aboutsummaryrefslogtreecommitdiffstats
path: root/meta/classes/boot-directdisk.bbclass
blob: 0da9932f4fbeaf5de1428a785eb6ca01a9d76081 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
# boot-directdisk.bbclass
# (loosly based off bootimg.bbclass Copyright (C) 2004, Advanced Micro Devices, Inc.)
#
# Create an image which can be placed directly onto a harddisk using dd and then
# booted.
#
# This uses syslinux. extlinux would have been nice but required the ext2/3 
# partition to be mounted. grub requires to run itself as part of the install 
# process.
#
# The end result is a 512 boot sector populated with an MBR and partition table
# followed by an msdos fat16 partition containing syslinux and a linux kernel
# completed by the ext2/3 rootfs.
#
# We have to push the msdos parition table size > 16MB so fat 16 is used as parted
# won't touch fat12 partitions.

# External variables needed

# ${ROOTFS} - the rootfs image to incorporate

do_bootdirectdisk[depends] += "dosfstools-native:do_populate_sysroot \
                               syslinux:do_populate_sysroot \
                               syslinux-native:do_populate_sysroot \
                               parted-native:do_populate_sysroot \
                               mtools-native:do_populate_sysroot "

PACKAGES = " "
EXCLUDE_FROM_WORLD = "1"

BOOTDD_VOLUME_ID   ?= "boot"
BOOTDD_EXTRA_SPACE ?= "16384"

EFI = "${@bb.utils.contains("MACHINE_FEATURES", "efi", "1", "0", d)}"
EFI_PROVIDER ?= "grub-efi"
EFI_CLASS = "${@bb.utils.contains("MACHINE_FEATURES", "efi", "${EFI_PROVIDER}", "", d)}"

# Include legacy boot if MACHINE_FEATURES includes "pcbios" or if it does not
# contain "efi". This way legacy is supported by default if neither is
# specified, maintaining the original behavior.
def pcbios(d):
    pcbios = bb.utils.contains("MACHINE_FEATURES", "pcbios", "1", "0", d)
    if pcbios == "0":
        pcbios = bb.utils.contains("MACHINE_FEATURES", "efi", "0", "1", d)
    return pcbios

def pcbios_class(d):
    if d.getVar("PCBIOS", True) == "1":
        return "syslinux"
    return ""

PCBIOS = "${@pcbios(d)}"
PCBIOS_CLASS = "${@pcbios_class(d)}"

inherit ${PCBIOS_CLASS}
inherit ${EFI_CLASS}

# Get the build_syslinux_cfg() function from the syslinux class

AUTO_SYSLINUXCFG = "1"
DISK_SIGNATURE ?= "${DISK_SIGNATURE_GENERATED}"
SYSLINUX_ROOT ?= "root=/dev/sda2"
SYSLINUX_TIMEOUT ?= "10"

IS_VMDK = '${@bb.utils.contains("IMAGE_FSTYPES", "vmdk", "true", "false", d)}'

boot_direct_populate() {
	dest=$1
	install -d $dest

	# Install bzImage, initrd, and rootfs.img in DEST for all loaders to use.
	install -m 0644 ${STAGING_KERNEL_DIR}/bzImage $dest/vmlinuz

	if [ -n "${INITRD}" ] && [ -s "${INITRD}" ]; then
		install -m 0644 ${INITRD} $dest/initrd
	fi

}

build_boot_dd() {
	HDDDIR="${S}/hdd/boot"
	HDDIMG="${S}/hdd.image"
	IMAGE=${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.hdddirect

	boot_direct_populate $HDDDIR

	if [ "${PCBIOS}" = "1" ]; then
		syslinux_hddimg_populate $HDDDIR
	fi
	if [ "${EFI}" = "1" ]; then
		efi_hddimg_populate $HDDDIR
	fi

	if [ "${IS_VMDK}" = "true" ]; then
		if [ "x${AUTO_SYSLINUXMENU}" = "x1" ] ; then
			install -m 0644 ${STAGING_DIR}/${MACHINE}/usr/share/syslinux/vesamenu.c32 ${HDDDIR}${SYSLINUXDIR}/vesamenu.c32
			if [ "x${SYSLINUX_SPLASH}" != "x" ] ; then
				install -m 0644 ${SYSLINUX_SPLASH} ${HDDDIR}${SYSLINUXDIR}/splash.lss
			fi
		fi
	fi

