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      1 /** @file
      2 
      3   Copyright (c) 2004  - 2016, Intel Corporation. All rights reserved.<BR>
      4 
      5 
      6   This program and the accompanying materials are licensed and made available under
      7 
      8   the terms and conditions of the BSD License that accompanies this distribution.
      9 
     10   The full text of the license may be found at
     11 
     12   http://opensource.org/licenses/bsd-license.php.
     13 
     14 
     15 
     16   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
     17 
     18   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
     19 
     20 
     21 
     22 
     23 
     24 Module Name:
     25 
     26   GlobalNvsArea.h
     27 
     28 Abstract:
     29 
     30   Definition of the global NVS area protocol.  This protocol
     31   publishes the address and format of a global ACPI NVS buffer used as a communications
     32   buffer between SMM code and ASL code.
     33   The format is derived from the ACPI reference code, version 0.95.
     34 
     35   Note:  Data structures defined in this protocol are not naturally aligned.
     36 
     37 **/
     38 
     39 
     40 #ifndef _GLOBAL_NVS_AREA_H_
     41 #define _GLOBAL_NVS_AREA_H_
     42 
     43 //
     44 // Includes
     45 //
     46 #define GLOBAL_NVS_DEVICE_ENABLE 1
     47 #define GLOBAL_NVS_DEVICE_DISABLE 0
     48 
     49 //
     50 // Forward reference for pure ANSI compatibility
     51 //
     52 
     53 //EFI_FORWARD_DECLARATION (EFI_GLOBAL_NVS_AREA_PROTOCOL);
     54 
     55 //
     56 // Global NVS Area Protocol GUID
     57 //
     58 #define EFI_GLOBAL_NVS_AREA_PROTOCOL_GUID \
     59 { 0x74e1e48, 0x8132, 0x47a1, 0x8c, 0x2c, 0x3f, 0x14, 0xad, 0x9a, 0x66, 0xdc }
     60 
     61 //
     62 // Revision id - Added TPM related fields
     63 //
     64 #define GLOBAL_NVS_AREA_RIVISION_1       1
     65 
     66 //
     67 // Extern the GUID for protocol users.
     68 //
     69 extern EFI_GUID gEfiGlobalNvsAreaProtocolGuid;
     70 
     71 //
     72 // Global NVS Area definition
     73 //
     74 #pragma pack (1)
     75 typedef struct {
     76   //
     77   // Miscellaneous Dynamic Values, the definitions below need to be matched
     78   // GNVS definitions in Platform.ASL
     79   //
     80   UINT16      OperatingSystem;    // 00
     81   UINT8       SmiFunction;        // 02   SMI function call via IO Trap
     82   UINT8       SmiParameter0;      // 03
     83   UINT8       SmiParameter1;      // 04
     84   UINT8       SciFunction;        // 05   SCI function call via _L00
     85   UINT8       SciParameter0;      // 06
     86   UINT8       SciParameter1;      // 07
     87   UINT8       GlobalLock;         // 08   Global lock function call
     88   UINT8       LockParameter0;     // 09
     89   UINT8       LockParameter1;     // 10
     90   UINT32      Port80DebugValue;   // 11
     91   UINT8       LidState;           // 15   Open = 1
     92   UINT8       PowerState;         // 16   AC = 1
     93   UINT8       DebugState;         // 17
     94 
     95 
     96   //
     97   // Thermal Policy Values
     98   //
     99   UINT8       EnableThermalOffset;                        // 18 ThermalOffset for KSC
    100   UINT8       Reserved1;                           // 19
    101   UINT8       Reserved2;                           // 20
    102   UINT8       PassiveThermalTripPoint;                    // 21
    103   UINT8       PassiveTc1Value;                            // 22
    104   UINT8       PassiveTc2Value;                            // 23
    105   UINT8       PassiveTspValue;                            // 24
    106   UINT8       CriticalThermalTripPoint;                   // 25
    107   UINT8       EnableDigitalThermalSensor;                 // 26
    108   UINT8       BspDigitalThermalSensorTemperature;         // 27   Temperature of BSP
    109   UINT8       ApDigitalThermalSensorTemperature;          // 28   Temperature of AP
    110   UINT8       DigitalThermalSensorSmiFunction;            // 29   SMI function call via DTS IO Trap
    111 
    112   //
    113   // Battery Support Values
    114   //
    115   UINT8       NumberOfBatteries;      // 30
