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 extern long _i386boot_start;
  42 extern long _i386boot_end;
  43 extern long _i386boot_romdata_start;
  44 extern long _i386boot_romdata_dest;
  45 extern long _i386boot_romdata_size;
  46 extern long _i386boot_bss_start;
  47 extern long _i386boot_bss_size;
  48
  49 extern long _i386boot_realmode;
  50 extern long _i386boot_realmode_size;
  51 extern long _i386boot_bios;
  52 extern long _i386boot_bios_size;
  53
  54 /* The symbols defined by the linker script becomes pointers
  55  * which is somewhat inconveient ... */
  56 ulong i386boot_start         = (ulong)&_i386boot_start;         /* code start (in flash) defined in start.S */
  57 ulong i386boot_end           = (ulong)&_i386boot_end;           /* code end (in flash) */
  58 ulong i386boot_romdata_start = (ulong)&_i386boot_romdata_start; /* datasegment in flash (also code+rodata end) */
  59 ulong i386boot_romdata_dest  = (ulong)&_i386boot_romdata_dest;  /* data location segment in ram */
  60 ulong i386boot_romdata_size  = (ulong)&_i386boot_romdata_size;  /* size of data segment */
  61 ulong i386boot_bss_start     = (ulong)&_i386boot_bss_start;     /* bss start */
  62 ulong i386boot_bss_size      = (ulong)&_i386boot_bss_size;      /* bss size */
  63
  64 ulong i386boot_realmode      = (ulong)&_i386boot_realmode;      /* start of realmode entry code */
  65 ulong i386boot_realmode_size = (ulong)&_i386boot_realmode_size; /* size of realmode entry code */
  66 ulong i386boot_bios          = (ulong)&_i386boot_bios;          /* start of BIOS emulation code */
  67 ulong i386boot_bios_size     = (ulong)&_i386boot_bios_size;     /* size of BIOS emulation code */
  68
  69
  70 const char version_string[] =
  71         U_BOOT_VERSION" (" __DATE__ " - " __TIME__ ")";
  72
  73
  74 /*
  75  * Begin and End of memory area for malloc(), and current "brk"
  76  */
  77 static ulong mem_malloc_start = 0;
  78 static ulong mem_malloc_end = 0;
  79 static ulong mem_malloc_brk = 0;
  80
  81 static int mem_malloc_init(void)
  82 {
  83         DECLARE_GLOBAL_DATA_PTR;
  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         DECLARE_GLOBAL_DATA_PTR;
 134
 135         char tmp[64];   /* long enough for environment variables */
 136         int i = getenv_r("baudrate", tmp, 64);
 137
 138         gd->baudrate = (i != 0)
 139                         ? (int) simple_strtoul (tmp, NULL, 10)
 140                         : CONFIG_BAUDRATE;
 141
 142         return (0);
 143 }
 144
 145 static int display_banner (void)
 146 {
 147
 148         printf ("\n\n%s\n\n", version_string);
 149         printf ("U-Boot code: %08lX -> %08lX  data: %08lX -> %08lX\n"
 150                 "        BSS: %08lX -> %08lX stack: %08lX -> %08lX\n",
 151                 i386boot_start, i386boot_romdata_start-1,
 152                 i386boot_romdata_dest, i386boot_romdata_dest+i386boot_romdata_size-1,
 153                 i386boot_bss_start, i386boot_bss_start+i386boot_bss_size-1,
 154                 i386boot_bss_start+i386boot_bss_size,
 155                 i386boot_bss_start+i386boot_bss_size+CFG_STACK_SIZE-1);
 156
 157
 158         return (0);
 159 }
 160
 161 /*
 162  * WARNING: this code looks "cleaner" than the PowerPC version, but
 163  * has the disadvantage that you either get nothing, or everything.
 164  * On PowerPC, you might see "DRAM: " before the system hangs - which
 165  * gives a simple yet clear indication which part of the
 166  * initialization if failing.
