82f5181777
The Kconfig files were generated mostly with this script:
for i in `grep -ho CONFIG_[A-Z0-9_]* default-configs/* | sort -u`; do
set fnord `git grep -lw $i -- 'hw/*/Makefile.objs' `
shift
if test $# = 1; then
cat >> $(dirname $1)/Kconfig << EOF
config ${i#CONFIG_}
bool
EOF
git add $(dirname $1)/Kconfig
else
echo $i $*
fi
done
sed -i '$d' hw/*/Kconfig
for i in hw/*; do
if test -d $i && ! test -f $i/Kconfig; then
touch $i/Kconfig
git add $i/Kconfig
fi
done
Whenever a symbol is referenced from multiple subdirectories, the
script prints the list of directories that reference the symbol.
These symbols have to be added manually to the Kconfig files.
Kconfig.host and hw/Kconfig were created manually.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Yang Zhong <yang.zhong@intel.com>
Message-Id: <20190123065618.3520-27-yang.zhong@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
680 lines
22 KiB
Python
680 lines
22 KiB
Python
#
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# Mini-Kconfig parser
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#
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# Copyright (c) 2015 Red Hat Inc.
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#
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# Authors:
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# Paolo Bonzini <pbonzini@redhat.com>
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#
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# This work is licensed under the terms of the GNU GPL, version 2
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# or, at your option, any later version. See the COPYING file in
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# the top-level directory.
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from __future__ import print_function
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import os
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import sys
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import re
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__all__ = [ 'KconfigDataError', 'KconfigParserError',
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'KconfigData', 'KconfigParser' ]
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def debug_print(*args):
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#print('# ' + (' '.join(str(x) for x in args)))
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pass
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# -------------------------------------------
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# KconfigData implements the Kconfig semantics. For now it can only
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# detect undefined symbols, i.e. symbols that were referenced in
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# assignments or dependencies but were not declared with "config FOO".
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#
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# Semantic actions are represented by methods called do_*. The do_var
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# method return the semantic value of a variable (which right now is
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# just its name).
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# -------------------------------------------
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class KconfigDataError(Exception):
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def __init__(self, msg):
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self.msg = msg
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def __str__(self):
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return self.msg
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class KconfigData:
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class Expr:
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def __and__(self, rhs):
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return KconfigData.AND(self, rhs)
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def __or__(self, rhs):
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return KconfigData.OR(self, rhs)
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def __invert__(self):
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return KconfigData.NOT(self)
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# Abstract methods
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def add_edges_to(self, var):
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pass
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def evaluate(self):
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assert False
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class AND(Expr):
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def __init__(self, lhs, rhs):
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self.lhs = lhs
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self.rhs = rhs
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def __str__(self):
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return "(%s && %s)" % (self.lhs, self.rhs)
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def add_edges_to(self, var):
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self.lhs.add_edges_to(var)
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self.rhs.add_edges_to(var)
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def evaluate(self):
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return self.lhs.evaluate() and self.rhs.evaluate()
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class OR(Expr):
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def __init__(self, lhs, rhs):
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self.lhs = lhs
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self.rhs = rhs
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def __str__(self):
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return "(%s || %s)" % (self.lhs, self.rhs)
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def add_edges_to(self, var):
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self.lhs.add_edges_to(var)
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self.rhs.add_edges_to(var)
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def evaluate(self):
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return self.lhs.evaluate() or self.rhs.evaluate()
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class NOT(Expr):
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def __init__(self, lhs):
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self.lhs = lhs
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def __str__(self):
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return "!%s" % (self.lhs)
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def add_edges_to(self, var):
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self.lhs.add_edges_to(var)
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def evaluate(self):
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return not self.lhs.evaluate()
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class Var(Expr):
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def __init__(self, name):
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self.name = name
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self.value = None
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self.outgoing = set()
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self.clauses_for_var = list()
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def __str__(self):
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return self.name
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def has_value(self):
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return not (self.value is None)
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def set_value(self, val, clause):
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self.clauses_for_var.append(clause)
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if self.has_value() and self.value != val:
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print("The following clauses were found for " + self.name)
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for i in self.clauses_for_var:
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print(" " + str(i), file=sys.stderr)
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raise KconfigDataError('contradiction between clauses when setting %s' % self)
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debug_print("=> %s is now %s" % (self.name, val))
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self.value = val
