forked from openwrt/openwrt
-
-
Notifications
You must be signed in to change notification settings - Fork 5
/
gen_banana_pi_img.sh
executable file
·145 lines (132 loc) · 4.72 KB
/
gen_banana_pi_img.sh
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
#!/bin/sh
#
# Copyright © 2019 Alexey Loukianov <lx2@lexa2.ru>
# Copyright © 2020 David Woodhouse <dwmw2@infradead.org>
#
# This is free software, licensed under the GNU General Public License v2.
# See /LICENSE for more information.
#
# Generates a bootable SD card image for Banana Pi R2 (and probably
# other similar boards) as documented at
# http://www.fw-web.de/dokuwiki/doku.php?id=en:bpi-r2:storage
#
# The first sector must contain the SDMMC_BOOT header shown
# below, and also contains the MBR partition table in the end
# of the sector. The partition table must contain no active
# partitions.
#
# The second sector must contain the BRLYT header, and the
# special preloader image goes in sector 4; 2KiB into the image.
#
# The preloader loads U-Boot from sector 640; 320KiB into the image.
# The location and the size (512KiB) are fixed and not read from
# the partition table. We set up a partition for it merely for
# our own convenience for upgrades, etc.
#
# The second partition is a FAT file system containing the kernel
# image and a uboot.env file, which is provided to this script as
# $4 (bootfs image). Its size is configurable with the
# CONFIG_BANANA_PI_BOOT_PARTSIZE option; by default 32MiB.
#
# The root filesystem comes next in the third partition.
#
#
# ------------------------ Sector Offset
# | MBR + SDMMC_BOOT | 0 0x0
# |----------------------|
# | BRLYT header | 1 0x200
# |----------------------|
# . .
# . .
# |----------------------|
# | | 4 0x800
# | |
# | Preloader |
# . .
# . .
# | | 639
# |----------------------|
# | MBR partition #1 | 640 0x50000
# | |
# | U-Boot |
# . .
# . .
# | | 1663
# |----------------------|
# | MBR partition #2 |
# | |
# | FAT partition | ( BANANA_PI_BOOT_PARTSIZE
# . . default 32MiB )
# . (kernel, uEnv) .
# | |
# |----------------------|
# | MBR partition #3 |
# | |
# | Root partition |
# | | ( TARGET_ROOTFS_PARTSIZE
# | (squashfs+overlay | default 104MiB )
# . or ext4, etc.) .
# . .
# | |
# ------------------------
#
# For eMMC boot, everything up to and including the preloader must be
# written to /dev/mmcblk0boot0, with the SDMMC_BOOT header changed to
# read EMMC_BOOT\0 instead.
#
# The contents of the main eMMC are identical to the SD card layout,
# with the preloader loading 512KiB of U-Boot starting at 0x50000.
function usage() {
echo "SYNTAX: $0 sd <file> <preloader image> <u-boot image> <bootfs image> <rootfs image> <bootfs size> <rootfs size>"
echo " OR: $0 emmc <file> <preloader image>"
exit 1
}
set -e
PRELOADER_OFFSET=2 # 2KiB
SDMMC_BOOT="SDMMC_BOOT\x00\x00\x01\x00\x00\x00\x00\x02\x00\x00"
EMMC_BOOT="EMMC_BOOT\x00\x00\x00\x01\x00\x00\x00\x00\x02\x00\x00"
BRLYT="BRLYT\x00\x00\x00\x01\x00\x00\x00\x00\x08\x00\x00\
\x00\x08\x00\x00\x42\x42\x42\x42\x08\x00\x01\x00\x00\x08\x00\x00\
\x00\x08\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
case $1 in
sd)
[ $# -eq 8 ] || usage
OUTPUT="$2"
PRELOADER="$3"
UBOOT="$4"
BOOTFS="$5"
ROOTFS="$6"
BOOTFSSIZE="$7"
ROOTFSSIZE="$8"
head=4
sect=63
set $(ptgen -o $OUTPUT -h $head -s $sect -a 0 -l 1024 \
-t 41 -p 512k@320k \
-t c -p ${BOOTFSSIZE}M \
-t 83 -p ${ROOTFSSIZE}M )
UBOOT_OFFSET="$(($1 / 512))"
UBOOT_SIZE="$(($2 / 512))"
BOOTFS_OFFSET="$(($3 / 512))"
BOOTFS_SIZE="$(($4 / 512))"
ROOTFS_OFFSET="$(($5 / 512))"
ROOTFS_SIZE="$(($6 / 512))"
echo -en "${SDMMC_BOOT}" | dd bs=1 of="${OUTPUT}" seek=0 conv=notrunc
echo -en "${BRLYT}" | dd bs=1 of="${OUTPUT}" seek=512 conv=notrunc
dd bs=1024 if="${PRELOADER}" of="${OUTPUT}" seek="${PRELOADER_OFFSET}" conv=notrunc
dd bs=512 if="${UBOOT}" of="${OUTPUT}" seek="${UBOOT_OFFSET}" conv=notrunc
dd bs=512 if="${BOOTFS}" of="${OUTPUT}" seek="${BOOTFS_OFFSET}" conv=notrunc
dd bs=512 if="${ROOTFS}" of="${OUTPUT}" seek="${ROOTFS_OFFSET}" conv=notrunc
dd bs=128k if=/dev/zero of="${OUTPUT}" count=1 oflag=append conv=notrunc
;;
emmc)
[ $# -eq 3 ] || usage
OUTPUT="$2"
PRELOADER="$3"
echo -en "${EMMC_BOOT}" | dd bs=1 of="${OUTPUT}" seek=0
echo -en "${BRLYT}" | dd bs=1 of="${OUTPUT}" seek=512 conv=notrunc
dd bs=1024 if="${PRELOADER}" of="${OUTPUT}" seek="${PRELOADER_OFFSET}" conv=notrunc
;;
*)
usage
;;
esac