audk/Nt32Pkg/MiscSubClassPlatformDxe/MiscBiosVendorFunction.c

/** @file
  BIOS vendor information boot time changes.
  Misc. subclass type 2.
  SMBIOS type 0.
  
Copyright (c) 2009 - 2011, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent

**/

#include "MiscSubclassDriver.h"

/**
  This function returns the value & exponent to Base2 for a given
  Hex value. This is used to calculate the BiosPhysicalDeviceSize.

  @param Value                      The hex value which is to be converted into value-exponent form
  @param Exponent                   The exponent out of the conversion

  @retval EFI_SUCCESS               All parameters were valid and *Value & *Exponent have been set.
  @retval EFI_INVALID_PARAMETER     Invalid parameter was found.
  
**/
EFI_STATUS  
GetValueExponentBase2(
  IN OUT UINTN        *Value,
  OUT    UINTN        *Exponent
  )
{
  if ((Value == NULL) || (Exponent == NULL)) {
    return EFI_INVALID_PARAMETER;
  }
  
  while ((*Value % 2) == 0) {
    *Value=*Value/2;
    (*Exponent)++;
  }

  return EFI_SUCCESS;
}

/**
  Field Filling Function. Transform an EFI_EXP_BASE2_DATA to a byte, with '64k'
  as the unit.

  @param  Base2Data              Pointer to Base2_Data

  @retval EFI_SUCCESS            Transform successfully.       
  @retval EFI_INVALID_PARAMETER  Invalid parameter was found.    

**/
UINT16
Base2ToByteWith64KUnit (
  IN      EFI_EXP_BASE2_DATA  *Base2Data
  )
{  
  UINT16              Value;
  UINT16              Exponent;

  Value     = Base2Data->Value;
  Exponent  = Base2Data->Exponent;
  Exponent -= 16;
  Value <<= Exponent;

  return Value;
}


/**
  This function makes boot time changes to the contents of the
  MiscBiosVendor (Type 0).

  @param  RecordData                 Pointer to copy of RecordData from the Data Table.

  @retval EFI_SUCCESS                All parameters were valid.
  @retval EFI_UNSUPPORTED            Unexpected RecordType value.
  @retval EFI_INVALID_PARAMETER      Invalid parameter was found.

**/
MISC_SMBIOS_TABLE_FUNCTION(MiscBiosVendor)
{
  CHAR8                 *OptionalStrStart;
  UINTN                 VendorStrLen;
  UINTN                 VerStrLen;
  UINTN                 DateStrLen;
  CHAR16                *Version;
  CHAR16                *ReleaseDate;
  EFI_STATUS            Status;
  EFI_STRING            Char16String;
  STRING_REF            TokenToGet;
  STRING_REF            TokenToUpdate;
  SMBIOS_TABLE_TYPE0    *SmbiosRecord;
  EFI_SMBIOS_HANDLE     SmbiosHandle;
  EFI_MISC_BIOS_VENDOR *ForType0InputData;

  ForType0InputData        = (EFI_MISC_BIOS_VENDOR *)RecordData;

  //
  // First check for invalid parameters.
  //
  if (RecordData == NULL) {
    return EFI_INVALID_PARAMETER;
  }

  Version = (CHAR16 *) PcdGetPtr (PcdFirmwareVersionString);
  if (StrLen (Version) > 0) {     
    TokenToUpdate = STRING_TOKEN (STR_MISC_BIOS_VERSION);
    HiiSetString (mHiiHandle, TokenToUpdate, Version, NULL);
  }
  
  ReleaseDate = (CHAR16 *) PcdGetPtr (PcdFirmwareReleaseDateString);
  if (StrLen(ReleaseDate) > 0) {
    TokenToUpdate = STRING_TOKEN (STR_MISC_BIOS_RELEASE_DATE);
    HiiSetString (mHiiHandle, TokenToUpdate, ReleaseDate, NULL);
  }

  TokenToGet = STRING_TOKEN (STR_MISC_BIOS_VENDOR);
  Char16String = HiiGetPackageString(&gEfiCallerIdGuid, TokenToGet, NULL);
  VendorStrLen = StrLen(Char16String);
  if (VendorStrLen > SMBIOS_STRING_MAX_LENGTH) {
    return EFI_UNSUPPORTED;
  }

