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 extern long _i386boot_realmode;
  57 extern long _i386boot_realmode_size;
  58 extern long _i386boot_bios;
  59 extern long _i386boot_bios_size;
  60
  61 /* The symbols defined by the linker script becomes pointers
  62  * which is somewhat inconveient ... */
  63 ulong i386boot_start         = (ulong)&_i386boot_start;         /* code start (in flash) defined in start.S */
  64 ulong i386boot_end           = (ulong)&_i386boot_end;           /* code end (in flash) */
  65 ulong i386boot_romdata_start = (ulong)&_i386boot_romdata_start; /* datasegment in flash (also code+rodata end) */
  66 ulong i386boot_romdata_dest  = (ulong)&_i386boot_romdata_dest;  /* data location segment in ram */
  67 ulong i386boot_romdata_size  = (ulong)&_i386boot_romdata_size;  /* size of data segment */
  68 ulong i386boot_bss_start     = (ulong)&_i386boot_bss_start;     /* bss start */
  69 ulong i386boot_bss_size      = (ulong)&_i386boot_bss_size;      /* bss size */
  70
  71 ulong i386boot_realmode      = (ulong)&_i386boot_realmode;      /* start of realmode entry code */
  72 ulong i386boot_realmode_size = (ulong)&_i386boot_realmode_size; /* size of realmode entry code */
  73 ulong i386boot_bios          = (ulong)&_i386boot_bios;          /* start of BIOS emulation code */
  74 ulong i386boot_bios_size     = (ulong)&_i386boot_bios_size;     /* size of BIOS emulation code */
  75
  76
  77 const char version_string[] =
  78         U_BOOT_VERSION" (" U_BOOT_DATE " - " U_BOOT_TIME ")";
  79
  80 static int mem_malloc_init(void)
  81 {
  82         /* start malloc area right after the stack */
  83         mem_malloc_start = i386boot_bss_start +
  84                 i386boot_bss_size + CONFIG_SYS_STACK_SIZE;
  85         mem_malloc_start = (mem_malloc_start+3)&~3;
  86
  87         /* Use all available RAM for malloc() */
  88         mem_malloc_end = gd->ram_size;
  89
  90         mem_malloc_brk = mem_malloc_start;
  91
  92         return 0;
  93 }
  94
  95 /************************************************************************
  96  * Init Utilities                                                       *
  97  ************************************************************************
  98  * Some of this code should be moved into the core functions,
  99  * or dropped completely,
 100  * but let's get it working (again) first...
 101  */
 102 static int init_baudrate (void)
 103 {
 104         char tmp[64];   /* long enough for environment variables */
 105         int i = getenv_r("baudrate", tmp, 64);
 106
 107         gd->baudrate = (i != 0)
 108                         ? (int) simple_strtoul (tmp, NULL, 10)
 109                         : CONFIG_BAUDRATE;
 110
 111         return (0);
 112 }
 113
 114 static int display_banner (void)
 115 {
 116
 117         printf ("\n\n%s\n\n", version_string);
 118         printf ("U-Boot code: %08lX -> %08lX  data: %08lX -> %08lX\n"
 119                 "        BSS: %08lX -> %08lX stack: %08lX -> %08lX\n",
 120                 i386boot_start, i386boot_romdata_start-1,
 121                 i386boot_romdata_dest, i386boot_romdata_dest+i386boot_romdata_size-1,
 122                 i386boot_bss_start, i386boot_bss_start+i386boot_bss_size-1,
 123                 i386boot_bss_start+i386boot_bss_size,
 124                 i386boot_bss_start+i386boot_bss_size+CONFIG_SYS_STACK_SIZE-1);
 125
 126
 127         return (0);
 128 }
 129
 130 /*
 131  * WARNING: this code looks "cleaner" than the PowerPC version, but
 132  * has the disadvantage that you either get nothing, or everything.
 133  * On PowerPC, you might see "DRAM: " before the system hangs - which
 134  * gives a simple yet clear indication which part of the
 135  * initialization if failing.
 136  */
 137 static int display_dram_config (void)
 138 {
 139         int i;
 140
 141         puts ("DRAM Configuration:\n");
 142
 143         for (i=0; i<CONFIG_NR_DRAM_BANKS; i++) {
 144                 printf ("Bank #%d: %08lx ", i, gd->bd->bi_dram[i].start);
 145                 print_size (gd->bd->bi_dram[i].size, "\n");
 146         }
 147
 148         return (0);
 149 }
 150
 151 static void display_flash_config (ulong size)
 152 {
 153         puts ("Flash: ");
 154         print_size (size, "\n");
 155 }
 156
 157
 158 /*
 159  * Breath some life into the board...