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# depth first search of the dependency graph
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def dfs(self, visited, f):
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if self in visited:
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return
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visited.add(self)
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for v in self.outgoing:
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v.dfs(visited, f)
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f(self)
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def add_edges_to(self, var):
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self.outgoing.add(var)
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def evaluate(self):
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if not self.has_value():
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raise KconfigDataError('cycle found including %s' % self)
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return self.value
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class Clause:
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def __init__(self, dest):
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self.dest = dest
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def priority(self):
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return 0
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def process(self):
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pass
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class AssignmentClause(Clause):
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def __init__(self, dest, value):
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KconfigData.Clause.__init__(self, dest)
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self.value = value
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def __str__(self):
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return "CONFIG_%s=%s" % (self.dest, 'y' if self.value else 'n')
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def process(self):
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self.dest.set_value(self.value, self)
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class DefaultClause(Clause):
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def __init__(self, dest, value, cond=None):
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KconfigData.Clause.__init__(self, dest)
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self.value = value
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self.cond = cond
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if not (self.cond is None):
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self.cond.add_edges_to(self.dest)
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def __str__(self):
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value = 'y' if self.value else 'n'
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if self.cond is None:
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return "config %s default %s" % (self.dest, value)
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else:
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return "config %s default %s if %s" % (self.dest, value, self.cond)
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def priority(self):
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# Defaults are processed just before leaving the variable
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return -1
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def process(self):
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if not self.dest.has_value() and \
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(self.cond is None or self.cond.evaluate()):
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self.dest.set_value(self.value, self)
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class DependsOnClause(Clause):
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def __init__(self, dest, expr):
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KconfigData.Clause.__init__(self, dest)
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self.expr = expr
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self.expr.add_edges_to(self.dest)
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def __str__(self):
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return "config %s depends on %s" % (self.dest, self.expr)
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def process(self):
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if not self.expr.evaluate():
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self.dest.set_value(False, self)
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class SelectClause(Clause):
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def __init__(self, dest, cond):
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KconfigData.Clause.__init__(self, dest)
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self.cond = cond
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self.cond.add_edges_to(self.dest)
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def __str__(self):
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return "select %s if %s" % (self.dest, self.cond)
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def process(self):
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if self.cond.evaluate():
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self.dest.set_value(True, self)
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def __init__(self):
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self.previously_included = []
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self.incl_info = None
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self.defined_vars = set()
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self.referenced_vars = dict()
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self.clauses = list()
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# semantic analysis -------------
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def check_undefined(self):
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undef = False
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for i in self.referenced_vars:
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if not (i in self.defined_vars):
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print("undefined symbol %s" % (i), file=sys.stderr)
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undef = True
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return undef
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def compute_config(self):
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if self.check_undefined():
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raise KconfigDataError("there were undefined symbols")
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return None
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debug_print("Input:")
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for clause in self.clauses:
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debug_print(clause)
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debug_print("\nDependency graph:")
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for i in self.referenced_vars:
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debug_print(i, "->", [str(x) for x in self.referenced_vars[i].outgoing])
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# The reverse of the depth-first order is the topological sort
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dfo = dict()
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visited = set()
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debug_print("\n")
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def visit_fn(var):
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debug_print(var, "has DFS number", len(dfo))
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dfo[var] = len(dfo)
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for name, v in self.referenced_vars.items():
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self.do_default(v, False)
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v.dfs(visited, visit_fn)
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# Put higher DFS numbers and higher priorities first. This
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# places the clauses in topological order and places defaults
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# after assignments and dependencies.