  TokenToGet = STRING_TOKEN (STR_MISC_BIOS_VERSION);
  Version = HiiGetPackageString(&gEfiCallerIdGuid, TokenToGet, NULL);
  VerStrLen = StrLen(Version);
  if (VerStrLen > SMBIOS_STRING_MAX_LENGTH) {
    return EFI_UNSUPPORTED;
  }

  TokenToGet = STRING_TOKEN (STR_MISC_BIOS_RELEASE_DATE);
  ReleaseDate = HiiGetPackageString(&gEfiCallerIdGuid, TokenToGet, NULL);
  DateStrLen = StrLen(ReleaseDate);
  if (DateStrLen > SMBIOS_STRING_MAX_LENGTH) {
    return EFI_UNSUPPORTED;
  }
  
  //
  // Two zeros following the last string.
  //
  SmbiosRecord = AllocatePool(sizeof (SMBIOS_TABLE_TYPE0) + VendorStrLen + 1 + VerStrLen + 1 + DateStrLen + 1 + 1);
  ZeroMem(SmbiosRecord, sizeof (SMBIOS_TABLE_TYPE0) + VendorStrLen + 1 + VerStrLen + 1 + DateStrLen + 1 + 1);

  SmbiosRecord->Hdr.Type = EFI_SMBIOS_TYPE_BIOS_INFORMATION;
  SmbiosRecord->Hdr.Length = sizeof (SMBIOS_TABLE_TYPE0);
  //
  // Make handle chosen by smbios protocol.add automatically.
  //
  SmbiosRecord->Hdr.Handle = 0;
  //
  // Vendor will be the 1st optional string following the formatted structure.
  //
  SmbiosRecord->Vendor = 1;  
  //
  // Version will be the 2nd optional string following the formatted structure.
  //
  SmbiosRecord->BiosVersion = 2;
  SmbiosRecord->BiosSegment = (UINT16)ForType0InputData->BiosStartingAddress;
  //
  // ReleaseDate will be the 3rd optional string following the formatted structure.
  //
  SmbiosRecord->BiosReleaseDate = 3;
  //
  // Nt32 has no PCD value to indicate BIOS Size, just fill 0 for simply.
  //
  SmbiosRecord->BiosSize = 0;
  SmbiosRecord->BiosCharacteristics = *(MISC_BIOS_CHARACTERISTICS*)(&ForType0InputData->BiosCharacteristics1);
  //
  // CharacterExtensionBytes also store in ForType0InputData->BiosCharacteristics1 later two bytes to save size.
  //
  SmbiosRecord->BIOSCharacteristicsExtensionBytes[0] = *((UINT8 *) &ForType0InputData->BiosCharacteristics1 + 4);
  SmbiosRecord->BIOSCharacteristicsExtensionBytes[1] = *((UINT8 *) &ForType0InputData->BiosCharacteristics1 + 5);

  SmbiosRecord->SystemBiosMajorRelease = ForType0InputData->BiosMajorRelease;
  SmbiosRecord->SystemBiosMinorRelease = ForType0InputData->BiosMinorRelease;
  SmbiosRecord->EmbeddedControllerFirmwareMajorRelease = ForType0InputData->BiosEmbeddedFirmwareMajorRelease;
  SmbiosRecord->EmbeddedControllerFirmwareMinorRelease = ForType0InputData->BiosEmbeddedFirmwareMinorRelease;

  OptionalStrStart = (CHAR8 *)(SmbiosRecord + 1);
  UnicodeStrToAsciiStr(Char16String, OptionalStrStart);
  UnicodeStrToAsciiStr(Version, OptionalStrStart + VendorStrLen + 1);
  UnicodeStrToAsciiStr(ReleaseDate, OptionalStrStart + VendorStrLen + 1 + VerStrLen + 1);
  //
  // Now we have got the full smbios record, call smbios protocol to add this record.
  //
  Status = AddSmbiosRecord (Smbios, &SmbiosHandle, (EFI_SMBIOS_TABLE_HEADER *) SmbiosRecord);

  FreePool(SmbiosRecord);
  return Status;
}