lib_mips/board.c

   1 /*
   2  * (C) Copyright 2003
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  */
  23
  24 #include <common.h>
  25 #include <command.h>
  26 #include <malloc.h>
  27 #include <devices.h>
  28 #include <version.h>
  29 #include <net.h>
  30 #include <environment.h>
  31
  32 DECLARE_GLOBAL_DATA_PTR;
  33
  34 #if ( ((CFG_ENV_ADDR+CFG_ENV_SIZE) < CFG_MONITOR_BASE) || \
  35       (CFG_ENV_ADDR >= (CFG_MONITOR_BASE + CFG_MONITOR_LEN)) ) || \
  36     defined(CFG_ENV_IS_IN_NVRAM)
  37 #define TOTAL_MALLOC_LEN        (CFG_MALLOC_LEN + CFG_ENV_SIZE)
  38 #else
  39 #define TOTAL_MALLOC_LEN        CFG_MALLOC_LEN
  40 #endif
  41
  42 #undef DEBUG
  43
  44 #if (CONFIG_COMMANDS & CFG_CMD_NAND)
  45 extern void nand_init (void);
  46 #endif
  47
  48 #if defined(CONFIG_JZSOC)
  49 extern int jz_board_init(void);
  50 #endif
  51
  52 extern int timer_init(void);
  53
  54 extern int incaip_set_cpuclk(void);
  55
  56 extern ulong uboot_end_data;
  57 extern ulong uboot_end;
  58
  59 ulong monitor_flash_len;
  60
  61 const char version_string[] =
  62         U_BOOT_VERSION" (" __DATE__ " - " __TIME__ ")";
  63
  64 static char *failed = "*** failed ***\n";
  65
  66 /*
  67  * Begin and End of memory area for malloc(), and current "brk"
  68  */
  69 static ulong mem_malloc_start;
  70 static ulong mem_malloc_end;
  71 static ulong mem_malloc_brk;
  72
  73
  74 /*
  75  * The Malloc area is immediately below the monitor copy in DRAM
  76  */
  77 static void mem_malloc_init (void)
  78 {
  79         ulong dest_addr = TEXT_BASE + gd->reloc_off;
  80
  81         mem_malloc_end = dest_addr;
  82         mem_malloc_start = dest_addr - TOTAL_MALLOC_LEN;
  83         mem_malloc_brk = mem_malloc_start;
  84
  85         memset ((void *) mem_malloc_start,
  86                 0,
  87                 mem_malloc_end - mem_malloc_start);
  88 }
  89
  90 void *sbrk (ptrdiff_t increment)
  91 {
  92         ulong old = mem_malloc_brk;
  93         ulong new = old + increment;
  94
  95         if ((new < mem_malloc_start) || (new > mem_malloc_end)) {
  96                 return (NULL);
  97         }
  98         mem_malloc_brk = new;
  99         return ((void *) old);
 100 }
 101
 102
 103 static int init_func_ram (void)
 104 {
 105 #ifdef  CONFIG_BOARD_TYPES
 106         int board_type = gd->board_type;
 107 #else
 108         int board_type = 0;     /* use dummy arg */
 109 #endif
 110         puts ("DRAM:  ");
 111
 112         if ((gd->ram_size = initdram (board_type)) > 0) {
 113                 print_size (gd->ram_size, "\n");
 114                 return (0);
 115         }
 116         puts (failed);
 117         return (1);
 118 }
 119
 120 static int display_banner(void)
 121 {
 122
 123         printf ("\n\n%s\n\n", version_string);
 124         return (0);
 125 }
 126
 127 static void display_flash_config(ulong size)
 128 {
 129         puts ("Flash: ");
 130         print_size (size, "\n");
 131 }
 132
 133
 134 static int init_baudrate (void)
 135 {
 136         char tmp[64];   /* long enough for environment variables */
 137         int i = getenv_r ("baudrate", tmp, sizeof (tmp));
 138
 139         gd->baudrate = (i > 0)
 140                         ? (int) simple_strtoul (tmp, NULL, 10)
 141                         : CONFIG_BAUDRATE;
 142
 143         return (0);
 144 }
 145
 146
 147 /*
 148  * Breath some life into the board...
