1. A method of translating addresses in a computing environment, said method comprising: obtaining, by a processor, an address from an adapter to be translated, the address comprising a plurality of bits, the plurality of bits comprising a first portion of bits and a second portion of bits; receiving an address range value that indicates a range of permitted addresses; validating the address using at least the first portion of bits and the received address range; and converting the address to a memory address usable in accessing memory of the computing environment, the converting ignoring the first portion of bits and using the second portion of bits to obtain address information from one or more levels of address translation tables to perform the converting.