| 1 | /* This file is part of the program psim. |
| 2 | |
| 3 | Copyright 1994, 1995, 1996, 2003, 2004 Andrew Cagney |
| 4 | |
| 5 | This program is free software; you can redistribute it and/or modify |
| 6 | it under the terms of the GNU General Public License as published by |
| 7 | the Free Software Foundation; either version 3 of the License, or |
| 8 | (at your option) any later version. |
| 9 | |
| 10 | This program is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | GNU General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU General Public License |
| 16 | along with this program; if not, see <http://www.gnu.org/licenses/>. |
| 17 | |
| 18 | */ |
| 19 | |
| 20 | |
| 21 | #ifndef _HW_HTAB_C_ |
| 22 | #define _HW_HTAB_C_ |
| 23 | |
| 24 | #include "device_table.h" |
| 25 | #include "device.h" |
| 26 | |
| 27 | #include "bfd.h" |
| 28 | |
| 29 | |
| 30 | /* DEVICE |
| 31 | |
| 32 | |
| 33 | htab - pseudo-device describing a PowerPC hash table |
| 34 | |
| 35 | |
| 36 | DESCRIPTION |
| 37 | |
| 38 | |
| 39 | During the initialization of the device tree, the pseudo-device |
| 40 | <<htab>>, in conjunction with any child <<pte>> pseudo-devices, |
| 41 | will create a PowerPC hash table in memory. The hash table values |
| 42 | are written using dma transfers. |
| 43 | |
| 44 | The size and address of the hash table are determined by properties |
| 45 | of the htab node. |
| 46 | |
| 47 | By convention, the htab device is made a child of the |
| 48 | <</openprom/init>> node. |
| 49 | |
| 50 | By convention, the real address of the htab is used as the htab |
| 51 | nodes unit address. |
| 52 | |
| 53 | |
| 54 | PROPERTIES |
| 55 | |
| 56 | |
| 57 | real-address = <address> (required) |
| 58 | |
| 59 | The physical address of the hash table. The PowerPC architecture |
| 60 | places limitations on what is a valid hash table real-address. |
| 61 | |
| 62 | |
| 63 | nr-bytes = <size> (required) |
| 64 | |
| 65 | The size of the hash table (in bytes) that is to be created at |
| 66 | <<real-address>>. The PowerPC architecture places limitations on |
| 67 | what is a valid hash table size. |
| 68 | |
| 69 | |
| 70 | claim = <anything> (optional) |
| 71 | |
| 72 | If this property is present, the memory used to construct the hash |
| 73 | table will be claimed from the memory device. The memory device |
| 74 | being specified by the <</chosen/memory>> ihandle property. |
| 75 | |
| 76 | |
| 77 | EXAMPLES |
| 78 | |
| 79 | Enable tracing. |
| 80 | |
| 81 | | $ psim -t htab-device \ |
| 82 | |
| 83 | |
| 84 | Create a htab specifying the base address and minimum size. |
| 85 | |
| 86 | | -o '/openprom/init/htab@0x10000/real-address 0x10000' \ |
| 87 | | -o '/openprom/init/htab@0x10000/claim 0' \ |
| 88 | | -o '/openprom/init/htab@0x10000/nr-bytes 65536' \ |
| 89 | |
| 90 | |
| 91 | BUGS |
| 92 | |
| 93 | |
| 94 | See the <<pte>> device. |
| 95 | |
| 96 | |
| 97 | */ |
| 98 | |
| 99 | |
| 100 | /* DEVICE |
| 101 | |
| 102 | |
| 103 | pte - pseudo-device describing a htab entry |
| 104 | |
| 105 | |
| 106 | DESCRIPTION |
| 107 | |
| 108 | |
| 109 | The <<pte>> pseudo-device, which must be a child of a <<htabl>> |
