Re: [PATCH] MdePkg/SecPeiDxeTimerLibCpu: Consume UefiCpuPkg LAPIC code.

["Marvin Häuser" <Marvin.Haeuser@outlook.com>]

Hey Jeff,

That would definitely fix the compilation issue.
Do I see it right that for 32-bit platforms, it's just ApicBase and for 64-bit platforms, it's ApicBase and ApicBaseHi?
If yes, maybe ~(UINTN)0xFFF should be used to play safe?

Thanks,
Marvin.

> -----Original Message-----
> From: Fan, Jeff [mailto:jeff.fan@intel.com]
> Sent: Wednesday, July 26, 2017 4:28 AM
> To: Marvin Häuser <Marvin.Haeuser@outlook.com>; edk2-
> devel@lists.01.org
> Cc: Kinney, Michael D <michael.d.kinney@intel.com>
> Subject: RE: [PATCH] MdePkg/SecPeiDxeTimerLibCpu: Consume UefiCpuPkg
> LAPIC code.
> 
> Marvin,
> 
> Could the following updating fix your issue?
> 
> ApicBase = MsrValue & ~0xfff;
> 
> Thanks!
> Jeff
> 
> -----Original Message-----
> From: edk2-devel [mailto:edk2-devel-bounces@lists.01.org] On Behalf Of
> Marvin Häuser
> Sent: Tuesday, July 25, 2017 12:57 AM
> To: edk2-devel@lists.01.org
> Cc: Kinney, Michael D
> Subject: Re: [edk2] [PATCH] MdePkg/SecPeiDxeTimerLibCpu: Consume
> UefiCpuPkg LAPIC code.
> 
> Hi Michael,
> 
> Sorry, I did not notice that UefiCpuPkg already has a similiar library.
> Could you please answer my question regarding the mask value which I
> considered incorrect nevertheless?
> I am getting compile-time errors as the mask promotes the value to UINT64,
> which is, on 32-bit platforms, implicitely casted to UINT32 (UINTN), resulting
> in the appropiate data loss warning.
> 
> Thanks for your answer!
> 
> Regards,
> Marvin.
> 
> > -----Original Message-----
> > From: Kinney, Michael D [mailto:michael.d.kinney@intel.com]
> > Sent: Monday, July 24, 2017 6:40 PM
> > To: Marvin Häuser <Marvin.Haeuser@outlook.com>; edk2-
> > devel@lists.01.org; Kinney, Michael D <michael.d.kinney@intel.com>
> > Cc: Gao, Liming <liming.gao@intel.com>
> > Subject: RE: [PATCH] MdePkg/SecPeiDxeTimerLibCpu: Consume
> UefiCpuPkg
> > LAPIC code.
> >
> > Hi Marvin,
> >
> > We should not add a dependency on the UefiCpuPkg to the MdePkg.  I
> > agree that a better location of the local APIC based timer lib would
> > be the UefiCpuPkg, and there is already one there called
> > SecPeiDxeTimerLibUefiCpu.
> >
> > The TimeLib in the MdePkg was created before the UefiCpuPkg was
> > created, which explains the current state of the MdePkg.
> >
> > The MdePkg version has other limitations noted in the INF and
> > recommends the UefiCpuPkg version be used.
> >
> > Thanks,
> >
> > Mike
> >
> > > -----Original Message-----
> > > From: Marvin Häuser [mailto:Marvin.Haeuser@outlook.com]
> > > Sent: Sunday, July 23, 2017 3:19 AM
> > > To: edk2-devel@lists.01.org
> > > Cc: Kinney, Michael D <michael.d.kinney@intel.com>; Gao, Liming
> > > <liming.gao@intel.com>
> > > Subject: RE: [PATCH] MdePkg/SecPeiDxeTimerLibCpu: Consume
> > UefiCpuPkg
> > > LAPIC code.
> > >
> > > Dear Michael and Liming,
> > >
> > > I submited the patch as the changes need to be done anyway, though I
> > > think the library might be better moved to UefiCpuPkg.
> > > Also, is my understanding of the mask value being incorrect right? I
> > > was confused by the 'ULL' suffix, which makes it look like it was
> > > intended. Is it?
> > >
> > > Regards,
> > > Marvin.
> > >
> > > > -----Original Message-----
> > > > From: edk2-devel [mailto:edk2-devel-bounces@lists.01.org] On
> > > Behalf Of
> > > > Marvin Häuser
> > > > Sent: Sunday, July 23, 2017 12:12 PM
> > > > To: edk2-devel@lists.01.org
> > > > Cc: michael.d.kinney@intel.com; liming.gao@intel.com
> > > > Subject: [edk2] [PATCH] MdePkg/SecPeiDxeTimerLibCpu: Consume
> > > > UefiCpuPkg LAPIC code.
> > > >
