1 /* $NetBSD: i80321_space.c,v 1.12 2010/02/24 19:12:12 skrll Exp $ */ 2 3 /* 4 * Copyright (c) 2001, 2002 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 i80321 I/O Processor. 40 */ 41 42 #include <sys/cdefs.h> 43 __KERNEL_RCSID(0, "$NetBSD: i80321_space.c,v 1.12 2010/02/24 19:12:12 skrll Exp $"); 44 45 #include <sys/param.h> 46 #include <sys/systm.h> 47 48 #include <uvm/uvm_extern.h> 49 50 #include <machine/bus.h> 51 52 #include <arm/xscale/i80321reg.h> 53 #include <arm/xscale/i80321var.h> 54 55 #include "opt_i80321.h" 56 57 /* Prototypes for all the bus_space structure functions */ 58 bs_protos(i80321); 59 bs_protos(i80321_io); 60 bs_protos(i80321_mem); 61 bs_protos(generic); 62 bs_protos(generic_armv4); 63 bs_protos(bs_notimpl); 64 65 /* 66 * Template bus_space -- copied, and the bits that are NULL are 67 * filled in. 68 */ 69 const struct bus_space i80321_bs_tag_template = { 70 /* cookie */ 71 (void *) 0, 72 73 /* mapping/unmapping */ 74 NULL, 75 NULL, 76 i80321_bs_subregion, 77 78 /* allocation/deallocation */ 79 NULL, 80 NULL, 81 82 /* get kernel virtual address */ 83 i80321_bs_vaddr, 84 85 /* mmap */ 86 i80321_bs_mmap, 87 88 /* barrier */ 89 i80321_bs_barrier, 90 91 /* read (single) */ 92 generic_bs_r_1, 93 generic_armv4_bs_r_2, 94 generic_bs_r_4, 95 bs_notimpl_bs_r_8, 96 97 /* read multiple */ 98 generic_bs_rm_1, 99 generic_armv4_bs_rm_2, 100 generic_bs_rm_4, 101 bs_notimpl_bs_rm_8, 102 103 /* read region */ 104 generic_bs_rr_1, 105 generic_armv4_bs_rr_2, 106 generic_bs_rr_4, 107 bs_notimpl_bs_rr_8, 108 109 /* write (single) */ 110 generic_bs_w_1, 111 generic_armv4_bs_w_2, 112 generic_bs_w_4, 113 bs_notimpl_bs_w_8, 114 115 /* write multiple */ 116 generic_bs_wm_1, 117 generic_armv4_bs_wm_2, 118 generic_bs_wm_4, 119 bs_notimpl_bs_wm_8, 120 121 /* write region */ 122 generic_bs_wr_1, 123 generic_armv4_bs_wr_2, 124 generic_bs_wr_4, 125 bs_notimpl_bs_wr_8, 126 127 /* set multiple */ 128 bs_notimpl_bs_sm_1, 129 bs_notimpl_bs_sm_2, 130 bs_notimpl_bs_sm_4, 131 bs_notimpl_bs_sm_8, 132 133 /* set region */ 134 bs_notimpl_bs_sr_1, 135 generic_armv4_bs_sr_2, 136 generic_bs_sr_4, 137 bs_notimpl_bs_sr_8, 138 139 /* copy */ 140 bs_notimpl_bs_c_1, 141 generic_armv4_bs_c_2, 142 bs_notimpl_bs_c_4, 143 bs_notimpl_bs_c_8, 144 }; 145 146 void 147 i80321_bs_init(bus_space_tag_t bs, void *cookie) 148 { 149 150 *bs = i80321_bs_tag_template; 151 bs->bs_cookie = cookie; 152 } 153 154 void 155 i80321_io_bs_init(bus_space_tag_t bs, void *cookie) 156 { 157 158 *bs = i80321_bs_tag_template; 159 bs->bs_cookie = cookie; 160 161 bs->bs_map = i80321_io_bs_map; 162 bs->bs_unmap = i80321_io_bs_unmap; 163 bs->bs_alloc = i80321_io_bs_alloc; 