| 110 | node, describes a virtual to physical mapping that is to be entered |
| 111 | into the parents hash table. |
| 112 | |
| 113 | Two alternative specifications of the mapping are allowed. Either |
| 114 | a section of physical memory can be mapped to a virtual address, or |
| 115 | the header of an executible image can be used to define the |
| 116 | mapping. |
| 117 | |
| 118 | By convention, the real address of the map is specified as the pte |
| 119 | devices unit address. |
| 120 | |
| 121 | |
| 122 | PROPERTIES |
| 123 | |
| 124 | |
| 125 | real-address = <address> (required) |
| 126 | |
| 127 | The starting physical address that is to be mapped by the hash |
| 128 | table. |
| 129 | |
| 130 | |
| 131 | wimg = <int> (required) |
| 132 | pp = <int> (required) |
| 133 | |
| 134 | The value of hash table protection bits that are to be used when |
| 135 | creating the virtual to physical address map. |
| 136 | |
| 137 | |
| 138 | claim = <anything> (optional) |
| 139 | |
| 140 | If this property is present, the real memory that is being mapped by the |
| 141 | hash table will be claimed from the memory node (specified by the |
| 142 | ihandle <</chosen/memory>>). |
| 143 | |
| 144 | |
| 145 | virtual-address = <integer> [ <integer> ] (option A) |
| 146 | nr-bytes = <size> (option A) |
| 147 | |
| 148 | Option A - Virtual virtual address (and size) at which the physical |
| 149 | address is to be mapped. If multiple values are specified for the |
| 150 | virtual address then they are concatenated to gether to form a |
| 151 | longer virtual address. |
| 152 | |
| 153 | |
| 154 | file-name = <string> (option B) |
| 155 | |
| 156 | Option B - An executable image that is to be loaded (starting at |
| 157 | the physical address specified above) and then mapped in using |
| 158 | informatioin taken from the executables header. information found |
| 159 | in the files header. |
| 160 | |
| 161 | |
| 162 | EXAMPLES |
| 163 | |
| 164 | |
| 165 | Enable tracing (note that both the <<htab>> and <<pte>> device use the |
| 166 | same trace option). |
| 167 | |
| 168 | | -t htab-device \ |
| 169 | |
| 170 | |
| 171 | Map a block of physical memory into a specified virtual address: |
| 172 | |
| 173 | | -o '/openprom/init/htab/pte@0x0/real-address 0' \ |
| 174 | | -o '/openprom/init/htab/pte@0x0/nr-bytes 4096' \ |
| 175 | | -o '/openprom/init/htab/pte@0x0/virtual-address 0x1000000' \ |
| 176 | | -o '/openprom/init/htab/pte@0x0/claim 0' \ |
| 177 | | -o '/openprom/init/htab/pte@0x0/wimg 0x7' \ |
| 178 | | -o '/openprom/init/htab/pte@0x0/pp 0x2' \ |
| 179 | |
| 180 | |
| 181 | Map a file into memory. |
| 182 | |
| 183 | | -o '/openprom/init/htab/pte@0x10000/real-address 0x10000' \ |
| 184 | | -o '/openprom/init/htab/pte@0x10000/file-name "netbsd.elf' \ |
| 185 | | -o '/openprom/init/htab/pte@0x10000/wimg 0x7' \ |
| 186 | | -o '/openprom/init/htab/pte@0x10000/pp 0x2' \ |
| 187 | |
| 188 | |
| 189 | BUGS |
| 190 | |
| 191 | |
| 192 | For an ELF executable, the header defines both the virtual and real |
| 193 | address at which each file section should be loaded. At present, the |
| 194 | real addresses that are specified in the header are ignored, the file |