> > > > X86TimerLib is changed to use UefiCpuPkg LAPIC register
> > > definitions and
> > > > LocalApicLib to remove duplicated code. An implicite change is
> > > the value
> > > > returned by InternalX86GetApicBase() as it now returns the
> > > result of
> > > > GetLocalApicBaseAddress(), which is the full LAPIC address.
> > > This also
> > > > implicitely fixes the incorrect mask value used previously,
> > > which did not only
> > > > mask AcpiBase, but also the first nibble of AcpiBaseHi. This
> > > does not apply to
> > > > 32-bit platforms.
> > > >
> > > > Contributed-under: TianoCore Contribution Agreement 1.1
> > > > Signed-off-by: Marvin Haeuser <Marvin.Haeuser@outlook.com>
> > > > ---
> > > >  MdePkg/Library/SecPeiDxeTimerLibCpu/X86TimerLib.c            |
> > > 35 +++++++--
> > > > -----------
> > > >  MdePkg/Library/SecPeiDxeTimerLibCpu/SecPeiDxeTimerLibCpu.inf |
> > > 4 ++-
> > > >  MdePkg/MdePkg.dsc                                            |
> > > 3 ++
> > > >  3 files changed, 18 insertions(+), 24 deletions(-)
> > > >
> > > > diff --git a/MdePkg/Library/SecPeiDxeTimerLibCpu/X86TimerLib.c
> > > > b/MdePkg/Library/SecPeiDxeTimerLibCpu/X86TimerLib.c
> > > > index 76c66fbce6fb..fa6e6f213029 100644
> > > > --- a/MdePkg/Library/SecPeiDxeTimerLibCpu/X86TimerLib.c
> > > > +++ b/MdePkg/Library/SecPeiDxeTimerLibCpu/X86TimerLib.c
> > > > @@ -1,7 +1,7 @@
> > > >  /** @file
> > > >    Timer Library functions built upon local APIC on IA32/x64.
> > > >
> > > > -  Copyright (c) 2006 - 2015, Intel Corporation. All rights
> > > reserved.<BR>
> > > > +  Copyright (c) 2006 - 2017, Intel Corporation. All rights
> > > > + reserved.<BR>
> > > >    This program and the accompanying materials
> > > >    are licensed and made available under the terms and
> > > conditions of the BSD
> > > > License
> > > >    which accompanies this distribution.  The full text of the
> > > license may be
> > > > found at @@ -13,18 +13,14 @@  **/
> > > >
> > > >  #include <Base.h>
> > > > +#include <Register/LocalApic.h>
> > > > +#include <Library/LocalApicLib.h>
> > > >  #include <Library/TimerLib.h>
> > > >  #include <Library/BaseLib.h>
> > > >  #include <Library/IoLib.h>
> > > >  #include <Library/PcdLib.h>
> > > >  #include <Library/DebugLib.h>
> > > >
> > > > -#define APIC_SVR        0x0f0
> > > > -#define APIC_LVTERR     0x370
> > > > -#define APIC_TMICT      0x380
> > > > -#define APIC_TMCCT      0x390
> > > > -#define APIC_TDCR       0x3e0
> > > > -
> > > >  //
> > > >  // The following array is used in calculating the frequency of
> > > local APIC  //
> > > > timer. Refer to IA-32 developers' manual for more details.
> > > > @@ -54,30 +50,21 @@ InternalX86GetApicBase (
> > > >    VOID
> > > >    )
> > > >  {
> > > > -  UINTN                             MsrValue;
> > > >    UINTN                             ApicBase;
> > > >
> > > > -  MsrValue = (UINTN) AsmReadMsr64 (27);
> > > > -  ApicBase = MsrValue & 0xffffff000ULL;
> > > > -
> > > >    //
> > > > -  // Check the APIC Global Enable bit (bit 11) in
> > > IA32_APIC_BASE MSR.
> > > > -  // This bit will be 1, if local APIC is globally enabled.
> > > > +  // Verify local APIC is under XAPIC mode.
> > > >    //
> > > > -  ASSERT ((MsrValue & BIT11) != 0);
> > > > +  ASSERT (GetApicMode () == LOCAL_APIC_MODE_XAPIC);
> > > >
> > > > -  //
> > > > -  // Check the APIC Extended Mode bit (bit 10) in
> > > IA32_APIC_BASE MSR.
> > > > -  // This bit will be 0, if local APIC is under XAPIC mode.
> > > > -  //
> > > > -  ASSERT ((MsrValue & BIT10) == 0);
> > > > +  ApicBase = GetLocalApicBaseAddress ();
> > > >
> > > >    //
> > > >    // Check the APIC Software Enable/Disable bit (bit 8) in
> > > Spurious-Interrupt
