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 EFIAPI
EfiCpuVersion(IN OUT UINT16 * FamilyId,OPTIONAL IN OUT UINT8 * Model,OPTIONAL IN OUT UINT8 * SteppingId,OPTIONAL IN OUT UINT8 * Processor OPTIONAL)25 EfiCpuVersion (
26 IN OUT UINT16 *FamilyId, OPTIONAL
27 IN OUT UINT8 *Model, OPTIONAL
28 IN OUT UINT8 *SteppingId, OPTIONAL
29 IN OUT UINT8 *Processor OPTIONAL
30 )
31 /*++
32
33 Routine Description:
34 Extract CPU detail version infomation
35
36 Arguments:
37 FamilyId - FamilyId, including ExtendedFamilyId
38 Model - Model, including ExtendedModel
39 SteppingId - SteppingId
40 Processor - Processor
41
42 --*/
43 {
44 EFI_CPUID_REGISTER Register;
45 UINT8 TempFamilyId;
46
47 EfiCpuid (EFI_CPUID_VERSION_INFO, &Register);
48
49 if (SteppingId != NULL) {
50 *SteppingId = (UINT8) (Register.RegEax & 0xF);
51 }
52
53 if (Processor != NULL) {
54 *Processor = (UINT8) ((Register.RegEax >> 12) & 0x3);
55 }
56
57 if (Model != NULL || FamilyId != NULL) {
58 TempFamilyId = (UINT8) ((Register.RegEax >> 8) & 0xF);
59
60 if (Model != NULL) {
61 *Model = (UINT8) ((Register.RegEax >> 4) & 0xF);
62 if (TempFamilyId == 0x6 || TempFamilyId == 0xF) {
63 *Model = (UINT8) (*Model | ((Register.RegEax >> 12) & 0xF0));
64 }
65 }
66
67 if (FamilyId != NULL) {
68 *FamilyId = TempFamilyId;
69 if (TempFamilyId == 0xF) {
70 *FamilyId = (UINT8 ) (*FamilyId + (UINT16) ((Register.RegEax >> 20) & 0xFF));
71 }
72 }
73 }
74 }
75