arch/x86/lib/board.c

   1 /*
   2  * (C) Copyright 2008-2011
   3  * Graeme Russ, <graeme.russ@gmail.com>
   4  *
   5  * (C) Copyright 2002
   6  * Daniel Engström, Omicron Ceti AB, <daniel@omicron.se>
   7  *
   8  * (C) Copyright 2002
   9  * Wolfgang Denk, DENX Software Engineering, <wd@denx.de>
  10  *
  11  * (C) Copyright 2002
  12  * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
  13  * Marius Groeger <mgroeger@sysgo.de>
  14  *
  15  * See file CREDITS for list of people who contributed to this
  16  * project.
  17  *
  18  * This program is free software; you can redistribute it and/or
  19  * modify it under the terms of the GNU General Public License as
  20  * published by the Free Software Foundation; either version 2 of
  21  * the License, or (at your option) any later version.
  22  *
  23  * This program is distributed in the hope that it will be useful,
  24  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  25  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  26  * GNU General Public License for more details.
  27  *
  28  * You should have received a copy of the GNU General Public License
  29  * along with this program; if not, write to the Free Software
  30  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  31  * MA 02111-1307 USA
  32  */
  33
  34 #include <common.h>
  35 #include <watchdog.h>
  36 #include <command.h>
  37 #include <stdio_dev.h>
  38 #include <timestamp.h>
  39 #include <version.h>
  40 #include <malloc.h>
  41 #include <net.h>
  42 #include <ide.h>
  43 #include <serial.h>
  44 #include <asm/u-boot-x86.h>
  45 #include <elf.h>
  46
  47 #ifdef CONFIG_BITBANGMII
  48 #include <miiphy.h>
  49 #endif
  50
  51 /*
  52  * Pointer to initial global data area
  53  *
  54  * Here we initialize it.
  55  */
  56 #undef  XTRN_DECLARE_GLOBAL_DATA_PTR
  57 #define XTRN_DECLARE_GLOBAL_DATA_PTR    /* empty = allocate here */
  58 DECLARE_GLOBAL_DATA_PTR = (gd_t *) (CONFIG_SYS_INIT_GD_ADDR);
  59
  60
  61 /* Exports from the Linker Script */
  62 extern ulong __text_start;
  63 extern ulong __data_end;
  64 extern ulong __rel_dyn_start;
  65 extern ulong __rel_dyn_end;
  66 extern ulong __bss_start;
  67 extern ulong __bss_end;
  68
  69 const char version_string[] =
  70         U_BOOT_VERSION" (" U_BOOT_DATE " - " U_BOOT_TIME ")";
  71
  72 /************************************************************************
  73  * Init Utilities                                                       *
  74  ************************************************************************
  75  * Some of this code should be moved into the core functions,
  76  * or dropped completely,
  77  * but let's get it working (again) first...
  78  */
  79 static int init_baudrate (void)
  80 {
  81         char tmp[64];   /* long enough for environment variables */
  82         int i = getenv_f("baudrate", tmp, 64);
  83
  84         gd->baudrate = (i != 0)
  85                         ? (int) simple_strtoul (tmp, NULL, 10)
  86                         : CONFIG_BAUDRATE;
  87
  88         return (0);
  89 }
  90
  91 static int display_banner (void)
  92 {
  93
  94         printf ("\n\n%s\n\n", version_string);
  95 /*
  96         printf ("U-Boot code: %08lX -> %08lX  data: %08lX -> %08lX\n"
  97                 "        BSS: %08lX -> %08lX stack: %08lX -> %08lX\n",
  98                 i386boot_start, i386boot_romdata_start-1,
  99                 i386boot_romdata_dest, i386boot_romdata_dest+i386boot_romdata_size-1,
 100                 i386boot_bss_start, i386boot_bss_start+i386boot_bss_size-1,
 101                 i386boot_bss_start+i386boot_bss_size,
 102                 i386boot_bss_start+i386boot_bss_size+CONFIG_SYS_STACK_SIZE-1);
 103
 104 */
 105
 106         return (0);
 107 }
 108
 109 static int display_dram_config (void)
 110 {
 111         int i;
 112
 113         puts ("DRAM Configuration:\n");
 114
 115         for (i=0; i<CONFIG_NR_DRAM_BANKS; i++) {
 116                 printf ("Bank #%d: %08lx ", i, gd->bd->bi_dram[i].start);
 117                 print_size (gd->bd->bi_dram[i].size, "\n");
 118         }
 119
 120         return (0);
 121 }
 122
 123 static void display_flash_config (ulong size)
 124 {
 125         puts ("Flash: ");
 126         print_size (size, "\n");
 127 }
 128
 129 /*
 130  * Breath some life into the board...
