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  * SPDX-License-Identifier:     GPL-2.0+
  10  */
  11
  12 /*
  13  * To match the U-Boot user interface on ARM platforms to the U-Boot
  14  * standard (as on PPC platforms), some messages with debug character
  15  * are removed from the default U-Boot build.
  16  *
  17  * Define DEBUG here if you want additional info as shown below
  18  * printed upon startup:
  19  *
  20  * U-Boot code: 00F00000 -> 00F3C774  BSS: -> 00FC3274
  21  * IRQ Stack: 00ebff7c
  22  * FIQ Stack: 00ebef7c
  23  */
  24
  25 #include <common.h>
  26 #include <command.h>
  27 #include <environment.h>
  28 #include <malloc.h>
  29 #include <stdio_dev.h>
  30 #include <version.h>
  31 #include <net.h>
  32 #include <serial.h>
  33 #include <nand.h>
  34 #include <onenand_uboot.h>
  35 #include <mmc.h>
  36 #include <libfdt.h>
  37 #include <fdtdec.h>
  38 #include <post.h>
  39 #include <logbuff.h>
  40 #include <asm/sections.h>
  41
  42 #ifdef CONFIG_BITBANGMII
  43 #include <miiphy.h>
  44 #endif
  45
  46 DECLARE_GLOBAL_DATA_PTR;
  47
  48 ulong monitor_flash_len;
  49
  50 #ifdef CONFIG_HAS_DATAFLASH
  51 extern int  AT91F_DataflashInit(void);
  52 extern void dataflash_print_info(void);
  53 #endif
  54
  55 #if defined(CONFIG_HARD_I2C) || \
  56         defined(CONFIG_SYS_I2C)
  57 #include <i2c.h>
  58 #endif
  59
  60 /************************************************************************
  61  * Coloured LED functionality
  62  ************************************************************************
  63  * May be supplied by boards if desired
  64  */
  65 inline void __coloured_LED_init(void) {}
  66 void coloured_LED_init(void)
  67         __attribute__((weak, alias("__coloured_LED_init")));
  68 inline void __red_led_on(void) {}
  69 void red_led_on(void) __attribute__((weak, alias("__red_led_on")));
  70 inline void __red_led_off(void) {}
  71 void red_led_off(void) __attribute__((weak, alias("__red_led_off")));
  72 inline void __green_led_on(void) {}
  73 void green_led_on(void) __attribute__((weak, alias("__green_led_on")));
  74 inline void __green_led_off(void) {}
  75 void green_led_off(void) __attribute__((weak, alias("__green_led_off")));
  76 inline void __yellow_led_on(void) {}
  77 void yellow_led_on(void) __attribute__((weak, alias("__yellow_led_on")));
  78 inline void __yellow_led_off(void) {}
  79 void yellow_led_off(void) __attribute__((weak, alias("__yellow_led_off")));
  80 inline void __blue_led_on(void) {}
  81 void blue_led_on(void) __attribute__((weak, alias("__blue_led_on")));
  82 inline void __blue_led_off(void) {}
  83 void blue_led_off(void) __attribute__((weak, alias("__blue_led_off")));
  84
  85 /*
  86  ************************************************************************
  87  * Init Utilities                                                       *
  88  ************************************************************************
  89  * Some of this code should be moved into the core functions,
  90  * or dropped completely,
  91  * but let's get it working (again) first...
  92  */
  93
  94 #if defined(CONFIG_ARM_DCC) && !defined(CONFIG_BAUDRATE)
  95 #define CONFIG_BAUDRATE 115200
  96 #endif
  97
  98 static int init_baudrate(void)
  99 {
 100         gd->baudrate = getenv_ulong("baudrate", 10, CONFIG_BAUDRATE);
 101         return 0;
 102 }
 103
 104 static int display_banner(void)
 105 {
 106         printf("\n\n%s\n\n", version_string);
 107         debug("U-Boot code: %08lX -> %08lX  BSS: -> %08lX\n",
 108                (ulong)&_start,
 109                (ulong)&__bss_start, (ulong)&__bss_end);
 110 #ifdef CONFIG_MODEM_SUPPORT
 111         debug("Modem Support enabled\n");
 112 #endif
 113 #ifdef CONFIG_USE_IRQ
 114         debug("IRQ Stack: %08lx\n", IRQ_STACK_START);
 115         debug("FIQ Stack: %08lx\n", FIQ_STACK_START);
 116 #endif
 117
 118         return (0);
 119 }
 120
 121 /*
 122  * WARNING: this code looks "cleaner" than the PowerPC version, but
 123  * has the disadvantage that you either get nothing, or everything.
