1 /* $NetBSD: isa_io.c,v 1.1 2002/02/10 12:26:01 chris 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/param.h> 41 #include <sys/systm.h> 42 #include <machine/bus.h> 43 #include <machine/pio.h> 44 #include <machine/isa_machdep.h> 45 46 /* Proto types for all the bus_space structure functions */ 47 48 bs_protos(isa); 49 bs_protos(bs_notimpl); 50 51 /* 52 * Declare the isa bus space tags 53 * The IO and MEM structs are identical, except for the cookies, 54 * which contain the address space bases. 55 */ 56 57 /* 58 * NOTE: ASSEMBLY LANGUAGE RELIES ON THE COOKIE -- THE FIRST MEMBER OF 59 * THIS STRUCTURE -- TO BE THE VIRTUAL ADDRESS OF ISA/IO! 60 */ 61 struct bus_space isa_io_bs_tag = { 62 /* cookie */ 63 NULL, /* initialized below */ 64 65 /* mapping/unmapping */ 66 isa_bs_map, 67 isa_bs_unmap, 68 isa_bs_subregion, 69 70 /* allocation/deallocation */ 71 isa_bs_alloc, 72 isa_bs_free, 73 74 /* get kernel virtual address */ 75 isa_bs_vaddr, 76 77 /* mmap bus space for userland */ 78 bs_notimpl_bs_mmap, /* XXX possible even? XXX */ 79 80 /* barrier */ 81 isa_bs_barrier, 82 83 /* read (single) */ 84 isa_bs_r_1, 85 isa_bs_r_2, 86 isa_bs_r_4, 87 bs_notimpl_bs_r_8, 88 89 /* read multiple */ 90 isa_bs_rm_1, 91 isa_bs_rm_2, 92 isa_bs_rm_4, 93 bs_notimpl_bs_rm_8, 94 95 /* read region */ 96 isa_bs_rr_1, 97 isa_bs_rr_2, 98 isa_bs_rr_4, 99 bs_notimpl_bs_rr_8, 100 101 /* write (single) */ 102 isa_bs_w_1, 103 isa_bs_w_2, 104 isa_bs_w_4, 105 bs_notimpl_bs_w_8, 106 107 /* write multiple */ 108 isa_bs_wm_1, 109 isa_bs_wm_2, 110 isa_bs_wm_4, 111 bs_notimpl_bs_wm_8, 112 113 /* write region */ 114 isa_bs_wr_1, 115 isa_bs_wr_2, 116 isa_bs_wr_4, 117 bs_notimpl_bs_wr_8, 118 119 /* set multiple */ 120 bs_notimpl_bs_sm_1, 121 bs_notimpl_bs_sm_2, 122 bs_notimpl_bs_sm_4, 123 bs_notimpl_bs_sm_8, 124 125 /* set region */ 126 bs_notimpl_bs_sr_1, 127 isa_bs_sr_2, 128 bs_notimpl_bs_sr_4, 129 bs_notimpl_bs_sr_8, 130 131 /* copy */ 132 bs_notimpl_bs_c_1, 133 bs_notimpl_bs_c_2, 134 bs_notimpl_bs_c_4, 135 bs_notimpl_bs_c_8, 136 }; 137 138 /* 139 * NOTE: ASSEMBLY LANGUAGE RELIES ON THE COOKIE -- THE FIRST MEMBER OF 140 * THIS STRUCTURE -- TO BE THE VIRTUAL ADDRESS OF ISA/MEMORY! 141 */ 142 struct bus_space isa_mem_bs_tag = { 143 /* cookie */ 144 NULL, /* initialized below */ 145 146 /* mapping/unmapping */ 147 isa_bs_map, 148 isa_bs_unmap, 149 isa_bs_subregion, 150 151 /* allocation/deallocation */ 152 isa_bs_alloc, 153 isa_bs_free, 154 155 /* get kernel virtual address */ 156 isa_bs_vaddr, 157 158 /* mmap bus space for userland */ 159 bs_notimpl_bs_mmap, /* XXX open for now ... XXX */ 160 161 /* barrier */ 162 isa_bs_barrier, 163 164 /* read (single) */ 165 isa_bs_r_1, 166 isa_bs_r_2, 167 isa_bs_r_4, 168 bs_notimpl_bs_r_8, 169 170 /* read multiple */ 171 isa_bs_rm_1, 172 isa_bs_rm_2, 173 isa_bs_rm_4, 174 bs_notimpl_bs_rm_8, 175 