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# -*- coding: utf-8 -*-
#
# AWL simulator - Debug hardware interface
#
# Copyright 2013-2016 Michael Buesch <m@bues.ch>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
from __future__ import division, absolute_import, print_function, unicode_literals
from awlsim.common.compat import *
from awlsim.core.hardware import *
from awlsim.core.operators import AwlOperator
from awlsim.core.datatypes import AwlOffset
class HardwareInterface(AbstractHardwareInterface):
name = "debug"
paramDescs = [
HwParamDesc_bool("dummyParam",
description = "Unused dummy parameter"),
HwParamDesc_int("startupErrorRate",
defaultValue = 0,
minValue = 0,
description = "Error rate in startup (0 = none)"),
HwParamDesc_int("shutdownErrorRate",
defaultValue = 0,
minValue = 0,
description = "Error rate in shutdown (0 = none)"),
HwParamDesc_int("inputErrorRate",
defaultValue = 0,
minValue = 0,
description = "Error rate in input read (0 = none)"),
HwParamDesc_int("outputErrorRate",
defaultValue = 0,
minValue = 0,
description = "Error rate in output write (0 = none)"),
HwParamDesc_int("directReadErrorRate",
defaultValue = 0,
minValue = 0,
description = "Error rate in direct input read (0 = none)"),
HwParamDesc_int("directWriteErrorRate",
defaultValue = 0,
minValue = 0,
description = "Error rate in direct output write (0 = none)"),
]
def __init__(self, sim, parameters={}):
AbstractHardwareInterface.__init__(self,
sim = sim,
parameters = parameters)
self.__startupErrorRate = self.getParamValueByName("startupErrorRate")
self.__startupErrorCount = 0
self.__shutdownErrorRate = self.getParamValueByName("shutdownErrorRate")
self.__shutdownErrorCount = 0
self.__inputErrorRate = self.getParamValueByName("inputErrorRate")
self.__inputErrorCount = 0
self.__outputErrorRate = self.getParamValueByName("outputErrorRate")
self.__outputErrorCount = 0
self.__directReadErrorRate = self.getParamValueByName("directReadErrorRate")
self.__directReadErrorCount = 0
self.__directWriteErrorRate = self.getParamValueByName("directWriteErrorRate")
self.__directWriteErrorCount = 0
def doStartup(self):
if self.__startupErrorRate:
self.__startupErrorCount += 1
if self.__startupErrorCount % self.__startupErrorRate == 0:
self.raiseException("Synthetic startup error")
def doShutdown(self):
if self.__shutdownErrorRate:
self.__shutdownErrorCount += 1
if self.__shutdownErrorCount % self.__shutdownErrorRate == 0:
self.raiseException("Synthetic shutdown error")
def readInputs(self):
if self.__inputErrorRate:
self.__inputErrorCount += 1
if self.__inputErrorCount % self.__inputErrorRate == 0:
self.raiseException("Synthetic input error")
# Get the first input dword and write it back.
dword = self.sim.cpu.fetch(AwlOperator(AwlOperator.MEM_E,
32,
AwlOffset(self.inputAddressBase)))
dwordBytes = bytearray( ( ((dword >> 24) & 0xFF),
((dword >> 16) & 0xFF),
((dword >> 8) & 0xFF),
(dword & 0xFF) ) )
self.sim.cpu.storeInputRange(self.inputAddressBase,
dwordBytes)
def writeOutputs(self):
if self.__outputErrorRate:
self.__outputErrorCount += 1
if self.__outputErrorCount % self.__outputErrorRate == 0:
self.raiseException("Synthetic output error")
# Fetch a data range, but don't do anything with it.
outData = self.sim.cpu.fetchOutputRange(self.outputAddressBase,
512)
assert(outData)
def directReadInput(self, accessWidth, accessOffset):
if accessOffset < self.inputAddressBase:
return None
if self.__directReadErrorRate:
self.__directReadErrorCount += 1
if self.__directReadErrorCount % self.__directReadErrorRate == 0:
self.raiseException("Synthetic directRead error")
# Just read the current value from the CPU and return it.
return self.sim.cpu.fetch(AwlOperator(AwlOperator.MEM_E,
accessWidth,
AwlOffset(accessOffset)))
def directWriteOutput(self, accessWidth, accessOffset, data):
if accessOffset < self.outputAddressBase:
return False
if self.__directWriteErrorRate:
self.__directWriteErrorCount += 1
if self.__directWriteErrorCount % self.__directWriteErrorRate == 0:
self.raiseException("Synthetic directWrite error")
# Just pretend we wrote it somewhere.
return True
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