[Dockstar]Multiboot from different partitions with Uboot?

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[Dockstar]Multiboot from different partitions with Uboot?

Postby sambul13 » Fri Aug 24, 2012 11:29 pm

How to make Uboot present a list of boot choices at boot allowing to pick a certain partition to boot from? Kind of multiboot system on DockStar to test new kernels?

The thread U-Boot environment variables for Sheevaplug multi-boot version is a jam suggesting several methods to set it up on Sheeva. Can the same thing be applied to Dockstar? Anyone wants to write up a detail HowTo and config examples?
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Re: [Dockstar]Multiboot from different partitions with Uboot

Postby WarheadsSE » Sat Aug 25, 2012 2:22 am

You would be required to have a serial terminal.
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Re: [Dockstar]Multiboot from different partitions with Uboot

Postby sambul13 » Sat Aug 25, 2012 2:29 am

For updating Uboot config once, or selecting the boot partition every time?
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Re: [Dockstar]Multiboot from different partitions with Uboot

Postby WarheadsSE » Sat Aug 25, 2012 2:32 am

"present a list of choices" requires someone respond that presented list.
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Re: [Dockstar]Multiboot from different partitions with Uboot

Postby sambul13 » Sat Aug 25, 2012 2:34 am

It may be a stupid question, but why it can't be done via regular terminal? :roll:
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Re: [Dockstar]Multiboot from different partitions with Uboot

Postby WarheadsSE » Sat Aug 25, 2012 2:37 am

I'm about to clubat your *****.

There is no "regular terminal" on these devices other than a 3.3v serial terminal. Uboot environment can be modified rather simply by the documented tools. This is your bootloader however, so if you break it, you will have NO OTHER CHOICE but to hook up a serial line.

If you want directed guidance, see forum.doozan.com
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Re: [Dockstar]Multiboot from different partitions with Uboot

Postby sambul13 » Sat Aug 25, 2012 2:44 am

Thanks WarheadsSE,

This is the 1st time I modded such device, and it looks like the expectation to support the same popular features I am used to with a regular PC, do not (easily) apply here. :lol:

Here's detail Uboot Guide that may be helpful for inquisitive minds. :o
Last edited by sambul13 on Thu Aug 30, 2012 1:52 pm, edited 2 times in total.
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Re: [Dockstar]Multiboot from different partitions with Uboot

Postby sambul13 » Wed Aug 29, 2012 9:07 pm

Multiboot using u-boot blog describes one approach to setup a mutiboot environment with Uboot. Choosing the OS to boot is done in netconsole by interrupting the default boot sequence and selecting desired OS from a predefined list. It allows to keep several drives with multiple OSs connected to an ARM device, while picking to boot a new ArchLinux release or DebianSqueeze, or whatever OS mod you want to work with on any partition any time, and easily add new OS entries to the list.
Last edited by sambul13 on Thu Aug 30, 2012 4:01 am, edited 2 times in total.
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Re: [Dockstar]Multiboot from different partitions with Uboot

Postby moonman » Thu Aug 30, 2012 1:30 am

Netconsole is the same thing as serial (in regards to functionality..)
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Re: [Dockstar]Multiboot from different partitions with Uboot

Postby cyberic » Thu Aug 30, 2012 12:51 pm

In the manual, then put in the prerequisites:
"Two or more bootable SD Card configured to boot above OS"
two sd cards??
it should be possible to boot from different partition of the same card, isn't it?
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