1 files changed, 71 insertions, 0 deletions
diff --git a/src/dev/Device.py b/src/dev/Device.py
new file mode 100644
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--- /dev/null
+++ b/src/dev/Device.py
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+# Copyright (c) 2005-2007 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,
+# 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: Nathan Binkert
+
+from m5.params import *
+from m5.proxy import *
+from MemObject import MemObject
+
+class PioDevice(MemObject):
+    type = 'PioDevice'
+    abstract = True
+    pio = Port("Programmed I/O port")
+    platform = Param.Platform(Parent.any, "Platform this device is part of")
+    system = Param.System(Parent.any, "System this device is part of")
+
+class BasicPioDevice(PioDevice):
+    type = 'BasicPioDevice'
+    abstract = True
+    pio_addr = Param.Addr("Device Address")
+    pio_latency = Param.Latency('1ns', "Programmed IO latency in simticks")
+
+class DmaDevice(PioDevice):
+    type = 'DmaDevice'
+    abstract = True
+    dma = Port(Self.pio.peerObj.port, "DMA port")
+    min_backoff_delay = Param.Latency('4ns',
+      "min time between a nack packet being received and the next request made by the device")
+    max_backoff_delay = Param.Latency('10us',
+      "max time between a nack packet being received and the next request made by the device")
+
+
+
+class IsaFake(BasicPioDevice):
+    type = 'IsaFake'
+    pio_size = Param.Addr(0x8, "Size of address range")
+    ret_data8 = Param.UInt8(0xFF, "Default data to return")
+    ret_data16 = Param.UInt16(0xFFFF, "Default data to return")
+    ret_data32 = Param.UInt32(0xFFFFFFFF, "Default data to return")
+    ret_data64 = Param.UInt64(0xFFFFFFFFFFFFFFFF, "Default data to return")
+    ret_bad_addr = Param.Bool(False, "Return pkt status bad address on access")
+    update_data = Param.Bool(False, "Update the data that is returned on writes")
+    warn_access = Param.String("", "String to print when device is accessed")
+
+class BadAddr(IsaFake):
+    ret_bad_addr = Param.Bool(True, "Return pkt status bad address on access")
+
+