1 /* $NetBSD: sgmapvar.h,v 1.13 2001/07/19 04:27:37 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 1997, 1998, 2001 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, 9 * NASA Ames Research Center. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the NetBSD 22 * Foundation, Inc. and its contributors. 23 * 4. Neither the name of The NetBSD Foundation nor the names of its 24 * contributors may be used to endorse or promote products derived 25 * from this software without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 30 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 37 * POSSIBILITY OF SUCH DAMAGE. 38 */ 39 40 #ifndef _ALPHA_COMMON_SGMAPVAR_H 41 #define _ALPHA_COMMON_SGMAPVAR_H 42 43 #include <sys/extent.h> 44 #include <machine/bus.h> 45 46 /* 47 * Bits n:13 of the DMA address are the index of the PTE into 48 * the SGMAP page table. 49 */ 50 #define SGMAP_ADDR_PTEIDX_SHIFT 13 51 52 /* 53 * An Alpha SGMAP's state information. Nothing in the sgmap requires 54 * locking[*], with the exception of the extent map. Locking of the 55 * extent map is handled within the extent manager itself. 56 * 57 * [*] While the page table is a `global' resource, access to it is 58 * controlled by the extent map; once a region has been allocated from 59 * the map, that region is effectively `locked'. 60 */ 61 struct alpha_sgmap { 62 struct extent *aps_ex; /* extent map to manage sgva space */ 63 void *aps_pt; /* page table */ 64 bus_addr_t aps_ptpa; /* page table physical address */ 65 bus_addr_t aps_sgvabase; /* base of the sgva space */ 66 bus_size_t aps_sgvasize; /* size of the sgva space */ 67 bus_addr_t aps_wbase; /* base of the dma window */ 68 }; 69 70 extern vaddr_t alpha_sgmap_prefetch_spill_page_va; 71 extern bus_addr_t alpha_sgmap_prefetch_spill_page_pa; 72 73 void alpha_sgmap_init(bus_dma_tag_t, struct alpha_sgmap *, 74 const char *, bus_addr_t, bus_addr_t, bus_size_t, size_t, void *, 75 bus_size_t); 76 77 int alpha_sgmap_dmamap_create(bus_dma_tag_t, bus_size_t, int, 78 bus_size_t, bus_size_t, int, bus_dmamap_t *); 79 void alpha_sgmap_dmamap_destroy(bus_dma_tag_t, bus_dmamap_t); 80 81 #endif /* _ALPHA_COMMON_SGMAPVAR_H */ 82