]> git.proxmox.com Git - mirror_edk2.git/blobdiff - MdePkg/Include/IndustryStandard/Acpi10.h
MdePkg: Fix ACPI NFIT GUID definitions
[mirror_edk2.git] / MdePkg / Include / IndustryStandard / Acpi10.h
index 7afb678a9917c8a33b1af96718da49443b0d4d76..635030ec5a607e1cf5737351a9d95616a1a42f9e 100644 (file)
@@ -1,22 +1,24 @@
 /** @file   \r
   ACPI 1.0b definitions from the ACPI Specification, revision 1.0b\r
 \r
-  Copyright (c) 2006 - 2008, Intel Corporation\r
-  All rights reserved. This program and the accompanying materials                          \r
-  are licensed and made available under the terms and conditions of the BSD License         \r
-  which accompanies this distribution.  The full text of the license may be found at        \r
-  http://opensource.org/licenses/bsd-license.php                                            \r
-\r
-  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,                     \r
-  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.             \r
+Copyright (c) 2006 - 2011, Intel Corporation. All rights reserved.<BR>\r
+This program and the accompanying materials are licensed and made available under \r
+the terms and conditions of the BSD License that accompanies this distribution.  \r
+The full text of the license may be found at\r
+http://opensource.org/licenses/bsd-license.php.                                          \r
+    \r
+THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,                     \r
+WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.             \r
 **/\r
 \r
 #ifndef _ACPI_1_0_H_\r
 #define _ACPI_1_0_H_\r
 \r
+#include <IndustryStandard/AcpiAml.h>\r
+\r
 ///\r
 /// Common table header, this prefaces all ACPI tables, including FACS, but\r
-/// excluding the RSD PTR structure\r
+/// excluding the RSD PTR structure.\r
 ///\r
 typedef struct {\r
   UINT32  Signature;\r
@@ -25,7 +27,7 @@ typedef struct {
 \r
 #pragma pack(1)\r
 ///\r
-/// Common ACPI description table header.  This structure prefaces most ACPI tables.\r
+/// The common ACPI description table header.  This structure prefaces most ACPI tables.\r
 ///\r
 typedef struct {\r
   UINT32  Signature;\r
@@ -43,8 +45,57 @@ typedef struct {
 //\r
 // Define for Desriptor\r
 //\r
-#define ACPI_ADDRESS_SPACE_DESCRIPTOR 0x8A\r
-#define ACPI_END_TAG_DESCRIPTOR       0x79\r
+#define ACPI_SMALL_ITEM_FLAG                   0x00\r
+#define ACPI_LARGE_ITEM_FLAG                   0x01\r
+\r
+//\r
+// Small Item Descriptor Name\r
+//\r
+#define ACPI_SMALL_IRQ_DESCRIPTOR_NAME                       0x04\r
+#define ACPI_SMALL_DMA_DESCRIPTOR_NAME                       0x05\r
+#define ACPI_SMALL_START_DEPENDENT_DESCRIPTOR_NAME           0x06\r
+#define ACPI_SMALL_END_DEPENDENT_DESCRIPTOR_NAME             0x07\r
+#define ACPI_SMALL_IO_PORT_DESCRIPTOR_NAME                   0x08\r
+#define ACPI_SMALL_FIXED_IO_PORT_DESCRIPTOR_NAME             0x09\r
+#define ACPI_SMALL_VENDOR_DEFINED_DESCRIPTOR_NAME            0x0E\r
