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 extern int timer_init(void);
  45
  46 extern int incaip_set_cpuclk(void);
  47
  48 extern ulong uboot_end_data;
  49 extern ulong uboot_end;
  50
  51 ulong monitor_flash_len;
  52
  53 const char version_string[] =
  54         U_BOOT_VERSION" (" __DATE__ " - " __TIME__ ")";
  55
  56 static char *failed = "*** failed ***\n";
  57
  58 /*
  59  * Begin and End of memory area for malloc(), and current "brk"
  60  */
  61 static ulong mem_malloc_start;
  62 static ulong mem_malloc_end;
  63 static ulong mem_malloc_brk;
  64
  65 /*
  66  * mips_io_port_base is the begin of the address space to which x86 style
  67  * I/O ports are mapped.
  68  */
  69 unsigned long mips_io_port_base = -1;
  70
  71 /*
  72  * The Malloc area is immediately below the monitor copy in DRAM
  73  */
  74 static void mem_malloc_init (void)
  75 {
  76         ulong dest_addr = CFG_MONITOR_BASE + gd->reloc_off;
  77
  78         mem_malloc_end = dest_addr;
  79         mem_malloc_start = dest_addr - TOTAL_MALLOC_LEN;
  80         mem_malloc_brk = mem_malloc_start;
  81
  82         memset ((void *) mem_malloc_start,
  83                 0,
  84                 mem_malloc_end - mem_malloc_start);
  85 }
  86
  87 void *sbrk (ptrdiff_t increment)
  88 {
  89         ulong old = mem_malloc_brk;
  90         ulong new = old + increment;
  91
  92         if ((new < mem_malloc_start) || (new > mem_malloc_end)) {
  93                 return (NULL);
  94         }
  95         mem_malloc_brk = new;
  96         return ((void *) old);
  97 }
  98
  99
 100 static int init_func_ram (void)
 101 {
 102 #ifdef  CONFIG_BOARD_TYPES
 103         int board_type = gd->board_type;
 104 #else
 105         int board_type = 0;     /* use dummy arg */
 106 #endif
 107         puts ("DRAM:  ");
 108
 109         if ((gd->ram_size = initdram (board_type)) > 0) {
 110                 print_size (gd->ram_size, "\n");
 111                 return (0);
 112         }
 113         puts (failed);
 114         return (1);
 115 }
 116
 117 static int display_banner(void)
 118 {
 119
 120         printf ("\n\n%s\n\n", version_string);
 121         return (0);
 122 }
 123
 124 #ifndef CFG_NO_FLASH
 125 static void display_flash_config(ulong size)
 126 {
 127         puts ("Flash: ");
 128         print_size (size, "\n");
 129 }
 130 #endif
 131
 132 static int init_baudrate (void)
 133 {
 134         char tmp[64];   /* long enough for environment variables */
 135         int i = getenv_r ("baudrate", tmp, sizeof (tmp));
 136
 137         gd->baudrate = (i > 0)
 138                         ? (int) simple_strtoul (tmp, NULL, 10)
 139                         : CONFIG_BAUDRATE;
 140
 141         return (0);
 142 }
 143
 144
 145 /*
 146  * Breath some life into the board...
 147  *
 148  * The first part of initialization is running from Flash memory;
 149  * its main purpose is to initialize the RAM so that we
 150  * can relocate the monitor code to RAM.
 151  */
 152
 153 /*
 154  * All attempts to come up with a "common" initialization sequence
 155  * that works for all boards and architectures failed: some of the
 156  * requirements are just _too_ different. To get rid of the resulting
 157  * mess of board dependend #ifdef'ed code we now make the whole
 158  * initialization sequence configurable to the user.
 159  *
 160  * The requirements for any new initalization function is simple: it
 161  * receives a pointer to the "global data" structure as it's only
 162  * argument, and returns an integer return code, where 0 means
 163  * "continue" and != 0 means "fatal error, hang the system".
 164  */
 165 typedef int (init_fnc_t) (void);
 166
 167 init_fnc_t *init_sequence[] = {
 168         timer_init,
 169         env_init,               /* initialize environment */
 170 #ifdef CONFIG_INCA_IP
 171         incaip_set_cpuclk,      /* set cpu clock according to environment variable */
 172 #endif
 173         init_baudrate,          /* initialze baudrate settings */
 174         serial_init,            /* serial communications setup */
 175         console_init_f,
 176         display_banner,         /* say that we are here */
 177         checkboard,
 178         init_func_ram,
 179         NULL,
 180 };
 181
 182
 183 void board_init_f(ulong bootflag)
 184 {
 185         gd_t gd_data, *id;
 186         bd_t *bd;
 187         init_fnc_t **init_fnc_ptr;
 188         ulong addr, addr_sp, len = (ulong)&uboot_end - CFG_MONITOR_BASE;
 189         ulong *s;
 190 #ifdef CONFIG_PURPLE
 191         void copy_code (ulong);
 192 #endif
 193
 194         /* Pointer is writable since we allocated a register for it.