    116   UINT8       BatteryCapacity0;       // 31   Battery 0 Stored Capacity
    117   UINT8       BatteryCapacity1;       // 32   Battery 1 Stored Capacity
    118   UINT8       BatteryCapacity2;       // 33   Battery 2 Stored Capacity
    119   UINT8       BatteryStatus0;         // 34   Battery 0 Stored Status
    120   UINT8       BatteryStatus1;         // 35   Battery 1 Stored Status
    121   UINT8       BatteryStatus2;         // 36   Battery 2 Stored Status
    122 
    123   // NOTE: Do NOT Change the Offset of Revision Field
    124   UINT8       Revision;               // 37   Revision of the structure EFI_GLOBAL_NVS_AREA
    125   UINT8       Reserved3[2];           // 38:39
    126 
    127   //
    128   // Processor Configuration Values
    129   //
    130   UINT8       ApicEnable;             // 40   APIC Enabled by SBIOS (APIC Enabled = 1)
    131   UINT8       LogicalProcessorCount;  // 41   Processor Count Enabled (MP Enabled != 0)
    132   UINT8       CurentPdcState0;        // 42   PDC settings, Processor 0
    133   UINT8       CurentPdcState1;        // 43   PDC settings, Processor 1
    134   UINT8       MaximumPpcState;        // 44   Maximum PPC state
    135   UINT32      PpmFlags;               // 45:48 PPM configuration flags, same as CFGD
    136   UINT8       Reserved4[1];           // 49
    137 
    138   //
    139   // SIO Configuration Values
    140   //
    141   UINT8       DockedSioPresent;       // 50   Dock SIO Present
    142   UINT8       DockComA;               // 51     COM A Port
    143   UINT8       DockComB;               // 52     COM B Port
    144   UINT8       LptP;                   // 53     LPT Port
    145   UINT8       DockFdc;                // 54     FDC Port
    146   UINT8       OnboardCom;             // 55   Onboard COM Port
    147   UINT8       OnboardComCir;          // 56   Onboard COM CIR Port
    148 
    149   UINT8       WPCN381U;               // 57
    150   UINT8       NPCE791x;               // 58
    151   UINT8       Reserved5[1];           // 59
    152 
    153   //
    154   // Internal Graphics Device Values
    155   //
    156   UINT8       IgdState;               // 60   IGD State (Primary Display = 1)
    157   UINT8       DisplayToggleList;      // 61   Display Toggle List Selection
    158   UINT8       CurrentDeviceList;      // 62   Current Attached Device List
    159   UINT8       PreviousDeviceList;     // 63   Previous Attached Device List
    160   UINT16      CurrentDisplayState;    // 64   Current Display State
    161   UINT16      NextDisplayState;       // 66   Next Display State
    162   UINT16      SetDisplayState;        // 68   Set Display State
    163   UINT8       NumberOfValidDeviceId;  // 70   Number of Valid Device IDs
    164   UINT32      DeviceId1;              // 71   Device ID 1
    165   UINT32      DeviceId2;              // 75   Device ID 2
    166   UINT32      DeviceId3;              // 79   Device ID 3
    167   UINT32      DeviceId4;              // 83   Device ID 4
    168   UINT32      DeviceId5;              // 87   Device ID 5
    169 
    170   UINT32      AKsv0;                  // 91:94 First four bytes of AKSV (manufacturing mode)
    171   UINT8       AKsv1;                  // 95    Fifth byte of AKSV (manufacturing mode
    172 
    173   UINT8       Reserved6[7];           // 96:102
    174 
    175   //
    176   // Backlight Control Values
    177   //
    178   UINT8       BacklightControlSupport;  // 103  Backlight Control Support
    179   UINT8       BrightnessPercentage;     // 104  Brightness Level Percentage
    180 
    181   //
    182   // Ambient Light Sensor Values
    183   //
    184   UINT8       AlsEnable;              // 105  Ambient Light Sensor Enable
    185   UINT8       AlsAdjustmentFactor;    // 106  Ambient Light Adjusment Factor
    186   UINT8       LuxLowValue;            // 107  LUX Low Value
    187   UINT8       LuxHighValue;           // 108  LUX High Value
    188 
    189   UINT8       Reserved7[1];           // 109
    190 
    191   //
    192   // Extended Mobile Access Values
    193   //
    194   UINT8       EmaEnable;              // 110  EMA Enable
    195   UINT16      EmaPointer;             // 111  EMA Pointer
