79 lines
3.4 KiB
C
79 lines
3.4 KiB
C
/* $NetBSD: dvma.h,v 1.3 2001/06/14 13:17:04 fredette 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 and Matthew Fredette.
|
|
*
|
|
* 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)
|
|
*
|
|
* 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 the same MMU used bu the CPU.
|
|
* 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.
|
|
*/
|
|
|
|
#include <machine/idprom.h>
|
|
|
|
/*
|
|
* Note that while the DVMA harware makes the last 1MB visible
|
|
* for secondary masters, the PROM "owns" the last page of it.
|
|
* XXX fredette - is this because of the obio ie SCP?
|
|
* Also note that OBIO devices can actually see all of
|
|
* of kernel virtual space.
|
|
*/
|
|
#define DVMA_MAP_BASE 0x00F00000
|
|
#define DVMA_MAP_SIZE_120 0x00040000
|
|
#define DVMA_MAP_SIZE_50 0x000F8000
|
|
#define DVMA_MAP_SIZE (cpu_machine_id == SUN2_MACH_120 ? DVMA_MAP_SIZE_120 : DVMA_MAP_SIZE_50)
|
|
#define DVMA_MAP_AVAIL (DVMA_MAP_SIZE-NBPG)
|
|
|
|
/*
|
|
* 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_OBIO_SLAVE_BASE 0x00000000
|
|
#define DVMA_OBIO_SLAVE_MASK 0x00FFffff /* 16MB */
|
|
|
|
#define DVMA_MBMEM_SLAVE_BASE 0x00F00000
|
|
#define DVMA_MBMEM_SLAVE_MASK 0x000Fffff /* 1MB */
|
|
|
|
#define DVMA_VME_SLAVE_BASE 0x00F00000
|
|
#define DVMA_VME_SLAVE_MASK 0x000Fffff /* 1MB */
|
|
|