Ralf Baechle wrote: > > On Wed, May 09, 2001 at 10:35:12AM -0700, Jun Sun wrote: > > > Currently IO_SPACE_LIMIT is 0xffff, which is probably borrowed from the legacy > > i386 code. Let us remove that limit, so that each machine does not have to > > laboriously reset it. > > ISA? > > Ralf ISA bus? The PCI IO space essentially extends the ISA bus, which effectively removes the 0xffff limits. If you are really paranoid, we can do something like this: #if defined(CONFIG_ISA) && !defined(CONFIG_PCI) #define IO_SPACE_LIMIT 0xffff #else #define IO_SPACE_LIMIT 0xffffffff #endif Jun