 131  *
 132  * Initialize an SMC for serial comms, and carry out some hardware
 133  * tests.
 134  *
 135  * The first part of initialization is running from Flash memory;
 136  * its main purpose is to initialize the RAM so that we
 137  * can relocate the monitor code to RAM.
 138  */
 139
 140 /*
 141  * All attempts to come up with a "common" initialization sequence
 142  * that works for all boards and architectures failed: some of the
 143  * requirements are just _too_ different. To get rid of the resulting
 144  * mess of board dependend #ifdef'ed code we now make the whole
 145  * initialization sequence configurable to the user.
 146  *
 147  * The requirements for any new initalization function is simple: it
 148  * receives a pointer to the "global data" structure as it's only
 149  * argument, and returns an integer return code, where 0 means
 150  * "continue" and != 0 means "fatal error, hang the system".
 151  */
 152 typedef int (init_fnc_t) (void);
 153
 154 static int calculate_relocation_address(void);
 155 static int copy_uboot_to_ram(void);
 156 static int clear_bss(void);
 157 static int do_elf_reloc_fixups(void);
 158
 159 init_fnc_t *init_sequence_f[] = {
 160         cpu_init_f,
 161         board_early_init_f,
 162         env_init,
 163         init_baudrate,
 164         serial_init,
 165         console_init_f,
 166         dram_init_f,
 167         calculate_relocation_address,
 168         copy_uboot_to_ram,
 169         clear_bss,
 170         do_elf_reloc_fixups,
 171
 172         NULL,
 173 };
 174
 175 init_fnc_t *init_sequence_r[] = {
 176         cpu_init_r,             /* basic cpu dependent setup */
 177         board_early_init_r,     /* basic board dependent setup */
 178         dram_init,              /* configure available RAM banks */
 179         interrupt_init,         /* set up exceptions */
 180         timer_init,
 181         display_banner,
 182         display_dram_config,
 183
 184         NULL,
 185 };
 186
 187 gd_t *gd;
 188
 189 static int calculate_relocation_address(void)
 190 {
 191         void *text_start = &__text_start;
 192         void *bss_end = &__bss_end;
 193         void *dest_addr;
 194         ulong rel_offset;
 195
 196         /* Calculate destination RAM Address and relocation offset */
 197         dest_addr = (void *)gd->ram_size;
 198         dest_addr -= CONFIG_SYS_STACK_SIZE;
 199         dest_addr -= (bss_end - text_start);
 200         rel_offset = dest_addr - text_start;
 201
 202         gd->start_addr_sp = gd->ram_size;
 203         gd->relocaddr = (ulong)dest_addr;
 204         gd->reloc_off = rel_offset;
 205
 206         return 0;
 207 }
 208
 209 static int copy_uboot_to_ram(void)
 210 {
 211         ulong *dst_addr = (ulong *)gd->relocaddr;
 212         ulong *src_addr = (ulong *)&__text_start;
 213         ulong *end_addr = (ulong *)&__data_end;
 214
 215         while (src_addr < end_addr)
 216                 *dst_addr++ = *src_addr++;
 217
 218         return 0;
 219 }
 220
 221 static int clear_bss(void)
 222 {
 223         void *bss_start = &__bss_start;
 224         void *bss_end = &__bss_end;
 225
 226         ulong *dst_addr = (ulong *)(bss_start + gd->reloc_off);
 227         ulong *end_addr = (ulong *)(bss_end + gd->reloc_off);;
 228
 229         while (dst_addr < end_addr)
 230                 *dst_addr++ = 0x00000000;
 231
 232         return 0;
 233 }
 234
 235 static int do_elf_reloc_fixups(void)
 236 {
 237         Elf32_Rel *re_src = (Elf32_Rel *)(&__rel_dyn_start);
