sravan/system76-edk2
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

UefiCpuPkg: Add PCD PcdCpuApLoopMode

Browse Source 
This new PCD is used to specify the AP loop mode during POST phase.

The value 1 means we will place AP in the Hlt-Loop state by HLT instruction.
BSP need to send INIT-SIPI-SIPI to wake up APs.

The value 2 means we will place AP in the deepest C-state by MWAIT instruction.
BSP need to modify the monitor buffer by MONITOR instruction to wake up APs.

The value 3 means we will place AP in the Run-loop state. APs are running.
BSP need to write one semaphore to wake up APs.

Contributed-under: TianoCore Contribution Agreement 1.0
Cc: Feng Tian <feng.tian@intel.com>
Cc: Michael Kinney <michael.d.kinney@intel.com>
Cc: Jordan Justen <jordan.l.justen@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jeff Fan <jeff.fan@intel.com>
Tested-by: Michael Kinney <michael.d.kinney@intel.com>
Reviewed-by: Michael Kinney <michael.d.kinney@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@19341 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Jeff Fan
2015-12-18 03:23:27 +00:00
committed by vanjeff
parent d603b1151c
commit 54a3e8c9f5
2 changed files with 12 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
UefiCpuPkg/UefiCpuPkg.uni
View File

@@ -139,3 +139,7 @@
#string STR_gUefiCpuPkgTokenSpaceGuid_PcdCpuNumberOfReservedVariableMtrrs_HELP #language en-US "Specifies the number of variable MTRRs reserved for OS use."
#string STR_gUefiCpuPkgTokenSpaceGuid_PcdCpuApLoopMode_PROMPT #language en-US "The AP wait loop state"
#string STR_gUefiCpuPkgTokenSpaceGuid_PcdCpuApLoopMode_HELP #language en-US "Specifies the AP wait loop state during POST phase."