AMD UEFIs - Padding from 0x0 to 0x37000 ?

It seems all AMD UEFI images have padding from 0x0 to 0x37000 hex, regardless of manufacturer (ASRock, Biostar, Gigabyte, MSI, etc.). I suppose it could be a byproduct of the AMI format, PSPTool doesn’t pick it up as part of AMD firmware…at least not yet. Does anyone know the purpose of this section?