5a9a743cfc
This patch classifies all ports in Python as either Master or Slave and enforces a binding of master to slave. Conceptually, a master (such as a CPU or DMA port) issues requests, and receives responses, and conversely, a slave (such as a memory or a PIO device) receives requests and sends back responses. Currently there is no differentiation between coherent and non-coherent masters and slaves. The classification as master/slave also involves splitting the dual role port of the bus into a master and slave port and updating all the system assembly scripts to use the appropriate port. Similarly, the interrupt devices have to have their int_port split into a master and slave port. The intdev and its children have minimal changes to facilitate the extra port. Note that this patch does not enforce any port typing in the C++ world, it merely ensures that the Python objects have a notion of the port roles and are connected in an appropriate manner. This check is carried when two ports are connected, e.g. bus.master = memory.port. The following patches will make use of the classifications and specialise the C++ ports into masters and slaves.
59 lines
2.7 KiB
Python
59 lines
2.7 KiB
Python
# Copyright (c) 2006 The Regents of The University of Michigan
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are
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# met: redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer;
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# redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution;
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# neither the name of the copyright holders nor the names of its
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# contributors may be used to endorse or promote products derived from
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# this software without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#
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# Authors: Lisa Hsu
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import m5
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from m5.objects import *
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m5.util.addToPath('../configs/common')
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from FSConfig import *
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from Benchmarks import *
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test_sys = makeLinuxAlphaSystem('atomic',
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SysConfig('netperf-stream-client.rcS'))
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test_sys.cpu = AtomicSimpleCPU(cpu_id=0)
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test_sys.cpu.connectAllPorts(test_sys.membus)
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# In contrast to the other (one-system) Tsunami configurations we do
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# not have an IO cache but instead rely on an IO bridge for accesses
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# from masters on the IO bus to the memory bus
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test_sys.iobridge = Bridge(delay='50ns', nack_delay='4ns',
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ranges = [AddrRange(0, '8GB')])
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test_sys.iobridge.slave = test_sys.iobus.master
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test_sys.iobridge.master = test_sys.membus.slave
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drive_sys = makeLinuxAlphaSystem('atomic',
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SysConfig('netperf-server.rcS'))
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drive_sys.cpu = AtomicSimpleCPU(cpu_id=0)
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drive_sys.cpu.connectAllPorts(drive_sys.membus)
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drive_sys.iobridge = Bridge(delay='50ns', nack_delay='4ns',
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ranges = [AddrRange(0, '8GB')])
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drive_sys.iobridge.slave = drive_sys.iobus.master
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drive_sys.iobridge.master = drive_sys.membus.slave
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root = makeDualRoot(True, test_sys, drive_sys, "ethertrace")
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maxtick = 199999999
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