 124  * On PowerPC, you might see "DRAM: " before the system hangs - which
 125  * gives a simple yet clear indication which part of the
 126  * initialization if failing.
 127  */
 128 static int display_dram_config(void)
 129 {
 130         int i;
 131
 132 #ifdef DEBUG
 133         puts("RAM Configuration:\n");
 134
 135         for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
 136                 printf("Bank #%d: %08lx ", i, gd->bd->bi_dram[i].start);
 137                 print_size(gd->bd->bi_dram[i].size, "\n");
 138         }
 139 #else
 140         ulong size = 0;
 141
 142         for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++)
 143                 size += gd->bd->bi_dram[i].size;
 144
 145         puts("DRAM:  ");
 146         print_size(size, "\n");
 147 #endif
 148
 149         return (0);
 150 }
 151
 152 #if defined(CONFIG_HARD_I2C) || defined(CONFIG_SYS_I2C)
 153 static int init_func_i2c(void)
 154 {
 155         puts("I2C:   ");
 156 #ifdef CONFIG_SYS_I2C
 157         i2c_init_all();
 158 #else
 159         i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
 160 #endif
 161         puts("ready\n");
 162         return (0);
 163 }
 164 #endif
 165
 166 #if defined(CONFIG_CMD_PCI) || defined (CONFIG_PCI)
 167 #include <pci.h>
 168 static int arm_pci_init(void)
 169 {
 170         pci_init();
 171         return 0;
 172 }
 173 #endif /* CONFIG_CMD_PCI || CONFIG_PCI */
 174
 175 /*
 176  * Breathe some life into the board...
 177  *
 178  * Initialize a serial port as console, and carry out some hardware
 179  * tests.
 180  *
 181  * The first part of initialization is running from Flash memory;
 182  * its main purpose is to initialize the RAM so that we
 183  * can relocate the monitor code to RAM.
 184  */
 185
 186 /*
 187  * All attempts to come up with a "common" initialization sequence
 188  * that works for all boards and architectures failed: some of the
 189  * requirements are just _too_ different. To get rid of the resulting
 190  * mess of board dependent #ifdef'ed code we now make the whole
 191  * initialization sequence configurable to the user.
 192  *
 193  * The requirements for any new initalization function is simple: it
 194  * receives a pointer to the "global data" structure as it's only
 195  * argument, and returns an integer return code, where 0 means
 196  * "continue" and != 0 means "fatal error, hang the system".
 197  */
 198 typedef int (init_fnc_t) (void);
 199
 200 void __dram_init_banksize(void)
 201 {
 202         gd->bd->bi_dram[0].start = CONFIG_SYS_SDRAM_BASE;
 203         gd->bd->bi_dram[0].size =  gd->ram_size;
 204 }
 205 void dram_init_banksize(void)
 206         __attribute__((weak, alias("__dram_init_banksize")));
 207
 208 int __arch_cpu_init(void)
 209 {
 210         return 0;
 211 }
 212 int arch_cpu_init(void)
 213         __attribute__((weak, alias("__arch_cpu_init")));
 214
 215 int __power_init_board(void)
 216 {
 217         return 0;
 218 }
 219 int power_init_board(void)
 220         __attribute__((weak, alias("__power_init_board")));
 221
 222         /* Record the board_init_f() bootstage (after arch_cpu_init()) */
 223 static int mark_bootstage(void)
 224 {
 225         bootstage_mark_name(BOOTSTAGE_ID_START_UBOOT_F, "board_init_f");
 226
 227         return 0;
 228 }
 229
 230 init_fnc_t *init_sequence[] = {
 231         arch_cpu_init,          /* basic arch cpu dependent setup */
 232         mark_bootstage,
 233 #ifdef CONFIG_OF_CONTROL
 234         fdtdec_check_fdt,
 235 #endif
 236 #if defined(CONFIG_BOARD_EARLY_INIT_F)
 237         board_early_init_f,
 238 #endif
 239         timer_init,             /* initialize timer */
 240 #ifdef CONFIG_BOARD_POSTCLK_INIT
 241         board_postclk_init,
 242 #endif
 243 #ifdef CONFIG_FSL_ESDHC
 244         get_clocks,
 245 #endif
 246         env_init,               /* initialize environment */
 247         init_baudrate,          /* initialze baudrate settings */
 248         serial_init,            /* serial communications setup */
 249         console_init_f,         /* stage 1 init of console */
