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

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@jcrosoft.com To: wd@denx.de; xubin0712@hotmail.com CC: u-boot-users@lists.sourceforge.net

Le 5/10/07 1:02, « Wolfgang Denk » wd@denx.de a écrit :

...

In message BAY124-W1322E27AA87E199D7EB970A3A80@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

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