    196   UINT16      EmaLength;              // 113  EMA Length
    197 
    198   UINT8       Reserved8[1];           // 115
    199 
    200   //
    201   // Mobile East Fork Values
    202   //
    203   UINT8       MefEnable;              // 116 Mobile East Fork Enable
    204 
    205   //
    206   // PCIe Dock Status
    207   //
    208   UINT8       PcieDockStatus;         // 117 PCIe Dock Status
    209 
    210   UINT8       Reserved9[2];           // 118:119
    211 
    212   //
    213   // TPM Registers
    214   //
    215   UINT8       TpmPresent;             // 120 TPM Present
    216   UINT8       TpmEnable;              // 121 TPM Enable
    217 
    218   UINT8       MorData;                // 122 Memory Overwrite Request Data
    219   UINT8       TcgParamter;            // 123 Used for save the Mor and/or physical presence parameter
    220   UINT32      PPResponse;             // 124 Physical Presence request operation response
    221   UINT8       PPRequest;              // 128 Physical Presence request operation
    222   UINT8       LastPPRequest;          // 129 Last Physical Presence request operation
    223 
    224   //
    225   // SATA Values
    226   //
    227   UINT8       GtfTaskFileBufferPort0[7];    // 130  GTF Task File Buffer for Port 0
    228   UINT8       GtfTaskFileBufferPort2[7];    // 137  GTF Task File Buffer for Port 2
    229   UINT8       IdeMode;                      // 144  IDE Mode (Compatible\Enhanced)
    230   UINT8       GtfTaskFileBufferPort1[7];    // 145:151 GTF Task File Buffer for Port 1
    231 
    232   UINT8       Reserved111[10];                // 152:161
    233   UINT64      BootTimeLogAddress;           // 162:169 Boot Time Log Table Address
    234 
    235   UINT32      IgdOpRegionAddress;           // 170  IGD OpRegion Starting Address
    236   UINT8       IgdBootType;                  // 174  IGD Boot Type CMOS option
    237   UINT8       IgdPanelType;                 // 175  IGD Panel Type CMOs option
    238   UINT8       IgdTvFormat;                  // 176  IGD TV Format CMOS option
    239   UINT8       IgdTvMinor;                   // 177  IGD TV Minor Format CMOS option
    240   UINT8       IgdPanelScaling;              // 178  IGD Panel Scaling
    241   UINT8       IgdBlcConfig;                 // 179  IGD BLC Configuration
    242   UINT8       IgdBiaConfig;                 // 180  IGD BIA Configuration
    243   UINT8       IgdSscConfig;                 // 181  IGD SSC Configuration
    244   UINT8       Igd409;                       // 182  IGD 0409 Modified Settings Flag
    245   UINT8       Igd509;                       // 183  IGD 0509 Modified Settings Flag
    246   UINT8       Igd609;                       // 184  IGD 0609 Modified Settings Flag
    247   UINT8       Igd709;                       // 185  IGD 0709 Modified Settings Flag
    248   UINT8       IgdPowerConservation;         // 186  IGD Power Conservation Feature Flag
    249   UINT8       IgdDvmtMemSize;               // 187  IGD DVMT Memory Size
    250   UINT8       IgdFunc1Enable;               // 188  IGD Function 1 Enable
    251   UINT8       IgdHpllVco;                   // 189  HPLL VCO
    252   UINT32      NextStateDid1;                // 190  Next state DID1 for _DGS
    253   UINT32      NextStateDid2;                // 194  Next state DID2 for _DGS
    254   UINT32      NextStateDid3;                // 198  Next state DID3 for _DGS
    255   UINT32      NextStateDid4;                // 202  Next state DID4 for _DGS
    256   UINT32      NextStateDid5;                // 206  Next state DID5 for _DGS
    257   UINT32      NextStateDid6;                // 210  Next state DID6 for _DGS
    258   UINT32      NextStateDid7;                // 214  Next state DID7 for _DGS
    259   UINT32      NextStateDid8;                // 218  Next state DID8 for _DGS
    260   UINT8       IgdSciSmiMode;                // 222  GMCH SMI/SCI mode (0=SCI)
    261   UINT8       IgdPAVP;                      // 223  IGD PAVP data
    262   UINT8       IgdSelfRefresh;               // 224  IGD Self Refresh
    263   UINT8       PcieOSCControl;               // 225  PCIE OSC Control
    264   UINT8       NativePCIESupport;            // 226  Native PCI Express Support
