1.\" $OpenBSD: ioapic.4,v 1.3 2007/05/31 19:19:53 jmc Exp $ 2.\" 3.\" Copyright (c) 2006 Mark Kettenis 4.\" 5.\" Permission to use, copy, modify, and distribute this software for any 6.\" purpose with or without fee is hereby granted, provided that the above 7.\" copyright notice and this permission notice appear in all copies. 8.\" 9.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16.\" 17.Dd $Mdocdate: May 31 2007 $ 18.Dt IOAPIC 4 amd64 19.Os 20.Sh NAME 21.Nm ioapic 22.Nd I/O Advanced Programmable Interrupt Controller 23.Sh SYNOPSIS 24.Cd "ioapic0 at mainbus0" 25.Sh DESCRIPTION 26.Nm 27is an I/O Advanced Programmable Interrupt Controller (APIC). 28It provides interrupt management for systems with multiple I/O 29subsystems and can distribute interrupts across multiple processors. 30.Sh SEE ALSO 31.Xr intro 4 32.Sh STANDARDS 33.Nm 34is based on 35Intel's 82093AA I/O Advanced Programmable Interrupt Controller (I/O APIC) 36specification. 37.Sh HISTORY 38The 39.Nm 40driver first appeared in 41.Ox 3.5 . 42.Sh AUTHORS 43The 44.Nm 45driver was written by 46.An Bill Sommerfield . 47