CopyEngine: Implement a I/OAT-like copy engine.

src/dev/CopyEngine.py

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+# Copyright (c) 2008 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,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#
+# Authors: Ali Saidi
+
+from m5.SimObject import SimObject
+from m5.params import *
+from m5.proxy import *
+from Pci import PciDevice
+
+class CopyEngine(PciDevice):
+    type = 'CopyEngine'
+    VendorID = 0x8086
+    DeviceID = 0x1a38
+    Revision = 0xA2 # CM2 stepping (newest listed)
+    SubsystemID = 0
+    SubsystemVendorID = 0
+    Status = 0x0000
+    SubClassCode = 0x08
+    ClassCode = 0x80
+    ProgIF = 0x00
+    MaximumLatency = 0x00
+    MinimumGrant = 0xff
+    InterruptLine = 0x20
+    InterruptPin = 0x01
+    BAR0Size = '1kB'
+
+    ChanCnt = Param.UInt8(4, "Number of DMA channels that exist on device")
+    XferCap = Param.MemorySize('4kB', "Number of bits of transfer size that are supported")
+
+
+    clock = Param.Clock('500MHz', "Clock speed of the device")
+    latBeforeBegin = Param.Latency('20ns', "Latency after a DMA command is seen before it's proccessed")
+    latAfterCompletion = Param.Latency('20ns', "Latency after a DMA command is complete before it's reported as such")
+
+