On Sat, Jan 2, 2016 at 10:18 AM, Julien Delange <julien.delange@gmail.com> wrote:
Dear all,

I am looking to purchase a board for a project that will use sel4.

I have the following hardware requirements:
- serial port
- ethernet
- potentially usb

Then, I want to run linux on top of sel4 and have also some native components.

 
The BBB does have a way to run from a uSD card as does the latest Raspberry Pi.
The programming and tools on the Raspberry Pi seem a bit richer.

The BBB environments want to program the flash memory and that can take
a long time.  There are some developer tricks to null it out and boot from a uSD
quickly.  

The R-Pi will boot a new uSD card image quickly.
The  new R-Pi has an abundance of USB ports so you can 
boot an OS on the uSD card and load a spare uSD image on
a card mounded on an adapter.  This allows quicker development
test cycles. 

Start with the bootstrap code and have it load a sel4 image (not vmlinux).
It is necessary to have enough support in sel4  to manage (start/stop) your 
hosted OS. 

Since the new R-Pi is multi core you can address MP or constrain yourself
to one single core.  Multiple cores have value if you want and OS to be
supervised.  

Both are interesting and I have both -- the R-Pi seems to be the best
supported at many levels with some foot notes.

http://www.xenproject.org/help/questions-and-answers/raspberry-pi-on-xen.html
http://blog.flexvdi.com/2015/02/25/enabling-hyp-mode-on-the-raspberry-pi-2/
 this next tells me that interrupts are a hardware problem.
http://www.gossamer-threads.com/lists/xen/users/369667




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