mirror of https://github.com/acidanthera/audk.git
66 lines
1.4 KiB
C
66 lines
1.4 KiB
C
/** @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
|