 238         Elf32_Rel *re_end = (Elf32_Rel *)(&__rel_dyn_end);
 239
 240         do {
 241                 if (re_src->r_offset >= CONFIG_SYS_TEXT_BASE)
 242                         if (*(Elf32_Addr *)(re_src->r_offset + gd->reloc_off) >= CONFIG_SYS_TEXT_BASE)
 243                                 *(Elf32_Addr *)(re_src->r_offset + gd->reloc_off) += gd->reloc_off;
 244         } while (re_src++ < re_end);
 245
 246         return 0;
 247 }
 248
 249 /* Load U-Boot into RAM, initialize BSS, perform relocation adjustments */
 250 void board_init_f(ulong boot_flags)
 251 {
 252         init_fnc_t **init_fnc_ptr;
 253
 254         gd->flags = boot_flags;
 255
 256         for (init_fnc_ptr = init_sequence_f; *init_fnc_ptr; ++init_fnc_ptr) {
 257                 if ((*init_fnc_ptr)() != 0)
 258                         hang();
 259         }
 260
 261         gd->flags |= GD_FLG_RELOC;
 262
 263         /* Enter the relocated U-Boot! */
 264         relocate_code(gd->start_addr_sp, gd, gd->relocaddr);
 265
 266         /* NOTREACHED - relocate_code() does not return */
 267         while(1);
 268 }
 269
 270 void board_init_r(gd_t *id, ulong dest_addr)
 271 {
 272         char *s;
 273         ulong size;
 274         static bd_t bd_data;
 275         static gd_t gd_data;
 276         init_fnc_t **init_fnc_ptr;
 277
 278         show_boot_progress(0x21);
 279
 280         /* Global data pointer is now writable */
 281         gd = &gd_data;
 282         memcpy(gd, id, sizeof(gd_t));
 283
 284         /* compiler optimization barrier needed for GCC >= 3.4 */
 285         __asm__ __volatile__("": : :"memory");
 286
 287         gd->bd = &bd_data;
 288         memset (gd->bd, 0, sizeof (bd_t));
 289         show_boot_progress(0x22);
 290
 291         gd->baudrate =  CONFIG_BAUDRATE;
 292
 293         mem_malloc_init((((ulong)dest_addr - CONFIG_SYS_MALLOC_LEN)+3)&~3,
 294                         CONFIG_SYS_MALLOC_LEN);
 295
 296         for (init_fnc_ptr = init_sequence_r; *init_fnc_ptr; ++init_fnc_ptr) {
 297                 if ((*init_fnc_ptr)() != 0)
 298                         hang ();
 299         }
 300         show_boot_progress(0x23);
 301
 302 #ifdef CONFIG_SERIAL_MULTI
 303         serial_initialize();
 304 #endif
 305         /* configure available FLASH banks */
 306         size = flash_init();
 307         display_flash_config(size);
 308         show_boot_progress(0x24);
 309
 310         show_boot_progress(0x25);
 311
 312         /* initialize environment */
 313         env_relocate ();
 314         show_boot_progress(0x26);
 315
 316
 317 #ifdef CONFIG_CMD_NET
 318         /* IP Address */
 319         bd_data.bi_ip_addr = getenv_IPaddr ("ipaddr");
 320 #endif
 321
 322 #if defined(CONFIG_PCI)
 323         /*
 324          * Do pci configuration
 325          */
 326         pci_init();
 327 #endif
 328
 329         show_boot_progress(0x27);
 330
 331
 332         stdio_init ();
 333
 334         jumptable_init ();
 335
 336         /* Initialize the console (after the relocation and devices init) */
 337         console_init_r();
 338
 339 #ifdef CONFIG_MISC_INIT_R
 340         /* miscellaneous platform dependent initialisations */
 341         misc_init_r();
 342 #endif
 343
 344 #if defined(CONFIG_CMD_PCMCIA) && !defined(CONFIG_CMD_IDE)
 345         WATCHDOG_RESET();
 346         puts ("PCMCIA:");
 347         pcmcia_init();
 348 #endif
 349
 350 #if defined(CONFIG_CMD_KGDB)
 351         WATCHDOG_RESET();
 352         puts("KGDB:  ");
 353         kgdb_init();
 354 #endif
 355