+#define ACPI_SMALL_END_TAG_DESCRIPTOR_NAME                   0x0F\r
+\r
+//\r
+// Large Item Descriptor Name\r
+//\r
+#define ACPI_LARGE_24_BIT_MEMORY_RANGE_DESCRIPTOR_NAME       0x01\r
+#define ACPI_LARGE_VENDOR_DEFINED_DESCRIPTOR_NAME            0x04\r
+#define ACPI_LARGE_32_BIT_MEMORY_RANGE_DESCRIPTOR_NAME       0x05\r
+#define ACPI_LARGE_32_BIT_FIXED_MEMORY_RANGE_DESCRIPTOR_NAME 0x06\r
+#define ACPI_LARGE_DWORD_ADDRESS_SPACE_DESCRIPTOR_NAME       0x07\r
+#define ACPI_LARGE_WORD_ADDRESS_SPACE_DESCRIPTOR_NAME        0x08\r
+#define ACPI_LARGE_EXTENDED_IRQ_DESCRIPTOR_NAME              0x09\r
+#define ACPI_LARGE_QWORD_ADDRESS_SPACE_DESCRIPTOR_NAME       0x0A\r
+\r
+//\r
+// Small Item Descriptor Value\r
+//\r
+#define ACPI_IRQ_NOFLAG_DESCRIPTOR                0x22\r
+#define ACPI_IRQ_DESCRIPTOR                       0x23\r
+#define ACPI_DMA_DESCRIPTOR                       0x2A\r
+#define ACPI_START_DEPENDENT_DESCRIPTOR           0x30\r
+#define ACPI_START_DEPENDENT_EX_DESCRIPTOR        0x31\r
+#define ACPI_END_DEPENDENT_DESCRIPTOR             0x38\r
+#define ACPI_IO_PORT_DESCRIPTOR                   0x47\r
+#define ACPI_FIXED_LOCATION_IO_PORT_DESCRIPTOR    0x4B\r
+#define ACPI_END_TAG_DESCRIPTOR                   0x79\r
+\r
+//\r
+// Large Item Descriptor Value\r
+//\r
+#define ACPI_24_BIT_MEMORY_RANGE_DESCRIPTOR       0x81\r
+#define ACPI_32_BIT_MEMORY_RANGE_DESCRIPTOR       0x85\r
+#define ACPI_32_BIT_FIXED_MEMORY_RANGE_DESCRIPTOR 0x86\r
+#define ACPI_DWORD_ADDRESS_SPACE_DESCRIPTOR       0x87\r
+#define ACPI_WORD_ADDRESS_SPACE_DESCRIPTOR        0x88\r
+#define ACPI_EXTENDED_INTERRUPT_DESCRIPTOR        0x89\r
+#define ACPI_QWORD_ADDRESS_SPACE_DESCRIPTOR       0x8A\r
+#define ACPI_ADDRESS_SPACE_DESCRIPTOR             0x8A\r
 \r
 //\r
 // Resource Type\r
@@ -54,7 +105,7 @@ typedef struct {
 #define ACPI_ADDRESS_SPACE_TYPE_BUS   0x02\r
 \r
 ///\r
-/// Power Management Timer frequency is fixed at 3.579545MHz\r
+/// Power Management Timer frequency is fixed at 3.579545MHz.\r
 ///\r
 #define ACPI_TIMER_FREQUENCY       3579545\r
 \r
@@ -65,9 +116,9 @@ typedef struct {
 \r
 ///\r
 /// The commond definition of QWORD, DWORD, and WORD\r
-/// Address Space Descriptors\r
+/// Address Space Descriptors.\r
 ///\r
-typedef struct {\r
+typedef PACKED struct {\r
   UINT8   Desc;\r
   UINT16  Len;\r
   UINT8   ResType;\r
@@ -80,8 +131,167 @@ typedef struct {
   UINT64  AddrLen;\r
 } EFI_ACPI_ADDRESS_SPACE_DESCRIPTOR;\r
 \r
+typedef PACKED union {\r
+  UINT8     Byte;\r
+  PACKED struct {\r
+    UINT8 Length : 3;\r
+    UINT8 Name : 4;\r
+    UINT8 Type : 1;\r
+  } Bits;\r
+} ACPI_SMALL_RESOURCE_HEADER;\r
+\r
+typedef PACKED struct {\r
+  PACKED union {\r
+    UINT8 Byte;\r
+    PACKED struct {\r
+      UINT8 Name : 7;\r
+      UINT8 Type : 1;\r
+    }Bits;\r
+  } Header;\r
+  UINT16 Length;\r
+} ACPI_LARGE_RESOURCE_HEADER;\r
+\r
+///\r
+/// IRQ Descriptor.\r
+///\r
+typedef PACKED struct {\r
+  ACPI_SMALL_RESOURCE_HEADER   Header;\r
+  UINT16                       Mask;\r
+} EFI_ACPI_IRQ_NOFLAG_DESCRIPTOR;\r