| 195 | instead being loaded in to physical memory in a linear fashion. |
| 196 | |
| 197 | When claiming memory, this device assumes that the #address-cells |
| 198 | and #size-cells is one. For future implementations, this may not |
| 199 | be the case. |
| 200 | |
| 201 | */ |
| 202 | |
| 203 | |
| 204 | |
| 205 | static void |
| 206 | htab_decode_hash_table(device *me, |
| 207 | unsigned32 *htaborg, |
| 208 | unsigned32 *htabmask) |
| 209 | { |
| 210 | unsigned_word htab_ra; |
| 211 | unsigned htab_nr_bytes; |
| 212 | unsigned n; |
| 213 | device *parent = device_parent(me); |
| 214 | /* determine the location/size of the hash table */ |
| 215 | if (parent == NULL |
| 216 | || strcmp(device_name(parent), "htab") != 0) |
| 217 | device_error(parent, "must be a htab device"); |
| 218 | htab_ra = device_find_integer_property(parent, "real-address"); |
| 219 | htab_nr_bytes = device_find_integer_property(parent, "nr-bytes"); |
| 220 | if (htab_nr_bytes < 0x10000) { |
| 221 | device_error(parent, "htab size 0x%x less than 0x1000", |
| 222 | htab_nr_bytes); |
| 223 | } |
| 224 | for (n = htab_nr_bytes; n > 1; n = n / 2) { |
| 225 | if (n % 2 != 0) |
| 226 | device_error(parent, "htab size 0x%x not a power of two", |
| 227 | htab_nr_bytes); |
| 228 | } |
| 229 | *htaborg = htab_ra; |
| 230 | /* Position the HTABMASK ready for use against a hashed address and |
| 231 | not ready for insertion into SDR1.HTABMASK. */ |
| 232 | *htabmask = MASKED32(htab_nr_bytes - 1, 7, 31-6); |
| 233 | /* Check that the MASK and ADDRESS do not overlap. */ |
| 234 | if ((htab_ra & (*htabmask)) != 0) { |
| 235 | device_error(parent, "htaborg 0x%lx not aligned to htabmask 0x%lx", |
| 236 | (unsigned long)*htaborg, (unsigned long)*htabmask); |
| 237 | } |
| 238 | DTRACE(htab, ("htab - htaborg=0x%lx htabmask=0x%lx\n", |
| 239 | (unsigned long)*htaborg, (unsigned long)*htabmask)); |
| 240 | } |
| 241 | |
| 242 | static void |
| 243 | htab_map_page(device *me, |
| 244 | unsigned_word ra, |
| 245 | unsigned64 va, |
| 246 | unsigned wimg, |
| 247 | unsigned pp, |
| 248 | unsigned32 htaborg, |
| 249 | unsigned32 htabmask) |
| 250 | { |
| 251 | /* keep everything left shifted so that the numbering is easier */ |
| 252 | unsigned64 vpn = va << 12; |
| 253 | unsigned32 vsid = INSERTED32(EXTRACTED64(vpn, 0, 23), 0, 23); |
| 254 | unsigned32 vpage = INSERTED32(EXTRACTED64(vpn, 24, 39), 0, 15); |
| 255 | unsigned32 hash = INSERTED32(EXTRACTED32(vsid, 5, 23) |
| 256 | ^ EXTRACTED32(vpage, 0, 15), |
| 257 | 7, 31-6); |
| 258 | int h; |
| 259 | for (h = 0; h < 2; h++) { |
| 260 | unsigned32 pteg = (htaborg | (hash & htabmask)); |
| 261 | int pti; |
| 262 | for (pti = 0; pti < 8; pti++) { |
| 263 | unsigned32 pte = pteg + 8 * pti; |
| 264 | unsigned32 current_target_pte0; |
| 265 | unsigned32 current_pte0; |
| 266 | if (device_dma_read_buffer(device_parent(me), |
| 267 | ¤t_target_pte0, |
| 268 | 0, /*space*/ |
| 269 | pte, |
| 270 | sizeof(current_target_pte0)) != 4) |
| 271 | device_error(me, "failed to read a pte at 0x%lx", (unsigned long)pte); |
| 272 | current_pte0 = T2H_4(current_target_pte0); |
| 273 | if (MASKED32(current_pte0, 0, 0)) { |
