mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-24 07:46:48 +00:00
1113dcab05
As I buy more hardware and continue to work on consolidation, This will apply to a lot of MediaTek platforms; rename it accordingly. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
151 lines
4.9 KiB
Bash
Executable File
151 lines
4.9 KiB
Bash
Executable File
#!/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_MTK_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 | ( MTK_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.
|
|
|
|
usage() {
|
|
echo "SYNTAX: $0 sd <file> <preloader image> <u-boot image> <u-boot offset> <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 9 ] || usage
|
|
OUTPUT="$2"
|
|
PRELOADER="$3"
|
|
UBOOT="$4"
|
|
UBOOTOFS="$5"
|
|
BOOTFS="$6"
|
|
ROOTFS="$7"
|
|
BOOTFSSIZE="$8"
|
|
ROOTFSSIZE="$9"
|
|
|
|
head=4
|
|
sect=63
|
|
|
|
set $(ptgen -o $OUTPUT -h $head -s $sect -a 0 -l 1024 \
|
|
-t 41 -p 512k@${UBOOTOFS} \
|
|
-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
|
|
|
|
# For eMMC-only boards like U7623 the preloader doesn't need to be included in the
|
|
# main image as it's only ever needed in the eMMC boot partition.
|
|
if [ -r ${PRELOADER} ]; then
|
|
dd bs=1024 if="${PRELOADER}" of="${OUTPUT}" seek="${PRELOADER_OFFSET}" conv=notrunc
|
|
fi
|
|
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
|