On Tue, 30 Sep 2003, Ralf Baechle wrote: > > What would be the downside to enabling 64 bit operations in user space > > on a 32 bit kernel (setting the PX bit in the status register?). The > > particular issue is that I want to access 64 bit-memory mapped registers, > > and I really need to do it as an atomic operation. I tried borrowing > > sibyte/64bit.h from the kernel, but I get an illegal instruction on the > > double ops. > > Common design bug in hardware, imho ... Well, ioremap() can be used to get at these areas (as well as any others), whether we call it a bug or not. -- + Maciej W. Rozycki, Technical University of Gdansk, Poland + +--------------------------------------------------------------+ + e-mail: macro@ds2.pg.gda.pl, PGP key available +
