isa_io.c revision 1.13
1 /* $NetBSD: isa_io.c,v 1.13 2016/08/26 20:19:45 macallan Exp $ */ 2 3 /* 4 * Copyright 1997 5 * Digital Equipment Corporation. All rights reserved. 6 * 7 * This software is furnished under license and may be used and 8 * copied only in accordance with the following terms and conditions. 9 * Subject to these conditions, you may download, copy, install, 10 * use, modify and distribute this software in source and/or binary 11 * form. No title or ownership is transferred hereby. 12 * 13 * 1) Any source code used, modified or distributed must reproduce 14 * and retain this copyright notice and list of conditions as 15 * they appear in the source file. 16 * 17 * 2) No right is granted to use any trade name, trademark, or logo of 18 * Digital Equipment Corporation. Neither the "Digital Equipment 19 * Corporation" name nor any trademark or logo of Digital Equipment 20 * Corporation may be used to endorse or promote products derived 21 * from this software without the prior written permission of 22 * Digital Equipment Corporation. 23 * 24 * 3) This software is provided "AS-IS" and any express or implied 25 * warranties, including but not limited to, any implied warranties 26 * of merchantability, fitness for a particular purpose, or 27 * non-infringement are disclaimed. In no event shall DIGITAL be 28 * liable for any damages whatsoever, and in particular, DIGITAL 29 * shall not be liable for special, indirect, consequential, or 30 * incidental damages or damages for lost profits, loss of 31 * revenue or loss of use, whether such damages arise in contract, 32 * negligence, tort, under statute, in equity, at law or otherwise, 33 * even if advised of the possibility of such damage. 34 */ 35 36 /* 37 * bus_space I/O functions for isa 38 */ 39 40 #include <sys/cdefs.h> 41 __KERNEL_RCSID(0, "$NetBSD: isa_io.c,v 1.13 2016/08/26 20:19:45 macallan Exp $"); 42 43 #include <sys/param.h> 44 #include <sys/systm.h> 45 #include <sys/bus.h> 46 #include <machine/pio.h> 47 #include <machine/isa_machdep.h> 48 #include <machine/ofw.h> 49 #include "igsfb_ofbus.h" 50 #include "chipsfb_ofbus.h" 51 52 #if NIGSFB_OFBUS > 0 53 extern vaddr_t igsfb_mem_vaddr, igsfb_mmio_vaddr; 54 extern paddr_t igsfb_mem_paddr; 55 #endif 56 57 #if NCHIPSFB_OFBUS > 0 58 extern vaddr_t chipsfb_mem_vaddr, chipsfb_mmio_vaddr; 59 extern paddr_t chipsfb_mem_paddr; 60 #endif 61 62 /* Proto types for all the bus_space structure functions */ 63 64 bs_protos(isa); 65 bs_protos(bs_notimpl); 66 67 /* 68 * Declare the isa bus space tags 69 * The IO and MEM structs are identical, except for the cookies, 70 * which contain the address space bases. 71 */ 72 73 /* 74 * NOTE: ASSEMBLY LANGUAGE RELIES ON THE COOKIE -- THE FIRST MEMBER OF 75 * THIS STRUCTURE -- TO BE THE VIRTUAL ADDRESS OF ISA/IO! 76 */ 77 struct bus_space isa_io_bs_tag = { 78 /* cookie */ 79 NULL, /* initialized below */ 80 81 /* mapping/unmapping */ 82 isa_bs_map, 83 isa_bs_unmap, 84 isa_bs_subregion, 85 86 /* allocation/deallocation */ 87 isa_bs_alloc, 88 isa_bs_free, 89 90 /* get kernel virtual address */ 91 isa_bs_vaddr, 92 93 /* mmap bus space for userland */ 94 isa_bs_mmap, 95 96 /* barrier */ 97 isa_bs_barrier, 98 99 /* read (single) */ 100 isa_bs_r_1, 101 isa_bs_r_2, 102 isa_bs_r_4, 103 bs_notimpl_bs_r_8, 104 105 /* read multiple */ 106 isa_bs_rm_1, 107 isa_bs_rm_2, 108 isa_bs_rm_4, 109 bs_notimpl_bs_rm_8, 110 111 /* read region */ 112 isa_bs_rr_1, 113 isa_bs_rr_2, 114 isa_bs_rr_4, 115 bs_notimpl_bs_rr_8, 116 117 /* write (single) */ 118 isa_bs_w_1, 119 isa_bs_w_2, 120 isa_bs_w_4, 121 bs_notimpl_bs_w_8, 122 123 /* write multiple */ 124 isa_bs_wm_1, 125 isa_bs_wm_2, 126 isa_bs_wm_4, 127 bs_notimpl_bs_wm_8, 128 129 /* write region */ 130 isa_bs_wr_1, 131 isa_bs_wr_2, 132 isa_bs_wr_4, 133 bs_notimpl_bs_wr_8, 134 135 /* set multiple */ 136 bs_notimpl_bs_sm_1, 137 bs_notimpl_bs_sm_2, 138 bs_notimpl_bs_sm_4, 139 bs_notimpl_bs_sm_8, 140 141 /* set region */ 142 bs_notimpl_bs_sr_1, 143 isa_bs_sr_2, 144 bs_notimpl_bs_sr_4, 145 bs_notimpl_bs_sr_8, 146 147 /* copy */ 148 bs_notimpl_bs_c_1, 149 isa_bs_c_2, 150 bs_notimpl_bs_c_4, 151 bs_notimpl_bs_c_8, 152 153 /* stream methods are identical to regular read/write here */ 154 /* read stream single */ 155 isa_bs_r_1, 156 isa_bs_r_2, 157 isa_bs_r_4, 158 bs_notimpl_bs_r_8, 159 160 /* read stream multiple */ 161 isa_bs_rm_1, 162 isa_bs_rm_2, 163 isa_bs_rm_4, 164 bs_notimpl_bs_rm_8, 165 166 /* read region stream */ 167 isa_bs_rr_1, 168 isa_bs_rr_2, 169 isa_bs_rr_4, 170 bs_notimpl_bs_rr_8, 171 172 /* write stream single */ 173 isa_bs_w_1, 174 isa_bs_w_2, 175 isa_bs_w_4, 176 bs_notimpl_bs_w_8, 177 178 /* write stream multiple */ 179 isa_bs_wm_1, 180 isa_bs_wm_2, 181 isa_bs_wm_4, 182 bs_notimpl_bs_wm_8, 183 184 /* write region stream */ 185 isa_bs_wr_1, 186 isa_bs_wr_2, 187 isa_bs_wr_4, 188 bs_notimpl_bs_wr_8, 189 190 }; 191 192 /* 193 * NOTE: ASSEMBLY LANGUAGE RELIES ON THE COOKIE -- THE FIRST MEMBER OF 194 * THIS STRUCTURE -- TO BE THE VIRTUAL ADDRESS OF ISA/MEMORY! 195 */ 196 struct bus_space isa_mem_bs_tag = { 197 /* cookie */ 198 NULL, /* initialized below */ 199 200 /* mapping/unmapping */ 201 isa_bs_map, 202 isa_bs_unmap, 203 isa_bs_subregion, 204 205 /* allocation/deallocation */ 206 isa_bs_alloc, 207 isa_bs_free, 208 209 /* get kernel virtual address */ 210 isa_bs_vaddr, 211 212 /* mmap bus space for userland */ 213 isa_bs_mmap, 214 215 /* barrier */ 216 isa_bs_barrier, 217 218 /* read (single) */ 219 isa_bs_r_1, 220 isa_bs_r_2, 221 isa_bs_r_4, 222 bs_notimpl_bs_r_8, 223 224 /* read multiple */ 225 isa_bs_rm_1, 226 isa_bs_rm_2, 227 isa_bs_rm_4, 228 bs_notimpl_bs_rm_8, 229 230 /* read region */ 231 isa_bs_rr_1, 232 isa_bs_rr_2, 233 isa_bs_rr_4, 234 bs_notimpl_bs_rr_8, 235 236 /* write (single) */ 237 isa_bs_w_1, 238 isa_bs_w_2, 239 isa_bs_w_4, 240 bs_notimpl_bs_w_8, 241 242 /* write multiple */ 243 isa_bs_wm_1, 244 isa_bs_wm_2, 245 isa_bs_wm_4, 246 bs_notimpl_bs_wm_8, 247 248 /* write region */ 249 isa_bs_wr_1, 250 isa_bs_wr_2, 251 isa_bs_wr_4, 252 bs_notimpl_bs_wr_8, 253 254 /* set multiple */ 255 bs_notimpl_bs_sm_1, 256 bs_notimpl_bs_sm_2, 257 bs_notimpl_bs_sm_4, 258 bs_notimpl_bs_sm_8, 259 260 /* set region */ 261 bs_notimpl_bs_sr_1, 262 isa_bs_sr_2, 263 bs_notimpl_bs_sr_4, 264 bs_notimpl_bs_sr_8, 265 266 /* copy */ 267 bs_notimpl_bs_c_1, 268 isa_bs_c_2, 269 bs_notimpl_bs_c_4, 270 bs_notimpl_bs_c_8, 271 272 /* stream methods are identical to regular read/write here */ 273 /* read stream single */ 274 isa_bs_r_1, 275 