    265 
    266   //
    267   // USB Sideband Deferring Support
    268   //
    269   UINT8       HostAlertVector;              // 227  GPE vector used for HOST_ALERT
    270   UINT8       HostAlertPio;                 // 228  PIO of USB device used for HOST_ALERT
    271 
    272   UINT8       Reserved112[27];               // 229
    273   UINT32      NvIgOpRegionAddress;          // 256 NVIG support
    274   UINT32      NvHmOpRegionAddress;          // 260 NVHM support
    275   UINT32      ApXmOpRegionAddress;          // 264 AMDA support
    276   UINT32      DeviceId6;                    // 268   Device ID 6
    277   UINT32      DeviceId7;                    // 272   Device ID 7
    278   UINT32      DeviceId8;                    // 276   Device ID 8
    279   UINT32      EndpointBaseAddress;          // 280 PEG Endpoint PCIe Base Address
    280   UINT32      CapStrPresence;               // 284 PEG Endpoint Capability Structure Presence
    281   UINT32      EndpointPcieCapBaseAddress;   // 288 PEG Endpoint PCIe Capability Structure Base Address
    282   UINT32      EndpointVcCapBaseAddress;     // 292 PEG Endpoint Virtual Channel Capability Structure Base Address
    283   UINT32      XPcieCfgBaseAddress;          // 296 Any Device's PCIe Config Space Base Address
    284   UINT32      OccupiedBuses1;               // 300 Occupied Buses from 0 to 31
    285   UINT32      OccupiedBuses2;               // 304 Occupied Buses from 32 to 63
    286   UINT32      OccupiedBuses3;               // 308 Occupied Buses from 64 to 95
    287   UINT32      OccupiedBuses4;               // 312 Occupied Buses from 96 to 127
    288   UINT32      OccupiedBuses5;               // 316 Occupied Buses from 128 to 159
    289   UINT32      OccupiedBuses6;               // 320 Occupied Buses from 160 to 191
    290   UINT32      OccupiedBuses7;               // 324 Occupied Buses from 192 to 223
    291   UINT32      OccupiedBuses8;               // 328 Occupied Buses from 224 to 255
    292   UINT8       UartSelection;                // 332 UART Interface Selection 0: Internal; 1: SIO
    293   UINT8       PcuUart1Enable;               // 333 PCU UART 1 Enabled
    294   UINT8       PcuUart2Enable;               // 334 PCU UART 2 Enabled
    295 
    296   UINT32      LPEBar0;                      // 335~338  LPE Bar0
    297   UINT32      LPEBar1;                      // 339~342  LPE Bar1
    298 
    299   UINT32      LPEBar2;                      // 343~346  LPE Bar2
    300   UINT8        AcSetup;                      // 347 For Ac Powered Config option - IST applet
    301   UINT8       BatterySetup;                 // 348 For Battery Powered Config option - IST applet
    302   UINT8       PlatformFlavor;               // 349 0:unknown 1: Mobile; 2: desktop
    303   UINT8       Reserved113[1];                // 350
    304 
    305   UINT8       IsctReserve;                      // 351 ISCT / AOAC Configuration
    306   UINT8       XhciMode;                     // 352 xHCI mode
    307   UINT8       PmicEnable;                   // 353 PMIC enable
    308 
    309   UINT8       LpeEnable;                    // 354 LPE enable
    310   UINT32      ISPAddr;                      // 355 ISP Base address
    311   UINT8       ISPDevSel;                    // 359 ISP device enabled selection 0: Disabled; 1: PCI Device 2; 2: PCI Device 3
    312 
    313   //
    314   // Lpss controllers
    315   //
    316   UINT32      PCIBottomAddress;            //360  ((4+8+6)*4+2)*4=296
    317   UINT32      PCITopAddress;               //364
    318 
    319   UINT32      LDMA1Addr;                   // 368
    320   UINT32      LDMA1Len;                    // 372
    321   UINT32      LDMA11Addr;                  // 376
    322   UINT32      LDMA11Len;                   // 380
    323   UINT32      PWM1Addr;                    // 384 PWM1
    324   UINT32      PWM1Len;                     // 388
    325   UINT32      PWM11Addr;                   // 392
    326   UINT32      PWM11Len;                    // 396
    327   UINT32      PWM2Addr;                    // 400 PWM2
    328   UINT32      PWM2Len;                     // 404
    329   UINT32      PWM21Addr;                   // 408
