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INTRO(4) Device Drivers Manual (sgi) INTRO(4)

introduction to special files and hardware support

The manual pages in section 4 describe the special files, related driver functions, and networking support available in the system. In this part of the manual, the SYNOPSIS section of each configurable device gives a sample specification for use in constructing a system description for the config(8) program. The DIAGNOSTICS section lists messages which may appear on the console and/or in the system error log /var/log/messages due to errors in device operation; see syslogd(8) for more information.
This section contains both devices which may be configured into the system and network related information. The networking support is introduced in netintro(4).

This section describes the hardware supported on the sgi platform. Software support for these devices comes in two forms. A hardware device may be supported with a character or block device driver, or it may be used within the networking subsystem and have a network interface driver. Block and character devices are accessed through files in the file system of a special type; see mknod(8). Network interfaces are indirectly accessed through the interprocess communication facilities provided by the system; see socket(2).
A hardware device is identified to the system at configuration time and the appropriate device or network interface driver is then compiled into the system. When the resultant system is booted, the autoconfiguration facilities in the system probe for the device and, if found, enable the software support for it. If a device does not respond at autoconfiguration time it is not accessible at any time afterwards. To enable a device which did not autoconfigure, the system must be rebooted.
The autoconfiguration system is described in autoconf(4). A list of the supported devices is given below.

The following systems are supported:
Hardware Family Kernel Model
IP20 IP22 Indigo (R4k)
IP22 IP22 Indigo2, Challenge M (R4k)
IP22 IP22 Indy, Challenge S
IP22 IP26 POWER Indigo2 (R8000)
IP27 IP27 Origin 2x00, Onyx 2
IP22 IP28 POWER Indigo2 (R10000)
IP27 IP27 Origin 200
IP30 IP30 Octane, Octane 2 (Speedracer)
IP27 IP27 Origin 200/2x00, Onyx 2 (250+ MHz)
IP32 IP32 O2, O2+ (Moosehead)
IP35 IP27 Fuel (Asterix)
IP35 IP27 Origin 3x00, Onyx 3x000, Onyx 3
IP35 IP27 Onyx 4
IP35 IP27 Origin 300, Onyx 300
IP35 IP27 Origin 350, Onyx 350, Tezro
IP35 IP27 Origin 350, Onyx 350, Tezro (1GHz)

The devices listed below are supported in this incarnation of the system. Not all supported devices are listed.
SGI Graphics Back End (GBE) frame buffer
IOC3 generic workstation I/O device
IOC4 generic workstation I/O device
Multimedia, Audio and Communications Engine I/O ASIC
SGI main processor bus device
Moosehead A/V Board audio device
MAC-110 10/100 Ethernet device
power button
A further list of available devices is contained within the pages describing the system buses and controllers. For example, a PCI device would be listed in the pci(4) man page. The following buses and controllers list these devices:
Graphics I/O GIO bus
introduction to PCI bus support
introduction to Universal Serial Bus support
Octane and Origin family XIO bus

autoconf(4), config(8)

This sgi intro appeared in OpenBSD 3.6.
September 20, 2015 OpenBSD-6.1