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self.clauses.sort(key=lambda x: (-dfo[x.dest], -x.priority()))
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debug_print("\nSorted clauses:")
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for clause in self.clauses:
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debug_print(clause)
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clause.process()
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debug_print("")
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values = dict()
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for name, v in self.referenced_vars.items():
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debug_print("Evaluating", name)
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values[name] = v.evaluate()
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return values
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# semantic actions -------------
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def do_declaration(self, var):
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if (var in self.defined_vars):
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raise KconfigDataError('variable "' + var + '" defined twice')
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self.defined_vars.add(var.name)
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# var is a string with the variable's name.
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def do_var(self, var):
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if (var in self.referenced_vars):
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return self.referenced_vars[var]
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var_obj = self.referenced_vars[var] = KconfigData.Var(var)
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return var_obj
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def do_assignment(self, var, val):
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self.clauses.append(KconfigData.AssignmentClause(var, val))
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def do_default(self, var, val, cond=None):
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self.clauses.append(KconfigData.DefaultClause(var, val, cond))
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def do_depends_on(self, var, expr):
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self.clauses.append(KconfigData.DependsOnClause(var, expr))
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def do_select(self, var, symbol, cond=None):
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cond = (cond & var) if cond is not None else var
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self.clauses.append(KconfigData.SelectClause(symbol, cond))
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def do_imply(self, var, symbol, cond=None):
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# "config X imply Y [if COND]" is the same as
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# "config Y default y if X [&& COND]"
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cond = (cond & var) if cond is not None else var
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self.do_default(symbol, True, cond)
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# -------------------------------------------
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# KconfigParser implements a recursive descent parser for (simplified)
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# Kconfig syntax.
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# -------------------------------------------
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# tokens table
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TOKENS = {}
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TOK_NONE = -1
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TOK_LPAREN = 0; TOKENS[TOK_LPAREN] = '"("';
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TOK_RPAREN = 1; TOKENS[TOK_RPAREN] = '")"';
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TOK_EQUAL = 2; TOKENS[TOK_EQUAL] = '"="';
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TOK_AND = 3; TOKENS[TOK_AND] = '"&&"';
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TOK_OR = 4; TOKENS[TOK_OR] = '"||"';
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TOK_NOT = 5; TOKENS[TOK_NOT] = '"!"';
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TOK_DEPENDS = 6; TOKENS[TOK_DEPENDS] = '"depends"';
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TOK_ON = 7; TOKENS[TOK_ON] = '"on"';
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TOK_SELECT = 8; TOKENS[TOK_SELECT] = '"select"';
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TOK_IMPLY = 9; TOKENS[TOK_IMPLY] = '"imply"';
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TOK_CONFIG = 10; TOKENS[TOK_CONFIG] = '"config"';
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TOK_DEFAULT = 11; TOKENS[TOK_DEFAULT] = '"default"';
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TOK_Y = 12; TOKENS[TOK_Y] = '"y"';
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TOK_N = 13; TOKENS[TOK_N] = '"n"';
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TOK_SOURCE = 14; TOKENS[TOK_SOURCE] = '"source"';
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TOK_BOOL = 15; TOKENS[TOK_BOOL] = '"bool"';
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TOK_IF = 16; TOKENS[TOK_IF] = '"if"';
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TOK_ID = 17; TOKENS[TOK_ID] = 'identifier';
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TOK_EOF = 18; TOKENS[TOK_EOF] = 'end of file';
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class KconfigParserError(Exception):
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def __init__(self, parser, msg, tok=None):
