bus_defs.h revision 1.1.18.2
1 1.1.18.2 jdolecek /* $NetBSD: bus_defs.h,v 1.1.18.2 2017/12/03 11:36:34 jdolecek Exp $ */ 2 1.1.18.2 jdolecek /* $OpenBSD: bus.h,v 1.1 1997/10/13 10:53:42 pefo Exp $ */ 3 1.1.18.2 jdolecek 4 1.1.18.2 jdolecek /*- 5 1.1.18.2 jdolecek * Copyright (c) 1996, 1997, 1998 The NetBSD Foundation, Inc. 6 1.1.18.2 jdolecek * All rights reserved. 7 1.1.18.2 jdolecek * 8 1.1.18.2 jdolecek * This code is derived from software contributed to The NetBSD Foundation 9 1.1.18.2 jdolecek * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, 10 1.1.18.2 jdolecek * NASA Ames Research Center. 11 1.1.18.2 jdolecek * 12 1.1.18.2 jdolecek * Redistribution and use in source and binary forms, with or without 13 1.1.18.2 jdolecek * modification, are permitted provided that the following conditions 14 1.1.18.2 jdolecek * are met: 15 1.1.18.2 jdolecek * 1. Redistributions of source code must retain the above copyright 16 1.1.18.2 jdolecek * notice, this list of conditions and the following disclaimer. 17 1.1.18.2 jdolecek * 2. Redistributions in binary form must reproduce the above copyright 18 1.1.18.2 jdolecek * notice, this list of conditions and the following disclaimer in the 19 1.1.18.2 jdolecek * documentation and/or other materials provided with the distribution. 20 1.1.18.2 jdolecek * 21 1.1.18.2 jdolecek * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 22 1.1.18.2 jdolecek * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 23 1.1.18.2 jdolecek * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 24 1.1.18.2 jdolecek * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 25 1.1.18.2 jdolecek * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 26 1.1.18.2 jdolecek * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 27 1.1.18.2 jdolecek * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 28 1.1.18.2 jdolecek * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 29 1.1.18.2 jdolecek * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 30 1.1.18.2 jdolecek * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 31 1.1.18.2 jdolecek * POSSIBILITY OF SUCH DAMAGE. 32 1.1.18.2 jdolecek */ 33 1.1.18.2 jdolecek 34 1.1.18.2 jdolecek /* 35 1.1.18.2 jdolecek * Copyright (c) 1996 Charles M. Hannum. All rights reserved. 36 1.1.18.2 jdolecek * Copyright (c) 1996 Jason R. Thorpe. All rights reserved. 37 1.1.18.2 jdolecek * Copyright (c) 1996 Christopher G. Demetriou. All rights reserved. 38 1.1.18.2 jdolecek * 39 1.1.18.2 jdolecek * Redistribution and use in source and binary forms, with or without 40 1.1.18.2 jdolecek * modification, are permitted provided that the following conditions 41 1.1.18.2 jdolecek * are met: 42 1.1.18.2 jdolecek * 1. Redistributions of source code must retain the above copyright 43 1.1.18.2 jdolecek * notice, this list of conditions and the following disclaimer. 44 1.1.18.2 jdolecek * 2. Redistributions in binary form must reproduce the above copyright 45 1.1.18.2 jdolecek * notice, this list of conditions and the following disclaimer in the 46 1.1.18.2 jdolecek * documentation and/or other materials provided with the distribution. 