lib_i386/board.c

   1 /*
   2  * (C) Copyright 2002
   3  * Daniel Engstr�m, 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 <stdio_dev.h>
  35 #include <timestamp.h>
  36 #include <version.h>
  37 #include <malloc.h>
  38 #include <net.h>
  39 #include <ide.h>
  40 #include <asm/u-boot-i386.h>
  41
  42 #ifdef CONFIG_BITBANGMII
  43 #include <miiphy.h>
  44 #endif
  45
  46 DECLARE_GLOBAL_DATA_PTR;
  47
  48 extern long _i386boot_start;
  49 extern long _i386boot_end;
  50 extern long _i386boot_romdata_start;
  51 extern long _i386boot_romdata_dest;
  52 extern long _i386boot_romdata_size;
  53 extern long _i386boot_bss_start;
  54 extern long _i386boot_bss_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 const char version_string[] =
  67         U_BOOT_VERSION" (" U_BOOT_DATE " - " U_BOOT_TIME ")";
  68
  69 static int heap_init(void)
  70 {
  71         /* start malloc area right after the stack */
  72         ulong start = i386boot_bss_start + i386boot_bss_size +
  73                         CONFIG_SYS_STACK_SIZE;
  74
  75         /* 4-byte aligned */
  76         start = (start+3)&~3;
  77
  78         mem_malloc_init(start, CONFIG_SYS_MALLOC_LEN);
  79
  80         return 0;
  81 }
  82
  83 /************************************************************************
  84  * Init Utilities                                                       *
  85  ************************************************************************
  86  * Some of this code should be moved into the core functions,
  87  * or dropped completely,
  88  * but let's get it working (again) first...
  89  */
  90 static int init_baudrate (void)
  91 {
  92         char tmp[64];   /* long enough for environment variables */
  93         int i = getenv_r("baudrate", tmp, 64);
  94
  95         gd->baudrate = (i != 0)
  96                         ? (int) simple_strtoul (tmp, NULL, 10)
  97                         : CONFIG_BAUDRATE;
  98
  99         return (0);
 100 }
 101
 102 static int display_banner (void)
 103 {
 104
 105         printf ("\n\n%s\n\n", version_string);
 106         printf ("U-Boot code: %08lX -> %08lX  data: %08lX -> %08lX\n"
 107                 "        BSS: %08lX -> %08lX stack: %08lX -> %08lX\n",
 108                 i386boot_start, i386boot_romdata_start-1,
 109                 i386boot_romdata_dest, i386boot_romdata_dest+i386boot_romdata_size-1,
 110                 i386boot_bss_start, i386boot_bss_start+i386boot_bss_size-1,
 111                 i386boot_bss_start+i386boot_bss_size,
 112                 i386boot_bss_start+i386boot_bss_size+CONFIG_SYS_STACK_SIZE-1);
 113
 114
 115         return (0);
 116 }
 117
 118 /*
 119  * WARNING: this code looks "cleaner" than the PowerPC version, but
 120  * has the disadvantage that you either get nothing, or everything.
 121  * On PowerPC, you might see "DRAM: " before the system hangs - which
 122  * gives a simple yet clear indication which part of the
 123  * initialization if failing.
 124  */
 125 static int display_dram_config (void)
 126 {
 127         int i;
 128
 129         puts ("DRAM Configuration:\n");
 130
 131         for (i=0; i<CONFIG_NR_DRAM_BANKS; i++) {
 132                 printf ("Bank #%d: %08lx ", i, gd->bd->bi_dram[i].start);
 133                 print_size (gd->bd->bi_dram[i].size, "\n");
 134         }
 135
 136         return (0);
 137 }
 138
 139 static void display_flash_config (ulong size)
 140 {
 141         puts ("Flash: ");
 142         print_size (size, "\n");
 143 }
 144
 145
 146 /*
 147  * Breath some life into the board...
 148  *
 149  * Initialize an SMC for serial comms, and carry out some hardware
 150  * tests.
 151  *
 152  * The first part of initialization is running from Flash memory;
 153  * its main purpose is to initialize the RAM so that we
 154  * can relocate the monitor code to RAM.
 155  */
 156
 157 /*
 158  * All attempts to come up with a "common" initialization sequence
 159  * that works for all boards and architectures failed: some of the
 160  * requirements are just _too_ different. To get rid of the resulting
 161  * mess of board dependend #ifdef'ed code we now make the whole
 162  * initialization sequence configurable to the user.
 163  *
 164  * The requirements for any new initalization function is simple: it
 165  * receives a pointer to the "global data" structure as it's only
 166  * argument, and returns an integer return code, where 0 means
 167  * "continue" and != 0 means "fatal error, hang the system".
 168  */
 169 typedef int (init_fnc_t) (void);
 170
 171 init_fnc_t *init_sequence[] = {
 172         cpu_init,               /* basic cpu dependent setup */
 173         board_init,             /* basic board dependent setup */
 174         dram_init,              /* configure available RAM banks */
 175         heap_init,              /* dependant on dram_init */
 176         interrupt_init,         /* set up exceptions */
 177         timer_init,
 178         serial_init,
 179         env_init,               /* initialize environment */
 180         init_baudrate,          /* initialze baudrate settings */
 181         serial_init,            /* serial communications setup */
 182         display_banner,
 183         display_dram_config,
 184
 185         NULL,
 186 };
 187
 188 gd_t *gd;
 189
 190 void start_i386boot (void)
 191 {
 192         char *s;
 193         int i;
 194         ulong size;
 195         static gd_t gd_data;
 196         static bd_t bd_data;
 197         init_fnc_t **init_fnc_ptr;
 198
 199 #ifndef CONFIG_SKIP_RELOCATE_UBOOT
 200         cmd_tbl_t *p;
 201 #endif
 202         show_boot_progress(0x21);
 203
 204         gd = &gd_data;
 205         /* compiler optimization barrier needed for GCC >= 3.4 */
 206         __asm__ __volatile__("": : :"memory");
 207
 208         memset (gd, 0, sizeof (gd_t));
 209         gd->bd = &bd_data;
 210         memset (gd->bd, 0, sizeof (bd_t));
 211         show_boot_progress(0x22);
 212
 213         gd->baudrate =  CONFIG_BAUDRATE;
 214
 215 #ifndef CONFIG_SKIP_RELOCATE_UBOOT
 216         /* Need to set relocation offset here for interrupt initialization */
 217         gd->reloc_off =  CONFIG_SYS_BL_START_RAM - TEXT_BASE;
 218 #endif
 219         for (init_fnc_ptr = init_sequence, i=0; *init_fnc_ptr; ++init_fnc_ptr, i++) {
 220                 show_boot_progress(0xa130|i);
 221
 222                 if ((*init_fnc_ptr)() != 0) {
 223                         hang ();
 224                 }
 225         }
 226         show_boot_progress(0x23);
 227
 228 #ifndef CONFIG_SKIP_RELOCATE_UBOOT
 229         for (p = &__u_boot_cmd_start; p != &__u_boot_cmd_end; p++) {
 230                 ulong addr;
 231                 addr = (ulong) (p->cmd) + gd->reloc_off;
 232                 p->cmd = (int (*)(struct cmd_tbl_s *, int, int, char *[]))addr;
 233                 addr = (ulong)(p->name) + gd->reloc_off;
 234                 p->name = (char *)addr;
 235
 236                 if (p->usage != NULL) {
 237                         addr = (ulong)(p->usage) + gd->reloc_off;
 238                         p->usage = (char *)addr;
 239                 }
 240         #ifdef  CONFIG_SYS_LONGHELP
 241                 if (p->help != NULL) {
 242                         addr = (ulong)(p->help) + gd->reloc_off;
 243                         p->help = (char *)addr;
 244                 }
 245         #endif
 246         }
 247 #endif
 248         /* configure available FLASH banks */
 249         size = flash_init();
 250         display_flash_config(size);
 251         show_boot_progress(0x24);
 252
 253         show_boot_progress(0x25);
 254
 255         /* initialize environment */
 256         env_relocate ();
 257         show_boot_progress(0x26);
 258
 259
 260         /* IP Address */