+\r
+///\r
+/// IRQ Descriptor.\r
+///\r
+typedef PACKED struct {\r
+  ACPI_SMALL_RESOURCE_HEADER   Header;\r
+  UINT16                       Mask;\r
+  UINT8                        Information;\r
+} EFI_ACPI_IRQ_DESCRIPTOR;\r
+\r
+///\r
+/// DMA Descriptor.\r
+///\r
+typedef PACKED struct {\r
+  ACPI_SMALL_RESOURCE_HEADER   Header;\r
+  UINT8                        ChannelMask;\r
+  UINT8                        Information;\r
+} EFI_ACPI_DMA_DESCRIPTOR;\r
+\r
+///\r
+/// I/O Port Descriptor\r
+///\r
+typedef PACKED struct {\r
+  ACPI_SMALL_RESOURCE_HEADER   Header;\r
+  UINT8                        Information;\r
+  UINT16                       BaseAddressMin;\r
+  UINT16                       BaseAddressMax;\r
+  UINT8                        Alignment;\r
+  UINT8                        Length;\r
+} EFI_ACPI_IO_PORT_DESCRIPTOR;\r
+\r
+///\r
+/// Fixed Location I/O Port Descriptor.\r
+///\r
+typedef PACKED struct {\r
+  ACPI_SMALL_RESOURCE_HEADER   Header;\r
+  UINT16                       BaseAddress;\r
+  UINT8                        Length;\r
+} EFI_ACPI_FIXED_LOCATION_IO_PORT_DESCRIPTOR;\r
+\r
+///\r
+/// 24-Bit Memory Range Descriptor\r
+///\r
+typedef PACKED struct {\r
+  ACPI_LARGE_RESOURCE_HEADER    Header;\r
+  UINT8                         Information;\r
+  UINT16                        BaseAddressMin;\r
+  UINT16                        BaseAddressMax;\r
+  UINT16                        Alignment;\r
+  UINT16                        Length;\r
+} EFI_ACPI_24_BIT_MEMORY_RANGE_DESCRIPTOR;\r
+\r
+///\r
+/// 32-Bit Memory Range Descriptor\r
+///\r
+typedef PACKED struct {\r
+  ACPI_LARGE_RESOURCE_HEADER    Header;\r
+  UINT8                         Information;\r
+  UINT32                        BaseAddressMin;\r
+  UINT32                        BaseAddressMax;\r
+  UINT32                        Alignment;\r
+  UINT32                        Length;\r
+} EFI_ACPI_32_BIT_MEMORY_RANGE_DESCRIPTOR;\r
+\r
+///\r
+/// Fixed 32-Bit Fixed Memory Range Descriptor\r
+///\r
+typedef PACKED struct {\r
+  ACPI_LARGE_RESOURCE_HEADER    Header;\r
+  UINT8                         Information;\r
+  UINT32                        BaseAddress;\r
+  UINT32                        Length;\r
+} EFI_ACPI_32_BIT_FIXED_MEMORY_RANGE_DESCRIPTOR;\r
+\r
+///\r
+/// QWORD Address Space Descriptor\r
+///\r
+typedef PACKED struct {\r
+  ACPI_LARGE_RESOURCE_HEADER    Header;\r
+  UINT8                         ResType;\r
+  UINT8                         GenFlag;\r
+  UINT8                         SpecificFlag;\r
+  UINT64                        AddrSpaceGranularity;\r
+  UINT64                        AddrRangeMin;\r
+  UINT64                        AddrRangeMax;\r
+  UINT64                        AddrTranslationOffset;\r
+  UINT64                        AddrLen;\r
+} EFI_ACPI_QWORD_ADDRESS_SPACE_DESCRIPTOR;\r
+\r
+///\r
+/// DWORD Address Space Descriptor\r
+///\r
+typedef PACKED struct {\r
+  ACPI_LARGE_RESOURCE_HEADER    Header;\r
+  UINT8                         ResType;\r
