On 08/16/19 05:57, Eric Dong wrote: > REF: https://bugzilla.tianocore.org/show_bug.cgi?id=2040 > > Add below new micros which test the current value before write the new > value. Only write new value when current value not same as new value. > CPU_REGISTER_TABLE_TEST_THEN_WRITE32 > CPU_REGISTER_TABLE_TEST_THEN_WRITE64 > CPU_REGISTER_TABLE_TEST_THEN_WRITE_FIELD > > Also add below API: > CpuRegisterTableTestThenWrite > > Signed-off-by: Eric Dong <eric.d...@intel.com> > Cc: Ray Ni <ray...@intel.com> > Cc: Laszlo Ersek <ler...@redhat.com> > Cc: Star Zeng <star.z...@intel.com> > --- > UefiCpuPkg/Include/AcpiCpuData.h | 3 +- > .../Include/Library/RegisterCpuFeaturesLib.h | 91 +++++++++++++++++++ > .../RegisterCpuFeaturesLib.c | 44 ++++++++- > 3 files changed, 134 insertions(+), 4 deletions(-) > > diff --git a/UefiCpuPkg/Include/AcpiCpuData.h > b/UefiCpuPkg/Include/AcpiCpuData.h > index b963a2f592..77da5d4455 100644 > --- a/UefiCpuPkg/Include/AcpiCpuData.h > +++ b/UefiCpuPkg/Include/AcpiCpuData.h > @@ -78,7 +78,8 @@ typedef struct { > UINT32 Index; // offset 4 - 7 > UINT8 ValidBitStart; // offset 8 > UINT8 ValidBitLength; // offset 9 > - UINT16 Reserved; // offset 10 - 11 > + BOOLEAN TestThenWrite; // offset 10 > + UINT8 Reserved1; // offset 11 > UINT32 HighIndex; // offset 12-15, only valid for > MemoryMapped > UINT64 Value; // offset 16-23 > } CPU_REGISTER_TABLE_ENTRY;
Acked-by: Laszlo Ersek <ler...@redhat.com> -=-=-=-=-=-=-=-=-=-=-=- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#45829): https://edk2.groups.io/g/devel/message/45829 Mute This Topic: https://groups.io/mt/32894958/21656 Group Owner: devel+ow...@edk2.groups.io Unsubscribe: https://edk2.groups.io/g/devel/unsub [arch...@mail-archive.com] -=-=-=-=-=-=-=-=-=-=-=-