 261         bd_data.bi_ip_addr = getenv_IPaddr ("ipaddr");
 262
 263 #if defined(CONFIG_PCI)
 264         /*
 265          * Do pci configuration
 266          */
 267         pci_init();
 268 #endif
 269
 270         show_boot_progress(0x27);
 271
 272
 273         stdio_init ();
 274
 275         jumptable_init ();
 276
 277         /* Initialize the console (after the relocation and devices init) */
 278         console_init_r();
 279
 280 #ifdef CONFIG_MISC_INIT_R
 281         /* miscellaneous platform dependent initialisations */
 282         misc_init_r();
 283 #endif
 284
 285 #if defined(CONFIG_CMD_PCMCIA) && !defined(CONFIG_CMD_IDE)
 286         WATCHDOG_RESET();
 287         puts ("PCMCIA:");
 288         pcmcia_init();
 289 #endif
 290
 291 #if defined(CONFIG_CMD_KGDB)
 292         WATCHDOG_RESET();
 293         puts("KGDB:  ");
 294         kgdb_init();
 295 #endif
 296
 297         /* enable exceptions */
 298         enable_interrupts();
 299         show_boot_progress(0x28);
 300
 301         /* Must happen after interrupts are initialized since
 302          * an irq handler gets installed
 303          */
 304 #ifdef CONFIG_SERIAL_SOFTWARE_FIFO
 305         serial_buffered_init();
 306 #endif
 307
 308 #ifdef CONFIG_STATUS_LED
 309         status_led_set (STATUS_LED_BOOT, STATUS_LED_BLINKING);
 310 #endif
 311
 312         udelay(20);
 313
 314         set_timer (0);
 315
 316         /* Initialize from environment */
 317         if ((s = getenv ("loadaddr")) != NULL) {
 318                 load_addr = simple_strtoul (s, NULL, 16);
 319         }
 320 #if defined(CONFIG_CMD_NET)
 321         if ((s = getenv ("bootfile")) != NULL) {
 322                 copy_filename (BootFile, s, sizeof (BootFile));
 323         }
 324 #endif
 325
 326         WATCHDOG_RESET();
 327
 328 #if defined(CONFIG_CMD_IDE)
 329         WATCHDOG_RESET();
 330         puts("IDE:   ");
 331         ide_init();
 332 #endif
 333
 334 #if defined(CONFIG_CMD_SCSI)
 335         WATCHDOG_RESET();
 336         puts("SCSI:  ");
 337         scsi_init();
 338 #endif
 339
 340 #if defined(CONFIG_CMD_DOC)
 341         WATCHDOG_RESET();
 342         puts("DOC:   ");
 343         doc_init();
 344 #endif
 345
 346 #ifdef CONFIG_BITBANGMII
 347         bb_miiphy_init();
 348 #endif
 349 #if defined(CONFIG_CMD_NET)
 350 #if defined(CONFIG_NET_MULTI)
 351         WATCHDOG_RESET();
 352         puts("Net:   ");
 353 #endif
 354         eth_initialize(gd->bd);
 355 #endif
 356
 357 #if ( defined(CONFIG_CMD_NET)) && (0)
 358         WATCHDOG_RESET();
 359 # ifdef DEBUG
 360         puts ("Reset Ethernet PHY\n");
 361 # endif
 362         reset_phy();
 363 #endif
 364
 365 #ifdef CONFIG_LAST_STAGE_INIT
 366         WATCHDOG_RESET();
 367         /*
 368          * Some parts can be only initialized if all others (like
 369          * Interrupts) are up and running (i.e. the PC-style ISA
 370          * keyboard).
 371          */
 372         last_stage_init();
 373 #endif
 374
 375
 376 #ifdef CONFIG_POST
 377         post_run (NULL, POST_RAM | post_bootmode_get(0));
 378 #endif
 379
 380
 381         show_boot_progress(0x29);
 382
 383         /* main_loop() can return to retry autoboot, if so just run it again. */
 384         for (;;) {
 385                 main_loop();
 386         }
 387
 388         /* NOTREACHED - no way out of command loop except booting */
 389 }
 390
 391 void hang (void)
 392 {
 393         puts ("### ERROR ### Please RESET the board ###\n");
 394         for (;;);
 395 }
 396
 397 unsigned long do_go_exec (ulong (*entry)(int, char *[]), int argc, char *argv[])
 398 {
 399         /*
 400          * TODO: Test this function - changed to fix compiler error.
 401          * Original code was:
 402          *   return (entry >> 1) (argc, argv);
 403          * with a comment about Nios function pointers are address >> 1
 404          */
 405         return (entry) (argc, argv);
 406 }