Made DRAMCtrl a ClockedObject, with DRAMInterface defined as an AbstractMemory. The address ranges are now defined per interface. Currently the model only includes a DRAMInterface but this can be expanded for other media types. The controller object includes a parameter to the interface, which is setup when gem5 is configured. Change-Id: I6a368b845d574a713c7196c5671188ca8c1dc5e8 Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/28968 Reviewed-by: Jason Lowe-Power <power.jg@gmail.com> Maintainer: Jason Lowe-Power <power.jg@gmail.com> Tested-by: kokoro <noreply+kokoro@google.com>