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/* $OpenBSD: sgmapvar.h,v 1.2 2002/03/14 01:26:26 millert Exp $ */
/* $NetBSD: sgmapvar.h,v 1.10 1998/08/14 16:50:02 thorpej Exp $ */
/*-
* Copyright (c) 1997, 1998 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.
*/
#ifndef _ALPHA_COMMON_SGMAPVAR_H
#define _ALPHA_COMMON_SGMAPVAR_H
#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. Nothing in the sgmap requires
* locking[*], with the exception of the extent map. Locking of the
* extent map is handled within the extent manager itself.
*
* [*] While the page table is a `global' resource, access to it is
* controlled by the extent map; once a region has been allocated from
* the map, that region is effectively `locked'.
*/
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 */
};
/*
* Log entry, used for debugging SGMAPs.
*/
struct sgmap_log_entry {
int sl_op; /* op; 1 = load, 0 = unload */
struct alpha_sgmap *sl_sgmap; /* sgmap for entry */
void *sl_origbuf; /* original buffer */
u_long sl_pgoffset; /* page offset of buffer start */
u_long sl_origlen; /* length of transfer */
u_long sl_sgva; /* sgva of transfer */
u_long sl_dmaaddr; /* dma address */
int sl_ptecnt; /* pte count */
};
extern vaddr_t alpha_sgmap_prefetch_spill_page_va;
extern bus_addr_t alpha_sgmap_prefetch_spill_page_pa;
void alpha_sgmap_init(bus_dma_tag_t, struct alpha_sgmap *,
const char *, bus_addr_t, bus_addr_t, bus_size_t, size_t, void *,
bus_size_t);
int alpha_sgmap_alloc(bus_dmamap_t, bus_size_t,
struct alpha_sgmap *, int);
void alpha_sgmap_free(bus_dmamap_t, struct alpha_sgmap *);
#endif /* _ALPHA_COMMON_SGMAPVAR_H */
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