We need a playground for experimenting with the 3.x architecture. I have set up a GIT tree for this purpose, which currently contains legacy removal and preliminary cleanup work I've been doing lazily during the past months, periodically rebasing on -head.
This tree is there for Xenomai hackers to work on radical changes toward Xenomai 3.x; this is NOT for production use. It is expected to be in a severe state-of-flux for several months from now on, until the updates on the infrastructure calm down. The plan is to work on this tree, until it makes sense to turn it into the official xenomai-3.0 tree eventually. Some CPU architectures currently supported in Xenomai 2.5.x may not be supported in this tree yet, until the dust settles, at some point (we do plan to support all of them eventually, though). The bottom line is to have powerpc (32/64), arm and x86 (32/64) available early; blackfin may be there early too, since their reference kernel tracks mainline closely as well. So this may leave us with nios2 lagging behind for a while. The same goes for RTOS emulators such as VxWorks, pSOS and friends. They have to be rebased on a new emulation core fully running in user-space we experimented with Xenomai/SOLO, so their legacy 2.x incarnations have been removed from the tree. This tree only features the POSIX, native and RTDM skins for now. The 3.x roadmap was published many moons ago on our web site , so I won't rehash the final goals for this architecture. However, the major development milestones can be outlined here: * legacy support removal (mainly: kernel 2.4 support and in-kernel skin APIs are being phased out, except the RTDM driver development API). * introduction of a new RTOS emulation core, which can run on top of the POSIX skin, or over the regular nptl. * port of the existing Xenomai/SOLO emulators (VxWorks, pSOS) over the new core. At some point, we shall decide whether it still makes sense to provide VRTX and uITRON emulators on this new core, given the lack of useful feedback we got for those for the past eight years. It seems that nobody cares for them actually. * integration of the missing bits to fully support our current dual kernel software stack over -rt kernels as well (i.e. no I-pipe), typically RTDM native. For sure, all theses tasks will entail various cleanup, streamlining, and sanitization activities all over the place, over time. The forge can be found at: git://git.xenomai.org/xenomai-forge.git Ok, just go wild now.  http://www.xenomai.org/index.php/Xenomai:Roadmap#Toward_Xenomai_3 -- Philippe. _______________________________________________ Xenomai-core mailing list Xenomaifirstname.lastname@example.org https://mail.gna.org/listinfo/xenomai-core