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                _TEXT_BASE,
 109                _bss_start_ofs + _TEXT_BASE, _bss_end_ofs + _TEXT_BASE);
 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 int print_cpuinfo(void);
 201
 202 void __dram_init_banksize(void)
 203 {
 204         gd->bd->bi_dram[0].start = CONFIG_SYS_SDRAM_BASE;
 205         gd->bd->bi_dram[0].size =  gd->ram_size;
 206 }
 207 void dram_init_banksize(void)
 208         __attribute__((weak, alias("__dram_init_banksize")));
 209
 210 int __arch_cpu_init(void)
 211 {
 212         return 0;
 213 }
 214 int arch_cpu_init(void)
 215         __attribute__((weak, alias("__arch_cpu_init")));
 216
 217 int __power_init_board(void)
 218 {
 219         return 0;
 220 }
 221 int power_init_board(void)
 222         __attribute__((weak, alias("__power_init_board")));
 223
 224         /* Record the board_init_f() bootstage (after arch_cpu_init()) */
 225 static int mark_bootstage(void)
 226 {
 227         bootstage_mark_name(BOOTSTAGE_ID_START_UBOOT_F, "board_init_f");
 228
 229         return 0;
 230 }
 231
 232 init_fnc_t *init_sequence[] = {
 233         arch_cpu_init,          /* basic arch cpu dependent setup */
 234         mark_bootstage,
 235 #ifdef CONFIG_OF_CONTROL
 236         fdtdec_check_fdt,
 237 #endif
 238 #if defined(CONFIG_BOARD_EARLY_INIT_F)
 239         board_early_init_f,
 240 #endif
 241         timer_init,             /* initialize timer */
 242 #ifdef CONFIG_BOARD_POSTCLK_INIT
 243         board_postclk_init,
 244 #endif
 245 #ifdef CONFIG_FSL_ESDHC
 246         get_clocks,
 247 #endif
 248         env_init,               /* initialize environment */
 249         init_baudrate,          /* initialze baudrate settings */
 250         serial_init,            /* serial communications setup */
 251         console_init_f,         /* stage 1 init of console */
 252         display_banner,         /* say that we are here */
 253 #if defined(CONFIG_DISPLAY_CPUINFO)
 254         print_cpuinfo,          /* display cpu info (and speed) */
 255 #endif
 256 #if defined(CONFIG_DISPLAY_BOARDINFO)
 257         checkboard,             /* display board info */
 258 #endif
 259 #if defined(CONFIG_HARD_I2C) || defined(CONFIG_SYS_I2C)
 260         init_func_i2c,
 261 #endif
 262         dram_init,              /* configure available RAM banks */
 263         NULL,
 264 };
 265
 266 void board_init_f(ulong bootflag)
 267 {
 268         bd_t *bd;
 269         init_fnc_t **init_fnc_ptr;
 270         gd_t *id;
 271         ulong addr, addr_sp;
 272 #ifdef CONFIG_PRAM
 273         ulong reg;
 274 #endif
 275         void *new_fdt = NULL;
 276         size_t fdt_size = 0;
 277
 278         memset((void *)gd, 0, sizeof(gd_t));
 279
 280         gd->mon_len = _bss_end_ofs;
 281 #ifdef CONFIG_OF_EMBED
 282         /* Get a pointer to the FDT */
 283         gd->fdt_blob = _binary_dt_dtb_start;
 284 #elif defined CONFIG_OF_SEPARATE
 285         /* FDT is at end of image */
 286         gd->fdt_blob = (void *)(_end_ofs + _TEXT_BASE);
 287 #endif
 288         /* Allow the early environment to override the fdt address */
 289         gd->fdt_blob = (void *)getenv_ulong("fdtcontroladdr", 16,
 290                                                 (uintptr_t)gd->fdt_blob);
 291
 292         for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
 293                 if ((*init_fnc_ptr)() != 0) {
 294                         hang ();
 295                 }
 296         }
 297
 298 #ifdef CONFIG_OF_CONTROL
 299         /* For now, put this check after the console is ready */
 300         if (fdtdec_prepare_fdt()) {
 301                 panic("** CONFIG_OF_CONTROL defined but no FDT - please see "
 302                         "doc/README.fdt-control");
 303         }
 304 #endif
 305
 306         debug("monitor len: %08lX\n", gd->mon_len);
 307         /*
 308          * Ram is setup, size stored in gd !!
