101 lines
3.3 KiB
Groff
101 lines
3.3 KiB
Groff
.\" $NetBSD: hpc.4,v 1.12 2008/04/30 13:10:56 martin Exp $
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.\"
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.\" Copyright (c) 2002 The NetBSD Foundation, Inc.
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.\" All rights reserved.
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.\"
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.\" This document is derived from work contributed to The NetBSD Foundation
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.\" by Antti Kantee.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS BE
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.\" LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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.\" POSSIBILITY OF SUCH DAMAGE.
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.\"
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.Dd December 22, 2006
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.Dt HPC 4 sgimips
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.Os
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.Sh NAME
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.Nm hpc
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.Nd SGI High performance Peripheral Controller
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.Sh SYNOPSIS
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.Cd "hpc0 at gio0 addr 0x1fb80000"
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.Cd "hpc1 at gio0 addr 0x1fb00000"
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.Cd "hpc2 at gio0 addr 0x1fb98000"
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.Cd "hpc3 at gio0 addr 0x1fb90000"
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.Sh DESCRIPTION
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.Nm
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interfaces the peripherals connected to it to the
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.Xr gio 4
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bus.
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.Nm
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is found on the Personal Iris 4D/3x, Indigo, Indy, Challenge S, Challenge M,
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and Indigo2 machines.
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.Pp
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There are three different numerical revisions of the
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.Nm
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controller.
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Revisions 1 and 1.5 exist on Personal Iris 4D/3x and Indigo machines,
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as well as GIO32bis expansion cards such as the E++ SEEQ-based
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Ethernet adapter.
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Revision 1.5 supports bi-endian operation.
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Revision 3 exists on Indy, Challenge S, Indigo2, and Challenge M systems.
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It is possible to have an on-board HPC3 as well as HPC1.5-based
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GIO32bis adapters in the Indy and Challenge S systems.
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Additionally, the Challenge S may have a secondary HPC3 if the IOPLUS
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(a.k.a. ''mezzanine'') board is installed.
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.Sh HARDWARE
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.Bl -tag -width dsclock -offset indent
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.It dsclock
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DS1286-based RTC
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.It dpclock
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DP8573A-based RTC
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.It haltwo
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HAL2 audio controller
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.It sq
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Seeq 8003 and 80C03
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.Tn Ethernet
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controllers
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.It wdsc
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WD33c93
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.Tn SCSI
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controller
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.It zsc
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Zilog Z8530 UART
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.El
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.Sh SEE ALSO
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.Xr gio 4 ,
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.Xr imc 4 ,
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.Xr pic 4
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.Sh HISTORY
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The
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.Nm
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driver first appeared in
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.Nx 1.6
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with support for Revision 3.
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Revision 1 and 1.5 support was added in
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.Nx 2.0 .
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.Sh BUGS
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.Nm
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Revisions 1 and 1.5 support DMA buffer pointers of only 28 bits
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and may therefore only address 256 megabytes of memory.
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The R4k Indigo and Indy are the only systems that support sufficient
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memory to illustrate this drawback.
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A software workaround is not currently implemented.
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Revision 3, with 32 bit pointers, does not have this limitation.
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