[ECOS] Status of AT91RM9200 Port ?

[ECOS] Status of AT91RM9200 Port ?

[Wolfgang Köbler]

Hi,

I am interested in a AT91RM9200 Port of ecos & redboot. (I know that there is
a port from ecoscentric, but I am interested in a free one.)
I have searched the mailinglist archive of ecos-discuss for AT91RM9200.

Status:
I have found an old porting effort from 2003
http://sourceware.org/ml/ecos-discuss/2003-11/msg00416.html
What is the status of that port ?

I have found a new porting effort at
http://sourceware.org/ml/ecos-discuss/2005-06/msg00263.html
What is the status of that port ?

Beyond that I have found several people who are (or were) interested in such
a port. I have CCed this mail to them.


What I have done so far:
I am an experienced programmer but relatively new to both ARM and eCos. I
have spent some time reading manuals (ecos, at91rm9200, gcc, ...) + sources
and searching the web. I have a lomx arm board
(http://www.lomx.net/en/lom_arm9_project.htm). I successfully compiled
the atmel-bootloader (gcc version) from
http://www.teest.com/at91/romboot.tar.gz (with minor modifications) with the
gcc from http://ecos.sourceware.org/getstart.html. I could
download and run it via xmodem (minicom &
http://www.koansoftware.com/en/art.php?art=68 ).


What I want:
Currently I would be content with redboot booting from spi dataflash and
talking to ethernet, no mmu required.


I would like to participate in porting redboot/ecos to at91rm9200. How can I
help ? Is there anything (incomplete) I can test or use ?


BTW: There was an "MMU question - AT91RM9200" some time ago. An advice said
one should map RAM to virtual address 0x0. There are two options for this:
You can map SDRAM or internal SRAM to 0x0 (or external SRAM). The "default" is
internal SRAM, so the big SDRAM can be mapped somewhere else (e.g. 1-to-1
logical to physical map should be possible).


Bye,
Wolfgang


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