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
|
/** @file
Sample ACPI Platform Driver
Copyright (c) 2008 - 2018, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <PiDxe.h>
#include <Protocol/AcpiTable.h>
#include <Protocol/FirmwareVolume2.h>
#include <Library/BaseLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/DebugLib.h>
#include <Library/PcdLib.h>
#include <IndustryStandard/Acpi.h>
/**
Locate the first instance of a protocol. If the protocol requested is an
FV protocol, then it will return the first FV that contains the ACPI table
storage file.
@param Instance Return pointer to the first instance of the protocol
@return EFI_SUCCESS The function completed successfully.
@return EFI_NOT_FOUND The protocol could not be located.
@return EFI_OUT_OF_RESOURCES There are not enough resources to find the protocol.
**/
EFI_STATUS
LocateFvInstanceWithTables (
OUT EFI_FIRMWARE_VOLUME2_PROTOCOL **Instance
)
{
EFI_STATUS Status;
EFI_HANDLE *HandleBuffer;
UINTN NumberOfHandles;
EFI_FV_FILETYPE FileType;
UINT32 FvStatus;
EFI_FV_FILE_ATTRIBUTES Attributes;
UINTN Size;
UINTN Index;
EFI_FIRMWARE_VOLUME2_PROTOCOL *FvInstance;
FvStatus = 0;
//
// Locate protocol.
//
Status = gBS->LocateHandleBuffer (
ByProtocol,
&gEfiFirmwareVolume2ProtocolGuid,
NULL,
&NumberOfHandles,
&HandleBuffer
);
if (EFI_ERROR (Status)) {
//
// Defined errors at this time are not found and out of resources.
//
return Status;
}
//
// Looking for FV with ACPI storage file
//
for (Index = 0; Index < NumberOfHandles; Index++) {
//
// Get the protocol on this handle
// This should not fail because of LocateHandleBuffer
//
Status = gBS->HandleProtocol (
HandleBuffer[Index],
&gEfiFirmwareVolume2ProtocolGuid,
(VOID**) &FvInstance
);
ASSERT_EFI_ERROR (Status);
//
// See if it has the ACPI storage file
//
Status = FvInstance->ReadFile (
FvInstance,
(EFI_GUID*)PcdGetPtr (PcdAcpiTableStorageFile),
NULL,
&Size,
&FileType,
&Attributes,
&FvStatus
);
//
// If we found it, then we are done
//
if (Status == EFI_SUCCESS) {
*Instance = FvInstance;
break;
}
}
//
// Our exit status is determined by the success of the previous operations
// If the protocol was found, Instance already points to it.
//
//
// Free any allocated buffers
//
gBS->FreePool (HandleBuffer);
return Status;
}
/**
This function calculates and updates an UINT8 checksum.
@param Buffer Pointer to buffer to checksum
@param Size Number of bytes to checksum
**/
VOID
AcpiPlatformChecksum (
IN UINT8 *Buffer,
IN UINTN Size
)
{
UINTN ChecksumOffset;
ChecksumOffset = OFFSET_OF (EFI_ACPI_DESCRIPTION_HEADER, Checksum);
//
// Set checksum to 0 first
//
Buffer[ChecksumOffset] = 0;
//
// Update checksum value
//
Buffer[ChecksumOffset] = CalculateCheckSum8(Buffer, Size);
}
#ifdef VBOX
/* Disables the old code only copying a selection of tables, missing out a bunch of things available in the XSDT/RSDT. */
# define ACPI_NO_STATIC_TABLES_SELECTION 1
# define ACPI_RSD_PTR SIGNATURE_64('R', 'S', 'D', ' ', 'P', 'T', 'R', ' ')
# define EBDA_BASE (0x9FC0 << 4)
VOID *
FindAcpiRsdPtr(VOID)
{
UINTN Address;
UINTN Index;
//
// First Search 0x0e0000 - 0x0fffff for RSD Ptr
//
for (Address = 0xe0000; Address < 0xfffff; Address += 0x10) {
if (*(UINT64 *)(Address) == ACPI_RSD_PTR) {
return (VOID *)Address;
}
}
//
// Search EBDA
//
Address = EBDA_BASE;
for (Index = 0; Index < 0x400 ; Index += 16) {
if (*(UINT64 *)(Address + Index) == ACPI_RSD_PTR) {
return (VOID *)Address;
}
}
return NULL;
}
#ifndef ACPI_NO_STATIC_TABLES_SELECTION
VOID *FindSignature(VOID* Start, UINT32 Signature, BOOLEAN NoChecksum)
{
UINT8 *Ptr = (UINT8*)Start;
UINT32 Count = 0x10000; // 16 pages
while (Count-- > 0) {