    330   UINT32      PWM21Len;                    // 412
    331   UINT32      UART1Addr;                   // 416 UART1
    332   UINT32      UART1Len;                    // 420
    333   UINT32      UART11Addr;                  // 424 UART1
    334   UINT32      UART11Len;                   // 428
    335   UINT32      UART2Addr;                   // 432 UART2
    336   UINT32      UART2Len;                    // 436
    337   UINT32      UART21Addr;                  // 440 UART2
    338   UINT32      UART21Len;                   // 444
    339   UINT32      SPIAddr;                     // 448 SPI
    340   UINT32      SPILen;                      // 452
    341   UINT32      SPI1Addr;                    // 456
    342   UINT32      SPI1Len;                     // 460
    343 
    344   UINT32      LDMA2Addr;                   // 464
    345   UINT32      LDMA2Len;                    // 468
    346   UINT32      LDMA21Addr;                  // 472
    347   UINT32      LDMA21Len;                   // 476
    348   UINT32      I2C1Addr;                    // 480 I2C1
    349   UINT32      I2C1Len;                     // 484
    350   UINT32      I2C11Addr;                   // 488 I2C1
    351   UINT32      I2C11Len;                    // 492
    352   UINT32      I2C2Addr;                    // 496 I2C2
    353   UINT32      I2C2Len;                     // 500
    354   UINT32      I2C21Addr;                   // 504 I2C2
    355   UINT32      I2C21Len;                    // 508
    356   UINT32      I2C3Addr;                    // 512 I2C3
    357   UINT32      I2C3Len;                     // 516
    358   UINT32      I2C31Addr;                   // 520 I2C3
    359   UINT32      I2C31Len;                    // 524
    360   UINT32      I2C4Addr;                    // 528 I2C4
    361   UINT32      I2C4Len;                     // 532
    362   UINT32      I2C41Addr;                   // 536 I2C4
    363   UINT32      I2C41Len;                    // 540
    364   UINT32      I2C5Addr;                    // 544 I2C5
    365   UINT32      I2C5Len;                     // 548
    366   UINT32      I2C51Addr;                   // 552 I2C5
    367   UINT32      I2C51Len;                    // 556
    368   UINT32      I2C6Addr;                    // 560 I2C6
    369   UINT32      I2C6Len;                     // 564
    370   UINT32      I2C61Addr;                   // 566 I2C6
    371   UINT32      I2C61Len;                    // 570
    372   UINT32      I2C7Addr;                    // 574 I2C7
    373   UINT32      I2C7Len;                     // 578
    374   UINT32      I2C71Addr;                   // 582 I2C7
    375   UINT32      I2C71Len;                    // 586
    376 
    377   //
    378   // Scc controllers
    379   //
    380   UINT32      eMMCAddr;                    // 590 EMMC
    381   UINT32      eMMCLen;                     // 594
    382   UINT32      eMMC1Addr;                   // 598
    383   UINT32      eMMC1Len;                    // 602
    384   UINT32      SDIOAddr;                    // 606 SDIO
    385   UINT32      SDIOLen;                     // 610
    386   UINT32      SDIO1Addr;                   // 614
    387   UINT32      SDIO1Len;                    // 618
    388   UINT32      SDCardAddr;                  // 622 SDCard
    389   UINT32      SDCardLen;                   // 626
    390   UINT32      SDCard1Addr;                 // 630
    391   UINT32      SDCard1Len;                  // 636
    392   UINT32      MipiHsiAddr;                 // 640 MIPI-HSI
    393   UINT32      MipiHsiLen;                  // 644
    394   UINT32      MipiHsi1Addr;                // 648
    395   UINT32      MipiHsi1Len;                 // 652
    396 
    397   UINT8       SdCardRemovable;                   // 656 reserve offset upto 658
    398   UINT8       HideLPSSDevices;                   // 657 Hide unsupported LPSS devices when in ACPI mode
    399   UINT8       ReservedO;                         // 658 OS Selection
    400   UINT8       Reserved00;                        // 659
    401   UINT8       Reserved01;                        // 660
    402   UINT8       Reserved02;                   // 661
    403   UINT8       Reserved03;                   // 662