isa_bs_r_2, 276 isa_bs_r_4, 277 bs_notimpl_bs_r_8, 278 279 /* read stream multiple */ 280 isa_bs_rm_1, 281 isa_bs_rm_2, 282 isa_bs_rm_4, 283 bs_notimpl_bs_rm_8, 284 285 /* read region stream */ 286 isa_bs_rr_1, 287 isa_bs_rr_2, 288 isa_bs_rr_4, 289 bs_notimpl_bs_rr_8, 290 291 /* write stream single */ 292 isa_bs_w_1, 293 isa_bs_w_2, 294 isa_bs_w_4, 295 bs_notimpl_bs_w_8, 296 297 /* write stream multiple */ 298 isa_bs_wm_1, 299 isa_bs_wm_2, 300 isa_bs_wm_4, 301 bs_notimpl_bs_wm_8, 302 303 /* write region stream */ 304 isa_bs_wr_1, 305 isa_bs_wr_2, 306 isa_bs_wr_4, 307 bs_notimpl_bs_wr_8, 308 }; 309 310 /* bus space functions */ 311 312 void 313 isa_io_init(vaddr_t isa_io_addr, vaddr_t isa_mem_addr) 314 { 315 isa_io_bs_tag.bs_cookie = (void *)isa_io_addr; 316 isa_mem_bs_tag.bs_cookie = (void *)isa_mem_addr; 317 } 318 319 /* 320 * break the abstraction: sometimes, other parts of the system 321 * (e.g. X servers) need to map ISA space directly. use these 322 * functions sparingly! 323 */ 324 vaddr_t 325 isa_io_data_vaddr(void) 326 { 327 return (vaddr_t)isa_io_bs_tag.bs_cookie; 328 } 329 330 vaddr_t 331 isa_mem_data_vaddr(void) 332 { 333 return (vaddr_t)isa_mem_bs_tag.bs_cookie; 334 } 335 336 int 337 isa_bs_map(void *t, bus_addr_t bpa, bus_size_t size, int cacheable, bus_space_handle_t *bshp) 338 { 339 *bshp = bpa + (bus_addr_t)t; 340 return(0); 341 } 342 343 void 344 isa_bs_unmap(void *t, bus_space_handle_t bsh, bus_size_t size) 345 { 346 /* Nothing to do. */ 347 } 348 349 paddr_t 350 isa_bs_mmap(void *cookie, bus_addr_t addr, off_t off, int prot, 351 int flags) 352 { 353 paddr_t paddr, ret; 354 355 #ifdef OFISA_DEBUG 356 printf("mmap %08x %08x %08x", (uint32_t)cookie, (uint32_t)addr, (uint32_t)off); 357 #endif 358 #if NIGSFB_OFBUS > 0 359 if ((vaddr_t)cookie == igsfb_mem_vaddr) { 360 paddr = igsfb_mem_paddr; 361 } else 362 #endif 363 #if NCHIPSFB_OFBUS > 0 364 if ((vaddr_t)cookie == chipsfb_mem_vaddr) { 365 paddr = chipsfb_mem_paddr; 366 } else 367 #endif 368 paddr = ofw_gettranslation((vaddr_t)cookie); 369 370 if (paddr == -1) { 371 #ifdef OFISA_DEBUG 372 printf(" no translation\n"); 373 #endif 374 return -1; 375 } 376 ret = paddr + addr + off; 377 #ifdef OFISA_DEBUG 378 printf(" -> %08x %08x\n", (uint32_t)paddr, (uint32_t)ret); 379 #endif 380 return arm_btop(ret); 381 } 382 383 int 384 isa_bs_subregion(void *t, bus_space_handle_t bsh, bus_size_t offset, bus_size_t size, bus_space_handle_t *nbshp) 385 { 386 /* printf("isa_subregion(tag=%p, bsh=%lx, off=%lx, sz=%lx)\n", 387 t, bsh, offset, size);*/ 388 *nbshp = bsh + offset; 389 return(0); 390 } 391 392 int 393 isa_bs_alloc(void *t, bus_addr_t rstart, bus_addr_t rend, bus_size_t size, 394 bus_size_t alignment, bus_size_t boundary, int cacheable, 395 bus_addr_t *bpap, bus_space_handle_t *bshp) 396 { 397 panic("isa_alloc(): Help!"); 398 } 399 400 void 401 isa_bs_free(void *t, bus_space_handle_t bsh, bus_size_t size) 402 { 403 panic("isa_free(): Help!"); 404 } 405 406 void * 407 isa_bs_vaddr(void *t, bus_space_handle_t bsh) 408 { 409 410 return ((void *)bsh); 411 } 412 413 void 414 isa_bs_barrier(void *t, bus_space_handle_t bsh, bus_size_t offset, bus_size_t len, int flags) 415 { 416 /* just return */ 417 } 418
Indexes created Thu Sep 25 16:09:42 GMT 2025