arch/arm/lib/board.c

   1 /*
   2  * (C) Copyright 2002-2006
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * (C) Copyright 2002
   6  * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
   7  * Marius Groeger <mgroeger@sysgo.de>
   8  *
   9  * See file CREDITS for list of people who contributed to this
  10  * project.
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License as
  14  * published by the Free Software Foundation; either version 2 of
  15  * the License, or (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  25  * MA 02111-1307 USA
  26  */
  27
  28 /*
  29  * To match the U-Boot user interface on ARM platforms to the U-Boot
  30  * standard (as on PPC platforms), some messages with debug character
  31  * are removed from the default U-Boot build.
  32  *
  33  * Define DEBUG here if you want additional info as shown below
  34  * printed upon startup:
  35  *
  36  * U-Boot code: 00F00000 -> 00F3C774  BSS: -> 00FC3274
  37  * IRQ Stack: 00ebff7c
  38  * FIQ Stack: 00ebef7c
  39  */
  40
  41 #include <common.h>
  42 #include <command.h>
  43 #include <environment.h>
  44 #include <malloc.h>
  45 #include <stdio_dev.h>
  46 #include <version.h>
  47 #include <net.h>
  48 #include <serial.h>
  49 #include <nand.h>
  50 #include <onenand_uboot.h>
  51 #include <mmc.h>
  52 #include <libfdt.h>
  53 #include <fdtdec.h>
  54 #include <post.h>
  55 #include <logbuff.h>
  56
  57 #ifdef CONFIG_BITBANGMII
  58 #include <miiphy.h>
  59 #endif
  60
  61 DECLARE_GLOBAL_DATA_PTR;
  62
  63 ulong monitor_flash_len;
  64
  65 #ifdef CONFIG_HAS_DATAFLASH
  66 extern int  AT91F_DataflashInit(void);
  67 extern void dataflash_print_info(void);
  68 #endif
  69
  70 #if defined(CONFIG_HARD_I2C) || \
  71     defined(CONFIG_SOFT_I2C)
  72 #include <i2c.h>
  73 #endif
  74
  75 /************************************************************************
  76  * Coloured LED functionality
  77  ************************************************************************
  78  * May be supplied by boards if desired
  79  */
  80 inline void __coloured_LED_init(void) {}
  81 void coloured_LED_init(void)
  82         __attribute__((weak, alias("__coloured_LED_init")));
  83 inline void __red_led_on(void) {}
  84 void red_led_on(void) __attribute__((weak, alias("__red_led_on")));
  85 inline void __red_led_off(void) {}
  86 void red_led_off(void) __attribute__((weak, alias("__red_led_off")));
  87 inline void __green_led_on(void) {}
  88 void green_led_on(void) __attribute__((weak, alias("__green_led_on")));
  89 inline void __green_led_off(void) {}
  90 void green_led_off(void) __attribute__((weak, alias("__green_led_off")));
  91 inline void __yellow_led_on(void) {}
  92 void yellow_led_on(void) __attribute__((weak, alias("__yellow_led_on")));
  93 inline void __yellow_led_off(void) {}
  94 void yellow_led_off(void) __attribute__((weak, alias("__yellow_led_off")));
  95 inline void __blue_led_on(void) {}
  96 void blue_led_on(void) __attribute__((weak, alias("__blue_led_on")));
  97 inline void __blue_led_off(void) {}
  98 void blue_led_off(void) __attribute__((weak, alias("__blue_led_off")));
  99
 100 /*
 101  ************************************************************************
 102  * Init Utilities                                                       *
 103  ************************************************************************
 104  * Some of this code should be moved into the core functions,
 105  * or dropped completely,
 106  * but let's get it working (again) first...