 309          */
 310         debug("ramsize: %08lX\n", gd->ram_size);
 311 #if defined(CONFIG_SYS_MEM_TOP_HIDE)
 312         /*
 313          * Subtract specified amount of memory to hide so that it won't
 314          * get "touched" at all by U-Boot. By fixing up gd->ram_size
 315          * the Linux kernel should now get passed the now "corrected"
 316          * memory size and won't touch it either. This should work
 317          * for arch/ppc and arch/powerpc. Only Linux board ports in
 318          * arch/powerpc with bootwrapper support, that recalculate the
 319          * memory size from the SDRAM controller setup will have to
 320          * get fixed.
 321          */
 322         gd->ram_size -= CONFIG_SYS_MEM_TOP_HIDE;
 323 #endif
 324
 325         addr = CONFIG_SYS_SDRAM_BASE + gd->ram_size;
 326
 327 #ifdef CONFIG_LOGBUFFER
 328 #ifndef CONFIG_ALT_LB_ADDR
 329         /* reserve kernel log buffer */
 330         addr -= (LOGBUFF_RESERVE);
 331         debug("Reserving %dk for kernel logbuffer at %08lx\n", LOGBUFF_LEN,
 332                 addr);
 333 #endif
 334 #endif
 335
 336 #ifdef CONFIG_PRAM
 337         /*
 338          * reserve protected RAM
 339          */
 340         reg = getenv_ulong("pram", 10, CONFIG_PRAM);
 341         addr -= (reg << 10);            /* size is in kB */
 342         debug("Reserving %ldk for protected RAM at %08lx\n", reg, addr);
 343 #endif /* CONFIG_PRAM */
 344
 345 #if !(defined(CONFIG_SYS_ICACHE_OFF) && defined(CONFIG_SYS_DCACHE_OFF))
 346         /* reserve TLB table */
 347         gd->arch.tlb_size = PGTABLE_SIZE;
 348         addr -= gd->arch.tlb_size;
 349
 350         /* round down to next 64 kB limit */
 351         addr &= ~(0x10000 - 1);
 352
 353         gd->arch.tlb_addr = addr;
 354         debug("TLB table from %08lx to %08lx\n", addr, addr + gd->arch.tlb_size);
 355 #endif
 356
 357         /* round down to next 4 kB limit */
 358         addr &= ~(4096 - 1);
 359         debug("Top of RAM usable for U-Boot at: %08lx\n", addr);
 360
 361 #ifdef CONFIG_LCD
 362 #ifdef CONFIG_FB_ADDR
 363         gd->fb_base = CONFIG_FB_ADDR;
 364 #else
 365         /* reserve memory for LCD display (always full pages) */
 366         addr = lcd_setmem(addr);
 367         gd->fb_base = addr;
 368 #endif /* CONFIG_FB_ADDR */
 369 #endif /* CONFIG_LCD */
 370
 371         /*
 372          * reserve memory for U-Boot code, data & bss
 373          * round down to next 4 kB limit
 374          */
 375         addr -= gd->mon_len;
 376         addr &= ~(4096 - 1);
 377
 378         debug("Reserving %ldk for U-Boot at: %08lx\n", gd->mon_len >> 10, addr);
 379
 380 #ifndef CONFIG_SPL_BUILD
 381         /*
 382          * reserve memory for malloc() arena
 383          */
 384         addr_sp = addr - TOTAL_MALLOC_LEN;
 385         debug("Reserving %dk for malloc() at: %08lx\n",
 386                         TOTAL_MALLOC_LEN >> 10, addr_sp);
 387         /*
 388          * (permanently) allocate a Board Info struct
 389          * and a permanent copy of the "global" data
 390          */
 391         addr_sp -= sizeof (bd_t);
 392         bd = (bd_t *) addr_sp;
 393         gd->bd = bd;
 394         debug("Reserving %zu Bytes for Board Info at: %08lx\n",
 395                         sizeof (bd_t), addr_sp);
 396
 397 #ifdef CONFIG_MACH_TYPE
 398         gd->bd->bi_arch_number = CONFIG_MACH_TYPE; /* board id for Linux */
 399 #endif
 400
 401         addr_sp -= sizeof (gd_t);
 402         id = (gd_t *) addr_sp;
 403         debug("Reserving %zu Bytes for Global Data at: %08lx\n",
 404                         sizeof (gd_t), addr_sp);
 405
 406 #if defined(CONFIG_OF_SEPARATE) && defined(CONFIG_OF_CONTROL)
 407         /*
 408          * If the device tree is sitting immediate above our image then we
 409          * must relocate it. If it is embedded in the data section, then it
 410          * will be relocated with other data.