 149  *
 150  * The first part of initialization is running from Flash memory;
 151  * its main purpose is to initialize the RAM so that we
 152  * can relocate the monitor code to RAM.
 153  */
 154
 155 /*
 156  * All attempts to come up with a "common" initialization sequence
 157  * that works for all boards and architectures failed: some of the
 158  * requirements are just _too_ different. To get rid of the resulting
 159  * mess of board dependend #ifdef'ed code we now make the whole
 160  * initialization sequence configurable to the user.
 161  *
 162  * The requirements for any new initalization function is simple: it
 163  * receives a pointer to the "global data" structure as it's only
 164  * argument, and returns an integer return code, where 0 means
 165  * "continue" and != 0 means "fatal error, hang the system".
 166  */
 167 typedef int (init_fnc_t) (void);
 168
 169 init_fnc_t *init_sequence[] = {
 170 #if defined(CONFIG_JZSOC)
 171         jz_board_init,          /* init gpio/clocks/dram etc. */
 172 #endif
 173         timer_init,
 174         env_init,               /* initialize environment */
 175 #ifdef CONFIG_INCA_IP
 176         incaip_set_cpuclk,      /* set cpu clock according to environment variable */
 177 #endif
 178         init_baudrate,          /* initialze baudrate settings */
 179         serial_init,            /* serial communications setup */
 180         console_init_f,
 181         display_banner,         /* say that we are here */
 182         checkboard,
 183         init_func_ram,
 184         NULL,
 185 };
 186
 187
 188 void board_init_f(ulong bootflag)
 189 {
 190         gd_t gd_data, *id;
 191         bd_t *bd;
 192         init_fnc_t **init_fnc_ptr;
 193         ulong addr, addr_sp, len = (ulong)&uboot_end - TEXT_BASE;
 194         ulong *s;
 195 #ifdef CONFIG_PURPLE
 196         void copy_code (ulong);
 197 #endif
 198
 199         /* Pointer is writable since we allocated a register for it.
 200          */
 201         gd = &gd_data;
 202         /* compiler optimization barrier needed for GCC >= 3.4 */
 203         __asm__ __volatile__("": : :"memory");
 204
 205         memset ((void *)gd, 0, sizeof (gd_t));
 206
 207         for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
 208                 if ((*init_fnc_ptr)() != 0) {
 209                         hang ();
 210                 }
 211         }
 212
 213         /*
 214          * Now that we have DRAM mapped and working, we can
 215          * relocate the code and continue running from DRAM.
 216          */
 217         addr = CFG_SDRAM_BASE + gd->ram_size;
 218
 219         /* We can reserve some RAM "on top" here.
 220          */
 221
 222         /* round down to next 4 kB limit.
 223          */
 224         addr &= ~(4096 - 1);
 225         debug ("Top of RAM usable for U-Boot at: %08lx\n", addr);
 226
 227 #ifdef CONFIG_LCD
 228         /* reserve memory for LCD display (always full pages) */
 229         addr = lcd_setmem (addr);
 230         gd->fb_base = addr;
 231 #endif /* CONFIG_LCD */
 232
 233         /* Reserve memory for U-Boot code, data & bss
 234          * round down to next 16 kB limit
 235          */
 236         addr -= len;
 237         addr &= ~(16 * 1024 - 1);
 238
 239         debug ("Reserving %ldk for U-Boot at: %08lx\n", len >> 10, addr);
 240
 241          /* Reserve memory for malloc() arena.