47 1.1.18.2 jdolecek * 3. All advertising materials mentioning features or use of this software 48 1.1.18.2 jdolecek * must display the following acknowledgement: 49 1.1.18.2 jdolecek * This product includes software developed by Christopher G. Demetriou 50 1.1.18.2 jdolecek * for the NetBSD Project. 51 1.1.18.2 jdolecek * 4. The name of the author may not be used to endorse or promote products 52 1.1.18.2 jdolecek * derived from this software without specific prior written permission 53 1.1.18.2 jdolecek * 54 1.1.18.2 jdolecek * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 55 1.1.18.2 jdolecek * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 56 1.1.18.2 jdolecek * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 57 1.1.18.2 jdolecek * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 58 1.1.18.2 jdolecek * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 59 1.1.18.2 jdolecek * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 60 1.1.18.2 jdolecek * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 61 1.1.18.2 jdolecek * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 62 1.1.18.2 jdolecek * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 63 1.1.18.2 jdolecek * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 64 1.1.18.2 jdolecek */ 65 1.1.18.2 jdolecek 66 1.1.18.2 jdolecek /* 67 1.1.18.2 jdolecek * Copyright (c) 1997 Per Fogelstrom. All rights reserved. 68 1.1.18.2 jdolecek * Copyright (c) 1996 Niklas Hallqvist. All rights reserved. 69 1.1.18.2 jdolecek * 70 1.1.18.2 jdolecek * Redistribution and use in source and binary forms, with or without 71 1.1.18.2 jdolecek * modification, are permitted provided that the following conditions 72 1.1.18.2 jdolecek * are met: 73 1.1.18.2 jdolecek * 1. Redistributions of source code must retain the above copyright 74 1.1.18.2 jdolecek * notice, this list of conditions and the following disclaimer. 75 1.1.18.2 jdolecek * 2. Redistributions in binary form must reproduce the above copyright 76 1.1.18.2 jdolecek * notice, this list of conditions and the following disclaimer in the 77 1.1.18.2 jdolecek * documentation and/or other materials provided with the distribution. 78 1.1.18.2 jdolecek * 3. All advertising materials mentioning features or use of this software 79 1.1.18.2 jdolecek * must display the following acknowledgement: 80 1.1.18.2 jdolecek * This product includes software developed by Christopher G. Demetriou 81 1.1.18.2 jdolecek * for the NetBSD Project. 82 1.1.18.2 jdolecek * 4. The name of the author may not be used to endorse or promote products 83 1.1.18.2 jdolecek * derived from this software without specific prior written permission 84 1.1.18.2 jdolecek * 85 1.1.18.2 jdolecek * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 86 1.1.18.2 jdolecek * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 87 1.1.18.2 jdolecek * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 88 1.1.18.2 jdolecek * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 89 1.1.18.2 jdolecek * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 