MdeModulePkg/Library/VarCheckHiiLib/VarCheckHiiGenFromHii.c

/** @file
  Var Check Hii generation from Hii Database.

Copyright (c) 2015, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent

**/

#include "VarCheckHiiGen.h"

/**
  Generate from Hii Database.

**/
VOID
VarCheckHiiGenFromHiiDatabase (
  VOID
  )
{
  EFI_STATUS                 Status;
  UINTN                      BufferSize;
  VOID                       *Buffer;
  EFI_PHYSICAL_ADDRESS       BufferAddress;
  EFI_HII_DATABASE_PROTOCOL  *HiiDatabase;

  //
  // Locate HII Database protocol
  //
  Status = gBS->LocateProtocol (&gEfiHiiDatabaseProtocolGuid, NULL, (VOID **)&HiiDatabase);
  if (EFI_ERROR (Status)) {
    return;
  }

  //
  // Call first time with zero buffer length.
  // Should fail with EFI_BUFFER_TOO_SMALL.
  //
  BufferSize = 0;
  Buffer     = NULL;
  Status     = HiiDatabase->ExportPackageLists (HiiDatabase, 0, &BufferSize, Buffer);
  if (Status == EFI_BUFFER_TOO_SMALL) {
    //
    // Allocate buffer to hold the HII Database.
    //
    Status = gBS->AllocatePages (AllocateAnyPages, EfiBootServicesData, EFI_SIZE_TO_PAGES (BufferSize), &BufferAddress);
    ASSERT_EFI_ERROR (Status);
    Buffer = (VOID *)(UINTN)BufferAddress;

    //
    // Export HII Database into the buffer.
    //
    Status = HiiDatabase->ExportPackageLists (HiiDatabase, 0, &BufferSize, Buffer);
    ASSERT_EFI_ERROR (Status);

    DEBUG ((DEBUG_INFO, "VarCheckHiiGenDxeFromHii - HII Database exported at 0x%x, size = 0x%x\n", Buffer, BufferSize));

 #ifdef DUMP_HII_DATA
    DEBUG_CODE (
      DumpHiiDatabase (Buffer, BufferSize);
      );
 #endif

    VarCheckParseHiiDatabase (Buffer, BufferSize);

    gBS->FreePages (BufferAddress, EFI_SIZE_TO_PAGES (BufferSize));
  }
}