/* $NetBSD: mipssim_dma.c,v 1.1.20.1 2022/12/28 14:38:07 martin 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 __KERNEL_RCSID(0, "$NetBSD: mipssim_dma.c,v 1.1.20.1 2022/12/28 14:38:07 martin Exp $"); #include #include #define _MIPS_BUS_DMA_PRIVATE #include #include #include #include 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; }