78 lines
2.6 KiB
C
78 lines
2.6 KiB
C
/* $NetBSD: exynos5422_dma.c,v 1.1 2015/12/11 04:05:54 marty Exp $ */
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/*-
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* Copyright (c) 2012 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 Nick Hudson
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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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*
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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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#include "opt_exynos.h"
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: exynos5422_dma.c,v 1.1 2015/12/11 04:05:54 marty Exp $");
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#define _ARM32_BUS_DMA_PRIVATE
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#include <sys/param.h>
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#include <sys/bus.h>
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#include <arm/samsung/exynos_reg.h>
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#include <arm/samsung/exynos_var.h>
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struct arm32_bus_dma_tag exynos_bus_dma_tag = {
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_BUS_DMAMAP_FUNCS,
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_BUS_DMAMEM_FUNCS,
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_BUS_DMATAG_FUNCS,
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};
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struct arm32_dma_range exynos_coherent_dma_ranges[1] = {
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[0] = {
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.dr_sysbase = 0, /* filled in */
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.dr_busbase = 0, /* filled in */
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.dr_flags = _BUS_DMAMAP_COHERENT,
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},
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};
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struct arm32_bus_dma_tag exynos_coherent_bus_dma_tag = {
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._ranges = exynos_coherent_dma_ranges,
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._nranges = __arraycount(exynos_coherent_dma_ranges),
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_BUS_DMAMAP_FUNCS,
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_BUS_DMAMEM_FUNCS,
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_BUS_DMATAG_FUNCS,
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};
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void
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exynos_dma_bootstrap(psize_t memsize)
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{
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bus_addr_t dram_base = EXYNOS5_SDRAM_PBASE;
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KASSERT(dram_base);
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exynos_coherent_dma_ranges[0].dr_sysbase = dram_base;
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exynos_coherent_dma_ranges[0].dr_busbase = dram_base;
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exynos_coherent_dma_ranges[0].dr_len = memsize;
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}
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