1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
|
/** @file
Provide Cpu version extract considering extended family & model ID.
Copyright (c) 2004 - 2015, 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
which 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.
**/
#include <Library/CpuIA32.h>
/**
Extract CPU detail version infomation
@param[in, out] FamilyId FamilyId, including ExtendedFamilyId
@param[in, out] Model Model, including ExtendedModel
@param[in, out] SteppingId SteppingId
@param[in, out] 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));
}
}
}
}
|
