xref: /openbmc/u-boot/tools/binman/control.py (revision a22bbfda) 
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 fdt
16import fdt_util
17from image import Image
18import tout
19
20# List of images we plan to create
21# Make this global so that it can be referenced from tests
22images = OrderedDict()
23
24def _ReadImageDesc(binman_node):
25    """Read the image descriptions from the /binman node
26
27    This normally produces a single Image object called 'image'. But if
28    multiple images are present, they will all be returned.
29
30    Args:
31        binman_node: Node object of the /binman node
32    Returns:
33        OrderedDict of Image objects, each of which describes an image
34    """
35    images = OrderedDict()
36    if 'multiple-images' in binman_node.props:
37        for node in binman_node.subnodes:
38            images[node.name] = Image(node.name, node)
39    else:
40        images['image'] = Image('image', binman_node)
41    return images
42
43def _FindBinmanNode(dtb):
44    """Find the 'binman' node in the device tree
45
46    Args:
47        dtb: Fdt object to scan
48    Returns:
49        Node object of /binman node, or None if not found
50    """
51    for node in dtb.GetRoot().subnodes:
52        if node.name == 'binman':
53            return node
54    return None
55
56def Binman(options, args):
57    """The main control code for binman
58
59    This assumes that help and test options have already been dealt with. It
60    deals with the core task of building images.
61
62    Args:
63        options: Command line options object
64        args: Command line arguments (list of strings)
65    """
66    global images
67
68    if options.full_help:
69        pager = os.getenv('PAGER')
70        if not pager:
71            pager = 'more'
72        fname = os.path.join(os.path.dirname(os.path.realpath(sys.argv[0])),
73                            'README')
74        command.Run(pager, fname)
75        return 0
76
77    # Try to figure out which device tree contains our image description
78    if options.dt:
79        dtb_fname = options.dt
80    else:
81        board = options.board
82        if not board:
83            raise ValueError('Must provide a board to process (use -b <board>)')
84        board_pathname = os.path.join(options.build_dir, board)
85        dtb_fname = os.path.join(board_pathname, 'u-boot.dtb')
86        if not options.indir:
87            options.indir = ['.']
88        options.indir.append(board_pathname)
89
90    try:
91        tout.Init(options.verbosity)
92        try:
93            tools.SetInputDirs(options.indir)
94            tools.PrepareOutputDir(options.outdir, options.preserve)
95            dtb = fdt.FdtScan(dtb_fname)
96            node = _FindBinmanNode(dtb)
97            if not node:
98                raise ValueError("Device tree '%s' does not have a 'binman' "
99                                 "node" % dtb_fname)
100            images = _ReadImageDesc(node)
101            for image in images.values():
102                # Perform all steps for this image, including checking and
103                # writing it. This means that errors found with a later
104                # image will be reported after earlier images are already
105                # completed and written, but that does not seem important.
106                image.GetEntryContents()
107                image.GetEntryPositions()
108                image.PackEntries()
109                image.CheckSize()
110                image.CheckEntries()
111                image.ProcessEntryContents()
112                image.BuildImage()
113        finally:
114            tools.FinaliseOutputDir()
115    finally:
116        tout.Uninit()
117
118    return 0
119