Revision: 19341
http://sourceforge.net/p/edk2/code/19341
Author: vanjeff
Date: 2015-12-18 03:23:27 +0000 (Fri, 18 Dec 2015)
Log Message:
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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 <[email protected]>
Cc: Michael Kinney <[email protected]>
Cc: Jordan Justen <[email protected]>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jeff Fan <[email protected]>
Tested-by: Michael Kinney <[email protected]>
Reviewed-by: Michael Kinney <[email protected]>
Modified Paths:
--------------
trunk/edk2/UefiCpuPkg/UefiCpuPkg.dec
trunk/edk2/UefiCpuPkg/UefiCpuPkg.uni
Modified: trunk/edk2/UefiCpuPkg/UefiCpuPkg.dec
===================================================================
--- trunk/edk2/UefiCpuPkg/UefiCpuPkg.dec 2015-12-18 03:22:56 UTC (rev
19340)
+++ trunk/edk2/UefiCpuPkg/UefiCpuPkg.dec 2015-12-18 03:23:27 UTC (rev
19341)
@@ -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.
Modified: trunk/edk2/UefiCpuPkg/UefiCpuPkg.uni
===================================================================
--- trunk/edk2/UefiCpuPkg/UefiCpuPkg.uni 2015-12-18 03:22:56 UTC (rev
19340)
+++ trunk/edk2/UefiCpuPkg/UefiCpuPkg.uni 2015-12-18 03:23:27 UTC (rev
19341)
@@ -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."
+
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