tyler.durden
/
audk
mirror of https://github.com/acidanthera/audk.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

UefiCpuPkg/UefiCpuLib: Add GetCpuFamilyModel and GetCpuSteppingId 

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3698

Lots of code relies on CPU Family/Model/Stepping for different logics.

The change adds two APIs for such needs.

Signed-off-by: Ray Ni <ray.ni@intel.com>
Reviewed-by: Eric Dong <eric.dong@intel.com>
Cc: Rahul Kumar <rahul1.kumar@intel.com>
This commit is contained in:
Ni, Ray 2021-10-19 14:42:21 +08:00 committed by mergify[bot]
parent a7b35aae13
commit f826b20811
2 changed files with 65 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
UefiCpuPkg/Include/Library/UefiCpuLib.h
View File

@ -4,7 +4,7 @@
This library class defines some routines that are generic for IA32 family CPU
to be UEFI specification compliant.
Copyright (c) 2009, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2009 - 2021, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2020, AMD Inc. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
@ -43,4 +43,25 @@ StandardSignatureIsAuthenticAMD (
VOID
);
/**
Return the 32bit CPU family and model value.
@return CPUID[01h].EAX with Processor Type and Stepping ID cleared.
**/
UINT32
EFIAPI
GetCpuFamilyModel (
VOID
);
/**
Return the CPU stepping ID.
@return CPU stepping ID value in CPUID[01h].EAX.
**/
UINT8
EFIAPI
GetCpuSteppingId (
VOID
);
#endif

43
UefiCpuPkg/Library/BaseUefiCpuLib/BaseUefiCpuLib.c
View File

@ -4,6 +4,7 @@
The library routines are UEFI specification compliant.
Copyright (c) 2020, AMD Inc. All rights reserved.<BR>
Copyright (c) 2021, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
@ -36,3 +37,45 @@ StandardSignatureIsAuthenticAMD (
RegEcx == CPUID_SIGNATURE_AUTHENTIC_AMD_ECX &&
RegEdx == CPUID_SIGNATURE_AUTHENTIC_AMD_EDX);
}
/**
Return the 32bit CPU family and model value.
@return CPUID[01h].EAX with Processor Type and Stepping ID cleared.
**/
UINT32
EFIAPI
GetCpuFamilyModel (
VOID
)
{
CPUID_VERSION_INFO_EAX Eax;
AsmCpuid (CPUID_VERSION_INFO, &Eax.Uint32, NULL, NULL, NULL);
//
// Mask other fields than Family and Model.
//
Eax.Bits.SteppingId = 0;
Eax.Bits.ProcessorType = 0;
Eax.Bits.Reserved1 = 0;
Eax.Bits.Reserved2 = 0;
return Eax.Uint32;
}
/**
Return the CPU stepping ID.
@return CPU stepping ID value in CPUID[01h].EAX.
**/
UINT8
EFIAPI
GetCpuSteppingId (
VOID
)
{
CPUID_VERSION_INFO_EAX Eax;
AsmCpuid (CPUID_VERSION_INFO, &Eax.Uint32, NULL, NULL, NULL);
return (UINT8) Eax.Bits.SteppingId;
}