70 lines
2.4 KiB
Python
70 lines
2.4 KiB
Python
# MIT License
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#
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# Copyright (c) 2023 Neil Webber
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#
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files (the "Software"), to deal
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# in the Software without restriction, including without limitation the rights
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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# copies of the Software, and to permit persons to whom the Software is
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# furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in
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# all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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# SOFTWARE.
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# exceptions representing processor traps
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from types import SimpleNamespace
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class PDPTrap(Exception):
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vector = -1
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def __init__(self, cpuerr=0, **kwargs):
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# if specified, the cpuerr bit(s) will be OR'd into
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# the CPU Error Register when the trap is processed by go_trap
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self.cpuerr = cpuerr
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# any additional arguments that are specific per-trap info
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# simply get stored as-is
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self.trapinfo = kwargs
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def __str__(self):
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s = self.__class__.__name__ + "("
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s += f"vector={oct(self.vector)}"
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if self.cpuerr:
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s += f", cpuerr={oct(self.cpuerr)}"
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if self.trapinfo:
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s += f", {self.trapinfo=}"
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s += ")"
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return s
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# rather than copy/pasta the above class, they are made this way
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# It's not clear this is much better
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# XXX the for/setattr loop instead of a dict() in SimpleNamespace
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# only because it seems to be more readable this way
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PDPTraps = SimpleNamespace()
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for __nm, __v in (
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('AddressError', 0o004),
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('ReservedInstruction', 0o010),
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('BPT', 0o014),
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('IOT', 0o20),
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('PowerFail', 0o24),
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('EMT', 0o30),
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('TRAP', 0o34),
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('Parity', 0o114),
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('PIRQ', 0o240),
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('FloatingPoint', 0o244),
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('MMU', 0o250)):
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setattr(PDPTraps, __nm, type(__nm, (PDPTrap,), dict(vector=__v)))
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