1 /* 2 * PS3 flash memory os area. 3 * 4 * Copyright (C) 2006 Sony Computer Entertainment Inc. 5 * Copyright 2006 Sony Corp. 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation; version 2 of the License. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 19 */ 20 21 #include <linux/kernel.h> 22 #include <linux/io.h> 23 #include <linux/workqueue.h> 24 #include <linux/fs.h> 25 #include <linux/syscalls.h> 26 #include <linux/ctype.h> 27 #include <linux/lmb.h> 28 #include <linux/of.h> 29 30 #include <asm/prom.h> 31 32 #include "platform.h" 33 34 enum { 35 OS_AREA_SEGMENT_SIZE = 0X200, 36 }; 37 38 enum os_area_ldr_format { 39 HEADER_LDR_FORMAT_RAW = 0, 40 HEADER_LDR_FORMAT_GZIP = 1, 41 }; 42 43 #define OS_AREA_HEADER_MAGIC_NUM "cell_ext_os_area" 44 45 /** 46 * struct os_area_header - os area header segment. 47 * @magic_num: Always 'cell_ext_os_area'. 48 * @hdr_version: Header format version number. 49 * @db_area_offset: Starting segment number of other os database area. 50 * @ldr_area_offset: Starting segment number of bootloader image area. 51 * @ldr_format: HEADER_LDR_FORMAT flag. 52 * @ldr_size: Size of bootloader image in bytes. 53 * 54 * Note that the docs refer to area offsets. These are offsets in units of 55 * segments from the start of the os area (top of the header). These are 56 * better thought of as segment numbers. The os area of the os area is 57 * reserved for the os image. 58 */ 59 60 struct os_area_header { 61 u8 magic_num[16]; 62 u32 hdr_version; 63 u32 db_area_offset; 64 u32 ldr_area_offset; 65 u32 _reserved_1; 66 u32 ldr_format; 67 u32 ldr_size; 68 u32 _reserved_2[6]; 69 }; 70 71 enum os_area_boot_flag { 72 PARAM_BOOT_FLAG_GAME_OS = 0, 73 PARAM_BOOT_FLAG_OTHER_OS = 1, 74 }; 75 76 enum os_area_ctrl_button { 77 PARAM_CTRL_BUTTON_O_IS_YES = 0, 78 PARAM_CTRL_BUTTON_X_IS_YES = 1, 79 }; 80 81 /** 82 * struct os_area_params - os area params segment. 83 * @boot_flag: User preference of operating system, PARAM_BOOT_FLAG flag. 84 * @num_params: Number of params in this (params) segment. 85 * @rtc_diff: Difference in seconds between 1970 and the ps3 rtc value. 86 * @av_multi_out: User preference of AV output, PARAM_AV_MULTI_OUT flag. 87 * @ctrl_button: User preference of controller button config, PARAM_CTRL_BUTTON 88 * flag. 89 * @static_ip_addr: User preference of static IP address. 90 * @network_mask: User preference of static network mask. 91 * @default_gateway: User preference of static default gateway. 92 * @dns_primary: User preference of static primary dns server. 93 * @dns_secondary: User preference of static secondary dns server. 94 * 95 * The ps3 rtc maintains a read-only value that approximates seconds since 96 * 2000-01-01 00:00:00 UTC. 97 * 98 * User preference of zero for static_ip_addr means use dhcp. 99 */ 100 101 struct os_area_params { 102 u32 boot_flag; 103 u32 _reserved_1[3]; 104 u32 num_params; 105 u32 _reserved_2[3]; 106 /* param 0 */ 107 s64 rtc_diff; 108 u8 av_multi_out; 109 u8 ctrl_button; 110 u8 _reserved_3[6]; 111 /* param 1 */ 112 u8 static_ip_addr[4]; 113 u8 network_mask[4]; 114 u8 default_gateway[4]; 115 u8 _reserved_4[4]; 116 /* param 2 */ 117 u8 dns_primary[4]; 118 u8 dns_secondary[4]; 119 u8 _reserved_5[8]; 120 }; 121 122 #define OS_AREA_DB_MAGIC_NUM "-db-" 123 124 /** 125 * struct os_area_db - Shared flash memory database. 126 * @magic_num: Always '-db-'. 