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Acpi10.h
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1 /** @file
2  ACPI 1.0b definitions from the ACPI Specification, revision 1.0b
3 
4 Copyright (c) 2006 - 2011, Intel Corporation. All rights reserved.<BR>
5 This program and the accompanying materials are licensed and made available under
6 the terms and conditions of the BSD License that accompanies this distribution.
7 The full text of the license may be found at
8 http://opensource.org/licenses/bsd-license.php.
9 
10 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
11 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
12 **/
13 
14 #ifndef _ACPI_1_0_H_
15 #define _ACPI_1_0_H_
16 
17 FILE_LICENCE ( BSD3 );
18 
20 
21 ///
22 /// Common table header, this prefaces all ACPI tables, including FACS, but
23 /// excluding the RSD PTR structure.
24 ///
25 typedef struct {
29 
30 #pragma pack(1)
31 ///
32 /// The common ACPI description table header. This structure prefaces most ACPI tables.
33 ///
34 typedef struct {
39  UINT8 OemId[6];
45 #pragma pack()
46 
47 //
48 // Define for Desriptor
49 //
50 #define ACPI_SMALL_ITEM_FLAG 0x00
51 #define ACPI_LARGE_ITEM_FLAG 0x01
52 
53 //
54 // Small Item Descriptor Name
55 //
56 #define ACPI_SMALL_IRQ_DESCRIPTOR_NAME 0x04
57 #define ACPI_SMALL_DMA_DESCRIPTOR_NAME 0x05
58 #define ACPI_SMALL_START_DEPENDENT_DESCRIPTOR_NAME 0x06
59 #define ACPI_SMALL_END_DEPENDENT_DESCRIPTOR_NAME 0x07
60 #define ACPI_SMALL_IO_PORT_DESCRIPTOR_NAME 0x08
61 #define ACPI_SMALL_FIXED_IO_PORT_DESCRIPTOR_NAME 0x09
62 #define ACPI_SMALL_VENDOR_DEFINED_DESCRIPTOR_NAME 0x0E
63 #define ACPI_SMALL_END_TAG_DESCRIPTOR_NAME 0x0F
64 
65 //
66 // Large Item Descriptor Name
67 //
68 #define ACPI_LARGE_24_BIT_MEMORY_RANGE_DESCRIPTOR_NAME 0x01
69 #define ACPI_LARGE_VENDOR_DEFINED_DESCRIPTOR_NAME 0x04
70 #define ACPI_LARGE_32_BIT_MEMORY_RANGE_DESCRIPTOR_NAME 0x05
71 #define ACPI_LARGE_32_BIT_FIXED_MEMORY_RANGE_DESCRIPTOR_NAME 0x06
72 #define ACPI_LARGE_DWORD_ADDRESS_SPACE_DESCRIPTOR_NAME 0x07
73 #define ACPI_LARGE_WORD_ADDRESS_SPACE_DESCRIPTOR_NAME 0x08
74 #define ACPI_LARGE_EXTENDED_IRQ_DESCRIPTOR_NAME 0x09
75 #define ACPI_LARGE_QWORD_ADDRESS_SPACE_DESCRIPTOR_NAME 0x0A
76 
77 //
78 // Small Item Descriptor Value
79 //
80 #define ACPI_IRQ_NOFLAG_DESCRIPTOR 0x22
81 #define ACPI_IRQ_DESCRIPTOR 0x23
82 #define ACPI_DMA_DESCRIPTOR 0x2A
83 #define ACPI_START_DEPENDENT_DESCRIPTOR 0x30
84 #define ACPI_START_DEPENDENT_EX_DESCRIPTOR 0x31
85 #define ACPI_END_DEPENDENT_DESCRIPTOR 0x38
86 #define ACPI_IO_PORT_DESCRIPTOR 0x47
87 #define ACPI_FIXED_LOCATION_IO_PORT_DESCRIPTOR 0x4B
88 #define ACPI_END_TAG_DESCRIPTOR 0x79
89 
90 //
91 // Large Item Descriptor Value
92 //
93 #define ACPI_24_BIT_MEMORY_RANGE_DESCRIPTOR 0x81
94 #define ACPI_32_BIT_MEMORY_RANGE_DESCRIPTOR 0x85
95 #define ACPI_32_BIT_FIXED_MEMORY_RANGE_DESCRIPTOR 0x86
96 #define ACPI_DWORD_ADDRESS_SPACE_DESCRIPTOR 0x87
97 #define ACPI_WORD_ADDRESS_SPACE_DESCRIPTOR 0x88
98 #define ACPI_EXTENDED_INTERRUPT_DESCRIPTOR 0x89
99 #define ACPI_QWORD_ADDRESS_SPACE_DESCRIPTOR 0x8A
100 #define ACPI_ADDRESS_SPACE_DESCRIPTOR 0x8A
101 
102 //
103 // Resource Type
104 //
105 #define ACPI_ADDRESS_SPACE_TYPE_MEM 0x00
106 #define ACPI_ADDRESS_SPACE_TYPE_IO 0x01
107 #define ACPI_ADDRESS_SPACE_TYPE_BUS 0x02
108 
109 ///
110 /// Power Management Timer frequency is fixed at 3.579545MHz.
