?? device.py
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from m5 import *from FunctionalMemory import FunctionalMemory# This device exists only because there are some devices that I don't# want to have a Platform parameter because it would cause a cycle in# the C++ that cannot be easily solved.## The real solution to this problem is to pass the ParamXXX structure# to the constructor, but with the express condition that SimObject# parameter values are not to be available at construction time. If# some further configuration must be done, it must be done during the# initialization phase at which point all SimObject pointers will be# valid.class FooPioDevice(FunctionalMemory): type = 'PioDevice' abstract = True addr = Param.Addr("Device Address") mmu = Param.MemoryController(Parent.any, "Memory Controller") io_bus = Param.Bus(NULL, "The IO Bus to attach to") pio_latency = Param.Tick(1, "Programmed IO latency in bus cycles")class FooDmaDevice(FooPioDevice): type = 'DmaDevice' abstract = Trueclass PioDevice(FooPioDevice): type = 'PioDevice' abstract = True platform = Param.Platform(Parent.any, "Platform")class DmaDevice(PioDevice): type = 'DmaDevice' abstract = True
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