lkml.org 
[lkml]   [2010]   [Jun]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] x86/sfi: fix ioapic gsi range
On 06/08/2010 01:10 AM, Alan Cox wrote:
>>> You may not use a 1-1 mapping if you don't have legacy irqs. Linux
>>> irqs 0-15 are the ISA irqs you may not use those irq numbers for
>
> Linux IRQ 0 is "no IRQ assigned", except buried in certain bits of arch
> specific historical knowledge.
>
> Also calling 1-15 ISA IRQ lines is also somewhat misleading given they
> are almost certainly routing for PCI devices. "PIC IRQ routing" maybe -
> but even that is not really true on a lot of PC hardware today except by
> convention.

Yes, but I gather IRQ/GSI 0 is an early-acquire primary timer on MRST on
Moorestown just as on PC/AT... just a different one. Hence "special" in
the same sort of way. I don't really care, personally, though.

-hpa



\
 
 \ /
  Last update: 2010-06-08 20:13    [W:0.129 / U:12.704 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site