I did all my beaglebone black development from a remote ubuntu desktop and tested images using netboot and a serial console. The netboot was slightly slow but it avoided having to write any flash or sd cards, and I didn't have to constantly boot into and out of a dev environment. Instructions for netbooting sel4 on the bbone black are on the website: https://sel4.systems/Info/Hardware/Beaglebone/ On Wed, Jan 6, 2016 at 3:01 PM, Tom Mitchell <mitch@niftyegg.com> wrote:
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.
<https://sel4.systems/lists/listinfo/devel>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.htm... 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
-- T o m M i t c h e l l
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