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# Copyright (c) 2012-2016 ARM Limited
# All rights reserved.
#
# The license below extends only to copyright in the software and shall
# not be construed as granting a license to any other intellectual
# property including but not limited to intellectual property relating
# to a hardware implementation of the functionality of the software
# licensed hereunder. You may use the software subject to the license
# terms below provided that you ensure that this notice is replicated
# unmodified and in its entirety in all distributions of the software,
# modified or unmodified, in source code or in binary form.
#
# 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
# Glenn Bergmans
from m5.params import *
from m5.proxy import *
from m5.util.fdthelper import *
from m5.objects.ClockedObject import ClockedObject
class PioDevice(ClockedObject):
type = 'PioDevice'
cxx_header = "dev/io_device.hh"
abstract = True
pio = SlavePort("Programmed I/O port")
system = Param.System(Parent.any, "System this device is part of")
def generateBasicPioDeviceNode(self, state, name, pio_addr,
size, interrupts = None):
node = FdtNode("%s@%x" % (name, long(pio_addr)))
node.append(FdtPropertyWords("reg",
state.addrCells(pio_addr) +
state.sizeCells(size) ))
if interrupts:
if any([i < 32 for i in interrupts]):
raise(("Interrupt number smaller than 32 "+
" in PioDevice %s") % name)
# subtracting 32 because Linux assumes that SPIs start at 0, while
# gem5 uses the internal GIC numbering (SPIs start at 32)
node.append(FdtPropertyWords("interrupts", sum(
[[0, i - 32, 4] for i in interrupts], []) ))
return node
class BasicPioDevice(PioDevice):
type = 'BasicPioDevice'
cxx_header = "dev/io_device.hh"
abstract = True
pio_addr = Param.Addr("Device Address")
pio_latency = Param.Latency('100ns', "Programmed IO latency")
class DmaDevice(PioDevice):
type = 'DmaDevice'
cxx_header = "dev/dma_device.hh"
abstract = True
dma = MasterPort("DMA port")
sid = Param.Unsigned(0,
"Stream identifier used by an IOMMU to distinguish amongst "
"several devices attached to it")
ssid = Param.Unsigned(0,
"Substream identifier used by an IOMMU to distinguish amongst "
"several devices attached to it")
class IsaFake(BasicPioDevice):
type = 'IsaFake'
cxx_header = "dev/isa_fake.hh"
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")
fake_mem = Param.Bool(False,
"Is this device acting like a memory and thus may get a cache line sized req")
class BadAddr(IsaFake):
pio_addr = 0
ret_bad_addr = Param.Bool(True, "Return pkt status bad address on access")
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