111 ///
112 #define ACPI_TIMER_FREQUENCY 3579545
113 
114 //
115 // Ensure proper structure formats
116 //
117 #pragma pack(1)
118 
119 ///
120 /// The commond definition of QWORD, DWORD, and WORD
121 /// Address Space Descriptors.
122 ///
123 typedef PACKED struct {
135 
136 typedef PACKED union {
138  PACKED struct {
140  UINT8 Name : 4;
141  UINT8 Type : 1;
142  } Bits;
144 
145 typedef PACKED struct {
146  PACKED union {
147  UINT8 Byte;
148  PACKED struct {
149  UINT8 Name : 7;
150  UINT8 Type : 1;
151  }Bits;
152  } Header;
153  UINT16 Length;
155 
156 ///
157 /// IRQ Descriptor.
158 ///
159 typedef PACKED struct {
163 
164 ///
165 /// IRQ Descriptor.
166 ///
167 typedef PACKED struct {
169  UINT16 Mask;
172 
173 ///
174 /// DMA Descriptor.
175 ///
176 typedef PACKED struct {
181 
182 ///
183 /// I/O Port Descriptor
184 ///
185 typedef PACKED struct {
191  UINT8 Length;
193 
194 ///
195 /// Fixed Location I/O Port Descriptor.
196 ///
197 typedef PACKED struct {
200  UINT8 Length;
202 
203 ///
204 /// 24-Bit Memory Range Descriptor
205 ///
206 typedef PACKED struct {
212  UINT16 Length;
214 
215 ///
216 /// 32-Bit Memory Range Descriptor
217 ///
218 typedef PACKED struct {
224  UINT32 Length;
226 
227 ///
228 /// Fixed 32-Bit Fixed Memory Range Descriptor
229 ///
230 typedef PACKED struct {
234  UINT32 Length;
236 
237 ///
238 /// QWORD Address Space Descriptor
239 ///
240 typedef PACKED struct {
242  UINT8 ResType;
243  UINT8 GenFlag;
249  UINT64 AddrLen;
251 
252 ///
253 /// DWORD Address Space Descriptor
254 ///
255 typedef PACKED struct {
257  UINT8 ResType;
258  UINT8 GenFlag;
264  UINT32 AddrLen;
266 
267 ///
268 /// WORD Address Space Descriptor
269 ///
270 typedef PACKED struct {
272  UINT8 ResType;
273  UINT8 GenFlag;
279  UINT16 AddrLen;
281 
282 ///
283 /// Extended Interrupt Descriptor
284 ///
285 typedef PACKED struct {
291 
292 #pragma pack()
293 
294 ///
295 /// The End tag identifies an end of resource data.
