> > > Even on a CPU with 36-bit physical address? ;-) > > > > Nope. This is one problem for example with ioremap on a Pentium Pro. > > Well, but we only consider MIPS processors here which do not have such > odd restrictions resulting from bad design decisions in the past. ;-) > The 32-bit TLB entry format allows for up to 36 bits of the physical > address space (34 bits if support for the page size of 1kB has been So does the Pentium Pro. We can map 36bit physical addresses. > enabled). For anything beyond that you need a 64-bit MIPS processor using > the 64-bit TLB entry format. Your problem is a little higher up the stack. ioremap takes an unsigned long, which on a 32bit system usually means you can't give it a 36bit bus address to remap. Alan
