yocto-wic-issue

# The disk layout used is:
#  - -----   ---------------- ------------------ ------ -----------------------------------
# | | SPL | | rootfs-primary | rootfs-secondary | SWAP | data                              |
#  - -----   ---------------- ------------------ ------ -----------------------------------
# ^ ^       ^                ^                  ^      ^                                   ^
# | |       |                |                  |      |                                   |

# 0 1kiB      1500M            1500M              1000M  6000M
#

# NOTE: yocto adds 30% padding to the partition.
#       So --size and --fixed-size settings must
#       be 1/1.3 of the desired size.
#
# In practical terms, the option to specify this
# padding is --overhead-factor, which defaults to
# 1.3, if not specified.
#
# The specification below does not specify --overhead-factor.
# This means that the 1.5G size of rootfs is actually 1.96G,
# and the 1G size of swap is 1.3G. The entire disk image is
# (1.5G + 1.5G +  1G + 6G)*1.3 = 13G

part SPL   --ondisk mmcblk0 --source rawcopy --sourceparams="file=SPL" --no-table --align 1

# Setup rootfs to not be fixed-size
part /                 --ondisk mmcblk0 --fixed-size 1500M --align 4096 --label rootfs-primary   --fstype=ext4 --source rootfs --exclude-path=data/
part rootfs-secondary  --ondisk mmcblk0 --fixed-size 1500M --align 4096 --label rootfs-secondary --fstype=ext4 --source rootfs --exclude-path=data/

# Use --size instead of --fixed-size for swap as mkswap
# appears to require this option.  This option acts as
# a fixed size and shouldn't be resizeable.
part swap              --ondisk mmcblk0 --size 1000M       --align 4096 --label swap             --fstype=swap

# Setup data partition to be variable sized
# to expand/shrink to remaining disk
part /data             --ondisk mmcblk0 --size 6000M       --align 4096 --label data             --fstype=ext4

bootloader --ptable msdos