util/cpt_upgraders/arm-gem5-gic-ext.py

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  35
  36 def upgrader(cpt):
  37     """The gem5 GIC extensions change the size of many GIC data
  38     structures. Resize them to match the new GIC."""
  39
  40     import re
  41     if cpt.get('root','isa') != 'arm':
  42         return
  43
  44     old_cpu_max = 8
  45     new_cpu_max = 256
  46     sgi_max = 16
  47     ppi_max = 16
  48     per_cpu_regs = (
  49         ("iccrpr", [ "0xff", ]),
  50         ("cpuEnabled", [ "false", ]),
  51         ("cpuPriority", [ "0xff", ]),
  52         ("cpuBpr", [ "0", ]),
  53         ("cpuHighestInt", [ "1023", ]),
  54         ("cpuPpiPending", [ "0", ]),
  55         ("cpuPpiActive", [ "0", ] ),
  56         ("interrupt_time", [ "0", ]),
  57         ("*bankedIntPriority", ["0", ] * (sgi_max + ppi_max)),
  58     )
  59     new_per_cpu_regs = (
  60         ("cpuSgiPendingExt", "0"),
  61         ("cpuSgiActiveExt", "0"),
  62     )
  63
  64     for sec in cpt.sections():
  65         if re.search('.*\.gic$', sec):
  66             for reg, default in per_cpu_regs:
  67                 value = cpt.get(sec, reg).split(" ")
  68                 assert len(value) / len(default) == old_cpu_max, \
  69                     "GIC register size mismatch"
  70                 value += [ " ".join(default), ] * (new_cpu_max - old_cpu_max)
  71                 cpt.set(sec, reg, " ".join(value))
  72
  73             for reg, default in new_per_cpu_regs:
  74                 cpt.set(sec, reg, " ".join([ default, ] * new_cpu_max))