 107  */
 108
 109 #if defined(CONFIG_ARM_DCC) && !defined(CONFIG_BAUDRATE)
 110 #define CONFIG_BAUDRATE 115200
 111 #endif
 112
 113 static int init_baudrate(void)
 114 {
 115         gd->baudrate = getenv_ulong("baudrate", 10, CONFIG_BAUDRATE);
 116         return 0;
 117 }
 118
 119 static int display_banner(void)
 120 {
 121         printf("\n\n%s\n\n", version_string);
 122         debug("U-Boot code: %08lX -> %08lX  BSS: -> %08lX\n",
 123                _TEXT_BASE,
 124                _bss_start_ofs + _TEXT_BASE, _bss_end_ofs + _TEXT_BASE);
 125 #ifdef CONFIG_MODEM_SUPPORT
 126         debug("Modem Support enabled\n");
 127 #endif
 128 #ifdef CONFIG_USE_IRQ
 129         debug("IRQ Stack: %08lx\n", IRQ_STACK_START);
 130         debug("FIQ Stack: %08lx\n", FIQ_STACK_START);
 131 #endif
 132
 133         return (0);
 134 }
 135
 136 /*
 137  * WARNING: this code looks "cleaner" than the PowerPC version, but
 138  * has the disadvantage that you either get nothing, or everything.
 139  * On PowerPC, you might see "DRAM: " before the system hangs - which
 140  * gives a simple yet clear indication which part of the
 141  * initialization if failing.
 142  */
 143 static int display_dram_config(void)
 144 {
 145         int i;
 146
 147 #ifdef DEBUG
 148         puts("RAM Configuration:\n");
 149
 150         for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
 151                 printf("Bank #%d: %08lx ", i, gd->bd->bi_dram[i].start);
 152                 print_size(gd->bd->bi_dram[i].size, "\n");
 153         }
 154 #else
 155         ulong size = 0;
 156
 157         for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++)
 158                 size += gd->bd->bi_dram[i].size;
 159
 160         puts("DRAM:  ");
 161         print_size(size, "\n");
 162 #endif
 163
 164         return (0);
 165 }
 166
 167 #if defined(CONFIG_HARD_I2C) || defined(CONFIG_SOFT_I2C)
 168 static int init_func_i2c(void)
 169 {
 170         puts("I2C:   ");
 171         i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
 172         puts("ready\n");
 173         return (0);
 174 }
 175 #endif
 176
 177 #if defined(CONFIG_CMD_PCI) || defined (CONFIG_PCI)
 178 #include <pci.h>
 179 static int arm_pci_init(void)
 180 {
 181         pci_init();
 182         return 0;
 183 }
 184 #endif /* CONFIG_CMD_PCI || CONFIG_PCI */
 185
 186 /*
 187  * Breathe some life into the board...
 188  *
 189  * Initialize a serial port as console, and carry out some hardware
 190  * tests.
 191  *
 192  * The first part of initialization is running from Flash memory;
 193  * its main purpose is to initialize the RAM so that we
 194  * can relocate the monitor code to RAM.
 195  */
 196
 197 /*
 198  * All attempts to come up with a "common" initialization sequence
 199  * that works for all boards and architectures failed: some of the
 200  * requirements are just _too_ different. To get rid of the resulting
 201  * mess of board dependent #ifdef'ed code we now make the whole
 202  * initialization sequence configurable to the user.
 203  *
 204  * The requirements for any new initalization function is simple: it
 205  * receives a pointer to the "global data" structure as it's only
 206  * argument, and returns an integer return code, where 0 means
 207  * "continue" and != 0 means "fatal error, hang the system".
