4babffa18803476e9ce0c425ab45893a35657769
1 # Copyright (c) 2005-2007 The Regents of The University of Michigan
4 # Redistribution and use in source and binary forms, with or without
5 # modification, are permitted provided that the following conditions are
6 # met: redistributions of source code must retain the above copyright
7 # notice, this list of conditions and the following disclaimer;
8 # redistributions in binary form must reproduce the above copyright
9 # notice, this list of conditions and the following disclaimer in the
10 # documentation and/or other materials provided with the distribution;
11 # neither the name of the copyright holders nor the names of its
12 # contributors may be used to endorse or promote products derived from
13 # this software without specific prior written permission.
15 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16 # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17 # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
18 # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
19 # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
20 # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
21 # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
25 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 # Authors: Nathan Binkert
29 from m5
.params
import *
30 from m5
.proxy
import *
31 from MemObject
import MemObject
33 class PioDevice(MemObject
):
36 pio
= Port("Programmed I/O port")
37 platform
= Param
.Platform(Parent
.any
, "Platform this device is part of")
38 system
= Param
.System(Parent
.any
, "System this device is part of")
40 class BasicPioDevice(PioDevice
):
41 type = 'BasicPioDevice'
43 pio_addr
= Param
.Addr("Device Address")
44 pio_latency
= Param
.Latency('1ns', "Programmed IO latency in simticks")
46 class DmaDevice(PioDevice
):
49 dma
= Port(Self
.pio
.peerObj
.port
, "DMA port")
50 min_backoff_delay
= Param
.Latency('4ns',
51 "min time between a nack packet being received and the next request made by the device")
52 max_backoff_delay
= Param
.Latency('10us',
53 "max time between a nack packet being received and the next request made by the device")
57 class IsaFake(BasicPioDevice
):
59 pio_size
= Param
.Addr(0x8, "Size of address range")
60 ret_data8
= Param
.UInt8(0xFF, "Default data to return")
61 ret_data16
= Param
.UInt16(0xFFFF, "Default data to return")
62 ret_data32
= Param
.UInt32(0xFFFFFFFF, "Default data to return")
63 ret_data64
= Param
.UInt64(0xFFFFFFFFFFFFFFFF, "Default data to return")
64 ret_bad_addr
= Param
.Bool(False, "Return pkt status bad address on access")
65 update_data
= Param
.Bool(False, "Update the data that is returned on writes")
66 warn_access
= Param
.String("", "String to print when device is accessed")
68 class BadAddr(IsaFake
):
70 ret_bad_addr
= Param
.Bool(True, "Return pkt status bad address on access")