i80312_space.c revision 1.1
1 /* $NetBSD: i80312_space.c,v 1.1 2001/11/09 03:27:51 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 2001 Wasabi Systems, Inc. 5 * All rights reserved. 6 * 7 * Written by Jason R. Thorpe for Wasabi Systems, Inc. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed for the NetBSD Project by 20 * Wasabi Systems, Inc. 21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 22 * or promote products derived from this software without specific prior 23 * written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 * POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38 /* 39 * bus_space functions for i80312 Companion I/O chip. 40 */ 41 42 #include <sys/param.h> 43 #include <sys/systm.h> 44 45 #include <uvm/uvm_extern.h> 46 47 #include <machine/bus.h> 48 49 #include <arm/xscale/i80312var.h> 50 51 /* Prototypes for all the bus_space structure functions */ 52 bs_protos(i80312); 53 bs_protos(i80312_io); 54 bs_protos(i80312_mem); 55 bs_protos(bs_notimpl); 56 57 /* 58 * Template bus_space -- copied, and the bits that are NULL are 59 * filled in. 60 */ 61 const struct bus_space i80312_bs_tag_template = { 62 /* cookie */ 63 (void *) 0, 64 65 /* mapping/unmapping */ 66 NULL, 67 NULL, 68 i80312_bs_subregion, 69 70 /* allocation/deallocation */ 71 NULL, 72 NULL, 73 74 /* get kernel virtual address */ 75 i80312_bs_vaddr, 76 77 /* mmap */ 78 i80312_bs_mmap, 79 80 /* barrier */ 81 i80312_bs_barrier, 82 83 /* read (single) */ 84 i80312_bs_r_1, 85 i80312_bs_r_2, 86 i80312_bs_r_4, 87 bs_notimpl_bs_r_8, 88 89 /* read multiple */ 90 i80312_bs_rm_1, 91 i80312_bs_rm_2, 92 i80312_bs_rm_4, 93 bs_notimpl_bs_rm_8, 94 95 /* read region */ 96 bs_notimpl_bs_rr_1, 97 i80312_bs_rr_2, 98 i80312_bs_rr_4, 99 bs_notimpl_bs_rr_8, 100 101 /* write (single) */ 102 i80312_bs_w_1, 103 i80312_bs_w_2, 104 i80312_bs_w_4, 105 bs_notimpl_bs_w_8, 106 107 /* write multiple */ 108 i80312_bs_wm_1, 109 i80312_bs_wm_2, 110 i80312_bs_wm_4, 111 bs_notimpl_bs_wm_8, 112 113 /* write region */ 114 bs_notimpl_bs_wr_1, 115 i80312_bs_wr_2, 116 i80312_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 i80312_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 i80312_bs_c_2, 134 bs_notimpl_bs_c_4, 135 bs_notimpl_bs_c_8, 136 }; 137 138 void 139 i80312_bs_init(bus_space_tag_t bs, void *cookie) 140 { 141 142 *bs = i80312_bs_tag_template; 143 bs->bs_cookie = cookie; 144 } 145 146 void 147 i80312_io_bs_init(bus_space_tag_t bs, void *cookie) 148 { 149 150 *bs = i80312_bs_tag_template; 151 bs->bs_cookie = cookie; 152 153 bs->bs_map = i80312_io_bs_map; 154 bs->bs_unmap = i80312_io_bs_unmap; 155 bs->bs_alloc = i80312_io_bs_alloc; 156 bs->bs_free = i80312_io_bs_free; 157 158 bs->bs_vaddr = i80312_io_bs_vaddr; 159 } 160 161 void 162 i80312_mem_bs_init(bus_space_tag_t bs, void *cookie) 163 { 164 165 *bs = i80312_bs_tag_template; 166 bs->bs_cookie = cookie; 167 168 bs->bs_map = i80312_mem_bs_map; 169 bs->bs_unmap = i80312_mem_bs_unmap; 170 bs->bs_alloc = i80312_mem_bs_alloc; 171 bs->bs_free = i80312_mem_bs_free; 172 173 bs->bs_mmap = i80312_mem_bs_mmap; 174 } 175 176 /* *** Routines shared by i80312, PCI IO, and PCI MEM. *** */ 177 178 int 179 i80312_bs_subregion(void *t, bus_space_handle_t bsh, bus_size_t offset, 180 bus_size_t size, bus_space_handle_t *nbshp) 181 { 182 183 *nbshp = bsh + offset; 184 return (0); 185 } 186 187 void 188 i80312_bs_barrier(void *t, bus_space_handle_t bsh, bus_size_t offset, 189 bus_size_t len, int flags) 190 { 191 192 /* Nothing to do. */ 193 } 194 195 void * 196 i80312_bs_vaddr(void *t, bus_space_handle_t bsh) 197 { 198 199 return ((void *)bsh); 200 } 201 202 paddr_t 203 i80312_bs_mmap(void *t, bus_addr_t addr, off_t off, int prot, int flags) 204 { 205 206 /* Not supported. */ 207 return (-1); 208 } 209 210 /* *** Routines for PCI IO. *** */ 211 212 int 213 i80312_io_bs_map(void *t, bus_addr_t bpa, bus_size_t size, int flags, 214 bus_space_handle_t *bshp) 215 { 216 struct i80312_softc *sc = t; 217 vaddr_t winvaddr; 218 uint32_t busbase, bussize; 219 220 if (bpa >= sc->sc_pioout_base && 221 bpa < (sc->sc_pioout_base + sc->sc_pioout_size)) { 222 busbase = sc->sc_pioout_base; 223 bussize = sc->sc_pioout_size; 224 winvaddr = sc->sc_piow_vaddr; 225 } else if (bpa >= sc->sc_sioout_base && 226 bpa < (sc->sc_sioout_base + sc->sc_sioout_size)) { 227 busbase = sc->sc_sioout_base; 228 bussize = sc->sc_sioout_size; 229 winvaddr = sc->sc_siow_vaddr; 230 } else 231 return (EINVAL); 232 233 if ((bpa + size) >= (busbase + bussize)) 234 return (EINVAL); 235 236 /* 237 * Found the window -- PCI I/O space is mapped at a fixed 238 * virtual address by board-specific code. Translate the 239 * bus address to the virtual address. 240 */ 241 *bshp = winvaddr + (bpa - busbase); 242 243 return (0); 244 } 245 246 void 247 i80312_io_bs_unmap(void *t, bus_space_handle_t bsh, bus_size_t size) 248 { 249 250 /* Nothing to do. */ 251 } 252 253 int 254 i80312_io_bs_alloc(void *t, bus_addr_t rstart, bus_addr_t rend, 255 bus_size_t size, bus_size_t alignment, bus_size_t boundary, int flags, 256 bus_addr_t *bpap, bus_space_handle_t *bshp) 257 { 258 259 panic("i80312_io_bs_alloc(): not implemented\n"); 260 } 261 262 void 263 i80312_io_bs_free(void *t, bus_space_handle_t bsh, bus_size_t size) 264 { 265 266 panic("i80312_io_bs_free(): not implemented\n"); 267 } 268 269 void * 270 i80312_io_bs_vaddr(void *t, bus_space_handle_t bsh) 271 { 272 273 /* Not supported. */ 274 return (NULL); 275 } 276 277 /* *** Routines for PCI MEM. *** */ 278 279 int 280 i80312_mem_bs_map(void *t, bus_addr_t bpa, bus_size_t size, int flags, 281 bus_space_handle_t *bshp) 282 { 283 284 struct i80312_softc *sc = t; 285 vaddr_t va; 286 uint32_t busbase, bussize; 287 paddr_t pa, endpa; 288 289 if (bpa >= sc->sc_pmemout_base && 290 bpa < (sc->sc_pmemout_base + sc->sc_pmemout_size)) { 291 busbase = sc->sc_pmemout_base; 292 bussize = sc->sc_pmemout_size; 293 } else if (bpa >= sc->sc_smemout_base && 294 bpa < (sc->sc_smemout_base + sc->sc_smemout_size)) { 295 busbase = sc->sc_smemout_base; 296 bussize = sc->sc_smemout_size; 297 } else 298 return (EINVAL); 299 300 if ((bpa + size) >= (busbase + bussize)) 301 return (EINVAL); 302 303 /* 304 * Found the window -- PCI MEM space is not mapped by allocating 305 * some kernel VA space and mapping the pages with pmap_enter(). 306 * pmap_enter() will map unmanaged pages as non-cacheable. 307 */ 308 pa = trunc_page(bpa - busbase); 309 endpa = round_page((bpa - busbase) + size); 310 311 va = uvm_km_valloc(kernel_map, endpa - pa); 312 if (va == 0) 313 return (ENOMEM); 314 315 *bshp = va + (bpa & PAGE_MASK); 316 317 for (; pa < endpa; pa += PAGE_SIZE, va += PAGE_SIZE) { 318 pmap_enter(pmap_kernel(), va, pa, 319 VM_PROT_READ | VM_PROT_WRITE, PMAP_WIRED); 320 } 321 pmap_update(pmap_kernel()); 322 323 return (0); 324 } 325 326 void 327 i80312_mem_bs_unmap(void *t, bus_space_handle_t bsh, bus_size_t size) 328 { 329 vaddr_t va, endva; 330 331 va = trunc_page(bsh); 332 endva = round_page(bsh + size); 333 334 /* Free the kernel virtual mapping. */ 335 uvm_km_free(kernel_map, va, endva - va); 336 } 337 338 int 339 i80312_mem_bs_alloc(void *t, bus_addr_t rstart, bus_addr_t rend, 340 bus_size_t size, bus_size_t alignment, bus_size_t boundary, int flags, 341 bus_addr_t *bpap, bus_space_handle_t *bshp) 342 { 343 344 panic("i80312_mem_bs_alloc(): not implemented\n"); 345 } 346 347 void 348 i80312_mem_bs_free(void *t, bus_space_handle_t bsh, bus_size_t size) 349 { 350 351 panic("i80312_mem_bs_free(): not implemented\n"); 352 } 353 354 paddr_t 355 i80312_mem_bs_mmap(void *t, bus_addr_t addr, off_t off, int prot, int flags) 356 { 357 358 /* XXX */ 359 return (-1); 360 } 361
Indexes created Sat Sep 27 22:09:54 GMT 2025