 208  */
 209 typedef int (init_fnc_t) (void);
 210
 211 int print_cpuinfo(void);
 212
 213 void __dram_init_banksize(void)
 214 {
 215         gd->bd->bi_dram[0].start = CONFIG_SYS_SDRAM_BASE;
 216         gd->bd->bi_dram[0].size =  gd->ram_size;
 217 }
 218 void dram_init_banksize(void)
 219         __attribute__((weak, alias("__dram_init_banksize")));
 220
 221 int __arch_cpu_init(void)
 222 {
 223         return 0;
 224 }
 225 int arch_cpu_init(void)
 226         __attribute__((weak, alias("__arch_cpu_init")));
 227
 228 int __power_init_board(void)
 229 {
 230         return 0;
 231 }
 232 int power_init_board(void)
 233         __attribute__((weak, alias("__power_init_board")));
 234
 235         /* Record the board_init_f() bootstage (after arch_cpu_init()) */
 236 static int mark_bootstage(void)
 237 {
 238         bootstage_mark_name(BOOTSTAGE_ID_START_UBOOT_F, "board_init_f");
 239
 240         return 0;
 241 }
 242
 243 init_fnc_t *init_sequence[] = {
 244         arch_cpu_init,          /* basic arch cpu dependent setup */
 245         mark_bootstage,
 246 #ifdef CONFIG_OF_CONTROL
 247         fdtdec_check_fdt,
 248 #endif
 249 #if defined(CONFIG_BOARD_EARLY_INIT_F)
 250         board_early_init_f,
 251 #endif
 252         timer_init,             /* initialize timer */
 253 #ifdef CONFIG_BOARD_POSTCLK_INIT
 254         board_postclk_init,
 255 #endif
 256 #ifdef CONFIG_FSL_ESDHC
 257         get_clocks,
 258 #endif
 259         env_init,               /* initialize environment */
 260         init_baudrate,          /* initialze baudrate settings */
 261         serial_init,            /* serial communications setup */
 262         console_init_f,         /* stage 1 init of console */
 263         display_banner,         /* say that we are here */
 264 #if defined(CONFIG_DISPLAY_CPUINFO)
 265         print_cpuinfo,          /* display cpu info (and speed) */
 266 #endif
 267 #if defined(CONFIG_DISPLAY_BOARDINFO)
 268         checkboard,             /* display board info */
 269 #endif
 270 #if defined(CONFIG_HARD_I2C) || defined(CONFIG_SOFT_I2C)
 271         init_func_i2c,
 272 #endif
 273         dram_init,              /* configure available RAM banks */
 274         NULL,
 275 };
 276
 277 void board_init_f(ulong bootflag)
 278 {
 279         bd_t *bd;
 280         init_fnc_t **init_fnc_ptr;
 281         gd_t *id;
 282         ulong addr, addr_sp;
 283 #ifdef CONFIG_PRAM
 284         ulong reg;
 285 #endif
 286         void *new_fdt = NULL;
 287         size_t fdt_size = 0;
 288
 289         memset((void *)gd, 0, sizeof(gd_t));
 290
 291         gd->mon_len = _bss_end_ofs;
 292 #ifdef CONFIG_OF_EMBED
 293         /* Get a pointer to the FDT */
 294         gd->fdt_blob = _binary_dt_dtb_start;
 295 #elif defined CONFIG_OF_SEPARATE
 296         /* FDT is at end of image */
 297         gd->fdt_blob = (void *)(_end_ofs + _TEXT_BASE);
 298 #endif
 299         /* Allow the early environment to override the fdt address */
 300         gd->fdt_blob = (void *)getenv_ulong("fdtcontroladdr", 16,
 301                                                 (uintptr_t)gd->fdt_blob);
 302
 303         for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
 304                 if ((*init_fnc_ptr)() != 0) {
 305                         hang ();
 306                 }
 307         }
 308
 309 #ifdef CONFIG_OF_CONTROL
 310         /* For now, put this check after the console is ready */
 311         if (fdtdec_prepare_fdt()) {
 312                 panic("** CONFIG_OF_CONTROL defined but no FDT - please see "
 313                         "doc/README.fdt-control");
 314         }
 315 #endif
 316
 317         debug("monitor len: %08lX\n", gd->mon_len);
 318         /*
 319          * Ram is setup, size stored in gd !!
