status Code here since we will initialize the host controller
//
REPORT_STATUS_CODE_WITH_DEVICE_PATH (
EFI_PROGRESS_CODE,
(EFI_IO_BUS_LPC | EFI_IOB_PC_INIT),
ParentDevicePath
);
//
// first init ISA interface
//
IsaAcpi->InterfaceInit (IsaAcpi);
//
// Report Status Code here since we will enable the host controller
//
REPORT_STATUS_CODE_WITH_DEVICE_PATH (
EFI_PROGRESS_CODE,
(EFI_IO_BUS_LPC | EFI_IOB_PC_ENABLE),
ParentDevicePath
);
//
// Create each ISA device handle in this ISA bus
//
IsaDevice = NULL;
do {
Status = IsaAcpi->DeviceEnumerate (IsaAcpi, &IsaDevice);
if (EFI_ERROR (Status)) {
break;
}
//
// Get current resource of this ISA device
//
ResourceList = NULL;
Status = IsaAcpi->GetCurResource (IsaAcpi, IsaDevice, &ResourceList);
if (EFI_ERROR (Status)) {
continue;
}
//
// Create handle for this ISA device
//
Status = IsaCreateDevice (
This,
Controller,
PciIo,
ParentDevicePath,
ResourceList,
&DevicePathData
);
if (EFI_ERROR (Status)) {
continue;
}
//
// Initialize ISA device
//
IsaAcpi->InitDevice (IsaAcpi, IsaDevice);
//
// Set resources for this ISA device
//
Status = IsaAcpi->SetResource (IsaAcpi, IsaDevice, ResourceList);
//
// Report Status Code here when failed to resource conflicts
//
if (EFI_ERROR (Status) && (Status != EFI_UNSUPPORTED)) {
//
// It's hard to tell which resource conflicts
//
REPORT_STATUS_CODE_WITH_DEVICE_PATH (
EFI_ERROR_CODE,
(EFI_IO_BUS_LPC | EFI_IOB_EC_RESOURCE_CONFLICT),
DevicePathData
);
}
//
// Set power for this ISA device
//
IsaAcpi->SetPower (IsaAcpi, IsaDevice, TRUE);
//
// Enable this ISA device
//
IsaAcpi->EnableDevice (IsaAcpi, IsaDevice, TRUE);
} while (TRUE);
return EFI_SUCCESS;
}
EFI_STATUS
EFIAPI
IsaBusControllerDriverStop (
IN EFI_DRIVER_BINDING_PROTOCOL * This,
IN EFI_HANDLE Controller,
IN UINTN NumberOfChildren,
IN EFI_HANDLE * ChildHandleBuffer OPTIONAL
)
/**
Routine Description:
This function tells the ISA Bus Driver to stop managing a PCI to ISA
Bridge controller.
Arguments:
This - The EFI_DRIVER_BINDING_PROTOCOL instance.
Controller - A handle to the device being stopped.
NumberOfChindren - The number of child device handles in ChildHandleBuffer.
ChildHandleBuffer - An array of child handles to be freed.
Returns:
EFI_SUCCESS - The device was stopped.
EFI_DEVICE_ERROR - The device could not be stopped due to a device error.
EFI_NOT_STARTED - The device has not been started.
EFI_INVALID_PARAMETER - One of the parameters has an invalid value.
EFI_OUT_OF_RESOURCES - The request could not be completed due to a lack of
resources.
**/
{
EFI_STATUS Status;
UINTN Index;
BOOLEAN AllChildrenStopped;
ISA_IO_DEVICE *IsaIoDevice;
EFI_ISA_IO_PROTOCOL *IsaIo;
if (NumberOfChildren == 0) {
//
// Close the bus driver
//
Status = gBS->CloseProtocol (
Controller,
&gEfiPciIoProtocolGuid,
This->DriverBindingHandle,
Controller
);
if (EFI_ERROR (Status)) {
return Status;
}
Status = gBS->CloseProtocol (
Controller,
&gEfiDevicePathProtocolGuid,
This->DriverBindingHandle,
Controller
);
if (EFI_ERROR (Status)) {
return Status;
}
Status = gBS->CloseProtocol (
Controller,
&gEfiIsaAcpiProtocolGuid,
This->DriverBindingHandle,
Controller
);
if (EFI_ERROR (Status)) {
return Status;
}
return EFI_SUCCESS;
}
//
// Complete all outstanding transactions to Controller.
// Don't allow any new transaction to Controller to be started.
//
//
// Stop all the children
// Find all the ISA devices that were discovered on this PCI to ISA Bridge
// with the Start() function.
