1.\" $NetBSD: hpc.4,v 1.13 2017/02/17 22:24:47 christos Exp $ 2.\" 3.\" Copyright (c) 2002 The NetBSD Foundation, Inc. 4.\" All rights reserved. 5.\" 6.\" This document is derived from work contributed to The NetBSD Foundation 7.\" by Antti Kantee. 8.\" 9.\" Redistribution and use in source and binary forms, with or without 10.\" modification, are permitted provided that the following conditions 11.\" are met: 12.\" 1. Redistributions of source code must retain the above copyright 13.\" notice, this list of conditions and the following disclaimer. 14.\" 2. Redistributions in binary form must reproduce the above copyright 15.\" notice, this list of conditions and the following disclaimer in the 16.\" documentation and/or other materials provided with the distribution. 17.\" 18.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 19.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 20.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 21.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS BE 22.\" LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28.\" POSSIBILITY OF SUCH DAMAGE. 29.\" 30.Dd February 17, 2017 31.Dt HPC 4 sgimips 32.Os 33.Sh NAME 34.Nm hpc 35.Nd SGI High performance Peripheral Controller 36.Sh SYNOPSIS 37.Cd "hpc0 at gio0 addr 0x1fb80000" 38.Cd "hpc1 at gio0 addr 0x1fb00000" 39.Cd "hpc2 at gio0 addr 0x1fb98000" 40.Cd "hpc3 at gio0 addr 0x1fb90000" 41.Sh DESCRIPTION 42.Nm 43interfaces the peripherals connected to it to the 44.Xr sgimips/gio 4 45bus. 46.Nm 47is found on the Personal Iris 4D/3x, Indigo, Indy, Challenge S, Challenge M, 48and Indigo2 machines. 49.Pp 50There are three different numerical revisions of the 51.Nm 52controller. 53Revisions 1 and 1.5 exist on Personal Iris 4D/3x and Indigo machines, 54as well as GIO32bis expansion cards such as the E++ SEEQ-based 55Ethernet adapter. 56Revision 1.5 supports bi-endian operation. 57Revision 3 exists on Indy, Challenge S, Indigo2, and Challenge M systems. 58It is possible to have an on-board HPC3 as well as HPC1.5-based 59GIO32bis adapters in the Indy and Challenge S systems. 60Additionally, the Challenge S may have a secondary HPC3 if the IOPLUS 61(a.k.a. ''mezzanine'') board is installed. 62.Sh HARDWARE 63.Bl -tag -width dsclock -offset indent 64.It dsclock 65DS1286-based RTC 66.It dpclock 67DP8573A-based RTC 68.It haltwo 69HAL2 audio controller 70.It sq 71Seeq 8003 and 80C03 72.Tn Ethernet 73controllers 74.It wdsc 75WD33c93 76.Tn SCSI 77controller 78.It zsc 79Zilog Z8530 UART 80.El 81.Sh SEE ALSO 82.Xr sgimips/gio 4 , 83.Xr sgimips/imc 4 , 84.Xr sgimips/pic 4 85.Sh HISTORY 86The 87.Nm 88driver first appeared in 89.Nx 1.6 90with support for Revision 3. 91Revision 1 and 1.5 support was added in 92.Nx 2.0 . 93.Sh BUGS 94.Nm 95Revisions 1 and 1.5 support DMA buffer pointers of only 28 bits 96and may therefore only address 256 megabytes of memory. 97The R4k Indigo and Indy are the only systems that support sufficient 98memory to illustrate this drawback. 99A software workaround is not currently implemented. 100Revision 3, with 32 bit pointers, does not have this limitation. 101