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https://github.com/projectacrn/acrn-hypervisor.git
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3bcb3146ad
This patch refines the AML parser to improve its readability and
performance in the following ways.
1. A Tree object now has the parts of the corresponding object being
member fields. As an example, a Tree with label `DefMethod` now has
members `NameString`, `MethodFlags` and `TermList`.
2. It is now possible to assign names each part of an object. The grammar
is updated to assign different names to the parts with the same type
in the same object.
3. Invocation to intermediate factories is now skipped. As an example,
when parsing a ByteConst that acts as a ByteIndex, the original
implementation invokes the following factories in sequence:
ByteIndex -> TermArg -> DataObject -> ComputationalData -> ByteConst
The factories TermArg, DataObject and ComputationalData does nothing
but forward the parsing to the next-level factory according to the
opcode of the next object. With this patch, the invocation sequence
becomes:
ByteIndex -> ByteConst
i.e. ByteIndex directly passes to ByteConst which can parse the next
opcode.
Tracked-On: #6298
Signed-off-by: Junjie Mao <junjie.mao@intel.com>
42 lines
1.3 KiB
Python
42 lines
1.3 KiB
Python
# Copyright (C) 2021 Intel Corporation. All rights reserved.
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#
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# SPDX-License-Identifier: BSD-3-Clause
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#
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import os
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import logging
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from acpiparser.aml.stream import Stream
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from acpiparser.aml.parser import AMLCode, DeferredExpansion
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from acpiparser.aml.tree import Tree
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from acpiparser.aml.context import Context
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from acpiparser.aml.interpreter import ConcreteInterpreter
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from acpiparser.aml.visitors import ConditionallyUnregisterSymbolVisitor
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def DSDT(val):
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table_dir = os.path.dirname(val)
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if not table_dir:
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table_dir = "."
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ssdt = filter(lambda x: x.startswith("SSDT"), os.listdir(table_dir))
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tables = [val] + list(map(lambda x: os.path.join(table_dir, x), ssdt))
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context = Context()
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trees = []
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try:
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for t in tables:
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logging.info(f"Loading {t}")
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context.switch_stream(t)
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tree = Tree()
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AMLCode.parse(context, tree)
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tree = DeferredExpansion(context).transform_topdown(tree)
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trees.append(tree)
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except Exception as e:
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context.current_stream.dump()
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raise
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context.skip_external_on_lookup()
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visitor = ConditionallyUnregisterSymbolVisitor(ConcreteInterpreter(context))
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for tree in trees:
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visitor.visit_topdown(tree)
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return context
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