images: Remove rootfs size limitation of 4GB with update scripts

Our current update procedure requires the rootfs payload to fit in
one file on a FAT filesystem. This limits its usable size to 4GB.
Use the process of splitting up the files in 64MB chunks and then
doing the update which is also what the Ethernet update scripts
currently follow.

However due to the workaround for u-boot counting in hex and split
did in decimal, the number of chunks is limited to 89 resulting in
a maximum size of 5.5GB. We will remove the limitation in a follow
up patch.

Signed-off-by: Sanchayan Maity <sanchayan.maity@toradex.com>
Signed-off-by: Max Krummenacher <max.krummenacher@toradex.com>

1 files changed, 5 insertions, 3 deletions

diff --git a/recipes-images/images/files/apalis-t30/apalis-t30_bin/flash_blk.scr b/recipes-images/images/files/apalis-t30/apalis-t30_bin/flash_blk.scr
index 44d98a2..d3ac2be 100644
--- a/recipes-images/images/files/apalis-t30/apalis-t30_bin/flash_blk.scr
+++ b/recipes-images/images/files/apalis-t30/apalis-t30_bin/flash_blk.scr
@@ -2,7 +2,9 @@ test -n ${interface} || setenv interface mmc
 test -n ${drive} || setenv drive 1
 
 setenv set_blkcnt 'setexpr blkcnt ${filesize} + 0x1ff && setexpr blkcnt ${blkcnt} / 0x200'
-setenv set_nextpos 'setexpr filepos ${filepos} + ${filesize}; setexpr blkstart ${blkstart} + ${blkcnt}'
+#workaround U-Boot counting in hex and split did in decimal
+setenv incr_decimal 'setexpr filenum ${filenum} + 1; setexpr filenrlow ${filenum} % 0x10; test ${filenrlow} -eq "a" && setexpr filenum ${filenum} + 0x6; true'
+setenv set_nextnum 'run incr_decimal; setexpr blkstart ${blkstart} + ${blkcnt}'
 
 setenv check_1 'setenv conf_blk_offset 0x1fff; mmc read ${loadaddr} ${conf_blk_offset} 1'
 setenv check_2 'setenv conf_blk_offset 0xfff; mmc read ${loadaddr} ${conf_blk_offset} 1'
@@ -17,7 +19,7 @@ setenv migrate_5 'mmc dev 0 0; mmc read ${loadaddr} 36000 1; setenv conf_blk_off
 setenv migrate_6 'mmc dev 0 0; mmc read ${loadaddr} 37000 1; setenv conf_blk_offset 0x7ff; crc32 -v ${toradex_oui_addr} 3 94305232 && mmc dev 0 1 && mmc write ${loadaddr} ${conf_blk_offset} 1'
 setenv migrate_configblock 'setexpr toradex_oui_addr ${loadaddr} + 8; run migrate_1; run migrate_2; run migrate_3; run migrate_4; run migrate_5; run migrate_6'
 
-setenv cp_file_chunk 'load ${interface} ${drive}:1 ${loadaddr} ${board_name}/root.ext3 ${filesize} ${filepos}; run set_blkcnt; mmc dev 0 0 && mmc write ${loadaddr} ${blkstart} ${blkcnt}'
+setenv cp_file_chunk 'load ${interface} ${drive}:1 ${loadaddr} ${board_name}/root.ext3-${filenum} ${filesize} ${filepos}; run set_blkcnt; mmc dev 0 0 && mmc write ${loadaddr} ${blkstart} ${blkcnt}'
 
 setenv update_uboot 'load ${interface} ${drive}:1 ${loadaddr} ${board_name}/${board_name}.img && run set_blkcnt && mmc dev 0 1 && mmc write ${loadaddr} 0x0 ${blkcnt}'
 
@@ -30,7 +32,7 @@ setenv update_configblock 'run check_configblock; load ${interface} ${drive}:1 $
 setenv update_1 'load ${interface} ${drive}:1 ${loadaddr} ${board_name}/mbr.bin && mmc dev 0 0 && mmc write ${loadaddr} 0x0 0x1'
 setenv update_2 'load ${interface} ${drive}:1 ${loadaddr} ${board_name}/boot.vfat && run set_blkcnt && mmc dev 0 0 && mmc write ${loadaddr} 0x2000 ${blkcnt}'
 #do it in chunks of 64M to fit into DDR RAM of the smallest module
-setenv update_3 'setenv filesize 4000000; setenv filepos 0; setenv blkstart a000; while test ${filesize} -eq "4000000"; do run cp_file_chunk; run set_nextpos; done'
+setenv update_3 'setenv filesize 4000000; setenv filenum 10; setenv blkstart a000; while test ${filesize} -eq "4000000"; do run cp_file_chunk; run set_nextnum; done'
 
 setenv echo_v2.3b2 echo "successfully updated U-Boot, power-cycle and enter \"run setupdate\; run migrate_v2.3b2\" to complete update"
 setenv migrate_v2.3b2 'run migrate_configblock; run update_new'