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self.loc = parser.location()
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tok = tok or parser.tok
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if tok != TOK_NONE:
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location = TOKENS.get(tok, None) or ('"%s"' % tok)
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msg = '%s before %s' % (msg, location)
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self.msg = msg
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def __str__(self):
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return "%s: %s" % (self.loc, self.msg)
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class KconfigParser:
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@classmethod
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def parse(self, fp):
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data = KconfigData()
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parser = KconfigParser(data)
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parser.parse_file(fp)
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return data
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def __init__(self, data):
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self.data = data
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def parse_file(self, fp):
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self.abs_fname = os.path.abspath(fp.name)
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self.fname = fp.name
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self.data.previously_included.append(self.abs_fname)
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self.src = fp.read()
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if self.src == '' or self.src[-1] != '\n':
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self.src += '\n'
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self.cursor = 0
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self.line = 1
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self.line_pos = 0
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self.get_token()
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self.parse_config()
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def do_assignment(self, var, val):
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if not var.startswith("CONFIG_"):
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raise Error('assigned variable should start with CONFIG_')
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var = self.data.do_var(var[7:])
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self.data.do_assignment(var, val)
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# file management -----
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def error_path(self):
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inf = self.data.incl_info
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res = ""
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while inf:
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res = ("In file included from %s:%d:\n" % (inf['file'],
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inf['line'])) + res
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inf = inf['parent']
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return res
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def location(self):
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col = 1
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for ch in self.src[self.line_pos:self.pos]:
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if ch == '\t':
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col += 8 - ((col - 1) % 8)
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else:
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col += 1
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return '%s%s:%d:%d' %(self.error_path(), self.fname, self.line, col)
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def do_include(self, include):
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incl_abs_fname = os.path.join(os.path.dirname(self.abs_fname),
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include)
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# catch inclusion cycle
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inf = self.data.incl_info
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while inf:
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if incl_abs_fname == os.path.abspath(inf['file']):
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raise KconfigParserError(self, "Inclusion loop for %s"
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% include)
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inf = inf['parent']
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# skip multiple include of the same file
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if incl_abs_fname in self.data.previously_included:
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return
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try:
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fp = open(incl_abs_fname, 'r')
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except IOError as e:
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raise KconfigParserError(self,
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'%s: %s' % (e.strerror, include))
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inf = self.data.incl_info
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self.data.incl_info = { 'file': self.fname, 'line': self.line,
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'parent': inf }
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KconfigParser(self.data).parse_file(fp)
