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 <syscall.h>
  38 #include <net.h>
  39 #include <ide.h>
  40 #include <asm/u-boot-i386.h>
  41
  42 extern long _i386boot_start;
  43 extern long _i386boot_end;
  44 extern long _i386boot_romdata_start;
  45 extern long _i386boot_romdata_dest;
  46 extern long _i386boot_romdata_size;
  47 extern long _i386boot_bss_start;
  48 extern long _i386boot_bss_size;
  49
  50 extern long _i386boot_realmode;
  51 extern long _i386boot_realmode_size;
  52 extern long _i386boot_bios;
  53 extern long _i386boot_bios_size;
  54
  55 /* The symbols defined by the linker script becomes pointers
  56  * which is somewhat inconveient ... */
  57 ulong i386boot_start         = (ulong)&_i386boot_start;         /* code start (in flash) defined in start.S */
  58 ulong i386boot_end           = (ulong)&_i386boot_end;           /* code end (in flash) */
  59 ulong i386boot_romdata_start = (ulong)&_i386boot_romdata_start; /* datasegment in flash (also code+rodata end) */
  60 ulong i386boot_romdata_dest  = (ulong)&_i386boot_romdata_dest;  /* data location segment in ram */
  61 ulong i386boot_romdata_size  = (ulong)&_i386boot_romdata_size;  /* size of data segment */
  62 ulong i386boot_bss_start     = (ulong)&_i386boot_bss_start;     /* bss start */
  63 ulong i386boot_bss_size      = (ulong)&_i386boot_bss_size;      /* bss size */
  64
  65 ulong i386boot_realmode      = (ulong)&_i386boot_realmode;      /* start of realmode entry code */
  66 ulong i386boot_realmode_size = (ulong)&_i386boot_realmode_size; /* size of realmode entry code */
  67 ulong i386boot_bios          = (ulong)&_i386boot_bios;          /* start of BIOS emulation code */
  68 ulong i386boot_bios_size     = (ulong)&_i386boot_bios_size;     /* size of BIOS emulation code */
  69
  70
  71 const char version_string[] =
  72         U_BOOT_VERSION" (" __DATE__ " - " __TIME__ ")";
  73
  74
  75 /*
  76  * Begin and End of memory area for malloc(), and current "brk"
  77  */
  78 static ulong mem_malloc_start = 0;
  79 static ulong mem_malloc_end = 0;
  80 static ulong mem_malloc_brk = 0;
  81
  82 static int mem_malloc_init(void)
  83 {
  84         DECLARE_GLOBAL_DATA_PTR;
  85
  86         /* start malloc area right after the stack */
  87         mem_malloc_start = i386boot_bss_start +
  88                 i386boot_bss_size + CFG_STACK_SIZE;
  89         mem_malloc_start = (mem_malloc_start+3)&~3;
  90
  91         /* Use all available RAM for malloc() */
  92         mem_malloc_end = gd->ram_size;
  93
  94         mem_malloc_brk = mem_malloc_start;
  95
  96         return 0;
  97 }
  98
  99 void *sbrk (ptrdiff_t increment)
 100 {
 101         ulong old = mem_malloc_brk;
 102         ulong new = old + increment;
 103
 104         if ((new < mem_malloc_start) || (new > mem_malloc_end)) {
 105                 return (NULL);
 106         }
 107         mem_malloc_brk = new;
 108
 109         return ((void *) old);
 110 }
 111
 112 char *strmhz (char *buf, long hz)
 113 {
 114         long l, n;
 115         long m;
 116
 117         n = hz / 1000000L;
 118         l = sprintf (buf, "%ld", n);
 119         m = (hz % 1000000L) / 1000L;
 120         if (m != 0)
 121                 sprintf (buf + l, ".%03ld", m);
 122         return (buf);
 123 }
 124
 125 /************************************************************************
 126  * Init Utilities                                                       *
 127  ************************************************************************
 128  * Some of this code should be moved into the core functions,
 129  * or dropped completely,
 130  * but let's get it working (again) first...
 131  */
 132 static void syscalls_init (void)
 133 {
 134         syscall_tbl[SYSCALL_MALLOC] = (void *) malloc;
 135         syscall_tbl[SYSCALL_FREE] = (void *) free;
 136
 137         syscall_tbl[SYSCALL_INSTALL_HDLR] = (void *) irq_install_handler;
 138         syscall_tbl[SYSCALL_FREE_HDLR] = (void *) irq_free_handler;
 139
 140 }
 141
 142 static int init_baudrate (void)
 143 {
 144         DECLARE_GLOBAL_DATA_PTR;
 145
 146         char tmp[64];   /* long enough for environment variables */
 147         int i = getenv_r("baudrate", tmp, 64);
 148
 149         gd->baudrate = (i != 0)
 150                         ? (int) simple_strtoul (tmp, NULL, 10)
 151                         : CONFIG_BAUDRATE;
 152
 153         return (0);
 154 }
 155
 156 static int display_banner (void)
 157 {
 158
 159         printf ("\n\n%s\n\n", version_string);
 160         printf ("U-Boot code: %08lX -> %08lX  data: %08lX -> %08lX\n"
 161                 "        BSS: %08lX -> %08lX stack: %08lX -> %08lX\n",
 162                 i386boot_start, i386boot_romdata_start-1,
 163                 i386boot_romdata_dest, i386boot_romdata_dest+i386boot_romdata_size-1,
 164                 i386boot_bss_start, i386boot_bss_start+i386boot_bss_size-1,
 165                 i386boot_bss_start+i386boot_bss_size,
 166                 i386boot_bss_start+i386boot_bss_size+CFG_STACK_SIZE-1);
 167
 168
 169         return (0);
 170 }
 171
 172 /*
 173  * WARNING: this code looks "cleaner" than the PowerPC version, but
 174  * has the disadvantage that you either get nothing, or everything.
 175  * On PowerPC, you might see "DRAM: " before the system hangs - which
 176  * gives a simple yet clear indication which part of the
 177  * initialization if failing.
 178  */
 179 static int display_dram_config (void)
 180 {
 181         DECLARE_GLOBAL_DATA_PTR;
 182         int i;
 183
 184         puts ("DRAM Configuration:\n");
 185
 186         for (i=0; i<CONFIG_NR_DRAM_BANKS; i++) {
 187                 printf ("Bank #%d: %08lx ", i, gd->bd->bi_dram[i].start);
 188                 print_size (gd->bd->bi_dram[i].size, "\n");
 189         }
 190
 191         return (0);
 192 }
 193
 194 static void display_flash_config (ulong size)
 195 {
 196         puts ("Flash: ");
 197         print_size (size, "\n");
 198 }
 199
 200
 201 /*
 202  * Breath some life into the board...
 203  *
 204  * Initialize an SMC for serial comms, and carry out some hardware
 205  * tests.
 206  *
 207  * The first part of initialization is running from Flash memory;
 208  * its main purpose is to initialize the RAM so that we
 209  * can relocate the monitor code to RAM.
 210  */
 211
 212 /*
 213  * All attempts to come up with a "common" initialization sequence
 214  * that works for all boards and architectures failed: some of the
 215  * requirements are just _too_ different. To get rid of the resulting
 216  * mess of board dependend #ifdef'ed code we now make the whole
 217  * initialization sequence configurable to the user.
 218  *
 219  * The requirements for any new initalization function is simple: it
 220  * receives a pointer to the "global data" structure as it's only
 221  * argument, and returns an integer return code, where 0 means
 222  * "continue" and != 0 means "fatal error, hang the system".
 223  */
 224 typedef int (init_fnc_t) (void);
 225
 226 init_fnc_t *init_sequence[] = {
 227         cpu_init,               /* basic cpu dependent setup */
 228         board_init,             /* basic board dependent setup */
 229         dram_init,              /* configure available RAM banks */
 230         mem_malloc_init,        /* dependant on dram_init */
 231         interrupt_init,         /* set up exceptions */
 232         timer_init,
 233         serial_init,
 234         env_init,               /* initialize environment */
 235         init_baudrate,          /* initialze baudrate settings */
 236         serial_init,            /* serial communications setup */
 237         display_banner,
 238         display_dram_config,
 239
 240         NULL,
 241 };
 242
 243 gd_t *global_data;
 244
 245 void start_i386boot (void)
 246 {
 247         DECLARE_GLOBAL_DATA_PTR;
 248         char *s;
 249         int i;
 250         ulong size;
 251         static gd_t gd_data;
 252         static bd_t bd_data;
 253         init_fnc_t **init_fnc_ptr;
 254
 255         show_boot_progress(0x21);
 256
 257         gd = global_data = &gd_data;
 258
 259         memset (gd, 0, sizeof (gd_t));
 260         gd->bd = &bd_data;
 261         memset (gd->bd, 0, sizeof (bd_t));
 262         show_boot_progress(0x22);
 263
 264         gd->baudrate =  CONFIG_BAUDRATE;
 265
 266         for (init_fnc_ptr = init_sequence, i=0; *init_fnc_ptr; ++init_fnc_ptr, i++) {
 267                 show_boot_progress(0xa130|i);
 268
 269                 if ((*init_fnc_ptr)() != 0) {
 270                         hang ();
 271                 }
 272         }
 273         show_boot_progress(0x23);
 274
 275         /* configure available FLASH banks */
 276         size = flash_init();
 277         display_flash_config(size);
 278         show_boot_progress(0x24);
 279
 280         show_boot_progress(0x25);
 281
 282         /* initialize environment */
 283         env_relocate ();
 284         show_boot_progress(0x26);
 285
 286
 287         /* IP Address */
 288         bd_data.bi_ip_addr = getenv_IPaddr ("ipaddr");
 289
 290         /* MAC Address */
 291         {
 292                 int i;
 293                 ulong reg;
 294                 char *s, *e;
 295                 uchar tmp[64];
 296
 297                 i = getenv_r ("ethaddr", tmp, sizeof (tmp));
 298                 s = (i > 0) ? tmp : NULL;
