src/cpu/testers/memtest/MemTest.py

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from m5.params import *
from m5.proxy import *

from m5.objects.ClockedObject import ClockedObject

class MemTest(ClockedObject):
    type = 'MemTest'
    cxx_header = "cpu/testers/memtest/memtest.hh"
    cxx_class = 'gem5::MemTest'

    # Interval of packet injection, the size of the memory range
    # touched, and an optional stop condition
    interval = Param.Cycles(1, "Interval between request packets")
    size = Param.Unsigned(65536, "Size of memory region to use (bytes)")
    base_addr_1 = Param.Addr(0x100000, "Start of the first testing region")
    base_addr_2 = Param.Addr(0x400000, "Start of the second testing region")
    uncacheable_base_addr = Param.Addr(
        0x800000, "Start of the uncacheable testing region")
    max_loads = Param.Counter(0, "Number of loads to execute before exiting")

    # Control the mix of packets and if functional accesses are part of
    # the mix or not
    percent_reads = Param.Percent(65, "Percentage reads")
    percent_functional = Param.Percent(50, "Percentage functional accesses")
    percent_uncacheable = Param.Percent(10, "Percentage uncacheable")

    # Determine how often to print progress messages and what timeout
    # to use for checking progress of both requests and responses
    progress_interval = Param.Counter(1000000,
        "Progress report interval (in accesses)")
    progress_check = Param.Cycles(5000000, "Cycles before exiting " \
                                      "due to lack of progress")

    port = RequestPort("Port to the memory system")
    system = Param.System(Parent.any, "System this tester is part of")

    # Add the ability to supress error responses on functional
    # accesses as Ruby needs this
    suppress_func_errors = Param.Bool(False, "Suppress panic when "\
                                            "functional accesses fail.")