+  UINT8                         GenFlag;\r
+  UINT8                         SpecificFlag;\r
+  UINT32                        AddrSpaceGranularity;\r
+  UINT32                        AddrRangeMin;\r
+  UINT32                        AddrRangeMax;\r
+  UINT32                        AddrTranslationOffset;\r
+  UINT32                        AddrLen;\r
+} EFI_ACPI_DWORD_ADDRESS_SPACE_DESCRIPTOR;\r
+\r
+///\r
+/// WORD Address Space Descriptor\r
+///\r
+typedef PACKED struct {\r
+  ACPI_LARGE_RESOURCE_HEADER    Header;\r
+  UINT8                         ResType;\r
+  UINT8                         GenFlag;\r
+  UINT8                         SpecificFlag;\r
+  UINT16                        AddrSpaceGranularity;\r
+  UINT16                        AddrRangeMin;\r
+  UINT16                        AddrRangeMax;\r
+  UINT16                        AddrTranslationOffset;\r
+  UINT16                        AddrLen;\r
+} EFI_ACPI_WORD_ADDRESS_SPACE_DESCRIPTOR;\r
+\r
+///\r
+/// Extended Interrupt Descriptor\r
+///\r
+typedef PACKED struct {\r
+  ACPI_LARGE_RESOURCE_HEADER    Header;\r
+  UINT8                         InterruptVectorFlags;\r
+  UINT8                         InterruptTableLength;\r
+  UINT32                        InterruptNumber[1];\r
+} EFI_ACPI_EXTENDED_INTERRUPT_DESCRIPTOR;\r
+\r
 #pragma pack()\r
 \r
+///\r
+/// The End tag identifies an end of resource data.\r
+///\r
 typedef struct {\r
   UINT8 Desc;\r
   UINT8 Checksum;\r
@@ -123,6 +333,55 @@ typedef struct {
 #define EFI_ACPI_MEMORY_RESOURCE_SPECIFIC_FLAG_TYPE_TRANSLATION          (1 << 5)\r
 #define EFI_ACPI_MEMORY_RESOURCE_SPECIFIC_FLAG_TYPE_STATIC               (0 << 5)\r
 \r
+//\r
+// IRQ Information\r
+// Ref ACPI specification 6.4.2.1\r
+//\r
+#define EFI_ACPI_IRQ_SHARABLE_MASK                      0x10\r
+#define   EFI_ACPI_IRQ_SHARABLE                         0x10\r
+\r
+#define EFI_ACPI_IRQ_POLARITY_MASK                      0x08\r
+#define   EFI_ACPI_IRQ_HIGH_TRUE                        0x00\r
+#define   EFI_ACPI_IRQ_LOW_FALSE                        0x08\r
+\r
+#define EFI_ACPI_IRQ_MODE                               0x01\r
+#define   EFI_ACPI_IRQ_LEVEL_TRIGGERED                  0x00\r
+#define   EFI_ACPI_IRQ_EDGE_TRIGGERED                   0x01\r
+\r
+//\r
+// DMA Information\r
+// Ref ACPI specification 6.4.2.2\r
+//\r
+#define EFI_ACPI_DMA_SPEED_TYPE_MASK                    0x60\r
+#define   EFI_ACPI_DMA_SPEED_TYPE_COMPATIBILITY         0x00\r
+#define   EFI_ACPI_DMA_SPEED_TYPE_A                     0x20\r
+#define   EFI_ACPI_DMA_SPEED_TYPE_B                     0x40\r
+#define   EFI_ACPI_DMA_SPEED_TYPE_F                     0x60\r
+                                               \r
+#define EFI_ACPI_DMA_BUS_MASTER_MASK                    0x04\r
+#define   EFI_ACPI_DMA_BUS_MASTER                       0x04\r
+\r
+#define EFI_ACPI_DMA_TRANSFER_TYPE_MASK                 0x03\r
+#define   EFI_ACPI_DMA_TRANSFER_TYPE_8_BIT              0x00\r
