Messages in this thread | | | From | "David S. Miller" <> | Date | Thu, 14 Jun 2001 13:56:21 -0700 (PDT) | Subject | Re: Going beyond 256 PCI buses |
| |
Jonathan Lundell writes: > It's easier in architectures other than IA32, in a way, since they > typically don't have the 64KB IO-space addressing limitation that > makes heavily bridged systems problematical on IA32 (one tends to > run out of IO space).
Right, I was even going to mention this.
But nothing stops an ia32 PCI controller vendor from doing what the Sun PCI controller does, which is to make I/O space memory mapped. Well, one thing stops them, no OS would support this from the get go.
Luckily, it would be quite easy to make Linux handle this kind of thing on x86 since other platforms built up the infrastructure needed to make it work.
Later, David S. Miller davem@redhat.com - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |