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

[Bin Xu]

Hi, Jean and Wolfgang ,

Thanks a lot for your reply.

I think there is some problem here. For boot method 1, the kernel image is in NAND and file system in hard drive; for boot method 2, the kernel image and file system is also in the same nand. so if there are some problems with the hard drive, the system is already booted, passed uboot and kernel image loading procedure, and will hang with the hard drive filesystem, while the uboot won't know this.

So maybe I have to consider Jean's suggestion...

Any comments?

Thanks and Regards,

Bin


> Date: Fri, 5 Oct 2007 01:19:45 +0200
> Subject: Re: [U-Boot-Users] is it possible to make the booting sequence in U-boot?
> From: plagnioj at jcrosoft.com
> To: wd at denx.de; xubin0712 at hotmail.com
> CC: u-boot-users at lists.sourceforge.net
> 
> 
> 
> 
> Le 5/10/07 1:02, « Wolfgang Denk » <wd at denx.de> a écrit :
> 
> > In message <BAY124-W1322E27AA87E199D7EB970A3A80 at phx.gbl> you wrote:
> >> 
> >> Thanks a lot! But I am not sure, is there the "if " command in uboot? I rea
> >> d the manual and did not find it. I am just work on it for a few weeks, so.
> >> ..
> > 
> > Yes, there is, if you configure the hush shell as command line parser.
> > 
> > But then:
> > 
> >>>     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
> > 
> > This is overly complex and not needed at all.
> Complex, maybe but its allow you to known the current state of your boot
>  and it just a timeline algo not script
>  the run boot_nand; run boot_flash;print $error_message
> 
>   Can be represent as fallow
> 
>     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
>                      Banzai System Start
>                      endif
>                  endif
>          else
>                Banzai System Start
>          endif
> 
> > 
> > Best regards,
> > 
> > Wolfgang Denk
> 
> 

_________________________________________________________________
Help yourself to FREE treats served up daily at the Messenger Café. Stop by today.
http://www.cafemessenger.com/info/info_sweetstuff2.html?ocid=TXT_TAGLM_OctWLtagline
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.denx.de/pipermail/u-boot/attachments/20071004/89a3ce1a/attachment.htm