127 * @version: os_area_db format version number. 128 * @index_64: byte offset of the database id index for 64 bit variables. 129 * @count_64: number of usable 64 bit index entries 130 * @index_32: byte offset of the database id index for 32 bit variables. 131 * @count_32: number of usable 32 bit index entries 132 * @index_16: byte offset of the database id index for 16 bit variables. 133 * @count_16: number of usable 16 bit index entries 134 * 135 * Flash rom storage for exclusive use by guests running in the other os lpar. 136 * The current system configuration allocates 1K (two segments) for other os 137 * use. 138 */ 139 140 struct os_area_db { 141 u8 magic_num[4]; 142 u16 version; 143 u16 _reserved_1; 144 u16 index_64; 145 u16 count_64; 146 u16 index_32; 147 u16 count_32; 148 u16 index_16; 149 u16 count_16; 150 u32 _reserved_2; 151 u8 _db_data[1000]; 152 }; 153 154 /** 155 * enum os_area_db_owner - Data owners. 156 */ 157 158 enum os_area_db_owner { 159 OS_AREA_DB_OWNER_ANY = -1, 160 OS_AREA_DB_OWNER_NONE = 0, 161 OS_AREA_DB_OWNER_PROTOTYPE = 1, 162 OS_AREA_DB_OWNER_LINUX = 2, 163 OS_AREA_DB_OWNER_PETITBOOT = 3, 164 OS_AREA_DB_OWNER_MAX = 32, 165 }; 166 167 enum os_area_db_key { 168 OS_AREA_DB_KEY_ANY = -1, 169 OS_AREA_DB_KEY_NONE = 0, 170 OS_AREA_DB_KEY_RTC_DIFF = 1, 171 OS_AREA_DB_KEY_VIDEO_MODE = 2, 172 OS_AREA_DB_KEY_MAX = 8, 173 }; 174 175 struct os_area_db_id { 176 int owner; 177 int key; 178 }; 179 180 static const struct os_area_db_id os_area_db_id_empty = { 181 .owner = OS_AREA_DB_OWNER_NONE, 182 .key = OS_AREA_DB_KEY_NONE 183 }; 184 185 static const struct os_area_db_id os_area_db_id_any = { 186 .owner = OS_AREA_DB_OWNER_ANY, 187 .key = OS_AREA_DB_KEY_ANY 188 }; 189 190 static const struct os_area_db_id os_area_db_id_rtc_diff = { 191 .owner = OS_AREA_DB_OWNER_LINUX, 192 .key = OS_AREA_DB_KEY_RTC_DIFF 193 }; 194 195 static const struct os_area_db_id os_area_db_id_video_mode = { 196 .owner = OS_AREA_DB_OWNER_LINUX, 197 .key = OS_AREA_DB_KEY_VIDEO_MODE 198 }; 199 200 #define SECONDS_FROM_1970_TO_2000 946684800LL 201 202 /** 203 * struct saved_params - Static working copies of data from the PS3 'os area'. 204 * 205 * The order of preference we use for the rtc_diff source: 206 * 1) The database value. 207 * 2) The game os value. 208 * 3) The number of seconds from 1970 to 2000. 209 */ 210 211 struct saved_params { 212 unsigned int valid; 213 s64 rtc_diff; 214 unsigned int av_multi_out; 215 } static saved_params; 216 217 static struct property property_rtc_diff = { 218 .name = "linux,rtc_diff", 219 .length = sizeof(saved_params.rtc_diff), 220 .value = &saved_params.rtc_diff, 221 }; 222 223 static struct property property_av_multi_out = { 224 .name = "linux,av_multi_out", 225 .length = sizeof(saved_params.av_multi_out), 226 .value = &saved_params.av_multi_out, 227 }; 228 229 /** 230 * os_area_set_property - Add or overwrite a saved_params value to the device tree. 231 * 232 * Overwrites an existing property. 