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

[Bin Xu]

Hi, Jean,

Thanks a lot! But I am not sure, is there the "if " command in uboot? I read the manual and did not find it. I am just work on it for a few weeks, so...

Thanks and Regards,

Bin


> Date: Fri, 5 Oct 2007 00:30:42 +0200
> Subject: Re: [U-Boot-Users] is it possible to make the booting sequence in U-boot?
> From: plagnioj at jcrosoft.com
> To: xubin0712 at hotmail.com; u-boot-users at lists.sourceforge.net
> 
> 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
> 
> 

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