NetBSD/sys/arch/sun3x/include/dvma.h

76 lines
3.0 KiB
C

/* $NetBSD: dvma.h,v 1.1.1.1 1997/01/14 20:57:05 gwr Exp $ */
/*-
* Copyright (c) 1996 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Gordon W. Ross.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*
* DVMA (Direct Virtual Memory Access - like DMA)
*
* (Most of the comments pertaining to the sun3x DVMA are now
* in dvma.c)
*
* Relevant parts of virtual memory map are:
*
* FE00.0000 monitor map (devices)
* FF00.0000 Begining of DVMA space
* FFFF.FFFF End of DVMA space
*/
/*
* To convert an address in DVMA space to a slave address,
* just use a logical AND with one of the following masks.
* To convert back, just logical OR with the base address.
*/
#define DVMA_SLAVE_BASE 0xFF000000
#define DVMA_SLAVE_MASK 0x00FFffff /* 16MB */
/*
* DVMA is the last 16MB, but the PROM owns the last 1M.
* See mon.h: MON_DVMA_BASE, MON_DVMA_SIZE.
*/
#define DVMA_SPACE_START 0xFF000000
#define DVMA_SPACE_LENGTH 0xF00000
void dvma_init __P((void));
/* Remap/unmap kernel memory in DVMA space. */
void * dvma_mapin __P((void * kva, int len, int canwait));
void dvma_mapout __P((void * dvma_addr, int len));
/* Convert a kernel DVMA pointer to a slave address. */
u_long dvma_kvtopa __P((void * kva, int bus));