glue.c revision 182732
1/*- 2 * Copyright (c) 2007-2008 Semihalf, Rafal Jaworowski <raj@semihalf.com> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27#include <sys/cdefs.h> 28__FBSDID("$FreeBSD: head/sys/boot/uboot/lib/glue.c 182732 2008-09-03 17:48:41Z raj $"); 29 30#include <stand.h> 31#include "api_public.h" 32#include "glue.h" 33 34#define DEBUG 35#undef DEBUG 36 37#ifdef DEBUG 38#define debugf(fmt, args...) do { printf("%s(): ", __func__); printf(fmt,##args); } while (0) 39#else 40#define debugf(fmt, args...) 41#endif 42 43/* Some random address used by U-Boot. */ 44extern long uboot_address; 45 46/* crc32 stuff stolen from lib/libdisk/write_ia64_disk.c */ 47static uint32_t crc32_tab[] = { 48 0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f, 49 0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988, 50 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, 0x1db71064, 0x6ab020f2, 51 0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, 52 0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9, 53 0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172, 54 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, 0x35b5a8fa, 0x42b2986c, 55 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59, 56 0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 57 0xcfba9599, 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924, 58 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190, 0x01db7106, 59 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433, 60 0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, 61 0x91646c97, 0xe6635c01, 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 62 0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950, 63 0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65, 64 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7, 65 0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0, 66 0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa, 67 0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f, 68 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81, 69 0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a, 70 0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, 0xe3630b12, 0x94643b84, 71 0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1, 72 0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb, 73 0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc, 74 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, 0xd6d6a3e8, 0xa1d1937e, 75 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b, 76 0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 77 0x316e8eef, 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236, 78 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe, 0xb2bd0b28, 79 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d, 80 0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f, 81 0x72076785, 0x05005713, 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, 82 0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242, 83 0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777, 84 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69, 85 0x616bffd3, 0x166ccf45, 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2, 86 0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc, 87 0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9, 88 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693, 89 0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94, 90 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d 91}; 92 93static uint32_t 94crc32(const void *buf, size_t size) 95{ 96 const uint8_t *p; 97 uint32_t crc; 98 99 p = buf; 100 crc = ~0U; 101 102 while (size--) 103 crc = crc32_tab[(crc ^ *p++) & 0xFF] ^ (crc >> 8); 104 105 return (crc ^ ~0U); 106} 107 108 109static int 110valid_sig(struct api_signature *sig) 111{ 112 uint32_t checksum; 113 struct api_signature s; 114 115 if (sig == NULL) 116 return (0); 117 /* 118 * Clear the checksum field (in the local copy) so as to calculate the 119 * CRC with the same initial contents as at the time when the sig was 120 * produced 121 */ 122 s = *sig; 123 s.checksum = 0; 124 125 checksum = crc32((void *)&s, sizeof(struct api_signature)); 126 127 if (checksum != sig->checksum) 128 return (0); 129 130 return (1); 131} 132 133/* 134 * Searches for the U-Boot API signature 135 * 136 * returns 1/0 depending on found/not found result 137 */ 138int 139api_search_sig(struct