90 1.1.18.2 jdolecek * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 91 1.1.18.2 jdolecek * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 92 1.1.18.2 jdolecek * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 93 1.1.18.2 jdolecek * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 94 1.1.18.2 jdolecek * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 95 1.1.18.2 jdolecek */ 96 1.1.18.2 jdolecek 97 1.1.18.2 jdolecek #ifndef _OR1K_BUS_DEFS_H_ 98 1.1.18.2 jdolecek #define _OR1K_BUS_DEFS_H_ 99 1.1.18.2 jdolecek 100 1.1.18.2 jdolecek /* 101 1.1.18.2 jdolecek * Bus access types. 102 1.1.18.2 jdolecek */ 103 1.1.18.2 jdolecek typedef uintptr_t bus_addr_t; 104 1.1.18.2 jdolecek typedef uintptr_t bus_size_t; 105 1.1.18.2 jdolecek 106 1.1.18.2 jdolecek typedef uintptr_t bus_space_handle_t; 107 1.1.18.2 jdolecek typedef const struct or1k_bus_space *bus_space_tag_t; 108 1.1.18.2 jdolecek 109 1.1.18.2 jdolecek struct extent; 110 1.1.18.2 jdolecek 111 1.1.18.2 jdolecek struct or1k_bus_space_scalar { 112 1.1.18.2 jdolecek uint8_t (*pbss_read_1)(bus_space_tag_t, bus_space_handle_t, 113 1.1.18.2 jdolecek bus_size_t); 114 1.1.18.2 jdolecek uint16_t (*pbss_read_2)(bus_space_tag_t, bus_space_handle_t, 115 1.1.18.2 jdolecek bus_size_t); 116 1.1.18.2 jdolecek uint32_t (*pbss_read_4)(bus_space_tag_t, bus_space_handle_t, 117 1.1.18.2 jdolecek bus_size_t); 118 1.1.18.2 jdolecek uint64_t (*pbss_read_8)(bus_space_tag_t, bus_space_handle_t, 119 1.1.18.2 jdolecek bus_size_t); 120 1.1.18.2 jdolecek 121 1.1.18.2 jdolecek void (*pbss_write_1)(bus_space_tag_t, bus_space_handle_t, bus_size_t, 122 1.1.18.2 jdolecek uint8_t); 123 1.1.18.2 jdolecek void (*pbss_write_2)(bus_space_tag_t, bus_space_handle_t, bus_size_t, 124 1.1.18.2 jdolecek uint16_t); 125 1.1.18.2 jdolecek void (*pbss_write_4)(bus_space_tag_t, bus_space_handle_t, bus_size_t, 126 1.1.18.2 jdolecek uint32_t); 127 1.1.18.2 jdolecek void (*pbss_write_8)(bus_space_tag_t, bus_space_handle_t, bus_size_t, 128 1.1.18.2 jdolecek uint64_t); 129 1.1.18.2 jdolecek }; 130 1.1.18.2 jdolecek 131 1.1.18.2 jdolecek struct or1k_bus_space_group { 132 1.1.18.2 jdolecek void (*pbsg_read_1)(bus_space_tag_t, bus_space_handle_t, 133 1.1.18.2 jdolecek bus_size_t, uint8_t *, size_t); 134 1.1.18.2 jdolecek void (*pbsg_read_2)(bus_space_tag_t, bus_space_handle_t, 135 1.1.18.2 jdolecek bus_size_t, uint16_t *, size_t); 136 1.1.18.2 jdolecek void (*pbsg_read_4)(bus_space_tag_t, bus_space_handle_t, 137 1.1.18.2 jdolecek bus_size_t, uint32_t *, size_t); 138 1.1.18.2 jdolecek void (*pbsg_read_8)(bus_space_tag_t, bus_space_handle_t, 139 1.1.18.2 jdolecek bus_size_t, uint64_t *, size_t); 140 1.1.18.2 jdolecek 141 1.1.18.2 jdolecek void (*pbsg_write_1)(bus_space_tag_t, bus_space_handle_t, 142 1.1.18.2 jdolecek bus_size_t, const uint8_t *, size_t); 143 1.1.18.2 jdolecek void (*pbsg_write_2)(bus_space_tag_t, bus_space_handle_t, 144 1.1.18.2 jdolecek bus_size_t, const uint16_t *, size_t); 145 1.1.18.2 jdolecek void (*pbsg_write_4)(bus_space_tag_t, bus_space_handle_t, 146 1.1.18.2 jdolecek bus_size_t, const uint32_t *, size_t); 147 1.1.18.2 jdolecek void (*pbsg_write_8)(bus_space_tag_t, bus_space_handle_t, 148 1.1.18.2 jdolecek bus_size_t, const uint64_t *, size_t); 149 1.1.18.2 jdolecek }; 150 1.1.18.2 jdolecek 151 1.1.18.2 jdolecek struct or1k_bus_space_set { 152 1.1.18.2 jdolecek void (*pbss_set_1)(bus_space_tag_t, bus_space_handle_t, 153 1.1.18.2 jdolecek bus_size_t, uint8_t, size_t); 154 1.1.18.2 jdolecek void (*pbss_set_2)(bus_space_tag_t, bus_space_handle_t, 155 1.1.18.2 jdolecek bus_size_t, uint16_t, size_t); 156 1.1.18.2 jdolecek void (*pbss_set_4)(bus_space_tag_t, bus_space_handle_t, 157 1.1.18.2 jdolecek bus_size_t, uint32_t, size_t); 158 1.1.18.2 jdolecek void (*pbss_set_8)(bus_space_tag_t, bus_space_handle_t, 159 1.1.18.2 jdolecek bus_size_t, uint64_t, size_t); 160 1.1.18.2 jdolecek }; 161 1.1.18.2 jdolecek 162 1.1.18.2 jdolecek struct or1k_bus_space_copy { 163 1.1.18.2 jdolecek void (*pbsc_copy_1)(bus_space_tag_t, bus_space_handle_t, 164 1.1.18.2 jdolecek bus_size_t, bus_space_handle_t, bus_size_t, size_t); 165 1.1.18.2 jdolecek void (*pbsc_copy_2)(bus_space_tag_t, bus_space_handle_t, 166 1.1.18.2 jdolecek bus_size_t, bus_space_handle_t, bus_size_t, size_t); 167 1.1.18.2 jdolecek void (*pbsc_copy_4)(bus_space_tag_t, bus_space_handle_t, 168 1.1.18.2 jdolecek bus_size_t, bus_space_handle_t, bus_size_t, size_t); 169 1.1.18.2 jdolecek void (*pbsc_copy_8)(bus_space_tag_t, bus_space_handle_t, 170 1.1.18.2 jdolecek bus_size_t, bus_space_handle_t, bus_size_t, size_t); 171 1.1.18.2 jdolecek }; 172 1.1.18.2 jdolecek 173 1.1.18.2 jdolecek struct or1k_bus_space { 174 1.1.18.2 jdolecek int pbs_flags; 175 1.1.18.2 jdolecek #define _BUS_SPACE_BIG_ENDIAN 0x00000100 176 1.1.18.2 jdolecek #define _BUS_SPACE_LITTLE_ENDIAN 0x00000000 177 1.1.18.2 jdolecek #define _BUS_SPACE_IO_TYPE 0x00000200 178 1.1.18.2 jdolecek #define _BUS_SPACE_MEM_TYPE 0x00000000 179 1.1.18.2 jdolecek #define _BUS_SPACE_STRIDE_MASK 0x0000001f 180 1.1.18.2 jdolecek bus_addr_t pbs_offset; /* offset to real start */ 181 1.1.18.2 jdolecek bus_addr_t pbs_base; /* extent base */ 182 1.1.18.2 jdolecek bus_addr_t pbs_limit; /* extent limit */ 183 1.1.18.2 jdolecek struct extent *pbs_extent; 184 1.1.18.2 jdolecek 185 1.1.18.2 jdolecek paddr_t (*pbs_mmap)(bus_space_tag_t, bus_addr_t, off_t, int, int); 186 1.1.18.2 jdolecek int (*pbs_map)(bus_space_tag_t, bus_addr_t, bus_size_t, int, 187 1.1.18.2 jdolecek bus_space_handle_t *); 188 1.1.18.2 jdolecek void (*pbs_unmap)(bus_space_tag_t, bus_space_handle_t, bus_size_t); 189 1.1.18.2 jdolecek int (*pbs_alloc)(bus_space_tag_t, bus_addr_t, bus_addr_t, bus_size_t, 190 1.1.18.2 jdolecek bus_size_t align, bus_size_t, int, bus_addr_t *, 191 1.1.18.2 jdolecek bus_space_handle_t *); 192 1.1.18.2 jdolecek void (*pbs_free)(bus_space_tag_t, bus_space_handle_t, bus_size_t); 193 1.1.18.2 jdolecek int (*pbs_subregion)(bus_space_tag_t, bus_space_handle_t, bus_size_t, 194 1.1.18.2 jdolecek bus_size_t, bus_space_handle_t *); 195 1.1.18.2 jdolecek 196 1.1.18.2 jdolecek struct or1k_bus_space_scalar pbs_scalar; 197 1.1.18.2 jdolecek struct or1k_bus_space_scalar pbs_scalar_stream; 198 1.1.18.2 jdolecek const struct or1k_bus_space_group *pbs_multi; 199 1.1.18.2 jdolecek const struct or1k_bus_space_group *pbs_multi_stream; 200 1.1.18.2 jdolecek const struct or1k_bus_space_group *pbs_region; 201 1.1.18.2 jdolecek const struct or1k_bus_space_group *pbs_region_stream; 202 1.1.18.2 jdolecek const struct or1k_bus_space_set *pbs_set; 203 1.1.18.2 jdolecek const struct or1k_bus_space_set *pbs_set_stream; 204 1.1.18.2 jdolecek const struct or1k_bus_space_copy *pbs_copy; 205 1.1.18.2 jdolecek }; 206 1.1.18.2 jdolecek 207 1.1.18.2 jdolecek #define _BUS_SPACE_STRIDE(t, o) \ 208 1.1.18.2 jdolecek ((o) << ((t)->pbs_flags & _BUS_SPACE_STRIDE_MASK)) 209 1.1.18.2 jdolecek #define _BUS_SPACE_UNSTRIDE(t, o) \ 210 1.1.18.2 jdolecek ((o) >> ((t)->pbs_flags & _BUS_SPACE_STRIDE_MASK)) 211 1.1.18.2 jdolecek 212 1.1.18.2 jdolecek #define BUS_SPACE_MAP_CACHEABLE 0x01 213 1.1.18.2 jdolecek #define BUS_SPACE_MAP_LINEAR 0x02 214 1.1.18.2 jdolecek #define BUS_SPACE_MAP_PREFETCHABLE 0x04 215 1.1.18.2 jdolecek 216 1.1.18.2 jdolecek int bus_space_init(struct or1k_bus_space *, const char *, void *, size_t); 217 1.1.18.2 jdolecek void bus_space_mallocok(void); 218 1.1.18.2 jdolecek 219 1.1.18.2 jdolecek /* 220 1.1.18.2 jdolecek * Access methods for bus resources 221 1.1.18.2 jdolecek */ 222 1.1.18.2 jdolecek 223 1.1.18.2 jdolecek #define __BUS_SPACE_HAS_STREAM_METHODS 224 1.1.18.2 jdolecek 225 1.1.18.2 jdolecek #define BUS_SPACE_BARRIER_READ 0x01 /* force read barrier */ 226 1.1.18.2 jdolecek #define BUS_SPACE_BARRIER_WRITE 0x02 /* force write barrier */ 227 1.1.18.2 jdolecek 228 1.1.18.2 jdolecek #define BUS_SPACE_ALIGNED_POINTER(p, t) ALIGNED_POINTER(p, t) 229 1.1.18.2 jdolecek 230 1.1.18.2 jdolecek /* 231 1.1.18.2 jdolecek * Bus DMA methods. 232 1.1.18.2 jdolecek */ 233 1.1.18.2 jdolecek 234 1.1.18.2 jdolecek /* 235 1.1.18.2 jdolecek * Flags used in various bus DMA methods. 236 1.1.18.2 jdolecek */ 237 1.1.18.2 jdolecek #define BUS_DMA_WAITOK 0x000 /* safe to sleep (pseudo-flag) */ 238 1.1.18.2 jdolecek #define BUS_DMA_NOWAIT 0x001 /* not safe to sleep */ 239 1.1.18.2 jdolecek #define BUS_DMA_ALLOCNOW 0x002 /* perform resource allocation now */ 240 1.1.18.2 jdolecek #define BUS_DMA_COHERENT 0x004 /* hint: map memory DMA coherent */ 241 1.1.18.2 jdolecek #define BUS_DMA_STREAMING 0x008 /* hint: sequential, unidirectional */ 242 1.1.18.2 jdolecek #define BUS_DMA_BUS1 0x010 /* placeholders for bus functions... */ 243 1.1.18.2 jdolecek #define BUS_DMA_BUS2 0x020 244 1.1.18.2 jdolecek #define BUS_DMA_BUS3 0x040 245 1.1.18.2 jdolecek #define BUS_DMA_BUS4 0x080 246 1.1.18.2 jdolecek #define BUS_DMA_READ 0x100 /* mapping is device -> memory only */ 247 1.1.18.2 jdolecek #define BUS_DMA_WRITE 0x200 /* mapping is memory -> device only */ 248 1.1.18.2 jdolecek #define BUS_DMA_NOCACHE 0x400 /* hint: map non-cached memory */ 249 1.1.18.2 jdolecek 250 1.1.18.2 jdolecek #ifndef BUS_DMA_DONTCACHE 251 1.1.18.2 jdolecek #define BUS_DMA_DONTCACHE BUS_DMA_NOCACHE 252 1.1.18.2 jdolecek #endif 253 1.1.18.2 jdolecek 254 1.1.18.2 jdolecek /* Forwards needed by prototypes below. */ 255 1.1.18.2 jdolecek struct proc; 256 1.1.18.2 jdolecek struct mbuf; 257 1.1.18.2 jdolecek struct uio; 258 1.1.18.2 jdolecek 259 1.1.18.2 jdolecek /* 260 1.1.18.2 jdolecek * Operations performed by bus_dmamap_sync(). 