On Wednesday 25 January 2012 19:02:45 Marek Vasut wrote: > > This patch adapts the bootm command so that it can use an existing atags > > command set up by a previous bootloader. > > Why do you need it?
Default Nokia kernel has patches which using non-standard atags for reporting bootmode, bootreason, hw-rev, NOLO version, boot count, ... Closed-source Maemo application need to know these properties (read via /proc/bootreason, ...) and will restart device if there is error. So U-Boot must can reuse old atags from NOLO and tell it new kernel. > > > If the environment variable > > "atagaddr" is unset, bootm behaves as normal. If "atagaddr" is set, bootm > > will use atags address from environment variable and also append new boot > > args (if specified in u-boot). For example, if a previous boot loader > > already set up the atags struct at 0x80000100: > > > > setenv atagaddr 0x80000100; bootm 0x80008000 > > Can't you set those atags correctly in uboot? > No, because atags are not static (e.g bootreason). -- Pali Rohár pali.ro...@gmail.com
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