233 */ 234 235 static void os_area_set_property(struct device_node *node, 236 struct property *prop) 237 { 238 int result; 239 struct property *tmp = of_find_property(node, prop->name, NULL); 240 241 if (tmp) { 242 pr_debug("%s:%d found %s\n", __func__, __LINE__, prop->name); 243 prom_remove_property(node, tmp); 244 } 245 246 result = prom_add_property(node, prop); 247 248 if (result) 249 pr_debug("%s:%d prom_set_property failed\n", __func__, 250 __LINE__); 251 } 252 253 /** 254 * os_area_get_property - Get a saved_params value from the device tree. 255 * 256 */ 257 258 static void __init os_area_get_property(struct device_node *node, 259 struct property *prop) 260 { 261 const struct property *tmp = of_find_property(node, prop->name, NULL); 262 263 if (tmp) { 264 BUG_ON(prop->length != tmp->length); 265 memcpy(prop->value, tmp->value, prop->length); 266 } else 267 pr_debug("%s:%d not found %s\n", __func__, __LINE__, 268 prop->name); 269 } 270 271 static void dump_field(char *s, const u8 *field, int size_of_field) 272 { 273 #if defined(DEBUG) 274 int i; 275 276 for (i = 0; i < size_of_field; i++) 277 s[i] = isprint(field[i]) ? field[i] : '.'; 278 s[i] = 0; 279 #endif 280 } 281 282 #define dump_header(_a) _dump_header(_a, __func__, __LINE__) 283 static void _dump_header(const struct os_area_header *h, const char *func, 284 int line) 285 { 286 char str[sizeof(h->magic_num) + 1]; 287 288 dump_field(str, h->magic_num, sizeof(h->magic_num)); 289 pr_debug("%s:%d: h.magic_num: '%s'\n", func, line, 290 str); 291 pr_debug("%s:%d: h.hdr_version: %u\n", func, line, 292 h->hdr_version); 293 pr_debug("%s:%d: h.db_area_offset: %u\n", func, line, 294 h->db_area_offset); 295 pr_debug("%s:%d: h.ldr_area_offset: %u\n", func, line, 296 h->ldr_area_offset); 297 pr_debug("%s:%d: h.ldr_format: %u\n", func, line, 298 h->ldr_format); 299 pr_debug("%s:%d: h.ldr_size: %xh\n", func, line, 300 h->ldr_size); 301 } 302 303 #define dump_params(_a) _dump_params(_a, __func__, __LINE__) 304 static void _dump_params(const struct os_area_params *p, const char *func, 305 int line) 306 { 307 pr_debug("%s:%d: p.boot_flag: %u\n", func, line, p->boot_flag); 308 pr_debug("%s:%d: p.num_params: %u\n", func, line, p->num_params); 309 pr_debug("%s:%d: p.rtc_diff %lld\n", func, line, p->rtc_diff); 310 pr_debug("%s:%d: p.av_multi_out %u\n", func, line, p->av_multi_out); 311 pr_debug("%s:%d: p.ctrl_button: %u\n", func, line, p->ctrl_button); 312 pr_debug("%s:%d: p.static_ip_addr: %u.%u.%u.%u\n", func, line, 313 p->static_ip_addr[0], p->static_ip_addr[1], 314 p->static_ip_addr[2], p->static_ip_addr[3]); 315 pr_debug("%s:%d: p.network_mask: %u.%u.%u.%u\n", func, line, 316 p->network_mask[0], p->network_mask[1], 317 p->network_mask[2], p->network_mask[3]); 318 pr_debug("%s:%d: p.default_gateway: %u.%u.%u.%u\n", func, line, 319 p->default_gateway[0], p->default_gateway[1], 320 p->default_gateway[2], p->default_gateway[3]); 321 pr_debug("%s:%d: p.dns_primary: %u.%u.%u.%u\n", func, line, 322 p->dns_primary[0], p->dns_primary[1], 323 p->dns_primary[2], p->dns_primary[3]); 324 pr_debug("%s:%d: p.dns_secondary: %u.%u.%u.%u\n", func, line, 325 p->dns_secondary[0], p->dns_secondary[1], 326 p->dns_secondary[2], p->dns_secondary[3]); 327 } 328 329 static int verify_header(const struct os_area_header *header) 330 { 331 if (memcmp(header->magic_num, OS_AREA_HEADER_MAGIC_NUM, 332 sizeof(header->magic_num))) { 333 pr_debug("%s:%d magic_num failed\n", __func__, __LINE__); 334 return -1; 335 } 336 337 if (header->hdr_version < 1) { 338 pr_debug("%s:%d hdr_version failed\n", __func__, __LINE__); 339 return -1; 340 } 341 342 if (header->db_area_offset > header->ldr_area_offset) { 343 pr_debug("%s:%d offsets failed\n", __func__, __LINE__); 344 return -1; 345 } 346 347 return 0; 348 } 349 350 static