3cbfba02fe
https://svn.code.sf.net/p/edk2/code/trunk/edk2/, which are for MinnowBoard MAX open source project. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: David Wei <david.wei@intel.com> Reviewed-by: Mike Wu <mike.wu@intel.com> Reviewed-by: Hot Tian <hot.tian@intel.com> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16599 6f19259b-4bc3-4df7-8a09-765794883524
76 lines
2.3 KiB
C
76 lines
2.3 KiB
C
/** @file
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Copyright (c) 2004 - 2014, Intel Corporation. All rights reserved.<BR>
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This program and the accompanying materials are licensed and made available under
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the terms and conditions of the BSD License that accompanies this distribution.
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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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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 IMPLIED.
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Module Name:
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EfiCpuVersion.c
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Abstract:
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Provide cpu version extract considering extended family & model ID.
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--*/
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#include <Library/CpuIA32.h>
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/**
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Extract CPU detail version infomation
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@param FamilyId FamilyId, including ExtendedFamilyId
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@param Model Model, including ExtendedModel
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@param SteppingId SteppingId
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@param Processor Processor
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**/
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VOID
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EFIAPI
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EfiCpuVersion (
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IN OUT UINT16 *FamilyId, OPTIONAL
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IN OUT UINT8 *Model, OPTIONAL
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IN OUT UINT8 *SteppingId, OPTIONAL
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IN OUT UINT8 *Processor OPTIONAL
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)
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{
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EFI_CPUID_REGISTER Register;
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UINT8 TempFamilyId;
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EfiCpuid (EFI_CPUID_VERSION_INFO, &Register);
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if (SteppingId != NULL) {
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*SteppingId = (UINT8) (Register.RegEax & 0xF);
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}
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if (Processor != NULL) {
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*Processor = (UINT8) ((Register.RegEax >> 12) & 0x3);
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}
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if (Model != NULL || FamilyId != NULL) {
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TempFamilyId = (UINT8) ((Register.RegEax >> 8) & 0xF);
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if (Model != NULL) {
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*Model = (UINT8) ((Register.RegEax >> 4) & 0xF);
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if (TempFamilyId == 0x6 || TempFamilyId == 0xF) {
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*Model = (UINT8) (*Model | ((Register.RegEax >> 12) & 0xF0));
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}
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}
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if (FamilyId != NULL) {
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*FamilyId = TempFamilyId;
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if (TempFamilyId == 0xF) {
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*FamilyId = (UINT8 ) (*FamilyId + (UINT16) ((Register.RegEax >> 20) & 0xFF));
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}
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}
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}
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}
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