 250         display_banner,         /* say that we are here */
 251         print_cpuinfo,          /* display cpu info (and speed) */
 252 #if defined(CONFIG_DISPLAY_BOARDINFO)
 253         checkboard,             /* display board info */
 254 #endif
 255 #if defined(CONFIG_HARD_I2C) || defined(CONFIG_SYS_I2C)
 256         init_func_i2c,
 257 #endif
 258         dram_init,              /* configure available RAM banks */
 259         NULL,
 260 };
 261
 262 void board_init_f(ulong bootflag)
 263 {
 264         bd_t *bd;
 265         init_fnc_t **init_fnc_ptr;
 266         gd_t *id;
 267         ulong addr, addr_sp;
 268 #ifdef CONFIG_PRAM
 269         ulong reg;
 270 #endif
 271         void *new_fdt = NULL;
 272         size_t fdt_size = 0;
 273
 274         memset((void *)gd, 0, sizeof(gd_t));
 275
 276         gd->mon_len = (ulong)&__bss_end - (ulong)_start;
 277 #ifdef CONFIG_OF_EMBED
 278         /* Get a pointer to the FDT */
 279         gd->fdt_blob = __dtb_db_begin;
 280 #elif defined CONFIG_OF_SEPARATE
 281         /* FDT is at end of image */
 282         gd->fdt_blob = &_end;
 283 #endif
 284         /* Allow the early environment to override the fdt address */
 285         gd->fdt_blob = (void *)getenv_ulong("fdtcontroladdr", 16,
 286                                                 (uintptr_t)gd->fdt_blob);
 287
 288         for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
 289                 if ((*init_fnc_ptr)() != 0) {
 290                         hang ();
 291                 }
 292         }
 293
 294 #ifdef CONFIG_OF_CONTROL
 295         /* For now, put this check after the console is ready */
 296         if (fdtdec_prepare_fdt()) {
 297                 panic("** CONFIG_OF_CONTROL defined but no FDT - please see "
 298                         "doc/README.fdt-control");
 299         }
 300 #endif
 301
 302         debug("monitor len: %08lX\n", gd->mon_len);
 303         /*
 304          * Ram is setup, size stored in gd !!
 305          */
 306         debug("ramsize: %08lX\n", gd->ram_size);
 307 #if defined(CONFIG_SYS_MEM_TOP_HIDE)
 308         /*
 309          * Subtract specified amount of memory to hide so that it won't
 310          * get "touched" at all by U-Boot. By fixing up gd->ram_size
 311          * the Linux kernel should now get passed the now "corrected"
 312          * memory size and won't touch it either. This should work
 313          * for arch/ppc and arch/powerpc. Only Linux board ports in
 314          * arch/powerpc with bootwrapper support, that recalculate the
 315          * memory size from the SDRAM controller setup will have to
 316          * get fixed.
 317          */
 318         gd->ram_size -= CONFIG_SYS_MEM_TOP_HIDE;
 319 #endif
 320
 321         addr = CONFIG_SYS_SDRAM_BASE + get_effective_memsize();
 322
 323 #ifdef CONFIG_LOGBUFFER
 324 #ifndef CONFIG_ALT_LB_ADDR
 325         /* reserve kernel log buffer */
 326         addr -= (LOGBUFF_RESERVE);
 327         debug("Reserving %dk for kernel logbuffer at %08lx\n", LOGBUFF_LEN,
 328                 addr);
 329 #endif
 330 #endif
 331
 332 #ifdef CONFIG_PRAM
 333         /*
 334          * reserve protected RAM
 335          */
 336         reg = getenv_ulong("pram", 10, CONFIG_PRAM);
 337         addr -= (reg << 10);            /* size is in kB */
 338         debug("Reserving %ldk for protected RAM at %08lx\n", reg, addr);
 339 #endif /* CONFIG_PRAM */
 340
 341 #if !(defined(CONFIG_SYS_ICACHE_OFF) && defined(CONFIG_SYS_DCACHE_OFF))
 342         /* reserve TLB table */
 343         gd->arch.tlb_size = PGTABLE_SIZE;
 344         addr -= gd->arch.tlb_size;
 345
 346         /* round down to next 64 kB limit */
 347         addr &= ~(0x10000 - 1);
 348
 349         gd->arch.tlb_addr = addr;
 350         debug("TLB table from %08lx to %08lx\n", addr, addr + gd->arch.tlb_size);
 351 #endif
 352
 353         /* round down to next 4 kB limit */
 354         addr &= ~(4096 - 1);
 355         debug("Top of RAM usable for U-Boot at: %08lx\n", addr);
 356
 357 #ifdef CONFIG_LCD
