1.\" $OpenBSD: intro.4,v 1.40 2023/05/03 22:03:17 jmc Exp $ 2.\" 3.\" Copyright (c) 1983, 1986, 1991 Regents of the University of California. 4.\" All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 3. Neither the name of the University nor the names of its contributors 15.\" may be used to endorse or promote products derived from this software 16.\" without specific prior written permission. 17.\" 18.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 19.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 22.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28.\" SUCH DAMAGE. 29.\" 30.Dd $Mdocdate: May 3 2023 $ 31.Dt INTRO 4 amd64 32.Os 33.Sh NAME 34.Nm intro 35.Nd introduction to special files and hardware support 36.Sh DESCRIPTION 37The manual pages in section 4 describe the special files, 38related driver functions, and networking support 39available in the system. 40In this part of the manual, the SYNOPSIS section of 41each configurable device gives a sample specification 42for use in constructing a system description for the 43.Xr config 8 44program. 45The DIAGNOSTICS section lists messages which may appear on the console 46and/or in the system error log 47.Pa /var/log/messages 48due to errors in device operation; 49see 50.Xr syslogd 8 51for more information. 52.Pp 53This section contains both devices 54which may be configured into the system 55and network related information. 56The networking support is introduced in 57.Xr netintro 4 . 58.Sh DEVICE SUPPORT 59This section describes the hardware supported on the amd64 platform. 60Software support for these devices comes in two forms. 61A hardware device may be supported with a character or block 62.Em device driver , 63or it may be used within the networking subsystem and have a 64.Em network interface driver . 65Block and character devices are accessed through files in the file 66system of a special type; see 67.Xr mknod 8 . 68Network interfaces are indirectly accessed through the interprocess 69communication facilities provided by the system; see 70.Xr socket 2 . 71.Pp 72A hardware device is identified to the system at configuration time 73and the appropriate device or network interface driver is then compiled 74into the system. 75When the resultant system is booted, the autoconfiguration facilities 76in the system probe for the device and, if found, enable the software 77support for it. 78If a device does not respond at autoconfiguration 79time, it is not accessible at any time afterwards. 80To enable a device which did not autoconfigure, 81the system will have to be rebooted. 82.Pp 83The autoconfiguration system is described in 84.Xr autoconf 4 . 85.Sh LIST OF DEVICES 86A complete list of available devices is contained within the pages 87describing the system buses and controllers. 88For example, a PCI device would be listed in the 89.Xr pci 4 90man page. 91The following buses and controllers list these devices: 92.Pp 93.Bl -tag -width "cardbus(4)XX" -offset 3n -compact 94.It Xr acpi 4 95Advanced Configuration and Power Interface 96.It Xr cardbus 4 97introduction to CardBus support 98.It Xr iic 4 99Inter IC (I2C) bus 100.It Xr isa 4 101introduction to ISA bus support 102.It Xr onewire 4 1031-Wire bus 104.It Xr pci 4 105introduction to PCI bus support 106.It Xr pcmcia 4 107introduction to PCMCIA (PC Card) support 108.It Xr usb 4 109introduction to Universal Serial Bus support 110.It Xr virtio 4 111VirtIO support driver 112.El 113.Sh SEE ALSO 114.Xr autoconf 4 , 115.Xr cpu 4 , 116.Xr config 8 117.Sh HISTORY 118The 119amd64 120.Nm intro 121first appeared in 122.Ox 3.5 . 123