i80312_space.c revision 1.2
1 /* $NetBSD: i80312_space.c,v 1.2 2001/11/28 21:08:47 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/i80312reg.h> 50 #include <arm/xscale/i80312var.h> 51 52 /* Prototypes for all the bus_space structure functions */ 53 bs_protos(i80312); 54 bs_protos(i80312_io); 55 bs_protos(i80312_mem); 56 bs_protos(bs_notimpl); 57 58 /* 59 * Template bus_space -- copied, and the bits that are NULL are 60 * filled in. 61 */ 62 const struct bus_space i80312_bs_tag_template = { 63 /* cookie */ 64 (void *) 0, 65 66 /* mapping/unmapping */ 67 NULL, 68 NULL, 69 i80312_bs_subregion, 70 71 /* allocation/deallocation */ 72 NULL, 73 NULL, 74 75 /* get kernel virtual address */ 76 i80312_bs_vaddr, 77 78 /* mmap */ 79 i80312_bs_mmap, 80 81 /* barrier */ 82 i80312_bs_barrier, 83 84 /* read (single) */ 85 i80312_bs_r_1, 86 i80312_bs_r_2, 87 i80312_bs_r_4, 88 bs_notimpl_bs_r_8, 89 90 /* read multiple */ 91 i80312_bs_rm_1, 92 i80312_bs_rm_2, 93 i80312_bs_rm_4, 94 bs_notimpl_bs_rm_8, 95 96 /* read region */ 97 bs_notimpl_bs_rr_1, 98 i80312_bs_rr_2, 99 i80312_bs_rr_4, 100 bs_notimpl_bs_rr_8, 101 102 /* write (single) */ 103 i80312_bs_w_1, 104 i80312_bs_w_2, 105 i80312_bs_w_4, 106 bs_notimpl_bs_w_8, 107 108 /* write multiple */ 109 i80312_bs_wm_1, 110 i80312_bs_wm_2, 111 i80312_bs_wm_4, 112 bs_notimpl_bs_wm_8, 113 114 /* write region */ 115 bs_notimpl_bs_wr_1, 116 i80312_bs_wr_2, 117 i80312_bs_wr_4, 118 bs_notimpl_bs_wr_8, 119 120 /* set multiple */ 121 bs_notimpl_bs_sm_1, 122 bs_notimpl_bs_sm_2, 123 bs_notimpl_bs_sm_4, 124 bs_notimpl_bs_sm_8, 125 126 /* set region */ 127 bs_notimpl_bs_sr_1, 128 i80312_bs_sr_2, 129 bs_notimpl_bs_sr_4, 130 bs_notimpl_bs_sr_8, 131 132 /* copy */ 133 bs_notimpl_bs_c_1, 134 i80312_bs_c_2, 135 bs_notimpl_bs_c_4, 136 bs_notimpl_bs_c_8, 137 }; 138 139 void 140 i80312_bs_init(bus_space_tag_t bs, void *cookie) 141 { 142 143 *bs = i80312_bs_tag_template; 144 bs->bs_cookie = cookie; 145 } 146 147 void 148 i80312_io_bs_init(bus_space_tag_t bs, void *cookie) 149 { 150 151 *bs = i80312_bs_tag_template; 152 bs->bs_cookie = cookie; 153 154 bs->bs_map = i80312_io_bs_map; 155 bs->bs_unmap = i80312_io_bs_unmap; 156 bs->bs_alloc = i80312_io_bs_alloc; 157 bs->bs_free = i80312_io_bs_free; 158 159 bs->bs_vaddr = i80312_io_bs_vaddr; 160 } 161 162 void 163 i80312_mem_bs_init(bus_space_tag_t bs, void *cookie) 164 { 165 166 *bs = i80312_bs_tag_template; 167 bs->bs_cookie = cookie; 168 169 bs->bs_map = i80312_mem_bs_map; 170 bs->bs_unmap = i80312_mem_bs_unmap; 171 bs->bs_alloc = i80312_mem_bs_alloc; 172 bs->bs_free = i80312_mem_bs_free; 173 174 bs->bs_mmap = i80312_mem_bs_mmap; 175 } 176 177 /* *** Routines shared by i80312, PCI IO, and PCI MEM. *** */ 178 179 int 180 i80312_bs_subregion(void *t, bus_space_handle_t bsh, bus_size_t offset, 181 bus_size_t size, bus_space_handle_t *nbshp) 182 { 183 184 *nbshp = bsh + offset; 185 return (0); 186 } 187 188 void 189 i80312_bs_barrier(void *t, bus_space_handle_t bsh, bus_size_t offset, 190 bus_size_t len, int flags) 191 { 192 193 /* Nothing to do. */ 194 } 195 196 void * 197 i80312_bs_vaddr(void *t, bus_space_handle_t bsh) 198 { 199 200 return ((void *)bsh); 201 } 202 203 paddr_t 204 i80312_bs_mmap(void *t, bus_addr_t addr, off_t off, int prot, int flags) 205 { 206 207 /* Not supported. */ 208 return (-1); 209 } 210 211 /* *** Routines for PCI IO. *** */ 212 213 int 214 i80312_io_bs_map(void *t, bus_addr_t bpa, bus_size_t size, int flags, 215 bus_space_handle_t *bshp) 216 { 217 struct i80312_softc *sc = t; 218 vaddr_t winvaddr; 219 uint32_t busbase, bussize; 220 221 if (bpa >= sc->sc_pioout_base && 222 bpa < (sc->sc_pioout_base + sc->sc_pioout_size)) { 223 busbase = sc->sc_pioout_base; 