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