 320          */
 321         debug("ramsize: %08lX\n", gd->ram_size);
 322 #if defined(CONFIG_SYS_MEM_TOP_HIDE)
 323         /*
 324          * Subtract specified amount of memory to hide so that it won't
 325          * get "touched" at all by U-Boot. By fixing up gd->ram_size
 326          * the Linux kernel should now get passed the now "corrected"
 327          * memory size and won't touch it either. This should work
 328          * for arch/ppc and arch/powerpc. Only Linux board ports in
 329          * arch/powerpc with bootwrapper support, that recalculate the
 330          * memory size from the SDRAM controller setup will have to
 331          * get fixed.
 332          */
 333         gd->ram_size -= CONFIG_SYS_MEM_TOP_HIDE;
 334 #endif
 335
 336         addr = CONFIG_SYS_SDRAM_BASE + gd->ram_size;
 337
 338 #ifdef CONFIG_LOGBUFFER
 339 #ifndef CONFIG_ALT_LB_ADDR
 340         /* reserve kernel log buffer */
 341         addr -= (LOGBUFF_RESERVE);
 342         debug("Reserving %dk for kernel logbuffer at %08lx\n", LOGBUFF_LEN,
 343                 addr);
 344 #endif
 345 #endif
 346
 347 #ifdef CONFIG_PRAM
 348         /*
 349          * reserve protected RAM
 350          */
 351         reg = getenv_ulong("pram", 10, CONFIG_PRAM);
 352         addr -= (reg << 10);            /* size is in kB */
 353         debug("Reserving %ldk for protected RAM at %08lx\n", reg, addr);
 354 #endif /* CONFIG_PRAM */
 355
 356 #if !(defined(CONFIG_SYS_ICACHE_OFF) && defined(CONFIG_SYS_DCACHE_OFF))
 357         /* reserve TLB table */
 358         gd->tlb_size = 4096 * 4;
 359         addr -= gd->tlb_size;
 360
 361         /* round down to next 64 kB limit */
 362         addr &= ~(0x10000 - 1);
 363
 364         gd->tlb_addr = addr;
 365         debug("TLB table from %08lx to %08lx\n", addr, addr + gd->tlb_size);
 366 #endif
 367
 368         /* round down to next 4 kB limit */
 369         addr &= ~(4096 - 1);
 370         debug("Top of RAM usable for U-Boot at: %08lx\n", addr);
 371
 372 #ifdef CONFIG_LCD
 373 #ifdef CONFIG_FB_ADDR
 374         gd->fb_base = CONFIG_FB_ADDR;
 375 #else
 376         /* reserve memory for LCD display (always full pages) */
 377         addr = lcd_setmem(addr);
 378         gd->fb_base = addr;
 379 #endif /* CONFIG_FB_ADDR */
 380 #endif /* CONFIG_LCD */
 381
 382         /*
 383          * reserve memory for U-Boot code, data & bss
 384          * round down to next 4 kB limit
 385          */
 386         addr -= gd->mon_len;
 387         addr &= ~(4096 - 1);
 388
 389         debug("Reserving %ldk for U-Boot at: %08lx\n", gd->mon_len >> 10, addr);
 390
 391 #ifndef CONFIG_SPL_BUILD
 392         /*
 393          * reserve memory for malloc() arena
 394          */
 395         addr_sp = addr - TOTAL_MALLOC_LEN;
 396         debug("Reserving %dk for malloc() at: %08lx\n",
 397                         TOTAL_MALLOC_LEN >> 10, addr_sp);
 398         /*
 399          * (permanently) allocate a Board Info struct
 400          * and a permanent copy of the "global" data
 401          */
 402         addr_sp -= sizeof (bd_t);
 403         bd = (bd_t *) addr_sp;
 404         gd->bd = bd;
 405         debug("Reserving %zu Bytes for Board Info at: %08lx\n",
 406                         sizeof (bd_t), addr_sp);
 407
 408 #ifdef CONFIG_MACH_TYPE
 409         gd->bd->bi_arch_number = CONFIG_MACH_TYPE; /* board id for Linux */
 410 #endif
 411
 412         addr_sp -= sizeof (gd_t);
 413         id = (gd_t *) addr_sp;
 414         debug("Reserving %zu Bytes for Global Data at: %08lx\n",
 415                         sizeof (gd_t), addr_sp);
 416
 417 #if defined(CONFIG_OF_SEPARATE) && defined(CONFIG_OF_CONTROL)
 418         /*
 419          * If the device tree is sitting immediate above our image then we
 420          * must relocate it. If it is embedded in the data section, then it
 421          * will be relocated with other data.
