Andrew Thomas said:
> Can someone out there who is running a linux kernel on an EBSA285
> board please explain how to take the vmlinux generated by 'make all'
> and get the thing to boot on an ebsa285 using tools which are publicly
> available. [Sorry if I sound frustrated only I'm trying to write my
> own boot loader (for linnux for an ebsa285) and is driving me cRaZYYY
> :-)]
Firstly, you should not be using the vmlinux file generated by 'make all'.
There is a binary image generated by 'make Image', called arch/arm/boot/Image
This is the file I use.
My EBSA285 is configured in Central Function mode, which means it is the
main processor in the system. This allows it to configure the PCI cards.
I also have an ethernet card, and a utility called 'angelboot' which can
be used to download programs over the serial port.
Initially, I wrote a small ethernet boot loader for the EBSA-110 board,
and I adapted it for use with the EBSA285. I frigged the build to get
the file to look like an AIF binary format which 'angelboot' will accept.
I downloaded this image which then in turn pulled the kernel off of
another machine via BOOTP and TFTP. Once the kernel was running, at
the earliest opportunity, I programmed this loader into the EBSA285's
flash at image 2.
Later, once the kernel was stable, I generated what is almost a BIOS for
EBSA825 boards, but it is very limited to the hardware - it only supports
Promise UDMA IDE cards, 3com 3c509 and (very limited number of) Tulip ether
cards, and a S3 Trio64V2 VGA card. I now have this programmed into flash
image 3, and it does all the hardware initialisation and kernel fetching.
Depending on what machines you have available, you will want to follow
a different path. I would recommend, if you have the ARM SDT, generating
a program to load the kernel either over the PCI bus (if you have it in
a PC), or if you only have a serial port and ethernet card, developing
a very small TFTP loader. I wouldn't recommend using the serial port
to transfer a large kernel - it'll take a long time to load it each
time.
I hope this helps.
> Note, the dos fmu tools etc. are available on Intels web site.
> (follow links from
> http://developer.intel.com/design/strong/sa-evaldownload.htm )
However, these are useless if you want to run them natively on the board
(they're only for x86 PCs or other CPUs, but not ARMs).
--
Russell King ([EMAIL PROTECTED])
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