296 ///
297 typedef struct {
301 
302 //
303 // General use definitions
304 //
305 #define EFI_ACPI_RESERVED_BYTE 0x00
306 #define EFI_ACPI_RESERVED_WORD 0x0000
307 #define EFI_ACPI_RESERVED_DWORD 0x00000000
308 #define EFI_ACPI_RESERVED_QWORD 0x0000000000000000
309 
310 //
311 // Resource Type Specific Flags
312 // Ref ACPI specification 6.4.3.5.5
313 //
314 // Bit [0] : Write Status, _RW
315 //
316 #define EFI_ACPI_MEMORY_RESOURCE_SPECIFIC_FLAG_READ_WRITE (1 << 0)
317 #define EFI_ACPI_MEMORY_RESOURCE_SPECIFIC_FLAG_READ_ONLY (0 << 0)
318 //
319 // Bit [2:1] : Memory Attributes, _MEM
320 //
321 #define EFI_ACPI_MEMORY_RESOURCE_SPECIFIC_FLAG_NON_CACHEABLE (0 << 1)
322 #define EFI_ACPI_MEMORY_RESOURCE_SPECIFIC_FLAG_CACHEABLE (1 << 1)
323 #define EFI_ACPI_MEMORY_RESOURCE_SPECIFIC_FLAG_CACHEABLE_WRITE_COMBINING (2 << 1)
324 #define EFI_ACPI_MEMORY_RESOURCE_SPECIFIC_FLAG_CACHEABLE_PREFETCHABLE (3 << 1)
325 //
326 // Bit [4:3] : Memory Attributes, _MTP
327 //
328 #define EFI_ACPI_MEMORY_RESOURCE_SPECIFIC_FLAG_ADDRESS_RANGE_MEMORY (0 << 3)
329 #define EFI_ACPI_MEMORY_RESOURCE_SPECIFIC_FLAG_ADDRESS_RANGE_RESERVED (1 << 3)
330 #define EFI_ACPI_MEMORY_RESOURCE_SPECIFIC_FLAG_ADDRESS_RANGE_ACPI (2 << 3)
331 #define EFI_APCI_MEMORY_RESOURCE_SPECIFIC_FLAG_ADDRESS_RANGE_NVS (3 << 3)
332 //
333 // Bit [5] : Memory to I/O Translation, _TTP
334 //
335 #define EFI_ACPI_MEMORY_RESOURCE_SPECIFIC_FLAG_TYPE_TRANSLATION (1 << 5)
336 #define EFI_ACPI_MEMORY_RESOURCE_SPECIFIC_FLAG_TYPE_STATIC (0 << 5)
337 
338 //
339 // IRQ Information
340 // Ref ACPI specification 6.4.2.1
341 //
342 #define EFI_ACPI_IRQ_SHARABLE_MASK 0x10
343 #define EFI_ACPI_IRQ_SHARABLE 0x10
344 
345 #define EFI_ACPI_IRQ_POLARITY_MASK 0x08
346 #define EFI_ACPI_IRQ_HIGH_TRUE 0x00
347 #define EFI_ACPI_IRQ_LOW_FALSE 0x08
348 
349 #define EFI_ACPI_IRQ_MODE 0x01
350 #define EFI_ACPI_IRQ_LEVEL_TRIGGERED 0x00
351 #define EFI_ACPI_IRQ_EDGE_TRIGGERED 0x01
352 
353 //
354 // DMA Information
355 // Ref ACPI specification 6.4.2.2
356 //
357 #define EFI_ACPI_DMA_SPEED_TYPE_MASK 0x60
358 #define EFI_ACPI_DMA_SPEED_TYPE_COMPATIBILITY 0x00
359 #define EFI_ACPI_DMA_SPEED_TYPE_A 0x20
360 #define EFI_ACPI_DMA_SPEED_TYPE_B 0x40
361 #define EFI_ACPI_DMA_SPEED_TYPE_F 0x60
362 
363 #define EFI_ACPI_DMA_BUS_MASTER_MASK 0x04
364 #define EFI_ACPI_DMA_BUS_MASTER 0x04
365 
366 #define EFI_ACPI_DMA_TRANSFER_TYPE_MASK 0x03
367 #define EFI_ACPI_DMA_TRANSFER_TYPE_8_BIT 0x00
368 #define EFI_ACPI_DMA_TRANSFER_TYPE_8_BIT_AND_16_BIT 0x01
369 #define EFI_ACPI_DMA_TRANSFER_TYPE_16_BIT 0x10
370 
371 //
372 // IO Information
373 // Ref ACPI specification 6.4.2.5
374 //
375 #define EFI_ACPI_IO_DECODE_MASK 0x01
376 #define EFI_ACPI_IO_DECODE_16_BIT 0x01
377 #define EFI_ACPI_IO_DECODE_10_BIT 0x00
378 
379 //
380 // Memory Information
381 // Ref ACPI specification 6.4.3.4
382 //
383 #define EFI_ACPI_MEMORY_WRITE_STATUS_MASK 0x01
384 #define EFI_ACPI_MEMORY_WRITABLE 0x01
385 #define EFI_ACPI_MEMORY_NON_WRITABLE 0x00
386 
387 //
388 // Ensure proper structure formats
389 //
390 #pragma pack(1)
391 //
392 // ACPI 1.0b table structures
393 //
394 
395 ///
396 /// Root System Description Pointer Structure.
