Hi Hesham, Thanks for the info.
On Wed, Aug 20, 2014 at 3:10 PM, Hesham Moustafa <heshamelmat...@gmail.com> wrote: > Hi Ritesh, > > On Wed, Aug 20, 2014 at 11:28 AM, Ritesh Harjani > <ritesh.harj...@gmail.com> wrote: > > 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 ? > > > Some of my project code has been merged (mainly low-level parts of > libmm implemented for Raspberry Pi). The other code is held in my old > github repo here https://github.com/heshamelmatary/rtems-gsoc2013 Thanks for the info, but I was unable to find mmtest in your git repo too. I saw in here: testsuites/libtests/ > > 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 ? > > > I was using QEMU for debugging Xilinx Zynq BSP, as well as Realview. > For Raspberry Pi (worked on the HW board, no simulators), I just used > printf to print out the values of registers which I need to peek into. > Ya, with print help I was able to get the values of control and aux control register. So, by default L1 and L2 caches are enabled, also MMU is enabled :) *For reference:* Control register: 0x2085117d Aux control register: 0x7 > > > > > > 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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