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 <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 DECLARE_GLOBAL_DATA_PTR;
  43
  44 extern long _i386boot_start;
  45 extern long _i386boot_end;
  46 extern long _i386boot_romdata_start;
  47 extern long _i386boot_romdata_dest;
  48 extern long _i386boot_romdata_size;
  49 extern long _i386boot_bss_start;
  50 extern long _i386boot_bss_size;
  51
  52 extern long _i386boot_realmode;
  53 extern long _i386boot_realmode_size;
  54 extern long _i386boot_bios;
  55 extern long _i386boot_bios_size;
  56
  57 /* The symbols defined by the linker script becomes pointers
  58  * which is somewhat inconveient ... */
  59 ulong i386boot_start         = (ulong)&_i386boot_start;         /* code start (in flash) defined in start.S */
  60 ulong i386boot_end           = (ulong)&_i386boot_end;           /* code end (in flash) */
  61 ulong i386boot_romdata_start = (ulong)&_i386boot_romdata_start; /* datasegment in flash (also code+rodata end) */
  62 ulong i386boot_romdata_dest  = (ulong)&_i386boot_romdata_dest;  /* data location segment in ram */
  63 ulong i386boot_romdata_size  = (ulong)&_i386boot_romdata_size;  /* size of data segment */
  64 ulong i386boot_bss_start     = (ulong)&_i386boot_bss_start;     /* bss start */
  65 ulong i386boot_bss_size      = (ulong)&_i386boot_bss_size;      /* bss size */
  66
  67 ulong i386boot_realmode      = (ulong)&_i386boot_realmode;      /* start of realmode entry code */
  68 ulong i386boot_realmode_size = (ulong)&_i386boot_realmode_size; /* size of realmode entry code */
  69 ulong i386boot_bios          = (ulong)&_i386boot_bios;          /* start of BIOS emulation code */
  70 ulong i386boot_bios_size     = (ulong)&_i386boot_bios_size;     /* size of BIOS emulation code */
  71
  72
  73 const char version_string[] =
  74         U_BOOT_VERSION" (" U_BOOT_DATE " - " U_BOOT_TIME ")";
  75
  76
  77 /*
  78  * Begin and End of memory area for malloc(), and current "brk"
  79  */
  80 static ulong mem_malloc_start = 0;
  81 static ulong mem_malloc_end = 0;
  82 static ulong mem_malloc_brk = 0;
  83
  84 static int mem_malloc_init(void)
  85 {
  86         /* start malloc area right after the stack */
  87         mem_malloc_start = i386boot_bss_start +
  88                 i386boot_bss_size + CONFIG_SYS_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 /************************************************************************
 113  * Init Utilities                                                       *
 114  ************************************************************************
 115  * Some of this code should be moved into the core functions,
 116  * or dropped completely,
 117  * but let's get it working (again) first...
 118  */
 119 static int init_baudrate (void)
 120 {
 121         char tmp[64];   /* long enough for environment variables */
 122         int i = getenv_r("baudrate", tmp, 64);
 123
 124         gd->baudrate = (i != 0)
 125                         ? (int) simple_strtoul (tmp, NULL, 10)
 126                         : CONFIG_BAUDRATE;
 127
 128         return (0);
 129 }
 130
 131 static int display_banner (void)
 132 {
 133
 134         printf ("\n\n%s\n\n", version_string);
 135         printf ("U-Boot code: %08lX -> %08lX  data: %08lX -> %08lX\n"
 136                 "        BSS: %08lX -> %08lX stack: %08lX -> %08lX\n",
 137                 i386boot_start, i386boot_romdata_start-1,
 138                 i386boot_romdata_dest, i386boot_romdata_dest+i386boot_romdata_size-1,
 139                 i386boot_bss_start, i386boot_bss_start+i386boot_bss_size-1,
 140                 i386boot_bss_start+i386boot_bss_size,
 141                 i386boot_bss_start+i386boot_bss_size+CONFIG_SYS_STACK_SIZE-1);
 142
 143
 144         return (0);
 145 }
 146
 147 /*
 148  * WARNING: this code looks "cleaner" than the PowerPC version, but
 149  * has the disadvantage that you either get nothing, or everything.