 411          */
 412         if (gd->fdt_blob) {
 413                 fdt_size = ALIGN(fdt_totalsize(gd->fdt_blob) + 0x1000, 32);
 414
 415                 addr_sp -= fdt_size;
 416                 new_fdt = (void *)addr_sp;
 417                 debug("Reserving %zu Bytes for FDT at: %08lx\n",
 418                       fdt_size, addr_sp);
 419         }
 420 #endif
 421
 422 #ifndef CONFIG_ARM64
 423         /* setup stackpointer for exeptions */
 424         gd->irq_sp = addr_sp;
 425 #ifdef CONFIG_USE_IRQ
 426         addr_sp -= (CONFIG_STACKSIZE_IRQ+CONFIG_STACKSIZE_FIQ);
 427         debug("Reserving %zu Bytes for IRQ stack at: %08lx\n",
 428                 CONFIG_STACKSIZE_IRQ+CONFIG_STACKSIZE_FIQ, addr_sp);
 429 #endif
 430         /* leave 3 words for abort-stack    */
 431         addr_sp -= 12;
 432
 433         /* 8-byte alignment for ABI compliance */
 434         addr_sp &= ~0x07;
 435 #else   /* CONFIG_ARM64 */
 436         /* 16-byte alignment for ABI compliance */
 437         addr_sp &= ~0x0f;
 438 #endif  /* CONFIG_ARM64 */
 439 #else
 440         addr_sp += 128; /* leave 32 words for abort-stack   */
 441         gd->irq_sp = addr_sp;
 442 #endif
 443
 444         debug("New Stack Pointer is: %08lx\n", addr_sp);
 445
 446 #ifdef CONFIG_POST
 447         post_bootmode_init();
 448         post_run(NULL, POST_ROM | post_bootmode_get(0));
 449 #endif
 450
 451         gd->bd->bi_baudrate = gd->baudrate;
 452         /* Ram ist board specific, so move it to board code ... */
 453         dram_init_banksize();
 454         display_dram_config();  /* and display it */
 455
 456         gd->relocaddr = addr;
 457         gd->start_addr_sp = addr_sp;
 458         gd->reloc_off = addr - _TEXT_BASE;
 459         debug("relocation Offset is: %08lx\n", gd->reloc_off);
 460         if (new_fdt) {
 461                 memcpy(new_fdt, gd->fdt_blob, fdt_size);
 462                 gd->fdt_blob = new_fdt;
 463         }
 464         memcpy(id, (void *)gd, sizeof(gd_t));
 465 }
 466
 467 #if !defined(CONFIG_SYS_NO_FLASH)
 468 static char *failed = "*** failed ***\n";
 469 #endif
 470
 471 /*
 472  * Tell if it's OK to load the environment early in boot.
 473  *
 474  * If CONFIG_OF_CONFIG is defined, we'll check with the FDT to see
 475  * if this is OK (defaulting to saying it's not OK).
 476  *
 477  * NOTE: Loading the environment early can be a bad idea if security is
 478  *       important, since no verification is done on the environment.
