Skip to contentSkip to conversation

Extending bootm command.

U-Boot-Users Steven Scholz 2 participants 4 messages Sep 29, 2003 – Oct 8, 2003

lore
Share & tools
lore

Steven Scholz

author
#0 lore raw

Hi there,

from time to time it might be necessary to (decompress and) copy some data from flash to ram.

The configuration data for an Altera ACEX 1K FPGA for instance is about 163KB. The gzipped file (for a quite complex design) is only 54kB. So instead of wasting three flash sectors one could store a gzipped and mkimage wrapped version of the data in flash. If calling mkimage with the type STANDALONE like
[1] proposes one could then use "bootm" to decompress and copy these data to ram. In order to call "fpga load" afterwards one need the location and the resulting size of the data. That is why I suggest the following patch:

* Patch by Steven Scholz, 29 Sep 2003:
- A second parameter for bootm overwrites the load address for "Standalone Application" images.
- bootm sets environment variable "filesize" to the resulting data lenght for "Standalone Application" images when autostart is set to "no".

Then one could do something like

if bootm $fpgadata $some_free_ram ; then

	fpga load 0 $some_free_ram $filesize ;

fi

Cheers,

Steven

[1] https://www.denx.de/twiki/bin/view/DULG/HowCanILoadAndUncompressACompressedImage

-------------- next part --------------
An embedded and charset-unspecified text was scrubbed...
Name: bootm_ext.patch
Url: http://lists.denx.de/pipermail/u-boot/attachments/20030929/13303943/attachment.txt

author
#1 lore raw
Quoted 13 lines · Steven Scholz

...
from time to time it might be necessary to (decompress and) copy some data from
flash to ram.
...

* Patch by Steven Scholz, 29 Sep 2003:
- A second parameter for bootm overwrites the load address for "Standalone Application" images.
- bootm sets environment variable "filesize" to the resulting data
lenght
for "Standalone Application" images when autostart is set to "no".

Quoted 5 lines

Then one could do something like

if bootm $fpgadata $some_free_ram ; then

    fpga load 0 $some_free_ram $filesize ;

fi

Any comments on that?

Thanks,

Steven

#2 lore raw

Dear Steven,

Quoted 8 lines · in message <[email protected]> you wrote:
Quoted 6 lines

Then one could do something like

if bootm $fpgadata $some_free_ram ; then

    fpga load 0 $some_free_ram $filesize ;

fi

Any comments on that?

I think Detlev already ACKed that this is a good thing to do.

It's in "The Queue" - sorry, I'm just back from vacation and there is a _huge_ backlog.

Best regards,

Wolfgang Denk

Signature · 6 lines
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-4596-87  Fax: (+49)-8142-4596-88  Email: wd at denx.de
That Microsoft, the Trabant of the operating  system  world,  may  be
glancing  over the Berlin Wall at the Audis and BMWs and Mercedes. In
their own universe Trabants and Ladas were mainstream too...
                                                   -- Evan Leibovitch
#3 lore raw
In reply to Steven Scholz
Quoted 6 lines · In message <[email protected]> you wrote:

* Patch by Steven Scholz, 29 Sep 2003:
- A second parameter for bootm overwrites the load address for "Standalone Application" images.
- bootm sets environment variable "filesize" to the resulting data lenght for "Standalone Application" images when autostart is set to "no".

Thanks, added. Will show up on CVS soon.

Best regards,

Wolfgang Denk

Signature · 4 lines
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-4596-87  Fax: (+49)-8142-4596-88  Email: wd at denx.de
Virtue is a relative term.
	-- Spock, "Friday's Child", stardate 3499.1