int db_verify(const struct os_area_db *db) 351 { 352 if (memcmp(db->magic_num, OS_AREA_DB_MAGIC_NUM, 353 sizeof(db->magic_num))) { 354 pr_debug("%s:%d magic_num failed\n", __func__, __LINE__); 355 return -1; 356 } 357 358 if (db->version != 1) { 359 pr_debug("%s:%d version failed\n", __func__, __LINE__); 360 return -1; 361 } 362 363 return 0; 364 } 365 366 struct db_index { 367 uint8_t owner:5; 368 uint8_t key:3; 369 }; 370 371 struct db_iterator { 372 const struct os_area_db *db; 373 struct os_area_db_id match_id; 374 struct db_index *idx; 375 struct db_index *last_idx; 376 union { 377 uint64_t *value_64; 378 uint32_t *value_32; 379 uint16_t *value_16; 380 }; 381 }; 382 383 static unsigned int db_align_up(unsigned int val, unsigned int size) 384 { 385 return (val + (size - 1)) & (~(size - 1)); 386 } 387 388 /** 389 * db_for_each_64 - Iterator for 64 bit entries. 390 * 391 * A NULL value for id can be used to match all entries. 392 * OS_AREA_DB_OWNER_ANY and OS_AREA_DB_KEY_ANY can be used to match all. 393 */ 394 395 static int db_for_each_64(const struct os_area_db *db, 396 const struct os_area_db_id *match_id, struct db_iterator *i) 397 { 398 next: 399 if (!i->db) { 400 i->db = db; 401 i->match_id = match_id ? *match_id : os_area_db_id_any; 402 i->idx = (void *)db + db->index_64; 403 i->last_idx = i->idx + db->count_64; 404 i->value_64 = (void *)db + db->index_64 405 + db_align_up(db->count_64, 8); 406 } else { 407 i->idx++; 408 i->value_64++; 409 } 410 411 if (i->idx >= i->last_idx) { 412 pr_debug("%s:%d: reached end\n", __func__, __LINE__); 413 return 0; 414 } 415 416 if (i->match_id.owner != OS_AREA_DB_OWNER_ANY 417 && i->match_id.owner != (int)i->idx->owner) 418 goto next; 419 if (i->match_id.key != OS_AREA_DB_KEY_ANY 420 && i->match_id.key != (int)i->idx->key) 421 goto next; 422 423 return 1; 424 } 425 426 static int db_delete_64(struct os_area_db *db, const struct os_area_db_id *id) 427 { 428 struct db_iterator i; 429 430 for (i.db = NULL; db_for_each_64(db, id, &i); ) { 431 432 pr_debug("%s:%d: got (%d:%d) %llxh\n", __func__, __LINE__, 433 i.idx->owner, i.idx->key, 434 (unsigned long long)*i.value_64); 435 436 i.idx->owner = 0; 437 i.idx->key = 0; 438 *i.value_64 = 0; 439 } 440 return 0; 441 } 442 443 static int db_set_64(struct os_area_db *db, const struct os_area_db_id *id, 444 uint64_t value) 445 { 446 struct db_iterator i; 447 448 pr_debug("%s:%d: (%d:%d) <= %llxh\n", __func__, __LINE__, 449 id->owner, id->key, (unsigned long long)value); 450 451 if (!id->owner || id->owner == OS_AREA_DB_OWNER_ANY 452 || id->key == OS_AREA_DB_KEY_ANY) { 453 pr_debug("%s:%d: bad id: (%d:%d)\n", __func__, 454 __LINE__, id->owner, id->key); 455 return -1; 456 } 457 458 db_delete_64(db, id); 459 460 i.db = NULL; 461 if (db_for_each_64(db, &os_area_db_id_empty, &i)) { 462 463 pr_debug("%s:%d: got (%d:%d) %llxh\n", __func__, __LINE__, 464 i.idx->owner, i.idx->key, 465 (unsigned long long)*i.value_64); 466 467 i.idx->owner = id->owner; 468 i.idx->key = id->key; 469 *i.value_64 = value; 470 471 pr_debug("%s:%d: set (%d:%d) <= %llxh\n", __func__, __LINE__, 472 i.idx->owner, i.idx->key, 473 (unsigned long long)*i.value_64); 474 return 0; 475 } 476 pr_debug("%s:%d: database full.