 160  *
 161  * Initialize an SMC for serial comms, and carry out some hardware
 162  * tests.
 163  *
 164  * The first part of initialization is running from Flash memory;
 165  * its main purpose is to initialize the RAM so that we
 166  * can relocate the monitor code to RAM.
 167  */
 168
 169 /*
 170  * All attempts to come up with a "common" initialization sequence
 171  * that works for all boards and architectures failed: some of the
 172  * requirements are just _too_ different. To get rid of the resulting
 173  * mess of board dependend #ifdef'ed code we now make the whole
 174  * initialization sequence configurable to the user.
 175  *
 176  * The requirements for any new initalization function is simple: it
 177  * receives a pointer to the "global data" structure as it's only
 178  * argument, and returns an integer return code, where 0 means
 179  * "continue" and != 0 means "fatal error, hang the system".
 180  */
 181 typedef int (init_fnc_t) (void);
 182
 183 init_fnc_t *init_sequence[] = {
 184         cpu_init,               /* basic cpu dependent setup */
 185         board_init,             /* basic board dependent setup */
 186         dram_init,              /* configure available RAM banks */
 187         mem_malloc_init,        /* dependant on dram_init */
 188         interrupt_init,         /* set up exceptions */
 189         timer_init,
 190         serial_init,
 191         env_init,               /* initialize environment */
 192         init_baudrate,          /* initialze baudrate settings */
 193         serial_init,            /* serial communications setup */
 194         display_banner,
 195         display_dram_config,
 196
 197         NULL,
 198 };
 199
 200 gd_t *gd;
 201
 202 void start_i386boot (void)
 203 {
 204         char *s;
 205         int i;
 206         ulong size;
 207         static gd_t gd_data;
 208         static bd_t bd_data;
 209         init_fnc_t **init_fnc_ptr;
 210
 211 #ifndef CONFIG_SKIP_RELOCATE_UBOOT
 212         cmd_tbl_t *p;
 213 #endif
 214         show_boot_progress(0x21);
 215
 216         gd = &gd_data;
 217         /* compiler optimization barrier needed for GCC >= 3.4 */
 218         __asm__ __volatile__("": : :"memory");
 219
 220         memset (gd, 0, sizeof (gd_t));
 221         gd->bd = &bd_data;
 222         memset (gd->bd, 0, sizeof (bd_t));
 223         show_boot_progress(0x22);
 224
 225         gd->baudrate =  CONFIG_BAUDRATE;
 226
 227 #ifndef CONFIG_SKIP_RELOCATE_UBOOT
 228         /* Need to set relocation offset here for interrupt initialization */
 229         gd->reloc_off =  CONFIG_SYS_BL_START_RAM - TEXT_BASE;
 230 #endif
 231         for (init_fnc_ptr = init_sequence, i=0; *init_fnc_ptr; ++init_fnc_ptr, i++) {
 232                 show_boot_progress(0xa130|i);
 233
 234                 if ((*init_fnc_ptr)() != 0) {
 235                         hang ();
 236                 }
 237         }
 238         show_boot_progress(0x23);
 239
 240 #ifndef CONFIG_SKIP_RELOCATE_UBOOT
 241         for (p = &__u_boot_cmd_start; p != &__u_boot_cmd_end; p++) {
 242                 ulong addr;
 243                 addr = (ulong) (p->cmd) + gd->reloc_off;
 244                 p->cmd = (int (*)(struct cmd_tbl_s *, int, int, char *[]))addr;
 245                 addr = (ulong)(p->name) + gd->reloc_off;
 246                 p->name = (char *)addr;
 247
 248                 if (p->usage != NULL) {
 249                         addr = (ulong)(p->usage) + gd->reloc_off;
 250                         p->usage = (char *)addr;
 251                 }
 252         #ifdef  CONFIG_SYS_LONGHELP
 253                 if (p->help != NULL) {
 254                         addr = (ulong)(p->help) + gd->reloc_off;
 255                         p->help = (char *)addr;
 256                 }
 257         #endif
 258         }
 259 #endif
 260         /* configure available FLASH banks */
 261         size = flash_init();
 262         display_flash_config(size);
 263         show_boot_progress(0x24);
 264
 265         show_boot_progress(0x25);
 266
