[U-Boot] FDT without FIT?

[U-Boot] FDT without FIT?

[Simon Schwarz]

Hi list,

I'am a bit stuck here.

How can FDT be used without a FIT image?

I can't really get this from the code - if someone can point me in the 
right direction this would be great!

Thanks!
Simon

[U-Boot] FDT without FIT?

[Wolfgang Denk]

Dear Simon Schwarz,

In message <4E53C9F6.4010609@gmail.com> you wrote:
> 
> How can FDT be used without a FIT image?

I don't understand this question - using the FDT and the image format
are orthogonal to each other.

> I can't really get this from the code - if someone can point me in the 
> right direction this would be great!

Try:
	help bootm

For example:

	tftp 600000 uImage
	tftp 900000 board.dtb
	bootm 600000 - 900000

What exactly is your problem?

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
"Unix is simple, but it takes a genius to understand the simplicity."
					             - Dennis Ritchie

[U-Boot] FDT without FIT?

[Simon Schwarz]

Dear Wolfgang Denk,

On 08/23/2011 07:45 PM, Wolfgang Denk wrote:
> Dear Simon Schwarz,
>
> In message<4E53C9F6.4010609@gmail.com>  you wrote:
>>
>> How can FDT be used without a FIT image?
>
> I don't understand this question - using the FDT and the image format
> are orthogonal to each other.
>
>> I can't really get this from the code - if someone can point me in the
>> right direction this would be great!
>
> Try:
> 	help bootm
>

This prints:
  # help bootm
bootm - boot application image from memory

Usage:
bootm [addr [arg ...]]
     - boot application image stored in memory
	passing arguments 'arg ...'; when booting a Linux kernel,
	'arg' can be the address of an initrd image

Sub-commands to do part of the bootm sequence.  The sub-commands must be
issued in the order below (it's ok to not issue all sub-commands):
	start [addr [arg ...]]
	loados  - load OS image
	cmdline - OS specific command line processing/setup
	bdt     - OS specific bd_t processing
	prep    - OS specific prep before relocation or go
	go      - start OS

(Yes, #define CONFIG_OF_LIBFDT 1 is in my board config)

> For example:
>
> 	tftp 600000 uImage
> 	tftp 900000 board.dtb
> 	bootm 600000 - 900000
>
> What exactly is your problem?
Thanks - john already pointed me to this. This works. It was/is just a 
problem with the help text - duno why..

>
> Best regards,
>
> Wolfgang Denk
>

Regards
Simon

[U-Boot] FDT without FIT?

[Wolfgang Denk]

Dear Simon Schwarz,

In message <4E54C961.70006@gmail.com> you wrote:
> 
> This prints:
>   # help bootm
> bootm - boot application image from memory
> 
> Usage:
> bootm [addr [arg ...]]
>      - boot application image stored in memory
> 	passing arguments 'arg ...'; when booting a Linux kernel,
> 	'arg' can be the address of an initrd image

You must either have a very old version of U-Bot, or one without FDT
support built in.

> > What exactly is your problem?
> Thanks - john already pointed me to this. This works. It was/is just a 
> problem with the help text - duno why..

Hm... I get this:

	=> help bootm
	bootm - boot application image from memory

	Usage:
	bootm [addr [arg ...]]
	    - boot application image stored in memory
		passing arguments 'arg ...'; when booting a Linux kernel,
		'arg' can be the address of an initrd image
===>		When booting a Linux kernel which requires a flat device-tree
===>		a third argument is required which is the address of the
===>		device-tree blob. To boot that kernel without an initrd image,
===>		use a '-' for the second argument. If you do not pass a third
===>		a bd_info struct will be passed instead

	Sub-commands to do part of the bootm sequence.  The sub-commands must be
	issued in the order below (it's ok to not issue all sub-commands):
		start [addr [arg ...]]
		loados  - load OS image
		ramdisk - relocate initrd, set env initrd_start/initrd_end
===>		fdt     - relocate flat device tree
		cmdline - OS specific command line processing/setup
		bdt     - OS specific bd_t processing
		prep    - OS specific prep before relocation or go
		go      - start OS


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
... bacteriological warfare ... hard to believe we were once foolish
enough to play around with that.
	-- McCoy, "The Omega Glory", stardate unknown