I'll look into it, thanks a lot ! On Mon, Jun 8, 2015 at 12:51 PM, Stefan Kalkowski < stefan.kalkow...@genode-labs.com> wrote:
> Hi Ofer, > > On 06/07/2015 12:40 PM, Ofer Hasson wrote: > > I managed to pass data, solved it using "ioremap_nocache", > > I think you should start with allocating the memory in an uncached > fashion instead of remapping it uncached (having the same memory region > with different memory attributes in the MMU can cause serious problems), > have a look at the 'dma_alloc_coherent' function within Linux. Moreover, > you can read this for further background: > http://linuxkernelhacker.blogspot.de/2014/07/arm-dma-mapping-explained.html > > > With regards to the restart, still no success. > > There is no restart mechanism implemented until now. The right place to > do this is the platform driver. You could extend the platform session > interface by a restart function. Then you can e.g. implement an input > driver client, or GPIO button client that triggers this function when > the key or button is pressed. To actually reset the board you should > have a look at the watchdog timer in Freescale's reference manual. > > Regards > Stefan > > > > > Thanks. > > > > On Sun, Jun 7, 2015 at 9:07 AM, Ofer Hasson <hasso...@post.bgu.ac.il> > wrote: > > > >> Hello, > >> > >> I'm trying to pass data between worlds, currently I'm allocating kernel > >> space buffer in the normal world (Linux), passing the address using r0 > >> register and the size using r1 register. > >> I manage to read the buffers reliably. > >> When I'm trying to change the buffers in the secure world, I don't see > the > >> change in the normal world, at first i thought there was some compiler > >> optimization issues, now I use -O0, next i thought this was CPU cache > >> issues and now i use "flush_kernel_kmaps()" but still nothing. > >> Any idea's on this issue ? > >> > >> Another question, how to i restart the board (iMX53) from genode code in > >> the secure world ? > >> > >> Thanks a lot > >> > > > > > > > > > ------------------------------------------------------------------------------ > > > > > > > > _______________________________________________ > > genode-main mailing list > > genode-main@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/genode-main > > > > -- > Stefan Kalkowski > Genode Labs > > http://www.genode-labs.com/ ยท http://genode.org/ > > > ------------------------------------------------------------------------------ > _______________________________________________ > genode-main mailing list > genode-main@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/genode-main >
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