\n", 477 __func__, __LINE__); 478 return -1; 479 } 480 481 static int db_get_64(const struct os_area_db *db, 482 const struct os_area_db_id *id, uint64_t *value) 483 { 484 struct db_iterator i; 485 486 i.db = NULL; 487 if (db_for_each_64(db, id, &i)) { 488 *value = *i.value_64; 489 pr_debug("%s:%d: found %lld\n", __func__, __LINE__, 490 (long long int)*i.value_64); 491 return 0; 492 } 493 pr_debug("%s:%d: not found\n", __func__, __LINE__); 494 return -1; 495 } 496 497 static int db_get_rtc_diff(const struct os_area_db *db, int64_t *rtc_diff) 498 { 499 return db_get_64(db, &os_area_db_id_rtc_diff, (uint64_t*)rtc_diff); 500 } 501 502 #define dump_db(a) _dump_db(a, __func__, __LINE__) 503 static void _dump_db(const struct os_area_db *db, const char *func, 504 int line) 505 { 506 char str[sizeof(db->magic_num) + 1]; 507 508 dump_field(str, db->magic_num, sizeof(db->magic_num)); 509 pr_debug("%s:%d: db.magic_num: '%s'\n", func, line, 510 str); 511 pr_debug("%s:%d: db.version: %u\n", func, line, 512 db->version); 513 pr_debug("%s:%d: db.index_64: %u\n", func, line, 514 db->index_64); 515 pr_debug("%s:%d: db.count_64: %u\n", func, line, 516 db->count_64); 517 pr_debug("%s:%d: db.index_32: %u\n", func, line, 518 db->index_32); 519 pr_debug("%s:%d: db.count_32: %u\n", func, line, 520 db->count_32); 521 pr_debug("%s:%d: db.index_16: %u\n", func, line, 522 db->index_16); 523 pr_debug("%s:%d: db.count_16: %u\n", func, line, 524 db->count_16); 525 } 526 527 static void os_area_db_init(struct os_area_db *db) 528 { 529 enum { 530 HEADER_SIZE = offsetof(struct os_area_db, _db_data), 531 INDEX_64_COUNT = 64, 532 VALUES_64_COUNT = 57, 533 INDEX_32_COUNT = 64, 534 VALUES_32_COUNT = 57, 535 INDEX_16_COUNT = 64, 536 VALUES_16_COUNT = 57, 537 }; 538 539 memset(db, 0, sizeof(struct os_area_db)); 540 541 memcpy(db->magic_num, OS_AREA_DB_MAGIC_NUM, sizeof(db->magic_num)); 542 db->version = 1; 543 db->index_64 = HEADER_SIZE; 544 db->count_64 = VALUES_64_COUNT; 545 db->index_32 = HEADER_SIZE 546 + INDEX_64_COUNT * sizeof(struct db_index) 547 + VALUES_64_COUNT * sizeof(u64); 548 db->count_32 = VALUES_32_COUNT; 549 db->index_16 = HEADER_SIZE 550 + INDEX_64_COUNT * sizeof(struct db_index) 551 + VALUES_64_COUNT * sizeof(u64) 552 + INDEX_32_COUNT * sizeof(struct db_index) 553 + VALUES_32_COUNT * sizeof(u32); 554 db->count_16 = VALUES_16_COUNT; 555 556 /* Rules to check db layout. */ 557 558 BUILD_BUG_ON(sizeof(struct db_index) != 1); 559 BUILD_BUG_ON(sizeof(struct os_area_db) != 2 * OS_AREA_SEGMENT_SIZE); 560 BUILD_BUG_ON(INDEX_64_COUNT & 0x7); 561 BUILD_BUG_ON(VALUES_64_COUNT > INDEX_64_COUNT); 562 BUILD_BUG_ON(INDEX_32_COUNT & 0x7); 563 BUILD_BUG_ON(VALUES_32_COUNT > INDEX_32_COUNT); 564 BUILD_BUG_ON(INDEX_16_COUNT & 0x7); 565 BUILD_BUG_ON(VALUES_16_COUNT > INDEX_16_COUNT); 566 BUILD_BUG_ON(HEADER_SIZE 567 + INDEX_64_COUNT * sizeof(struct db_index) 568 + VALUES_64_COUNT * sizeof(u64) 569 + INDEX_32_COUNT * sizeof(struct db_index) 570 + VALUES_32_COUNT * sizeof(u32) 571 + INDEX_16_COUNT * sizeof(struct db_index) 572 + VALUES_16_COUNT * sizeof(u16) 573 > sizeof(struct os_area_db)); 574 } 575 576 /** 577 * update_flash_db - Helper for os_area_queue_work_handler. 