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 #include <nand.h>
  32 #include <spi.h>
  33
  34 DECLARE_GLOBAL_DATA_PTR;
  35
  36 #if ( ((CONFIG_ENV_ADDR+CONFIG_ENV_SIZE) < CONFIG_SYS_MONITOR_BASE) || \
  37       (CONFIG_ENV_ADDR >= (CONFIG_SYS_MONITOR_BASE + CONFIG_SYS_MONITOR_LEN)) ) || \
  38     defined(CONFIG_ENV_IS_IN_NVRAM)
  39 #define TOTAL_MALLOC_LEN        (CONFIG_SYS_MALLOC_LEN + CONFIG_ENV_SIZE)
  40 #else
  41 #define TOTAL_MALLOC_LEN        CONFIG_SYS_MALLOC_LEN
  42 #endif
  43
  44 #undef DEBUG
  45
  46 extern int timer_init(void);
  47
  48 extern int incaip_set_cpuclk(void);
  49
  50 extern ulong uboot_end_data;
  51 extern ulong uboot_end;
  52
  53 ulong monitor_flash_len;
  54
  55 const char version_string[] =
  56         U_BOOT_VERSION" (" __DATE__ " - " __TIME__ ")";
  57
  58 static char *failed = "*** failed ***\n";
  59
  60 /*
  61  * Begin and End of memory area for malloc(), and current "brk"
  62  */
  63 static ulong mem_malloc_start;
  64 static ulong mem_malloc_end;
  65 static ulong mem_malloc_brk;
  66
  67 /*
  68  * mips_io_port_base is the begin of the address space to which x86 style
  69  * I/O ports are mapped.
  70  */
  71 unsigned long mips_io_port_base = -1;
  72
  73 /*
  74  * The Malloc area is immediately below the monitor copy in DRAM
  75  */
  76 static void mem_malloc_init (void)
  77 {
  78         ulong dest_addr = CONFIG_SYS_MONITOR_BASE + gd->reloc_off;
  79
  80         mem_malloc_end = dest_addr;
  81         mem_malloc_start = dest_addr - TOTAL_MALLOC_LEN;
  82         mem_malloc_brk = mem_malloc_start;
  83
  84         memset ((void *) mem_malloc_start,
  85                 0,
  86                 mem_malloc_end - mem_malloc_start);
  87 }
  88
  89 void *sbrk (ptrdiff_t increment)
  90 {
  91         ulong old = mem_malloc_brk;
  92         ulong new = old + increment;
  93
  94         if ((new < mem_malloc_start) || (new > mem_malloc_end)) {
  95                 return (NULL);
  96         }
  97         mem_malloc_brk = new;
  98         return ((void *) old);
  99 }
 100
 101
 102 static int init_func_ram (void)
 103 {
 104 #ifdef  CONFIG_BOARD_TYPES
 105         int board_type = gd->board_type;
 106 #else
 107         int board_type = 0;     /* use dummy arg */
 108 #endif
 109         puts ("DRAM:  ");
 110
 111         if ((gd->ram_size = initdram (board_type)) > 0) {
 112                 print_size (gd->ram_size, "\n");
 113                 return (0);
 114         }
 115         puts (failed);
 116         return (1);
 117 }
 118
 119 static int display_banner(void)
 120 {
 121
 122         printf ("\n\n%s\n\n", version_string);
 123         return (0);
 124 }
 125
 126 #ifndef CONFIG_SYS_NO_FLASH
 127 static void display_flash_config(ulong size)
 128 {
 129         puts ("Flash: ");
 130         print_size (size, "\n");
 131 }
 132 #endif
 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         timer_init,
 171         env_init,               /* initialize environment */
 172 #ifdef CONFIG_INCA_IP
 173         incaip_set_cpuclk,      /* set cpu clock according to environment variable */
 174 #endif
 175         init_baudrate,          /* initialze baudrate settings */
 176         serial_init,            /* serial communications setup */
 177         console_init_f,
 178         display_banner,         /* say that we are here */
 179         checkboard,
 180         init_func_ram,
 181         NULL,
 182 };
 183
 184
 185 void board_init_f(ulong bootflag)
 186 {
 187         gd_t gd_data, *id;
 188         bd_t *bd;
 189         init_fnc_t **init_fnc_ptr;
 190         ulong addr, addr_sp, len = (ulong)&uboot_end - CONFIG_SYS_MONITOR_BASE;
 191         ulong *s;
 192 #ifdef CONFIG_PURPLE
 193         void copy_code (ulong);
 194 #endif
 195
 196         /* Pointer is writable since we allocated a register for it.
