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/*++
Copyright (c) 2004 - 2006, Intel Corporation
All rights reserved. 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.
Module Name:
EfiCpuVersion.c
Abstract:
Provide cpu version extract considering extended family & model ID.
--*/
#include "CpuIA32.h"
VOID
EfiCpuVersion (
IN OUT UINT16 *FamilyId, OPTIONAL
IN OUT UINT8 *Model, OPTIONAL
IN OUT UINT8 *SteppingId, OPTIONAL
IN OUT UINT8 *Processor OPTIONAL
)
/*++
Routine Description:
Extract CPU detail version infomation
Arguments:
FamilyId - FamilyId, including ExtendedFamilyId
Model - Model, including ExtendedModel
SteppingId - SteppingId
Processor - Processor
--*/
{
EFI_CPUID_REGISTER Register;
UINT8 TempFamilyId;
EfiCpuid (EFI_CPUID_VERSION_INFO, &Register);
if (SteppingId != NULL) {
*SteppingId = (UINT8) (Register.RegEax & 0xF);
}
if (Processor != NULL) {
*Processor = (UINT8) ((Register.RegEax >> 12) & 0x3);
}
if (Model != NULL || FamilyId != NULL) {
TempFamilyId = (UINT8) ((Register.RegEax >> 8) & 0xF);
if (Model != NULL) {
*Model = (UINT8) ((Register.RegEax >> 4) & 0xF);
if (TempFamilyId == 0x6 || TempFamilyId == 0xF) {
*Model |= (Register.RegEax >> 12) & 0xF0;
}
}
if (FamilyId != NULL) {
*FamilyId = TempFamilyId;
if (TempFamilyId == 0xF) {
*FamilyId = *FamilyId + (UINT16) ((Register.RegEax >> 20) & 0xFF);
}
}
}
}
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