lib_i386/board.c

   1 /*
   2  * (C) Copyright 2002
   3  * Daniel Engström, Omicron Ceti AB, daniel@omicron.se
   4  *
   5  * (C) Copyright 2002
   6  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   7  *
   8  * (C) Copyright 2002
   9  * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
  10  * Marius Groeger <mgroeger@sysgo.de>
  11  *
  12  * See file CREDITS for list of people who contributed to this
  13  * project.
  14  *
  15  * This program is free software; you can redistribute it and/or
  16  * modify it under the terms of the GNU General Public License as
  17  * published by the Free Software Foundation; either version 2 of
  18  * the License, or (at your option) any later version.
  19  *
  20  * This program is distributed in the hope that it will be useful,
  21  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  22  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  23  * GNU General Public License for more details.
  24  *
  25  * You should have received a copy of the GNU General Public License
  26  * along with this program; if not, write to the Free Software
  27  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  28  * MA 02111-1307 USA
  29  */
  30
  31 #include <common.h>
  32 #include <watchdog.h>
  33 #include <command.h>
  34 #include <devices.h>
  35 #include <version.h>
  36 #include <malloc.h>
  37 #include <net.h>
  38 #include <ide.h>
  39 #include <asm/u-boot-i386.h>
  40
  41 DECLARE_GLOBAL_DATA_PTR;
  42
  43 extern long _i386boot_start;
  44 extern long _i386boot_end;
  45 extern long _i386boot_romdata_start;
  46 extern long _i386boot_romdata_dest;
  47 extern long _i386boot_romdata_size;
  48 extern long _i386boot_bss_start;
  49 extern long _i386boot_bss_size;
  50
  51 extern long _i386boot_realmode;
  52 extern long _i386boot_realmode_size;
  53 extern long _i386boot_bios;
  54 extern long _i386boot_bios_size;
  55
  56 /* The symbols defined by the linker script becomes pointers
  57  * which is somewhat inconveient ... */
  58 ulong i386boot_start         = (ulong)&_i386boot_start;         /* code start (in flash) defined in start.S */
  59 ulong i386boot_end           = (ulong)&_i386boot_end;           /* code end (in flash) */
  60 ulong i386boot_romdata_start = (ulong)&_i386boot_romdata_start; /* datasegment in flash (also code+rodata end) */
  61 ulong i386boot_romdata_dest  = (ulong)&_i386boot_romdata_dest;  /* data location segment in ram */
  62 ulong i386boot_romdata_size  = (ulong)&_i386boot_romdata_size;  /* size of data segment */
  63 ulong i386boot_bss_start     = (ulong)&_i386boot_bss_start;     /* bss start */
  64 ulong i386boot_bss_size      = (ulong)&_i386boot_bss_size;      /* bss size */
  65
  66 ulong i386boot_realmode      = (ulong)&_i386boot_realmode;      /* start of realmode entry code */
  67 ulong i386boot_realmode_size = (ulong)&_i386boot_realmode_size; /* size of realmode entry code */
  68 ulong i386boot_bios          = (ulong)&_i386boot_bios;          /* start of BIOS emulation code */
  69 ulong i386boot_bios_size     = (ulong)&_i386boot_bios_size;     /* size of BIOS emulation code */
  70
  71
  72 const char version_string[] =
  73         U_BOOT_VERSION" (" __DATE__ " - " __TIME__ ")";
  74
  75
  76 /*
  77  * Begin and End of memory area for malloc(), and current "brk"
  78  */
  79 static ulong mem_malloc_start = 0;
  80 static ulong mem_malloc_end = 0;
  81 static ulong mem_malloc_brk = 0;
  82
  83 static int mem_malloc_init(void)
  84 {
  85         /* start malloc area right after the stack */
  86         mem_malloc_start = i386boot_bss_start +
  87                 i386boot_bss_size + CFG_STACK_SIZE;
  88         mem_malloc_start = (mem_malloc_start+3)&~3;
  89
  90         /* Use all available RAM for malloc() */
  91         mem_malloc_end = gd->ram_size;
  92
  93         mem_malloc_brk = mem_malloc_start;
  94
  95         return 0;
  96 }
  97
  98 void *sbrk (ptrdiff_t increment)
  99 {
 100         ulong old = mem_malloc_brk;
 101         ulong new = old + increment;
 102
 103         if ((new < mem_malloc_start) || (new > mem_malloc_end)) {
 104                 return (NULL);
 105         }
 106         mem_malloc_brk = new;
 107
 108         return ((void *) old);
 109 }
 110
 111 char *strmhz (char *buf, long hz)
 112 {
 113         long l, n;
 114         long m;
 115
 116         n = hz / 1000000L;
 117         l = sprintf (buf, "%ld", n);
 118         m = (hz % 1000000L) / 1000L;
 119         if (m != 0)
 120                 sprintf (buf + l, ".%03ld", m);
 121         return (buf);
 122 }
 123
 124 /************************************************************************
 125  * Init Utilities                                                       *
 126  ************************************************************************
 127  * Some of this code should be moved into the core functions,
 128  * or dropped completely,
 129  * but let's get it working (again) first...