578 * 579 */ 580 581 static void __maybe_unused update_flash_db(void) 582 { 583 int result; 584 int file; 585 off_t offset; 586 ssize_t count; 587 static const unsigned int buf_len = 8 * OS_AREA_SEGMENT_SIZE; 588 const struct os_area_header *header; 589 struct os_area_db* db; 590 591 /* Read in header and db from flash. */ 592 593 file = sys_open("/dev/ps3flash", O_RDWR, 0); 594 595 if (file < 0) { 596 pr_debug("%s:%d sys_open failed\n", __func__, __LINE__); 597 goto fail_open; 598 } 599 600 header = kmalloc(buf_len, GFP_KERNEL); 601 602 if (!header) { 603 pr_debug("%s:%d kmalloc failed\n", __func__, __LINE__); 604 goto fail_malloc; 605 } 606 607 offset = sys_lseek(file, 0, SEEK_SET); 608 609 if (offset != 0) { 610 pr_debug("%s:%d sys_lseek failed\n", __func__, __LINE__); 611 goto fail_header_seek; 612 } 613 614 count = sys_read(file, (char __user *)header, buf_len); 615 616 result = count < OS_AREA_SEGMENT_SIZE || verify_header(header) 617 || count < header->db_area_offset * OS_AREA_SEGMENT_SIZE; 618 619 if (result) { 620 pr_debug("%s:%d verify_header failed\n", __func__, __LINE__); 621 dump_header(header); 622 goto fail_header; 623 } 624 625 /* Now got a good db offset and some maybe good db data. */ 626 627 db = (void*)header + header->db_area_offset * OS_AREA_SEGMENT_SIZE; 628 629 result = db_verify(db); 630 631 if (result) { 632 printk(KERN_NOTICE "%s:%d: Verify of flash database failed, " 633 "formatting.\n", __func__, __LINE__); 634 dump_db(db); 635 os_area_db_init(db); 636 } 637 638 /* Now got good db data. */ 639 640 db_set_64(db, &os_area_db_id_rtc_diff, saved_params.rtc_diff); 641 642 offset = sys_lseek(file, header->db_area_offset * OS_AREA_SEGMENT_SIZE, 643 SEEK_SET); 644 645 if (offset != header->db_area_offset * OS_AREA_SEGMENT_SIZE) { 646 pr_debug("%s:%d sys_lseek failed\n", __func__, __LINE__); 647 goto fail_db_seek; 648 } 649 650 count = sys_write(file, (const char __user *)db, 651 sizeof(struct os_area_db)); 652 653 if (count < sizeof(struct os_area_db)) { 654 pr_debug("%s:%d sys_write failed\n", __func__, __LINE__); 655 } 656 657 fail_db_seek: 658 fail_header: 659 fail_header_seek: 660 kfree(header); 661 fail_malloc: 662 sys_close(file); 663 fail_open: 664 return; 665 } 666 667 /** 668 * os_area_queue_work_handler - Asynchronous write handler. 669 * 670 * An asynchronous write for flash memory and the device tree. Do not 671 * call directly, use os_area_queue_work(). 672 */ 673 674 static void os_area_queue_work_handler(struct work_struct *work) 675 { 676 struct device_node *node; 677 678 pr_debug(" -> %s:%d\n", __func__, __LINE__); 679 680 node = of_find_node_by_path("/"); 681 682 if (node) { 683 os_area_set_property(node, &property_rtc_diff); 684 of_node_put(node); 685 } else 686 pr_debug("%s:%d of_find_node_by_path failed\n", 687 __func__, __LINE__); 688 689 #if defined(CONFIG_PS3_FLASH) || defined(CONFIG_PS3_FLASH_MODULE) 690 update_flash_db(); 691 #else 692 printk(KERN_WARNING "%s:%d: No flash rom driver configured.\n", 693 __func__, __LINE__); 694 #endif 695 pr_debug(" <- %s:%d\n", __func__, __LINE__); 696 } 697 698 static void os_area_queue_work(void) 699 { 700 static DECLARE_WORK(q, os_area_queue_work_handler); 701 702 wmb(); 703 schedule_work(&q); 704 } 705 706 /** 707 * ps3_os_area_save_params - Copy data from os area mirror to @saved_params. 708 * 709 * For the convenience of the guest the HV makes a copy of the os area in 710 * flash to a high address in the boot memory region and then puts that RAM 711 * address and the byte count into the repository for retrieval by the guest. 712 * We copy the data we want into a static variable and allow the memory setup 713 * by the HV to be claimed by the lmb manager. 