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/** @file
Copyright (c) 2004 - 2014, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials are licensed and made available under
the terms and conditions of the BSD License that 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 <Library/CpuIA32.h>
/**
Extract CPU detail version infomation
@param FamilyId FamilyId, including ExtendedFamilyId
@param Model Model, including ExtendedModel
@param SteppingId SteppingId
@param Processor Processor
**/
VOID
EFIAPI
EfiCpuVersion (
IN OUT UINT16 *FamilyId, OPTIONAL
IN OUT UINT8 *Model, OPTIONAL
IN OUT UINT8 *SteppingId, OPTIONAL
IN OUT UINT8 *Processor OPTIONAL
)
{
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 = (UINT8) (*Model | ((Register.RegEax >> 12) & 0xF0));
}
}
if (FamilyId != NULL) {
*FamilyId = TempFamilyId;
if (TempFamilyId == 0xF) {
*FamilyId = (UINT8 ) (*FamilyId + (UINT16) ((Register.RegEax >> 20) & 0xFF));
}
}
}
}
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