| 274 | /* full pte, check it isn't already mapping the same virtual |
| 275 | address */ |
| 276 | unsigned32 curr_vsid = INSERTED32(EXTRACTED32(current_pte0, 1, 24), 0, 23); |
| 277 | unsigned32 curr_api = INSERTED32(EXTRACTED32(current_pte0, 26, 31), 0, 5); |
| 278 | unsigned32 curr_h = EXTRACTED32(current_pte0, 25, 25); |
| 279 | if (curr_h == h |
| 280 | && curr_vsid == vsid |
| 281 | && curr_api == MASKED32(vpage, 0, 5)) |
| 282 | device_error(me, "duplicate map - va=0x%08lx ra=0x%lx vsid=0x%lx h=%d vpage=0x%lx hash=0x%lx pteg=0x%lx+%2d pte0=0x%lx", |
| 283 | (unsigned long)va, |
| 284 | (unsigned long)ra, |
| 285 | (unsigned long)vsid, |
| 286 | h, |
| 287 | (unsigned long)vpage, |
| 288 | (unsigned long)hash, |
| 289 | (unsigned long)pteg, |
| 290 | pti * 8, |
| 291 | (unsigned long)current_pte0); |
| 292 | } |
| 293 | else { |
| 294 | /* empty pte fill it */ |
| 295 | unsigned32 pte0 = (MASK32(0, 0) |
| 296 | | INSERTED32(EXTRACTED32(vsid, 0, 23), 1, 24) |
| 297 | | INSERTED32(h, 25, 25) |
| 298 | | INSERTED32(EXTRACTED32(vpage, 0, 5), 26, 31)); |
| 299 | unsigned32 target_pte0 = H2T_4(pte0); |
| 300 | unsigned32 pte1 = (INSERTED32(EXTRACTED32(ra, 0, 19), 0, 19) |
| 301 | | INSERTED32(wimg, 25, 28) |
| 302 | | INSERTED32(pp, 30, 31)); |
| 303 | unsigned32 target_pte1 = H2T_4(pte1); |
| 304 | if (device_dma_write_buffer(device_parent(me), |
| 305 | &target_pte0, |
| 306 | 0, /*space*/ |
| 307 | pte, |
| 308 | sizeof(target_pte0), |
| 309 | 1/*ro?*/) != 4 |
| 310 | || device_dma_write_buffer(device_parent(me), |
| 311 | &target_pte1, |
| 312 | 0, /*space*/ |
| 313 | pte + 4, |
| 314 | sizeof(target_pte1), |
| 315 | 1/*ro?*/) != 4) |
| 316 | device_error(me, "failed to write a pte a 0x%lx", (unsigned long)pte); |
| 317 | DTRACE(htab, ("map - va=0x%08lx ra=0x%lx vsid=0x%lx h=%d vpage=0x%lx hash=0x%lx pteg=0x%lx+%2d pte0=0x%lx pte1=0x%lx\n", |
| 318 | (unsigned long)va, |
| 319 | (unsigned long)ra, |
| 320 | (unsigned long)vsid, |
| 321 | h, |
| 322 | (unsigned long)vpage, |
| 323 | (unsigned long)hash, |
| 324 | (unsigned long)pteg, |
| 325 | pti * 8, |
| 326 | (unsigned long)pte0, |
| 327 | (unsigned long)pte1)); |
| 328 | return; |
| 329 | } |
| 330 | } |
| 331 | /* re-hash */ |
| 332 | hash = MASKED32(~hash, 0, 18); |
| 333 | } |
| 334 | } |
| 335 | |
| 336 | static unsigned_word |
| 337 | claim_memory(device *me, |
| 338 | device_instance *memory, |
| 339 | unsigned_word ra, |
| 340 | unsigned_word size) |
| 341 | { |
| 342 | unsigned32 args[3]; |
| 343 | unsigned32 results[1]; |
| 344 | int status; |
| 345 | args[0] = 0; /* alignment */ |
| 346 | args[1] = size; |
| 347 | args[2] = ra; |
| 348 | status = device_instance_call_method(memory, "claim", 3, args, 1, results); |
| 349 | if (status != 0) |
| 350 | device_error(me, "failed to claim memory"); |
| 351 | return results[0]; |
| 352 | } |
| 353 | |
| 354 | static void |
| 355 | htab_map_region(device *me, |
| 356 | device_instance *memory, |
| 357 | unsigned_word pte_ra, |
| 358 | unsigned64 pte_va, |
| 359 | unsigned nr_bytes, |
| 360 | unsigned wimg, |
| 361 | unsigned pp, |
| 362 | unsigned32 htaborg, |
| 363 | unsigned32 htabmask) |
| 364 | { |
| 365 | unsigned_word ra; |