	BLOCKS=`du -bks $HDDDIR | cut -f 1`
	BLOCKS=`expr $BLOCKS + ${BOOTDD_EXTRA_SPACE}`

	# Ensure total sectors is an integral number of sectors per
	# track or mcopy will complain. Sectors are 512 bytes, and we
	# generate images with 32 sectors per track. This calculation is
	# done in blocks, thus the mod by 16 instead of 32.
	BLOCKS=$(expr $BLOCKS + $(expr 16 - $(expr $BLOCKS % 16)))

	mkdosfs -n ${BOOTDD_VOLUME_ID} -S 512 -C $HDDIMG $BLOCKS 
	mcopy -i $HDDIMG -s $HDDDIR/* ::/

	if [ "${PCBIOS}" = "1" ]; then
		syslinux_hdddirect_install $HDDIMG
	fi	
	chmod 644 $HDDIMG

	ROOTFSBLOCKS=`du -Lbks ${ROOTFS} | cut -f 1`
	TOTALSIZE=`expr $BLOCKS + $ROOTFSBLOCKS`
	END1=`expr $BLOCKS \* 1024`
	END2=`expr $END1 + 512`
	END3=`expr \( $ROOTFSBLOCKS \* 1024 \) + $END1`

	echo $ROOTFSBLOCKS $TOTALSIZE $END1 $END2 $END3
	rm -rf $IMAGE
	dd if=/dev/zero of=$IMAGE bs=1024 seek=$TOTALSIZE count=1

	parted $IMAGE mklabel msdos
	parted $IMAGE mkpart primary fat16 0 ${END1}B
	parted $IMAGE unit B mkpart primary ext2 ${END2}B ${END3}B
	parted $IMAGE set 1 boot on 

	parted $IMAGE print

	awk "BEGIN { printf \"$(echo ${DISK_SIGNATURE} | fold -w 2 | tac | paste -sd '' | sed 's/\(..\)/\\x&/g')\" }" | \
		dd of=$IMAGE bs=1 seek=440 conv=notrunc

	OFFSET=`expr $END2 / 512`
	if [ "${PCBIOS}" = "1" ]; then
		dd if=${STAGING_DATADIR}/syslinux/mbr.bin of=$IMAGE conv=notrunc
	fi

	dd if=$HDDIMG of=$IMAGE conv=notrunc seek=1 bs=512
	dd if=${ROOTFS} of=$IMAGE conv=notrunc seek=$OFFSET bs=512

	cd ${DEPLOY_DIR_IMAGE}
	rm -f ${DEPLOY_DIR_IMAGE}/${IMAGE_LINK_NAME}.hdddirect
	ln -s ${IMAGE_NAME}.hdddirect ${DEPLOY_DIR_IMAGE}/${IMAGE_LINK_NAME}.hdddirect
} 

python do_bootdirectdisk() {
    validate_disk_signature(d)
    if d.getVar("PCBIOS", True) == "1":
        bb.build.exec_func('build_syslinux_cfg', d)
    if d.getVar("EFI", True) == "1":
        bb.build.exec_func('build_efi_cfg', d)
    bb.build.exec_func('build_boot_dd', d)
}

def generate_disk_signature():
    import uuid

    signature = str(uuid.uuid4())[:8]

    if signature != '00000000':
        return signature
    else:
        return 'ffffffff'

def validate_disk_signature(d):
    import re

    disk_signature = d.getVar("DISK_SIGNATURE", True)

    if not re.match(r'^[0-9a-fA-F]{8}$', disk_signature):
        bb.fatal("DISK_SIGNATURE '%s' must be an 8 digit hex string" % disk_signature)

DISK_SIGNATURE_GENERATED := "${@generate_disk_signature()}"

addtask bootdirectdisk before do_build