xref: /openbmc/u-boot/tools/binman/control.py (revision baefb63a) 
1# Copyright (c) 2016 Google, Inc
2# Written by Simon Glass <sjg@chromium.org>
3#
4# SPDX-License-Identifier:      GPL-2.0+
5#
6# Creates binary images from input files controlled by a description
7#
8
9from collections import OrderedDict
10import os
11import sys
12import tools
13
14import command
15import elf
16import fdt
17import fdt_util
18from image import Image
19import tout
20
21# List of images we plan to create
22# Make this global so that it can be referenced from tests
23images = OrderedDict()
24
25def _ReadImageDesc(binman_node):
26    """Read the image descriptions from the /binman node
27
28    This normally produces a single Image object called 'image'. But if
29    multiple images are present, they will all be returned.
30
31    Args:
32        binman_node: Node object of the /binman node
33    Returns:
34        OrderedDict of Image objects, each of which describes an image
35    """
36    images = OrderedDict()
37    if 'multiple-images' in binman_node.props:
38        for node in binman_node.subnodes:
39            images[node.name] = Image(node.name, node)
40    else:
41        images['image'] = Image('image', binman_node)
42    return images
43
44def _FindBinmanNode(dtb):
45    """Find the 'binman' node in the device tree
46
47    Args:
48        dtb: Fdt object to scan
49    Returns:
50        Node object of /binman node, or None if not found
51    """
52    for node in dtb.GetRoot().subnodes:
53        if node.name == 'binman':
54            return node
55    return None
56
57def Binman(options, args):
58    """The main control code for binman
59
60    This assumes that help and test options have already been dealt with. It
61    deals with the core task of building images.
62
63    Args:
64        options: Command line options object
65        args: Command line arguments (list of strings)
66    """
67    global images
68
69    if options.full_help:
70        pager = os.getenv('PAGER')
71        if not pager:
72            pager = 'more'
73        fname = os.path.join(os.path.dirname(os.path.realpath(sys.argv[0])),
74                            'README')
75        command.Run(pager, fname)
76        return 0
77
78    # Try to figure out which device tree contains our image description
79    if options.dt:
80        dtb_fname = options.dt
81    else:
82        board = options.board
83        if not board:
84            raise ValueError('Must provide a board to process (use -b <board>)')
85        board_pathname = os.path.join(options.build_dir, board)
86        dtb_fname = os.path.join(board_pathname, 'u-boot.dtb')
87        if not options.indir:
88            options.indir = ['.']
89        options.indir.append(board_pathname)
90
91    try:
92        tout.Init(options.verbosity)
93        elf.debug = options.debug
94        try:
95            tools.SetInputDirs(options.indir)
96            tools.PrepareOutputDir(options.outdir, options.preserve)
97            dtb = fdt.FdtScan(dtb_fname)
98            node = _FindBinmanNode(dtb)
99            if not node:
100                raise ValueError("Device tree '%s' does not have a 'binman' "
101                                 "node" % dtb_fname)
102            images = _ReadImageDesc(node)
103            for image in images.values():
104                # Perform all steps for this image, including checking and
105                # writing it. This means that errors found with a later
106                # image will be reported after earlier images are already
107                # completed and written, but that does not seem important.
108                image.GetEntryContents()
109                image.GetEntryPositions()
110                image.PackEntries()
111                image.CheckSize()
112                image.CheckEntries()
113                image.ProcessEntryContents()
114                image.WriteSymbols()
115                image.BuildImage()
116        finally:
117            tools.FinaliseOutputDir()
118    finally:
119        tout.Uninit()
120
121    return 0
122