util/cpt_upgraders/isa-is-simobject.py

   1 # The ISA is now a separate SimObject, which means that we serialize
   2 # it in a separate section instead of as a part of the ThreadContext.
   3 def upgrader(cpt):
   4     isa = cpt.get('root','isa')
   5     isa_fields = {
   6         "alpha" : ( "fpcr", "uniq", "lock_flag", "lock_addr", "ipr" ),
   7         "arm" : ( "miscRegs" ),
   8         "sparc" : ( "asi", "tick", "fprs", "gsr", "softint", "tick_cmpr",
   9                     "stick", "stick_cmpr", "tpc", "tnpc", "tstate", "tt",
  10                     "tba", "pstate", "tl", "pil", "cwp", "gl", "hpstate",
  11                     "htstate", "hintp", "htba", "hstick_cmpr",
  12                     "strandStatusReg", "fsr", "priContext", "secContext",
  13                     "partId", "lsuCtrlReg", "scratchPad",
  14                     "cpu_mondo_head", "cpu_mondo_tail",
  15                     "dev_mondo_head", "dev_mondo_tail",
  16                     "res_error_head", "res_error_tail",
  17                     "nres_error_head", "nres_error_tail",
  18                     "tick_intr_sched",
  19                     "cpu", "tc_num", "tick_cmp", "stick_cmp", "hstick_cmp"),
  20         "x86" : ( "regVal" ),
  21         }
  22
  23     isa_fields = isa_fields.get(isa, [])
  24     isa_sections = []
  25     for sec in cpt.sections():
  26         import re
  27
  28         re_cpu_match = re.match('^(.*sys.*\.cpu[^.]*)\.xc\.(.+)$', sec)
  29         # Search for all the execution contexts
  30         if not re_cpu_match:
  31             continue
  32
  33         if re_cpu_match.group(2) != "0":
  34             # This shouldn't happen as we didn't support checkpointing
  35             # of in-order and O3 CPUs.
  36             raise ValueError("Don't know how to migrate multi-threaded CPUs "
  37                              "from version 1")
  38
  39         isa_section = []
  40         for fspec in isa_fields:
  41             for (key, value) in cpt.items(sec, raw=True):
  42                 if key in isa_fields:
  43                     isa_section.append((key, value))
  44
  45         name = "%s.isa" % re_cpu_match.group(1)
  46         isa_sections.append((name, isa_section))
  47
  48         for (key, value) in isa_section:
  49             cpt.remove_option(sec, key)
  50
  51     for (sec, options) in isa_sections:
  52         # Some intermediate versions of gem5 have empty ISA sections
  53         # (after we made the ISA a SimObject, but before we started to
  54         # serialize into a separate ISA section).
  55         if not cpt.has_section(sec):
  56             cpt.add_section(sec)
  57         else:
  58             if cpt.items(sec):
  59                 raise ValueError("Unexpected populated ISA section in old "
  60                                  "checkpoint")
  61
  62         for (key, value) in options:
  63             cpt.set(sec, key, value)
  64
  65 legacy_version = 4