Re: Getting Atmel AT91SAM9 into eCos

[Evgeniy Dushistov <dushistov@mail.ru>]

On Tue, Feb 23, 2010 at 09:53:28AM -0700, Gary Thomas wrote:
> On 02/23/2010 03:01 AM, Evgeniy Dushistov wrote:
> > On Tue, Feb 23, 2010 at 09:26:15AM +0000, John Dallaway wrote:
> >> Hi Daniel, Evgeniy and eCos maintainers
> >>
> >> Daniel Helgason wrote:
> >>
> >>> I have seen many messages on the eCos mailing lists about getting
> >>> AT91SAM9 support into eCos. I'm writing directly to you in hopes of
> >>> getting some movement on this. I know this is off the mailing list but I
> >>> wanted to get initial input directly from people whose opinions I have
> >>> come to respect before I add yet another message to the mailing list
> >>> about this subject.
> >>
> >> [ snip ]
> >>
> >>> If there was ever a time to consider pushing the AT91SAM9 devices into
> >>> eCos, this could be it! I am asking you for your thoughts on how to
> >>> proceed from here. Thanks!
> >>
> >> I am not an expert on ARM7/ARM9 differences but there are several eCos
> >> maintainers who have experience with multiple ARM variants and are well
> >> positioned to review the AT91SAM9 patch. I do not think motivation
> >> should be an issue here. We all wish to see eCos move forward and
> >> AT91SAM9 support is clearly very good for the project.
> >>
> >> My main concern is that we don't break eCos support for older ARM
> >> platforms in the process of improving the hardware abstraction for
> >> future platform ports.
> >>
> >
> > Actually, I and Filip Navara implemented AT91SAM7X and at91sam9263
> > support for qemu, one of the most recent version can be found here:
> > git://github.com/Dushistov/qemu_at91sam9263.git
> > It can run linux, freertos, ecos.
> >
> > So if there is interest, I can create binaries of qemu for linux OS,
> > so maintainers who have sam7 hardware, but have no sam9, or
> > vice versa, or completly have no development boards can run
> > and test eCos.
> 
> How do you configure Qemu to run eCos on these platforms?
> 
Get sources of qemu from git url above, then
./configure --target-list="arm-softmmu arm-linux-user armeb-linux-user"
&& make

To run eCos on at91sam9263, you need something like
./arm-softmmu/qemu-system-arm  -serial tcp::4445,server -M at91sam9263ek
-pflash ../pflash-redboot.img &
#to get access to dbgu port
telnet localhost 4445 

pflash-redboot.img is image 8M nor flash, it can be created by:
qemu-img create pflash-redboot.img 8M
dd if=redboot.bin of=pflash-redboot.img ...

For at91sam7x things little simplier, you need something like:
./arm-softmmu/qemu-system-arm  -serial tcp::4445,server -M at91pes
-kernel <name>.elf

you can run qemu with "-s -S" and connect to it using arm-eabi-gdb to 
port 1234.

-- 
/Evgeniy