12d903a650
can specify either independently.
python/m5/objects/Device.py:
io_bus is split out into pio_bus and dma_bus so that any device
can specify either independently.
dma_bus defaults to point to whatever pio_bus uses.
--HG--
extra : convert_revision : d35d5374d0bf592f6b5df465c05203577b8b8763
36 lines
1.3 KiB
Python
36 lines
1.3 KiB
Python
from m5 import *
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from FunctionalMemory import FunctionalMemory
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# This device exists only because there are some devices that I don't
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# want to have a Platform parameter because it would cause a cycle in
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# the C++ that cannot be easily solved.
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#
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# The real solution to this problem is to pass the ParamXXX structure
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# to the constructor, but with the express condition that SimObject
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# parameter values are not to be available at construction time. If
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# some further configuration must be done, it must be done during the
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# initialization phase at which point all SimObject pointers will be
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# valid.
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class FooPioDevice(FunctionalMemory):
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type = 'PioDevice'
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abstract = True
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addr = Param.Addr("Device Address")
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mmu = Param.MemoryController(Parent.any, "Memory Controller")
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pio_bus = Param.Bus(NULL, "Bus to attach to for PIO")
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pio_latency = Param.Tick(1, "Programmed IO latency in bus cycles")
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class FooDmaDevice(FooPioDevice):
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type = 'DmaDevice'
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abstract = True
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dma_bus = Param.Bus(Self.pio_bus, "Bus to attach to for DMA")
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class PioDevice(FooPioDevice):
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type = 'PioDevice'
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abstract = True
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platform = Param.Platform(Parent.any, "Platform")
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class DmaDevice(PioDevice):
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type = 'DmaDevice'
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abstract = True
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dma_bus = Param.Bus(Self.pio_bus, "Bus to attach to for DMA")
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