714 * 715 * The os area mirror will not be available to a second stage kernel, and 716 * the header verify will fail. In this case, the saved_params values will 717 * be set from flash memory or the passed in device tree in ps3_os_area_init(). 718 */ 719 720 void __init ps3_os_area_save_params(void) 721 { 722 int result; 723 u64 lpar_addr; 724 unsigned int size; 725 struct os_area_header *header; 726 struct os_area_params *params; 727 struct os_area_db *db; 728 729 pr_debug(" -> %s:%d\n", __func__, __LINE__); 730 731 result = ps3_repository_read_boot_dat_info(&lpar_addr, &size); 732 733 if (result) { 734 pr_debug("%s:%d ps3_repository_read_boot_dat_info failed\n", 735 __func__, __LINE__); 736 return; 737 } 738 739 header = (struct os_area_header *)__va(lpar_addr); 740 params = (struct os_area_params *)__va(lpar_addr 741 + OS_AREA_SEGMENT_SIZE); 742 743 result = verify_header(header); 744 745 if (result) { 746 /* Second stage kernels exit here. */ 747 pr_debug("%s:%d verify_header failed\n", __func__, __LINE__); 748 dump_header(header); 749 return; 750 } 751 752 db = (struct os_area_db *)__va(lpar_addr 753 + header->db_area_offset * OS_AREA_SEGMENT_SIZE); 754 755 dump_header(header); 756 dump_params(params); 757 dump_db(db); 758 759 result = db_verify(db) || db_get_rtc_diff(db, &saved_params.rtc_diff); 760 if (result) 761 saved_params.rtc_diff = params->rtc_diff ? params->rtc_diff 762 : SECONDS_FROM_1970_TO_2000; 763 saved_params.av_multi_out = params->av_multi_out; 764 saved_params.valid = 1; 765 766 memset(header, 0, sizeof(*header)); 767 768 pr_debug(" <- %s:%d\n", __func__, __LINE__); 769 } 770 771 /** 772 * ps3_os_area_init - Setup os area device tree properties as needed. 773 */ 774 775 void __init ps3_os_area_init(void) 776 { 777 struct device_node *node; 778 779 pr_debug(" -> %s:%d\n", __func__, __LINE__); 780 781 node = of_find_node_by_path("/"); 782 783 if (!saved_params.valid && node) { 784 /* Second stage kernels should have a dt entry. */ 785 os_area_get_property(node, &property_rtc_diff); 786 os_area_get_property(node, &property_av_multi_out); 787 } 788 789 if(!saved_params.rtc_diff) 790 saved_params.rtc_diff = SECONDS_FROM_1970_TO_2000; 791 792 if (node) { 793 os_area_set_property(node, &property_rtc_diff); 794 os_area_set_property(node, &property_av_multi_out); 795 of_node_put(node); 796 } else 797 pr_debug("%s:%d of_find_node_by_path failed\n", 798 __func__, __LINE__); 799 800 pr_debug(" <- %s:%d\n", __func__, __LINE__); 801 } 802 803 /** 804 * ps3_os_area_get_rtc_diff - Returns the rtc diff value. 805 */ 806 807 u64 ps3_os_area_get_rtc_diff(void) 808 { 809 return saved_params.rtc_diff; 810 } 811 EXPORT_SYMBOL_GPL(ps3_os_area_get_rtc_diff); 812 813 /** 814 * ps3_os_area_set_rtc_diff - Set the rtc diff value. 815 * 816 * An asynchronous write is needed to support writing updates from 817 * the timer interrupt context. 818 */ 819 820 void ps3_os_area_set_rtc_diff(u64 rtc_diff) 821 { 822 if (saved_params.rtc_diff != rtc_diff) { 823 saved_params.rtc_diff = rtc_diff; 824 os_area_queue_work(); 825 } 826 } 827 EXPORT_SYMBOL_GPL(ps3_os_area_set_rtc_diff); 828 829 /** 830 * ps3_os_area_get_av_multi_out - Returns the default video mode. 831 */ 832 833 enum ps3_param_av_multi_out ps3_os_area_get_av_multi_out(void) 834 { 835 return saved_params.av_multi_out; 836 } 837 EXPORT_SYMBOL_GPL(ps3_os_area_get_av_multi_out); 838