if ( *(UINT32*)Ptr == Signature
&& ((EFI_ACPI_DESCRIPTION_HEADER *)Ptr)->Length <= Count
&& (NoChecksum ||
CalculateCheckSum8(Ptr, ((EFI_ACPI_DESCRIPTION_HEADER *)Ptr)->Length) == 0
)) {
return Ptr;
}
Ptr++;
}
return NULL;
}
#endif
VOID
FillSysTablesInfo(VOID **Tables, UINT32 TablesSize)
{
UINT32 Table = 0;
EFI_ACPI_2_0_ROOT_SYSTEM_DESCRIPTION_POINTER *RsdPtr;
#ifndef ACPI_NO_STATIC_TABLES_SELECTION
VOID *TablesPage;
#else
EFI_ACPI_DESCRIPTION_HEADER *RsdtTbl;
#endif
UINT64 *PtrTbl;
UINT32 Index;
RsdPtr = (EFI_ACPI_2_0_ROOT_SYSTEM_DESCRIPTION_POINTER*)FindAcpiRsdPtr();
ASSERT(RsdPtr != NULL);
#ifndef ACPI_NO_STATIC_TABLES_SELECTION
#define FLAG_OPTIONAL 1<<0
#define FLAG_NO_CHECKSUM 1<<1
static struct {
UINT32 Signature;
UINT32 Flags;
CHAR8* Name;
} TableInfo[] = {
// MADT, optional
{ SIGNATURE_32('A', 'P', 'I', 'C'), FLAG_OPTIONAL, "MADT"},
// FACP (also called FADT)
{ SIGNATURE_32('F', 'A', 'C', 'P'), 0, "FADT"},
// FACS, according 5.2.9 of ACPI v2. spec FACS doesn't have checksum field
{ SIGNATURE_32('F', 'A', 'C', 'S'), FLAG_NO_CHECKSUM, "FACS"},
// DSDT
{ SIGNATURE_32('D', 'S', 'D', 'T'), 0, "DSDT"},
// SSDT
{ SIGNATURE_32('S', 'S', 'D', 'T'), FLAG_OPTIONAL, "SSDT"},
// HPET
{ SIGNATURE_32('H', 'P', 'E', 'T'), FLAG_OPTIONAL, "HPET"},
// MCFG
{ SIGNATURE_32('M', 'C', 'F', 'G'), FLAG_OPTIONAL, "MCFG"}
};
TablesPage = (VOID *)(UINTN)((RsdPtr->RsdtAddress) & ~0xfff);
DEBUG((DEBUG_INFO, "TablesPage:%p\n", TablesPage));
for (Index = 0; Index < sizeof TableInfo / sizeof TableInfo[0]; Index++)
{
VOID *Ptr = FindSignature(TablesPage, TableInfo[Index].Signature,
(BOOLEAN)((TableInfo[Index].Flags & FLAG_NO_CHECKSUM) != 0));
if (TableInfo[Index].Signature == SIGNATURE_32('F', 'A', 'C', 'P'))
{
// we actually have 2 FADTs, see https://xtracker.innotek.de/index.php?bug=4082
Ptr = FindSignature((UINT8*)Ptr+32, SIGNATURE_32('F', 'A', 'C', 'P'), FALSE);
}
if (!(TableInfo[Index].Flags & FLAG_OPTIONAL))
{
if (!Ptr)
DEBUG((EFI_D_ERROR, "%a: isn't optional %p\n", TableInfo[Index].Name, Ptr));
ASSERT(Ptr != NULL);
}
DEBUG((EFI_D_ERROR, "%a: %p\n", TableInfo[Index].Name, Ptr));
if (Ptr)
Tables[Table++] = Ptr;
}
#else
RsdtTbl = (EFI_ACPI_DESCRIPTION_HEADER*)(UINTN)RsdPtr->XsdtAddress;
DEBUG((DEBUG_INFO, "RsdtTbl:%p\n", RsdtTbl));
PtrTbl = (UINT64 *)(RsdtTbl + 1);
for (Index = 0; Index < (RsdtTbl->Length - sizeof(*RsdtTbl)) / sizeof(UINT64); Index++)
{
EFI_ACPI_DESCRIPTION_HEADER *Header = (EFI_ACPI_DESCRIPTION_HEADER *)(UINTN)*PtrTbl++;
DEBUG ((DEBUG_VERBOSE, "Table %p found \"%-4.4a\" size 0x%x\n", Header, (CONST CHAR8 *)&Header->Signature, Header->Length));
if (Header->Signature == SIGNATURE_32('F', 'A', 'C', 'P'))
{
/* Add the DSDT pointer from there. */
EFI_ACPI_2_0_FIXED_ACPI_DESCRIPTION_TABLE *Fadt = (EFI_ACPI_2_0_FIXED_ACPI_DESCRIPTION_TABLE *)Header;
DEBUG((DEBUG_INFO, "Found FACP: DSDT 0x%x FACS 0x%x XDsdt %p XFacs %p\n", Fadt->Dsdt, Fadt->FirmwareCtrl, Fadt->XDsdt, Fadt->XFirmwareCtrl));
Tables[Table++] = (VOID *)(UINTN)Fadt->FirmwareCtrl;
Tables[Table++] = (VOID *)(UINTN)Fadt->Dsdt;
}
Tables[Table++] = Header;
}
#endif
#if 0
// RSDT
ASSERT(Table < TablesSize);
Tables[Table] = FindSignature(TablesPage, SIGNATURE_32('R', 'S', 'D', 'T'));
DEBUG ((EFI_D_ERROR, "RSDT: %p\n", Tables[Table]));
ASSERT(Tables[Table] != NULL);
Table++;
// XSDT
ASSERT(Table < TablesSize);
Tables[Table] = FindSignature(TablesPage, SIGNATURE_32('X', 'S', 'D', 'T'));
DEBUG ((EFI_D_ERROR, "XSDT: %p\n", Tables[Table]));
ASSERT(Tables[Table] != NULL);
Table++;
#endif
DEBUG((DEBUG_INFO, "We found %d tables (max allowed %d)\n", Table, TablesSize));
Tables[Table] = NULL;
}
#endif /* VBOX */
/**
Entrypoint of Acpi Platform driver.