 267         /* initialize environment */
 268         env_relocate ();
 269         show_boot_progress(0x26);
 270
 271
 272         /* IP Address */
 273         bd_data.bi_ip_addr = getenv_IPaddr ("ipaddr");
 274
 275 #if defined(CONFIG_PCI)
 276         /*
 277          * Do pci configuration
 278          */
 279         pci_init();
 280 #endif
 281
 282         show_boot_progress(0x27);
 283
 284
 285         stdio_init ();
 286
 287         jumptable_init ();
 288
 289         /* Initialize the console (after the relocation and devices init) */
 290         console_init_r();
 291
 292 #ifdef CONFIG_MISC_INIT_R
 293         /* miscellaneous platform dependent initialisations */
 294         misc_init_r();
 295 #endif
 296
 297 #if defined(CONFIG_CMD_PCMCIA) && !defined(CONFIG_CMD_IDE)
 298         WATCHDOG_RESET();
 299         puts ("PCMCIA:");
 300         pcmcia_init();
 301 #endif
 302
 303 #if defined(CONFIG_CMD_KGDB)
 304         WATCHDOG_RESET();
 305         puts("KGDB:  ");
 306         kgdb_init();
 307 #endif
 308
 309         /* enable exceptions */
 310         enable_interrupts();
 311         show_boot_progress(0x28);
 312
 313         /* Must happen after interrupts are initialized since
 314          * an irq handler gets installed
 315          */
 316 #ifdef CONFIG_SERIAL_SOFTWARE_FIFO
 317         serial_buffered_init();
 318 #endif
 319
 320 #ifdef CONFIG_STATUS_LED
 321         status_led_set (STATUS_LED_BOOT, STATUS_LED_BLINKING);
 322 #endif
 323
 324         udelay(20);
 325
 326         set_timer (0);
 327
 328         /* Initialize from environment */
 329         if ((s = getenv ("loadaddr")) != NULL) {
 330                 load_addr = simple_strtoul (s, NULL, 16);
 331         }
 332 #if defined(CONFIG_CMD_NET)
 333         if ((s = getenv ("bootfile")) != NULL) {
 334                 copy_filename (BootFile, s, sizeof (BootFile));
 335         }
 336 #endif
 337
 338         WATCHDOG_RESET();
 339
 340 #if defined(CONFIG_CMD_IDE)
 341         WATCHDOG_RESET();
 342         puts("IDE:   ");
 343         ide_init();
 344 #endif
 345
 346 #if defined(CONFIG_CMD_SCSI)
 347         WATCHDOG_RESET();
 348         puts("SCSI:  ");
 349         scsi_init();
 350 #endif
 351
 352 #if defined(CONFIG_CMD_DOC)
 353         WATCHDOG_RESET();
 354         puts("DOC:   ");
 355         doc_init();
 356 #endif
 357
 358 #ifdef CONFIG_BITBANGMII
 359         bb_miiphy_init();
 360 #endif
 361 #if defined(CONFIG_CMD_NET)
 362 #if defined(CONFIG_NET_MULTI)
 363         WATCHDOG_RESET();
 364         puts("Net:   ");
 365 #endif
 366         eth_initialize(gd->bd);
 367 #endif
 368
 369 #if ( defined(CONFIG_CMD_NET)) && (0)
 370         WATCHDOG_RESET();
 371 # ifdef DEBUG
 372         puts ("Reset Ethernet PHY\n");
 373 # endif
 374         reset_phy();
 375 #endif
 376
 377 #ifdef CONFIG_LAST_STAGE_INIT
 378         WATCHDOG_RESET();
 379         /*
 380          * Some parts can be only initialized if all others (like
 381          * Interrupts) are up and running (i.e. the PC-style ISA
 382          * keyboard).
 383          */
 384         last_stage_init();
 385 #endif
 386
 387
 388 #ifdef CONFIG_POST
 389         post_run (NULL, POST_RAM | post_bootmode_get(0));
 390 #endif
 391
 392
 393         show_boot_progress(0x29);
 394
 395         /* main_loop() can return to retry autoboot, if so just run it again. */
 396         for (;;) {
 397                 main_loop();
 398         }
 399
 400         /* NOTREACHED - no way out of command loop except booting */
 401 }
 402
 403 void hang (void)
 404 {
 405         puts ("### ERROR ### Please RESET the board ###\n");
 406         for (;;);
 407 }
 408
 409 unsigned long do_go_exec (ulong (*entry)(int, char *[]), int argc, char *argv[])
 410 {
 411         /*
 412          * TODO: Test this function - changed to fix compiler error.
 413          * Original code was:
 414          *   return (entry >> 1) (argc, argv);
 415          * with a comment about Nios function pointers are address >> 1
 416          */
 417         return (entry) (argc, argv);
 418 }