seL4 only provides the microkernel.

To use a storage device, you need a device driver process with the appropriate I/O privileges to access the device and its irq's.

Most likely, the filesystem would use a handle provided by the driver and use it to issue read/write requests.

I'm not aware of any such existing in practice at this time, but if you're looking to roll you rown that's probably how to do it



On Sat, Jul 2, 2016 at 10:14 AM, Stefan Wallentowitz <stefan@simless.com> wrote:
On 02.07.2016 18:49, Raymond Jennings wrote:
> In a microkernel you'd generally have a file system as a separate
> process interfacing with a block device driver through communication
> channels.

Yeah, but there is not support for any storage so far on one of the
supported boards, right? Is everything running from ramdisk then?

Cheers,
Stefan
--
Stefan Wallentowitz
Staff Engineer

Simless GmbH, Zweigstelle/Branch München
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