397 ///
398 typedef struct {
401  UINT8 OemId[6];
405 
406 //
407 // Root System Description Table
408 // No definition needed as it is a common description table header, the same with
409 // EFI_ACPI_DESCRIPTION_HEADER, followed by a variable number of UINT32 table pointers.
410 //
411 
412 ///
413 /// RSDT Revision (as defined in ACPI 1.0b specification).
414 ///
415 #define EFI_ACPI_1_0_ROOT_SYSTEM_DESCRIPTION_TABLE_REVISION 0x01
416 
417 ///
418 /// Fixed ACPI Description Table Structure (FADT).
419 ///
420 typedef struct {
462 
463 ///
464 /// FADT Version (as defined in ACPI 1.0b specification).
465 ///
466 #define EFI_ACPI_1_0_FIXED_ACPI_DESCRIPTION_TABLE_REVISION 0x01
467 
468 #define EFI_ACPI_1_0_INT_MODE_DUAL_PIC 0
469 #define EFI_ACPI_1_0_INT_MODE_MULTIPLE_APIC 1
470 
471 //
472 // Fixed ACPI Description Table Fixed Feature Flags
473 // All other bits are reserved and must be set to 0.
474 //
475 #define EFI_ACPI_1_0_WBINVD BIT0
476 #define EFI_ACPI_1_0_WBINVD_FLUSH BIT1
477 #define EFI_ACPI_1_0_PROC_C1 BIT2
478 #define EFI_ACPI_1_0_P_LVL2_UP BIT3
479 #define EFI_ACPI_1_0_PWR_BUTTON BIT4
480 #define EFI_ACPI_1_0_SLP_BUTTON BIT5
481 #define EFI_ACPI_1_0_FIX_RTC BIT6
482 #define EFI_ACPI_1_0_RTC_S4 BIT7
483 #define EFI_ACPI_1_0_TMR_VAL_EXT BIT8
484 #define EFI_ACPI_1_0_DCK_CAP BIT9
485 
486 ///
487 /// Firmware ACPI Control Structure.
488 ///
489 typedef struct {
498 
499 ///
500 /// Firmware Control Structure Feature Flags.
501 /// All other bits are reserved and must be set to 0.
502 ///
503 #define EFI_ACPI_1_0_S4BIOS_F BIT0
504 
505 ///
506 /// Multiple APIC Description Table header definition. The rest of the table
507 /// must be defined in a platform-specific manner.
508 ///
509 typedef struct {
514 
515 ///
516 /// MADT Revision (as defined in ACPI 1.0b specification).
517 ///
518 #define EFI_ACPI_1_0_MULTIPLE_APIC_DESCRIPTION_TABLE_REVISION 0x01
519 
520 ///
521 /// Multiple APIC Flags
522 /// All other bits are reserved and must be set to 0.
523 ///
524 #define EFI_ACPI_1_0_PCAT_COMPAT BIT0
525 
526 //
527 // Multiple APIC Description Table APIC structure types
528 // All other values between 0x05 an 0xFF are reserved and
529 // will be ignored by OSPM.
530 //
531 #define EFI_ACPI_1_0_PROCESSOR_LOCAL_APIC 0x00
532 #define EFI_ACPI_1_0_IO_APIC 0x01
533 #define EFI_ACPI_1_0_INTERRUPT_SOURCE_OVERRIDE 0x02
534 #define EFI_ACPI_1_0_NON_MASKABLE_INTERRUPT_SOURCE 0x03
535 #define EFI_ACPI_1_0_LOCAL_APIC_NMI 0x04
536 
537 //
538 // APIC Structure Definitions
539 //
540 
541 ///
542 /// Processor Local APIC Structure Definition.
543 ///
544 typedef struct {
551 
552 ///
553 /// Local APIC Flags. All other bits are reserved and must be 0.
