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from m5.params import *
from m5.proxy import *
from MemObject import MemObject
class PioDevice(MemObject):
type = 'PioDevice'
abstract = True
pio = Port("Programmed I/O port")
platform = Param.Platform(Parent.any, "Platform this device is part of")
system = Param.System(Parent.any, "System this device is part of")
class BasicPioDevice(PioDevice):
type = 'BasicPioDevice'
abstract = True
pio_addr = Param.Addr("Device Address")
pio_latency = Param.Latency('1ns', "Programmed IO latency in simticks")
class DmaDevice(PioDevice):
type = 'DmaDevice'
abstract = True
dma = Port(Self.pio.peerObj.port, "DMA port")
min_backoff_delay = Param.Latency('4ns',
"min time between a nack packet being received and the next request made by the device")
max_backoff_delay = Param.Latency('10us',
"max time between a nack packet being received and the next request made by the device")
class IsaFake(BasicPioDevice):
type = 'IsaFake'
pio_size = Param.Addr(0x8, "Size of address range")
ret_data8 = Param.UInt8(0xFF, "Default data to return")
ret_data16 = Param.UInt16(0xFFFF, "Default data to return")
ret_data32 = Param.UInt32(0xFFFFFFFF, "Default data to return")
ret_data64 = Param.UInt64(0xFFFFFFFFFFFFFFFF, "Default data to return")
ret_bad_addr = Param.Bool(False, "Return pkt status bad address on access")
update_data = Param.Bool(False, "Update the data that is returned on writes")
warn_access = Param.String("", "String to print when device is accessed")
class BadAddr(IsaFake):
ret_bad_addr = Param.Bool(True, "Return pkt status bad address on access")
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