tyler.durden
/
audk
mirror of https://github.com/acidanthera/audk.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

UefiCpuPkg: Add PCD PcdCpuApLoopMode 

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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
UefiCpuPkg/UefiCpuPkg.dec
View File

@ -182,6 +182,14 @@
## Specifies the size of the microcode Region.
# @Prompt Microcode Region size.
gUefiCpuPkgTokenSpaceGuid.PcdCpuMicrocodePatchRegionSize|0x0|UINT64|0x00000006
## Specifies the AP wait loop state during POST phase.
# The value is defined as below.<BR><BR>
# 1: Place AP in the Hlt-Loop state.<BR>
# 2: Place AP in the Mwait-Loop state.<BR>
# 3: Place AP in the Run-Loop state.<BR>
# @Prompt The AP wait loop state.
# @ValidRange 0x80000001 | 1 - 3
gUefiCpuPkgTokenSpaceGuid.PcdCpuApLoopMode|1|UINT8|0x60008006
[PcdsDynamic, PcdsDynamicEx]
## Contains the pointer to a CPU S3 data buffer of structure ACPI_CPU_DATA.

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."