+#define   EFI_ACPI_DMA_TRANSFER_TYPE_8_BIT_AND_16_BIT   0x01\r
+#define   EFI_ACPI_DMA_TRANSFER_TYPE_16_BIT             0x10\r
+\r
+//\r
+// IO Information\r
+// Ref ACPI specification 6.4.2.5\r
+//\r
+#define EFI_ACPI_IO_DECODE_MASK                         0x01\r
+#define   EFI_ACPI_IO_DECODE_16_BIT                     0x01\r
+#define   EFI_ACPI_IO_DECODE_10_BIT                     0x00\r
+\r
+//\r
+// Memory Information\r
+// Ref ACPI specification 6.4.3.4\r
+//\r
+#define EFI_ACPI_MEMORY_WRITE_STATUS_MASK               0x01\r
+#define   EFI_ACPI_MEMORY_WRITABLE                      0x01\r
+#define   EFI_ACPI_MEMORY_NON_WRITABLE                  0x00\r
+\r
 //\r
 // Ensure proper structure formats\r
 //\r
@@ -132,7 +391,7 @@ typedef struct {
 //\r
 \r
 ///\r
-/// Root System Description Pointer Structure\r
+/// Root System Description Pointer Structure.\r
 ///\r
 typedef struct {\r
   UINT64  Signature;\r
@@ -149,12 +408,12 @@ typedef struct {
 //\r
 \r
 ///\r
-/// RSDT Revision (as defined in ACPI 1.0b spec.)\r
+/// RSDT Revision (as defined in ACPI 1.0b specification).\r
 ///\r
 #define EFI_ACPI_1_0_ROOT_SYSTEM_DESCRIPTION_TABLE_REVISION 0x01\r
 \r
 ///\r
-/// Fixed ACPI Description Table Structure (FADT)\r
+/// Fixed ACPI Description Table Structure (FADT).\r
 ///\r
 typedef struct {\r
   EFI_ACPI_DESCRIPTION_HEADER Header;\r
@@ -200,10 +459,13 @@ typedef struct {
 } EFI_ACPI_1_0_FIXED_ACPI_DESCRIPTION_TABLE;\r
 \r
 ///\r
-/// FADT Version (as defined in ACPI 1.0b spec.)\r
+/// FADT Version (as defined in ACPI 1.0b specification).\r
 ///\r
 #define EFI_ACPI_1_0_FIXED_ACPI_DESCRIPTION_TABLE_REVISION  0x01\r
 \r
+#define EFI_ACPI_1_0_INT_MODE_DUAL_PIC         0\r
+#define EFI_ACPI_1_0_INT_MODE_MULTIPLE_APIC    1\r
+\r
 //\r
 // Fixed ACPI Description Table Fixed Feature Flags\r
 // All other bits are reserved and must be set to 0.\r
@@ -220,7 +482,7 @@ typedef struct {
 #define EFI_ACPI_1_0_DCK_CAP              BIT9\r
 \r
 ///\r
-/// Firmware ACPI Control Structure\r
+/// Firmware ACPI Control Structure.\r
 ///\r
 typedef struct {\r
   UINT32  Signature;\r
@@ -233,14 +495,14 @@ typedef struct {
 } EFI_ACPI_1_0_FIRMWARE_ACPI_CONTROL_STRUCTURE;\r
 \r
 ///\r
-/// Firmware Control Structure Feature Flags\r
+/// Firmware Control Structure Feature Flags.\r
 /// All other bits are reserved and must be set to 0.\r
 ///\r
 #define EFI_ACPI_1_0_S4BIOS_F             BIT0\r
 \r
 ///\r
 /// Multiple APIC Description Table header definition.  The rest of the table\r
-/// must be defined in a platform specific manner.\r
+/// must be defined in a platform-specific manner.\r
 ///\r
 typedef struct {\r
   EFI_ACPI_DESCRIPTION_HEADER Header;\r
@@ -249,7 +511,7 @@ typedef struct {
 } EFI_ACPI_1_0_MULTIPLE_APIC_DESCRIPTION_TABLE_HEADER;\r
 \r
 ///\r
-/// MADT Revision (as defined in ACPI 1.0b spec.)\r
+/// MADT Revision (as defined in ACPI 1.0b specification).\r
 ///\r
 #define EFI_ACPI_1_0_MULTIPLE_APIC_DESCRIPTION_TABLE_REVISION 0x01\r
 \r
@@ -275,7 +537,7 @@ typedef struct {
 //\r
 \r
 ///\r
