/*      $NetBSD: mipssim_dma.c,v 1.2 2022/12/28 11:40:35 he Exp $       */

/*-
* Copyright (c) 2021 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe.
*
* 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.
*/

/*
* Platform-specific DMA support for the mipssim.
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: mipssim_dma.c,v 1.2 2022/12/28 11:40:35 he Exp $");

#include <sys/param.h>
#include <sys/device.h>

#define _MIPS_BUS_DMA_PRIVATE
#include <sys/bus.h>

#include <dev/isa/isavar.h>

#include <evbmips/mipssim/mipssimreg.h>
#include <evbmips/mipssim/mipssimvar.h>

void
mipssim_dma_init(struct mipssim_config *mcp)
{
       bus_dma_tag_t t;

       t = &mcp->mc_dmat;
       t->_cookie = mcp;
       t->_wbase = MIPSSIM_DMA_BASE;
       t->_bounce_alloc_lo = MIPSSIM_DMA_PHYSBASE;
       t->_bounce_alloc_hi = MIPSSIM_DMA_PHYSBASE + MIPSSIM_DMA_SIZE;
       t->_bounce_thresh = t->_bounce_alloc_hi; /* as an approximation */
       t->_dmamap_ops = mips_bus_dmamap_ops;
       t->_dmamem_ops = mips_bus_dmamem_ops;
       t->_dmatag_ops = mips_bus_dmatag_ops;
}