isa_io.c revision 1.4
1 /* $NetBSD: isa_io.c,v 1.4 2005/01/05 10:25:43 tsutsui 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 1.4 2005/01/05 10:25:43 tsutsui Exp $"); 42 43 #include <sys/param.h> 44 #include <sys/systm.h> 45 #include <machine/bus.h> 46 #include <machine/pio.h> 47 #include <machine/isa_machdep.h> 48 49 /* Proto types for all the bus_space structure functions */ 50 51 bs_protos(isa); 52 bs_protos(bs_notimpl); 53 54 /* 55 * Declare the isa bus space tags 56 * The IO and MEM structs are identical, except for the cookies, 57 * which contain the address space bases. 58 */ 59 60 /* 61 * NOTE: ASSEMBLY LANGUAGE RELIES ON THE COOKIE -- THE FIRST MEMBER OF 62 * THIS STRUCTURE -- TO BE THE VIRTUAL ADDRESS OF ISA/IO! 63 */ 64 struct bus_space isa_io_bs_tag = { 65 /* cookie */ 66 NULL, /* initialized below */ 67 68 /* mapping/unmapping */ 69 isa_bs_map, 70 isa_bs_unmap, 71 isa_bs_subregion, 72 73 /* allocation/deallocation */ 74 isa_bs_alloc, 75 isa_bs_free, 76 77 /* get kernel virtual address */ 78 isa_bs_vaddr, 79 80 /* mmap bus space for userland */ 81 bs_notimpl_bs_mmap, /* XXX possible even? XXX */ 82 83 /* barrier */ 84 isa_bs_barrier, 85 86 /* read (single) */ 87 isa_bs_r_1, 88 isa_bs_r_2, 89 isa_bs_r_4, 90 bs_notimpl_bs_r_8, 91 92 /* read multiple */ 93 isa_bs_rm_1, 94 isa_bs_rm_2, 95 isa_bs_rm_4, 96 bs_notimpl_bs_rm_8, 97 98 /* read region */ 99 isa_bs_rr_1, 100 isa_bs_rr_2, 101 isa_bs_rr_4, 102 bs_notimpl_bs_rr_8, 103 104 /* write (single) */ 105 isa_bs_w_1, 106 isa_bs_w_2, 107 isa_bs_w_4, 108 bs_notimpl_bs_w_8, 109 110 /* write multiple */ 111 isa_bs_wm_1, 112 isa_bs_wm_2, 113 isa_bs_wm_4, 114 bs_notimpl_bs_wm_8, 115 116 /* write region */ 117 isa_bs_wr_1, 118 isa_bs_wr_2, 119 isa_bs_wr_4, 120 bs_notimpl_bs_wr_8, 121 122 /* set multiple */ 123 bs_notimpl_bs_sm_1, 124 bs_notimpl_bs_sm_2, 125 bs_notimpl_bs_sm_4, 126 bs_notimpl_bs_sm_8, 127 128 /* set region */ 129 bs_notimpl_bs_sr_1, 130 isa_bs_sr_2, 131 bs_notimpl_bs_sr_4, 132 bs_notimpl_bs_sr_8, 133 134 /* copy */ 135 bs_notimpl_bs_c_1, 136 bs_notimpl_bs_c_2, 137 bs_notimpl_bs_c_4, 138 bs_notimpl_bs_c_8, 139 }; 140 141 /* 142 * NOTE: ASSEMBLY LANGUAGE RELIES ON THE COOKIE -- THE FIRST MEMBER OF 143 * THIS STRUCTURE -- TO BE THE VIRTUAL ADDRESS OF ISA/MEMORY! 144 */ 145 struct bus_space isa_mem_bs_tag = { 146 /* cookie */ 147 NULL, /* initialized below */ 148 149 /* mapping/unmapping */ 150 isa_bs_map, 151 isa_bs_unmap, 152 isa_bs_subregion, 153 154 /* allocation/deallocation */ 155 isa_bs_alloc, 156 isa_bs_free, 157 158 /* get kernel virtual address */ 159 isa_bs_vaddr, 160 161 /* mmap bus space for userland */ 162 bs_notimpl_bs_mmap, /* XXX open for now ... XXX */ 163 164 /* barrier */ 165 isa_bs_barrier, 166 167 /* read (single) */ 168 isa_bs_r_1, 169 isa_bs_r_2, 170 isa_bs_r_4, 171 bs_notimpl_bs_r_8, 172 173 /* read multiple */ 174 isa_bs_rm_1, 175 isa_bs_rm_2, 176 isa_bs_rm_4, 