 422          */
 423         if (gd->fdt_blob) {
 424                 fdt_size = ALIGN(fdt_totalsize(gd->fdt_blob) + 0x1000, 32);
 425
 426                 addr_sp -= fdt_size;
 427                 new_fdt = (void *)addr_sp;
 428                 debug("Reserving %zu Bytes for FDT at: %08lx\n",
 429                       fdt_size, addr_sp);
 430         }
 431 #endif
 432
 433         /* setup stackpointer for exeptions */
 434         gd->irq_sp = addr_sp;
 435 #ifdef CONFIG_USE_IRQ
 436         addr_sp -= (CONFIG_STACKSIZE_IRQ+CONFIG_STACKSIZE_FIQ);
 437         debug("Reserving %zu Bytes for IRQ stack at: %08lx\n",
 438                 CONFIG_STACKSIZE_IRQ+CONFIG_STACKSIZE_FIQ, addr_sp);
 439 #endif
 440         /* leave 3 words for abort-stack    */
 441         addr_sp -= 12;
 442
 443         /* 8-byte alignment for ABI compliance */
 444         addr_sp &= ~0x07;
 445 #else
 446         addr_sp += 128; /* leave 32 words for abort-stack   */
 447         gd->irq_sp = addr_sp;
 448 #endif
 449
 450         debug("New Stack Pointer is: %08lx\n", addr_sp);
 451
 452 #ifdef CONFIG_POST
 453         post_bootmode_init();
 454         post_run(NULL, POST_ROM | post_bootmode_get(0));
 455 #endif
 456
 457         gd->bd->bi_baudrate = gd->baudrate;
 458         /* Ram ist board specific, so move it to board code ... */
 459         dram_init_banksize();
 460         display_dram_config();  /* and display it */
 461
 462         gd->relocaddr = addr;
 463         gd->start_addr_sp = addr_sp;
 464         gd->reloc_off = addr - _TEXT_BASE;
 465         debug("relocation Offset is: %08lx\n", gd->reloc_off);
 466         if (new_fdt) {
 467                 memcpy(new_fdt, gd->fdt_blob, fdt_size);
 468                 gd->fdt_blob = new_fdt;
 469         }
 470         memcpy(id, (void *)gd, sizeof(gd_t));
 471 }
 472
 473 #if !defined(CONFIG_SYS_NO_FLASH)
 474 static char *failed = "*** failed ***\n";
 475 #endif
 476
 477 /*
 478  * Tell if it's OK to load the environment early in boot.
 479  *
 480  * If CONFIG_OF_CONFIG is defined, we'll check with the FDT to see
 481  * if this is OK (defaulting to saying it's not OK).
 482  *
 483  * NOTE: Loading the environment early can be a bad idea if security is
 484  *       important, since no verification is done on the environment.
