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 <timestamp.h>
  29 #include <version.h>
  30 #include <net.h>
  31 #include <environment.h>
  32 #include <nand.h>
  33 #include <onenand_uboot.h>
  34 #include <spi.h>
  35
  36 DECLARE_GLOBAL_DATA_PTR;
  37
  38 #if ( ((CONFIG_ENV_ADDR+CONFIG_ENV_SIZE) < CONFIG_SYS_MONITOR_BASE) || \
  39       (CONFIG_ENV_ADDR >= (CONFIG_SYS_MONITOR_BASE + CONFIG_SYS_MONITOR_LEN)) ) || \
  40     defined(CONFIG_ENV_IS_IN_NVRAM)
  41 #define TOTAL_MALLOC_LEN        (CONFIG_SYS_MALLOC_LEN + CONFIG_ENV_SIZE)
  42 #else
  43 #define TOTAL_MALLOC_LEN        CONFIG_SYS_MALLOC_LEN
  44 #endif
  45
  46 #undef DEBUG
  47
  48 extern int timer_init(void);
  49
  50 extern int incaip_set_cpuclk(void);
  51
  52 extern ulong uboot_end_data;
  53 extern ulong uboot_end;
  54
  55 ulong monitor_flash_len;
  56
  57 const char version_string[] =
  58         U_BOOT_VERSION" (" U_BOOT_DATE " - " U_BOOT_TIME ")";
  59
  60 static char *failed = "*** failed ***\n";
  61
  62 /*
  63  * Begin and End of memory area for malloc(), and current "brk"
  64  */
  65 static ulong mem_malloc_start;
  66 static ulong mem_malloc_end;
  67 static ulong mem_malloc_brk;
  68
  69 /*
  70  * mips_io_port_base is the begin of the address space to which x86 style
  71  * I/O ports are mapped.
  72  */
  73 unsigned long mips_io_port_base = -1;
  74
  75 int __board_early_init_f(void)
  76 {
  77         /*
  78          * Nothing to do in this dummy implementation
  79          */
  80         return 0;
  81 }
  82 int board_early_init_f(void) __attribute__((weak, alias("__board_early_init_f")));
  83
  84 /*
  85  * The Malloc area is immediately below the monitor copy in DRAM
  86  */
  87 static void mem_malloc_init (void)
  88 {
  89         ulong dest_addr = CONFIG_SYS_MONITOR_BASE + gd->reloc_off;
  90
  91         mem_malloc_end = dest_addr;
  92         mem_malloc_start = dest_addr - TOTAL_MALLOC_LEN;
  93         mem_malloc_brk = mem_malloc_start;
  94
  95         memset ((void *) mem_malloc_start,
  96                 0,
  97                 mem_malloc_end - mem_malloc_start);
  98 }
  99
 100 void *sbrk (ptrdiff_t increment)
 101 {
 102         ulong old = mem_malloc_brk;
 103         ulong new = old + increment;
 104
 105         if ((new < mem_malloc_start) || (new > mem_malloc_end)) {
 106                 return (NULL);
 107         }
 108         mem_malloc_brk = new;
 109         return ((void *) old);
 110 }
 111
 112
 113 static int init_func_ram (void)
 114 {
 115 #ifdef  CONFIG_BOARD_TYPES
 116         int board_type = gd->board_type;
 117 #else
 118         int board_type = 0;     /* use dummy arg */
 119 #endif
 120         puts ("DRAM:  ");
 121
 122         if ((gd->ram_size = initdram (board_type)) > 0) {
 123                 print_size (gd->ram_size, "\n");
 124                 return (0);
 125         }
 126         puts (failed);
 127         return (1);
 128 }
 129
 130 static int display_banner(void)
 131 {
 132
 133         printf ("\n\n%s\n\n", version_string);
 134         return (0);
 135 }
 136
 137 #ifndef CONFIG_SYS_NO_FLASH
 138 static void display_flash_config(ulong size)
 139 {
 140         puts ("Flash: ");
 141         print_size (size, "\n");
 142 }
 143 #endif
 144
 145 static int init_baudrate (void)
 146 {
 147         char tmp[64];   /* long enough for environment variables */
 148         int i = getenv_r ("baudrate", tmp, sizeof (tmp));
 149
 150         gd->baudrate = (i > 0)
 151                         ? (int) simple_strtoul (tmp, NULL, 10)
 152                         : CONFIG_BAUDRATE;
 153
 154         return (0);
 155 }
 156
 157
 158 /*
 159  * Breath some life into the board...
