ArmVirtPkg: QemuFwCfgToPcdDxe: set SMBIOS entry point version dynamically

[mirror_edk2.git] / ArmVirtPkg / QemuFwCfgToPcdDxe / QemuFwCfgToPcd.c

/** @file\r
*  An "early" DXE driver that parses well-known fw-cfg files into dynamic PCDs\r
*  that control other (universal) DXE drivers.\r
*\r
*  Copyright (C) 2015, Red Hat, Inc.\r
*  Copyright (c) 2014, Linaro Ltd. All rights reserved.<BR>\r
*\r
*  This program and the accompanying materials are licensed and made available\r
*  under the terms and conditions of the BSD License which accompanies this\r
*  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\r
*  IMPLIED.\r
*\r
**/\r
\r
#include <Uefi/UefiBaseType.h>\r
#include <Uefi/UefiSpec.h>\r
\r
#include <IndustryStandard/SmBios.h>\r
\r
#include <Library/BaseMemoryLib.h>\r
#include <Library/DebugLib.h>\r
#include <Library/PcdLib.h>\r
#include <Library/QemuFwCfgLib.h>\r
\r
\r
/**\r
  Set the SMBIOS entry point version for the generic SmbiosDxe driver.\r
**/\r
STATIC\r
VOID\r
SmbiosVersionInitialization (\r
  VOID\r
  )\r
{\r
  FIRMWARE_CONFIG_ITEM     Anchor;\r
  UINTN                    AnchorSize;\r
  SMBIOS_TABLE_ENTRY_POINT QemuAnchor;\r
  UINT16                   SmbiosVersion;\r
\r
  if (RETURN_ERROR (QemuFwCfgFindFile ("etc/smbios/smbios-anchor", &Anchor,\r
                      &AnchorSize)) ||\r
      AnchorSize != sizeof QemuAnchor) {\r
    return;\r
  }\r
\r
  QemuFwCfgSelectItem (Anchor);\r
  QemuFwCfgReadBytes (AnchorSize, &QemuAnchor);\r
  if (CompareMem (QemuAnchor.AnchorString, "_SM_", 4) != 0 ||\r
      CompareMem (QemuAnchor.IntermediateAnchorString, "_DMI_", 5) != 0) {\r
    return;\r
  }\r
\r
  SmbiosVersion = (UINT16)(QemuAnchor.MajorVersion << 8 |\r
                           QemuAnchor.MinorVersion);\r
  DEBUG ((EFI_D_INFO, "%a: SMBIOS version from QEMU: 0x%04x\n", __FUNCTION__,\r
    SmbiosVersion));\r
  PcdSet16 (PcdSmbiosVersion, SmbiosVersion);\r
}\r
\r
EFI_STATUS\r
EFIAPI\r
ParseQemuFwCfgToPcd (\r
  IN EFI_HANDLE       ImageHandle,\r
  IN EFI_SYSTEM_TABLE *SystemTable\r
  )\r
{\r
  SmbiosVersionInitialization ();\r
  return EFI_SUCCESS;\r
}\r