 485  *
 486  * @return 0 if environment should not be loaded, !=0 if it is ok to load
 487  */
 488 static int should_load_env(void)
 489 {
 490 #ifdef CONFIG_OF_CONTROL
 491         return fdtdec_get_config_int(gd->fdt_blob, "load-environment", 0);
 492 #elif defined CONFIG_DELAY_ENVIRONMENT
 493         return 0;
 494 #else
 495         return 1;
 496 #endif
 497 }
 498
 499 #if defined(CONFIG_DISPLAY_BOARDINFO_LATE) && defined(CONFIG_OF_CONTROL)
 500 static void display_fdt_model(const void *blob)
 501 {
 502         const char *model;
 503
 504         model = (char *)fdt_getprop(blob, 0, "model", NULL);
 505         printf("Model: %s\n", model ? model : "<unknown>");
 506 }
 507 #endif
 508
 509 /************************************************************************
 510  *
 511  * This is the next part if the initialization sequence: we are now
 512  * running from RAM and have a "normal" C environment, i. e. global
 513  * data can be written, BSS has been cleared, the stack size in not
 514  * that critical any more, etc.
 515  *
 516  ************************************************************************
 517  */
 518
 519 void board_init_r(gd_t *id, ulong dest_addr)
 520 {
 521         ulong malloc_start;
 522 #if !defined(CONFIG_SYS_NO_FLASH)
 523         ulong flash_size;
 524 #endif
 525
 526         gd->flags |= GD_FLG_RELOC;      /* tell others: relocation done */
 527         bootstage_mark_name(BOOTSTAGE_ID_START_UBOOT_R, "board_init_r");
 528
 529         monitor_flash_len = _end_ofs;
 530
 531         /* Enable caches */
 532         enable_caches();
 533
 534         debug("monitor flash len: %08lX\n", monitor_flash_len);
 535         board_init();   /* Setup chipselects */
 536         /*
 537          * TODO: printing of the clock inforamtion of the board is now
 538          * implemented as part of bdinfo command. Currently only support for
 539          * davinci SOC's is added. Remove this check once all the board
 540          * implement this.
 541          */
 542 #ifdef CONFIG_CLOCKS
 543         set_cpu_clk_info(); /* Setup clock information */
 544 #endif
 545         serial_initialize();
 546
 547         debug("Now running in RAM - U-Boot at: %08lx\n", dest_addr);
 548
 549 #ifdef CONFIG_LOGBUFFER
 550         logbuff_init_ptrs();
 551 #endif
 552 #ifdef CONFIG_POST
 553         post_output_backlog();
 554 #endif
 555
 556         /* The Malloc area is immediately below the monitor copy in DRAM */
 557         malloc_start = dest_addr - TOTAL_MALLOC_LEN;
 558         mem_malloc_init (malloc_start, TOTAL_MALLOC_LEN);
 559
 560 #ifdef CONFIG_ARCH_EARLY_INIT_R
 561         arch_early_init_r();
 562 #endif
 563         power_init_board();
 564
 565 #if !defined(CONFIG_SYS_NO_FLASH)
 566         puts("Flash: ");
 567
 568         flash_size = flash_init();
 569         if (flash_size > 0) {
 570 # ifdef CONFIG_SYS_FLASH_CHECKSUM
 571                 print_size(flash_size, "");
 572                 /*
 573                  * Compute and print flash CRC if flashchecksum is set to 'y'
 574                  *
 575                  * NOTE: Maybe we should add some WATCHDOG_RESET()? XXX
 576                  */
 577                 if (getenv_yesno("flashchecksum") == 1) {
 578                         printf("  CRC: %08X", crc32(0,
 579                                 (const unsigned char *) CONFIG_SYS_FLASH_BASE,
 580                                 flash_size));
 581                 }
 582                 putc('\n');
 583 # else  /* !CONFIG_SYS_FLASH_CHECKSUM */
 584                 print_size(flash_size, "\n");
 585 # endif /* CONFIG_SYS_FLASH_CHECKSUM */
