On Thu, 5 Aug 2010 15:41:35 +0200, Lasse Skov lasko@kk-electronic.com wrote:
Hi
Im working on a target where I use the u-boot and think a little about good techniques for upgrade the BSP on the target and to make it fails saft.
Is ther any helpeful things I can use in uboot for this.?
My plan is to split my flash I 4 levels.
High Filesystem BSP_2 BSP_1 uBoot Low
And then let uBoot make a checksum on BSP_2 and boot this. If it's not is possible then boot BSP_1.
Another option is to build in a telnet session or something in the bootloader so ist possible to upgrade remote on only a Ethernet
connection.
But it think the best is to keep the bootloader "simple".
/Lasse
You could add a command to u-boot to do checksum stuff and store the result in an environment variable. Then you have the boot command be something like:
bootcmd='check_boot; bootm $(pref_bsp_addr)'