src/mem/CfiMemory.py

# Copyright (c) 2012-2013, 2021 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) 2005-2008 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.

from m5.params import *
from m5.objects.AbstractMemory import AbstractMemory
from m5.util.fdthelper import FdtNode, FdtPropertyWords

class CfiMemory(AbstractMemory):
    type = 'CfiMemory'
    cxx_header = "mem/cfi_mem.hh"
    cxx_class = 'gem5::memory::CfiMemory'

    port = ResponsePort("Response port")

    latency = Param.Latency('30ns', "Request to response latency")
    latency_var = Param.Latency('0ns', "Request to response latency variance")
    # The memory bandwidth limit default is set to 12.8GB/s which is
    # representative of a x64 DDR3-1600 channel.
    bandwidth = Param.MemoryBandwidth('12.8GB/s',
                                      "Combined read and write bandwidth")

    vendor_id = Param.UInt16(0, "vendor ID")
    device_id = Param.UInt16(0, "device ID")

    blk_size = Param.UInt32(64 * 1024, "Block size in bytes")

    bank_width = Param.UInt16(4, "width in bytes of flash interface")