api_signature **sig) 140{ 141 unsigned char *sp, *spend; 142 143 if (sig == NULL) 144 return (0); 145 146 if (uboot_address == 0) 147 uboot_address = 255 * 1024 * 1024; 148 149 sp = (void *)(uboot_address & ~0x000fffff); 150 spend = sp + 0x00100000 - API_SIG_MAGLEN; 151 while (sp < spend) { 152 if (!bcmp(sp, API_SIG_MAGIC, API_SIG_MAGLEN)) { 153 *sig = (struct api_signature *)sp; 154 if (valid_sig(*sig)) 155 return (1); 156 } 157 sp += API_SIG_MAGLEN; 158 } 159 160 *sig = NULL; 161 return (0); 162} 163 164/**************************************** 165 * 166 * console 167 * 168 ****************************************/ 169 170int 171ub_getc(void) 172{ 173 int c; 174 175 if (!syscall(API_GETC, NULL, (uint32_t)&c)) 176 return (-1); 177 178 return (c); 179} 180 181int 182ub_tstc(void) 183{ 184 int t; 185 186 if (!syscall(API_TSTC, NULL, (uint32_t)&t)) 187 return (-1); 188 189 return (t); 190} 191 192void 193ub_putc(char c) 194{ 195 196 syscall(API_PUTC, NULL, (uint32_t)&c); 197} 198 199void 200ub_puts(const char *s) 201{ 202 203 syscall(API_PUTS, NULL, (uint32_t)s); 204} 205 206/**************************************** 207 * 208 * system 209 * 210 ****************************************/ 211 212void 213ub_reset(void) 214{ 215 216 syscall(API_RESET, NULL); 217} 218 219 220#define MR_MAX 5 221static struct mem_region mr[MR_MAX]; 222static struct sys_info si; 223 224struct sys_info * 225ub_get_sys_info(void) 226{ 227 int err = 0; 228 229 memset(&si, 0, sizeof(struct sys_info)); 230 si.mr = mr; 231 si.mr_no = MR_MAX; 232 memset(&mr, 0, sizeof(mr)); 233 234 if (!syscall(API_GET_SYS_INFO, &err, (u_int32_t)&si)) 235 return (NULL); 236 237 return ((err) ? NULL : &si); 238} 239 240 241/**************************************** 242 * 243 * timing 244 * 245 ****************************************/ 246 247void 248ub_udelay(unsigned long usec) 249{ 250 251 syscall(API_UDELAY, NULL, &usec); 252} 253 254unsigned long 255ub_get_timer(unsigned long base) 256{ 257 unsigned long cur; 258 259 if (!syscall(API_GET_TIMER, NULL, &cur, &base)) 260 return (0); 261 262 return (cur); 263} 264 265 266/**************************************************************************** 267 * 268 * devices 269 * 270 * Devices are identified by handles: numbers 0, 1, 2, ..., MAX_DEVS-1 271 * 272 ***************************************************************************/ 273 274#define MAX_DEVS 6 275 276static struct device_info devices[MAX_DEVS]; 277 278struct device_info * 279ub_dev_get(int i) 280{ 281 282 return ((i < 0 || i >= MAX_DEVS) ? NULL : &devices[i]); 283} 284 285/* 286 * Enumerates the devices: fills out device_info elements in the devices[] 287 * array. 288 * 289 * returns: number of devices found 290 */ 291int 292ub_dev_enum(void) 293{ 294 struct device_info *di; 295 int n = 0; 296 297 memset(&devices, 0, sizeof(struct device_info) * MAX_DEVS); 298 di = &devices[0]; 299 300 if (!syscall(API_DEV_ENUM, NULL, di)) 301 return (0); 302 303 while (di->cookie != NULL) { 304 305 if (++n >= MAX_DEVS) 306 break; 307 308 /* take another device_info */ 309 di++; 310 311 /* pass on the previous cookie */ 312 di->cookie = devices[n - 1].cookie; 313 314 if (!syscall(API_DEV_ENUM, NULL, di)) 315 return (0); 316 } 317 318 return (n); 319} 320 321 322/* 323 * handle: 0-based id of the device 324 * 325 * returns: 0 when OK, err otherwise 326 */ 327int 328ub_dev_open(int handle) 329{ 330 struct device_info *di; 331 int err = 0; 332 333 if (handle < 0 || handle >= MAX_DEVS) 334 return (API_EINVAL); 335 336 di = &devices[handle]; 337 if (!syscall(API_DEV_OPEN, &err, di)) 338 return (-1); 339 340 return (err); 341} 342 343int 344ub_dev_close(int handle) 345{ 346 struct device_info *di; 347 348 if (handle < 0 || handle >= MAX_DEVS) 349 return (API_EINVAL); 350 351 di = &devices[handle]; 352 if (!syscall(API_DEV_CLOSE, NULL, di)) 353 return (-1); 354 355 return (0); 356} 357 358/* 359 * Validates device for read/write, it has to: 360 * 361 * - have sane handle 362 * - be opened 363 * 364 * returns: 0/1 accordingly 365 */ 366static int 367dev_valid(int handle) 368{ 369 370 if (handle < 0 || handle >= MAX_DEVS) 371 return (0); 372 373 if (devices[handle].state != DEV_STA_OPEN) 374 return (0); 375 376 return (1); 377} 378 379static int 380dev_stor_valid(int handle) 381{ 382 383 if (!dev_valid(handle)) 384 return (0); 385 386 if (!