96 lines
3.9 KiB
C
96 lines
3.9 KiB
C
/* $NetBSD: sgmapvar.h,v 1.9 1998/06/24 01:04:26 ross 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 vm_offset_t alpha_sgmap_prefetch_spill_page_va;
|
|
extern bus_addr_t alpha_sgmap_prefetch_spill_page_pa;
|
|
|
|
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 *,
|
|
bus_size_t));
|
|
|
|
int alpha_sgmap_alloc __P((bus_dmamap_t, bus_size_t,
|
|
struct alpha_sgmap *, int));
|
|
void alpha_sgmap_free __P((bus_dmamap_t, struct alpha_sgmap *));
|
|
|
|
#endif /* _ALPHA_COMMON_SGMAPVAR_H */
|