 167  */
 168 static int display_dram_config (void)
 169 {
 170         DECLARE_GLOBAL_DATA_PTR;
 171         int i;
 172
 173         puts ("DRAM Configuration:\n");
 174
 175         for (i=0; i<CONFIG_NR_DRAM_BANKS; i++) {
 176                 printf ("Bank #%d: %08lx ", i, gd->bd->bi_dram[i].start);
 177                 print_size (gd->bd->bi_dram[i].size, "\n");
 178         }
 179
 180         return (0);
 181 }
 182
 183 static void display_flash_config (ulong size)
 184 {
 185         puts ("Flash: ");
 186         print_size (size, "\n");
 187 }
 188
 189
 190 /*
 191  * Breath some life into the board...
 192  *
 193  * Initialize an SMC for serial comms, and carry out some hardware
 194  * tests.
 195  *
 196  * The first part of initialization is running from Flash memory;
 197  * its main purpose is to initialize the RAM so that we
 198  * can relocate the monitor code to RAM.
 199  */
 200
 201 /*
 202  * All attempts to come up with a "common" initialization sequence
 203  * that works for all boards and architectures failed: some of the
 204  * requirements are just _too_ different. To get rid of the resulting
 205  * mess of board dependend #ifdef'ed code we now make the whole
 206  * initialization sequence configurable to the user.
 207  *
 208  * The requirements for any new initalization function is simple: it
 209  * receives a pointer to the "global data" structure as it's only
 210  * argument, and returns an integer return code, where 0 means
 211  * "continue" and != 0 means "fatal error, hang the system".
 212  */
 213 typedef int (init_fnc_t) (void);
 214
 215 init_fnc_t *init_sequence[] = {
 216         cpu_init,               /* basic cpu dependent setup */
 217         board_init,             /* basic board dependent setup */
 218         dram_init,              /* configure available RAM banks */
 219         mem_malloc_init,        /* dependant on dram_init */
 220         interrupt_init,         /* set up exceptions */
 221         timer_init,
 222         serial_init,
 223         env_init,               /* initialize environment */
 224         init_baudrate,          /* initialze baudrate settings */
 225         serial_init,            /* serial communications setup */
 226         display_banner,
 227         display_dram_config,
 228
 229         NULL,
 230 };
 231
 232 gd_t *global_data;
 233
 234 void start_i386boot (void)
 235 {
 236         DECLARE_GLOBAL_DATA_PTR;
 237         char *s;
 238         int i;
 239         ulong size;
 240         static gd_t gd_data;
 241         static bd_t bd_data;
 242         init_fnc_t **init_fnc_ptr;
 243
 244         show_boot_progress(0x21);
 245
 246         gd = global_data = &gd_data;
 247         /* compiler optimization barrier needed for GCC >= 3.4 */
 248         __asm__ __volatile__("": : :"memory");
 249
 250         memset (gd, 0, sizeof (gd_t));
 251         gd->bd = &bd_data;
 252         memset (gd->bd, 0, sizeof (bd_t));
 253         show_boot_progress(0x22);
 254
 255         gd->baudrate =  CONFIG_BAUDRATE;
 256
 257         for (init_fnc_ptr = init_sequence, i=0; *init_fnc_ptr; ++init_fnc_ptr, i++) {
 258                 show_boot_progress(0xa130|i);
 259
 260                 if ((*init_fnc_ptr)() != 0) {
 261                         hang ();
 262                 }
 263         }
 264         show_boot_progress(0x23);
 265
 266         /* configure available FLASH banks */
 267         size = flash_init();
 268         display_flash_config(size);
 269         show_boot_progress(0x24);
 270
 271         show_boot_progress(0x25);
 272
 273         /* initialize environment */
 274         env_relocate ();
 275         show_boot_progress(0x26);
 276
 277
 278         /* IP Address */
 279         bd_data.bi_ip_addr = getenv_IPaddr ("ipaddr");
 280
 281         /* MAC Address */
 282         {
 283                 int i;
 284                 ulong reg;
 285                 char *s, *e;