(devices[handle].type & DEV_TYP_STOR)) 387 return (0); 388 389 return (1); 390} 391 392int 393ub_dev_read(int handle, void *buf, lbasize_t len, lbastart_t start) 394{ 395 struct device_info *di; 396 lbasize_t act_len; 397 int err = 0; 398 399 if (!dev_stor_valid(handle)) 400 return (API_ENODEV); 401 402 di = &devices[handle]; 403 if (!syscall(API_DEV_READ, &err, di, buf, &len, &start, &act_len)) 404 return (-1); 405 406 if (err) 407 return (err); 408 409 if (act_len != len) 410 return (API_EIO); 411 412 return (0); 413} 414 415static int 416dev_net_valid(int handle) 417{ 418 419 if (!dev_valid(handle)) 420 return (0); 421 422 if (devices[handle].type != DEV_TYP_NET) 423 return (0); 424 425 return (1); 426} 427 428int 429ub_dev_recv(int handle, void *buf, int len) 430{ 431 struct device_info *di; 432 int err = 0, act_len; 433 434 if (!dev_net_valid(handle)) 435 return (API_ENODEV); 436 437 di = &devices[handle]; 438 if (!syscall(API_DEV_READ, &err, di, buf, &len, &act_len)) 439 return (-1); 440 441 if (err) 442 return (-1); 443 444 return (act_len); 445} 446 447int 448ub_dev_send(int handle, void *buf, int len) 449{ 450 struct device_info *di; 451 int err = 0; 452 453 if (!dev_net_valid(handle)) 454 return (API_ENODEV); 455 456 di = &devices[handle]; 457 if (!syscall(API_DEV_WRITE, &err, di, buf, &len)) 458 return (-1); 459 460 return (err); 461} 462 463static char * 464ub_stor_type(int type) 465{ 466 467 if (type & DT_STOR_IDE) 468 return ("IDE"); 469 470 if (type & DT_STOR_SCSI) 471 return ("SCSI"); 472 473 if (type & DT_STOR_USB) 474 return ("USB"); 475 476 if (type & DT_STOR_MMC); 477 return ("MMC"); 478 479 return ("Unknown"); 480} 481 482char * 483ub_mem_type(int flags) 484{ 485 486 switch(flags & 0x000F) { 487 case MR_ATTR_FLASH: 488 return ("FLASH"); 489 case MR_ATTR_DRAM: 490 return ("DRAM"); 491 case MR_ATTR_SRAM: 492 return ("SRAM"); 493 default: 494 return ("Unknown"); 495 } 496} 497 498void 499ub_dump_di(int handle) 500{ 501 struct device_info *di = ub_dev_get(handle); 502 int i; 503 504 printf("device info (%d):\n", handle); 505 printf(" cookie\t= 0x%08x\n", (uint32_t)di->cookie); 506 printf(" type\t\t= 0x%08x\n", di->type); 507 508 if (di->type == DEV_TYP_NET) { 509 printf(" hwaddr\t= "); 510 for (i = 0; i < 6; i++) 511 printf("%02x ", di->di_net.hwaddr[i]); 512 513 printf("\n"); 514 515 } else if (di->type & DEV_TYP_STOR) { 516 printf(" type\t\t= %s\n", ub_stor_type(di->type)); 517 printf(" blk size\t\t= %ld\n", di->di_stor.block_size); 518 printf(" blk count\t\t= %ld\n", di->di_stor.block_count); 519 } 520} 521 522void 523ub_dump_si(struct sys_info *si) 524{ 525 int i; 526 527 printf("sys info:\n"); 528 printf(" clkbus\t= %ld MHz\n", si->clk_bus / 1000 / 1000); 529 printf(" clkcpu\t= %ld MHz\n", si->clk_cpu / 1000 / 1000); 530 printf(" bar\t\t= 0x%08lx\n", si->bar); 531 532 printf("---\n"); 533 for (i = 0; i < si->mr_no; i++) { 534 if (si->mr[i].flags == 0) 535 break; 536 537 printf(" start\t= 0x%08lx\n", si->mr[i].start); 538 printf(" size\t= 0x%08lx\n", si->mr[i].size); 539 printf(" type\t= %s\n", ub_mem_type(si->mr[i].flags)); 540 printf("---\n"); 541 } 542} 543 544/**************************************** 545 * 546 * env vars 547 * 548 ****************************************/ 549 550char * 551ub_env_get(const char *name) 552{ 553 char *value; 554 555 if (!syscall(API_ENV_GET, NULL, (uint32_t)name, (uint32_t)&value)) 556 return (NULL); 557 558 return (value); 559} 560 561void 562ub_env_set(const char *name, char *value) 563{ 564 565 syscall(API_ENV_SET, NULL, (uint32_t)name, (uint32_t)value); 566} 567 568 569static char env_name[256]; 570 571const char * 572ub_env_enum(const char *last) 573{ 574 const char *env, *str; 575 int i; 576 577 env = NULL; 578 579 /* 580 * It's OK to pass only the name piece as last (and not the whole 581 * 'name=val' string), since the API_ENUM_ENV call uses envmatch() 582 * internally, which handles such case 583 */ 584 if (!syscall(API_ENV_ENUM, NULL, (uint32_t)last, (uint32_t)&env)) 585 return (NULL); 586 587 if (!env) 588 /* no more env. variables to enumerate */ 589 return (NULL); 590#if 0 591 if (last && strncmp(env, last, strlen(last)) == 0); 592 /* error, trying to enumerate non existing env. variable */ 593 return NULL; 594#endif 595 596 /* next enumerated env var */ 597 memset(env_name, 0, 256); 598 for (i = 0, str = env; *str != '=' && *str != '\0';) 599 env_name[i++] = *str++; 600 601 env_name[i] = '\0'; 602 603 return (env_name); 604} 605