63 lines
2.4 KiB
C
63 lines
2.4 KiB
C
/* $NetBSD: dvma.h,v 1.13 2008/04/28 20:23:38 martin 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.
|
|
*
|
|
* 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)
|
|
*
|
|
* For the unfamiliar, this is just DMA where the device doing DMA
|
|
* operates in a virtual address space. The virtual to physical
|
|
* translations are controlled by some sort of I/O MMU, which may
|
|
* be the same used by the CPU (sun3) or not (sun3x). Usually, the
|
|
* virtual space accessed by DVMA devices is a small sub-range of
|
|
* the CPU virtual space, and that range is known as DVMA space.
|
|
*/
|
|
|
|
#ifdef _SUN3_
|
|
#include <machine/dvma3.h>
|
|
#endif /* SUN3 */
|
|
#ifdef _SUN3X_
|
|
#include <machine/dvma3x.h>
|
|
#endif /* SUN3X */
|
|
|
|
void dvma_init(void);
|
|
|
|
/* Allocate/free actual pages of DVMA space. */
|
|
void *dvma_malloc(size_t);
|
|
void dvma_free(void *, size_t);
|
|
|
|
/* Remap/unmap kernel memory in DVMA space. */
|
|
void *dvma_mapin(void *, int, int);
|
|
void dvma_mapout(void *, int);
|
|
|
|
/* Convert a kernel DVMA pointer to a slave address. */
|
|
u_long dvma_kvtopa(void *, int);
|
|
|