224 bussize = sc->sc_pioout_size; 225 winvaddr = sc->sc_piow_vaddr; 226 } else if (bpa >= sc->sc_sioout_base && 227 bpa < (sc->sc_sioout_base + sc->sc_sioout_size)) { 228 busbase = sc->sc_sioout_base; 229 bussize = sc->sc_sioout_size; 230 winvaddr = sc->sc_siow_vaddr; 231 } else 232 return (EINVAL); 233 234 if ((bpa + size) >= (busbase + bussize)) 235 return (EINVAL); 236 237 /* 238 * Found the window -- PCI I/O space is mapped at a fixed 239 * virtual address by board-specific code. Translate the 240 * bus address to the virtual address. 241 */ 242 *bshp = winvaddr + (bpa - busbase); 243 244 return (0); 245 } 246 247 void 248 i80312_io_bs_unmap(void *t, bus_space_handle_t bsh, bus_size_t size) 249 { 250 251 /* Nothing to do. */ 252 } 253 254 int 255 i80312_io_bs_alloc(void *t, bus_addr_t rstart, bus_addr_t rend, 256 bus_size_t size, bus_size_t alignment, bus_size_t boundary, int flags, 257 bus_addr_t *bpap, bus_space_handle_t *bshp) 258 { 259 260 panic("i80312_io_bs_alloc(): not implemented\n"); 261 } 262 263 void 264 i80312_io_bs_free(void *t, bus_space_handle_t bsh, bus_size_t size) 265 { 266 267 panic("i80312_io_bs_free(): not implemented\n"); 268 } 269 270 void * 271 i80312_io_bs_vaddr(void *t, bus_space_handle_t bsh) 272 { 273 274 /* Not supported. */ 275 return (NULL); 276 } 277 278 /* *** Routines for PCI MEM. *** */ 279 280 int 281 i80312_mem_bs_map(void *t, bus_addr_t bpa, bus_size_t size, int flags, 282 bus_space_handle_t *bshp) 283 { 284 285 struct i80312_softc *sc = t; 286 vaddr_t va; 287 uint32_t busbase, bussize; 288 paddr_t pa, endpa, physbase; 289 290 if (bpa >= sc->sc_pmemout_base && 291 bpa < (sc->sc_pmemout_base + sc->sc_pmemout_size)) { 292 busbase = sc->sc_pmemout_base; 293 bussize = sc->sc_pmemout_size; 294 physbase = I80312_PCI_XLATE_PMW_BASE; 295 } else if (bpa >= sc->sc_smemout_base && 296 bpa < (sc->sc_smemout_base + sc->sc_smemout_size)) { 297 busbase = sc->sc_smemout_base; 298 bussize = sc->sc_smemout_size; 299 physbase = I80312_PCI_XLATE_SMW_BASE; 300 } else 301 return (EINVAL); 302 303 if ((bpa + size) >= (busbase + bussize)) 304 return (EINVAL); 305 306 /* 307 * Found the window -- PCI MEM space is not mapped by allocating 308 * some kernel VA space and mapping the pages with pmap_enter(). 309 * pmap_enter() will map unmanaged pages as non-cacheable. 310 */ 311 pa = trunc_page((bpa - busbase) + physbase); 312 endpa = round_page(((bpa - busbase) + physbase) + size); 313 314 va = uvm_km_valloc(kernel_map, endpa - pa); 315 if (va == 0) 316 return (ENOMEM); 317 318 *bshp = va + (bpa & PAGE_MASK); 319 320 for (; pa < endpa; pa += PAGE_SIZE, va += PAGE_SIZE) { 321 pmap_enter(pmap_kernel(), va, pa, 322 VM_PROT_READ | VM_PROT_WRITE, PMAP_WIRED); 323 } 324 pmap_update(pmap_kernel()); 325 326 return (0); 327 } 328 329 void 330 i80312_mem_bs_unmap(void *t, bus_space_handle_t bsh, bus_size_t size) 331 { 332 vaddr_t va, endva; 333 334 va = trunc_page(bsh); 335 endva = round_page(bsh + size); 336 337 /* Free the kernel virtual mapping. */ 338 uvm_km_free(kernel_map, va, endva - va); 339 } 340 341 int 342 i80312_mem_bs_alloc(void *t, bus_addr_t rstart, bus_addr_t rend, 343 bus_size_t size, bus_size_t alignment, bus_size_t boundary, int flags, 344 bus_addr_t *bpap, bus_space_handle_t *bshp) 345 { 346 347 panic("i80312_mem_bs_alloc(): not implemented\n"); 348 } 349 350 void 351 i80312_mem_bs_free(void *t, bus_space_handle_t bsh, bus_size_t size) 352 { 353 354 panic("i80312_mem_bs_free(): not implemented\n"); 355 } 356 357 paddr_t 358 i80312_mem_bs_mmap(void *t, bus_addr_t addr, off_t off, int prot, int flags) 359 { 360 361 /* XXX */ 362 return (-1); 363 } 364
Indexes created Fri Sep 26 20:09:58 GMT 2025