31be2ec220
Since things are no longer installed in $(HOST_DIR)/usr, the callers should also not refer to it. This is a mechanical change with git grep -l 'HOST_DIR}\?/usr/' board | xargs sed -i 's%\(HOST_DIR}\?\)/usr/%\1/%g' Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
70 lines
2.4 KiB
Bash
Executable File
70 lines
2.4 KiB
Bash
Executable File
#!/bin/sh
|
|
|
|
# This scripts makes a minimal bootable SD card image for the Chromebook.
|
|
# The resulting file is called bootsd.img. It should be written directly
|
|
# to the card:
|
|
#
|
|
# SD=/dev/mmcblk1 # check your device name!
|
|
# dd if=output/images/bootsd.img of=$SD
|
|
#
|
|
# The partitions are created just large enough to hold the kernel and
|
|
# the rootfs image. Most of the card will be empty, and the secondary
|
|
# GPT will not be in its proper location.
|
|
|
|
# cgpt does not create protective MBR, and the kernel refuses to read
|
|
# GPT unless there's some kind of MBR in sector 0. So we need parted
|
|
# to write that single sector before doing anything with the GPT.
|
|
cgpt=$HOST_DIR/bin/cgpt
|
|
parted=$HOST_DIR/sbin/parted
|
|
kernel=$BINARIES_DIR/uImage.kpart
|
|
rootfs=$BINARIES_DIR/rootfs.ext2
|
|
|
|
run() { echo "$@"; "$@"; }
|
|
die() { echo "$@" >&2; exit 1; }
|
|
test -f $kernel || die "No kernel image found"
|
|
test -f $rootfs || die "No rootfs image found"
|
|
test -x $cgpt || die "cgpt not found (host-vboot-utils have not been built?)"
|
|
|
|
# True file sizes in bytes
|
|
kernelsize=`stat -t $kernel | cut -d\ -f2`
|
|
rootfssize=`stat -t $rootfs | cut -d\ -f2`
|
|
|
|
# The card is partitioned in sectors of 8KB.
|
|
# 4 sectors are reserved for MBR+GPT. Their actual size turns out
|
|
# to be 33 512-blocks which is just over 2 sectors, but we align
|
|
# it to a nice round number.
|
|
sec=8192
|
|
kernelsec=$(((kernelsize+8191)>>13))
|
|
rootfssec=$(((rootfssize+8191)>>13))
|
|
headersec=4
|
|
|
|
# There is also a copy of MBR+GPT at the end of the image.
|
|
# It's going to be useless but both tools assume it's there.
|
|
imagesec=$((2*headersec+kernelsec+rootfssec))
|
|
bootsd="$BINARIES_DIR/bootsd.img"
|
|
run dd bs=$sec count=$imagesec if=/dev/zero of=$bootsd
|
|
|
|
# cgpt needs offsets and sizes in 512-blocks.
|
|
block=512
|
|
kernelstart=$((headersec<<4))
|
|
kernelblocks=$((kernelsec<<4))
|
|
rootfsblocks=$((rootfssec<<4))
|
|
rootfsstart=$((kernelstart+kernelblocks))
|
|
|
|
# This command initializes both GPT and MBR
|
|
run $parted -s $bootsd mklabel gpt
|
|
|
|
# The kernel partition must be marked as bootable, that's why -S -T -P
|
|
run $cgpt add -i 1 -b $kernelstart -s $kernelblocks \
|
|
-t kernel -l kernel \
|
|
-S 1 -T 1 -P 10 $bootsd
|
|
|
|
# It does not really matter where the rootfs partition is located as long
|
|
# as the kernel can find it.
|
|
# However, if anything is changed here, kernel.args must be updated as well.
|
|
run $cgpt add -i 2 -b $rootfsstart -s $rootfsblocks \
|
|
-t data -l rootfs $bootsd
|
|
|
|
run dd bs=$block if=$kernel of=$bootsd seek=$kernelstart
|
|
run dd bs=$block if=$rootfs of=$bootsd seek=$rootfsstart
|