 197          */
 198         gd = &gd_data;
 199         /* compiler optimization barrier needed for GCC >= 3.4 */
 200         __asm__ __volatile__("": : :"memory");
 201
 202         memset ((void *)gd, 0, sizeof (gd_t));
 203
 204         for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
 205                 if ((*init_fnc_ptr)() != 0) {
 206                         hang ();
 207                 }
 208         }
 209
 210         /*
 211          * Now that we have DRAM mapped and working, we can
 212          * relocate the code and continue running from DRAM.
 213          */
 214         addr = CONFIG_SYS_SDRAM_BASE + gd->ram_size;
 215
 216         /* We can reserve some RAM "on top" here.
 217          */
 218
 219         /* round down to next 4 kB limit.
 220          */
 221         addr &= ~(4096 - 1);
 222         debug ("Top of RAM usable for U-Boot at: %08lx\n", addr);
 223
 224         /* Reserve memory for U-Boot code, data & bss
 225          * round down to next 16 kB limit
 226          */
 227         addr -= len;
 228         addr &= ~(16 * 1024 - 1);
 229
 230         debug ("Reserving %ldk for U-Boot at: %08lx\n", len >> 10, addr);
 231
 232          /* Reserve memory for malloc() arena.
 233          */
 234         addr_sp = addr - TOTAL_MALLOC_LEN;
 235         debug ("Reserving %dk for malloc() at: %08lx\n",
 236                         TOTAL_MALLOC_LEN >> 10, addr_sp);
 237
 238         /*
 239          * (permanently) allocate a Board Info struct
 240          * and a permanent copy of the "global" data
 241          */
 242         addr_sp -= sizeof(bd_t);
 243         bd = (bd_t *)addr_sp;
 244         gd->bd = bd;
 245         debug ("Reserving %zu Bytes for Board Info at: %08lx\n",
 246                         sizeof(bd_t), addr_sp);
 247
 248         addr_sp -= sizeof(gd_t);
 249         id = (gd_t *)addr_sp;
 250         debug ("Reserving %zu Bytes for Global Data at: %08lx\n",
 251                         sizeof (gd_t), addr_sp);
 252
 253         /* Reserve memory for boot params.
 254          */
 255         addr_sp -= CONFIG_SYS_BOOTPARAMS_LEN;
 256         bd->bi_boot_params = addr_sp;
 257         debug ("Reserving %dk for boot params() at: %08lx\n",
 258                         CONFIG_SYS_BOOTPARAMS_LEN >> 10, addr_sp);
 259
 260         /*
 261          * Finally, we set up a new (bigger) stack.
 262          *
 263          * Leave some safety gap for SP, force alignment on 16 byte boundary
 264          * Clear initial stack frame
 265          */
 266         addr_sp -= 16;
 267         addr_sp &= ~0xF;
 268         s = (ulong *)addr_sp;
 269         *s-- = 0;
 270         *s-- = 0;
 271         addr_sp = (ulong)s;
 272         debug ("Stack Pointer at: %08lx\n", addr_sp);
 273
 274         /*
 275          * Save local variables to board info struct
 276          */
 277         bd->bi_memstart = CONFIG_SYS_SDRAM_BASE;        /* start of  DRAM memory */
 278         bd->bi_memsize  = gd->ram_size;         /* size  of  DRAM memory in bytes */
 279         bd->bi_baudrate = gd->baudrate;         /* Console Baudrate */
 280
 281         memcpy (id, (void *)gd, sizeof (gd_t));
 282
 283         /* On the purple board we copy the code in a special way
 284          * in order to solve flash problems
 285          */
 286 #ifdef CONFIG_PURPLE
 287         copy_code(addr);
 288 #endif
 289
 290         relocate_code (addr_sp, id, addr);
 291
 292         /* NOTREACHED - relocate_code() does not return */
 293 }
 294 /************************************************************************
 295  *
 296  * This is the next part if the initialization sequence: we are now
 297  * running from RAM and have a "normal" C environment, i. e. global
 298  * data can be written, BSS has been cleared, the stack size in not
 299  * that critical any more, etc.