| 366 | unsigned64 va; |
| 367 | /* claim the memory */ |
| 368 | if (memory != NULL) |
| 369 | claim_memory(me, memory, pte_ra, nr_bytes); |
| 370 | /* go through all pages and create a pte for each */ |
| 371 | for (ra = pte_ra, va = pte_va; |
| 372 | ra < pte_ra + nr_bytes; |
| 373 | ra += 0x1000, va += 0x1000) { |
| 374 | htab_map_page(me, ra, va, wimg, pp, htaborg, htabmask); |
| 375 | } |
| 376 | } |
| 377 | |
| 378 | typedef struct _htab_binary_sizes { |
| 379 | unsigned_word text_ra; |
| 380 | unsigned_word text_base; |
| 381 | unsigned_word text_bound; |
| 382 | unsigned_word data_ra; |
| 383 | unsigned_word data_base; |
| 384 | unsigned data_bound; |
| 385 | device *me; |
| 386 | } htab_binary_sizes; |
| 387 | |
| 388 | static void |
| 389 | htab_sum_binary(bfd *abfd, |
| 390 | sec_ptr sec, |
| 391 | PTR data) |
| 392 | { |
| 393 | htab_binary_sizes *sizes = (htab_binary_sizes*)data; |
| 394 | unsigned_word size = bfd_get_section_size (sec); |
| 395 | unsigned_word vma = bfd_get_section_vma (abfd, sec); |
| 396 | unsigned_word ra = bfd_get_section_lma (abfd, sec); |
| 397 | |
| 398 | /* skip the section if no memory to allocate */ |
| 399 | if (! (bfd_get_section_flags(abfd, sec) & SEC_ALLOC)) |
| 400 | return; |
| 401 | |
| 402 | if ((bfd_get_section_flags (abfd, sec) & SEC_CODE) |
| 403 | || (bfd_get_section_flags (abfd, sec) & SEC_READONLY)) { |
| 404 | if (sizes->text_bound < vma + size) |
| 405 | sizes->text_bound = ALIGN_PAGE(vma + size); |
| 406 | if (sizes->text_base > vma) |
| 407 | sizes->text_base = FLOOR_PAGE(vma); |
| 408 | if (sizes->text_ra > ra) |
| 409 | sizes->text_ra = FLOOR_PAGE(ra); |
| 410 | } |
| 411 | else if ((bfd_get_section_flags (abfd, sec) & SEC_DATA) |
| 412 | || (bfd_get_section_flags (abfd, sec) & SEC_ALLOC)) { |
| 413 | if (sizes->data_bound < vma + size) |
| 414 | sizes->data_bound = ALIGN_PAGE(vma + size); |
| 415 | if (sizes->data_base > vma) |
| 416 | sizes->data_base = FLOOR_PAGE(vma); |
| 417 | if (sizes->data_ra > ra) |
| 418 | sizes->data_ra = FLOOR_PAGE(ra); |
| 419 | } |
| 420 | } |
| 421 | |
| 422 | static void |
| 423 | htab_dma_binary(bfd *abfd, |
| 424 | sec_ptr sec, |
| 425 | PTR data) |
| 426 | { |
| 427 | htab_binary_sizes *sizes = (htab_binary_sizes*)data; |
| 428 | void *section_init; |
| 429 | unsigned_word section_vma; |
| 430 | unsigned_word section_size; |
| 431 | unsigned_word section_ra; |
| 432 | device *me = sizes->me; |
| 433 | |
| 434 | /* skip the section if no memory to allocate */ |
| 435 | if (! (bfd_get_section_flags(abfd, sec) & SEC_ALLOC)) |
| 436 | return; |
| 437 | |
| 438 | /* check/ignore any sections of size zero */ |
| 439 | section_size = bfd_get_section_size (sec); |
| 440 | if (section_size == 0) |
| 441 | return; |
| 442 | |
| 443 | /* if nothing to load, ignore this one */ |
| 444 | if (! (bfd_get_section_flags(abfd, sec) & SEC_LOAD)) |
| 445 | return; |
| 446 | |
| 447 | /* find where it is to go */ |
| 448 | section_vma = bfd_get_section_vma(abfd, sec); |
| 449 | section_ra = 0; |
| 450 | if ((bfd_get_section_flags (abfd, sec) & SEC_CODE) |
| 451 | || (bfd_get_section_flags (abfd, sec) & SEC_READONLY)) |
| 452 | section_ra = (section_vma - sizes->text_base + sizes->text_ra); |
