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releasetools/arm_sdimage.sh

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- adapt usr partition size
 - reformulate partition sizes for easier adaptations
 - ensure 4k-block alignement of the partitions

Change-Id: I88787614163a7be177acb5dbf454b26387376a47
This commit is contained in:
Lionel Sambuc 2013-06-28 20:27:53 +02:00
parent 0cdf705cc6
commit 714dd83efe
1 changed files with 17 additions and 11 deletions
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28
releasetools/arm_sdimage.sh
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@ -95,17 +95,13 @@ sh ${BUILDSH} -V SLOPPY_FLIST=yes -V MKBINUTILS=yes -V MKGCCCMDS=yes -j ${JOBS}
# All sized are written in 512 byte blocks # All sized are written in 512 byte blocks
# #
# we create a disk image of about 2 gig's # we create a disk image of about 2 gig's
# # for alignement reasons, prefer sizes which are multiples of 4096 bytes
# The size of the extended partition where we store
# /root /home and /usr in separate sub partitions is
# about 1 gig
# #
: ${IMG_SIZE=$((2**31 / 512))} : ${IMG_SIZE= $(( 2*(2**30) / 512))}
: ${FAT_SIZE=$((20480))} : ${FAT_SIZE= $(( 10*(2**20) / 512))}
: ${EXTENDED_SIZE=$((2**30 / 512))} : ${ROOT_SIZE=$(( 64*(2**20) / 512))}
: ${ROOT_SIZE=$((2**26 / 512))} : ${HOME_SIZE=$(( 128*(2**20) / 512))}
: ${HOME_SIZE=$((2**27 / 512))} : ${USR_SIZE= $((1536*(2**20) / 512))}
: ${USR_SIZE=$((2**29 / 512))}
# #
# create a fstab entry in /etc this is normally done during the # create a fstab entry in /etc this is normally done during the
@ -137,13 +133,20 @@ dd if=/dev/zero of=${IMG} bs=512 count=1 seek=$(($IMG_SIZE -1))
# #
# Do some math to determine the start addresses of the partitions. # Do some math to determine the start addresses of the partitions.
# Ensure the start of the partitions are always aligned, the end will
# always be as we assume the sizes are multiples of 4096 bytes, which
# is always true as soon as you have an integer multiple of 1MB.
# #
FAT_START=2048 FAT_START=2048
EXTENDED_START=$(($FAT_START + $FAT_SIZE)) EXTENDED_START=$(($FAT_START + $FAT_SIZE))
EXTENDED_SIZE=$(($ROOT_SIZE + $HOME_SIZE + $USR_SIZE + 3)) EXTENDED_START=$(($EXTENDED_START + 8 - ($EXTENDED_START % 8)))
ROOT_START=$(($EXTENDED_START + 1)) ROOT_START=$(($EXTENDED_START + 1))
ROOT_START=$(($ROOT_START + 8 - ($ROOT_START % 8)))
HOME_START=$(($ROOT_START + $ROOT_SIZE + 1)) HOME_START=$(($ROOT_START + $ROOT_SIZE + 1))
HOME_START=$(($HOME_START + 8 - ($HOME_START % 8)))
USR_START=$(($HOME_START + $HOME_SIZE + 1)) USR_START=$(($HOME_START + $HOME_SIZE + 1))
USR_START=$(($USR_START + 8 - ($USR_START % 8)))
EXTENDED_SIZE=$(($USR_START + $USR_SIZE - $EXTENDED_START))
# #
# Generate the partitions using sfdisk to partition the # Generate the partitions using sfdisk to partition the
@ -256,8 +259,11 @@ cat ${IMG_DIR}/input | grep "^\./home/\|^. " | sed "s,\./home,\.,g" | ${CROSS
# #
# Generate /root, /usr and /home partition images. # Generate /root, /usr and /home partition images.
# #
echo " - ROOT"
${CROSS_TOOLS}/nbmkfs.mfs -b $((${ROOT_SIZE} / 8)) ${IMG_DIR}/root.img ${IMG_DIR}/root.proto ${CROSS_TOOLS}/nbmkfs.mfs -b $((${ROOT_SIZE} / 8)) ${IMG_DIR}/root.img ${IMG_DIR}/root.proto
echo " - USR"
${CROSS_TOOLS}/nbmkfs.mfs -b $((${USR_SIZE} / 8)) ${IMG_DIR}/usr.img ${IMG_DIR}/usr.proto ${CROSS_TOOLS}/nbmkfs.mfs -b $((${USR_SIZE} / 8)) ${IMG_DIR}/usr.img ${IMG_DIR}/usr.proto
echo " - HOME"
${CROSS_TOOLS}/nbmkfs.mfs -b $((${HOME_SIZE} / 8)) ${IMG_DIR}/home.img ${IMG_DIR}/home.proto ${CROSS_TOOLS}/nbmkfs.mfs -b $((${HOME_SIZE} / 8)) ${IMG_DIR}/home.img ${IMG_DIR}/home.proto
# #