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 + CONFIG_SYS_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 /************************************************************************
 112  * Init Utilities                                                       *
 113  ************************************************************************
 114  * Some of this code should be moved into the core functions,
 115  * or dropped completely,
 116  * but let's get it working (again) first...
 117  */
 118 static int init_baudrate (void)
 119 {
 120         char tmp[64];   /* long enough for environment variables */
 121         int i = getenv_r("baudrate", tmp, 64);
 122
 123         gd->baudrate = (i != 0)
 124                         ? (int) simple_strtoul (tmp, NULL, 10)
 125                         : CONFIG_BAUDRATE;
 126
 127         return (0);
 128 }
 129
 130 static int display_banner (void)
 131 {
 132
 133         printf ("\n\n%s\n\n", version_string);
 134         printf ("U-Boot code: %08lX -> %08lX  data: %08lX -> %08lX\n"
 135                 "        BSS: %08lX -> %08lX stack: %08lX -> %08lX\n",
 136                 i386boot_start, i386boot_romdata_start-1,
 137                 i386boot_romdata_dest, i386boot_romdata_dest+i386boot_romdata_size-1,
 138                 i386boot_bss_start, i386boot_bss_start+i386boot_bss_size-1,
 139                 i386boot_bss_start+i386boot_bss_size,
 140                 i386boot_bss_start+i386boot_bss_size+CONFIG_SYS_STACK_SIZE-1);
 141
 142
 143         return (0);
 144 }
 145
 146 /*
 147  * WARNING: this code looks "cleaner" than the PowerPC version, but
 148  * has the disadvantage that you either get nothing, or everything.
 149  * On PowerPC, you might see "DRAM: " before the system hangs - which
 150  * gives a simple yet clear indication which part of the
 151  * initialization if failing.
 152  */
 153 static int display_dram_config (void)
 154 {
 155         int i;
 156
 157         puts ("DRAM Configuration:\n");
 158
 159         for (i=0; i<CONFIG_NR_DRAM_BANKS; i++) {
 160                 printf ("Bank #%d: %08lx ", i, gd->bd->bi_dram[i].start);
 161                 print_size (gd->bd->bi_dram[i].size, "\n");
 162         }
 163
 164         return (0);
 165 }
 166
 167 static void display_flash_config (ulong size)
 168 {
 169         puts ("Flash: ");
 170         print_size (size, "\n");
 171 }
 172
 173
 174 /*
 175  * Breath some life into the board...
 176  *
 177  * Initialize an SMC for serial comms, and carry out some hardware
 178  * tests.
 179  *
 180  * The first part of initialization is running from Flash memory;
 181  * its main purpose is to initialize the RAM so that we
 182  * can relocate the monitor code to RAM.
 183  */
 184
 185 /*
 186  * All attempts to come up with a "common" initialization sequence
 187  * that works for all boards and architectures failed: some of the
 188  * requirements are just _too_ different. To get rid of the resulting
 189  * mess of board dependend #ifdef'ed code we now make the whole
 190  * initialization sequence configurable to the user.
 191  *
 192  * The requirements for any new initalization function is simple: it
 193  * receives a pointer to the "global data" structure as it's only
 194  * argument, and returns an integer return code, where 0 means
 195  * "continue" and != 0 means "fatal error, hang the system".
 196  */
 197 typedef int (init_fnc_t) (void);
 198
 199 init_fnc_t *init_sequence[] = {
 200         cpu_init,               /* basic cpu dependent setup */
 201         board_init,             /* basic board dependent setup */
 202         dram_init,              /* configure available RAM banks */
 203         mem_malloc_init,        /* dependant on dram_init */
 204         interrupt_init,         /* set up exceptions */
 205         timer_init,
 206         serial_init,
 207         env_init,               /* initialize environment */
 208         init_baudrate,          /* initialze baudrate settings */
 209         serial_init,            /* serial communications setup */
 210         display_banner,
 211         display_dram_config,
 212
 213         NULL,
 214 };
 215
 216 gd_t *gd;
 217
 218 void start_i386boot (void)
 219 {
 220         char *s;
 221         int i;
 222         ulong size;
 223         static gd_t gd_data;
 224         static bd_t bd_data;
 225         init_fnc_t **init_fnc_ptr;
 226
 227         show_boot_progress(0x21);
 228
 229         gd = &gd_data;
 230         /* compiler optimization barrier needed for GCC >= 3.4 */
 231         __asm__ __volatile__("": : :"memory");
 232
 233         memset (gd, 0, sizeof (gd_t));
 234         gd->bd = &bd_data;
 235         memset (gd->bd, 0, sizeof (bd_t));
 236         show_boot_progress(0x22);
 237
 238         gd->baudrate =  CONFIG_BAUDRATE;
 239
 240         for (init_fnc_ptr = init_sequence, i=0; *init_fnc_ptr; ++init_fnc_ptr, i++) {
 241                 show_boot_progress(0xa130|i);
 242
