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

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 +21,33 @@ PACKAGE_ARCH = "${MACHINE_ARCH}"
 COMPATIBLE_MACHINE = "(artik5|artik10)"
 
 RDEPENDS_${PN} = "secure-boot-artik"
+
+do_compile_append() {
+    cp `find . -name "env_common.o"` copy_env_common.o
+    ${OBJCOPY} -O binary --only-section=.rodata `find . -name "copy_env_common.o"`
+    tr '\0' '\n' < copy_env_common.o | grep '=' | tee default_envs_emmc.txt default_envs_sd.txt > /dev/null
+
+    # our root partition is number 2 (exit with code 1 when no replacement done so we error out when upstream modifies the u-boot env)
+    sed -i '/rootpart=[0-9]\{1\}/{s//rootpart=2/;h};${x;/./{x;q0};x;q1}' default_envs_emmc.txt
+    sed -i '/rootpart=[0-9]\{1\}/{s//rootpart=2/;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}
+}