Curle
d588e232c4
This branch has been dedicated to purely the UEFI bootloader. As such, all other code has been removed. This code can be compiled with Visual Studio, gcc or llvm.
136 lines
3.5 KiB
C
136 lines
3.5 KiB
C
/*++
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Copyright (c) 2000 Intel Corporation
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Module Name:
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Smbios.c
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Abstract:
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Lib fucntions for SMBIOS. Used to get system serial number and GUID
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Revision History
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--*/
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#include "lib.h"
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/*
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* We convert 32 bit values to pointers. In 64 bit mode the compiler will issue a
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* warning stating that the value is too small for the pointer:
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* "warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]"
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* we can safely ignore them here.
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*/
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#ifdef __GNUC__
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#pragma GCC diagnostic ignored "-Wint-to-pointer-cast"
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#endif
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EFI_STATUS
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LibGetSmbiosSystemGuidAndSerialNumber (
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IN EFI_GUID *SystemGuid,
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OUT CHAR8 **SystemSerialNumber
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)
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{
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EFI_STATUS Status;
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SMBIOS_STRUCTURE_TABLE *SmbiosTable;
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SMBIOS_STRUCTURE_POINTER Smbios;
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SMBIOS_STRUCTURE_POINTER SmbiosEnd;
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UINT16 Index;
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Status = LibGetSystemConfigurationTable(&SMBIOSTableGuid, (VOID**)&SmbiosTable);
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if (EFI_ERROR(Status)) {
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return EFI_NOT_FOUND;
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}
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Smbios.Hdr = (SMBIOS_HEADER *)SmbiosTable->TableAddress;
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SmbiosEnd.Raw = (UINT8 *)(SmbiosTable->TableAddress + SmbiosTable->TableLength);
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for (Index = 0; Index < SmbiosTable->TableLength ; Index++) {
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if (Smbios.Hdr->Type == 1) {
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if (Smbios.Hdr->Length < 0x19) {
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//
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// Older version did not support Guid and Serial number
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//
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continue;
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}
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//
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// SMBIOS tables are byte packed so we need to do a byte copy to
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// prevend alignment faults on IA-64.
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CopyMem (SystemGuid, &Smbios.Type1->Uuid, sizeof(EFI_GUID));
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*SystemSerialNumber = LibGetSmbiosString(&Smbios, Smbios.Type1->SerialNumber);
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return EFI_SUCCESS;
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}
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//
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// Make Smbios point to the next record
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//
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LibGetSmbiosString (&Smbios, -1);
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if (Smbios.Raw >= SmbiosEnd.Raw) {
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//
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// SMBIOS 2.1 incorrectly stated the length of SmbiosTable as 0x1e.
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// given this we must double check against the lenght of
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/// the structure. My home PC has this bug.ruthard
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//
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return EFI_SUCCESS;
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}
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}
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return EFI_SUCCESS;
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}
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CHAR8*
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LibGetSmbiosString (
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IN SMBIOS_STRUCTURE_POINTER *Smbios,
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IN UINT16 StringNumber
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)
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/*++
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Return SMBIOS string given the string number.
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Arguments:
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Smbios - Pointer to SMBIOS structure
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StringNumber - String number to return. -1 is used to skip all strings and
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point to the next SMBIOS structure.
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Returns:
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Pointer to string, or pointer to next SMBIOS strcuture if StringNumber == -1
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--*/
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{
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UINT16 Index;
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CHAR8 *String;
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//
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// Skip over formatted section
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//
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String = (CHAR8 *)(Smbios->Raw + Smbios->Hdr->Length);
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//
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// Look through unformated section
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//
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for (Index = 1; Index <= StringNumber; Index++) {
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if (StringNumber == Index) {
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return String;
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}
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//
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// Skip string
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//
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for (; *String != 0; String++);
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String++;
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if (*String == 0) {
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//
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// If double NULL then we are done.
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// Retrun pointer to next structure in Smbios.
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// if you pass in a -1 you will always get here
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//
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Smbios->Raw = (UINT8 *)++String;
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return NULL;
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}
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}
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return NULL;
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}
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