 299
 300                 for (reg = 0; reg < 6; ++reg) {
 301                         bd_data.bi_enetaddr[reg] = s ? simple_strtoul (s, &e, 16) : 0;
 302                         if (s)
 303                                 s = (*e) ? e + 1 : e;
 304                 }
 305         }
 306
 307 #if defined(CONFIG_PCI)
 308         /*
 309          * Do pci configuration
 310          */
 311         pci_init();
 312 #endif
 313
 314         show_boot_progress(0x27);
 315
 316
 317         devices_init ();
 318
 319         /* allocate syscalls table (console_init_r will fill it in */
 320         syscall_tbl = (void **) malloc (NR_SYSCALLS * sizeof (void *));
 321         memset(syscall_tbl, 0, NR_SYSCALLS * sizeof (void *));
 322
 323         /* Initialize the console (after the relocation and devices init) */
 324         console_init_r();
 325         syscalls_init();
 326
 327 #ifdef CONFIG_MISC_INIT_R
 328         /* miscellaneous platform dependent initialisations */
 329         misc_init_r();
 330 #endif
 331
 332
 333 #if (CONFIG_COMMANDS & CFG_CMD_NET) && (0)
 334         WATCHDOG_RESET();
 335 # ifdef DEBUG
 336         puts ("Reset Ethernet PHY\n");
 337 # endif
 338         reset_phy();
 339 #endif
 340
 341 #if (CONFIG_COMMANDS & CFG_CMD_PCMCIA) && !(CONFIG_COMMANDS & CFG_CMD_IDE)
 342         WATCHDOG_RESET();
 343         puts ("PCMCIA:");
 344         pcmcia_init();
 345 #endif
 346
 347 #if (CONFIG_COMMANDS & CFG_CMD_KGDB)
 348         WATCHDOG_RESET();
 349         puts("KGDB:  ");
 350         kgdb_init();
 351 #endif
 352
 353         /* enable exceptions */
 354         enable_interrupts();
 355         show_boot_progress(0x28);
 356
 357         /* Must happen after interrupts are initialized since
 358          * an irq handler gets installed
 359          */
 360 #ifdef CONFIG_SERIAL_SOFTWARE_FIFO
 361         serial_buffered_init();
 362 #endif
 363
 364 #ifdef CONFIG_STATUS_LED
 365         status_led_set (STATUS_LED_BOOT, STATUS_LED_BLINKING);
 366 #endif
 367
 368         udelay(20);
 369
 370         set_timer (0);
 371
 372         /* Initialize from environment */
 373         if ((s = getenv ("loadaddr")) != NULL) {
 374                 load_addr = simple_strtoul (s, NULL, 16);
 375         }
 376 #if (CONFIG_COMMANDS & CFG_CMD_NET)
 377         if ((s = getenv ("bootfile")) != NULL) {
 378                 copy_filename (BootFile, s, sizeof (BootFile));
 379         }
 380 #endif /* CFG_CMD_NET */
 381
 382         WATCHDOG_RESET();
 383
 384 #if (CONFIG_COMMANDS & CFG_CMD_IDE)
 385         WATCHDOG_RESET();
 386         puts("IDE:   ");
 387         ide_init();
 388 #endif /* CFG_CMD_IDE */
 389
 390 #if (CONFIG_COMMANDS & CFG_CMD_SCSI)
 391         WATCHDOG_RESET();
 392         puts("SCSI:  ");
 393         scsi_init();
 394 #endif
 395
 396 #if (CONFIG_COMMANDS & CFG_CMD_DOC)
 397         WATCHDOG_RESET();
 398         puts("DOC:   ");
 399         doc_init();
 400 #endif
 401
 402 #if (CONFIG_COMMANDS & CFG_CMD_NET) && defined(CONFIG_NET_MULTI)
 403         WATCHDOG_RESET();
 404         puts("Net:   ");
 405         eth_initialize(gd->bd);
 406 #endif
 407
 408 #ifdef CONFIG_LAST_STAGE_INIT
 409         WATCHDOG_RESET();
 410         /*
 411          * Some parts can be only initialized if all others (like
 412          * Interrupts) are up and running (i.e. the PC-style ISA
 413          * keyboard).
 414          */
 415         last_stage_init();
 416 #endif
 417
 418
 419 #ifdef CONFIG_POST
 420         post_run (NULL, POST_RAM | post_bootmode_get(0));
 421         if (post_bootmode_get(0) & POST_POWERFAIL) {
 422                 post_bootmode_clear();
 423                 board_poweroff();
 424         }
 425 #endif
 426
 427
 428         show_boot_progress(0x29);
 429
 430         /* main_loop() can return to retry autoboot, if so just run it again. */
 431         for (;;) {
 432                 main_loop();
 433         }
 434
 435         /* NOTREACHED - no way out of command loop except booting */
 436 }
 437
 438 void hang (void)
 439 {
 440         puts ("### ERROR ### Please RESET the board ###\n");
 441         for (;;);
 442 }