0a4aa20e8d
The AmlToHex script and Posix/WindowsLike wrappers convert
an AML file to a .hex file, containing a C array storing
AML bytecode. This ".hex" file can then be included in a
C file, allowing to access the AML bytecode from this C
file.
The EDK2 build system doesn't allow to a depict dependency
orders between files of different languages. For instance,
in a module containing a ".c" file and a ".asl", the ".c"
file may or may not be built prior to the ".asl" file.
This prevents any inclusion of a generated ".hex" in a
".c" file since this later ".hex" file may or may not
have been created yet.
This patch modifies the AmlToC script to generate a C file
instead of a ".hex" file.
It also adds the generation of an intermediate ".amli" file
when compiling an ASL file, and adds a rule to convert this
".amli" to a C file.
This allows to generate a C file containing the AML bytecode
from an ASL file. This C file will then be handled by the EDK2
build system to generate an object file.
Thus, no file inclusion will be required anymore. The C file
requiring the AML bytecode as a C array, and the ASL file,
will be compiled independently. The C array must be defined
as an external symbol. The linker is resolving the
reference to the C array symbol.
To summarize, the flow goes as:
-1. ASL file is compiled to AML;
-2. AML file is copied to a ".amli" intermediate file;
-3. EDK2 build system applies the rule relevant to ".amli"
files. This is, calling the "AmlToC" script, generating
a C file from the ".amli" file;
-4. EDK2 build system applies the rule relevant to C files.
This is creating an object file.
-5. EDK2 build system links the object file containing the
AML bytecode with the object file requiring it.
Signed-off-by: Pierre Gondois <Pierre.Gondois@arm.com>
Suggested-by: Tomas Pilar <Tomas.Pilar@arm.com>
Reviewed-by: Bob Feng <bob.c.feng@intel.com>
143 lines
4.5 KiB
Python
143 lines
4.5 KiB
Python
## @file
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#
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# Convert an AML file to a .c file containing the AML bytecode stored in a
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# C array.
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# By default, "Tables\Dsdt.aml" will generate "Tables\Dsdt.c".
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# "Tables\Dsdt.c" will contain a C array named "dsdt_aml_code" that contains
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# the AML bytecode.
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#
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# Copyright (c) 2020, ARM Limited. All rights reserved.<BR>
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#
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# SPDX-License-Identifier: BSD-2-Clause-Patent
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#
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import argparse
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import Common.EdkLogger as EdkLogger
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from Common.BuildToolError import *
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import sys
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import os
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__description__ = """
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Convert an AML file to a .c file containing the AML bytecode stored in a C
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array. By default, Tables\Dsdt.aml will generate Tables\Dsdt.c.
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Tables\Dsdt.c will contain a C array named "dsdt_aml_code" that contains
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the AML bytecode.
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"""
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## Parse the command line arguments.
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#
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# @retval A argparse.NameSpace instance, containing parsed values.
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#
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def ParseArgs():
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# Initialize the parser.
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Parser = argparse.ArgumentParser(description=__description__)
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# Define the possible arguments.
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Parser.add_argument(dest="InputFile",
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help="Path to an input AML file to generate a .c file from.")
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Parser.add_argument("-o", "--out-dir", dest="OutDir",
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help="Output directory where the .c file will be generated. Default is the input file's directory.")
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# Parse the input arguments.
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Args = Parser.parse_args()
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SplitInputName = ""
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if not os.path.exists(Args.InputFile):
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EdkLogger.error(__file__, FILE_OPEN_FAILURE,
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ExtraData=Args.InputFile)
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return None
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else:
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with open(Args.InputFile, "rb") as fIn:
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Signature = str(fIn.read(4))
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if ("DSDT" not in Signature) and ("SSDT" not in Signature):
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EdkLogger.info("Invalid file type. File does not have a valid DSDT or SSDT signature: {}".format(Args.InputFile))
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return None
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# Get the basename of the input file.
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SplitInputName = os.path.splitext(Args.InputFile)
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BaseName = os.path.basename(SplitInputName[0])
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# If no output directory is specified, output to the input directory.
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if not Args.OutDir:
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Args.OutputFile = os.path.join(os.path.dirname(Args.InputFile),
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BaseName + ".c")
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else:
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if not os.path.exists(Args.OutDir):
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os.mkdir(Args.OutDir)
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Args.OutputFile = os.path.join(Args.OutDir, BaseName + ".c")
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Args.BaseName = BaseName
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return Args
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## Convert an AML file to a .c file containing the AML bytecode stored
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# in a C array.
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#
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# @param InputFile Path to the input AML file.
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# @param OutputFile Path to the output .c file to generate.
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# @param BaseName Base name of the input file.
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# This is also the name of the generated .c file.
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#
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def AmlToC(InputFile, OutputFile, BaseName):
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ArrayName = BaseName.lower() + "_aml_code"
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FileHeader =\
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"""
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// This file has been generated from:
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// -Python script: {}
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// -Input AML file: {}
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"""
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with open(InputFile, "rb") as fIn, open(OutputFile, "w") as fOut:
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# Write header.
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fOut.write(FileHeader.format(os.path.abspath(InputFile), os.path.abspath(__file__)))
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# Write the array and its content.
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fOut.write("unsigned char {}[] = {{\n ".format(ArrayName))
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cnt = 0
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byte = fIn.read(1)
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while len(byte) != 0:
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fOut.write("0x{0:02X}, ".format(ord(byte)))
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cnt += 1
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if (cnt % 8) == 0:
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fOut.write("\n ")
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byte = fIn.read(1)
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fOut.write("\n};\n")
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## Main method
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#
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# This method:
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# 1- Initialize an EdkLogger instance.
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# 2- Parses the input arguments.
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# 3- Converts an AML file to a .c file containing the AML bytecode stored
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# in a C array.
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#
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# @retval 0 Success.
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# @retval 1 Error.
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#
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def Main():
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# Initialize an EdkLogger instance.
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EdkLogger.Initialize()
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try:
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# Parse the input arguments.
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CommandArguments = ParseArgs()
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if not CommandArguments:
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return 1
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# Convert an AML file to a .c file containing the AML bytecode stored
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# in a C array.
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AmlToC(CommandArguments.InputFile, CommandArguments.OutputFile, CommandArguments.BaseName)
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except Exception as e:
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print(e)
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return 1
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return 0
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if __name__ == '__main__':
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r = Main()
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# 0-127 is a safe return range, and 1 is a standard default error
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if r < 0 or r > 127: r = 1
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sys.exit(r)
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