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