gem5/src/mem/Bridge.py
Ali Saidi 06a9f58c68 DMA: Add IOCache and fix bus bridge to optionally only send requests one
way so a cache can handle partial block requests for i/o devices.

--HG--
extra : convert_revision : a68b5ae826731bc87ed93eb7ef326a2393053964
2007-08-10 16:14:01 -04:00

46 lines
2.4 KiB
Python

# Copyright (c) 2006-2007 The Regents of The University of Michigan
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met: redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer;
# redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution;
# neither the name of the copyright holders nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# Authors: Ali Saidi
from m5.params import *
from MemObject import MemObject
class Bridge(MemObject):
type = 'Bridge'
side_a = Port('Side A port')
side_b = Port('Side B port')
req_size_a = Param.Int(16, "The number of requests to buffer")
req_size_b = Param.Int(16, "The number of requests to buffer")
resp_size_a = Param.Int(16, "The number of requests to buffer")
resp_size_b = Param.Int(16, "The number of requests to buffer")
delay = Param.Latency('0ns', "The latency of this bridge")
nack_delay = Param.Latency('0ns', "The latency of this bridge")
write_ack = Param.Bool(False, "Should this bridge ack writes")
filter_ranges_a = VectorParam.AddrRange([],
"What addresses shouldn't be passed through the side of the bridge")
filter_ranges_b = VectorParam.AddrRange([],
"What addresses shouldn't be passed through the side of the bridge")