| 453 | else if ((bfd_get_section_flags (abfd, sec) & SEC_DATA)) |
| 454 | section_ra = (section_vma - sizes->data_base + sizes->data_ra); |
| 455 | else |
| 456 | return; /* just ignore it */ |
| 457 | |
| 458 | DTRACE(htab, |
| 459 | ("load - name=%-7s vma=0x%.8lx size=%6ld ra=0x%.8lx flags=%3lx(%s%s%s%s%s )\n", |
| 460 | bfd_get_section_name(abfd, sec), |
| 461 | (long)section_vma, |
| 462 | (long)section_size, |
| 463 | (long)section_ra, |
| 464 | (long)bfd_get_section_flags(abfd, sec), |
| 465 | bfd_get_section_flags(abfd, sec) & SEC_LOAD ? " LOAD" : "", |
| 466 | bfd_get_section_flags(abfd, sec) & SEC_CODE ? " CODE" : "", |
| 467 | bfd_get_section_flags(abfd, sec) & SEC_DATA ? " DATA" : "", |
| 468 | bfd_get_section_flags(abfd, sec) & SEC_ALLOC ? " ALLOC" : "", |
| 469 | bfd_get_section_flags(abfd, sec) & SEC_READONLY ? " READONLY" : "" |
| 470 | )); |
| 471 | |
| 472 | /* dma in the sections data */ |
| 473 | section_init = zalloc(section_size); |
| 474 | if (!bfd_get_section_contents(abfd, |
| 475 | sec, |
| 476 | section_init, 0, |
| 477 | section_size)) { |
| 478 | bfd_perror("devices/pte"); |
| 479 | device_error(me, "no data loaded"); |
| 480 | } |
| 481 | if (device_dma_write_buffer(device_parent(me), |
| 482 | section_init, |
| 483 | 0 /*space*/, |
| 484 | section_ra, |
| 485 | section_size, |
| 486 | 1 /*violate_read_only*/) |
| 487 | != section_size) |
| 488 | device_error(me, "broken dma transfer"); |
| 489 | free(section_init); /* only free if load */ |
| 490 | } |
| 491 | |
| 492 | /* create a memory map from a binaries virtual addresses to a copy of |
| 493 | the binary laid out linearly in memory */ |
| 494 | |
| 495 | static void |
| 496 | htab_map_binary(device *me, |
| 497 | device_instance *memory, |
| 498 | unsigned_word ra, |
| 499 | unsigned wimg, |
| 500 | unsigned pp, |
| 501 | const char *file_name, |
| 502 | unsigned32 htaborg, |
| 503 | unsigned32 htabmask) |
| 504 | { |
| 505 | htab_binary_sizes sizes; |
| 506 | bfd *image; |
| 507 | sizes.text_ra = -1; |
| 508 | sizes.data_ra = -1; |
| 509 | sizes.text_base = -1; |
| 510 | sizes.data_base = -1; |
| 511 | sizes.text_bound = 0; |
| 512 | sizes.data_bound = 0; |
| 513 | sizes.me = me; |
| 514 | |
| 515 | /* open the file */ |
| 516 | image = bfd_openr(file_name, NULL); |
| 517 | if (image == NULL) { |
| 518 | bfd_perror("devices/pte"); |
| 519 | device_error(me, "the file %s not loaded", file_name); |
| 520 | } |
| 521 | |
| 522 | /* check it is valid */ |
| 523 | if (!bfd_check_format(image, bfd_object)) { |
| 524 | bfd_close(image); |
| 525 | device_error(me, "the file %s has an invalid binary format", file_name); |
| 526 | } |
| 527 | |
| 528 | /* determine the size of each of the files regions */ |
| 529 | bfd_map_over_sections (image, htab_sum_binary, (PTR) &sizes); |
| 530 | |
| 531 | /* if needed, determine the real addresses of the sections */ |
| 532 | if (ra != -1) { |
| 533 | sizes.text_ra = ra; |
| 534 | sizes.data_ra = ALIGN_PAGE(sizes.text_ra + |
| 535 | (sizes.text_bound - sizes.text_base)); |
| 536 | } |
| 537 | |
| 538 | DTRACE(htab, ("text map - base=0x%lx bound=0x%lx-1 ra=0x%lx\n", |