 160  *
 161  * The first part of initialization is running from Flash memory;
 162  * its main purpose is to initialize the RAM so that we
 163  * can relocate the monitor code to RAM.
 164  */
 165
 166 /*
 167  * All attempts to come up with a "common" initialization sequence
 168  * that works for all boards and architectures failed: some of the
 169  * requirements are just _too_ different. To get rid of the resulting
 170  * mess of board dependend #ifdef'ed code we now make the whole
 171  * initialization sequence configurable to the user.
 172  *
 173  * The requirements for any new initalization function is simple: it
 174  * receives a pointer to the "global data" structure as it's only
 175  * argument, and returns an integer return code, where 0 means
 176  * "continue" and != 0 means "fatal error, hang the system".
 177  */
 178 typedef int (init_fnc_t) (void);
 179
 180 init_fnc_t *init_sequence[] = {
 181         board_early_init_f,
 182         timer_init,
 183         env_init,               /* initialize environment */
 184 #ifdef CONFIG_INCA_IP
 185         incaip_set_cpuclk,      /* set cpu clock according to environment variable */
 186 #endif
 187         init_baudrate,          /* initialze baudrate settings */
 188         serial_init,            /* serial communications setup */
 189         console_init_f,
 190         display_banner,         /* say that we are here */
 191         checkboard,
 192         init_func_ram,
 193         NULL,
 194 };
 195
 196
 197 void board_init_f(ulong bootflag)
 198 {
 199         gd_t gd_data, *id;
 200         bd_t *bd;
 201         init_fnc_t **init_fnc_ptr;
 202         ulong addr, addr_sp, len = (ulong)&uboot_end - CONFIG_SYS_MONITOR_BASE;
 203         ulong *s;
 204 #ifdef CONFIG_PURPLE
 205         void copy_code (ulong);
 206 #endif
 207
 208         /* Pointer is writable since we allocated a register for it.
 209          */
 210         gd = &gd_data;
 211         /* compiler optimization barrier needed for GCC >= 3.4 */
 212         __asm__ __volatile__("": : :"memory");
 213
 214         memset ((void *)gd, 0, sizeof (gd_t));
 215
 216         for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
 217                 if ((*init_fnc_ptr)() != 0) {
 218                         hang ();
 219                 }
 220         }
 221
 222         /*
 223          * Now that we have DRAM mapped and working, we can
 224          * relocate the code and continue running from DRAM.
 225          */
 226         addr = CONFIG_SYS_SDRAM_BASE + gd->ram_size;
 227
 228         /* We can reserve some RAM "on top" here.
 229          */
 230
 231         /* round down to next 4 kB limit.
 232          */
 233         addr &= ~(4096 - 1);
 234         debug ("Top of RAM usable for U-Boot at: %08lx\n", addr);
 235
 236         /* Reserve memory for U-Boot code, data & bss
 237          * round down to next 16 kB limit
 238          */
 239         addr -= len;
 240         addr &= ~(16 * 1024 - 1);
 241
 242         debug ("Reserving %ldk for U-Boot at: %08lx\n", len >> 10, addr);
 243
 244          /* Reserve memory for malloc() arena.
