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1#
2# Copyright OpenEmbedded Contributors
3#
4# SPDX-License-Identifier: GPL-2.0-only
5#
6# DESCRIPTION
7# This implements the 'bootimg_partition' source plugin class for
8# 'wic'. The plugin creates an image of boot partition, copying over
9# files listed in IMAGE_BOOT_FILES bitbake variable.
10#
11# AUTHORS
12# Maciej Borzecki <maciej.borzecki (at] open-rnd.pl>
13#
14
15import logging
16import os
17import re
18
19from oe.bootfiles import get_boot_files
20
21from wic import WicError
22from wic.engine import get_custom_config
23from wic.pluginbase import SourcePlugin
24from wic.misc import exec_cmd, get_bitbake_var
25
26logger = logging.getLogger('wic')
27
28class BootimgPartitionPlugin(SourcePlugin):
29 """
30 Create an image of boot partition, copying over files
31 listed in IMAGE_BOOT_FILES bitbake variable.
32 """
33
34 name = 'bootimg_partition'
35 image_boot_files_var_name = 'IMAGE_BOOT_FILES'
36
37 @classmethod
38 def do_configure_partition(cls, part, source_params, cr, cr_workdir,
39 oe_builddir, bootimg_dir, kernel_dir,
40 native_sysroot):
41 """
42 Called before do_prepare_partition(), create u-boot specific boot config
43 """
44 hdddir = "%s/boot.%d" % (cr_workdir, part.lineno)
45 install_cmd = "install -d %s" % hdddir
46 exec_cmd(install_cmd)
47
48 if not kernel_dir:
49 kernel_dir = get_bitbake_var("DEPLOY_DIR_IMAGE")
50 if not kernel_dir:
51 raise WicError("Couldn't find DEPLOY_DIR_IMAGE, exiting")
52
53 boot_files = None
54 for (fmt, id) in (("_uuid-%s", part.uuid), ("_label-%s", part.label), (None, None)):
55 if fmt:
56 var = fmt % id
57 else:
58 var = ""
59
60 boot_files = get_bitbake_var(cls.image_boot_files_var_name + var)
61 if boot_files is not None:
62 break
63
64 if boot_files is None:
65 raise WicError('No boot files defined, %s unset for entry #%d' % (cls.image_boot_files_var_name, part.lineno))
66
67 logger.debug('Boot files: %s', boot_files)
68
69 cls.install_task = get_boot_files(kernel_dir, boot_files)
70 if source_params.get('loader') != "u-boot":
71 return
72
73 configfile = cr.ks.bootloader.configfile
74 custom_cfg = None
75 if configfile:
76 custom_cfg = get_custom_config(configfile)
77 if custom_cfg:
78 # Use a custom configuration for extlinux.conf
79 extlinux_conf = custom_cfg
80 logger.debug("Using custom configuration file "
81 "%s for extlinux.conf", configfile)
82 else:
83 raise WicError("configfile is specified but failed to "
84 "get it from %s." % configfile)
85
86 if not custom_cfg:
87 # The kernel types supported by the sysboot of u-boot
88 kernel_types = ["zImage", "Image", "fitImage", "uImage", "vmlinux"]
89 has_dtb = False
90 fdt_dir = '/'
91 kernel_name = None
92
93 # Find the kernel image name, from the highest precedence to lowest
94 for image in kernel_types:
95 for task in cls.install_task:
96 src, dst = task
97 if re.match(image, src):
98 kernel_name = os.path.join('/', dst)
99 break
100 if kernel_name:
101 break
102
103 for task in cls.install_task:
104 src, dst = task
105 # We suppose that all the dtb are in the same directory
106 if re.search(r'\.dtb', src) and fdt_dir == '/':
107 has_dtb = True
108 fdt_dir = os.path.join(fdt_dir, os.path.dirname(dst))
109 break
110
111 if not kernel_name:
112 raise WicError('No kernel file found')
113
114 # Compose the extlinux.conf
115 extlinux_conf = "default Yocto\n"
116 extlinux_conf += "label Yocto\n"
117 extlinux_conf += " kernel %s\n" % kernel_name
118 if has_dtb:
119 extlinux_conf += " fdtdir %s\n" % fdt_dir
120 bootloader = cr.ks.bootloader
121 extlinux_conf += "append root=%s rootwait %s\n" \
122 % (cr.rootdev, bootloader.append if bootloader.append else '')
123
124 install_cmd = "install -d %s/extlinux/" % hdddir
125 exec_cmd(install_cmd)
126 cfg = open("%s/extlinux/extlinux.conf" % hdddir, "w")
127 cfg.write(extlinux_conf)
128 cfg.close()
129
130
131 @classmethod
132 def do_prepare_partition(cls, part, source_params, cr, cr_workdir,
133 oe_builddir, bootimg_dir, kernel_dir,
134 rootfs_dir, native_sysroot):
135 """
136 Called to do the actual content population for a partition i.e. it
137 'prepares' the partition to be incorporated into the image.
138 In this case, does the following:
139 - sets up a vfat partition
140 - copies all files listed in IMAGE_BOOT_FILES variable
141 """
142 hdddir = "%s/boot.%d" % (cr_workdir, part.lineno)
143
144 if not kernel_dir:
145 kernel_dir = get_bitbake_var("DEPLOY_DIR_IMAGE")
146 if not kernel_dir:
147 raise WicError("Couldn't find DEPLOY_DIR_IMAGE, exiting")
148
149 logger.debug('Kernel dir: %s', bootimg_dir)
150
151
152 for task in cls.install_task:
153 src_path, dst_path = task
154 logger.debug('Install %s as %s', src_path, dst_path)
155 install_cmd = "install -m 0644 -D %s %s" \
156 % (os.path.join(kernel_dir, src_path),
157 os.path.join(hdddir, dst_path))
158 exec_cmd(install_cmd)
159
160 logger.debug('Prepare boot partition using rootfs in %s', hdddir)
161 part.prepare_rootfs(cr_workdir, oe_builddir, hdddir,
162 native_sysroot, False)