| 539 | (unsigned long)sizes.text_base, |
| 540 | (unsigned long)sizes.text_bound, |
| 541 | (unsigned long)sizes.text_ra)); |
| 542 | DTRACE(htab, ("data map - base=0x%lx bound=0x%lx-1 ra=0x%lx\n", |
| 543 | (unsigned long)sizes.data_base, |
| 544 | (unsigned long)sizes.data_bound, |
| 545 | (unsigned long)sizes.data_ra)); |
| 546 | |
| 547 | /* check for and fix a botched image (text and data segments |
| 548 | overlap) */ |
| 549 | if ((sizes.text_base <= sizes.data_base |
| 550 | && sizes.text_bound >= sizes.data_bound) |
| 551 | || (sizes.data_base <= sizes.text_base |
| 552 | && sizes.data_bound >= sizes.data_bound) |
| 553 | || (sizes.text_bound > sizes.data_base |
| 554 | && sizes.text_bound <= sizes.data_bound) |
| 555 | || (sizes.text_base >= sizes.data_base |
| 556 | && sizes.text_base < sizes.data_bound)) { |
| 557 | DTRACE(htab, ("text and data segment overlaped - using just data segment\n")); |
| 558 | /* check va->ra linear */ |
| 559 | if ((sizes.text_base - sizes.text_ra) |
| 560 | != (sizes.data_base - sizes.data_ra)) |
| 561 | device_error(me, "overlapping but missaligned text and data segments"); |
| 562 | /* enlarge the data segment */ |
| 563 | if (sizes.text_base < sizes.data_base) |
| 564 | sizes.data_base = sizes.text_base; |
| 565 | if (sizes.text_bound > sizes.data_bound) |
| 566 | sizes.data_bound = sizes.text_bound; |
| 567 | if (sizes.text_ra < sizes.data_ra) |
| 568 | sizes.data_ra = sizes.text_ra; |
| 569 | /* zap the text segment */ |
| 570 | sizes.text_base = 0; |
| 571 | sizes.text_bound = 0; |
| 572 | sizes.text_ra = 0; |
| 573 | DTRACE(htab, ("common map - base=0x%lx bound=0x%lx-1 ra=0x%lx\n", |
| 574 | (unsigned long)sizes.data_base, |
| 575 | (unsigned long)sizes.data_bound, |
| 576 | (unsigned long)sizes.data_ra)); |
| 577 | } |
| 578 | |
| 579 | /* set up virtual memory maps for each of the regions */ |
| 580 | if (sizes.text_bound - sizes.text_base > 0) { |
| 581 | htab_map_region(me, memory, sizes.text_ra, sizes.text_base, |
| 582 | sizes.text_bound - sizes.text_base, |
| 583 | wimg, pp, |
| 584 | htaborg, htabmask); |
| 585 | } |
| 586 | |
| 587 | htab_map_region(me, memory, sizes.data_ra, sizes.data_base, |
| 588 | sizes.data_bound - sizes.data_base, |
| 589 | wimg, pp, |
| 590 | htaborg, htabmask); |
| 591 | |
| 592 | /* dma the sections into physical memory */ |
| 593 | bfd_map_over_sections (image, htab_dma_binary, (PTR) &sizes); |
| 594 | } |
| 595 | |
| 596 | static void |
| 597 | htab_init_data_callback(device *me) |
| 598 | { |
| 599 | device_instance *memory = NULL; |
| 600 | if (WITH_TARGET_WORD_BITSIZE != 32) |
| 601 | device_error(me, "only 32bit targets currently suported"); |
| 602 | |
| 603 | /* find memory device */ |
| 604 | if (device_find_property(me, "claim") != NULL) |
| 605 | memory = tree_find_ihandle_property(me, "/chosen/memory"); |
| 606 | |
| 607 | /* for the htab, just allocate space for it */ |
| 608 | if (strcmp(device_name(me), "htab") == 0) { |
| 609 | unsigned_word address = device_find_integer_property(me, "real-address"); |
| 610 | unsigned_word length = device_find_integer_property(me, "nr-bytes"); |
| 611 | unsigned_word base = claim_memory(me, memory, address, length); |
