1/* $NetBSD: i80312_space.c,v 1.10 2010/02/24 19:12:12 skrll 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/cdefs.h> 43__KERNEL_RCSID(0, "$NetBSD: i80312_space.c,v 1.10 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 <sys/bus.h> 51 52#include <arm/xscale/i80312reg.h> 53#include <arm/xscale/i80312var.h> 54 55/* Prototypes for all the bus_space structure functions */ 56bs_protos(i80312); 57bs_protos(i80312_io); 58bs_protos(i80312_mem); 59bs_protos(generic); 60bs_protos(generic_armv4); 61bs_protos(bs_notimpl); 62 63/* 64 * Template bus_space -- copied, and the bits that are NULL are 65 * filled in. 66 */ 67const struct bus_space i80312_bs_tag_template = { 68 /* cookie */ 69 (void *) 0, 70 71 /* mapping/unmapping */ 72 NULL, 73 NULL, 74 i80312_bs_subregion, 75 76 /* allocation/deallocation */ 77 NULL, 78 NULL, 79 80 /* get kernel virtual address */ 81 i80312_bs_vaddr, 82 83 /* mmap */ 84 i80312_bs_mmap, 85 86 /* barrier */ 87 i80312_bs_barrier, 88 89 /* read (single) */ 90 generic_bs_r_1, 91 generic_armv4_bs_r_2, 92 generic_bs_r_4, 93 bs_notimpl_bs_r_8, 94 95 /* read multiple */ 96 generic_bs_rm_1, 97 generic_armv4_bs_rm_2, 98 generic_bs_rm_4, 99 bs_notimpl_bs_rm_8, 100 101 /* read region */ 102 bs_notimpl_bs_rr_1, 103 generic_armv4_bs_rr_2, 104 generic_bs_rr_4, 105 bs_notimpl_bs_rr_8, 106 107 /* write (single) */ 108 generic_bs_w_1, 109 generic_armv4_bs_w_2, 110 generic_bs_w_4, 111 bs_notimpl_bs_w_8, 112 113 /* write multiple */ 114 generic_bs_wm_1, 115 generic_armv4_bs_wm_2, 116 generic_bs_wm_4, 117 bs_notimpl_bs_wm_8, 118 119 /* write region */ 120 bs_notimpl_bs_wr_1, 121 generic_armv4_bs_wr_2, 122 generic_bs_wr_4, 123 bs_notimpl_bs_wr_8, 124 125 /* set multiple */ 126 bs_notimpl_bs_sm_1, 127 bs_notimpl_bs_sm_2, 128 bs_notimpl_bs_sm_4, 129 bs_notimpl_bs_sm_8, 130 131 /* set region */ 132 bs_notimpl_bs_sr_1, 133 generic_armv4_bs_sr_2, 134 generic_bs_sr_4, 135 bs_notimpl_bs_sr_8, 136 137 /* copy */ 138 bs_notimpl_bs_c_1, 139 generic_armv4_bs_c_2, 140 bs_notimpl_bs_c_4, 141 bs_notimpl_bs_c_8, 142}; 143 144void 145i80312_bs_init(bus_space_tag_t bs, void *cookie) 146{ 147 148 *bs = i80312_bs_tag_template; 149 bs->bs_cookie = cookie; 150} 151 152void 153i80312_io_bs_init(bus_space_tag_t bs, void *cookie) 154{ 155 156 *bs = i80312_bs_tag_template; 157 bs->bs_cookie = cookie; 158 159 bs->bs_map = i80312_io_bs_map; 160 bs->bs_unmap = i80312_io_bs_unmap; 161 bs->bs_alloc = i80312_io_bs_alloc; 162 bs->bs_free = i80312_io_bs_free; 163 164 bs->bs_vaddr = i80312_io_bs_vaddr; 165} 166 167void 168i80312_mem_bs_init(bus_space_tag_t bs, void *cookie) 169{ 170 171 *bs = i80312_bs_tag_template; 172 bs->bs_cookie = cookie; 173 174 bs->bs_map = i80312_mem_bs_map; 175 bs->bs_unmap = i80312_mem_bs_unmap; 176 bs->bs_alloc = i80312_mem_bs_alloc; 177 bs->bs_free = i80312_mem_bs_free; 178 179 bs->bs_mmap = i80312_mem_bs_mmap; 180} 181 182/* *** Routines shared by i80312, PCI IO, and PCI MEM. *** */ 183 184int 185i80312_bs_subregion(void *t, bus_space_handle_t bsh, bus_size_t offset, 186 bus_size_t size, bus_space_handle_t *nbshp) 187{ 188 189 *nbshp = bsh + offset; 190 return (0); 191} 192 193void 194i80312_bs_barrier(void *t, bus_space_handle_t bsh, bus_size_t offset, 195 bus_size_t len, int flags) 196{ 197 198 /* Nothing to do. */ 199} 200 201void * 202i80312_bs_vaddr(void *t, bus_space_handle_t bsh) 203{ 204 205 return ((void *)bsh); 206} 207 208paddr_t 209i80312_bs_mmap(void *t, bus_addr_t addr, off_t off, int prot, int flags) 210{ 211 212 /* Not supported. */ 213 return (-1); 214} 215 216/* *** Routines for PCI IO. *** */ 217 218int 219i80312_io_bs_map(void *t, bus_addr_t bpa, bus_size_t size, int flags, 220 bus_space_handle_t *bshp) 221{ 222 struct i80312_softc *sc = t; 223 vaddr_t winvaddr; 224 uint32_t busbase, bussize; 225 226 if (bpa >= sc->sc_pioout_base && 227 bpa < (sc->sc_pioout_base + sc->sc_pioout_size)) { 228 busbase = sc->sc_pioout_base; 229 bussize = sc->sc_pioout_size; 230 winvaddr = sc->sc_piow_vaddr; 231 } else if (bpa >= sc->sc_sioout_base && 232 bpa < (sc->sc_sioout_base + sc->sc_sioout_size)) { 233 busbase = sc->sc_sioout_base; 234 bussize = sc->sc_sioout_size; 235 winvaddr = sc->sc_siow_vaddr; 236 } else 237 return (EINVAL); 238 239 if ((bpa + size) >= (busbase + bussize)) 240 return (EINVAL); 241 242 /* 243 * Found the window -- PCI I/O space is mapped at a fixed 244 * virtual address by board-specific code. Translate the 245 * bus address to the virtual address. 246 */ 247 *bshp = winvaddr + (bpa - busbase); 248 249 return (0); 250} 251 252void 253i80312_io_bs_unmap(void *t, bus_space_handle_t bsh, bus_size_t size) 254{ 255 256 /* Nothing to do. */ 257} 258 259int 260i80312_io_bs_alloc(void *t, bus_addr_t rstart, bus_addr_t rend, 261 bus_size_t size, bus_size_t alignment, bus_size_t boundary, int flags, 262 bus_addr_t *bpap, bus_space_handle_t *bshp) 263{ 264 265 panic("i80312_io_bs_alloc(): not implemented"); 266} 267 268void 269i80312_io_bs_free(void *t, bus_space_handle_t bsh, bus_size_t size) 270{ 271 272 panic("i80312_io_bs_free(): not implemented"); 273} 274 275void * 276i80312_io_bs_vaddr(void *t, bus_space_handle_t bsh) 277{ 278 279 /* Not supported. */ 280 return (NULL); 281} 282 283/* *** Routines for PCI MEM. *** */ 284 285int 286i80312_mem_bs_map(void *t, bus_addr_t bpa, bus_size_t size, int flags, 287 bus_space_handle_t *bshp) 288{ 289 290 struct i80312_softc *sc = t; 291 vaddr_t va; 292 uint32_t busbase, bussize; 293 paddr_t pa, endpa, physbase; 294 295 if (bpa >= sc->sc_pmemout_base && 296 bpa < (sc->sc_pmemout_base + sc->sc_pmemout_size)) { 297 busbase = sc->sc_pmemout_base; 298 bussize = sc->sc_pmemout_size; 299 physbase = I80312_PCI_XLATE_PMW_BASE; 300 } else if (bpa >= sc->sc_smemout_base && 301 bpa < (sc->sc_smemout_base + sc->sc_smemout_size)) { 302 busbase = sc->sc_smemout_base; 303 bussize = sc->sc_smemout_size; 304 physbase = I80312_PCI_XLATE_SMW_BASE; 305 } else 306 return (EINVAL); 307 308 if ((bpa + size) >= (busbase + bussize)) 309 return (EINVAL); 310 311 /* 312 * Found the window -- PCI MEM space is now mapped by allocating 313 * some kernel VA space and mapping the pages with pmap_enter(). 314 * pmap_enter() will map unmanaged pages as non-cacheable. 315 */ 316 pa = trunc_page((bpa - busbase) + physbase); 317 endpa = round_page(((bpa - busbase) + physbase) + size); 318 319 va = uvm_km_alloc(kernel_map, endpa - pa, 0, 320 UVM_KMF_VAONLY | UVM_KMF_NOWAIT); 321 if (va == 0) 322 return (ENOMEM); 323 324 *bshp = va + (bpa & PAGE_MASK); 325 326 for (; pa < endpa; pa += PAGE_SIZE, va += PAGE_SIZE) { 327 pmap_enter(pmap_kernel(), va, pa, 328 VM_PROT_READ | VM_PROT_WRITE, 329 VM_PROT_READ | VM_PROT_WRITE | PMAP_WIRED); 330 } 331 pmap_update(pmap_kernel()); 332 333 return (0); 334} 335 336void 337i80312_mem_bs_unmap(void *t, bus_space_handle_t bsh, bus_size_t size) 338{ 339 vaddr_t va, endva; 340 341 va = trunc_page(bsh); 342 endva = round_page(bsh + size); 343 344 /* Free the kernel virtual mapping. */ 345 pmap_remove(pmap_kernel(), va, endva); 346 pmap_update(pmap_kernel()); 347 uvm_km_free(kernel_map, va, endva - va, UVM_KMF_VAONLY); 348} 349 350int 351i80312_mem_bs_alloc(void *t, bus_addr_t rstart, bus_addr_t rend, 352 bus_size_t size, bus_size_t alignment, bus_size_t boundary, int flags, 353 bus_addr_t *bpap, bus_space_handle_t *bshp) 354{ 355 356 panic("i80312_mem_bs_alloc(): not implemented"); 357} 358 359void 360i80312_mem_bs_free(void *t, bus_space_handle_t bsh, bus_size_t size) 361{ 362 363 panic("i80312_mem_bs_free(): not implemented"); 364} 365 366paddr_t 367i80312_mem_bs_mmap(void *t, bus_addr_t addr, off_t off, int prot, int flags) 368{ 369 370 /* XXX */ 371 return (-1); 372} 373