On Wed, 20 Feb 2002, Ralf Baechle wrote: > The context register is actually intended to be used for indexing a flat > 4mb array of pagetables on a 32-bit processor. It's a bit ill-defined > on R4000-class processors as it assumes a size of 8 bytes per pte, so > cannot be used in the Linux/MIPS kernel without shifting bits around. Ill??? I think someone was just longsighted enough not to limit PTEs to 38-bit physical addresses. A shift costs a single cycle if we want to save memory. -- + Maciej W. Rozycki, Technical University of Gdansk, Poland + +--------------------------------------------------------------+ + e-mail: macro@ds2.pg.gda.pl, PGP key available +
