Specify memory size with bytes for OPROM to find free memory.
The value should be a multiple of 4KB. And the range should be below the EBDA reserved range from
(CONVENTIONAL_MEMORY_TOP - Reserved EBDA Memory Size) to CONVENTIONAL_MEMORY_TOP.
Reserved Memory Size for OPROM
0x80000001 | (gEfiIntelFrameworkModulePkgTokenSpaceGuid.PcdOpromReservedMemorySize < 0x80000) AND ((gEfiIntelFrameworkModulePkgTokenSpaceGuid.PcdOpromReservedMemorySize & 0x1000) == 0)
Name | Token Space | Token number | Data Type | Default Value |
PcdOpromReservedMemorySize | gEfiIntelFrameworkModulePkgTokenSpaceGuid | 0x3000000d | UINT32 | 0x28000 |