 242          */
 243         addr_sp = addr - TOTAL_MALLOC_LEN;
 244         debug ("Reserving %dk for malloc() at: %08lx\n",
 245                         TOTAL_MALLOC_LEN >> 10, addr_sp);
 246
 247         /*
 248          * (permanently) allocate a Board Info struct
 249          * and a permanent copy of the "global" data
 250          */
 251         addr_sp -= sizeof(bd_t);
 252         bd = (bd_t *)addr_sp;
 253         gd->bd = bd;
 254         debug ("Reserving %d Bytes for Board Info at: %08lx\n",
 255                         sizeof(bd_t), addr_sp);
 256
 257         addr_sp -= sizeof(gd_t);
 258         id = (gd_t *)addr_sp;
 259         debug ("Reserving %d Bytes for Global Data at: %08lx\n",
 260                         sizeof (gd_t), addr_sp);
 261
 262         /* Reserve memory for boot params.
 263          */
 264         addr_sp -= CFG_BOOTPARAMS_LEN;
 265         bd->bi_boot_params = addr_sp;
 266         debug ("Reserving %dk for boot params() at: %08lx\n",
 267                         CFG_BOOTPARAMS_LEN >> 10, addr_sp);
 268
 269         /*
 270          * Finally, we set up a new (bigger) stack.
 271          *
 272          * Leave some safety gap for SP, force alignment on 16 byte boundary
 273          * Clear initial stack frame
 274          */
 275         addr_sp -= 16;
 276         addr_sp &= ~0xF;
 277         s = (ulong *)addr_sp;
 278         *s-- = 0;
 279         *s-- = 0;
 280         addr_sp = (ulong)s;
 281         debug ("Stack Pointer at: %08lx\n", addr_sp);
 282
 283         /*
 284          * Save local variables to board info struct
 285          */
 286         bd->bi_memstart = CFG_SDRAM_BASE;       /* start of  DRAM memory */
 287         bd->bi_memsize  = gd->ram_size;         /* size  of  DRAM memory in bytes */
 288         bd->bi_baudrate = gd->baudrate;         /* Console Baudrate */
 289
 290         memcpy (id, (void *)gd, sizeof (gd_t));
 291
 292         /* On the purple board we copy the code in a special way
 293          * in order to solve flash problems
 294          */
 295 #ifdef CONFIG_PURPLE
 296         copy_code(addr);
 297 #endif
 298
 299         relocate_code (addr_sp, id, addr);
 300
 301         /* NOTREACHED - relocate_code() does not return */
 302 }
 303 /************************************************************************
 304  *
 305  * This is the next part if the initialization sequence: we are now
 306  * running from RAM and have a "normal" C environment, i. e. global
 307  * data can be written, BSS has been cleared, the stack size in not
 308  * that critical any more, etc.
 309  *
 310  ************************************************************************
 311  */
 312
 313 void board_init_r (gd_t *id, ulong dest_addr)
 314 {
 315         cmd_tbl_t *cmdtp;
 316         ulong size;
 317         extern void malloc_bin_reloc (void);
 318 #ifndef CFG_ENV_IS_NOWHERE
 319         extern char * env_name_spec;
 320 #endif
 321         char *s, *e;
 322         bd_t *bd;
 323         int i;
 324
 325         gd = id;
 326         gd->flags |= GD_FLG_RELOC;      /* tell others: relocation done */
 327
 328         debug ("Now running in RAM - U-Boot at: %08lx\n", dest_addr);
 329
 330         gd->reloc_off = dest_addr - TEXT_BASE;
 331
 332         monitor_flash_len = (ulong)&uboot_end_data - dest_addr;
 333
 334         /*
 335          * We have to relocate the command table manually
 336          */
 337         for (cmdtp = &__u_boot_cmd_start; cmdtp !=  &__u_boot_cmd_end; cmdtp++) {
 338                 ulong addr;
 339
 340                 addr = (ulong) (cmdtp->cmd) + gd->reloc_off;
 341 #if 0
 342                 printf ("Command \"%s\": 0x%08lx => 0x%08lx\n",
