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UefiCpuPkg/UefiCpuLib: Add GetCpuFamilyModel and GetCpuSteppingId

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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
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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 This library class defines some routines that are generic for IA32 family CPU
to be UEFI specification compliant. 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> Copyright (c) 2020, AMD Inc. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent SPDX-License-Identifier: BSD-2-Clause-Patent
@ -43,4 +43,25 @@ StandardSignatureIsAuthenticAMD (
VOID 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 #endif

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

@ -4,6 +4,7 @@
The library routines are UEFI specification compliant. The library routines are UEFI specification compliant.
Copyright (c) 2020, AMD Inc. All rights reserved.<BR> 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 SPDX-License-Identifier: BSD-2-Clause-Patent
**/ **/
@ -36,3 +37,45 @@ StandardSignatureIsAuthenticAMD (
RegEcx == CPUID_SIGNATURE_AUTHENTIC_AMD_ECX && RegEcx == CPUID_SIGNATURE_AUTHENTIC_AMD_ECX &&
RegEdx == CPUID_SIGNATURE_AUTHENTIC_AMD_EDX); 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;
}