 195          */
 196         gd = &gd_data;
 197         /* compiler optimization barrier needed for GCC >= 3.4 */
 198         __asm__ __volatile__("": : :"memory");
 199
 200         memset ((void *)gd, 0, sizeof (gd_t));
 201
 202         for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
 203                 if ((*init_fnc_ptr)() != 0) {
 204                         hang ();
 205                 }
 206         }
 207
 208         /*
 209          * Now that we have DRAM mapped and working, we can
 210          * relocate the code and continue running from DRAM.
 211          */
 212         addr = CFG_SDRAM_BASE + gd->ram_size;
 213
 214         /* We can reserve some RAM "on top" here.
 215          */
 216
 217         /* round down to next 4 kB limit.
 218          */
 219         addr &= ~(4096 - 1);
 220         debug ("Top of RAM usable for U-Boot at: %08lx\n", addr);
 221
 222         /* Reserve memory for U-Boot code, data & bss
 223          * round down to next 16 kB limit
 224          */
 225         addr -= len;
 226         addr &= ~(16 * 1024 - 1);
 227
 228         debug ("Reserving %ldk for U-Boot at: %08lx\n", len >> 10, addr);
 229
 230          /* Reserve memory for malloc() arena.
 231          */
 232         addr_sp = addr - TOTAL_MALLOC_LEN;
 233         debug ("Reserving %dk for malloc() at: %08lx\n",
 234                         TOTAL_MALLOC_LEN >> 10, addr_sp);
 235
 236         /*
 237          * (permanently) allocate a Board Info struct
 238          * and a permanent copy of the "global" data
 239          */
 240         addr_sp -= sizeof(bd_t);
 241         bd = (bd_t *)addr_sp;
 242         gd->bd = bd;
 243         debug ("Reserving %d Bytes for Board Info at: %08lx\n",
 244                         sizeof(bd_t), addr_sp);
 245
 246         addr_sp -= sizeof(gd_t);
 247         id = (gd_t *)addr_sp;
 248         debug ("Reserving %d Bytes for Global Data at: %08lx\n",
 249                         sizeof (gd_t), addr_sp);
 250
 251         /* Reserve memory for boot params.
 252          */
 253         addr_sp -= CFG_BOOTPARAMS_LEN;
 254         bd->bi_boot_params = addr_sp;
 255         debug ("Reserving %dk for boot params() at: %08lx\n",
 256                         CFG_BOOTPARAMS_LEN >> 10, addr_sp);
 257
 258         /*
 259          * Finally, we set up a new (bigger) stack.
 260          *
 261          * Leave some safety gap for SP, force alignment on 16 byte boundary
 262          * Clear initial stack frame
 263          */
 264         addr_sp -= 16;
 265         addr_sp &= ~0xF;
 266         s = (ulong *)addr_sp;
 267         *s-- = 0;
 268         *s-- = 0;
 269         addr_sp = (ulong)s;
 270         debug ("Stack Pointer at: %08lx\n", addr_sp);
 271
 272         /*
 273          * Save local variables to board info struct
 274          */
 275         bd->bi_memstart = CFG_SDRAM_BASE;       /* start of  DRAM memory */
 276         bd->bi_memsize  = gd->ram_size;         /* size  of  DRAM memory in bytes */
 277         bd->bi_baudrate = gd->baudrate;         /* Console Baudrate */
 278
 279         memcpy (id, (void *)gd, sizeof (gd_t));
 280
 281         /* On the purple board we copy the code in a special way
 282          * in order to solve flash problems
 283          */
 284 #ifdef CONFIG_PURPLE
 285         copy_code(addr);
 286 #endif
 287
 288         relocate_code (addr_sp, id, addr);
 289
 290         /* NOTREACHED - relocate_code() does not return */
 291 }
 292 /************************************************************************
 293  *
 294  * This is the next part if the initialization sequence: we are now
 295  * running from RAM and have a "normal" C environment, i. e. global
 296  * data can be written, BSS has been cleared, the stack size in not
 297  * that critical any more, etc.
