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