-/// Processor Local APIC Structure Definition\r
+/// Processor Local APIC Structure Definition.\r
 ///\r
 typedef struct {\r
   UINT8   Type;\r
@@ -291,7 +553,7 @@ typedef struct {
 #define EFI_ACPI_1_0_LOCAL_APIC_ENABLED      BIT0\r
 \r
 ///\r
-/// IO APIC Structure\r
+/// IO APIC Structure.\r
 ///\r
 typedef struct {\r
   UINT8   Type;\r
@@ -303,7 +565,7 @@ typedef struct {
 } EFI_ACPI_1_0_IO_APIC_STRUCTURE;\r
 \r
 ///\r
-/// Interrupt Source Override Structure\r
+/// Interrupt Source Override Structure.\r
 ///\r
 typedef struct {\r
   UINT8   Type;\r
@@ -315,7 +577,7 @@ typedef struct {
 } EFI_ACPI_1_0_INTERRUPT_SOURCE_OVERRIDE_STRUCTURE;\r
 \r
 ///\r
-/// Non-Maskable Interrupt Source Structure\r
+/// Non-Maskable Interrupt Source Structure.\r
 ///\r
 typedef struct {\r
   UINT8   Type;\r
@@ -325,7 +587,7 @@ typedef struct {
 } EFI_ACPI_1_0_NON_MASKABLE_INTERRUPT_SOURCE_STRUCTURE;\r
 \r
 ///\r
-/// Local APIC NMI Structure\r
+/// Local APIC NMI Structure.\r
 ///\r
 typedef struct {\r
   UINT8   Type;\r
@@ -350,47 +612,47 @@ typedef struct {
 //\r
 \r
 ///\r
-/// "RSD PTR " Root System Description Pointer\r
+/// "RSD PTR " Root System Description Pointer.\r
 ///\r
 #define EFI_ACPI_1_0_ROOT_SYSTEM_DESCRIPTION_POINTER_SIGNATURE  SIGNATURE_64('R', 'S', 'D', ' ', 'P', 'T', 'R', ' ')\r
 \r
 ///\r
-/// "APIC" Multiple APIC Description Table\r
+/// "APIC" Multiple APIC Description Table.\r
 ///\r
 #define EFI_ACPI_1_0_APIC_SIGNATURE  SIGNATURE_32('A', 'P', 'I', 'C')\r
 \r
 ///\r
-/// "DSDT" Differentiated System Description Table\r
+/// "DSDT" Differentiated System Description Table.\r
 ///\r
 #define EFI_ACPI_1_0_DIFFERENTIATED_SYSTEM_DESCRIPTION_TABLE_SIGNATURE  SIGNATURE_32('D', 'S', 'D', 'T')\r
 \r
 ///\r
-/// "FACS" Firmware ACPI Control Structure\r
+/// "FACS" Firmware ACPI Control Structure.\r
 ///\r
 #define EFI_ACPI_1_0_FIRMWARE_ACPI_CONTROL_STRUCTURE_SIGNATURE  SIGNATURE_32('F', 'A', 'C', 'S')\r
 \r
 ///\r
-/// "FACP" Fixed ACPI Description Table\r
+/// "FACP" Fixed ACPI Description Table.\r
 ///\r
 #define EFI_ACPI_1_0_FIXED_ACPI_DESCRIPTION_TABLE_SIGNATURE  SIGNATURE_32('F', 'A', 'C', 'P')\r
 \r
 ///\r
-/// "PSDT" Persistent System Description Table\r
+/// "PSDT" Persistent System Description Table.\r
 ///\r
 #define EFI_ACPI_1_0_PERSISTENT_SYSTEM_DESCRIPTION_TABLE_SIGNATURE  SIGNATURE_32('P', 'S', 'D', 'T')\r
 \r
 ///\r
-/// "RSDT" Root System Description Table\r
+/// "RSDT" Root System Description Table.\r
 ///\r
 #define EFI_ACPI_1_0_ROOT_SYSTEM_DESCRIPTION_TABLE_SIGNATURE  SIGNATURE_32('R', 'S', 'D', 'T')\r
 \r
 ///\r
-/// "SBST" Smart Battery Specification Table\r
+/// "SBST" Smart Battery Specification Table.\r
 ///\r
 #define EFI_ACPI_1_0_SMART_BATTERY_SPECIFICATION_TABLE_SIGNATURE  SIGNATURE_32('S', 'B', 'S', 'T')\r
 \r
 ///\r
-/// "SSDT" Secondary System Description Table\r
+/// "SSDT" Secondary System Description Table.\r
 ///\r
 #define EFI_ACPI_1_0_SECONDARY_SYSTEM_DESCRIPTION_TABLE_SIGNATURE  SIGNATURE_32('S', 'S', 'D', 'T')\r
 \r