c292276dcf
the only part that is visible to VME masters, and is adequate space. This allows the "si" driver (on VME) to use DMA transfers.
79 lines
3.3 KiB
C
79 lines
3.3 KiB
C
/* $NetBSD: dvma3x.h,v 1.4 1998/01/22 22:20:35 gwr Exp $ */
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/*-
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* Copyright (c) 1996 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Gordon W. Ross.
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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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
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* BE 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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/*
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* DVMA (Direct Virtual Memory Access - like DMA)
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*
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* (Most of the comments pertaining to the sun3x DVMA are now
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* in dvma.c)
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*
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* Note that while the DVMA harware makes the last 1MB visible
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* for secondary masters, the PROM "owns" the last page of it.
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* Also note that OBIO devices can actually see the last 16MB
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* of kernel virtual space. That can be mostly ignored, except
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* when calculating the alias address for slave access.
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*/
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#define DVMA_MAP_BASE 0xFFF00000
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#define DVMA_MAP_SIZE 0x00100000
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#define DVMA_MAP_AVAIL (DVMA_MAP_SIZE-NBPG)
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/*
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* To convert an address in DVMA space to a slave address,
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* just use a logical AND with one of the following masks.
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* To convert back, just logical OR with the base address.
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*/
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#define DVMA_OBIO_SLAVE_BASE 0xFF000000
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#define DVMA_OBIO_SLAVE_MASK 0x00FFffff /* 16MB */
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#define DVMA_VME_SLAVE_BASE 0xFFF00000
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#define DVMA_VME_SLAVE_MASK 0x000Fffff /* 1MB */
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void dvma_init __P((void));
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/* Allocate/free actual pages of DVMA space. */
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void * dvma_malloc __P((size_t bytes));
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void dvma_free(void *addr, size_t bytes);
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/* Remap/unmap kernel memory in DVMA space. */
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void * dvma_mapin __P((void *kva, int len, int canwait));
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void dvma_mapout __P((void *dvma_addr, int len));
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/* Convert a kernel DVMA pointer to a slave address. */
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u_long dvma_kvtopa __P((void *kva, int bus));
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