gEfiMdeModulePkgTokenSpaceGuid.PcdBoottimeReservedNvVariableSpaceSize

The size of NV variable space reserved at UEFI boottime.


Note that this value must be less than (PcdFlashNvStorageVariableSize - EFI_FIRMWARE_VOLUME_HEADER.HeaderLength - sizeof (VARIABLE_STORE_HEADER) - PcdHwErrStorageSize).

In EdkII implementation, variable driver can reserved some NV storage region for boottime settings.
So at UEFI runtime, the variable service consumer can not exhaust full NV storage region.

Then the common NV variable space size at boottime will be
(PcdFlashNvStorageVariableSize - EFI_FIRMWARE_VOLUME_HEADER.HeaderLength - sizeof (VARIABLE_STORE_HEADER) - PcdHwErrStorageSize),

and the common NV variable space size at runtime will be
(PcdFlashNvStorageVariableSize - EFI_FIRMWARE_VOLUME_HEADER.HeaderLength - sizeof (VARIABLE_STORE_HEADER) - PcdHwErrStorageSize) - PcdBoottimeReservedNvVariableSpaceSize.

Boottime reserved NV variable space size.

PCD Information

NameToken SpaceToken numberData TypeDefault Value
PcdBoottimeReservedNvVariableSpaceSizegEfiMdeModulePkgTokenSpaceGuid0x30000007UINT320x00

Generated on Thu Sep 24 23:30:15 2015 for MdeModulePkg[ALL] by  doxygen 1.5.7.1