//
AllChildrenStopped = TRUE;
for (Index = 0; Index < NumberOfChildren; Index++) {
Status = gBS->OpenProtocol (
ChildHandleBuffer[Index],
&gEfiIsaIoProtocolGuid,
(VOID **) &IsaIo,
This->DriverBindingHandle,
Controller,
EFI_OPEN_PROTOCOL_GET_PROTOCOL
);
if (!EFI_ERROR (Status)) {
IsaIoDevice = ISA_IO_DEVICE_FROM_ISA_IO_THIS (IsaIo);
Status = gBS->UninstallMultipleProtocolInterfaces (
ChildHandleBuffer[Index],
&gEfiDevicePathProtocolGuid,
IsaIoDevice->DevicePath,
&gEfiIsaIoProtocolGuid,
&IsaIoDevice->IsaIo,
NULL
);
if (!EFI_ERROR (Status)) {
//
// Close the child handle
//
Status = gBS->CloseProtocol (
Controller,
&gEfiPciIoProtocolGuid,
This->DriverBindingHandle,
ChildHandleBuffer[Index]
);
gBS->FreePool (IsaIoDevice->DevicePath);
gBS->FreePool (IsaIoDevice);
}
}
if (EFI_ERROR (Status)) {
AllChildrenStopped = FALSE;
}
}
if (!AllChildrenStopped) {
return EFI_DEVICE_ERROR;
}
return EFI_SUCCESS;
}
//
// Internal Function
//
EFI_STATUS
IsaCreateDevice (
IN EFI_DRIVER_BINDING_PROTOCOL *This,
IN EFI_HANDLE Controller,
IN EFI_PCI_IO_PROTOCOL *PciIo,
IN EFI_DEVICE_PATH_PROTOCOL *ParentDevicePath,
IN EFI_ISA_ACPI_RESOURCE_LIST *IsaDeviceResourceList,
OUT EFI_DEVICE_PATH_PROTOCOL **ChildDevicePath
)
/**
Routine Description:
Create ISA device found by IsaPnpProtocol
Arguments:
This - The EFI_DRIVER_BINDING_PROTOCOL instance.
Controller - The handle of ISA bus controller(PCI to ISA bridge)
PciIo - The Pointer to the PCI protocol
ParentDevicePath - Device path of the ISA bus controller
IsaDeviceResourceList - The resource list of the ISA device
ChildDevicePath - The pointer to the child device.
Returns:
EFI_SUCCESS - Create the child device.
EFI_OUT_OF_RESOURCES - The request could not be completed due to a lack of
resources.
EFI_DEVICE_ERROR - Can not create child device.
**/
{
EFI_STATUS Status;
ISA_IO_DEVICE *IsaIoDevice;
EFI_DEV_PATH Node;
//
// Initialize the PCI_IO_DEVICE structure
//
IsaIoDevice = AllocateZeroPool (sizeof (ISA_IO_DEVICE));
if (IsaIoDevice == NULL) {
return EFI_OUT_OF_RESOURCES;
}
IsaIoDevice->Signature = ISA_IO_DEVICE_SIGNATURE;
IsaIoDevice->Handle = NULL;
IsaIoDevice->PciIo = PciIo;
//
// Initialize the ISA I/O instance structure
//
Status = InitializeIsaIoInstance (IsaIoDevice, IsaDeviceResourceList);
if (EFI_ERROR (Status)) {
gBS->FreePool (IsaIoDevice);
return Status;
}
//
// Build the child device path
//
Node.DevPath.Type = ACPI_DEVICE_PATH;
Node.DevPath.SubType = ACPI_DP;
SetDevicePathNodeLength (&Node.DevPath, sizeof (ACPI_HID_DEVICE_PATH));
Node.Acpi.HID = IsaDeviceResourceList->Device.HID;
Node.Acpi.UID = IsaDeviceResourceList->Device.UID;
IsaIoDevice->DevicePath = AppendDevicePathNode (
ParentDevicePath,
&Node.DevPath
);
if (IsaIoDevice->DevicePath == NULL) {
Status = EFI_DEVICE_ERROR;
goto Done;
}
*ChildDevicePath = IsaIoDevice->DevicePath;
//
// Create a child handle and attach the DevicePath,
// PCI I/O, and Controller State
//
Status = gBS->InstallMultipleProtocolInterfaces (
&IsaIoDevice->Handle,
&gEfiDevicePathProtocolGuid,
IsaIoDevice->DevicePath,
&gEfiIsaIoProtocolGuid,
&IsaIoDevice->IsaIo,
NULL
);
if (EFI_ERROR (Status)) {
goto Done;
}
Status = gBS->OpenProtocol (
Controller,
&gEfiPciIoProtocolGuid,
(VOID **) &PciIo,
This->DriverBindingHandle,
IsaIoDevice->Handle,
EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER
);
if (EFI_ERROR (Status)) {
gBS->UninstallMultipleProtocolInterfaces (
IsaIoDevice->Handle,
&gEfiDevicePathProtocolGuid,
IsaIoDevice->DevicePath,
&gEfiIsaIoProtocolGuid,
&IsaIoDevice->IsaIo,
NULL
);
}
Done:
if (EFI_ERROR (Status)) {
if (IsaIoDevice->DevicePath != NULL) {
gBS->FreePool (IsaIoDevice->DevicePath);
}
gBS->FreePool (IsaIoDevice);
}
return Status;
}
|