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authorFabio Berton <fabio.berton@ossystems.com.br>2016-10-04 13:54:10 (GMT)
committerRichard Purdie <richard.purdie@linuxfoundation.org>2016-10-07 15:43:58 (GMT)
commit7df195106caefe2f6272221f2676d621e04b586c (patch)
tree64e9a8c5c5e64a31e1b91d9cd43f3bb1118437d5 /meta/classes/uboot-extlinux-config.bbclass
parent09a9de45e1d715ca5897fefc7935392f20a7d519 (diff)
downloadpoky-7df195106caefe2f6272221f2676d621e04b586c.tar.gz
classes/uboot-extlinux-config: Add class
This class allow the extlinux.conf generation for U-Boot use. The U-Boot support for it is given to allow the Generic Distribution Configuration specification use by OpenEmbedded-based products. This class can be inherited by u-boot recipes to create extlinux.conf and boot using menu options. U-boot with extlinux support is machine dependent, so to use this class you need to set UBOOT_EXTLINUX to 1 in machine configuration file and also set root= kernel cmdline UBOOT_EXTLINUX_ROOT. This variable is used to pass root kernel cmdline, e.g: UBOOT_EXTLINUX_ROOT = "root=/dev/mmcblk2p2" (From OE-Core rev: 7c18abeb2a6ef8b7bb53aa92a9ee76bd465fada2) Signed-off-by: Fabio Berton <fabio.berton@ossystems.com.br> Signed-off-by: Otavio Salvador <otavio@ossystems.com.br> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
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diff --git a/meta/classes/uboot-extlinux-config.bbclass b/meta/classes/uboot-extlinux-config.bbclass
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1# uboot-extlinux-config.bbclass
2#
3# This class allow the extlinux.conf generation for U-Boot use. The
4# U-Boot support for it is given to allow the Generic Distribution
5# Configuration specification use by OpenEmbedded-based products.
6#
7# External variables:
8#
9# UBOOT_EXTLINUX_CONSOLE - Set to "console=ttyX" to change kernel boot
10# default console.
11# UBOOT_EXTLINUX_LABELS - A list of targets for the automatic config.
12# UBOOT_EXTLINUX_KERNEL_ARGS - Add additional kernel arguments.
13# UBOOT_EXTLINUX_KERNEL_IMAGE - Kernel image name.
14# UBOOT_EXTLINUX_FDTDIR - Device tree directory.
15# UBOOT_EXTLINUX_INITRD - Indicates a list of filesystem images to
16# concatenate and use as an initrd (optional).
17# UBOOT_EXTLINUX_MENU_DESCRIPTION - Name to use as description.
18# UBOOT_EXTLINUX_ROOT - Root kernel cmdline.
19#
20# If there's only one label system will boot automatically and menu won't be
21# created. If you want to use more than one labels, e.g linux and alternate,
22# use overrides to set menu description, console and others variables.
23#
24# Ex:
25#
26# UBOOT_EXTLINUX_LABELS ??= "default fallback"
27#
28# UBOOT_EXTLINUX_KERNEL_IMAGE_default ??= "../zImage"
29# UBOOT_EXTLINUX_MENU_DESCRIPTION_default ??= "Linux Default"
30#
31# UBOOT_EXTLINUX_KERNEL_IMAGE_fallback ??= "../zImage-fallback"
32# UBOOT_EXTLINUX_MENU_DESCRIPTION_fallback ??= "Linux Fallback"
33#
34# Results:
35#
36# menu title Select the boot mode
37# LABEL Linux Default
38# KERNEL ../zImage
39# FDTDIR ../
40# APPEND root=/dev/mmcblk2p2 rootwait rw console=${console}
41# LABEL Linux Fallback
42# KERNEL ../zImage-fallback
43# FDTDIR ../
44# APPEND root=/dev/mmcblk2p2 rootwait rw console=${console}
45#
46# Copyright (C) 2016, O.S. Systems Software LTDA. All Rights Reserved
47# Released under the MIT license (see packages/COPYING)
48#
49# The kernel has an internal default console, which you can override with
50# a console=...some_tty...
51UBOOT_EXTLINUX_CONSOLE ??= "console=${console}"
52UBOOT_EXTLINUX_LABELS ??= "linux"
53UBOOT_EXTLINUX_FDTDIR ??= "../"
54UBOOT_EXTLINUX_KERNEL_IMAGE ??= "../${KERNEL_IMAGETYPE}"
55UBOOT_EXTLINUX_KERNEL_ARGS ??= "rootwait rw"
56UBOOT_EXTLINUX_MENU_DESCRIPTION_linux ??= "${DISTRO_NAME}"
57
58UBOOT_EXTLINUX_CONFIG = "${B}/extlinux.conf"
59
60python create_extlinux_config() {
61 if d.getVar("UBOOT_EXTLINUX", True) != "1":
62 return
63
64 if not d.getVar('WORKDIR', True):
65 bb.error("WORKDIR not defined, unable to package")
66
67 labels = d.getVar('UBOOT_EXTLINUX_LABELS', True)
68 if not labels:
69 bb.fatal("UBOOT_EXTLINUX_LABELS not defined, nothing to do")
70
71 if not labels.strip():
72 bb.fatal("No labels, nothing to do")
73
74 cfile = d.getVar('UBOOT_EXTLINUX_CONFIG', True)
75 if not cfile:
76 bb.fatal('Unable to read UBOOT_EXTLINUX_CONFIG')
77
78 try:
79 with open(cfile, 'w') as cfgfile:
80 cfgfile.write('# Generic Distro Configuration file generated by OpenEmbedded\n')
81
82 if len(labels.split()) > 1:
83 cfgfile.write('menu title Select the boot mode\n')
84
85 for label in labels.split():
86 localdata = bb.data.createCopy(d)
87
88 overrides = localdata.getVar('OVERRIDES', True)
89 if not overrides:
90 bb.fatal('OVERRIDES not defined')
91
92 localdata.setVar('OVERRIDES', label + ':' + overrides)
93 bb.data.update_data(localdata)
94
95 extlinux_console = localdata.getVar('UBOOT_EXTLINUX_CONSOLE', True)
96
97 menu_description = localdata.getVar('UBOOT_EXTLINUX_MENU_DESCRIPTION', True)
98 if not menu_description:
99 menu_description = label
100
101 root = localdata.getVar('UBOOT_EXTLINUX_ROOT', True)
102 if not root:
103 bb.fatal('UBOOT_EXTLINUX_ROOT not defined')
104
105 kernel_image = localdata.getVar('UBOOT_EXTLINUX_KERNEL_IMAGE', True)
106 fdtdir = localdata.getVar('UBOOT_EXTLINUX_FDTDIR', True)
107 if fdtdir:
108 cfgfile.write('LABEL %s\n\tKERNEL %s\n\tFDTDIR %s\n' %
109 (menu_description, kernel_image, fdtdir))
110 else:
111 cfgfile.write('LABEL %s\n\tKERNEL %s\n' % (menu_description, kernel_image))
112
113 kernel_args = localdata.getVar('UBOOT_EXTLINUX_KERNEL_ARGS', True)
114
115 initrd = localdata.getVar('UBOOT_EXTLINUX_INITRD', True)
116 if initrd:
117 cfgfile.write('\tINITRD %s\n'% initrd)
118
119 kernel_args = root + " " + kernel_args
120 cfgfile.write('\tAPPEND %s %s\n' % (kernel_args, extlinux_console))
121
122 except OSError:
123 bb.fatal('Unable to open %s' % (cfile))
124}
125
126do_install[prefuncs] += "create_extlinux_config"