 358 #ifdef CONFIG_FB_ADDR
 359         gd->fb_base = CONFIG_FB_ADDR;
 360 #else
 361         /* reserve memory for LCD display (always full pages) */
 362         addr = lcd_setmem(addr);
 363         gd->fb_base = addr;
 364 #endif /* CONFIG_FB_ADDR */
 365 #endif /* CONFIG_LCD */
 366
 367         /*
 368          * reserve memory for U-Boot code, data & bss
 369          * round down to next 4 kB limit
 370          */
 371         addr -= gd->mon_len;
 372         addr &= ~(4096 - 1);
 373
 374         debug("Reserving %ldk for U-Boot at: %08lx\n", gd->mon_len >> 10, addr);
 375
 376 #ifndef CONFIG_SPL_BUILD
 377         /*
 378          * reserve memory for malloc() arena
 379          */
 380         addr_sp = addr - TOTAL_MALLOC_LEN;
 381         debug("Reserving %dk for malloc() at: %08lx\n",
 382                         TOTAL_MALLOC_LEN >> 10, addr_sp);
 383         /*
 384          * (permanently) allocate a Board Info struct
 385          * and a permanent copy of the "global" data
 386          */
 387         addr_sp -= sizeof (bd_t);
 388         bd = (bd_t *) addr_sp;
 389         gd->bd = bd;
 390         debug("Reserving %zu Bytes for Board Info at: %08lx\n",
 391                         sizeof (bd_t), addr_sp);
 392
 393 #ifdef CONFIG_MACH_TYPE
 394         gd->bd->bi_arch_number = CONFIG_MACH_TYPE; /* board id for Linux */
 395 #endif
 396
 397         addr_sp -= sizeof (gd_t);
 398         id = (gd_t *) addr_sp;
 399         debug("Reserving %zu Bytes for Global Data at: %08lx\n",
 400                         sizeof (gd_t), addr_sp);
 401
 402 #if defined(CONFIG_OF_SEPARATE) && defined(CONFIG_OF_CONTROL)
 403         /*
 404          * If the device tree is sitting immediate above our image then we
 405          * must relocate it. If it is embedded in the data section, then it
 406          * will be relocated with other data.
 407          */
 408         if (gd->fdt_blob) {
 409                 fdt_size = ALIGN(fdt_totalsize(gd->fdt_blob) + 0x1000, 32);
 410
 411                 addr_sp -= fdt_size;
 412                 new_fdt = (void *)addr_sp;
 413                 debug("Reserving %zu Bytes for FDT at: %08lx\n",
 414                       fdt_size, addr_sp);
 415         }
 416 #endif
 417
 418 #ifndef CONFIG_ARM64
 419         /* setup stackpointer for exeptions */
 420         gd->irq_sp = addr_sp;
 421 #ifdef CONFIG_USE_IRQ
 422         addr_sp -= (CONFIG_STACKSIZE_IRQ+CONFIG_STACKSIZE_FIQ);
 423         debug("Reserving %zu Bytes for IRQ stack at: %08lx\n",
 424                 CONFIG_STACKSIZE_IRQ+CONFIG_STACKSIZE_FIQ, addr_sp);
 425 #endif
 426         /* leave 3 words for abort-stack    */
 427         addr_sp -= 12;
 428
 429         /* 8-byte alignment for ABI compliance */
 430         addr_sp &= ~0x07;
 431 #else   /* CONFIG_ARM64 */
 432         /* 16-byte alignment for ABI compliance */
 433         addr_sp &= ~0x0f;
 434 #endif  /* CONFIG_ARM64 */
 435 #else
 436         addr_sp += 128; /* leave 32 words for abort-stack   */
 437         gd->irq_sp = addr_sp;
 438 #endif
 439
 440         debug("New Stack Pointer is: %08lx\n", addr_sp);
 441
 442 #ifdef CONFIG_POST
 443         post_bootmode_init();
 444         post_run(NULL, POST_ROM | post_bootmode_get(0));
 445 #endif
 446
 447         gd->bd->bi_baudrate = gd->baudrate;
 448         /* Ram ist board specific, so move it to board code ... */
 449         dram_init_banksize();
 450         display_dram_config();  /* and display it */
 451
 452         gd->relocaddr = addr;
 453         gd->start_addr_sp = addr_sp;
 454         gd->reloc_off = addr - (ulong)&_start;
 455         debug("relocation Offset is: %08lx\n", gd->reloc_off);
 456         if (new_fdt) {
 457                 memcpy(new_fdt, gd->fdt_blob, fdt_size);
 458                 gd->fdt_blob = new_fdt;
 459         }
 460         memcpy(id, (void *)gd, sizeof(gd_t));
 461 }
 462
 463 #if !defined(CONFIG_SYS_NO_FLASH)
 464 static char *failed = "*** failed ***\n";
 465 #endif
 466
 467 /*
 468  * Tell if it's OK to load the environment early in boot.
