TraceCPU.py revision 13665:9c7fe3811b88 
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36# Authors: Radhika Jagtap
37#          Andreas Hansson
38#          Thomas Grass
39
40from m5.params import *
41from m5.objects.BaseCPU import BaseCPU
42
43class TraceCPU(BaseCPU):
44    """Trace CPU model which replays traces generated in a prior simulation
45     using DerivO3CPU or its derived classes. It interfaces with L1 caches.
46    """
47    type = 'TraceCPU'
48    cxx_header = "cpu/trace/trace_cpu.hh"
49
50    @classmethod
51    def memory_mode(cls):
52        return 'timing'
53
54    @classmethod
55    def require_caches(cls):
56        return True
57
58    def addPMU(self, pmu = None):
59        pass
60
61    @classmethod
62    def support_take_over(cls):
63        return True
64
65    instTraceFile = Param.String("", "Instruction trace file")
66    dataTraceFile = Param.String("", "Data dependency trace file")
67    sizeStoreBuffer = Param.Unsigned(16, "Number of entries in the store "\
68        "buffer")
69    sizeLoadBuffer = Param.Unsigned(16, "Number of entries in the load buffer")
70    sizeROB =  Param.Unsigned(40, "Number of entries in the re-order buffer")
71
72    # Frequency multiplier used to effectively scale the Trace CPU frequency
73    # either up or down. Note that the Trace CPU's clock domain must also be
74    # changed when frequency is scaled. A default value of 1.0 means the same
75    # frequency as was used for generating the traces.
76    freqMultiplier = Param.Float(1.0, "Multiplier scale the Trace CPU "\
77                                 "frequency up or down")
78
79    # Enable exiting when any one Trace CPU completes execution which is set to
80    # false by default
81    enableEarlyExit = Param.Bool(False, "Exit when any one Trace CPU "\
82                                 "completes execution")
83
84    # If progress msg interval is set to a non-zero value, it is treated as
85    # the interval of committed instructions at which an info message is
86    # printed.
87    progressMsgInterval = Param.Unsigned(0, "Interval of committed "\
88                                         "instructions at which to print a"\
89                                         " progress msg")
90