 356         /* enable exceptions */
 357         enable_interrupts();
 358         show_boot_progress(0x28);
 359
 360 #ifdef CONFIG_STATUS_LED
 361         status_led_set (STATUS_LED_BOOT, STATUS_LED_BLINKING);
 362 #endif
 363
 364         udelay(20);
 365
 366         set_timer (0);
 367
 368         /* Initialize from environment */
 369         if ((s = getenv ("loadaddr")) != NULL) {
 370                 load_addr = simple_strtoul (s, NULL, 16);
 371         }
 372 #if defined(CONFIG_CMD_NET)
 373         if ((s = getenv ("bootfile")) != NULL) {
 374                 copy_filename (BootFile, s, sizeof (BootFile));
 375         }
 376 #endif
 377
 378         WATCHDOG_RESET();
 379
 380 #if defined(CONFIG_CMD_IDE)
 381         WATCHDOG_RESET();
 382         puts("IDE:   ");
 383         ide_init();
 384 #endif
 385
 386 #if defined(CONFIG_CMD_SCSI)
 387         WATCHDOG_RESET();
 388         puts("SCSI:  ");
 389         scsi_init();
 390 #endif
 391
 392 #if defined(CONFIG_CMD_DOC)
 393         WATCHDOG_RESET();
 394         puts("DOC:   ");
 395         doc_init();
 396 #endif
 397
 398 #ifdef CONFIG_BITBANGMII
 399         bb_miiphy_init();
 400 #endif
 401 #if defined(CONFIG_CMD_NET)
 402 #if defined(CONFIG_NET_MULTI)
 403         WATCHDOG_RESET();
 404         puts("Net:   ");
 405 #endif
 406         eth_initialize(gd->bd);
 407 #endif
 408
 409 #if ( defined(CONFIG_CMD_NET)) && (0)
 410         WATCHDOG_RESET();
 411 # ifdef DEBUG
 412         puts ("Reset Ethernet PHY\n");
 413 # endif
 414         reset_phy();
 415 #endif
 416
 417 #ifdef CONFIG_LAST_STAGE_INIT
 418         WATCHDOG_RESET();
 419         /*
 420          * Some parts can be only initialized if all others (like
 421          * Interrupts) are up and running (i.e. the PC-style ISA
 422          * keyboard).
 423          */
 424         last_stage_init();
 425 #endif
 426
 427
 428 #ifdef CONFIG_POST
 429         post_run (NULL, POST_RAM | post_bootmode_get(0));
 430 #endif
 431
 432
 433         show_boot_progress(0x29);
 434
 435         /* main_loop() can return to retry autoboot, if so just run it again. */
 436         for (;;) {
 437                 main_loop();
 438         }
 439
 440         /* NOTREACHED - no way out of command loop except booting */
 441 }
 442
 443 void hang (void)
 444 {
 445         puts ("### ERROR ### Please RESET the board ###\n");
 446         for (;;);
 447 }
 448
 449 unsigned long do_go_exec (ulong (*entry)(int, char * const []), int argc, char * const argv[])
 450 {
 451         unsigned long ret = 0;
 452         char **argv_tmp;
 453
 454         /*
 455          * x86 does not use a dedicated register to pass the pointer to
 456          * the global_data, so it is instead passed as argv[-1]. By using
 457          * argv[-1], the called 'Application' can use the contents of
 458          * argv natively. However, to safely use argv[-1] a new copy of
 459          * argv is needed with the extra element
 460          */
 461         argv_tmp = malloc(sizeof(char *) * (argc + 1));
 462
 463         if (argv_tmp) {
 464                 argv_tmp[0] = (char *)gd;
 465
 466                 memcpy(&argv_tmp[1], argv, (size_t)(sizeof(char *) * argc));
 467
 468                 ret = (entry) (argc, &argv_tmp[1]);
 469                 free(argv_tmp);
 470         }
 471
 472         return ret;
 473 }
 474
 475 void setup_pcat_compatibility(void)
 476         __attribute__((weak, alias("__setup_pcat_compatibility")));
 477
 478 void __setup_pcat_compatibility(void)
 479 {
 480 }