 243                 if ((*init_fnc_ptr)() != 0) {
 244                         hang ();
 245                 }
 246         }
 247         show_boot_progress(0x23);
 248
 249         /* configure available FLASH banks */
 250         size = flash_init();
 251         display_flash_config(size);
 252         show_boot_progress(0x24);
 253
 254         show_boot_progress(0x25);
 255
 256         /* initialize environment */
 257         env_relocate ();
 258         show_boot_progress(0x26);
 259
 260
 261         /* IP Address */
 262         bd_data.bi_ip_addr = getenv_IPaddr ("ipaddr");
 263
 264         /* MAC Address */
 265         {
 266                 int i;
 267                 ulong reg;
 268                 char *s, *e;
 269                 char tmp[64];
 270
 271                 i = getenv_r ("ethaddr", tmp, sizeof (tmp));
 272                 s = (i > 0) ? tmp : NULL;
 273
 274                 for (reg = 0; reg < 6; ++reg) {
 275                         bd_data.bi_enetaddr[reg] = s ? simple_strtoul (s, &e, 16) : 0;
 276                         if (s)
 277                                 s = (*e) ? e + 1 : e;
 278                 }
 279         }
 280
 281 #if defined(CONFIG_PCI)
 282         /*
 283          * Do pci configuration
 284          */
 285         pci_init();
 286 #endif
 287
 288         show_boot_progress(0x27);
 289
 290
 291         devices_init ();
 292
 293         jumptable_init ();
 294
 295         /* Initialize the console (after the relocation and devices init) */
 296         console_init_r();
 297
 298 #ifdef CONFIG_MISC_INIT_R
 299         /* miscellaneous platform dependent initialisations */
 300         misc_init_r();
 301 #endif
 302
 303 #if defined(CONFIG_CMD_PCMCIA) && !defined(CONFIG_CMD_IDE)
 304         WATCHDOG_RESET();
 305         puts ("PCMCIA:");
 306         pcmcia_init();
 307 #endif
 308
 309 #if defined(CONFIG_CMD_KGDB)
 310         WATCHDOG_RESET();
 311         puts("KGDB:  ");
 312         kgdb_init();
 313 #endif
 314
 315         /* enable exceptions */
 316         enable_interrupts();
 317         show_boot_progress(0x28);
 318
 319         /* Must happen after interrupts are initialized since
 320          * an irq handler gets installed
 321          */
 322 #ifdef CONFIG_SERIAL_SOFTWARE_FIFO
 323         serial_buffered_init();
 324 #endif
 325
 326 #ifdef CONFIG_STATUS_LED
 327         status_led_set (STATUS_LED_BOOT, STATUS_LED_BLINKING);
 328 #endif
 329
 330         udelay(20);
 331
 332         set_timer (0);
 333
 334         /* Initialize from environment */
 335         if ((s = getenv ("loadaddr")) != NULL) {
 336                 load_addr = simple_strtoul (s, NULL, 16);
 337         }
 338 #if defined(CONFIG_CMD_NET)
 339         if ((s = getenv ("bootfile")) != NULL) {
 340                 copy_filename (BootFile, s, sizeof (BootFile));
 341         }
 342 #endif
 343
 344         WATCHDOG_RESET();
 345
 346 #if defined(CONFIG_CMD_IDE)
 347         WATCHDOG_RESET();
 348         puts("IDE:   ");
 349         ide_init();
 350 #endif
 351
 352 #if defined(CONFIG_CMD_SCSI)
 353         WATCHDOG_RESET();
 354         puts("SCSI:  ");
 355         scsi_init();
 356 #endif
 357
 358 #if defined(CONFIG_CMD_DOC)
 359         WATCHDOG_RESET();
 360         puts("DOC:   ");
 361         doc_init();
 362 #endif
 363
 364 #if defined(CONFIG_CMD_NET)
 365 #if defined(CONFIG_NET_MULTI)
 366         WATCHDOG_RESET();
 367         puts("Net:   ");
 368 #endif
 369         eth_initialize(gd->bd);
 370 #endif
 371
 372 #if ( defined(CONFIG_CMD_NET)) && (0)
 373         WATCHDOG_RESET();
 374 # ifdef DEBUG
 375         puts ("Reset Ethernet PHY\n");
 376 # endif
 377         reset_phy();
 378 #endif
 379
 380 #ifdef CONFIG_LAST_STAGE_INIT
 381         WATCHDOG_RESET();
 382         /*
 383          * Some parts can be only initialized if all others (like
 384          * Interrupts) are up and running (i.e. the PC-style ISA
 385          * keyboard).
 386          */
 387         last_stage_init();
 388 #endif
 389
 390
 391 #ifdef CONFIG_POST
 392         post_run (NULL, POST_RAM | post_bootmode_get(0));
 393 #endif
 394
 395
 396         show_boot_progress(0x29);
 397
 398         /* main_loop() can return to retry autoboot, if so just run it again. */
 399         for (;;) {
 400                 main_loop();
 401         }
 402
 403         /* NOTREACHED - no way out of command loop except booting */
 404 }
 405
 406 void hang (void)
 407 {
 408         puts ("### ERROR ### Please RESET the board ###\n");
 409         for (;;);
 410 }
 411
 412 unsigned long do_go_exec (ulong (*entry)(int, char *[]), int argc, char *argv[])
 413 {
 414         /*
 415          * TODO: Test this function - changed to fix compiler error.
 416          * Original code was:
 417          *   return (entry >> 1) (argc, argv);
 418          * with a comment about Nios function pointers are address >> 1
 419          */
 420         return (entry) (argc, argv);
 421 }