Hi Holger, I was just wondering how you got on with Venray and Atomthreads in the end? Did the processor hit the road?
Best regards, Kelvin. On 2 November 2012 08:12, Holger Teutsch <holger.a.teut...@gmail.com> wrote: > Kelvin, > > > On Fri, Nov 2, 2012 at 12:51 AM, Kelvin Lawson <i...@atomthreads.com> wrote: >> >> >>> The target processor is 64bit and unfortunately the entry_param is >>> hardwired to 32bit. So it's not possible to pass a pointer in a clean way. >>> >>> >>> Wouldn't it be better to define a port specific ENTRY_PARAM_TYPE like >>> POINTER ? >> >> >> Yes, this makes sense. I've added an issue on Github and will try to get >> this into the next release. > > Great ! >> >> >> Does the full test suite pass? Are you interested in submitting your port >> to the project? Don't feel like you have to of course, but new architectures >> are always interesting so I thought I'd ask :-) > > > Yes, the full test suite passes. > The most complicated task in porting was to adjust the stack sizes of the > test suite so the stack wasn't overrun *before* stack checking could detect > it 8-) . > > Another idea came to my mind then: > What about > > add a field "POINTER stack_limit" to the TCB. E.g. for an architecture with > "stack grows downwards" that describes the bottom of the stack. > the architecture dependent task switcher could do a rather *cheap* overrun > check when switching stacks on *each* switch > the port can put a magic word there or just compare pointers on its own > discretion > that is much less overhead (and of course a much less rigorous checking) > than full stack checking but it's frequent > these extra fields could be added by a preprocessor macro e.g. > PORT_TCB_EXTRA_FIELDS. That would avoid permanent overhead for all ports. > > > Right now the processor is for demonstrating Venray's IP and currently it's > all simulated (cgen, gdb's sim, sid & friends). When the processor hits the > road will submit the port for sure. > > Thank you for creating and sharing atomthreads. > > Regards > Holger > >
