On Wed, 9 May 2001, Jun Sun wrote: > The PCI IO space essentially extends the ISA bus, which effectively removes > the 0xffff limits. Note that while there is usually no problem with using addresses beyond 64kB in the PCI I/O space, certain PCI-to-PCI bridges may not pass such accesses across. So it's best to avoid assigning and using them. That's why Linux remaps "high" I/O space resources on Alpha, which get set up for some systems by the SRM console (firmware), e.g. in the system I was using a few years ago, SRM used to assign addresses around 0x11000 and 0x12000 for the onboard network and SCSI devices, IIRC. -- + Maciej W. Rozycki, Technical University of Gdansk, Poland + +--------------------------------------------------------------+ + e-mail: macro@ds2.pg.gda.pl, PGP key available +
