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

[Bin Xu]

This one sounds great! I will try this one first, and will get the feedback here, thanks a lot!

Regards,

Bin

> To: xubin0712 at hotmail.com
> CC: u-boot-users at lists.sourceforge.net
> From: wd at denx.de
> Subject: Re: [U-Boot-Users] is it possible to make the booting sequence in U-boot?
> Date: Fri, 5 Oct 2007 00:32:38 +0200
> 
> In message <13049956.post at talk.nabble.com> you wrote:
> > 
> > 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?
> 
> This is possible, and actually trivial.
> 
> Define two environment variables, say "boot_disk" and "boot_nand"  to
> boot  from disk or NAND, respectively, such that "run boot_disk" will
> perform a disk boot the way you want it,  and  "run  boot_nand"  will
> boot form NAND.
> 
> Then define "bootcmd" as "run boot_disk;run "boot_nand".
> 
> That's all.
> 
> See also the manual for additional bells and whistles like watchdog
> support, boot counter etc.
> 
> Best regards,
> 
> Wolfgang Denk
> 
> -- 
> DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
> HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
> Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
> "Life and death are seldom logical."
> "But attaining a desired goal always is."
> 	-- McCoy and Spock, "The Galileo Seven", stardate 2821.7

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