 479  *
 480  * @return 0 if environment should not be loaded, !=0 if it is ok to load
 481  */
 482 static int should_load_env(void)
 483 {
 484 #ifdef CONFIG_OF_CONTROL
 485         return fdtdec_get_config_int(gd->fdt_blob, "load-environment", 1);
 486 #elif defined CONFIG_DELAY_ENVIRONMENT
 487         return 0;
 488 #else
 489         return 1;
 490 #endif
 491 }
 492
 493 #if defined(CONFIG_DISPLAY_BOARDINFO_LATE) && defined(CONFIG_OF_CONTROL)
 494 static void display_fdt_model(const void *blob)
 495 {
 496         const char *model;
 497
 498         model = (char *)fdt_getprop(blob, 0, "model", NULL);
 499         printf("Model: %s\n", model ? model : "<unknown>");
 500 }
 501 #endif
 502
 503 /************************************************************************
 504  *
 505  * This is the next part if the initialization sequence: we are now
 506  * running from RAM and have a "normal" C environment, i. e. global
 507  * data can be written, BSS has been cleared, the stack size in not
 508  * that critical any more, etc.
 509  *
 510  ************************************************************************
 511  */
 512
 513 void board_init_r(gd_t *id, ulong dest_addr)
 514 {
 515         ulong malloc_start;
 516 #if !defined(CONFIG_SYS_NO_FLASH)
 517         ulong flash_size;
 518 #endif
 519
 520         gd->flags |= GD_FLG_RELOC;      /* tell others: relocation done */
 521         bootstage_mark_name(BOOTSTAGE_ID_START_UBOOT_R, "board_init_r");
 522
 523         monitor_flash_len = _end_ofs;
 524
 525         /* Enable caches */
 526         enable_caches();
 527
 528         debug("monitor flash len: %08lX\n", monitor_flash_len);
 529         board_init();   /* Setup chipselects */
 530         /*
 531          * TODO: printing of the clock inforamtion of the board is now
 532          * implemented as part of bdinfo command. Currently only support for
 533          * davinci SOC's is added. Remove this check once all the board
 534          * implement this.
 535          */
 536 #ifdef CONFIG_CLOCKS
 537         set_cpu_clk_info(); /* Setup clock information */
 538 #endif
 539         serial_initialize();
 540
 541         debug("Now running in RAM - U-Boot at: %08lx\n", dest_addr);
 542
 543 #ifdef CONFIG_LOGBUFFER
 544         logbuff_init_ptrs();
 545 #endif
 546 #ifdef CONFIG_POST
 547         post_output_backlog();
 548 #endif
 549
 550         /* The Malloc area is immediately below the monitor copy in DRAM */
 551         malloc_start = dest_addr - TOTAL_MALLOC_LEN;
 552         mem_malloc_init (malloc_start, TOTAL_MALLOC_LEN);
 553
 554 #ifdef CONFIG_ARCH_EARLY_INIT_R
 555         arch_early_init_r();
 556 #endif
 557         power_init_board();
 558
 559 #if !defined(CONFIG_SYS_NO_FLASH)
 560         puts("Flash: ");
 561
 562         flash_size = flash_init();
 563         if (flash_size > 0) {
 564 # ifdef CONFIG_SYS_FLASH_CHECKSUM
 565                 print_size(flash_size, "");
 566                 /*
 567                  * Compute and print flash CRC if flashchecksum is set to 'y'
 568                  *
 569                  * NOTE: Maybe we should add some WATCHDOG_RESET()? XXX
 570                  */
 571                 if (getenv_yesno("flashchecksum") == 1) {
 572                         printf("  CRC: %08X", crc32(0,
 573                                 (const unsigned char *) CONFIG_SYS_FLASH_BASE,
 574                                 flash_size));
 575                 }
 576                 putc('\n');
 577 # else  /* !CONFIG_SYS_FLASH_CHECKSUM */
 578                 print_size(flash_size, "\n");