 130  */
 131 static int init_baudrate (void)
 132 {
 133         char tmp[64];   /* long enough for environment variables */
 134         int i = getenv_r("baudrate", tmp, 64);
 135
 136         gd->baudrate = (i != 0)
 137                         ? (int) simple_strtoul (tmp, NULL, 10)
 138                         : CONFIG_BAUDRATE;
 139
 140         return (0);
 141 }
 142
 143 static int display_banner (void)
 144 {
 145
 146         printf ("\n\n%s\n\n", version_string);
 147         printf ("U-Boot code: %08lX -> %08lX  data: %08lX -> %08lX\n"
 148                 "        BSS: %08lX -> %08lX stack: %08lX -> %08lX\n",
 149                 i386boot_start, i386boot_romdata_start-1,
 150                 i386boot_romdata_dest, i386boot_romdata_dest+i386boot_romdata_size-1,
 151                 i386boot_bss_start, i386boot_bss_start+i386boot_bss_size-1,
 152                 i386boot_bss_start+i386boot_bss_size,
 153                 i386boot_bss_start+i386boot_bss_size+CFG_STACK_SIZE-1);
 154
 155
 156         return (0);
 157 }
 158
 159 /*
 160  * WARNING: this code looks "cleaner" than the PowerPC version, but
 161  * has the disadvantage that you either get nothing, or everything.
 162  * On PowerPC, you might see "DRAM: " before the system hangs - which
 163  * gives a simple yet clear indication which part of the
 164  * initialization if failing.
 165  */
 166 static int display_dram_config (void)
 167 {
 168         int i;
 169
 170         puts ("DRAM Configuration:\n");
 171
 172         for (i=0; i<CONFIG_NR_DRAM_BANKS; i++) {
 173                 printf ("Bank #%d: %08lx ", i, gd->bd->bi_dram[i].start);
 174                 print_size (gd->bd->bi_dram[i].size, "\n");
 175         }
 176
 177         return (0);
 178 }
 179
 180 static void display_flash_config (ulong size)
 181 {
 182         puts ("Flash: ");
 183         print_size (size, "\n");
 184 }
 185
 186
 187 /*
 188  * Breath some life into the board...
 189  *
 190  * Initialize an SMC for serial comms, and carry out some hardware
 191  * tests.
 192  *
 193  * The first part of initialization is running from Flash memory;
 194  * its main purpose is to initialize the RAM so that we
 195  * can relocate the monitor code to RAM.
 196  */
 197
 198 /*
 199  * All attempts to come up with a "common" initialization sequence
 200  * that works for all boards and architectures failed: some of the
 201  * requirements are just _too_ different. To get rid of the resulting
 202  * mess of board dependend #ifdef'ed code we now make the whole
 203  * initialization sequence configurable to the user.
 204  *
 205  * The requirements for any new initalization function is simple: it
 206  * receives a pointer to the "global data" structure as it's only
 207  * argument, and returns an integer return code, where 0 means
 208  * "continue" and != 0 means "fatal error, hang the system".
 209  */
 210 typedef int (init_fnc_t) (void);
 211
 212 init_fnc_t *init_sequence[] = {
 213         cpu_init,               /* basic cpu dependent setup */
 214         board_init,             /* basic board dependent setup */
 215         dram_init,              /* configure available RAM banks */
 216         mem_malloc_init,        /* dependant on dram_init */
 217         interrupt_init,         /* set up exceptions */
 218         timer_init,
 219         serial_init,
 220         env_init,               /* initialize environment */
 221         init_baudrate,          /* initialze baudrate settings */
 222         serial_init,            /* serial communications setup */
 223         display_banner,
 224         display_dram_config,
 225
 226         NULL,
 227 };
 228
 229 gd_t *global_data;
 230
 231 void start_i386boot (void)
 232 {
 233         char *s;
 234         int i;
 235         ulong size;
 236         static gd_t gd_data;
 237         static bd_t bd_data;
 238         init_fnc_t **init_fnc_ptr;
 239
 240         show_boot_progress(0x21);
 241
 242         gd = global_data = &gd_data;
 243         /* compiler optimization barrier needed for GCC >= 3.4 */
 244         __asm__ __volatile__("": : :"memory");
 245
 246         memset (gd, 0, sizeof (gd_t));
 247         gd->bd = &bd_data;
 248         memset (gd->bd, 0, sizeof (bd_t));
 249         show_boot_progress(0x22);
 250
 251         gd->baudrate =  CONFIG_BAUDRATE;
 252
 253         for (init_fnc_ptr = init_sequence, i=0; *init_fnc_ptr; ++init_fnc_ptr, i++) {
 254                 show_boot_progress(0xa130|i);
 255
 256                 if ((*init_fnc_ptr)() != 0) {
