diff options
| author | Jeff Fan <jeff.fan@intel.com> | 2015-12-08 05:19:34 +0000 |
|---|---|---|
| committer | vanjeff <vanjeff@Edk2> | 2015-12-08 05:19:34 +0000 |
| commit | 46309b1101b626c8d3528d85d48383ea156fedf0 (patch) | |
| tree | e511e1fc95bfa5c4521a24da1e529ec1ea0f6093 /UefiCpuPkg/UefiCpuPkg.dec | |
| parent | 5c1edc553492d031d66ac2bfcf134d72e513c415 (diff) | |
| download | edk2-46309b1101b626c8d3528d85d48383ea156fedf0.tar.gz edk2-46309b1101b626c8d3528d85d48383ea156fedf0.tar.bz2 edk2-46309b1101b626c8d3528d85d48383ea156fedf0.zip | |
UefiCpuPkg/MtrrLib: Add PCD PcdCpuNumberOfReservedVariableMtrrs
Current MtrrLib reserves 2 variable MTRRs for some legacy OS boot (CSM boots)
may require some MTRRs to be reserved for OS use. But UEFI OS boot will not use
MTRRs.
Per Scott's suggestion in
link: http://article.gmane.org/gmane.comp.bios.edk2.devel/4099
Add one PCD PcdCpuNumberOfReservedVariableMtrrs to specify the number of
variable MTRRs reserved for OS use. Setting its default value to 2 is for
back-compatibility.
Cc: Scott Duplichan <scott@notabs.org>
Cc: Feng Tian <feng.tian@intel.com>
Cc: Michael Kinney <michael.d.kinney@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jeff Fan <jeff.fan@intel.com>
Suggested-by: Scott Duplichan <scott@notabs.org>
Reviewed-by: Feng Tian <feng.tian@intel.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@19151 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'UefiCpuPkg/UefiCpuPkg.dec')
| -rw-r--r-- | UefiCpuPkg/UefiCpuPkg.dec | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/UefiCpuPkg/UefiCpuPkg.dec b/UefiCpuPkg/UefiCpuPkg.dec index e783a7b536..a694146689 100644 --- a/UefiCpuPkg/UefiCpuPkg.dec +++ b/UefiCpuPkg/UefiCpuPkg.dec @@ -167,6 +167,11 @@ # @Prompt SMM CPU Synchronization Method.
gUefiCpuPkgTokenSpaceGuid.PcdCpuSmmSyncMode|0x00|UINT8|0x60000014
+ ## Specifies the number of variable MTRRs reserved for OS use. The default number of
+ # MTRRs reserved for OS use is 2.
+ # @Prompt Number of reserved variable MTRRs.
+ gUefiCpuPkgTokenSpaceGuid.PcdCpuNumberOfReservedVariableMtrrs|0x2|UINT32|0x00000015
+
[PcdsFixedAtBuild, PcdsPatchableInModule, PcdsDynamic, PcdsDynamicEx]
## Specifies timeout value in microseconds for the BSP to detect all APs for the first time.
# @Prompt Timeout for the BSP to detect all APs for the first time.
|