 245          */
 246         addr_sp = addr - TOTAL_MALLOC_LEN;
 247         debug ("Reserving %dk for malloc() at: %08lx\n",
 248                         TOTAL_MALLOC_LEN >> 10, addr_sp);
 249
 250         /*
 251          * (permanently) allocate a Board Info struct
 252          * and a permanent copy of the "global" data
 253          */
 254         addr_sp -= sizeof(bd_t);
 255         bd = (bd_t *)addr_sp;
 256         gd->bd = bd;
 257         debug ("Reserving %zu Bytes for Board Info at: %08lx\n",
 258                         sizeof(bd_t), addr_sp);
 259
 260         addr_sp -= sizeof(gd_t);
 261         id = (gd_t *)addr_sp;
 262         debug ("Reserving %zu Bytes for Global Data at: %08lx\n",
 263                         sizeof (gd_t), addr_sp);
 264
 265         /* Reserve memory for boot params.
 266          */
 267         addr_sp -= CONFIG_SYS_BOOTPARAMS_LEN;
 268         bd->bi_boot_params = addr_sp;
 269         debug ("Reserving %dk for boot params() at: %08lx\n",
 270                         CONFIG_SYS_BOOTPARAMS_LEN >> 10, addr_sp);
 271
 272         /*
 273          * Finally, we set up a new (bigger) stack.
 274          *
 275          * Leave some safety gap for SP, force alignment on 16 byte boundary
 276          * Clear initial stack frame
 277          */
 278         addr_sp -= 16;
 279         addr_sp &= ~0xF;
 280         s = (ulong *)addr_sp;
 281         *s-- = 0;
 282         *s-- = 0;
 283         addr_sp = (ulong)s;
 284         debug ("Stack Pointer at: %08lx\n", addr_sp);
 285
 286         /*
 287          * Save local variables to board info struct
 288          */
 289         bd->bi_memstart = CONFIG_SYS_SDRAM_BASE;        /* start of  DRAM memory */
 290         bd->bi_memsize  = gd->ram_size;         /* size  of  DRAM memory in bytes */
 291         bd->bi_baudrate = gd->baudrate;         /* Console Baudrate */
 292
 293         memcpy (id, (void *)gd, sizeof (gd_t));
 294
 295         /* On the purple board we copy the code in a special way
 296          * in order to solve flash problems
 297          */
 298 #ifdef CONFIG_PURPLE
 299         copy_code(addr);
 300 #endif
 301
 302         relocate_code (addr_sp, id, addr);
 303
 304         /* NOTREACHED - relocate_code() does not return */
 305 }
 306 /************************************************************************
 307  *
 308  * This is the next part if the initialization sequence: we are now
 309  * running from RAM and have a "normal" C environment, i. e. global
 310  * data can be written, BSS has been cleared, the stack size in not
 311  * that critical any more, etc.
 312  *
 313  ************************************************************************
 314  */
 315
 316 void board_init_r (gd_t *id, ulong dest_addr)
 317 {
 318         cmd_tbl_t *cmdtp;
 319 #ifndef CONFIG_SYS_NO_FLASH
 320         ulong size;
 321 #endif
 322         extern void malloc_bin_reloc (void);
 323 #ifndef CONFIG_ENV_IS_NOWHERE
 324         extern char * env_name_spec;
 325 #endif
 326         char *s;
 327         bd_t *bd;
 328
 329         gd = id;
 330         gd->flags |= GD_FLG_RELOC;      /* tell others: relocation done */
 331
 332         debug ("Now running in RAM - U-Boot at: %08lx\n", dest_addr);
 333
 334         gd->reloc_off = dest_addr - CONFIG_SYS_MONITOR_BASE;
 335
 336         monitor_flash_len = (ulong)&uboot_end_data - dest_addr;
 337
 338         /*
 339          * We have to relocate the command table manually
 340          */
 341         for (cmdtp = &__u_boot_cmd_start; cmdtp !=  &__u_boot_cmd_end; cmdtp++) {
 342                 ulong addr;
 343
 344                 addr = (ulong) (cmdtp->cmd) + gd->reloc_off;
 345 #if 0
 346                 printf ("Command \"%s\": 0x%08lx => 0x%08lx\n",