554 ///
555 #define EFI_ACPI_1_0_LOCAL_APIC_ENABLED BIT0
556 
557 ///
558 /// IO APIC Structure.
559 ///
560 typedef struct {
568 
569 ///
570 /// Interrupt Source Override Structure.
571 ///
572 typedef struct {
580 
581 ///
582 /// Non-Maskable Interrupt Source Structure.
583 ///
584 typedef struct {
590 
591 ///
592 /// Local APIC NMI Structure.
593 ///
594 typedef struct {
601 
602 ///
603 /// Smart Battery Description Table (SBST)
604 ///
605 typedef struct {
611 
612 //
613 // Known table signatures
614 //
615 
616 ///
617 /// "RSD PTR " Root System Description Pointer.
618 ///
619 #define EFI_ACPI_1_0_ROOT_SYSTEM_DESCRIPTION_POINTER_SIGNATURE SIGNATURE_64('R', 'S', 'D', ' ', 'P', 'T', 'R', ' ')
620 
621 ///
622 /// "APIC" Multiple APIC Description Table.
623 ///
624 #define EFI_ACPI_1_0_APIC_SIGNATURE SIGNATURE_32('A', 'P', 'I', 'C')
625 
626 ///
627 /// "DSDT" Differentiated System Description Table.
628 ///
629 #define EFI_ACPI_1_0_DIFFERENTIATED_SYSTEM_DESCRIPTION_TABLE_SIGNATURE SIGNATURE_32('D', 'S', 'D', 'T')
630 
631 ///
632 /// "FACS" Firmware ACPI Control Structure.
633 ///
634 #define EFI_ACPI_1_0_FIRMWARE_ACPI_CONTROL_STRUCTURE_SIGNATURE SIGNATURE_32('F', 'A', 'C', 'S')
635 
636 ///
637 /// "FACP" Fixed ACPI Description Table.
638 ///
639 #define EFI_ACPI_1_0_FIXED_ACPI_DESCRIPTION_TABLE_SIGNATURE SIGNATURE_32('F', 'A', 'C', 'P')
640 
641 ///
642 /// "PSDT" Persistent System Description Table.
643 ///
644 #define EFI_ACPI_1_0_PERSISTENT_SYSTEM_DESCRIPTION_TABLE_SIGNATURE SIGNATURE_32('P', 'S', 'D', 'T')
645 
646 ///
647 /// "RSDT" Root System Description Table.
648 ///
649 #define EFI_ACPI_1_0_ROOT_SYSTEM_DESCRIPTION_TABLE_SIGNATURE SIGNATURE_32('R', 'S', 'D', 'T')
650 
651 ///
652 /// "SBST" Smart Battery Specification Table.
653 ///
654 #define EFI_ACPI_1_0_SMART_BATTERY_SPECIFICATION_TABLE_SIGNATURE SIGNATURE_32('S', 'B', 'S', 'T')
655 
656 ///
657 /// "SSDT" Secondary System Description Table.
658 ///
659 #define EFI_ACPI_1_0_SECONDARY_SYSTEM_DESCRIPTION_TABLE_SIGNATURE SIGNATURE_32('S', 'S', 'D', 'T')
660 
661 #pragma pack()
662 
663 #endif
PACKED struct @460 EFI_ACPI_IRQ_NOFLAG_DESCRIPTOR
IRQ Descriptor.
EFI_ACPI_DESCRIPTION_HEADER Header
Definition: Acpi10.h:421
UINT8 Alignment
Definition: Acpi10.h:190
PACKED struct @457 EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR
The commond definition of QWORD, DWORD, and WORD Address Space Descriptors.
UINT16 Mask
Definition: Acpi10.h:161
UINT8 Type
Definition: Acpi10.h:141
UINT8 SpecificFlag
Definition: Acpi10.h:128
UINT16 Len
Definition: Acpi10.h:125
UINT16 BaseAddressMin
Definition: Acpi10.h:188
Interrupt Source Override Structure.
Definition: Acpi10.h:572
UINT8 Information
Definition: Acpi10.h:170
Processor Local APIC Structure Definition.
Definition: Acpi10.h:544
Fixed ACPI Description Table Structure (FADT).
Definition: Acpi10.h:420
UINT8 InterruptVectorFlags
Definition: Acpi10.h:287
The End tag identifies an end of resource data.