@param ImageHandle
@param SystemTable
@return EFI_SUCCESS
@return EFI_LOAD_ERROR
@return EFI_OUT_OF_RESOURCES
**/
EFI_STATUS
EFIAPI
AcpiPlatformEntryPoint (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
EFI_ACPI_TABLE_PROTOCOL *AcpiTable;
#ifdef VBOX
# ifndef ACPI_NO_STATIC_TABLES_SELECTION
VOID *VBoxTables[10];
# else
VOID *VBoxTables[128];
# endif
#else
EFI_FIRMWARE_VOLUME2_PROTOCOL *FwVol;
#endif
INTN Instance;
EFI_ACPI_COMMON_HEADER *CurrentTable;
UINTN TableHandle;
#ifndef VBOX
UINT32 FvStatus;
#endif
UINTN TableSize;
UINTN Size;
Instance = 0;
CurrentTable = NULL;
TableHandle = 0;
//
// Find the AcpiTable protocol
//
Status = gBS->LocateProtocol (&gEfiAcpiTableProtocolGuid, NULL, (VOID**)&AcpiTable);
if (EFI_ERROR (Status)) {
return EFI_ABORTED;
}
#ifdef VBOX
//
// VBOX already has tables prepared in memory - just reuse them.
//
FillSysTablesInfo(VBoxTables, sizeof(VBoxTables)/sizeof(VBoxTables[0]));
#else
//
//
// Locate the firmware volume protocol
//
Status = LocateFvInstanceWithTables (&FwVol);
if (EFI_ERROR (Status)) {
return EFI_ABORTED;
}
#endif
//
// Read tables from the storage file.
//
while (Status == EFI_SUCCESS) {
#ifdef VBOX
CurrentTable = (EFI_ACPI_COMMON_HEADER *)VBoxTables[Instance];
Status = (CurrentTable == NULL) ? EFI_NOT_FOUND : EFI_SUCCESS;
if (CurrentTable) {
Size = CurrentTable->Length;
DEBUG((EFI_D_ERROR, "adding %p %d\n", CurrentTable, Size));
} else
Size = 0; // Just to shut up the compiler.
#else
Status = FwVol->ReadSection (
FwVol,
(EFI_GUID*)PcdGetPtr (PcdAcpiTableStorageFile),
EFI_SECTION_RAW,
Instance,
(VOID**) &CurrentTable,
&Size,
&FvStatus
);
#endif
if (!EFI_ERROR(Status)) {
//
// Add the table
//
TableHandle = 0;
TableSize = ((EFI_ACPI_DESCRIPTION_HEADER *) CurrentTable)->Length;
#ifdef VBOX
DEBUG((DEBUG_INFO, "Size:%d, TableSize:%d\n", Size, TableSize));
#endif
ASSERT (Size >= TableSize);
//
// Checksum ACPI table
//
AcpiPlatformChecksum ((UINT8*)CurrentTable, TableSize);
//
// Install ACPI table
//
Status = AcpiTable->InstallAcpiTable (
AcpiTable,
CurrentTable,
TableSize,
&TableHandle
);
#ifndef VBOX /* In case we're reading ACPI tables from memory we haven't
allocated this memory, so it isn't required to free it */
//
// Free memory allocated by ReadSection
//
gBS->FreePool (CurrentTable);
if (EFI_ERROR(Status)) {
return EFI_ABORTED;
}
#endif
//
// Increment the instance
//
Instance++;
CurrentTable = NULL;
}
}
//
// The driver does not require to be kept loaded.
//
return EFI_REQUEST_UNLOAD_IMAGE;
}
|