[U-Boot-Users] is it possible to make the booting sequence in U-boot?

[Jean-Christophe PLAGNIOL-VILLARD]

You can try to boot your first kernel image and if it does not found your
kernel switch to the other with the "if" command.

And if you have a watchdog you can incrise your ttl and if your system does
not boot in a predefine laps time you reboot and try your second image.

This the algo
    Set env try First
    Boot From First
        if not enter in entry point
            Set env try First
            Boot From second
                if not enter in entry point
                    Error Message No system available
                else
                    if watchdog timeout
                        Error Message No system available
                    else
                            Banzai System Start
                    endif
                endif
        else
            if watchdog timeout
                Error Message No system available
            else
                Set env try First
                Boot From second
                if not enter in entry point
                    Error Message No system available
                else
                    if watchdog timeout
                        Error Message No system available
                    else
                            Banzai System Start
                    endif
                endif
            endif
        endif
            

Best Regards
Le 5/10/07 0:17, « Bin » <xubin0712 at hotmail.com> a écrit :

> 
> 
> Hi, All,
> 
> I am trying to make two different booting methods with some booting sequence
> in u-boot, like the bios in PC does. Basically I have kernel Image 1 in NAND
> and File system 1 on hard drive, kernel image 2 and File system 2 also on
> the same NAND Flash. The goal here is try to boot the system from Image 1
> and file system 1 first, and if the hard drive fails, the bootloader
> (u-boot) will try to boot from Image 2 and File system 2 *automatically*. My
> question is, is it possible to achieve this in uboot? If so, any hints?
> 
> Any suggestions are appreciated.
> 
> Thanks and Regards,
> 
> Bin