> > > >    // Vector Register.
> > > >    // This bit will be 1, if local APIC is software enabled.
> > > >    //
> > > > -  ASSERT ((MmioRead32 (ApicBase + APIC_SVR) & BIT8) != 0);
> > > > +  ASSERT ((MmioRead32 (ApicBase +
> > > XAPIC_SPURIOUS_VECTOR_OFFSET) &
> > > > BIT8)
> > > > + != 0);
> > > >
> > > >    return ApicBase;
> > > >  }
> > > > @@ -98,7 +85,9 @@ InternalX86GetTimerFrequency (  {
> > > >    return
> > > >      PcdGet32(PcdFSBClock) /
> > > > -    mTimerLibLocalApicDivisor[MmioBitFieldRead32 (ApicBase +
> > > APIC_TDCR,
> > > > 0, 3)];
> > > > +    mTimerLibLocalApicDivisor[
> > > > +      MmioBitFieldRead32 (ApicBase +
> > > > XAPIC_TIMER_DIVIDE_CONFIGURATION_OFFSET, 0, 3)
> > > > +      ];
> > > >  }
> > > >
> > > >  /**
> > > > @@ -115,7 +104,7 @@ InternalX86GetTimerTick (
> > > >    IN      UINTN                     ApicBase
> > > >    )
> > > >  {
> > > > -  return MmioRead32 (ApicBase + APIC_TMCCT);
> > > > +  return MmioRead32 (ApicBase +
> > > > XAPIC_TIMER_CURRENT_COUNT_OFFSET);
> > > >  }
> > > >
> > > >  /**
> > > > @@ -131,7 +120,7 @@ InternalX86GetInitTimerCount (
> > > >    IN      UINTN                     ApicBase
> > > >    )
> > > >  {
> > > > -  return MmioRead32 (ApicBase + APIC_TMICT);
> > > > +  return MmioRead32 (ApicBase +
> > > XAPIC_TIMER_INIT_COUNT_OFFSET);
> > > >  }
> > > >
> > > >  /**
> > > > diff --git
> > > > a/MdePkg/Library/SecPeiDxeTimerLibCpu/SecPeiDxeTimerLibCpu.inf
> > > > b/MdePkg/Library/SecPeiDxeTimerLibCpu/SecPeiDxeTimerLibCpu.inf
> > > > index a00ebb0eeb64..286da09db174 100644
> > > > ---
> > > a/MdePkg/Library/SecPeiDxeTimerLibCpu/SecPeiDxeTimerLibCpu.inf
> > > > +++
> > > b/MdePkg/Library/SecPeiDxeTimerLibCpu/SecPeiDxeTimerLibCpu.inf
> > > > @@ -13,7 +13,7 @@
> > > >  # Note that for IA-32 and x64, this library only supports
> > > xAPIC mode. If
> > > > x2APIC  # support is desired, the SecPeiDxeTimerLibUefiCpu
> > > library can be
> > > > used.
> > > >  #
> > > > -# Copyright (c) 2007 - 2014, Intel Corporation. All rights
> > > reserved.<BR>
> > > > +# Copyright (c) 2007 - 2017, Intel Corporation. All rights
> > > > +reserved.<BR>
> > > >  #
> > > >  #  This program and the accompanying materials  #  are
> > > licensed and made
> > > > available under the terms and conditions of the BSD License @@
> > > -48,6 +48,7
> > > > @@ [Sources.IPF]
> > > >
> > > >  [Packages]
> > > >    MdePkg/MdePkg.dec
> > > > +  UefiCpuPkg/UefiCpuPkg.dec
> > > >
> > > >
> > > >  [LibraryClasses]
> > > > @@ -57,6 +58,7 @@ [LibraryClasses.IA32, LibraryClasses.X64]
> > > >    PcdLib
> > > >    IoLib
> > > >    DebugLib
> > > > +  LocalApicLib
> > > >
> > > >  [LibraryClasses.IPF]
> > > >    PalLib
> > > > diff --git a/MdePkg/MdePkg.dsc b/MdePkg/MdePkg.dsc index
> > > > 010ce533d7ea..8988d1947566 100644
> > > > --- a/MdePkg/MdePkg.dsc
> > > > +++ b/MdePkg/MdePkg.dsc
> > > > @@ -35,6 +35,9 @@ [PcdsFixedAtBuild]  [PcdsFixedAtBuild.IPF]
> > > >
> > > gEfiMdePkgTokenSpaceGuid.PcdIoBlockBaseAddressForIpf|0x0ffffc0000
> > > 00
> > > >
> > > > +[LibraryClasses]
> > > > +
> > > >
> > > +LocalApicLib|UefiCpuPkg/Library/BaseXApicX2ApicLib/BaseXApicX2Ap
> > > icLib.i
> > > > +nf
> > > > +
> > > >
> > > >
> >
> ##########################################################
> > > > #########################################
> > > >  #
> > > >  # Components Section - list of the modules and components that
> > > will be
> > > > processed by compilation
> > > > --
> > > > 2.12.2.windows.2
> > > >
> > > > _______________________________________________
> > > > edk2-devel mailing list
> > > > edk2-devel@lists.01.org
> > > > https://lists.01.org/mailman/listinfo/edk2-devel
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