Definition: Acpi10.h:297
unsigned int UINT32
Definition: ProcessorBind.h:56
UINT8 Length
Definition: Acpi10.h:139
PACKED struct @471 EFI_ACPI_EXTENDED_INTERRUPT_DESCRIPTOR
Extended Interrupt Descriptor.
EFI_ACPI_DESCRIPTION_HEADER Header
Definition: Acpi10.h:606
UINT64 AddrTranslationOffset
Definition: Acpi10.h:132
PACKED struct @469 EFI_ACPI_DWORD_ADDRESS_SPACE_DESCRIPTOR
DWORD Address Space Descriptor.
Non-Maskable Interrupt Source Structure.
Definition: Acpi10.h:584
Common table header, this prefaces all ACPI tables, including FACS, but excluding the RSD PTR structu...
Definition: Acpi10.h:25
#define PACKED
Definition: Base.h:256
UINT8 ResType
Definition: Acpi10.h:126
unsigned char UINT8
Definition: ProcessorBind.h:62
UINT16 BaseAddressMax
Definition: Acpi10.h:189
Multiple APIC Description Table header definition.
Definition: Acpi10.h:509
FILE_LICENCE(BSD3)
UINT64 AddrSpaceGranularity
Definition: Acpi10.h:129
PACKED struct @461 EFI_ACPI_IRQ_DESCRIPTOR
IRQ Descriptor.
Root System Description Pointer Structure.
Definition: Acpi10.h:398
UINT8 Name
Definition: Acpi10.h:140
UINT64 AddrLen
Definition: Acpi10.h:133
IO APIC Structure.
Definition: Acpi10.h:560
UINT32 InterruptNumber[1]
Definition: Acpi10.h:289
Local APIC NMI Structure.
Definition: Acpi10.h:594
unsigned short UINT16
Definition: ProcessorBind.h:58
UINT8 Reserved
Must be zero.
Definition: Acpi30.h:42
This file contains AML code definition in the latest ACPI spec.
PACKED struct @463 EFI_ACPI_IO_PORT_DESCRIPTOR
I/O Port Descriptor.
The common ACPI description table header.
Definition: Acpi10.h:34
PACKED struct @465 EFI_ACPI_24_BIT_MEMORY_RANGE_DESCRIPTOR
24-Bit Memory Range Descriptor
PACKED struct @464 EFI_ACPI_FIXED_LOCATION_IO_PORT_DESCRIPTOR
Fixed Location I/O Port Descriptor.
unsigned long long UINT64
Definition: ProcessorBind.h:54
PACKED struct @462 EFI_ACPI_DMA_DESCRIPTOR
DMA Descriptor.
PACKED struct @466 EFI_ACPI_32_BIT_MEMORY_RANGE_DESCRIPTOR
32-Bit Memory Range Descriptor
UINT8 ChannelMask
Definition: Acpi10.h:178
UINT8 Desc
Definition: Acpi10.h:124
PACKED struct @467 EFI_ACPI_32_BIT_FIXED_MEMORY_RANGE_DESCRIPTOR
Fixed 32-Bit Fixed Memory Range Descriptor.
UINT64 AddrRangeMax
Definition: Acpi10.h:131
PACKED struct @458::@472 Bits
UINT16 BaseAddress
Definition: Acpi10.h:199
Smart Battery Description Table (SBST)
Definition: Acpi10.h:605
UINT8 GenFlag
Definition: Acpi10.h:127
Firmware ACPI Control Structure.
Definition: Acpi10.h:489
UINT8 InterruptTableLength
Definition: Acpi10.h:288
PACKED struct @470 EFI_ACPI_WORD_ADDRESS_SPACE_DESCRIPTOR
WORD Address Space Descriptor.
UINT64 AddrRangeMin
Definition: Acpi10.h:130
PACKED union @458 ACPI_SMALL_RESOURCE_HEADER
PACKED struct @459 ACPI_LARGE_RESOURCE_HEADER
PACKED struct @468 EFI_ACPI_QWORD_ADDRESS_SPACE_DESCRIPTOR
QWORD Address Space Descriptor.
PACKED union @459::@473 Header
Definition: Acpi10.h:160
UINT8 Byte
Definition: Acpi10.h:137