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/** @file
Public header file for UEFI CPU library class.
This library class defines some routines that are generic for IA32 family CPU
to be UEFI specification compliant.
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
**/
#ifndef __UEFI_CPU_LIB_H__
#define __UEFI_CPU_LIB_H__
/**
Initializes floating point units for requirement of UEFI specification.
This function initializes floating-point control word to 0x027F (all exceptions
masked,double-precision, round-to-nearest) and multimedia-extensions control word
(if supported) to 0x1F80 (all exceptions masked, round-to-nearest, flush to zero
for masked underflow).
**/
VOID
EFIAPI
InitializeFloatingPointUnits (
VOID
);
/**
Determine if the standard CPU signature is "AuthenticAMD".
@retval TRUE The CPU signature matches.
@retval FALSE The CPU signature does not match.
**/
BOOLEAN
EFIAPI
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
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