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/** @file
* An "early" DXE driver that parses well-known fw-cfg files into dynamic PCDs
* that control other (universal) DXE drivers.
*
* Copyright (C) 2015, Red Hat, Inc.
* Copyright (c) 2014, Linaro Ltd. All rights reserved.<BR>
*
* This program and the accompanying materials are licensed and made available
* under the terms and conditions of the BSD License which accompanies this
* distribution. The full text of the license may be found at
* http://opensource.org/licenses/bsd-license.php
*
* THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
* WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR
* IMPLIED.
*
**/
#include <Uefi/UefiBaseType.h>
#include <Uefi/UefiSpec.h>
#include <IndustryStandard/SmBios.h>
#include <Library/BaseMemoryLib.h>
#include <Library/DebugLib.h>
#include <Library/PcdLib.h>
#include <Library/QemuFwCfgLib.h>
/**
Set the SMBIOS entry point version for the generic SmbiosDxe driver.
**/
STATIC
VOID
SmbiosVersionInitialization (
VOID
)
{
FIRMWARE_CONFIG_ITEM Anchor;
UINTN AnchorSize;
SMBIOS_TABLE_ENTRY_POINT QemuAnchor;
UINT16 SmbiosVersion;
if (RETURN_ERROR (QemuFwCfgFindFile ("etc/smbios/smbios-anchor", &Anchor,
&AnchorSize)) ||
AnchorSize != sizeof QemuAnchor) {
return;
}
QemuFwCfgSelectItem (Anchor);
QemuFwCfgReadBytes (AnchorSize, &QemuAnchor);
if (CompareMem (QemuAnchor.AnchorString, "_SM_", 4) != 0 ||
CompareMem (QemuAnchor.IntermediateAnchorString, "_DMI_", 5) != 0) {
return;
}
SmbiosVersion = (UINT16)(QemuAnchor.MajorVersion << 8 |
QemuAnchor.MinorVersion);
DEBUG ((EFI_D_INFO, "%a: SMBIOS version from QEMU: 0x%04x\n", __FUNCTION__,
SmbiosVersion));
PcdSet16 (PcdSmbiosVersion, SmbiosVersion);
}
EFI_STATUS
EFIAPI
ParseQemuFwCfgToPcd (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
SmbiosVersionInitialization ();
return EFI_SUCCESS;
}
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