Info regarding development activity in RTEMS for ARM bsps/Raspberry pi

[Ritesh Harjani]

Hi All,

I have been following RTEMS from quite some time rather I would say my
questions have been on & off from this community (although I haven't
contributed anything yet). So, this mail is mainly regarding some help from
the community members so that I can pitch in to contribute something to
this community.

Based on my knowledge I would like to start from ARM bsps/raspberry pi as I
am seeing quite lot of development activity going on in these areas.

*If someone can guide me with the following activities it would be great: *

1. I need to just start something, may be with a small patch (which should
be related to the above mentioned area):
Earlier I thought of starting with some driver development but without
having basic knowledge of RTEMS file structure/other areas, I wasn't able
to complete it.

2. Need to understand the boot flow and the code initialization routine
which can give me an idea as to where all and what all drivers are present
etc etc..


Later may be I can think of porting/developing some driver for any ARM bsp.


*Background activity done till now: *

1. Followed all the steps in Alan's Blog (
http://alanstechnotes.blogspot.in/2013/03/running-your-first-rtems-program-on.html):

I was able to run ticker.exe sample test on Raspberry pi. Although there
are some doubts which I have asked below.

2. Ordered OpenOCD based JTAG board. Once this comes I will make this JTAG
board start working.


*Queries: *
1. Is by default raspberry pi MMU enabled and all the page table are setup
?(from HEAD of git://git.rtems.org/rtems.git)

2. I cannot see any libmmu tests which I think Hesham developed during GSOC
2013 ?
Do we keep this into different git ?

3. With OpenOCD and gdb is it possible to see all the CP15 coprocessor
registers on ARM ?

4. How was Hesham able to debug and see the MMU register settings(like
SCTLR.MMU) during his work on GSoc 2013 libmmu development for raspberry pi
? Was it QEMU ?



Please feel free to guide me through the work plan if anyone have in
his/her mind for ARM bsps.



Thanks
Ritesh Harjani
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