 257                         hang ();
 258                 }
 259         }
 260         show_boot_progress(0x23);
 261
 262         /* configure available FLASH banks */
 263         size = flash_init();
 264         display_flash_config(size);
 265         show_boot_progress(0x24);
 266
 267         show_boot_progress(0x25);
 268
 269         /* initialize environment */
 270         env_relocate ();
 271         show_boot_progress(0x26);
 272
 273
 274         /* IP Address */
 275         bd_data.bi_ip_addr = getenv_IPaddr ("ipaddr");
 276
 277         /* MAC Address */
 278         {
 279                 int i;
 280                 ulong reg;
 281                 char *s, *e;
 282                 uchar tmp[64];
 283
 284                 i = getenv_r ("ethaddr", tmp, sizeof (tmp));
 285                 s = (i > 0) ? tmp : NULL;
 286
 287                 for (reg = 0; reg < 6; ++reg) {
 288                         bd_data.bi_enetaddr[reg] = s ? simple_strtoul (s, &e, 16) : 0;
 289                         if (s)
 290                                 s = (*e) ? e + 1 : e;
 291                 }
 292         }
 293
 294 #if defined(CONFIG_PCI)
 295         /*
 296          * Do pci configuration
 297          */
 298         pci_init();
 299 #endif
 300
 301         show_boot_progress(0x27);
 302
 303
 304         devices_init ();
 305
 306         jumptable_init ();
 307
 308         /* Initialize the console (after the relocation and devices init) */
 309         console_init_r();
 310
 311 #ifdef CONFIG_MISC_INIT_R
 312         /* miscellaneous platform dependent initialisations */
 313         misc_init_r();
 314 #endif
 315
 316 #if defined(CONFIG_CMD_PCMCIA) && !defined(CONFIG_CMD_IDE)
 317         WATCHDOG_RESET();
 318         puts ("PCMCIA:");
 319         pcmcia_init();
 320 #endif
 321
 322 #if defined(CONFIG_CMD_KGDB)
 323         WATCHDOG_RESET();
 324         puts("KGDB:  ");
 325         kgdb_init();
 326 #endif
 327
 328         /* enable exceptions */
 329         enable_interrupts();
 330         show_boot_progress(0x28);
 331
 332         /* Must happen after interrupts are initialized since
 333          * an irq handler gets installed
 334          */
 335 #ifdef CONFIG_SERIAL_SOFTWARE_FIFO
 336         serial_buffered_init();
 337 #endif
 338
 339 #ifdef CONFIG_STATUS_LED
 340         status_led_set (STATUS_LED_BOOT, STATUS_LED_BLINKING);
 341 #endif
 342
 343         udelay(20);
 344
 345         set_timer (0);
 346
 347         /* Initialize from environment */
 348         if ((s = getenv ("loadaddr")) != NULL) {
 349                 load_addr = simple_strtoul (s, NULL, 16);
 350         }
 351 #if defined(CONFIG_CMD_NET)
 352         if ((s = getenv ("bootfile")) != NULL) {
 353                 copy_filename (BootFile, s, sizeof (BootFile));
 354         }
 355 #endif
 356
 357         WATCHDOG_RESET();
 358
 359 #if defined(CONFIG_CMD_IDE)
 360         WATCHDOG_RESET();
 361         puts("IDE:   ");
 362         ide_init();
 363 #endif
 364
 365 #if defined(CONFIG_CMD_SCSI)
 366         WATCHDOG_RESET();
 367         puts("SCSI:  ");
 368         scsi_init();
 369 #endif
 370
 371 #if defined(CONFIG_CMD_DOC)
 372         WATCHDOG_RESET();
 373         puts("DOC:   ");
 374         doc_init();
 375 #endif
 376
 377 #if defined(CONFIG_CMD_NET)
 378 #if defined(CONFIG_NET_MULTI)
 379         WATCHDOG_RESET();
 380         puts("Net:   ");
 381 #endif
 382         eth_initialize(gd->bd);
 383 #endif
 384
 385 #if ( defined(CONFIG_CMD_NET)) && (0)
 386         WATCHDOG_RESET();
 387 # ifdef DEBUG
 388         puts ("Reset Ethernet PHY\n");
 389 # endif
 390         reset_phy();
 391 #endif
 392
 393 #ifdef CONFIG_LAST_STAGE_INIT
 394         WATCHDOG_RESET();
 395         /*
 396          * Some parts can be only initialized if all others (like
 397          * Interrupts) are up and running (i.e. the PC-style ISA
 398          * keyboard).
 399          */
 400         last_stage_init();
 401 #endif
 402
 403
 404 #ifdef CONFIG_POST
 405         post_run (NULL, POST_RAM | post_bootmode_get(0));
 406 #endif
 407
 408
 409         show_boot_progress(0x29);
 410
 411         /* main_loop() can return to retry autoboot, if so just run it again. */
 412         for (;;) {
 413                 main_loop();
 414         }
 415
 416         /* NOTREACHED - no way out of command loop except booting */
 417 }
 418
 419 void hang (void)
 420 {
 421         puts ("### ERROR ### Please RESET the board ###\n");
 422         for (;;);
 423 }