On 2010-05-14, at 14:44, M. Warner Losh wrote: > In message: <4becee31.3060...@gmail.com> > Vladimir 'φ-coder/phcoder' Serbinenko <phco...@gmail.com> writes: > : Yes and No. multiboot2 describes some aspects of the host system > : hardware but I've never heard of device trees outside of IEEE1275 or > : xnu, where it's probably a historical leftover. > > It is far from a historical left-over. Linux critically depends on > the boot loader on PowerPC to provide it with a tree of devices that > it cannot otherwise probe. On other architectures, it is becoming an > optional way to specify the device tree as well. There are many > different implementations of this, since primarily it is just data and > boot loaders are good at providing binary blobs to the kernel... > > In addition, Rafal Jawarski has ported this technology to FreeBSD. > He's presenting a paper on it today at BSDcan: > http://www.bsdcan.org/2010/schedule/events/171.en.html > I've reviewed the work, and it goes a long way towards making some of > the more stupid and repetitive parts of doing a port to a new embedded > architecture easy.
Yes, more on this can be found at the wiki page http://wiki.freebsd.org/FlattenedDeviceTree, there will also be a paper available as a post-conference material about this project. As of now we have flattened device tree support on 2 PowerPC platforms and 6 ARM-based systems already completed. Rafal _______________________________________________ Grub-devel mailing list Grub-devel@gnu.org http://lists.gnu.org/mailman/listinfo/grub-devel
