Hi Jeremy, A conventional device driver needs: 1) IRQ, 2) IO mapped registers and 3) DMA memory. You can get more details on those by: 1) Reading the seL4 manual [1], Chapter 8: Hardware I/O. 2) Follow sel4 tutorials [2], specifically hello-timer, to learn about how to use our seL4 libraries to work with a timer. 3) You can always have a look at already implemented seL4 drivers as a reference (e.g. ethernet [3], timers and serial [4]), and how they are being used in an actual project like sel4test [5] and sel4bench [6]. Feel free to ask any more questions, and thanks for your interest in seL4. [1] http://sel4.systems/Info/Docs/seL4-manual-latest.pdf [2] https://github.com/SEL4PROJ/sel4-tutorials [3] https://github.com/seL4/libethdrivers [4] https://github.com/seL4/libplatsupport [5] https://github.com/seL4/sel4test [6] https://github.com/seL4/sel4bench Cheers, Hesham On 21/06/17 21:40, Jheengut Pritvi wrote:

Ahh, This is a very interesting question.

On 21 June 2017 at 14:16, 杰尔米 <emerald0106@qq.com <mailto:emerald0106@qq.com>> wrote:

Hi all， I want to know more about the mechanism of device driver in seL4. How does seL4 support userspace drivers? if I want to write a driver(e.g. serial port) base on seL4, how to do that? can any one help?

Best Regards! Jeremy

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