 286                 uchar tmp[64];
 287
 288                 i = getenv_r ("ethaddr", tmp, sizeof (tmp));
 289                 s = (i > 0) ? tmp : NULL;
 290
 291                 for (reg = 0; reg < 6; ++reg) {
 292                         bd_data.bi_enetaddr[reg] = s ? simple_strtoul (s, &e, 16) : 0;
 293                         if (s)
 294                                 s = (*e) ? e + 1 : e;
 295                 }
 296         }
 297
 298 #if defined(CONFIG_PCI)
 299         /*
 300          * Do pci configuration
 301          */
 302         pci_init();
 303 #endif
 304
 305         show_boot_progress(0x27);
 306
 307
 308         devices_init ();
 309
 310         jumptable_init ();
 311
 312         /* Initialize the console (after the relocation and devices init) */
 313         console_init_r();
 314
 315 #ifdef CONFIG_MISC_INIT_R
 316         /* miscellaneous platform dependent initialisations */
 317         misc_init_r();
 318 #endif
 319
 320 #if (CONFIG_COMMANDS & CFG_CMD_PCMCIA) && !(CONFIG_COMMANDS & CFG_CMD_IDE)
 321         WATCHDOG_RESET();
 322         puts ("PCMCIA:");
 323         pcmcia_init();
 324 #endif
 325
 326 #if (CONFIG_COMMANDS & CFG_CMD_KGDB)
 327         WATCHDOG_RESET();
 328         puts("KGDB:  ");
 329         kgdb_init();
 330 #endif
 331
 332         /* enable exceptions */
 333         enable_interrupts();
 334         show_boot_progress(0x28);
 335
 336         /* Must happen after interrupts are initialized since
 337          * an irq handler gets installed
 338          */
 339 #ifdef CONFIG_SERIAL_SOFTWARE_FIFO
 340         serial_buffered_init();
 341 #endif
 342
 343 #ifdef CONFIG_STATUS_LED
 344         status_led_set (STATUS_LED_BOOT, STATUS_LED_BLINKING);
 345 #endif
 346
 347         udelay(20);
 348
 349         set_timer (0);
 350
 351         /* Initialize from environment */
 352         if ((s = getenv ("loadaddr")) != NULL) {
 353                 load_addr = simple_strtoul (s, NULL, 16);
 354         }
 355 #if (CONFIG_COMMANDS & CFG_CMD_NET)
 356         if ((s = getenv ("bootfile")) != NULL) {
 357                 copy_filename (BootFile, s, sizeof (BootFile));
 358         }
 359 #endif /* CFG_CMD_NET */
 360
 361         WATCHDOG_RESET();
 362
 363 #if (CONFIG_COMMANDS & CFG_CMD_IDE)
 364         WATCHDOG_RESET();
 365         puts("IDE:   ");
 366         ide_init();
 367 #endif /* CFG_CMD_IDE */
 368
 369 #if (CONFIG_COMMANDS & CFG_CMD_SCSI)
 370         WATCHDOG_RESET();
 371         puts("SCSI:  ");
 372         scsi_init();
 373 #endif
 374
 375 #if (CONFIG_COMMANDS & CFG_CMD_DOC)
 376         WATCHDOG_RESET();
 377         puts("DOC:   ");
 378         doc_init();
 379 #endif
 380
 381 #if (CONFIG_COMMANDS & CFG_CMD_NET)
 382 #if defined(CONFIG_NET_MULTI)
 383         WATCHDOG_RESET();
 384         puts("Net:   ");
 385 #endif
 386         eth_initialize(gd->bd);
 387 #endif
 388
 389 #if (CONFIG_COMMANDS & CFG_CMD_NET) && (0)
 390         WATCHDOG_RESET();
 391 # ifdef DEBUG
 392         puts ("Reset Ethernet PHY\n");
 393 # endif
 394         reset_phy();
 395 #endif
 396
 397 #ifdef CONFIG_LAST_STAGE_INIT
 398         WATCHDOG_RESET();
 399         /*
 400          * Some parts can be only initialized if all others (like
 401          * Interrupts) are up and running (i.e. the PC-style ISA
 402          * keyboard).
 403          */
 404         last_stage_init();
 405 #endif
 406
 407
 408 #ifdef CONFIG_POST
 409         post_run (NULL, POST_RAM | post_bootmode_get(0));
 410 #endif
 411
 412
 413         show_boot_progress(0x29);
 414
 415         /* main_loop() can return to retry autoboot, if so just run it again. */
 416         for (;;) {
 417                 main_loop();
 418         }
 419
 420         /* NOTREACHED - no way out of command loop except booting */
 421 }
 422
 423 void hang (void)
 424 {
 425         puts ("### ERROR ### Please RESET the board ###\n");
 426         for (;;);
 427 }