    404   UINT8       Reserved04;                   // 663
    405   UINT8       Reserved05;                   // 664
    406   UINT8       Reserved06;                   // 665
    407   UINT8       Reserved07;                       // 666
    408   UINT8       Reserved08;                 // 667
    409   UINT8       Reserved09;                     // 668
    410   UINT8       Reserved0A;                     // 669
    411   UINT32      Reserved0B;       // 670
    412   UINT32      Reserved0C;        // 674
    413   UINT32      Reserved0D;   // 678
    414   UINT32      Reserved0E;    // 682
    415   UINT32      Reserved0F;   // 686
    416   UINT32      Reserved10;    // 690
    417   UINT32      Reserved11;   // 694
    418   UINT32      Reserved12;    // 698
    419   UINT32      Reserved13;   // 702
    420   UINT32      Reserved14;    // 706
    421   UINT32      Reserved15;   // 710
    422   UINT32      Reserved16;    // 714
    423   UINT8       Reserved17;
    424   UINT32      Reserved18;
    425   UINT32      Reserved19;
    426   UINT32      Reserved1A;
    427   UINT32      Reserved1B;
    428   UINT32      Reserved1C;
    429   UINT8       Reserved1D;
    430   UINT32      Reserved1E;
    431   UINT32      Reserved1F;
    432   UINT32      Reserved20;
    433   UINT32      Reserved21;
    434   UINT32      Reserved22;
    435   UINT8       Reserved23;
    436   UINT8       BatteryChargingSolution;           // 761 0-non ULPMC 1-ULPMC
    437 
    438   //
    439   //101 bytes
    440   //
    441   UINT8       NFCnSelect;                        // 762 NFCx Select 1: NFC1    2:NFC2
    442   UINT8       LpssSccMode;                       // 763 EMMC device 0-ACPI mode, 1-PCI mode
    443 
    444   UINT32      TPMAddress;                        // 764
    445   UINT32      TPMLength;                         // 768
    446 
    447   UINT8       I2CTouchAddress;                   // 772 I2C touch address, 0x4B:RVP   0x4A:FFRD
    448   UINT8       IdleReserve;                       // 773  0 - disabled 1 - enabled
    449   UINT8       SDIOMode;                          // 774  3 - Default  2 - DDR50
    450   UINT8       emmcVersion;                       // 775  0 - 4.41 1 - 4.5
    451   UINT32      BmBound;                           // 776 BM Bound
    452   UINT8       FsaStatus;                         // 780 0 - Fsa is off, 1- Fsa is on
    453 
    454   //
    455   // Board Id
    456   // This field is for the ASL code to know whether this board is Baylake or Bayley Bay etc
    457   //
    458   UINT8       BoardID;                           //  781
    459   UINT8       FabID;                             // 782
    460   UINT8       OtgMode;                           // 783 0- OTG disable 1- OTG PCI mode
    461   UINT8       Stepping;                          //  784 Stepping
    462   UINT8       WittEnable;                        // 785 WITT eanble 0 - disable 1 - enable
    463 
    464   UINT8       SocStepping;                       // 786 Soc Stepping infomation
    465   UINT8       AmbientTripPointChange;            // 787 DPTF: Controls whether _ATI changes other participant's trip point(enabled/disabled)
    466   UINT8       UtsEnable;                         // 788 Uart Test eanble 0 - disable 1 - enable
    467   UINT8     DptfReserve;       // 789
    468 
    469   UINT8       SarEnable;                          // 790
    470   UINT8       PssDeveice;                        // 791 PSS Deveice: 0 - None, 1 - Monzax 2K, 2 - Monzax 8K
    471   UINT8       EDPV;                              // 792 Check for eDP display device
    472   UINT32      DIDX;                              // 793 Device ID for eDP device
    473   UINT8       MicrosoftIoT;                      // (794)JP1 pins are for Microsoft IoT project.
    474   UINT8       RtcBattery;                        // (795) The Flag of RTC Battery Present.
    475   UINT8       LpeAudioReportedByDSDT;            // (796)
    476 } EFI_GLOBAL_NVS_AREA;
    477 #pragma pack ()
    478 
    479 //
    480 // Global NVS Area Protocol
    481 //
    482 typedef struct _EFI_GLOBAL_NVS_AREA_PROTOCOL {
    483   EFI_GLOBAL_NVS_AREA     *Area;
    484 } EFI_GLOBAL_NVS_AREA_PROTOCOL;
    485 
    486 #endif
    487 
    488