 469  *
 470  * If CONFIG_OF_CONFIG is defined, we'll check with the FDT to see
 471  * if this is OK (defaulting to saying it's not OK).
 472  *
 473  * NOTE: Loading the environment early can be a bad idea if security is
 474  *       important, since no verification is done on the environment.
 475  *
 476  * @return 0 if environment should not be loaded, !=0 if it is ok to load
 477  */
 478 static int should_load_env(void)
 479 {
 480 #ifdef CONFIG_OF_CONTROL
 481         return fdtdec_get_config_int(gd->fdt_blob, "load-environment", 1);
 482 #elif defined CONFIG_DELAY_ENVIRONMENT
 483         return 0;
 484 #else
 485         return 1;
 486 #endif
 487 }
 488
 489 #if defined(CONFIG_DISPLAY_BOARDINFO_LATE) && defined(CONFIG_OF_CONTROL)
 490 static void display_fdt_model(const void *blob)
 491 {
 492         const char *model;
 493
 494         model = (char *)fdt_getprop(blob, 0, "model", NULL);
 495         printf("Model: %s\n", model ? model : "<unknown>");
 496 }
 497 #endif
 498
 499 /************************************************************************
 500  *
 501  * This is the next part if the initialization sequence: we are now
 502  * running from RAM and have a "normal" C environment, i. e. global
 503  * data can be written, BSS has been cleared, the stack size in not
 504  * that critical any more, etc.
 505  *
 506  ************************************************************************
 507  */
 508
 509 void board_init_r(gd_t *id, ulong dest_addr)
 510 {
 511         ulong malloc_start;
 512 #if !defined(CONFIG_SYS_NO_FLASH)
 513         ulong flash_size;
 514 #endif
 515
 516         gd->flags |= GD_FLG_RELOC;      /* tell others: relocation done */
 517         bootstage_mark_name(BOOTSTAGE_ID_START_UBOOT_R, "board_init_r");
 518
 519         monitor_flash_len = (ulong)&__rel_dyn_end - (ulong)_start;
 520
 521         /* Enable caches */
 522         enable_caches();
 523
 524         debug("monitor flash len: %08lX\n", monitor_flash_len);
 525         board_init();   /* Setup chipselects */
 526         /*
 527          * TODO: printing of the clock inforamtion of the board is now
 528          * implemented as part of bdinfo command. Currently only support for
 529          * davinci SOC's is added. Remove this check once all the board
 530          * implement this.
 531          */
 532 #ifdef CONFIG_CLOCKS
 533         set_cpu_clk_info(); /* Setup clock information */
 534 #endif
 535         serial_initialize();
 536
 537         debug("Now running in RAM - U-Boot at: %08lx\n", dest_addr);
 538
 539 #ifdef CONFIG_LOGBUFFER
 540         logbuff_init_ptrs();
 541 #endif
 542 #ifdef CONFIG_POST
 543         post_output_backlog();
 544 #endif
 545
 546         /* The Malloc area is immediately below the monitor copy in DRAM */
 547         malloc_start = dest_addr - TOTAL_MALLOC_LEN;
 548         mem_malloc_init (malloc_start, TOTAL_MALLOC_LEN);
 549
 550 #ifdef CONFIG_ARCH_EARLY_INIT_R
 551         arch_early_init_r();
 552 #endif
 553         power_init_board();
 554
 555 #if !defined(CONFIG_SYS_NO_FLASH)
 556         puts("Flash: ");
 557
 558         flash_size = flash_init();
 559         if (flash_size > 0) {
 560 # ifdef CONFIG_SYS_FLASH_CHECKSUM
 561                 print_size(flash_size, "");
 562                 /*
 563                  * Compute and print flash CRC if flashchecksum is set to 'y'
 564                  *
 565                  * NOTE: Maybe we should add some WATCHDOG_RESET()? XXX
 566                  */
 567                 if (getenv_yesno("flashchecksum") == 1) {
 568                         printf("  CRC: %08X", crc32(0,
 569                                 (const unsigned char *) CONFIG_SYS_FLASH_BASE,
 570                                 flash_size));
