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/* $OpenBSD: irongate_dma.c,v 1.2 2001/04/17 14:53:33 art Exp $ */
/* $NetBSD: irongate_dma.c,v 1.3 2000/06/29 08:58:47 mrg Exp $ */
/*-
* Copyright (c) 2000 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.
* 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.
*/
/*
* DMA support for the AMD 751 (``Irongate'') core logic chipset.
*
* The AMD 751 is really unlike all of the other Alpha PCI core logic
* chipsets. Instead, it looks like a normal PC chipset (not surprising,
* since it is used for Athlon processors).
*
* Because of this, it lacks all of the SGMAP hardware normally present
* on an Alpha system, and there are no DMA windows. Instead, a memory
* bus address is a PCI DMA address, and ISA DMA above 16M has to be
* bounced (this is not unlike the Jensen, actually).
*/
/*
* XXX - We should define this before including bus.h, but since other stuff
* pulls in bus.h we must do this here.
*/
#define _ALPHA_BUS_DMA_PRIVATE
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/malloc.h>
#include <vm/vm.h>
#include <uvm/uvm_extern.h>
#include <machine/bus.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include <alpha/pci/irongatereg.h>
#include <alpha/pci/irongatevar.h>
#include <dev/isa/isareg.h>
#include <dev/isa/isavar.h>
bus_dma_tag_t irongate_dma_get_tag(bus_dma_tag_t, alpha_bus_t);
void
irongate_dma_init(struct irongate_config *icp)
{
bus_dma_tag_t t;
/*
* Initialize the DMA tag used for PCI DMA.
*/
t = &icp->ic_dmat_pci;
t->_cookie = icp;
t->_wbase = 0;
t->_wsize = 0x100000000UL;
t->_next_window = NULL;
t->_boundary = 0;
t->_sgmap = NULL;
t->_get_tag = irongate_dma_get_tag;
t->_dmamap_create = _bus_dmamap_create;
t->_dmamap_destroy = _bus_dmamap_destroy;
t->_dmamap_load = _bus_dmamap_load_direct;
t->_dmamap_load_mbuf = _bus_dmamap_load_mbuf_direct;
t->_dmamap_load_uio = _bus_dmamap_load_uio_direct;
t->_dmamap_load_raw = _bus_dmamap_load_raw_direct;
t->_dmamap_unload = _bus_dmamap_unload;
t->_dmamap_sync = _bus_dmamap_sync;
t->_dmamem_alloc = _bus_dmamem_alloc;
t->_dmamem_free = _bus_dmamem_free;
t->_dmamem_map = _bus_dmamem_map;
t->_dmamem_unmap = _bus_dmamem_unmap;
t->_dmamem_mmap = _bus_dmamem_mmap;
#if 0
/*
* Initialize the DMA tag used for ISA DMA.
*/
t = &icp->ic_dmat_isa;
t->_cookie = icp;
t->_wbase = 0;
t->_wsize = 0x1000000;
t->_next_window = NULL;
t->_boundary = 0;
t->_sgmap = NULL;
t->_get_tag = irongate_dma_get_tag;
t->_dmamap_create = isadma_bounce_dmamap_create;
t->_dmamap_destroy = isadma_bounce_dmamap_destroy;
t->_dmamap_load = isadma_bounce_dmamap_load;
t->_dmamap_load_mbuf = isadma_bounce_dmamap_load_mbuf;
t->_dmamap_load_uio = isadma_bounce_dmamap_load_uio;
t->_dmamap_load_raw = isadma_bounce_dmamap_load_raw;
t->_dmamap_unload = isadma_bounce_dmamap_unload;
t->_dmamap_sync = isadma_bounce_dmamap_sync;
t->_dmamem_alloc = isadma_bounce_dmamem_alloc;
t->_dmamem_free = _bus_dmamem_free;
t->_dmamem_map = _bus_dmamem_map;
t->_dmamem_unmap = _bus_dmamem_unmap;
t->_dmamem_mmap = _bus_dmamem_mmap;
#endif
/* XXX XXX BEGIN XXX XXX */
{ /* XXX */
extern paddr_t alpha_XXX_dmamap_or; /* XXX */
alpha_XXX_dmamap_or = 0; /* XXX */
} /* XXX */
/* XXX XXX END XXX XXX */
}
/*
* Return the bus dma tag to be used for the specified bus type.
* INTERNAL USE ONLY!
*/
bus_dma_tag_t
irongate_dma_get_tag(bus_dma_tag_t t, alpha_bus_t bustype)
{
struct irongate_config *icp = t->_cookie;
switch (bustype) {
case ALPHA_BUS_PCI:
case ALPHA_BUS_EISA:
/*
* Busses capable of 32-bit DMA get the PCI DMA tag.
*/
return (&icp->ic_dmat_pci);
case ALPHA_BUS_ISA:
/*
* Lame 24-bit busses have to bounce.
*/
return (&icp->ic_dmat_isa);
default:
panic("irongate_dma_get_tag: shouldn't be here, really...");
}
}
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