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Pull the thorpej-bus-dma branch into the mainline.

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thorpej 1997-06-07 05:29:33 +00:00
parent c108a0ce0b
commit 413f678ce0
1 changed files with 83 additions and 0 deletions
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sys/arch/alpha/common/sgmapvar.h Normal file
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/* $NetBSD: sgmapvar.h,v 1.2 1997/06/07 05:29:33 thorpej Exp $ */
/*-
* Copyright (c) 1997 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
* NASA Ames Research Center.
*
* 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.
*/
#include <sys/extent.h>
#include <machine/bus.h>
/*
* Bits n:13 of the DMA address are the index of the PTE into
* the SGMAP page table.
*/
#define SGMAP_ADDR_PTEIDX_SHIFT 13
/*
* An Alpha SGMAP's state information.
*/
struct alpha_sgmap {
struct extent *aps_ex; /* extent map to manage sgva space */
void *aps_pt; /* page table */
bus_addr_t aps_ptpa; /* page table physical address */
bus_addr_t aps_sgvabase; /* base of the sgva space */
bus_size_t aps_sgvasize; /* size of the sgva space */
bus_addr_t aps_wbase; /* base of the dma window */
};
/*
* Cookie used to store SGMAP state for a DMA mapping. We
* could compute some of this at unload time, but storing it
* is convenient.
*/
struct alpha_sgmap_cookie {
int apdc_pteidx; /* PTE index */
int apdc_ptecnt; /* PTE count */
u_long apdc_sgva; /* allocated sgva */
bus_size_t apdc_len; /* sgva size */
int apdc_flags;
};
/* apdc_flags */
#define APDC_HAS_SGMAP 0x01 /* sgva/len are valid */
void alpha_sgmap_init __P((bus_dma_tag_t, struct alpha_sgmap *,
const char *, bus_addr_t, bus_addr_t, bus_size_t, size_t, void *));
int alpha_sgmap_alloc __P((bus_dmamap_t, bus_size_t,
struct alpha_sgmap *, int));
void alpha_sgmap_free __P((struct alpha_sgmap *,
struct alpha_sgmap_cookie *));