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/** @file
This driver installs SMBIOS information for OVMF
Copyright (c) 2011, Bei Guan <gbtju85@gmail.com>
Copyright (c) 2011 - 2015, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <IndustryStandard/SmBios.h> // SMBIOS_TABLE_TYPE0
#include <Library/BaseLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/DebugLib.h> // ASSERT_EFI_ERROR()
#include <Library/MemoryAllocationLib.h>
#include <Library/PcdLib.h>
#include <Library/UefiBootServicesTableLib.h> // gBS
#include <Protocol/Smbios.h> // EFI_SMBIOS_PROTOCOL
#include "SmbiosPlatformDxe.h"
STATIC CONST SMBIOS_TABLE_TYPE0 mOvmfDefaultType0 = {
// SMBIOS_STRUCTURE Hdr
{
EFI_SMBIOS_TYPE_BIOS_INFORMATION, // UINT8 Type
sizeof (SMBIOS_TABLE_TYPE0), // UINT8 Length
},
1, // SMBIOS_TABLE_STRING Vendor
2, // SMBIOS_TABLE_STRING BiosVersion
0xE800, // UINT16 BiosSegment
3, // SMBIOS_TABLE_STRING BiosReleaseDate
0, // UINT8 BiosSize
{ // MISC_BIOS_CHARACTERISTICS BiosCharacteristics
0, // Reserved :2
0, // Unknown :1
1, // BiosCharacteristicsNotSupported :1
// Remaining BiosCharacteristics bits left unset :60
},
{ // BIOSCharacteristicsExtensionBytes[2]
0, // BiosReserved
0x1C // SystemReserved = VirtualMachineSupported |
// UefiSpecificationSupported |
// TargetContentDistributionEnabled
},
0, // UINT8 SystemBiosMajorRelease
0, // UINT8 SystemBiosMinorRelease
0xFF, // UINT8 EmbeddedControllerFirmwareMajorRelease
0xFF // UINT8 EmbeddedControllerFirmwareMinorRelease
};
/**
Get SMBIOS record length.
@param SmbiosTable SMBIOS pointer.
**/
UINTN
SmbiosTableLength (
IN SMBIOS_STRUCTURE_POINTER SmbiosTable
)
{
CHAR8 *AChar;
UINTN Length;
AChar = (CHAR8 *)(SmbiosTable.Raw + SmbiosTable.Hdr->Length);
//
// Each structure shall be terminated by a double-null (SMBIOS spec.7.1)
//
while ((*AChar != 0) || (*(AChar + 1) != 0)) {
AChar++;
}
Length = ((UINTN)AChar - (UINTN)SmbiosTable.Raw + 2);
return Length;
}
/**
Install all structures from the given SMBIOS structures block
@param TableAddress SMBIOS tables starting address
**/
EFI_STATUS
InstallAllStructures (
IN UINT8 *TableAddress
)
{
EFI_SMBIOS_PROTOCOL *Smbios;
EFI_STATUS Status;
SMBIOS_STRUCTURE_POINTER SmbiosTable;
EFI_SMBIOS_HANDLE SmbiosHandle;
BOOLEAN NeedSmbiosType0;
//
// Find the SMBIOS protocol
//
Status = gBS->LocateProtocol (
&gEfiSmbiosProtocolGuid,
NULL,
(VOID **)&Smbios
);
if (EFI_ERROR (Status)) {
return Status;
}
SmbiosTable.Raw = TableAddress;
if (SmbiosTable.Raw == NULL) {
return EFI_INVALID_PARAMETER;
}
NeedSmbiosType0 = TRUE;
while (SmbiosTable.Hdr->Type != 127) {
//
// Log the SMBIOS data for this structure
//
SmbiosHandle = SmbiosTable.Hdr->Handle;
Status = Smbios->Add (
Smbios,
NULL,
&SmbiosHandle,
(EFI_SMBIOS_TABLE_HEADER *)SmbiosTable.Raw
);
ASSERT_EFI_ERROR (Status);
if (SmbiosTable.Hdr->Type == 0) {
NeedSmbiosType0 = FALSE;
}
//
// Get the next structure address
//
SmbiosTable.Raw = (UINT8 *)(SmbiosTable.Raw + SmbiosTableLength (SmbiosTable));
}
if (NeedSmbiosType0) {
//
// Add OVMF default Type 0 (BIOS Information) table
//
CHAR16 *VendStr, *VersStr, *DateStr;
UINTN VendLen, VersLen, DateLen;
CHAR8 *Type0;
VendStr = (CHAR16 *)FixedPcdGetPtr (PcdFirmwareVendor);
VendLen = StrLen (VendStr);
if (VendLen < 3) {
VendStr = L"unknown";
VendLen = StrLen (VendStr);
}
VersStr = (CHAR16 *)FixedPcdGetPtr (PcdFirmwareVersionString);
VersLen = StrLen (VersStr);
if (VersLen < 3) {
VersStr = L"unknown";
VersLen = StrLen (VersStr);
}
DateStr = (CHAR16 *)FixedPcdGetPtr (PcdFirmwareReleaseDateString);
DateLen = StrLen (DateStr);
if (DateLen < 3) {
DateStr = L"2/2/2022";
DateLen = StrLen (DateStr);
}
DEBUG ((DEBUG_INFO, "FirmwareVendor: \"%s\" (%d chars)\n", VendStr, VendLen));
DEBUG ((DEBUG_INFO, "FirmwareVersionString: \"%s\" (%d chars)\n", VersStr, VersLen));
DEBUG ((DEBUG_INFO, "FirmwareReleaseDateString: \"%s\" (%d chars)\n", DateStr, DateLen));
Type0 = AllocateZeroPool (sizeof (mOvmfDefaultType0) + VendLen + VersLen + DateLen + 4);
if (Type0 == NULL) {
return EFI_OUT_OF_RESOURCES;
}
CopyMem (Type0, &mOvmfDefaultType0, sizeof (mOvmfDefaultType0));
UnicodeStrToAsciiStrS (VendStr, Type0 + sizeof (mOvmfDefaultType0), VendLen + 1);
UnicodeStrToAsciiStrS (VersStr, Type0 + sizeof (mOvmfDefaultType0) + VendLen + 1, VersLen + 1);
UnicodeStrToAsciiStrS (DateStr, Type0 + sizeof (mOvmfDefaultType0) + VendLen + VersLen + 2, DateLen + 1);
SmbiosHandle = SMBIOS_HANDLE_PI_RESERVED;
Status = Smbios->Add (
Smbios,
NULL,
&SmbiosHandle,
(EFI_SMBIOS_TABLE_HEADER *)Type0
);
ASSERT_EFI_ERROR (Status);
FreePool (Type0);
}
return EFI_SUCCESS;
}
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