 571                 }
 572                 putc('\n');
 573 # else  /* !CONFIG_SYS_FLASH_CHECKSUM */
 574                 print_size(flash_size, "\n");
 575 # endif /* CONFIG_SYS_FLASH_CHECKSUM */
 576         } else {
 577                 puts(failed);
 578                 hang();
 579         }
 580 #endif
 581
 582 #if defined(CONFIG_CMD_NAND)
 583         puts("NAND:  ");
 584         nand_init();            /* go init the NAND */
 585 #endif
 586
 587 #if defined(CONFIG_CMD_ONENAND)
 588         onenand_init();
 589 #endif
 590
 591 #ifdef CONFIG_GENERIC_MMC
 592         puts("MMC:   ");
 593         mmc_initialize(gd->bd);
 594 #endif
 595
 596 #ifdef CONFIG_HAS_DATAFLASH
 597         AT91F_DataflashInit();
 598         dataflash_print_info();
 599 #endif
 600
 601         /* initialize environment */
 602         if (should_load_env())
 603                 env_relocate();
 604         else
 605                 set_default_env(NULL);
 606
 607 #if defined(CONFIG_CMD_PCI) || defined(CONFIG_PCI)
 608         arm_pci_init();
 609 #endif
 610
 611         stdio_init();   /* get the devices list going. */
 612
 613         jumptable_init();
 614
 615 #if defined(CONFIG_API)
 616         /* Initialize API */
 617         api_init();
 618 #endif
 619
 620         console_init_r();       /* fully init console as a device */
 621
 622 #ifdef CONFIG_DISPLAY_BOARDINFO_LATE
 623 # ifdef CONFIG_OF_CONTROL
 624         /* Put this here so it appears on the LCD, now it is ready */
 625         display_fdt_model(gd->fdt_blob);
 626 # else
 627         checkboard();
 628 # endif
 629 #endif
 630
 631 #if defined(CONFIG_ARCH_MISC_INIT)
 632         /* miscellaneous arch dependent initialisations */
 633         arch_misc_init();
 634 #endif
 635 #if defined(CONFIG_MISC_INIT_R)
 636         /* miscellaneous platform dependent initialisations */
 637         misc_init_r();
 638 #endif
 639
 640          /* set up exceptions */
 641         interrupt_init();
 642         /* enable exceptions */
 643         enable_interrupts();
 644
 645         /* Initialize from environment */
 646         load_addr = getenv_ulong("loadaddr", 16, load_addr);
 647
 648 #ifdef CONFIG_BOARD_LATE_INIT
 649         board_late_init();
 650 #endif
 651
 652 #ifdef CONFIG_BITBANGMII
 653         bb_miiphy_init();
 654 #endif
 655 #if defined(CONFIG_CMD_NET)
 656         puts("Net:   ");
 657         eth_initialize(gd->bd);
 658 #if defined(CONFIG_RESET_PHY_R)
 659         debug("Reset Ethernet PHY\n");
 660         reset_phy();
 661 #endif
 662 #endif
 663
 664 #ifdef CONFIG_POST
 665         post_run(NULL, POST_RAM | post_bootmode_get(0));
 666 #endif
 667
 668 #if defined(CONFIG_PRAM) || defined(CONFIG_LOGBUFFER)
 669         /*
 670          * Export available size of memory for Linux,
 671          * taking into account the protected RAM at top of memory
 672          */
 673         {
 674                 ulong pram = 0;
 675                 uchar memsz[32];
 676
 677 #ifdef CONFIG_PRAM
 678                 pram = getenv_ulong("pram", 10, CONFIG_PRAM);
 679 #endif
 680 #ifdef CONFIG_LOGBUFFER
 681 #ifndef CONFIG_ALT_LB_ADDR
 682                 /* Also take the logbuffer into account (pram is in kB) */
 683                 pram += (LOGBUFF_LEN + LOGBUFF_OVERHEAD) / 1024;
 684 #endif
 685 #endif
 686                 sprintf((char *)memsz, "%ldk", (gd->ram_size / 1024) - pram);
 687                 setenv("mem", (char *)memsz);
 688         }
 689 #endif
 690
 691         /* main_loop() can return to retry autoboot, if so just run it again. */
 692         for (;;) {
 693                 main_loop();
 694         }
 695
 696         /* NOTREACHED - no way out of command loop except booting */
 697 }