/*
** ccio-dma.c:
** DMA management routines for first generation cache-coherent machines.
** Program U2/Uturn in "Virtual Mode" and use the I/O MMU.
**
** (c) Copyright 2000 Grant Grundler
** (c) Copyright 2000 Ryan Bradetich
** (c) Copyright 2000 Hewlett-Packard Company
**
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU General Public License as published by
** the Free Software Foundation; either version 2 of the License, or
** (at your option) any later version.
**
**
** "Real Mode" operation refers to U2/Uturn chip operation.
** U2/Uturn were designed to perform coherency checks w/o using
** the I/O MMU - basically what x86 does.
**
** Philipp Rumpf has a "Real Mode" driver for PCX-W machines at:
