bus_space.c revision 1.3
1 /* $NetBSD: bus_space.c,v 1.3 2007/12/15 00:39:16 perry Exp $ */ 2 3 /*- 4 * Copyright (c) 2001, 2004, 2005 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the NetBSD 18 * Foundation, Inc. and its contributors. 19 * 4. Neither the name of The NetBSD Foundation nor the names of its 20 * contributors may be used to endorse or promote products derived 21 * from this software without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 24 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 25 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 26 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 27 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 30 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 31 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 32 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 33 * POSSIBILITY OF SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 __KERNEL_RCSID(0, "$NetBSD: bus_space.c,v 1.3 2007/12/15 00:39:16 perry Exp $"); 38 39 #include <sys/param.h> 40 #include <sys/systm.h> 41 #include <sys/malloc.h> 42 #include <sys/extent.h> 43 44 #define _EWS4800MIPS_BUS_SPACE_PRIVATE 45 #include <machine/bus.h> 46 #include <machine/sbdvar.h> 47 48 #ifdef BUS_SPACE_DEBUG 49 int bus_space_debug = 0; 50 #define DPRINTF(fmt, args...) \ 51 if (bus_space_debug) \ 52 printf("%s: " fmt, __func__ , ##args) 53 #define DPRINTFN(n, arg) \ 54 if (bus_space_debug > (n)) \ 55 printf("%s: " fmt, __func__ , ##args) 56 #else 57 #define DPRINTF(arg...) ((void)0) 58 #define DPRINTFN(n, arg...) ((void)0) 59 #endif 60 61 #define VADDR(h, o) (h + o) 62 _BUS_SPACE_READ(_default, 1, 8) 63 _BUS_SPACE_READ(_default, 2, 16) 64 _BUS_SPACE_READ(_default, 4, 32) 65 _BUS_SPACE_READ(_default, 8, 64) 66 _BUS_SPACE_READ_MULTI(_default, 1, 8) 67 _BUS_SPACE_READ_MULTI(_default, 2, 16) 68 _BUS_SPACE_READ_MULTI(_default, 4, 32) 69 _BUS_SPACE_READ_MULTI(_default, 8, 64) 70 _BUS_SPACE_READ_REGION(_default, 1, 8) 71 _BUS_SPACE_READ_REGION(_default, 2, 16) 72 _BUS_SPACE_READ_REGION(_default, 4, 32) 73 _BUS_SPACE_READ_REGION(_default, 8, 64) 74 _BUS_SPACE_WRITE(_default, 1, 8) 75 _BUS_SPACE_WRITE(_default, 2, 16) 76 _BUS_SPACE_WRITE(_default, 4, 32) 77 _BUS_SPACE_WRITE(_default, 8, 64) 78 _BUS_SPACE_WRITE_MULTI(_default, 1, 8) 79 _BUS_SPACE_WRITE_MULTI(_default, 2, 16) 80 _BUS_SPACE_WRITE_MULTI(_default, 4, 32) 81 _BUS_SPACE_WRITE_MULTI(_default, 8, 64) 82 _BUS_SPACE_WRITE_REGION(_default, 1, 8) 83 _BUS_SPACE_WRITE_REGION(_default, 2, 16) 84 _BUS_SPACE_WRITE_REGION(_default, 4, 32) 85 _BUS_SPACE_WRITE_REGION(_default, 8, 64) 86 _BUS_SPACE_SET_MULTI(_default, 1, 8) 87 _BUS_SPACE_SET_MULTI(_default, 2, 16) 88 _BUS_SPACE_SET_MULTI(_default, 4, 32) 89 _BUS_SPACE_SET_MULTI(_default, 8, 64) 90 _BUS_SPACE_SET_REGION(_default, 1, 8) 91 _BUS_SPACE_SET_REGION(_default, 2, 16) 92 _BUS_SPACE_SET_REGION(_default, 4, 32) 93 _BUS_SPACE_SET_REGION(_default, 8, 64) 94 _BUS_SPACE_COPY_REGION(_default, 1, 8) 95 _BUS_SPACE_COPY_REGION(_default, 2, 16) 96 _BUS_SPACE_COPY_REGION(_default, 4, 32) 97 _BUS_SPACE_COPY_REGION(_default, 8, 64) 98 #undef VADDR 99 100 static int _default_map(void *, bus_addr_t, bus_size_t, int, 101 bus_space_handle_t *); 102 static void _default_unmap(void *, bus_space_handle_t, bus_size_t); 103 static int _default_subregion(void *, bus_space_handle_t, bus_size_t, 104 bus_size_t, bus_space_handle_t *); 105 static int _default_alloc(void *, bus_addr_t, bus_addr_t, bus_size_t, 106 bus_size_t, bus_size_t, int, bus_addr_t *, bus_space_handle_t *); 107 static void _default_free(void *, bus_space_handle_t, bus_size_t); 108 static void *_default_vaddr(void *, bus_space_handle_t); 109 110 static const struct ews4800mips_bus_space _default_bus_space = { 111 .ebs_map = _default_map, 112 .ebs_unmap = _default_unmap, 113 .ebs_subregion = _default_subregion, 114 .ebs_alloc = _default_alloc, 115 .ebs_free = _default_free, 116 .ebs_vaddr = _default_vaddr, 117 .ebs_r_1 = _default_read_1, 118 .ebs_r_2 = _default_read_2, 119 .ebs_r_4 = _default_read_4, 120 .ebs_r_8 = _default_read_8, 121 .ebs_rm_1 = _default_read_multi_1, 122 .ebs_rm_2 = _default_read_multi_2, 123 .ebs_rm_4 = _default_read_multi_4, 124 .ebs_rm_8 = _default_read_multi_8, 125 .ebs_rr_1 = _default_read_region_1, 126 .ebs_rr_2 = _default_read_region_2, 127 .ebs_rr_4 = _default_read_region_4, 128 .ebs_rr_8 = _default_read_region_8, 129 .ebs_w_1 = _default_write_1, 130 .ebs_w_2 = _default_write_2, 131 .ebs_w_4 = _default_write_4, 132 .ebs_w_8 = _default_write_8, 133 .ebs_wm_1 = _default_write_multi_1, 134 .ebs_wm_2 = _default_write_multi_2, 135 .ebs_wm_4 = _default_write_multi_4, 136 .ebs_wm_8 = _default_write_multi_8, 137 .ebs_wr_1 = _default_write_region_1, 138 .ebs_wr_2 = _default_write_region_2, 139 .ebs_wr_4 = _default_write_region_4, 140 .ebs_wr_8 = _default_write_region_8, 141 .ebs_sm_1 = _default_set_multi_1, 142 .ebs_sm_2 = _default_set_multi_2, 143 .ebs_sm_4 = _default_set_multi_4, 144 .ebs_sm_8 = _default_set_multi_8, 145 .ebs_sr_1 = _default_set_region_1, 146 .ebs_sr_2 = _default_set_region_2, 147 .ebs_sr_4 = _default_set_region_4, 148 .ebs_sr_8 = _default_set_region_8, 149 .ebs_c_1 = _default_copy_region_1, 150 .ebs_c_2 = _default_copy_region_2, 151 .ebs_c_4 = _default_copy_region_4, 152 .ebs_c_8 = _default_copy_region_8 153 }; 154 155 /* create default bus_space_tag */ 156 int 157 bus_space_create(bus_space_tag_t t, const char *name, 158 bus_addr_t addr, bus_size_t size) 159 { 160 struct ews4800mips_bus_space *ebs = t; 161 162 if (ebs == NULL) 163 return EFAULT; 164 165 /* set default method */ 166 *ebs = _default_bus_space; /* structure assignment */ 167 ebs->ebs_cookie = ebs; 168 169 /* set access region */ 170 if (size == 0) { 171 /* no extent */ 172 ebs->ebs_base_addr = addr; 173 ebs->ebs_size = size; 174 } else { 175 ebs->ebs_extent = extent_create(name, addr, addr + size - 1, 176 M_DEVBUF, 0, 0, EX_NOWAIT); 177 if (ebs->ebs_extent == NULL) { 178 panic("%s:: unable to create bus_space for " 179 "0x%08lx-%#lx", __func__, addr, size); 180 } 181 } 182 183 return 0; 184 } 185 186 void 187 bus_space_destroy(bus_space_tag_t t) 188 { 189 struct ews4800mips_bus_space *ebs = t; 190 struct extent *ex = ebs->ebs_extent; 191 192 if (ex != NULL) 193 extent_destroy(ex); 194 } 195 196 void 197 _bus_space_invalid_access(void) 198 { 199 200 panic("invalid bus space access."); 201 } 202 203 /* default bus_space tag */ 204 static int 205 _default_map(void *t, bus_addr_t bpa, bus_size_t size, int flags, 206 bus_space_handle_t *bshp) 207 { 208 struct ews4800mips_bus_space *ebs = t; 209 struct extent *ex = ebs->ebs_extent; 210 int error; 211 212 if (ex == NULL) { 213 if (bpa + size > ebs->ebs_size) 214 return EFAULT; 215 *bshp = (bus_space_handle_t)(ebs->ebs_base_addr + bpa); 216 return 0; 217 } 218 219 bpa += ex->ex_start; 220 error = extent_alloc_region(ex, bpa, size, EX_NOWAIT | EX_MALLOCOK); 221 222 if (error) { 223 DPRINTF("failed.\n"); 224 return error; 225 } 226 227 *bshp = (bus_space_handle_t)bpa; 228 229 DPRINTF("success.\n"); 230 231 return 0; 232 } 233 234 static int 235 _default_subregion(void *t, bus_space_handle_t bsh, 236 bus_size_t offset, bus_size_t size, bus_space_handle_t *nbshp) 237 { 238 239 *nbshp = bsh + offset; 240 241 return 0; 242 } 243 244 static int 245 _default_alloc(void *t, bus_addr_t rstart, bus_addr_t rend, 246 bus_size_t size, bus_size_t alignment, bus_size_t boundary, 247 int flags, bus_addr_t *bpap, bus_space_handle_t *bshp) 248 { 249 struct ews4800mips_bus_space *ebs = t; 250 struct extent *ex = ebs->ebs_extent; 251 u_long bpa, base; 252 int error; 253 254 if (ex == NULL) { 255 if (rend > ebs->ebs_size) 256 return EFAULT; 257 *bshp = *bpap = rstart + ebs->ebs_base_addr; 258 return 0; 259 } 260 261 base = ex->ex_start; 262 263 error = extent_alloc_subregion(ex, rstart + base, rend + base, size, 264 alignment, boundary, 265 EX_FAST | EX_NOWAIT | EX_MALLOCOK, 266 &bpa); 267 268 if (error) { 269 DPRINTF("failed.\n"); 270 return error; 271 } 272 273 *bshp = (bus_space_handle_t)bpa; 274 275 if (bpap) 276 *bpap = bpa; 277 278 DPRINTF("success.\n"); 279 280 return 0; 281 } 282 283 static void 284 _default_free(void *t, bus_space_handle_t bsh, bus_size_t size) 285 { 286 struct ews4800mips_bus_space *ebs = t; 287 struct extent *ex = ebs->ebs_extent; 288 289 if (ex != NULL) 290 _default_unmap(t, bsh, size); 291 } 292 293 static void 294 _default_unmap(void *t, bus_space_handle_t bsh, bus_size_t size) 295 { 296 struct ews4800mips_bus_space *ebs = t; 297 struct extent *ex = ebs->ebs_extent; 298 int error; 299 300 if (ex == NULL) 301 return; 302 303 error = extent_free(ex, bsh, size, EX_NOWAIT); 304 305 if (error) { 306 DPRINTF("%#lx-%#lx of %s space lost\n", bsh, bsh + size, 307 ex->ex_name); 308 } 309 } 310 311 void * 312 _default_vaddr(void *t, bus_space_handle_t h) 313 { 314 315 return (void *)h; 316 } 317
Indexes created Wed Oct 01 19:09:53 GMT 2025