 300  *
 301  ************************************************************************
 302  */
 303
 304 void board_init_r (gd_t *id, ulong dest_addr)
 305 {
 306         cmd_tbl_t *cmdtp;
 307 #ifndef CONFIG_SYS_NO_FLASH
 308         ulong size;
 309 #endif
 310         extern void malloc_bin_reloc (void);
 311 #ifndef CONFIG_ENV_IS_NOWHERE
 312         extern char * env_name_spec;
 313 #endif
 314         char *s, *e;
 315         bd_t *bd;
 316         int i;
 317
 318         gd = id;
 319         gd->flags |= GD_FLG_RELOC;      /* tell others: relocation done */
 320
 321         debug ("Now running in RAM - U-Boot at: %08lx\n", dest_addr);
 322
 323         gd->reloc_off = dest_addr - CONFIG_SYS_MONITOR_BASE;
 324
 325         monitor_flash_len = (ulong)&uboot_end_data - dest_addr;
 326
 327         /*
 328          * We have to relocate the command table manually
 329          */
 330         for (cmdtp = &__u_boot_cmd_start; cmdtp !=  &__u_boot_cmd_end; cmdtp++) {
 331                 ulong addr;
 332
 333                 addr = (ulong) (cmdtp->cmd) + gd->reloc_off;
 334 #if 0
 335                 printf ("Command \"%s\": 0x%08lx => 0x%08lx\n",
 336                                 cmdtp->name, (ulong) (cmdtp->cmd), addr);
 337 #endif
 338                 cmdtp->cmd =
 339                         (int (*)(struct cmd_tbl_s *, int, int, char *[]))addr;
 340
 341                 addr = (ulong)(cmdtp->name) + gd->reloc_off;
 342                 cmdtp->name = (char *)addr;
 343
 344                 if (cmdtp->usage) {
 345                         addr = (ulong)(cmdtp->usage) + gd->reloc_off;
 346                         cmdtp->usage = (char *)addr;
 347                 }
 348 #ifdef  CONFIG_SYS_LONGHELP
 349                 if (cmdtp->help) {
 350                         addr = (ulong)(cmdtp->help) + gd->reloc_off;
 351                         cmdtp->help = (char *)addr;
 352                 }
 353 #endif
 354         }
 355         /* there are some other pointer constants we must deal with */
 356 #ifndef CONFIG_ENV_IS_NOWHERE
 357         env_name_spec += gd->reloc_off;
 358 #endif
 359
 360         bd = gd->bd;
 361
 362 #ifndef CONFIG_SYS_NO_FLASH
 363         /* configure available FLASH banks */
 364         size = flash_init();
 365         display_flash_config (size);
 366         bd->bi_flashsize = size;
 367 #endif
 368
 369         bd->bi_flashstart = CONFIG_SYS_FLASH_BASE;
 370 #if CONFIG_SYS_MONITOR_BASE == CONFIG_SYS_FLASH_BASE
 371         bd->bi_flashoffset = monitor_flash_len; /* reserved area for U-Boot */
 372 #else
 373         bd->bi_flashoffset = 0;
 374 #endif
 375
 376         /* initialize malloc() area */
 377         mem_malloc_init();
 378         malloc_bin_reloc();
 379
 380         /* relocate environment function pointers etc. */
 381         env_relocate();
 382
 383         /* board MAC address */
 384         s = getenv ("ethaddr");
 385         for (i = 0; i < 6; ++i) {
 386                 bd->bi_enetaddr[i] = s ? simple_strtoul (s, &e, 16) : 0;
 387                 if (s)
 388                         s = (*e) ? e + 1 : e;
 389         }
 390
 391         /* IP Address */
 392         bd->bi_ip_addr = getenv_IPaddr("ipaddr");
 393
 394 #if defined(CONFIG_PCI)
 395         /*
 396          * Do pci configuration
 397          */
 398         pci_init();
 399 #endif
 400
 401 /** leave this here (after malloc(), environment and PCI are working) **/
 402         /* Initialize devices */
 403         devices_init ();
 404
 405         jumptable_init ();
 406
 407         /* Initialize the console (after the relocation and devices init) */
 408         console_init_r ();
 409 /** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** **/
 410
 411         /* Initialize from environment */
 412         if ((s = getenv ("loadaddr")) != NULL) {
 413                 load_addr = simple_strtoul (s, NULL, 16);
 414         }
 415 #if defined(CONFIG_CMD_NET)
 416         if ((s = getenv ("bootfile")) != NULL) {
 417                 copy_filename (BootFile, s, sizeof (BootFile));
 418         }
 419 #endif
 420
 421 #ifdef CONFIG_CMD_NAND
 422         puts ("NAND:  ");
 423         nand_init ();           /* go init the NAND */
 424 #endif
 425
 426 #ifdef CONFIG_CMD_SPI
 427         puts ("SPI:   ");
 428         spi_init ();            /* go init the SPI */
 429         puts ("ready\n");
 430 #endif
 431
 432 #if defined(CONFIG_MISC_INIT_R)
 433         /* miscellaneous platform dependent initialisations */
 434         misc_init_r ();
 435 #endif
 436
 437 #if defined(CONFIG_CMD_NET)
 438 #if defined(CONFIG_NET_MULTI)
 439         puts ("Net:   ");
 440 #endif
 441         eth_initialize(gd->bd);
 442 #endif
 443
 444         /* main_loop() can return to retry autoboot, if so just run it again. */
 445         for (;;) {
 446                 main_loop ();
 447         }
 448
 449         /* NOTREACHED - no way out of command loop except booting */
 450 }
 451
 452 void hang (void)
 453 {
 454         puts ("### ERROR ### Please RESET the board ###\n");
 455         for (;;);
 456 }