 579 # endif /* CONFIG_SYS_FLASH_CHECKSUM */
 580         } else {
 581                 puts(failed);
 582                 hang();
 583         }
 584 #endif
 585
 586 #if defined(CONFIG_CMD_NAND)
 587         puts("NAND:  ");
 588         nand_init();            /* go init the NAND */
 589 #endif
 590
 591 #if defined(CONFIG_CMD_ONENAND)
 592         onenand_init();
 593 #endif
 594
 595 #ifdef CONFIG_GENERIC_MMC
 596         puts("MMC:   ");
 597         mmc_initialize(gd->bd);
 598 #endif
 599
 600 #ifdef CONFIG_HAS_DATAFLASH
 601         AT91F_DataflashInit();
 602         dataflash_print_info();
 603 #endif
 604
 605         /* initialize environment */
 606         if (should_load_env())
 607                 env_relocate();
 608         else
 609                 set_default_env(NULL);
 610
 611 #if defined(CONFIG_CMD_PCI) || defined(CONFIG_PCI)
 612         arm_pci_init();
 613 #endif
 614
 615         stdio_init();   /* get the devices list going. */
 616
 617         jumptable_init();
 618
 619 #if defined(CONFIG_API)
 620         /* Initialize API */
 621         api_init();
 622 #endif
 623
 624         console_init_r();       /* fully init console as a device */
 625
 626 #ifdef CONFIG_DISPLAY_BOARDINFO_LATE
 627 # ifdef CONFIG_OF_CONTROL
 628         /* Put this here so it appears on the LCD, now it is ready */
 629         display_fdt_model(gd->fdt_blob);
 630 # else
 631         checkboard();
 632 # endif
 633 #endif
 634
 635 #if defined(CONFIG_ARCH_MISC_INIT)
 636         /* miscellaneous arch dependent initialisations */
 637         arch_misc_init();
 638 #endif
 639 #if defined(CONFIG_MISC_INIT_R)
 640         /* miscellaneous platform dependent initialisations */
 641         misc_init_r();
 642 #endif
 643
 644          /* set up exceptions */
 645         interrupt_init();
 646         /* enable exceptions */
 647         enable_interrupts();
 648
 649         /* Initialize from environment */
 650         load_addr = getenv_ulong("loadaddr", 16, load_addr);
 651
 652 #ifdef CONFIG_BOARD_LATE_INIT
 653         board_late_init();
 654 #endif
 655
 656 #ifdef CONFIG_BITBANGMII
 657         bb_miiphy_init();
 658 #endif
 659 #if defined(CONFIG_CMD_NET)
 660         puts("Net:   ");
 661         eth_initialize(gd->bd);
 662 #if defined(CONFIG_RESET_PHY_R)
 663         debug("Reset Ethernet PHY\n");
 664         reset_phy();
 665 #endif
 666 #endif
 667
 668 #ifdef CONFIG_POST
 669         post_run(NULL, POST_RAM | post_bootmode_get(0));
 670 #endif
 671
 672 #if defined(CONFIG_PRAM) || defined(CONFIG_LOGBUFFER)
 673         /*
 674          * Export available size of memory for Linux,
 675          * taking into account the protected RAM at top of memory
 676          */
 677         {
 678                 ulong pram = 0;
 679                 uchar memsz[32];
 680
 681 #ifdef CONFIG_PRAM
 682                 pram = getenv_ulong("pram", 10, CONFIG_PRAM);
 683 #endif
 684 #ifdef CONFIG_LOGBUFFER
 685 #ifndef CONFIG_ALT_LB_ADDR
 686                 /* Also take the logbuffer into account (pram is in kB) */
 687                 pram += (LOGBUFF_LEN + LOGBUFF_OVERHEAD) / 1024;
 688 #endif
 689 #endif
 690                 sprintf((char *)memsz, "%ldk", (gd->ram_size / 1024) - pram);
 691                 setenv("mem", (char *)memsz);
 692         }
 693 #endif
 694
 695         /* main_loop() can return to retry autoboot, if so just run it again. */
 696         for (;;) {
 697                 main_loop();
 698         }
 699
 700         /* NOTREACHED - no way out of command loop except booting */
 701 }