261 1.1.18.2 jdolecek */ 262 1.1.18.2 jdolecek #define BUS_DMASYNC_PREREAD 0x01 /* pre-read synchronization */ 263 1.1.18.2 jdolecek #define BUS_DMASYNC_POSTREAD 0x02 /* post-read synchronization */ 264 1.1.18.2 jdolecek #define BUS_DMASYNC_PREWRITE 0x04 /* pre-write synchronization */ 265 1.1.18.2 jdolecek #define BUS_DMASYNC_POSTWRITE 0x08 /* post-write synchronization */ 266 1.1.18.2 jdolecek 267 1.1.18.2 jdolecek typedef struct or1k_bus_dma_tag *bus_dma_tag_t; 268 1.1.18.2 jdolecek typedef struct or1k_bus_dmamap *bus_dmamap_t; 269 1.1.18.2 jdolecek 270 1.1.18.2 jdolecek #define BUS_DMA_TAG_VALID(t) ((t) != (bus_dma_tag_t)0) 271 1.1.18.2 jdolecek 272 1.1.18.2 jdolecek /* 273 1.1.18.2 jdolecek * bus_dma_segment_t 274 1.1.18.2 jdolecek * 275 1.1.18.2 jdolecek * Describes a single contiguous DMA transaction. Values 276 1.1.18.2 jdolecek * are suitable for programming into DMA registers. 277 1.1.18.2 jdolecek */ 278 1.1.18.2 jdolecek struct or1k_bus_dma_segment { 279 1.1.18.2 jdolecek bus_addr_t ds_addr; /* DMA address */ 280 1.1.18.2 jdolecek bus_size_t ds_len; /* length of transfer */ 281 1.1.18.2 jdolecek }; 282 1.1.18.2 jdolecek typedef struct or1k_bus_dma_segment bus_dma_segment_t; 283 1.1.18.2 jdolecek 284 1.1.18.2 jdolecek /* 285 1.1.18.2 jdolecek * bus_dma_tag_t 286 1.1.18.2 jdolecek * 287 1.1.18.2 jdolecek * A machine-dependent opaque type describing the implementation of 288 1.1.18.2 jdolecek * DMA for a given bus. 289 1.1.18.2 jdolecek */ 290 1.1.18.2 jdolecek 291 1.1.18.2 jdolecek struct or1k_bus_dma_tag { 292 1.1.18.2 jdolecek /* 293 1.1.18.2 jdolecek * The `bounce threshold' is checked while we are loading 294 1.1.18.2 jdolecek * the DMA map. If the physical address of the segment 295 1.1.18.2 jdolecek * exceeds the threshold, an error will be returned. The 296 1.1.18.2 jdolecek * caller can then take whatever action is necessary to 297 1.1.18.2 jdolecek * bounce the transfer. If this value is 0, it will be 298 1.1.18.2 jdolecek * ignored. 299 1.1.18.2 jdolecek */ 300 1.1.18.2 jdolecek bus_addr_t _bounce_thresh; 301 1.1.18.2 jdolecek 302 1.1.18.2 jdolecek /* 303 1.1.18.2 jdolecek * DMA mapping methods. 304 1.1.18.2 jdolecek */ 305 1.1.18.2 jdolecek int (*_dmamap_create) (bus_dma_tag_t, bus_size_t, int, 306 1.1.18.2 jdolecek bus_size_t, bus_size_t, int, bus_dmamap_t *); 307 1.1.18.2 jdolecek void (*_dmamap_destroy) (bus_dma_tag_t, bus_dmamap_t); 308 1.1.18.2 jdolecek int (*_dmamap_load) (bus_dma_tag_t, bus_dmamap_t, void *, 309 1.1.18.2 jdolecek bus_size_t, struct proc *, int); 310 1.1.18.2 jdolecek int (*_dmamap_load_mbuf) (bus_dma_tag_t, bus_dmamap_t, 311 1.1.18.2 jdolecek struct mbuf *, int); 312 1.1.18.2 jdolecek int (*_dmamap_load_uio) (bus_dma_tag_t, bus_dmamap_t, 313 1.1.18.2 jdolecek struct uio *, int); 314 1.1.18.2 jdolecek int (*_dmamap_load_raw) (bus_dma_tag_t, bus_dmamap_t, 315 1.1.18.2 jdolecek bus_dma_segment_t *, int, bus_size_t, int); 316 1.1.18.2 jdolecek void (*_dmamap_unload) (bus_dma_tag_t, bus_dmamap_t); 317 1.1.18.2 jdolecek void (*_dmamap_sync) (bus_dma_tag_t, bus_dmamap_t, 318 1.1.18.2 jdolecek bus_addr_t, bus_size_t, int); 319 1.1.18.2 jdolecek 320 1.1.18.2 jdolecek /* 321 1.1.18.2 jdolecek * DMA memory utility functions. 