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