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self.data.incl_info = inf
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# recursive descent parser -----
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# y_or_n: Y | N
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def parse_y_or_n(self):
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if self.tok == TOK_Y:
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self.get_token()
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return True
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if self.tok == TOK_N:
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self.get_token()
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return False
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raise KconfigParserError(self, 'Expected "y" or "n"')
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# var: ID
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def parse_var(self):
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if self.tok == TOK_ID:
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val = self.val
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self.get_token()
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return self.data.do_var(val)
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else:
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raise KconfigParserError(self, 'Expected identifier')
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# assignment_var: ID (starting with "CONFIG_")
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def parse_assignment_var(self):
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if self.tok == TOK_ID:
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val = self.val
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if not val.startswith("CONFIG_"):
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raise KconfigParserError(self,
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'Expected identifier starting with "CONFIG_"', TOK_NONE)
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self.get_token()
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return self.data.do_var(val[7:])
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else:
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raise KconfigParserError(self, 'Expected identifier')
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# assignment: var EQUAL y_or_n
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def parse_assignment(self):
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var = self.parse_assignment_var()
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if self.tok != TOK_EQUAL:
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raise KconfigParserError(self, 'Expected "="')
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self.get_token()
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self.data.do_assignment(var, self.parse_y_or_n())
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# primary: NOT primary
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# | LPAREN expr RPAREN
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# | var
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def parse_primary(self):
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if self.tok == TOK_NOT:
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self.get_token()
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val = ~self.parse_primary()
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elif self.tok == TOK_LPAREN:
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self.get_token()
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val = self.parse_expr()
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if self.tok != TOK_RPAREN:
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raise KconfigParserError(self, 'Expected ")"')
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self.get_token()
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elif self.tok == TOK_ID:
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val = self.parse_var()
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else:
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raise KconfigParserError(self, 'Expected "!" or "(" or identifier')
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return val
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# disj: primary (OR primary)*
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def parse_disj(self):
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lhs = self.parse_primary()
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while self.tok == TOK_OR:
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self.get_token()
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lhs = lhs | self.parse_primary()
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return lhs
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# expr: disj (AND disj)*
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def parse_expr(self):
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lhs = self.parse_disj()
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while self.tok == TOK_AND:
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self.get_token()
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lhs = lhs & self.parse_disj()
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return lhs
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# condition: IF expr
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# | empty
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def parse_condition(self):
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if self.tok == TOK_IF:
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self.get_token()
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return self.parse_expr()
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else:
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return None
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# property: DEFAULT y_or_n condition
|
|
# | DEPENDS ON expr
|
|
# | SELECT var condition
|
|
# | BOOL
|
|
def parse_property(self, var):
|
|
if self.tok == TOK_DEFAULT:
|
|
self.get_token()
|
|
val = self.parse_y_or_n()
|
|
cond = self.parse_condition()
|
|
self.data.do_default(var, val, cond)
|
|
elif self.tok == TOK_DEPENDS:
|
|
self.get_token()
|
|
if self.tok != TOK_ON:
|
|
raise KconfigParserError(self, 'Expected "on"')
|
|
self.get_token()
|
|
self.data.do_depends_on(var, self.parse_expr())
|
|
elif self.tok == TOK_SELECT:
|
|
self.get_token()
|
|
symbol = self.parse_var()
|
|
cond = self.parse_condition()
|
|
self.data.do_select(var, symbol, cond)
|
|
elif self.tok == TOK_IMPLY:
|
|
self.get_token()
|
|
symbol = self.parse_var()
|
|
cond = self.parse_condition()
|
|
self.data.do_imply(var, symbol, cond)
|
|
elif self.tok == TOK_BOOL:
|
|
self.get_token()
|
|
else:
|
|
raise KconfigParserError(self, 'Error in recursive descent?')
|
|
|
|
# properties: properties property
|
|
# | /* empty */
|
|
def parse_properties(self, var):
|
|
had_default = False
|
|
while self.tok == TOK_DEFAULT or self.tok == TOK_DEPENDS or \
|
|
self.tok == TOK_SELECT or self.tok == TOK_BOOL or \
|
|
self.tok == TOK_IMPLY:
|
|
self.parse_property(var)
|
|
|
|
# for nicer error message
|
|
if self.tok != TOK_SOURCE and self.tok != TOK_CONFIG and \
|
|
self.tok != TOK_ID and self.tok != TOK_EOF:
|
|
raise KconfigParserError(self, 'expected "source", "config", identifier, '
|
|
+ '"default", "depends on", "imply" or "select"')
|
|
|
|
# declaration: config var properties
|
|
def parse_declaration(self):
|
|
if self.tok == TOK_CONFIG:
|
|
self.get_token()
|
|
var = self.parse_var()
|
|
self.data.do_declaration(var)
|
|
self.parse_properties(var)
|
|
else:
|
|
raise KconfigParserError(self, 'Error in recursive descent?')
|
|
|
|
# clause: SOURCE
|
|
# | declaration
|
|
# | assignment
|
|
def parse_clause(self):
|
|
if self.tok == TOK_SOURCE:
|
|
val = self.val
|
|
self.get_token()
|
|
self.do_include(val)
|
|
elif self.tok == TOK_CONFIG:
|
|
self.parse_declaration()
|
|
elif self.tok == TOK_ID:
|
|
self.parse_assignment()
|
|
else:
|
|
raise KconfigParserError(self, 'expected "source", "config" or identifier')
|
|
|
|
# config: clause+ EOF
|
|
def parse_config(self):
|
|
while self.tok != TOK_EOF:
|
|
self.parse_clause()
|
|
return self.data
|
|
|
|
# scanner -----
|
|
|
|
def get_token(self):
|
|
while True:
|
|
self.tok = self.src[self.cursor]
|
|
self.pos = self.cursor
|
|
self.cursor += 1
|
|
|
|
self.val = None
|
|
self.tok = self.scan_token()
|
|
if self.tok is not None:
|
|
return
|
|
|
|
def check_keyword(self, rest):
|
|
if not self.src.startswith(rest, self.cursor):
|
|
return False
|
|
length = len(rest)
|
|
if self.src[self.cursor + length].isalnum() or self.src[self.cursor + length] == '|':
|
|
return False
|
|
self.cursor += length
|
|
return True
|
|
|
|
def scan_token(self):
|
|
if self.tok == '#':
|
|
self.cursor = self.src.find('\n', self.cursor)
|
|
return None
|
|
elif self.tok == '=':
|
|
return TOK_EQUAL
|
|
elif self.tok == '(':
|
|
return TOK_LPAREN
|
|
elif self.tok == ')':
|
|
return TOK_RPAREN
|
|
elif self.tok == '&' and self.src[self.pos+1] == '&':
|
|
self.cursor += 1
|
|
return TOK_AND
|
|
elif self.tok == '|' and self.src[self.pos+1] == '|':
|
|
self.cursor += 1
|
|
return TOK_OR
|
|
elif self.tok == '!':
|
|
return TOK_NOT
|
|
elif self.tok == 'd' and self.check_keyword("epends"):
|
|
return TOK_DEPENDS
|
|
elif self.tok == 'o' and self.check_keyword("n"):
|
|
return TOK_ON
|
|
elif self.tok == 's' and self.check_keyword("elect"):
|
|
return TOK_SELECT
|
|
elif self.tok == 'i' and self.check_keyword("mply"):
|
|
return TOK_IMPLY
|
|
elif self.tok == 'c' and self.check_keyword("onfig"):
|
|
return TOK_CONFIG
|
|
elif self.tok == 'd' and self.check_keyword("efault"):
|
|
return TOK_DEFAULT
|
|
elif self.tok == 'b' and self.check_keyword("ool"):
|
|
return TOK_BOOL
|
|
elif self.tok == 'i' and self.check_keyword("f"):
|
|
return TOK_IF
|
|
elif self.tok == 'y' and self.check_keyword(""):
|
|
return TOK_Y
|
|
elif self.tok == 'n' and self.check_keyword(""):
|
|
return TOK_N
|
|
elif (self.tok == 's' and self.check_keyword("ource")) or \
|
|
self.tok == 'i' and self.check_keyword("nclude"):
|
|
# source FILENAME
|
|
# include FILENAME
|
|
while self.src[self.cursor].isspace():
|
|
self.cursor += 1
|
|
start = self.cursor
|
|
self.cursor = self.src.find('\n', self.cursor)
|
|
self.val = self.src[start:self.cursor]
|
|
return TOK_SOURCE
|
|
elif self.tok.isalpha():
|
|
# identifier
|
|
while self.src[self.cursor].isalnum() or self.src[self.cursor] == '_':
|
|
self.cursor += 1
|
|
self.val = self.src[self.pos:self.cursor]
|
|
return TOK_ID
|
|
elif self.tok == '\n':
|
|
if self.cursor == len(self.src):
|
|
return TOK_EOF
|
|
self.line += 1
|
|
self.line_pos = self.cursor
|
|
elif not self.tok.isspace():
|
|
raise KconfigParserError(self, 'invalid input')
|
|
|
|
return None
|
|
|
|
if __name__ == '__main__':
|
|
argv = sys.argv
|
|
if len(argv) == 1:
|
|
print ("%s: at least one argument is required" % argv[0], file=sys.stderr)
|
|
sys.exit(1)
|
|
|
|
data = KconfigData()
|
|
parser = KconfigParser(data)
|
|
for arg in argv[3:]:
|
|
m = re.match(r'^(CONFIG_[A-Z0-9_]+)=([yn]?)$', arg)
|
|
if m is not None:
|
|
name, value = m.groups()
|
|
parser.do_assignment(name, value == 'y')
|
|
else:
|
|
fp = open(arg, 'r')
|
|
parser.parse_file(fp)
|
|
fp.close()
|
|
|
|
config = data.compute_config()
|
|
for key in sorted(config.keys()):
|
|
print ('CONFIG_%s=%s' % (key, ('y' if config[key] else 'n')))
|
|
|
|
deps = open(argv[2], 'w')
|
|
for fname in data.previously_included:
|
|
print ('%s: %s' % (argv[1], fname), file=deps)
|
|
deps.close()
|