Messages in this thread |  | | | Date | Wed, 09 Jan 2008 10:18:11 -0800 | | From | "H. Peter Anvin" <> | | Subject | Re: [linux-kernel] Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay override. |
| |
Zachary Amsden wrote: > > I'm speaking specifically in terms of 64-bit platforms here. Shouldn't > we unconditionally drop outb_p doing extra port I/O on 64-bit > architectures? Especially considering they don't even have an ISA bus > where the decode timing could even matter? >
Why should the bitsize of the CPU matter for this? It seems one of the less meaningful keys for this.
Second, as I have mentioned, I don't believe this is really the case, especially not for the PIT, which is still present -- the PIT *semantics* has explicit timing constraints.
Third, you still have ISA devices, they're just called LPC or PC104 devices these days.
-hpa
|  |