EdkCompatibilityPkg/Foundation/Cpu/Pentium/CpuIA32Lib/EfiCpuVersion.c

   1 /*++
   2
   3 Copyright (c) 2004 - 2006, Intel Corporation. All rights reserved.<BR>
   4 This program and the accompanying materials
   5 are licensed and made available under the terms and conditions of the BSD License
   6 which accompanies this distribution.  The full text of the license may be found at
   7 http://opensource.org/licenses/bsd-license.php
   8
   9 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  10 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  11
  12 Module Name:
  13
  14   EfiCpuVersion.c
  15
  16 Abstract:
  17
  18   Provide cpu version extract considering extended family & model ID.
  19 --*/
  20
  21 #include "CpuIA32.h"
  22
  23 VOID
  24 EfiCpuVersion (
  25   IN  OUT UINT16  *FamilyId,    OPTIONAL
  26   IN  OUT UINT8   *Model,       OPTIONAL
  27   IN  OUT UINT8   *SteppingId,  OPTIONAL
  28   IN  OUT UINT8   *Processor    OPTIONAL
  29   )
  30 /*++
  31
  32 Routine Description:
  33   Extract CPU detail version infomation
  34
  35 Arguments:
  36   FamilyId   - FamilyId, including ExtendedFamilyId
  37   Model      - Model, including ExtendedModel
  38   SteppingId - SteppingId
  39   Processor  - Processor
  40
  41 --*/
  42 {
  43   EFI_CPUID_REGISTER Register;
  44   UINT8              TempFamilyId;
  45
  46   EfiCpuid (EFI_CPUID_VERSION_INFO, &Register);
  47
  48   if (SteppingId != NULL) {
  49     *SteppingId = (UINT8) (Register.RegEax & 0xF);
  50   }
  51
  52   if (Processor != NULL) {
  53     *Processor = (UINT8) ((Register.RegEax >> 12) & 0x3);
  54   }
  55
  56   if (Model != NULL || FamilyId != NULL) {
  57     TempFamilyId = (UINT8) ((Register.RegEax >> 8) & 0xF);
  58
  59     if (Model != NULL) {
  60       *Model = (UINT8) ((Register.RegEax >> 4) & 0xF);
  61       if (TempFamilyId == 0x6 || TempFamilyId == 0xF) {
  62         *Model = (UINT8) (*Model  | ((Register.RegEax >> 12) & 0xF0));
  63       }
  64     }
  65
  66     if (FamilyId != NULL) {
  67       *FamilyId = TempFamilyId;
  68       if (TempFamilyId == 0xF) {
  69         *FamilyId = (UINT8 ) (*FamilyId + (UINT16) ((Register.RegEax >> 20) & 0xFF));
  70       }
  71     }
  72   }
  73 }