On 21/12/2019 19:26, Niteesh wrote: > There is already a PL011 driver in the arm shared section. should we > just import it?
If you say "import" and you mean "use" and not "copy": yes, that would be great. > > On Sat, Dec 21, 2019 at 10:46 PM Niteesh <gsnb...@gmail.com > <mailto:gsnb...@gmail.com>> wrote: > > Shall I start writing a driver for raspberrypi3 PL011? > > > On Sat, Dec 21, 2019 at 8:40 PM Christian Mauderer > <l...@c-mauderer.de <mailto:l...@c-mauderer.de>> wrote: > > On 19/12/2019 15:05, Christian Mauderer wrote: > > On 19/12/2019 14:27, Sebastian Huber wrote: > >> On 19/12/2019 14:24, Christian Mauderer wrote: > >>> Hello, > >>> > >>> triggered by the discussion regarding RTEMS on raspberrypi 3 > I did some > >>> tests. I haven't been able to start a RTEMS on my Pi 1 if I > tried a > >>> version after commit > c5fd79cd4704a4270ba0114a1009ab8556f997c9 from > >>> 29.07.2019. Right before it everything works as expected. > >>> > >>> The commit changes the memory locations. From what I > understood, the > >>> bootloader on a raspberry always jumps to address 0x8000 > after loading > >>> the application. So I'm not convinced that the change is > correct. > >> > >> Is the 0x8000 a fixed address or you configure this in a boot > image header? > >> > > > >>From what I've seen the bootloader just uses a fixed address. > All guides > > that I've found just use objcopy to generate a binary from the > elf files > > without adding a header. For example a guide for RTEMS: > > > > > > > > http://alanstechnotes.blogspot.com/2013/03/running-your-first-rtems-program-on.html > > > > A FreeRTOS port mentions this behavior explicitly in a comment > in the > > linker file: > > > > > > > > https://github.com/jameswalmsley/RaspberryPi-FreeRTOS/blob/master/raspberrypi.ld#L17 > > > > The "graphics processor" is no typo here. It seems the > initialization is > > really done by the graphics processor on the pi. > > _______________________________________________ > > devel mailing list > > devel@rtems.org <mailto:devel@rtems.org> > > http://lists.rtems.org/mailman/listinfo/devel > > > > I just found an option: It is possible to set a "kernel_address" > in the > config.txt: > > > > https://www.raspberrypi.org/documentation/configuration/config-txt/boot.md > > So the start address can be changed and maybe the adaption to > the linker > file isn't necessary. > _______________________________________________ devel mailing list devel@rtems.org http://lists.rtems.org/mailman/listinfo/devel
