Add more comments for PCD.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@5576 6f19259b-4bc3-4df7-8a09-765794883524

1 files changed, 24 insertions, 0 deletions

diff --git a/MdeModulePkg/MdeModulePkg.dec b/MdeModulePkg/MdeModulePkg.dec
index 9c521ae8c6..addad6dd9a 100644
--- a/MdeModulePkg/MdeModulePkg.dec
+++ b/MdeModulePkg/MdeModulePkg.dec
@@ -109,6 +109,10 @@
 [PcdsFeatureFlag.common]

   gEfiMdeModulePkgTokenSpaceGuid.PcdSupportUpdateCapsuleRest|FALSE|BOOLEAN|0x0001001d

   gEfiMdeModulePkgTokenSpaceGuid.PcdPeiPcdDatabaseTraverseEnabled|TRUE|BOOLEAN|0x00010020

+  ## If PcdDxePcdDatabaseTraverseEnabled is TRUE, PCD_PROTOCOL.GetNextToken can 

+  #  get next PCD entry from PCD database, If FALSE, PCD_PROTOCOL.GetNextToken 

+  #  return EFI_SUPPORTED.

+  #

   gEfiMdeModulePkgTokenSpaceGuid.PcdDxePcdDatabaseTraverseEnabled|TRUE|BOOLEAN|0x00010021

   gEfiMdeModulePkgTokenSpaceGuid.PcdPeiPcdDatabaseSetEnabled|TRUE|BOOLEAN|0x00010030

   gEfiMdeModulePkgTokenSpaceGuid.PcdPeiPcdDatabaseGetSizeEnabled|TRUE|BOOLEAN|0x00010031

@@ -126,8 +130,15 @@
   gEfiMdeModulePkgTokenSpaceGuid.PcdUnicodeCollation2Support|TRUE|BOOLEAN|0x00010041

   gEfiMdeModulePkgTokenSpaceGuid.PcdConOutGopSupport|TRUE|BOOLEAN|0x00010042

   gEfiMdeModulePkgTokenSpaceGuid.PcdConOutUgaSupport|TRUE|BOOLEAN|0x00010043

+  ## If PcdPeiCoreImageLoaderSearchTeSectionFirst is TRUE, PeiCore will search TE section

+  #  firstly when loading an PEIM image, If FALSE, PeiCore will search PE section firstly.

+  #

   gEfiMdeModulePkgTokenSpaceGuid.PcdPeiCoreImageLoaderSearchTeSectionFirst|TRUE|BOOLEAN|0x00010044

+  ## If PcdSupportHardwareErrorRecord is TRUE, support hardware error record via variable.

+  #  If FALSE, does not support.

   gEfiMdeModulePkgTokenSpaceGuid.PcdSupportHardwareErrorRecord|FALSE|BOOLEAN|0x00010045

+  ## If PcdUgaConsumeSupport is TRUE, EFI_UGA_DRAW_PROTOCOL is produced by platform.

+  #  Otherwice, EFI_UGA_DRAW_PROTOCOL is not produced by platform.

   gEfiMdeModulePkgTokenSpaceGuid.PcdUgaConsumeSupport|TRUE|BOOLEAN|0x00010046

   gEfiMdeModulePkgTokenSpaceGuid.PcdTurnOffUsbLegacySupport|FALSE|BOOLEAN|0x00010047

 

@@ -139,14 +150,24 @@
   gEfiMdeModulePkgTokenSpaceGuid.PcdSupportFullConfigRoutingProtocol|TRUE|BOOLEAN|0x00010202

 

 [PcdsFixedAtBuild.common]

+  ## Dynamic type PCD can be registered callback function for Pcd setting action.

+  #  PcdMaxPeiPcdCallBackNumberPerPcdEntry indicate maximum number of callback function

+  #  for a dynamic PCD used in PEI phase.

   gEfiMdeModulePkgTokenSpaceGuid.PcdMaxPeiPcdCallBackNumberPerPcdEntry|0x08|UINT32|0x0001000f

+  ## VPD type PCD allow developer point an absoluted physical address PcdVpdBaseAddress

+  #  to store PCD value. 

+  #

   gEfiMdeModulePkgTokenSpaceGuid.PcdVpdBaseAddress|0x0|UINT32|0x00010010

   gEfiMdeModulePkgTokenSpaceGuid.PcdMaxSizePopulateCapsule|0x6400000|UINT32|0x0001001e

   gEfiMdeModulePkgTokenSpaceGuid.PcdMaxSizeNonPopulateCapsule|0xa00000|UINT32|0x0001001f

   gEfiMdeModulePkgTokenSpaceGuid.PcdMaxPeiPerformanceLogEntries|40|UINT8|0x0001002f

+  ## Maximum number of FV is supported by PeiCore's dispatching.

   gEfiMdeModulePkgTokenSpaceGuid.PcdPeiCoreMaxFvSupported|6|UINT32|0x00010030

+  ## Maximum PEIM count in every FV is supported by PeiCore's dispatching.

   gEfiMdeModulePkgTokenSpaceGuid.PcdPeiCoreMaxPeimPerFv|32|UINT32|0x00010031

+  ## Maximum stack size for PeiCore.

   gEfiMdeModulePkgTokenSpaceGuid.PcdPeiCoreMaxPeiStackSize|0x20000|UINT32|0x00010032

+  ## Maximum PPI count is supported by PeiCore's PPI database.

   gEfiMdeModulePkgTokenSpaceGuid.PcdPeiCoreMaxPpiSupported|64|UINT32|0x00010033

   gEfiMdeModulePkgTokenSpaceGuid.PcdRealTimeClockUpdateTimeout|100000|UINT32|0x00010034

   gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageVariableBase|0x0|UINT32|0x30000001

@@ -158,7 +179,10 @@
   gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwSpareSize|0x0|UINT32|0x30000014

   gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwWorkingBase|0x0|UINT32|0x30000010

   gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwWorkingSize|0x0|UINT32|0x30000011

+  ## Default timeout value for displaying progressing bar in before boot OS.

+  #  This value can be changed in BDS.

   gEfiMdeModulePkgTokenSpaceGuid.PcdPlatformBootTimeOutDefault|10|UINT16|0x40000001

+  ## error level for hardware recorder.

   gEfiMdeModulePkgTokenSpaceGuid.PcdHardwareErrorRecordLevel|1|UINT16|0x40000002

 

 [PcdsFixedAtBuild.IA32]