openwrtv4/scripts/om-fwupgradecfg-gen.sh
Sven Eckelmann 78a5d25dca ar71xx: Skip more hashed blocks for OM2P(-HS) 64k variant
The OM2P(-HS)v4 got a variant which uses a slightly different flash. The
standard versions used a flash with 256KB blocks which is no longer
available. The replacement flash uses a flash with 64K blocks.

The padding for the image rootfs is already for 64K and 256K and thus can
be flashed on the device without any problems. Unfortunately, the
bootloader will check $rootfs_size (rounded down to the nearest 64k block)
minus 1x 64k. But it is now possible that the new JFFS2 rootfs_data starts
even earlier and modifies the checked region. The check will then fail and
the backup image (when available) will be booted.

Just setting it to the same number of skipped blocks as other 64K models
avoids this problem.

Signed-off-by: Sven Eckelmann <sven.eckelmann@openmesh.com>
2018-09-10 10:01:58 +02:00

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#!/bin/sh
#
# Copyright (C) 2011 OpenWrt.org
#
# This is free software, licensed under the GNU General Public License v2.
# See /LICENSE for more information.
#
usage() {
echo "Usage: $0 <OM2P|OM5P|OM5PAC|MR600|MR900|MR1750|A60|A42|A62> <out file path> <kernel path> <rootfs path>"
rm -f $CFG_OUT
exit 1
}
[ "$#" -lt 4 ] && usage
CE_TYPE=$1
CFG_OUT=$2
KERNEL_PATH=$3
ROOTFS_PATH=$4
case $CE_TYPE in
OM2P)
MAX_PART_SIZE=7168
KERNEL_FLASH_ADDR=0x1c0000
FLASH_BS=262144
MD5_SKIP_BLOCKS=4
SIZE_FACTOR=1
SIZE_FORMAT="%d"
;;
OM5P|OM5PAC|MR600|MR900|MR1750|A60)
MAX_PART_SIZE=7808
KERNEL_FLASH_ADDR=0xb0000
FLASH_BS=65536
MD5_SKIP_BLOCKS=4
SIZE_FACTOR=1
SIZE_FORMAT="%d"
;;
A42)
MAX_PART_SIZE=15616
KERNEL_FLASH_ADDR=0x180000
FLASH_BS=65536
MD5_SKIP_BLOCKS=4
SIZE_FACTOR=1024
SIZE_FORMAT="0x%08x"
;;
A62)
MAX_PART_SIZE=15552
KERNEL_FLASH_ADDR=0x1a0000
FLASH_BS=65536
MD5_SKIP_BLOCKS=4
SIZE_FACTOR=1024
SIZE_FORMAT="0x%08x"
;;
*)
echo "Error - unsupported ce type: $CE_TYPE"
exit 1
;;
esac
CHECK_BS=65536
KERNEL_SIZE=$(stat -c%s "$KERNEL_PATH")
KERNEL_MD5=$(mkhash md5 $KERNEL_PATH)
KERNEL_SHA256=$(mkhash sha256 $KERNEL_PATH)
KERNEL_PART_SIZE_KB=$(size=$(($KERNEL_SIZE / $FLASH_BS)); [ $(($size * $FLASH_BS)) -lt $KERNEL_SIZE ] && size=$(($size + 1)); echo $(($size * $FLASH_BS / 1024)))
KERNEL_PART_SIZE=$(printf $SIZE_FORMAT $(($KERNEL_PART_SIZE_KB * $SIZE_FACTOR)))
ROOTFS_FLASH_ADDR=$(addr=$(($KERNEL_FLASH_ADDR + ($KERNEL_PART_SIZE_KB * 1024))); printf "0x%x" $addr)
ROOTFS_SIZE=$(stat -c%s "$ROOTFS_PATH")
ROOTFS_CHECK_BLOCKS=$((($ROOTFS_SIZE / $CHECK_BS) - $MD5_SKIP_BLOCKS))
ROOTFS_MD5=$(dd if=$ROOTFS_PATH bs=$CHECK_BS count=$ROOTFS_CHECK_BLOCKS 2>&- | mkhash md5)
ROOTFS_MD5_FULL=$(mkhash md5 $ROOTFS_PATH)
ROOTFS_SHA256_FULL=$(mkhash sha256 $ROOTFS_PATH)
ROOTFS_CHECK_SIZE=$(printf '0x%x' $(($ROOTFS_CHECK_BLOCKS * $CHECK_BS)))
ROOTFS_PART_SIZE_KB=$(($MAX_PART_SIZE - $KERNEL_PART_SIZE_KB))
ROOTFS_PART_SIZE=$(printf $SIZE_FORMAT $(($ROOTFS_PART_SIZE_KB * $SIZE_FACTOR)))
cat << EOF > $CFG_OUT
[vmlinux]
filename=kernel
md5sum=$KERNEL_MD5
filemd5sum=$KERNEL_MD5
filesha256sum=$KERNEL_SHA256
flashaddr=$KERNEL_FLASH_ADDR
checksize=0x0
cmd_success=setenv bootseq 1,2; setenv kernel_size_1 $KERNEL_PART_SIZE; saveenv
cmd_fail=reset
[rootfs]
filename=rootfs
md5sum=$ROOTFS_MD5
filemd5sum=$ROOTFS_MD5_FULL
filesha256sum=$ROOTFS_SHA256_FULL
flashaddr=$ROOTFS_FLASH_ADDR
checksize=$ROOTFS_CHECK_SIZE
cmd_success=setenv bootseq 1,2; setenv kernel_size_1 $KERNEL_PART_SIZE; setenv rootfs_size_1 $ROOTFS_PART_SIZE; saveenv
cmd_fail=reset
EOF