 343                                 cmdtp->name, (ulong) (cmdtp->cmd), addr);
 344 #endif
 345                 cmdtp->cmd =
 346                         (int (*)(struct cmd_tbl_s *, int, int, char *[]))addr;
 347
 348                 addr = (ulong)(cmdtp->name) + gd->reloc_off;
 349                 cmdtp->name = (char *)addr;
 350
 351                 if (cmdtp->usage) {
 352                         addr = (ulong)(cmdtp->usage) + gd->reloc_off;
 353                         cmdtp->usage = (char *)addr;
 354                 }
 355 #ifdef  CFG_LONGHELP
 356                 if (cmdtp->help) {
 357                         addr = (ulong)(cmdtp->help) + gd->reloc_off;
 358                         cmdtp->help = (char *)addr;
 359                 }
 360 #endif
 361         }
 362         /* there are some other pointer constants we must deal with */
 363 #ifndef CFG_ENV_IS_NOWHERE
 364         env_name_spec += gd->reloc_off;
 365 #endif
 366
 367         /* configure available FLASH banks */
 368         size = flash_init();
 369         display_flash_config (size);
 370
 371         bd = gd->bd;
 372         bd->bi_flashstart = CFG_FLASH_BASE;
 373         bd->bi_flashsize = size;
 374 #if CFG_MONITOR_BASE == CFG_FLASH_BASE
 375         bd->bi_flashoffset = monitor_flash_len; /* reserved area for U-Boot */
 376 #else
 377         bd->bi_flashoffset = 0;
 378 #endif
 379
 380         /* initialize malloc() area */
 381         mem_malloc_init();
 382         malloc_bin_reloc();
 383
 384 #if (CONFIG_COMMANDS & CFG_CMD_NAND)
 385         puts ("NAND:");
 386         nand_init();            /* go init the NAND */
 387 #endif
 388
 389         /* relocate environment function pointers etc. */
 390         env_relocate();
 391
 392         /* board MAC address */
 393         s = getenv ("ethaddr");
 394         for (i = 0; i < 6; ++i) {
 395                 bd->bi_enetaddr[i] = s ? simple_strtoul (s, &e, 16) : 0;
 396                 if (s)
 397                         s = (*e) ? e + 1 : e;
 398         }
 399
 400         /* IP Address */
 401         bd->bi_ip_addr = getenv_IPaddr("ipaddr");
 402
 403 #if defined(CONFIG_PCI)
 404         /*
 405          * Do pci configuration
 406          */
 407         pci_init();
 408 #endif
 409
 410 /** leave this here (after malloc(), environment and PCI are working) **/
 411         /* Initialize devices */
 412         devices_init ();
 413
 414         jumptable_init ();
 415
 416         /* Initialize the console (after the relocation and devices init) */
 417         console_init_r ();
 418 /** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** **/
 419
 420         /* Initialize from environment */
 421         if ((s = getenv ("loadaddr")) != NULL) {
 422                 load_addr = simple_strtoul (s, NULL, 16);
 423         }
 424 #if (CONFIG_COMMANDS & CFG_CMD_NET)
 425         if ((s = getenv ("bootfile")) != NULL) {
 426                 copy_filename (BootFile, s, sizeof (BootFile));
 427         }
 428 #endif  /* CFG_CMD_NET */
 429
 430 #if defined(CONFIG_MISC_INIT_R)
 431         /* miscellaneous platform dependent initialisations */
 432         misc_init_r ();
 433 #endif
 434
 435 #if (CONFIG_COMMANDS & CFG_CMD_NET)
 436 #if defined(CONFIG_NET_MULTI)
 437         puts ("Net:   ");
 438 #endif
 439         eth_initialize(gd->bd);
 440 #endif
 441
 442         /* main_loop() can return to retry autoboot, if so just run it again. */
 443         for (;;) {
 444                 main_loop ();
 445         }
 446
 447         /* NOTREACHED - no way out of command loop except booting */
 448 }
 449
 450 void hang (void)
 451 {
 452         puts ("### ERROR ### Please RESET the board ###\n");
 453         for (;;);
 454 }