177 bs_notimpl_bs_rm_8, 178 179 /* read region */ 180 isa_bs_rr_1, 181 isa_bs_rr_2, 182 isa_bs_rr_4, 183 bs_notimpl_bs_rr_8, 184 185 /* write (single) */ 186 isa_bs_w_1, 187 isa_bs_w_2, 188 isa_bs_w_4, 189 bs_notimpl_bs_w_8, 190 191 /* write multiple */ 192 isa_bs_wm_1, 193 isa_bs_wm_2, 194 isa_bs_wm_4, 195 bs_notimpl_bs_wm_8, 196 197 /* write region */ 198 isa_bs_wr_1, 199 isa_bs_wr_2, 200 isa_bs_wr_4, 201 bs_notimpl_bs_wr_8, 202 203 /* set multiple */ 204 bs_notimpl_bs_sm_1, 205 bs_notimpl_bs_sm_2, 206 bs_notimpl_bs_sm_4, 207 bs_notimpl_bs_sm_8, 208 209 /* set region */ 210 bs_notimpl_bs_sr_1, 211 isa_bs_sr_2, 212 bs_notimpl_bs_sr_4, 213 bs_notimpl_bs_sr_8, 214 215 /* copy */ 216 bs_notimpl_bs_c_1, 217 bs_notimpl_bs_c_2, 218 bs_notimpl_bs_c_4, 219 bs_notimpl_bs_c_8, 220 }; 221 222 /* bus space functions */ 223 224 void 225 isa_io_init(isa_io_addr, isa_mem_addr) 226 vaddr_t isa_io_addr; 227 vaddr_t isa_mem_addr; 228 { 229 isa_io_bs_tag.bs_cookie = (void *)isa_io_addr; 230 isa_mem_bs_tag.bs_cookie = (void *)isa_mem_addr; 231 } 232 233 /* 234 * break the abstraction: sometimes, other parts of the system 235 * (e.g. X servers) need to map ISA space directly. use these 236 * functions sparingly! 237 */ 238 vaddr_t 239 isa_io_data_vaddr(void) 240 { 241 return (vaddr_t)isa_io_bs_tag.bs_cookie; 242 } 243 244 vaddr_t 245 isa_mem_data_vaddr(void) 246 { 247 return (vaddr_t)isa_mem_bs_tag.bs_cookie; 248 } 249 250 int 251 isa_bs_map(t, bpa, size, cacheable, bshp) 252 void *t; 253 bus_addr_t bpa; 254 bus_size_t size; 255 int cacheable; 256 bus_space_handle_t *bshp; 257 { 258 *bshp = bpa + (bus_addr_t)t; 259 return(0); 260 } 261 262 void 263 isa_bs_unmap(t, bsh, size) 264 void *t; 265 bus_space_handle_t bsh; 266 bus_size_t size; 267 { 268 /* Nothing to do. */ 269 } 270 271 int 272 isa_bs_subregion(t, bsh, offset, size, nbshp) 273 void *t; 274 bus_space_handle_t bsh; 275 bus_size_t offset, size; 276 bus_space_handle_t *nbshp; 277 { 278 /* printf("isa_subregion(tag=%p, bsh=%lx, off=%lx, sz=%lx)\n", 279 t, bsh, offset, size);*/ 280 *nbshp = bsh + offset; 281 return(0); 282 } 283 284 int 285 isa_bs_alloc(t, rstart, rend, size, alignment, boundary, cacheable, 286 bpap, bshp) 287 void *t; 288 bus_addr_t rstart, rend; 289 bus_size_t size, alignment, boundary; 290 int cacheable; 291 bus_addr_t *bpap; 292 bus_space_handle_t *bshp; 293 { 294 panic("isa_alloc(): Help!"); 295 } 296 297 void 298 isa_bs_free(t, bsh, size) 299 void *t; 300 bus_space_handle_t bsh; 301 bus_size_t size; 302 { 303 panic("isa_free(): Help!"); 304 } 305 306 void * 307 isa_bs_vaddr(t, bsh) 308 void *t; 309 bus_space_handle_t bsh; 310 { 311 312 return ((void *)bsh); 313 } 314 315 void 316 isa_bs_barrier(t, bsh, offset, len, flags) 317 void *t; 318 bus_space_handle_t bsh; 319 bus_size_t offset, len; 320 int flags; 321 { 322 /* just return */ 323 } 324
Indexes created Fri Sep 26 20:09:58 GMT 2025