 150  * On PowerPC, you might see "DRAM: " before the system hangs - which
 151  * gives a simple yet clear indication which part of the
 152  * initialization if failing.
 153  */
 154 static int display_dram_config (void)
 155 {
 156         int i;
 157
 158         puts ("DRAM Configuration:\n");
 159
 160         for (i=0; i<CONFIG_NR_DRAM_BANKS; i++) {
 161                 printf ("Bank #%d: %08lx ", i, gd->bd->bi_dram[i].start);
 162                 print_size (gd->bd->bi_dram[i].size, "\n");
 163         }
 164
 165         return (0);
 166 }
 167
 168 static void display_flash_config (ulong size)
 169 {
 170         puts ("Flash: ");
 171         print_size (size, "\n");
 172 }
 173
 174
 175 /*
 176  * Breath some life into the board...
 177  *
 178  * Initialize an SMC for serial comms, and carry out some hardware
 179  * tests.
 180  *
 181  * The first part of initialization is running from Flash memory;
 182  * its main purpose is to initialize the RAM so that we
 183  * can relocate the monitor code to RAM.
 184  */
 185
 186 /*
 187  * All attempts to come up with a "common" initialization sequence
 188  * that works for all boards and architectures failed: some of the
 189  * requirements are just _too_ different. To get rid of the resulting
 190  * mess of board dependend #ifdef'ed code we now make the whole
 191  * initialization sequence configurable to the user.
 192  *
 193  * The requirements for any new initalization function is simple: it
 194  * receives a pointer to the "global data" structure as it's only
 195  * argument, and returns an integer return code, where 0 means
 196  * "continue" and != 0 means "fatal error, hang the system".
 197  */
 198 typedef int (init_fnc_t) (void);
 199
 200 init_fnc_t *init_sequence[] = {
 201         cpu_init,               /* basic cpu dependent setup */
 202         board_init,             /* basic board dependent setup */
 203         dram_init,              /* configure available RAM banks */
 204         mem_malloc_init,        /* dependant on dram_init */
 205         interrupt_init,         /* set up exceptions */
 206         timer_init,
 207         serial_init,
 208         env_init,               /* initialize environment */
 209         init_baudrate,          /* initialze baudrate settings */
 210         serial_init,            /* serial communications setup */
 211         display_banner,
 212         display_dram_config,
 213
 214         NULL,
 215 };
 216
 217 gd_t *gd;
 218
 219 void start_i386boot (void)
 220 {
 221         char *s;
 222         int i;
 223         ulong size;
 224         static gd_t gd_data;
 225         static bd_t bd_data;
 226         init_fnc_t **init_fnc_ptr;
 227
 228         show_boot_progress(0x21);
 229
 230         gd = &gd_data;
 231         /* compiler optimization barrier needed for GCC >= 3.4 */
 232         __asm__ __volatile__("": : :"memory");
 233
 234         memset (gd, 0, sizeof (gd_t));
 235         gd->bd = &bd_data;
 236         memset (gd->bd, 0, sizeof (bd_t));
 237         show_boot_progress(0x22);
 238
 239         gd->baudrate =  CONFIG_BAUDRATE;
 240
 241         for (init_fnc_ptr = init_sequence, i=0; *init_fnc_ptr; ++init_fnc_ptr, i++) {
 242                 show_boot_progress(0xa130|i);
 243
 244                 if ((*init_fnc_ptr)() != 0) {
 245                         hang ();
 246                 }
 247         }
 248         show_boot_progress(0x23);
 249
 250         /* configure available FLASH banks */
 251         size = flash_init();
 252         display_flash_config(size);
 253         show_boot_progress(0x24);
 254
 255         show_boot_progress(0x25);
 256
 257         /* initialize environment */
 258         env_relocate ();
 259         show_boot_progress(0x26);
 260
 261
 262         /* IP Address */
 263         bd_data.bi_ip_addr = getenv_IPaddr ("ipaddr");
