1 /* $OpenBSD: sgmapvar.h,v 1.7 2014/06/14 23:11:20 jmatthew Exp $ */ 2 /* $NetBSD: sgmapvar.h,v 1.10 1998/08/14 16:50:02 thorpej Exp $ */ 3 4 /*- 5 * Copyright (c) 1997, 1998 The NetBSD Foundation, Inc. 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to The NetBSD Foundation 9 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, 10 * NASA Ames Research Center. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 23 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 24 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 25 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 31 * POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 #ifndef _ALPHA_COMMON_SGMAPVAR_H 35 #define _ALPHA_COMMON_SGMAPVAR_H 36 37 #include <sys/extent.h> 38 #include <sys/mutex.h> 39 #include <machine/bus.h> 40 41 /* 42 * Bits n:13 of the DMA address are the index of the PTE into 43 * the SGMAP page table. 44 */ 45 #define SGMAP_ADDR_PTEIDX_SHIFT 13 46 47 /* 48 * An Alpha SGMAP's state information. Nothing in the sgmap requires 49 * locking[*], with the exception of the extent map. Locking of the 50 * extent map is handled within the extent manager itself. 51 * 52 * [*] While the page table is a `global' resource, access to it is 53 * controlled by the extent map; once a region has been allocated from 54 * the map, that region is effectively `locked'. 55 */ 56 struct alpha_sgmap { 57 struct extent *aps_ex; /* extent map to manage sgva space */ 58 struct mutex aps_mtx; 59 void *aps_pt; /* page table */ 60 bus_addr_t aps_ptpa; /* page table physical address */ 61 bus_addr_t aps_sgvabase; /* base of the sgva space */ 62 bus_size_t aps_sgvasize; /* size of the sgva space */ 63 bus_addr_t aps_wbase; /* base of the dma window */ 64 }; 65 66 extern vaddr_t alpha_sgmap_prefetch_spill_page_va; 67 extern bus_addr_t alpha_sgmap_prefetch_spill_page_pa; 68 69 void alpha_sgmap_init(bus_dma_tag_t, struct alpha_sgmap *, 70 const char *, bus_addr_t, bus_addr_t, bus_size_t, size_t, void *, 71 bus_size_t); 72 73 int alpha_sgmap_dmamap_setup(bus_dmamap_t, int, int); 74 void alpha_sgmap_dmamap_teardown(bus_dmamap_t); 75 int alpha_sgmap_dmamap_create(bus_dma_tag_t, bus_size_t, int, bus_size_t, 76 bus_size_t, int, bus_dmamap_t *); 77 void alpha_sgmap_dmamap_destroy(bus_dma_tag_t, bus_dmamap_t); 78 79 #endif /* _ALPHA_COMMON_SGMAPVAR_H */ 80