Re: can someone explain...[ PCI interrupts]

From: M. Warner Losh <imp_at_bsdimp.com>
Date: Wed, 07 Dec 2005 10:57:22 -0700 (MST)
In message: <018e01c5fafe$c9154a20$642a15ac_at_smiley>
            "Darren Pilgrim" <darren.pilgrim_at_bitfreak.org> writes:
: From: John Baldwin
: > 
: > The reason [for masking interrupts] is that PCI interrupts are level
: > triggered, so they won't "shut up" until the ISR has run and pacified
: > the PCI device.
: 
: But PCI interrupts can be programmed either level- or edge-triggered, so
: wouldn't programming to edge-triggered interrupts solve the "they won't shut
: up" issue?

PCI interrupts are level.  There's no way to program them otherwise.

Warner
Received on Wed Dec 07 2005 - 16:59:28 UTC

This archive was generated by hypermail 2.4.0 : Wed May 19 2021 - 11:38:48 UTC