u-boot-artik: Deploy parameters files for SD or eMMC images

ROOTPART variable can be overridden if rootfs is not in 2d partition of disk.

Bootloader files are also deployed,
and then could be used by image recipes/classes.

This change is merged from

https://github.com/resin-os/resin-artik/blob/master/layers/meta-resin-artik/recipes-bsp/u-boot/u-boot-artik.bbappend

Change-Id: I6762cb222f20a7552096d536002c2457f3024496
Credits-to: Florin Sarbu <florin@resin.io>
Bug: balena-os#9
Origin: http://github.com/TizenTeam/meta-artik
Signed-off-by: Philippe Coval <philippe.coval@osg.samsung.com>

recipes-bsp/u-boot/u-boot-artik.bb

@@ -21,3 +21,35 @@ PACKAGE_ARCH = "${MACHINE_ARCH}"
 COMPATIBLE_MACHINE = "(artik5|artik10)"
 
 RDEPENDS_${PN} = "secure-boot-artik"
+ROOTPART ?= "2"
+
+do_compile_append() {
+    cp `find . -name "env_common.o"` copy_env_common.o
+    ${OBJCOPY} -O binary --only-section=.rodata `find . -name "copy_env_common.o"`
+    tr '\0' '\n' < copy_env_common.o | grep '=' | tee default_envs_emmc.txt default_envs_sd.txt > /dev/null
+
+    # Set root partition's  number:
+    # exit with code 1 when no replacement done so we error out when upstream modifies the u-boot env
+    sed -i "/rootpart=[0-9]/{s//rootpart=${ROOTPART}/;h};\${x;/./{x;q0};x;q1}" default_envs_emmc.txt
+    sed -i "/rootpart=[0-9]/{s//rootpart=${ROOTPART}/;h};\${x;/./{x;q0};x;q1}" default_envs_sd.txt
+
+    # eMMC boots will default to "run mmcboot"
+    sed -i "s/bootcmd=.*/bootcmd=run mmcboot/g" default_envs_emmc.txt
+
+    # root device should be (mmcblk)1 when booting the SD card flasher image (exit with code 1 when no replacement done so we error out when upstream modifies the u-boot env)
+    sed -i '/rootdev=[0-9]\{1\}/{s//rootdev=1/;h};${x;/./{x;q0};x;q1}' default_envs_sd.txt
+
+    # add rootdelay for SD card boot (exit code 1 when no change so we error out when upstream modifies the u-boot env)
+    sed -i '/loglevel=[0-9]\{1\}/{s//& rootdelay=3/;h};${x;/./{x;q0};x;q1}' default_envs_sd.txt
+
+    # flasher image needs u-boot env file instructions for u-boot to flash the bootloader components for future eMMC boot
+    sed -i "s/bootcmd=.*/bootcmd=sdfuse format;sdfuse flash 1 fwbl1 bl1.bin;sdfuse flash 1 bl2 bl2.bin;sdfuse flash 1 bootloader u-boot.bin;sdfuse flash 1 tzsw tzsw.bin;run mmcboot/g" default_envs_sd.txt
+
+    tools/mkenvimage -s 16384 -o params_emmc.bin default_envs_emmc.txt
+    tools/mkenvimage -s 16384 -o params_sd.bin default_envs_sd.txt
+}
+
+do_deploy_append () {
+    install ${S}/params_emmc.bin ${DEPLOYDIR}
+    install ${S}/params_sd.bin ${DEPLOYDIR}
+}