Device.py revision 4439 
1from m5.params import *
2from m5.proxy import *
3from MemObject import MemObject
4
5class PioDevice(MemObject):
6    type = 'PioDevice'
7    abstract = True
8    pio = Port("Programmed I/O port")
9    platform = Param.Platform(Parent.any, "Platform this device is part of")
10    system = Param.System(Parent.any, "System this device is part of")
11
12class BasicPioDevice(PioDevice):
13    type = 'BasicPioDevice'
14    abstract = True
15    pio_addr = Param.Addr("Device Address")
16    pio_latency = Param.Latency('1ns', "Programmed IO latency in simticks")
17
18class DmaDevice(PioDevice):
19    type = 'DmaDevice'
20    abstract = True
21    dma = Port(Self.pio.peerObj.port, "DMA port")
22    min_backoff_delay = Param.Latency('4ns',
23      "min time between a nack packet being received and the next request made by the device")
24    max_backoff_delay = Param.Latency('10us',
25      "max time between a nack packet being received and the next request made by the device")
26
27
28
29class IsaFake(BasicPioDevice):
30    type = 'IsaFake'
31    pio_size = Param.Addr(0x8, "Size of address range")
32    ret_data8 = Param.UInt8(0xFF, "Default data to return")
33    ret_data16 = Param.UInt16(0xFFFF, "Default data to return")
34    ret_data32 = Param.UInt32(0xFFFFFFFF, "Default data to return")
35    ret_data64 = Param.UInt64(0xFFFFFFFFFFFFFFFF, "Default data to return")
36    ret_bad_addr = Param.Bool(False, "Return pkt status bad address on access")
37    update_data = Param.Bool(False, "Update the data that is returned on writes")
38    warn_access = Param.String("", "String to print when device is accessed")
39
40class BadAddr(IsaFake):
41    ret_bad_addr = Param.Bool(True, "Return pkt status bad address on access")
42
43
44