 347                                 cmdtp->name, (ulong) (cmdtp->cmd), addr);
 348 #endif
 349                 cmdtp->cmd =
 350                         (int (*)(struct cmd_tbl_s *, int, int, char *[]))addr;
 351
 352                 addr = (ulong)(cmdtp->name) + gd->reloc_off;
 353                 cmdtp->name = (char *)addr;
 354
 355                 if (cmdtp->usage) {
 356                         addr = (ulong)(cmdtp->usage) + gd->reloc_off;
 357                         cmdtp->usage = (char *)addr;
 358                 }
 359 #ifdef  CONFIG_SYS_LONGHELP
 360                 if (cmdtp->help) {
 361                         addr = (ulong)(cmdtp->help) + gd->reloc_off;
 362                         cmdtp->help = (char *)addr;
 363                 }
 364 #endif
 365         }
 366         /* there are some other pointer constants we must deal with */
 367 #ifndef CONFIG_ENV_IS_NOWHERE
 368         env_name_spec += gd->reloc_off;
 369 #endif
 370
 371         bd = gd->bd;
 372
 373         /* initialize malloc() area */
 374         mem_malloc_init();
 375         malloc_bin_reloc();
 376
 377 #ifndef CONFIG_SYS_NO_FLASH
 378         /* configure available FLASH banks */
 379         size = flash_init();
 380         display_flash_config (size);
 381         bd->bi_flashsize = size;
 382 #endif
 383
 384         bd->bi_flashstart = CONFIG_SYS_FLASH_BASE;
 385 #if CONFIG_SYS_MONITOR_BASE == CONFIG_SYS_FLASH_BASE
 386         bd->bi_flashoffset = monitor_flash_len; /* reserved area for U-Boot */
 387 #else
 388         bd->bi_flashoffset = 0;
 389 #endif
 390
 391 #ifdef CONFIG_CMD_NAND
 392         puts ("NAND:  ");
 393         nand_init ();           /* go init the NAND */
 394 #endif
 395
 396 #if defined(CONFIG_CMD_ONENAND)
 397         onenand_init();
 398 #endif
 399
 400         /* relocate environment function pointers etc. */
 401         env_relocate();
 402
 403         /* IP Address */
 404         bd->bi_ip_addr = getenv_IPaddr("ipaddr");
 405
 406 #if defined(CONFIG_PCI)
 407         /*
 408          * Do pci configuration
 409          */
 410         pci_init();
 411 #endif
 412
 413 /** leave this here (after malloc(), environment and PCI are working) **/
 414         /* Initialize devices */
 415         devices_init ();
 416
 417         jumptable_init ();
 418
 419         /* Initialize the console (after the relocation and devices init) */
 420         console_init_r ();
 421 /** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** **/
 422
 423         /* Initialize from environment */
 424         if ((s = getenv ("loadaddr")) != NULL) {
 425                 load_addr = simple_strtoul (s, NULL, 16);
 426         }
 427 #if defined(CONFIG_CMD_NET)
 428         if ((s = getenv ("bootfile")) != NULL) {
 429                 copy_filename (BootFile, s, sizeof (BootFile));
 430         }
 431 #endif
 432
 433 #ifdef CONFIG_CMD_SPI
 434         puts ("SPI:   ");
 435         spi_init ();            /* go init the SPI */
 436         puts ("ready\n");
 437 #endif
 438
 439 #if defined(CONFIG_MISC_INIT_R)
 440         /* miscellaneous platform dependent initialisations */
 441         misc_init_r ();
 442 #endif
 443
 444 #if defined(CONFIG_CMD_NET)
 445 #if defined(CONFIG_NET_MULTI)
 446         puts ("Net:   ");
 447 #endif
 448         eth_initialize(gd->bd);
 449 #endif
 450
 451         /* main_loop() can return to retry autoboot, if so just run it again. */
 452         for (;;) {
 453                 main_loop ();
 454         }
 455
 456         /* NOTREACHED - no way out of command loop except booting */
 457 }
 458
 459 void hang (void)
 460 {
 461         puts ("### ERROR ### Please RESET the board ###\n");
 462         for (;;);
 463 }