[edk2-devel] 回复: [Patch 1/1] MdePkg/Library/BaseCpuLibNull: Add missing X86 specific services

["gaoliming via groups.io" <gaoliming=byosoft.com.cn@groups.io>]

Reviewed-by: Liming Gao <gaoliming@byosoft.com.cn>

> -----邮件原件-----
> 发件人: Laszlo Ersek <lersek@redhat.com>
> 发送时间: 2024年1月24日 21:00
> 收件人: Michael D Kinney <michael.d.kinney@intel.com>;
> devel@edk2.groups.io
> 抄送: Liming Gao <gaoliming@byosoft.com.cn>; Zhiguang Liu
> <zhiguang.liu@intel.com>; Qing Huang <qing.huang@intel.com>
> 主题: Re: [Patch 1/1] MdePkg/Library/BaseCpuLibNull: Add missing X86
> specific services
> 
> On 1/23/24 23:52, Michael D Kinney wrote:
> > * Add InitializeFloatingPointUnits() to x86 specific file
> > * Add GetCpuFamilyModel() to x86 specific file
> > * Add GetCpuSteppingId() to x86 specific file
> > * Move StandardSignatureIsAuthenticAMD() to x86 specific file.
> > * Add CpuLib library class include to all C files.
> >
> > Cc: Liming Gao <gaoliming@byosoft.com.cn>
> > Cc: Zhiguang Liu <zhiguang.liu@intel.com>
> > Cc: Laszlo Ersek <lersek@redhat.com>
> > Cc: Qing Huang <qing.huang@intel.com>
> > Signed-off-by: Michael D Kinney <michael.d.kinney@intel.com>
> > ---
> >  .../Library/BaseCpuLibNull/BaseCpuLibNull.c   | 17 +----
> >  .../Library/BaseCpuLibNull/BaseCpuLibNull.inf |  3 +
> >  .../BaseCpuLibNull/X86BaseCpuLibNull.c        | 64
> +++++++++++++++++++
> >  3 files changed, 69 insertions(+), 15 deletions(-)
> >  create mode 100644
> MdePkg/Library/BaseCpuLibNull/X86BaseCpuLibNull.c
> >
> > diff --git a/MdePkg/Library/BaseCpuLibNull/BaseCpuLibNull.c
> b/MdePkg/Library/BaseCpuLibNull/BaseCpuLibNull.c
> > index 3542cf6921f7..0080022b94ef 100644
> > --- a/MdePkg/Library/BaseCpuLibNull/BaseCpuLibNull.c
> > +++ b/MdePkg/Library/BaseCpuLibNull/BaseCpuLibNull.c
> > @@ -6,6 +6,8 @@
> >
> >  **/
> >
> > +#include <Library/CpuLib.h>
> > +
> >  /**
> >    Places the CPU in a sleep state until an interrupt is received.
> >
> > @@ -35,18 +37,3 @@ CpuFlushTlb (
> >    )
> >  {
> >  }
> > -
> > -/**
> > -  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 FALSE;
> > -}
> > diff --git a/MdePkg/Library/BaseCpuLibNull/BaseCpuLibNull.inf
> b/MdePkg/Library/BaseCpuLibNull/BaseCpuLibNull.inf
> > index a9e8399038a6..9f20d6833f56 100644
> > --- a/MdePkg/Library/BaseCpuLibNull/BaseCpuLibNull.inf
> > +++ b/MdePkg/Library/BaseCpuLibNull/BaseCpuLibNull.inf
> > @@ -22,5 +22,8 @@ [Defines]
> >  [Sources]
> >    BaseCpuLibNull.c
> >
> > +[Sources.IA32, Sources.X64]
> > +  X86BaseCpuLibNull.c
> > +
> >  [Packages]
> >    MdePkg/MdePkg.dec
> > diff --git a/MdePkg/Library/BaseCpuLibNull/X86BaseCpuLibNull.c
> b/MdePkg/Library/BaseCpuLibNull/X86BaseCpuLibNull.c
> > new file mode 100644
> > index 000000000000..4469bcc767cf
> > --- /dev/null
> > +++ b/MdePkg/Library/BaseCpuLibNull/X86BaseCpuLibNull.c
> > @@ -0,0 +1,64 @@
> > +/** @file
> > +  Null instance of CPU Library for IA32/X64 specific services.
> > +
> > +  Copyright (c) 2024, Intel Corporation. All rights reserved.<BR>
> > +  SPDX-License-Identifier: BSD-2-Clause-Patent
> > +
> > +**/
> > +
> > +#include <Library/CpuLib.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 FALSE;
> > +}
> > +
> > +/**
> > +  Return the 32bit CPU family and model value.
> > +  @return CPUID[01h].EAX with Processor Type and Stepping ID cleared.
> > +**/
> > +UINT32
> > +EFIAPI
> > +GetCpuFamilyModel (
> > +  VOID
> > +  )
> > +{
> > +  return 0;
> > +}
> > +
> > +/**
> > +  Return the CPU stepping ID.
> > +  @return CPU stepping ID value in CPUID[01h].EAX.
> > +**/
> > +UINT8
> > +EFIAPI
> > +GetCpuSteppingId (
> > +  VOID
> > +  )
> > +{
> > +  return 0;
> > +}
> 
> Reviewed-by: Laszlo Ersek <lersek@redhat.com>





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