176 /* read region */ 177 isa_bs_rr_1, 178 isa_bs_rr_2, 179 isa_bs_rr_4, 180 bs_notimpl_bs_rr_8, 181 182 /* write (single) */ 183 isa_bs_w_1, 184 isa_bs_w_2, 185 isa_bs_w_4, 186 bs_notimpl_bs_w_8, 187 188 /* write multiple */ 189 isa_bs_wm_1, 190 isa_bs_wm_2, 191 isa_bs_wm_4, 192 bs_notimpl_bs_wm_8, 193 194 /* write region */ 195 isa_bs_wr_1, 196 isa_bs_wr_2, 197 isa_bs_wr_4, 198 bs_notimpl_bs_wr_8, 199 200 /* set multiple */ 201 bs_notimpl_bs_sm_1, 202 bs_notimpl_bs_sm_2, 203 bs_notimpl_bs_sm_4, 204 bs_notimpl_bs_sm_8, 205 206 /* set region */ 207 bs_notimpl_bs_sr_1, 208 isa_bs_sr_2, 209 bs_notimpl_bs_sr_4, 210 bs_notimpl_bs_sr_8, 211 212 /* copy */ 213 bs_notimpl_bs_c_1, 214 bs_notimpl_bs_c_2, 215 bs_notimpl_bs_c_4, 216 bs_notimpl_bs_c_8, 217 }; 218 219 /* bus space functions */ 220 221 void 222 isa_io_init(isa_io_addr, isa_mem_addr) 223 vm_offset_t isa_io_addr; 224 vm_offset_t isa_mem_addr; 225 { 226 isa_io_bs_tag.bs_cookie = (void *)isa_io_addr; 227 isa_mem_bs_tag.bs_cookie = (void *)isa_mem_addr; 228 } 229 230 /* 231 * break the abstraction: sometimes, other parts of the system 232 * (e.g. X servers) need to map ISA space directly. use these 233 * functions sparingly! 234 */ 235 vm_offset_t 236 isa_io_data_vaddr(void) 237 { 238 return (vm_offset_t)isa_io_bs_tag.bs_cookie; 239 } 240 241 vm_offset_t 242 isa_mem_data_vaddr(void) 243 { 244 return (vm_offset_t)isa_mem_bs_tag.bs_cookie; 245 } 246 247 int 248 isa_bs_map(t, bpa, size, cacheable, bshp) 249 void *t; 250 bus_addr_t bpa; 251 bus_size_t size; 252 int cacheable; 253 bus_space_handle_t *bshp; 254 { 255 *bshp = bpa + (bus_addr_t)t; 256 return(0); 257 } 258 259 void 260 isa_bs_unmap(t, bsh, size) 261 void *t; 262 bus_space_handle_t bsh; 263 bus_size_t size; 264 { 265 /* Nothing to do. */ 266 } 267 268 int 269 isa_bs_subregion(t, bsh, offset, size, nbshp) 270 void *t; 271 bus_space_handle_t bsh; 272 bus_size_t offset, size; 273 bus_space_handle_t *nbshp; 274 { 275 /* printf("isa_subregion(tag=%p, bsh=%lx, off=%lx, sz=%lx)\n", 276 t, bsh, offset, size);*/ 277 *nbshp = bsh + offset; 278 return(0); 279 } 280 281 int 282 isa_bs_alloc(t, rstart, rend, size, alignment, boundary, cacheable, 283 bpap, bshp) 284 void *t; 285 bus_addr_t rstart, rend; 286 bus_size_t size, alignment, boundary; 287 int cacheable; 288 bus_addr_t *bpap; 289 bus_space_handle_t *bshp; 290 { 291 panic("isa_alloc(): Help!\n"); 292 } 293 294 void 295 isa_bs_free(t, bsh, size) 296 void *t; 297 bus_space_handle_t bsh; 298 bus_size_t size; 299 { 300 panic("isa_free(): Help!\n"); 301 } 302 303 void * 304 isa_bs_vaddr(t, bsh) 305 void *t; 306 bus_space_handle_t bsh; 307 { 308 309 return ((void *)bsh); 310 } 311 312 void 313 isa_bs_barrier(t, bsh, offset, len, flags) 314 void *t; 315 bus_space_handle_t bsh; 316 bus_size_t offset, len; 317 int flags; 318 { 319 /* just return */ 320 } 321