1# Copyright (c) 2015 ARM Limited
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22# this software without specific prior written permission.
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24# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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30# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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35#
36# Authors: Andreas Sandberg
37#
38
39def upgrader(cpt):
40    """The gem5 GIC extensions change the size of many GIC data
41    structures. Resize them to match the new GIC."""
42
43    import re
44    if cpt.get('root','isa') != 'arm':
45        return
46
47    old_cpu_max = 8
48    new_cpu_max = 256
49    sgi_max = 16
50    ppi_max = 16
51    per_cpu_regs = (
52        ("iccrpr", [ "0xff", ]),
53        ("cpuEnabled", [ "false", ]),
54        ("cpuPriority", [ "0xff", ]),
55        ("cpuBpr", [ "0", ]),
56        ("cpuHighestInt", [ "1023", ]),
57        ("cpuPpiPending", [ "0", ]),
58        ("cpuPpiActive", [ "0", ] ),
59        ("interrupt_time", [ "0", ]),
60        ("*bankedIntPriority", ["0", ] * (sgi_max + ppi_max)),
61    )
62    new_per_cpu_regs = (
63        ("cpuSgiPendingExt", "0"),
64        ("cpuSgiActiveExt", "0"),
65    )
66
67    for sec in cpt.sections():
68        if re.search('.*\.gic$', sec):
69            for reg, default in per_cpu_regs:
70                value = cpt.get(sec, reg).split(" ")
71                assert len(value) / len(default) == old_cpu_max, \
72                    "GIC register size mismatch"
73                value += [ " ".join(default), ] * (new_cpu_max - old_cpu_max)
74                cpt.set(sec, reg, " ".join(value))
75
76            for reg, default in new_per_cpu_regs:
77                cpt.set(sec, reg, " ".join([ default, ] * new_cpu_max))
78