 298  *
 299  ************************************************************************
 300  */
 301
 302 void board_init_r (gd_t *id, ulong dest_addr)
 303 {
 304         cmd_tbl_t *cmdtp;
 305 #ifndef CFG_NO_FLASH
 306         ulong size;
 307 #endif
 308         extern void malloc_bin_reloc (void);
 309 #ifndef CFG_ENV_IS_NOWHERE
 310         extern char * env_name_spec;
 311 #endif
 312         char *s, *e;
 313         bd_t *bd;
 314         int i;
 315
 316         gd = id;
 317         gd->flags |= GD_FLG_RELOC;      /* tell others: relocation done */
 318
 319         debug ("Now running in RAM - U-Boot at: %08lx\n", dest_addr);
 320
 321         gd->reloc_off = dest_addr - CFG_MONITOR_BASE;
 322
 323         monitor_flash_len = (ulong)&uboot_end_data - dest_addr;
 324
 325         /*
 326          * We have to relocate the command table manually
 327          */
 328         for (cmdtp = &__u_boot_cmd_start; cmdtp !=  &__u_boot_cmd_end; cmdtp++) {
 329                 ulong addr;
 330
 331                 addr = (ulong) (cmdtp->cmd) + gd->reloc_off;
 332 #if 0
 333                 printf ("Command \"%s\": 0x%08lx => 0x%08lx\n",
 334                                 cmdtp->name, (ulong) (cmdtp->cmd), addr);
 335 #endif
 336                 cmdtp->cmd =
 337                         (int (*)(struct cmd_tbl_s *, int, int, char *[]))addr;
 338
 339                 addr = (ulong)(cmdtp->name) + gd->reloc_off;
 340                 cmdtp->name = (char *)addr;
 341
 342                 if (cmdtp->usage) {
 343                         addr = (ulong)(cmdtp->usage) + gd->reloc_off;
 344                         cmdtp->usage = (char *)addr;
 345                 }
 346 #ifdef  CFG_LONGHELP
 347                 if (cmdtp->help) {
 348                         addr = (ulong)(cmdtp->help) + gd->reloc_off;
 349                         cmdtp->help = (char *)addr;
 350                 }
 351 #endif
 352         }
 353         /* there are some other pointer constants we must deal with */
 354 #ifndef CFG_ENV_IS_NOWHERE
 355         env_name_spec += gd->reloc_off;
 356 #endif
 357
 358         bd = gd->bd;
 359
 360 #ifndef CFG_NO_FLASH
 361         /* configure available FLASH banks */
 362         size = flash_init();
 363         display_flash_config (size);
 364         bd->bi_flashsize = size;
 365 #endif
 366
 367         bd->bi_flashstart = CFG_FLASH_BASE;
 368 #if CFG_MONITOR_BASE == CFG_FLASH_BASE
 369         bd->bi_flashoffset = monitor_flash_len; /* reserved area for U-Boot */
 370 #else
 371         bd->bi_flashoffset = 0;
 372 #endif
 373
 374         /* initialize malloc() area */
 375         mem_malloc_init();
 376         malloc_bin_reloc();
 377
 378         /* relocate environment function pointers etc. */
 379         env_relocate();
 380
 381         /* board MAC address */
 382         s = getenv ("ethaddr");
 383         for (i = 0; i < 6; ++i) {
 384                 bd->bi_enetaddr[i] = s ? simple_strtoul (s, &e, 16) : 0;
 385                 if (s)
 386                         s = (*e) ? e + 1 : e;
 387         }
 388
 389         /* IP Address */
 390         bd->bi_ip_addr = getenv_IPaddr("ipaddr");
 391
 392 #if defined(CONFIG_PCI)
 393         /*
 394          * Do pci configuration
 395          */
 396         pci_init();
 397 #endif
 398
 399 /** leave this here (after malloc(), environment and PCI are working) **/
 400         /* Initialize devices */
 401         devices_init ();
 402
 403         jumptable_init ();
 404
 405         /* Initialize the console (after the relocation and devices init) */
 406         console_init_r ();
 407 /** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** **/
 408
 409         /* Initialize from environment */
 410         if ((s = getenv ("loadaddr")) != NULL) {
 411                 load_addr = simple_strtoul (s, NULL, 16);
 412         }
 413 #if defined(CONFIG_CMD_NET)
 414         if ((s = getenv ("bootfile")) != NULL) {
 415                 copy_filename (BootFile, s, sizeof (BootFile));
 416         }
 417 #endif
 418
 419 #if defined(CONFIG_MISC_INIT_R)
 420         /* miscellaneous platform dependent initialisations */
 421         misc_init_r ();
 422 #endif
 423
 424 #if defined(CONFIG_CMD_NET)
 425 #if defined(CONFIG_NET_MULTI)
 426         puts ("Net:   ");
 427 #endif
 428         eth_initialize(gd->bd);
 429 #endif
 430
 431         /* main_loop() can return to retry autoboot, if so just run it again. */
 432         for (;;) {
 433                 main_loop ();
 434         }
 435
 436         /* NOTREACHED - no way out of command loop except booting */
 437 }
 438
 439 void hang (void)
 440 {
 441         puts ("### ERROR ### Please RESET the board ###\n");
 442         for (;;);
 443 }