1 /** @file 2 3 Copyright (c) 2004 - 2014, Intel Corporation. All rights reserved.<BR> 4 5 This program and the accompanying materials are licensed and made available under 7 the terms and conditions of the BSD License that accompanies this distribution. 9 The full text of the license may be found at 11 http://opensource.org/licenses/bsd-license.php. 13 15 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 17 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 19 21 23 Module Name: 24 25 26 EfiCpuVersion.c 27 28 Abstract: 29 30 Provide cpu version extract considering extended family & model ID. 31 --*/ 32 33 #include <Library/CpuIA32.h> 34 35 /** 36 Extract CPU detail version infomation 37 38 @param FamilyId FamilyId, including ExtendedFamilyId 39 @param Model Model, including ExtendedModel 40 @param SteppingId SteppingId 41 @param Processor Processor 42 43 **/ 44 VOID 45 EFIAPI 46 EfiCpuVersion ( 47 IN OUT UINT16 *FamilyId, OPTIONAL 48 IN OUT UINT8 *Model, OPTIONAL 49 IN OUT UINT8 *SteppingId, OPTIONAL 50 IN OUT UINT8 *Processor OPTIONAL 51 ) 52 53 { 54 EFI_CPUID_REGISTER Register; 55 UINT8 TempFamilyId; 56 57 EfiCpuid (EFI_CPUID_VERSION_INFO, &Register); 58 59 if (SteppingId != NULL) { 60 *SteppingId = (UINT8) (Register.RegEax & 0xF); 61 } 62 63 if (Processor != NULL) { 64 *Processor = (UINT8) ((Register.RegEax >> 12) & 0x3); 65 } 66 67 if (Model != NULL || FamilyId != NULL) { 68 TempFamilyId = (UINT8) ((Register.RegEax >> 8) & 0xF); 69 70 if (Model != NULL) { 71 *Model = (UINT8) ((Register.RegEax >> 4) & 0xF); 72 if (TempFamilyId == 0x6 || TempFamilyId == 0xF) { 73 *Model = (UINT8) (*Model | ((Register.RegEax >> 12) & 0xF0)); 74 } 75 } 76 77 if (FamilyId != NULL) { 78 *FamilyId = TempFamilyId; 79 if (TempFamilyId == 0xF) { 80 *FamilyId = (UINT8 ) (*FamilyId + (UINT16) ((Register.RegEax >> 20) & 0xFF)); 81 } 82 } 83 } 84 } 85
