bdb2820218
Change-Id: I0907a6f1ada3038305c2d83a350a8d435ac657ba Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/25403 Reviewed-by: Bobby R. Bruce <bbruce@ucdavis.edu> Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br> Maintainer: Bobby R. Bruce <bbruce@ucdavis.edu> Tested-by: kokoro <noreply+kokoro@google.com>
73 lines
3.8 KiB
Python
73 lines
3.8 KiB
Python
# Copyright (c) 2013-2015 ARM Limited
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# All rights reserved.
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#
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# The license below extends only to copyright in the software and shall
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# not be construed as granting a license to any other intellectual
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# property including but not limited to intellectual property relating
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# to a hardware implementation of the functionality of the software
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# licensed hereunder. You may use the software subject to the license
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# terms below provided that you ensure that this notice is replicated
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# unmodified and in its entirety in all distributions of the software,
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# modified or unmodified, in source code or in binary form.
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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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from m5.params import *
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from m5.proxy import *
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from m5.objects.AbstractNVM import *
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#Distribution of the data.
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#sequential: sequential (address n+1 is likely to be on the same plane as n)
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#Random: @TODO Not yet implemented
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#stripe: striping over all the planes
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class DataDistribution(Enum): vals = ['sequential', 'stripe']
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class FlashDevice(AbstractNVM):
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type = 'FlashDevice'
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cxx_header = "dev/arm/flash_device.hh"
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# default blocksize is 128 kB.This seems to be the most common size in
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# mobile devices (not the image blocksize)
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blk_size = Param.MemorySize("128kB", "Size of one disk block")
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# disk page size is 2 kB. This is the most commonly used page size in
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# flash devices
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page_size = Param.MemorySize("2kB", "Size of one disk page")
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# There are many GC flavors. It is impossible to cover them all; this
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# parameter enables the approximation of different GC algorithms
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GC_active = Param.Percent(50, "Percentage of the time (in whole numbers) \
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that the GC is activated if a block is full")
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# Access latencies. Different devices will have different latencies, but
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# the latencies will be around the default values.
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read_lat = Param.Latency("25us", "Read Latency")
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write_lat = Param.Latency("200us", "Write Latency")
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erase_lat = Param.Latency("1500us", "Erase Delay")
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# Number of planes ought to be a power of two according to ONFI standard
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num_planes = Param.UInt32(1, "Number of planes per die")
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# Data distribution. Default is none. It is adviced to switch to stripe
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# when more than one plane is used.
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data_distribution = Param.DataDistribution('sequential', "Distribution \
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of the data in the adress table; Stripe needed for multiple\
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planes; otherwise use: sequential")
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