| 612 | if (base == -1 || base != address) |
| 613 | device_error(me, "cannot allocate hash table"); |
| 614 | } |
| 615 | |
| 616 | /* for the pte, do all the real work */ |
| 617 | if (strcmp(device_name(me), "pte") == 0) { |
| 618 | unsigned32 htaborg; |
| 619 | unsigned32 htabmask; |
| 620 | |
| 621 | htab_decode_hash_table(me, &htaborg, &htabmask); |
| 622 | |
| 623 | if (device_find_property(me, "file-name") != NULL) { |
| 624 | /* map in a binary */ |
| 625 | unsigned pte_wimg = device_find_integer_property(me, "wimg"); |
| 626 | unsigned pte_pp = device_find_integer_property(me, "pp"); |
| 627 | const char *file_name = device_find_string_property(me, "file-name"); |
| 628 | if (device_find_property(me, "real-address") != NULL) { |
| 629 | unsigned32 pte_ra = device_find_integer_property(me, "real-address"); |
| 630 | DTRACE(htab, ("pte - ra=0x%lx, wimg=%ld, pp=%ld, file-name=%s\n", |
| 631 | (unsigned long)pte_ra, |
| 632 | (unsigned long)pte_wimg, |
| 633 | (long)pte_pp, |
| 634 | file_name)); |
| 635 | htab_map_binary(me, memory, pte_ra, pte_wimg, pte_pp, file_name, |
| 636 | htaborg, htabmask); |
| 637 | } |
| 638 | else { |
| 639 | DTRACE(htab, ("pte - wimg=%ld, pp=%ld, file-name=%s\n", |
| 640 | (unsigned long)pte_wimg, |
| 641 | (long)pte_pp, |
| 642 | file_name)); |
| 643 | htab_map_binary(me, memory, -1, pte_wimg, pte_pp, file_name, |
| 644 | htaborg, htabmask); |
| 645 | } |
| 646 | } |
| 647 | else { |
| 648 | /* handle a normal mapping definition */ |
| 649 | unsigned64 pte_va = 0; |
| 650 | unsigned32 pte_ra = device_find_integer_property(me, "real-address"); |
| 651 | unsigned pte_nr_bytes = device_find_integer_property(me, "nr-bytes"); |
| 652 | unsigned pte_wimg = device_find_integer_property(me, "wimg"); |
| 653 | unsigned pte_pp = device_find_integer_property(me, "pp"); |
| 654 | signed_cell partial_va; |
| 655 | int i; |
| 656 | for (i = 0; |
| 657 | device_find_integer_array_property(me, "virtual-address", i, &partial_va); |
| 658 | i++) { |
| 659 | pte_va = (pte_va << WITH_TARGET_WORD_BITSIZE) | (unsigned_cell)partial_va; |
| 660 | } |
| 661 | DTRACE(htab, ("pte - ra=0x%lx, wimg=%ld, pp=%ld, va=0x%lx, nr_bytes=%ld\n", |
| 662 | (unsigned long)pte_ra, |
| 663 | (long)pte_wimg, |
| 664 | (long)pte_pp, |
| 665 | (unsigned long)pte_va, |
| 666 | (long)pte_nr_bytes)); |
| 667 | htab_map_region(me, memory, pte_ra, pte_va, pte_nr_bytes, pte_wimg, pte_pp, |
| 668 | htaborg, htabmask); |
| 669 | } |
| 670 | } |
| 671 | } |
| 672 | |
| 673 | |
| 674 | static device_callbacks const htab_callbacks = { |
| 675 | { NULL, htab_init_data_callback, }, |
| 676 | { NULL, }, /* address */ |
| 677 | { NULL, }, /* IO */ |
| 678 | { passthrough_device_dma_read_buffer, |
| 679 | passthrough_device_dma_write_buffer, }, |
| 680 | { NULL, }, /* interrupt */ |
| 681 | { generic_device_unit_decode, |
| 682 | generic_device_unit_encode, }, |
| 683 | }; |
| 684 | |
| 685 | const device_descriptor hw_htab_device_descriptor[] = { |
| 686 | { "htab", NULL, &htab_callbacks }, |
| 687 | { "pte", NULL, &htab_callbacks }, /* yep - uses htab's table */ |
| 688 | { NULL }, |
| 689 | }; |
| 690 | |
| 691 | #endif /* _HW_HTAB_C_ */ |