1.\" $NetBSD: em4k.4,v 1.6 2017/02/17 22:24:45 christos Exp $ 2.\" 3.\" Copyright (c) 2013 The NetBSD Foundation, Inc. 4.\" All rights reserved. 5.\" 6.\" This code is derived from software contributed to The NetBSD Foundation 7.\" by Radoslaw Kujawa. 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 22.\" BE 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 EM4K 4 amiga 32.Os 33.Sh NAME 34.Nm em4k 35.Nd ELBOX Mediator 4000 PCI bridge driver 36.Sh SYNOPSIS 37.Cd "em4k0 at zbus0" 38.Cd "emmem0 at zbus0" 39.Cd "pci* at empb0" 40.Cd "options PCI_NETBSD_CONFIGURE" 41.Sh DESCRIPTION 42The 43.Nm 44driver provides support for the PCI bus present on Mediator 4000 bridge and associated 45PCI/Zorro daughterboards. 46.Sh HARDWARE 47The 48.Nm 49driver supports the following hardware: 50.Bl -tag -offset indent 51.It ELBOX Mediator PCI 4000D 52.It ELBOX Mediator PCI 4000Di 53.It ELBOX Mediator PCI 4000T 54.It ELBOX Mediator PCI 3000D 55.It ELBOX Mediator PCI 3000T 56.El 57MK-II editions are also supported. 58.Sh SEE ALSO 59.Xr amiga/empb 4 , 60.Xr amiga/mppb 4 , 61.Xr amiga/p5pb 4 , 62.Xr pci 4 63.Sh HISTORY 64The 65.Nm 66device first appeared in 67.Nx 7.0 . 68.Sh AUTHORS 69.An -nosplit 70The 71.Nm 72driver was written by 73.An Radoslaw Kujawa Aq Mt radoslaw.kujawa@gmail.com . 74It was developed using information obtained through reverse engineering 75by 76.An Frank Wille 77and 78.An Radoslaw Kujawa . 79The authors have no access to official 80documentation (which is only available under NDA). 81.Sh BUGS 82DMA to host memory is not supported. 83It is unclear if the hardware supports DMA to host memory at all. 84It is possible to implement DMA through bounce buffers in graphics card memory, 85but this needs further research. 86