 264
 265 #if defined(CONFIG_PCI)
 266         /*
 267          * Do pci configuration
 268          */
 269         pci_init();
 270 #endif
 271
 272         show_boot_progress(0x27);
 273
 274
 275         devices_init ();
 276
 277         jumptable_init ();
 278
 279         /* Initialize the console (after the relocation and devices init) */
 280         console_init_r();
 281
 282 #ifdef CONFIG_MISC_INIT_R
 283         /* miscellaneous platform dependent initialisations */
 284         misc_init_r();
 285 #endif
 286
 287 #if defined(CONFIG_CMD_PCMCIA) && !defined(CONFIG_CMD_IDE)
 288         WATCHDOG_RESET();
 289         puts ("PCMCIA:");
 290         pcmcia_init();
 291 #endif
 292
 293 #if defined(CONFIG_CMD_KGDB)
 294         WATCHDOG_RESET();
 295         puts("KGDB:  ");
 296         kgdb_init();
 297 #endif
 298
 299         /* enable exceptions */
 300         enable_interrupts();
 301         show_boot_progress(0x28);
 302
 303         /* Must happen after interrupts are initialized since
 304          * an irq handler gets installed
 305          */
 306 #ifdef CONFIG_SERIAL_SOFTWARE_FIFO
 307         serial_buffered_init();
 308 #endif
 309
 310 #ifdef CONFIG_STATUS_LED
 311         status_led_set (STATUS_LED_BOOT, STATUS_LED_BLINKING);
 312 #endif
 313
 314         udelay(20);
 315
 316         set_timer (0);
 317
 318         /* Initialize from environment */
 319         if ((s = getenv ("loadaddr")) != NULL) {
 320                 load_addr = simple_strtoul (s, NULL, 16);
 321         }
 322 #if defined(CONFIG_CMD_NET)
 323         if ((s = getenv ("bootfile")) != NULL) {
 324                 copy_filename (BootFile, s, sizeof (BootFile));
 325         }
 326 #endif
 327
 328         WATCHDOG_RESET();
 329
 330 #if defined(CONFIG_CMD_IDE)
 331         WATCHDOG_RESET();
 332         puts("IDE:   ");
 333         ide_init();
 334 #endif
 335
 336 #if defined(CONFIG_CMD_SCSI)
 337         WATCHDOG_RESET();
 338         puts("SCSI:  ");
 339         scsi_init();
 340 #endif
 341
 342 #if defined(CONFIG_CMD_DOC)
 343         WATCHDOG_RESET();
 344         puts("DOC:   ");
 345         doc_init();
 346 #endif
 347
 348 #if defined(CONFIG_CMD_NET)
 349 #if defined(CONFIG_NET_MULTI)
 350         WATCHDOG_RESET();
 351         puts("Net:   ");
 352 #endif
 353         eth_initialize(gd->bd);
 354 #endif
 355
 356 #if ( defined(CONFIG_CMD_NET)) && (0)
 357         WATCHDOG_RESET();
 358 # ifdef DEBUG
 359         puts ("Reset Ethernet PHY\n");
 360 # endif
 361         reset_phy();
 362 #endif
 363
 364 #ifdef CONFIG_LAST_STAGE_INIT
 365         WATCHDOG_RESET();
 366         /*
 367          * Some parts can be only initialized if all others (like
 368          * Interrupts) are up and running (i.e. the PC-style ISA
 369          * keyboard).
 370          */
 371         last_stage_init();
 372 #endif
 373
 374
 375 #ifdef CONFIG_POST
 376         post_run (NULL, POST_RAM | post_bootmode_get(0));
 377 #endif
 378
 379
 380         show_boot_progress(0x29);
 381
 382         /* main_loop() can return to retry autoboot, if so just run it again. */
 383         for (;;) {
 384                 main_loop();
 385         }
 386
 387         /* NOTREACHED - no way out of command loop except booting */
 388 }
 389
 390 void hang (void)
 391 {
 392         puts ("### ERROR ### Please RESET the board ###\n");
 393         for (;;);
 394 }
 395
 396 unsigned long do_go_exec (ulong (*entry)(int, char *[]), int argc, char *argv[])
 397 {
 398         /*
 399          * TODO: Test this function - changed to fix compiler error.
 400          * Original code was:
 401          *   return (entry >> 1) (argc, argv);
 402          * with a comment about Nios function pointers are address >> 1
 403          */
 404         return (entry) (argc, argv);
 405 }