 586         } else {
 587                 puts(failed);
 588                 hang();
 589         }
 590 #endif
 591
 592 #if defined(CONFIG_CMD_NAND)
 593         puts("NAND:  ");
 594         nand_init();            /* go init the NAND */
 595 #endif
 596
 597 #if defined(CONFIG_CMD_ONENAND)
 598         onenand_init();
 599 #endif
 600
 601 #ifdef CONFIG_GENERIC_MMC
 602        puts("MMC:   ");
 603        mmc_initialize(gd->bd);
 604 #endif
 605
 606 #ifdef CONFIG_HAS_DATAFLASH
 607         AT91F_DataflashInit();
 608         dataflash_print_info();
 609 #endif
 610
 611         /* initialize environment */
 612         if (should_load_env())
 613                 env_relocate();
 614         else
 615                 set_default_env(NULL);
 616
 617 #if defined(CONFIG_CMD_PCI) || defined(CONFIG_PCI)
 618         arm_pci_init();
 619 #endif
 620
 621         stdio_init();   /* get the devices list going. */
 622
 623         jumptable_init();
 624
 625 #if defined(CONFIG_API)
 626         /* Initialize API */
 627         api_init();
 628 #endif
 629
 630         console_init_r();       /* fully init console as a device */
 631
 632 #ifdef CONFIG_DISPLAY_BOARDINFO_LATE
 633 # ifdef CONFIG_OF_CONTROL
 634         /* Put this here so it appears on the LCD, now it is ready */
 635         display_fdt_model(gd->fdt_blob);
 636 # else
 637         checkboard();
 638 # endif
 639 #endif
 640
 641 #if defined(CONFIG_ARCH_MISC_INIT)
 642         /* miscellaneous arch dependent initialisations */
 643         arch_misc_init();
 644 #endif
 645 #if defined(CONFIG_MISC_INIT_R)
 646         /* miscellaneous platform dependent initialisations */
 647         misc_init_r();
 648 #endif
 649
 650          /* set up exceptions */
 651         interrupt_init();
 652         /* enable exceptions */
 653         enable_interrupts();
 654
 655         /* Initialize from environment */
 656         load_addr = getenv_ulong("loadaddr", 16, load_addr);
 657
 658 #ifdef CONFIG_BOARD_LATE_INIT
 659         board_late_init();
 660 #endif
 661
 662 #ifdef CONFIG_BITBANGMII
 663         bb_miiphy_init();
 664 #endif
 665 #if defined(CONFIG_CMD_NET)
 666         puts("Net:   ");
 667         eth_initialize(gd->bd);
 668 #if defined(CONFIG_RESET_PHY_R)
 669         debug("Reset Ethernet PHY\n");
 670         reset_phy();
 671 #endif
 672 #endif
 673
 674 #ifdef CONFIG_POST
 675         post_run(NULL, POST_RAM | post_bootmode_get(0));
 676 #endif
 677
 678 #if defined(CONFIG_PRAM) || defined(CONFIG_LOGBUFFER)
 679         /*
 680          * Export available size of memory for Linux,
 681          * taking into account the protected RAM at top of memory
 682          */
 683         {
 684                 ulong pram = 0;
 685                 uchar memsz[32];
 686
 687 #ifdef CONFIG_PRAM
 688                 pram = getenv_ulong("pram", 10, CONFIG_PRAM);
 689 #endif
 690 #ifdef CONFIG_LOGBUFFER
 691 #ifndef CONFIG_ALT_LB_ADDR
 692                 /* Also take the logbuffer into account (pram is in kB) */
 693                 pram += (LOGBUFF_LEN + LOGBUFF_OVERHEAD) / 1024;
 694 #endif
 695 #endif
 696                 sprintf((char *)memsz, "%ldk", (gd->ram_size / 1024) - pram);
 697                 setenv("mem", (char *)memsz);
 698         }
 699 #endif
 700
 701         /* main_loop() can return to retry autoboot, if so just run it again. */
 702         for (;;) {
 703                 main_loop();
 704         }
 705
 706         /* NOTREACHED - no way out of command loop except booting */
 707 }
 708
 709 void hang(void)
 710 {
 711         puts("### ERROR ### Please RESET the board ###\n");
 712         for (;;);
 713 }