322 1.1.18.2 jdolecek */ 323 1.1.18.2 jdolecek int (*_dmamem_alloc) (bus_dma_tag_t, bus_size_t, bus_size_t, 324 1.1.18.2 jdolecek bus_size_t, bus_dma_segment_t *, int, int *, int); 325 1.1.18.2 jdolecek void (*_dmamem_free) (bus_dma_tag_t, 326 1.1.18.2 jdolecek bus_dma_segment_t *, int); 327 1.1.18.2 jdolecek int (*_dmamem_map) (bus_dma_tag_t, bus_dma_segment_t *, 328 1.1.18.2 jdolecek int, size_t, void **, int); 329 1.1.18.2 jdolecek void (*_dmamem_unmap) (bus_dma_tag_t, void *, size_t); 330 1.1.18.2 jdolecek paddr_t (*_dmamem_mmap) (bus_dma_tag_t, bus_dma_segment_t *, 331 1.1.18.2 jdolecek int, off_t, int, int); 332 1.1.18.2 jdolecek 333 1.1.18.2 jdolecek #ifndef PHYS_TO_BUS_MEM 334 1.1.18.2 jdolecek bus_addr_t (*_dma_phys_to_bus_mem)(bus_dma_tag_t, bus_addr_t); 335 1.1.18.2 jdolecek #define PHYS_TO_BUS_MEM(t, addr) (*(t)->_dma_phys_to_bus_mem)((t), (addr)) 336 1.1.18.2 jdolecek #endif 337 1.1.18.2 jdolecek #ifndef BUS_MEM_TO_PHYS 338 1.1.18.2 jdolecek bus_addr_t (*_dma_bus_mem_to_phys)(bus_dma_tag_t, bus_addr_t); 339 1.1.18.2 jdolecek #define BUS_MEM_TO_PHYS(t, addr) (*(t)->_dma_bus_mem_to_phys)((t), (addr)) 340 1.1.18.2 jdolecek #endif 341 1.1.18.2 jdolecek }; 342 1.1.18.2 jdolecek 343 1.1.18.2 jdolecek /* 344 1.1.18.2 jdolecek * bus_dmamap_t 345 1.1.18.2 jdolecek * 346 1.1.18.2 jdolecek * Describes a DMA mapping. 347 1.1.18.2 jdolecek */ 348 1.1.18.2 jdolecek struct or1k_bus_dmamap { 349 1.1.18.2 jdolecek /* 350 1.1.18.2 jdolecek * PRIVATE MEMBERS: not for use my machine-independent code. 351 1.1.18.2 jdolecek */ 352 1.1.18.2 jdolecek bus_size_t _dm_size; /* largest DMA transfer mappable */ 353 1.1.18.2 jdolecek int _dm_segcnt; /* number of segs this map can map */ 354 1.1.18.2 jdolecek bus_size_t _dm_maxmaxsegsz; /* fixed largest possible segment */ 355 1.1.18.2 jdolecek bus_size_t _dm_boundary; /* don't cross this */ 356 1.1.18.2 jdolecek bus_addr_t _dm_bounce_thresh; /* bounce threshold; see tag */ 357 1.1.18.2 jdolecek int _dm_flags; /* misc. flags */ 358 1.1.18.2 jdolecek 359 1.1.18.2 jdolecek void *_dm_cookie; /* cookie for bus-specific functions */ 360 1.1.18.2 jdolecek 361 1.1.18.2 jdolecek /* 362 1.1.18.2 jdolecek * PUBLIC MEMBERS: these are used by machine-independent code. 363 1.1.18.2 jdolecek */ 364 1.1.18.2 jdolecek bus_size_t dm_maxsegsz; /* largest possible segment */ 365 1.1.18.2 jdolecek bus_size_t dm_mapsize; /* size of the mapping */ 366 1.1.18.2 jdolecek int dm_nsegs; /* # valid segments in mapping */ 367 1.1.18.2 jdolecek bus_dma_segment_t dm_segs[1]; /* segments; variable length */ 368 1.1.18.2 jdolecek }; 369 1.1.18.2 jdolecek 370 1.1.18.2 jdolecek #endif /* _OR1K_BUS_DEFS_H_ */ 371
Indexes created Wed Oct 29 01:09:52 GMT 2025