dce4476374
A new "arm32_dma_range" structure now describes a DMA window, with a system address base, bus address base, and length. In addition to providing info about which memory regions are legal for DMA, the new structure provides address translation support, as well. As before, if a tag does not list any ranges, then all addresses are considered valid, and no DMA address translation is performed. This allows us to remove a large chunk of code which was duplicated and tweaked slightly (to do the address translation) from the stock ARM bus_dma in the XScale IOP and ARM Integrator ports. Test compiled on all ARM platforms, test booted on Intel IQ80321 and Shark.
43 lines
1.8 KiB
C
43 lines
1.8 KiB
C
/* $NetBSD: int_bus_dma.h,v 1.2 2002/07/31 17:34:26 thorpej Exp $ */
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/*
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* Copyright (c) 2001 ARM Ltd
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* All rights reserved.
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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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* 3. The name of the company may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef _INT_BUS_DMA_H
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#define _INT_BUS_DMA_H
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#include <machine/bus.h>
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#define CM_ALIAS_TO_LOCAL(addr) (addr & 0x0fffffff)
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#define LOCAL_TO_CM_ALIAS(addr) (addr | 0x80000000)
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void integrator_pci_dma_init(bus_dma_tag_t);
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#endif /* _INT_BUS_DMA_H */
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