164 bs->bs_free = i80321_io_bs_free; 165 166 bs->bs_vaddr = i80321_io_bs_vaddr; 167 } 168 169 void 170 i80321_mem_bs_init(bus_space_tag_t bs, void *cookie) 171 { 172 173 *bs = i80321_bs_tag_template; 174 bs->bs_cookie = cookie; 175 176 bs->bs_map = i80321_mem_bs_map; 177 bs->bs_unmap = i80321_mem_bs_unmap; 178 bs->bs_alloc = i80321_mem_bs_alloc; 179 bs->bs_free = i80321_mem_bs_free; 180 181 bs->bs_mmap = i80321_mem_bs_mmap; 182 } 183 184 /* *** Routines shared by i80321, PCI IO, and PCI MEM. *** */ 185 186 int 187 i80321_bs_subregion(void *t, bus_space_handle_t bsh, bus_size_t offset, 188 bus_size_t size, bus_space_handle_t *nbshp) 189 { 190 191 *nbshp = bsh + offset; 192 return (0); 193 } 194 195 void 196 i80321_bs_barrier(void *t, bus_space_handle_t bsh, bus_size_t offset, 197 bus_size_t len, int flags) 198 { 199 200 /* Nothing to do. */ 201 } 202 203 void * 204 i80321_bs_vaddr(void *t, bus_space_handle_t bsh) 205 { 206 207 return ((void *)bsh); 208 } 209 210 paddr_t 211 i80321_bs_mmap(void *t, bus_addr_t addr, off_t off, int prot, int flags) 212 { 213 214 /* Not supported. */ 215 return (-1); 216 } 217 218 /* *** Routines for PCI IO. *** */ 219 220 int 221 i80321_io_bs_map(void *t, bus_addr_t bpa, bus_size_t size, int flags, 222 bus_space_handle_t *bshp) 223 { 224 struct i80321_softc *sc = t; 225 vaddr_t winvaddr; 226 uint32_t busbase; 227 228 if (bpa >= sc->sc_ioout_xlate && 229 bpa < (sc->sc_ioout_xlate + VERDE_OUT_XLATE_IO_WIN_SIZE)) { 230 busbase = sc->sc_ioout_xlate; 231 winvaddr = sc->sc_iow_vaddr; 232 } else 233 return (EINVAL); 234 235 if ((bpa + size) >= (busbase + VERDE_OUT_XLATE_IO_WIN_SIZE)) 236 return (EINVAL); 237 238 /* 239 * Found the window -- PCI I/O space is mapped at a fixed 240 * virtual address by board-specific code. Translate the 241 * bus address to the virtual address. 242 */ 243 *bshp = winvaddr + (bpa - busbase); 244 245 return (0); 246 } 247 248 void 249 i80321_io_bs_unmap(void *t, bus_space_handle_t bsh, bus_size_t size) 250 { 251 252 /* Nothing to do. */ 253 } 254 255 int 256 i80321_io_bs_alloc(void *t, bus_addr_t rstart, bus_addr_t rend, 257 bus_size_t size, bus_size_t alignment, bus_size_t boundary, int flags, 258 bus_addr_t *bpap, bus_space_handle_t *bshp) 259 { 260 261 panic("i80321_io_bs_alloc(): not implemented"); 262 } 263 264 void 265 i80321_io_bs_free(void *t, bus_space_handle_t bsh, bus_size_t size) 266 { 267 268 panic("i80321_io_bs_free(): not implemented"); 269 } 270 271 void * 272 i80321_io_bs_vaddr(void *t, bus_space_handle_t bsh) 273 { 274 275 /* Not supported. */ 276 return (NULL); 277 } 278 279 /* *** Routines for PCI MEM. *** */ 280 281 int 282 i80321_mem_bs_map(void *t, bus_addr_t bpa, bus_size_t size, int flags, 283 bus_space_handle_t *bshp) 284 { 285 286 #ifndef I80321_USE_DIRECT_WIN 287 struct i80321_softc *sc = t; 288 #endif 289 vaddr_t va; 290 uint32_t busbase; 291 paddr_t pa, endpa, physbase; 292 293 #ifdef I80321_USE_DIRECT_WIN 294 if (bpa >= (VERDE_OUT_DIRECT_WIN_BASE) && 295 bpa < (VERDE_OUT_DIRECT_WIN_BASE + VERDE_OUT_DIRECT_WIN_SIZE)) { 296 busbase = VERDE_OUT_DIRECT_WIN_BASE; 297 physbase = VERDE_OUT_DIRECT_WIN_BASE; 298 } else 299 return (EINVAL); 300 if ((bpa + size) >= (VERDE_OUT_DIRECT_WIN_BASE + 301 VERDE_OUT_DIRECT_WIN_SIZE)) 302 return (EINVAL); 303 #else 304 if (bpa >= sc->sc_owin[0].owin_xlate_lo && 305 bpa < (sc->sc_owin[0].owin_xlate_lo + 306 VERDE_OUT_XLATE_MEM_WIN_SIZE)) { 307 busbase = sc->sc_owin[0].owin_xlate_lo; 308 physbase = sc->sc_iwin[1].iwin_xlate; 309 } else 310 return (EINVAL); 311 312 if ((bpa + size) >= (busbase + VERDE_OUT_XLATE_MEM_WIN_SIZE)) 313 return (EINVAL); 314 #endif 315 316 /* 317 * Found the window -- PCI MEM space is now mapped by allocating 318 * some kernel VA space and mapping the pages with pmap_enter(). 319 * pmap_enter() will map unmanaged pages as non-cacheable. 320 */ 321 pa = trunc_page((bpa - busbase) + physbase); 322 endpa = round_page(((bpa - busbase) + physbase) + size); 323 324 va = uvm_km_alloc(kernel_map, endpa - pa, 0, 325 UVM_KMF_VAONLY | UVM_KMF_NOWAIT); 326 if (va == 0) 327 return (ENOMEM); 328 329 *bshp = va + (bpa & PAGE_MASK); 330 331 for (; pa < endpa; pa += PAGE_SIZE, va += PAGE_SIZE) { 332 pmap_enter(pmap_kernel(), va, pa, 333 VM_PROT_READ | VM_PROT_WRITE, 334 VM_PROT_READ | VM_PROT_WRITE | PMAP_WIRED); 335 } 336 pmap_update(pmap_kernel()); 337 338 return (0); 339 } 340 341 void 342 i80321_mem_bs_unmap(void *t, bus_space_handle_t bsh, bus_size_t size) 343 { 344 vaddr_t va, endva; 345 346 va = trunc_page(bsh); 347 endva = round_page(bsh + size); 348 349 pmap_remove(pmap_kernel(), va, endva - va); 350 pmap_update(pmap_kernel()); 351 352 /* Free the kernel virtual mapping. */ 353 uvm_km_free(kernel_map, va, endva - va, UVM_KMF_VAONLY); 354 } 355 356 int 357 i80321_mem_bs_alloc(void *t, bus_addr_t rstart, bus_addr_t rend, 358 bus_size_t size, bus_size_t alignment, bus_size_t boundary, int flags, 359 bus_addr_t *bpap, bus_space_handle_t *bshp) 360 { 361 362 panic("i80321_mem_bs_alloc(): not implemented"); 363 } 364 365 void 366 i80321_mem_bs_free(void *t, bus_space_handle_t bsh, bus_size_t size) 367 { 368 369 panic("i80321_mem_bs_free(): not implemented"); 370 } 371 372 paddr_t 373 i80321_mem_bs_mmap(void *t, bus_addr_t addr, off_t off, int prot, int flags) 374 { 375 376 /* XXX */ 377 return (-1); 378 } 379