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| author | Donald Kuo <donald.kuo@intel.com> | 2019-08-12 12:34:39 +0800 |
|---|---|---|
| committer | Liming Gao <liming.gao@intel.com> | 2019-08-21 21:36:56 +0800 |
| commit | 30781febe2106cc0d7186e70136120353cd67df2 (patch) | |
| tree | ca7d4e6e1297ef9575f6ec2bcdeeff48aee75dbc /UefiCpuPkg/UefiCpuPkg.dec | |
| parent | 9c90d39b600bd33c7e0600865e6d860d46ce95f3 (diff) | |
| download | edk2-30781febe2106cc0d7186e70136120353cd67df2.tar.gz edk2-30781febe2106cc0d7186e70136120353cd67df2.tar.bz2 edk2-30781febe2106cc0d7186e70136120353cd67df2.zip | |
UefiCpuPkg: Adding a new TSC library by using CPUID(0x15) TSC leaf
REF: https://bugzilla.tianocore.org/show_bug.cgi?id=1909
Cc: Ray Ni <ray.ni@intel.com>
Cc: Star Zeng <star.zeng@intel.com>
Cc: Eric Dong <eric.dong@intel.com>
Cc: Amy Chan <amy.chan@intel.com>
Cc: Rangasai V Chaganty <rangasai.v.chaganty@intel.com>
Signed-off-by: Donald Kuo <donald.kuo@intel.com>
Reviewed-by: Eric Dong <eric.dong@intel.com>
Diffstat (limited to 'UefiCpuPkg/UefiCpuPkg.dec')
| -rw-r--r-- | UefiCpuPkg/UefiCpuPkg.dec | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/UefiCpuPkg/UefiCpuPkg.dec b/UefiCpuPkg/UefiCpuPkg.dec index 14ddaa8633..86ad61f64b 100644 --- a/UefiCpuPkg/UefiCpuPkg.dec +++ b/UefiCpuPkg/UefiCpuPkg.dec @@ -211,6 +211,14 @@ # @Prompt If CPU features will be initialized during S3 resume.
gUefiCpuPkgTokenSpaceGuid.PcdCpuFeaturesInitOnS3Resume|FALSE|BOOLEAN|0x0000001D
+ ## Specifies CPUID Leaf 0x15 Time Stamp Counter and Nominal Core Crystal Clock Frequency.
+ # TSC Frequency = ECX (core crystal clock frequency) * EBX/EAX.
+ # Intel Xeon Processor Scalable Family with CPUID signature 06_55H = 25000000 (25MHz)
+ # 6th and 7th generation Intel Core processors and Intel Xeon W Processor Family = 24000000 (24MHz)
+ # Intel Atom processors based on Goldmont Microarchitecture with CPUID signature 06_5CH = 19200000 (19.2MHz)
+ # @Prompt This PCD is the nominal frequency of the core crystal clock in Hz as is CPUID Leaf 0x15:ECX
+ gUefiCpuPkgTokenSpaceGuid.PcdCpuCoreCrystalClockFrequency|24000000|UINT64|0x32132113
+
[PcdsFixedAtBuild, PcdsPatchableInModule, PcdsDynamic, PcdsDynamicEx]
## Specifies max supported number of Logical Processors.
# @Prompt Configure max supported number of Logical Processors
|