lib_microblaze/board.c

   1 /*
   2  * (C) Copyright 2007 Michal Simek
   3  * (C) Copyright 2004 Atmark Techno, Inc.
   4  *
   5  * Michal  SIMEK <monstr@monstr.eu>
   6  * Yasushi SHOJI <yashi@atmark-techno.com>
   7  *
   8  * See file CREDITS for list of people who contributed to this
   9  * project.
  10  *
  11  * This program is free software; you can redistribute it and/or
  12  * modify it under the terms of the GNU General Public License as
  13  * published by the Free Software Foundation; either version 2 of
  14  * the License, or (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  24  * MA 02111-1307 USA
  25  */
  26
  27 #include <common.h>
  28 #include <command.h>
  29 #include <malloc.h>
  30 #include <timestamp.h>
  31 #include <version.h>
  32 #include <watchdog.h>
  33
  34 DECLARE_GLOBAL_DATA_PTR;
  35
  36 const char version_string[] = U_BOOT_VERSION " ("U_BOOT_DATE" - "U_BOOT_TIME")";
  37
  38 #ifdef CONFIG_SYS_GPIO_0
  39 extern int gpio_init (void);
  40 #endif
  41 #ifdef CONFIG_SYS_INTC_0
  42 extern int interrupts_init (void);
  43 #endif
  44 #if defined(CONFIG_CMD_NET)
  45 extern int eth_init (bd_t * bis);
  46 #endif
  47
  48 /*
  49  * All attempts to come up with a "common" initialization sequence
  50  * that works for all boards and architectures failed: some of the
  51  * requirements are just _too_ different. To get rid of the resulting
  52  * mess of board dependend #ifdef'ed code we now make the whole
  53  * initialization sequence configurable to the user.
  54  *
  55  * The requirements for any new initalization function is simple: it
  56  * receives a pointer to the "global data" structure as it's only
  57  * argument, and returns an integer return code, where 0 means
  58  * "continue" and != 0 means "fatal error, hang the system".
  59  */
  60 typedef int (init_fnc_t) (void);
  61
  62 init_fnc_t *init_sequence[] = {
  63         env_init,
  64         serial_init,
  65 #ifdef CONFIG_SYS_GPIO_0
  66         gpio_init,
  67 #endif
  68 #ifdef CONFIG_SYS_INTC_0
  69         interrupts_init,
  70 #endif
  71         NULL,
  72 };
  73
  74 void board_init (void)
  75 {
  76         bd_t *bd;
  77         init_fnc_t **init_fnc_ptr;
  78         gd = (gd_t *) CONFIG_SYS_GBL_DATA_OFFSET;
  79 #if defined(CONFIG_CMD_FLASH)
  80         ulong flash_size = 0;
  81 #endif
  82         asm ("nop");    /* FIXME gd is not initialize - wait */
  83         memset ((void *)gd, 0, CONFIG_SYS_GBL_DATA_SIZE);
  84         gd->bd = (bd_t *) (gd + 1);     /* At end of global data */
  85         gd->baudrate = CONFIG_BAUDRATE;
  86         bd = gd->bd;
  87         bd->bi_baudrate = CONFIG_BAUDRATE;
  88         bd->bi_memstart = CONFIG_SYS_SDRAM_BASE;
  89         bd->bi_memsize = CONFIG_SYS_SDRAM_SIZE;
  90         gd->flags |= GD_FLG_RELOC;      /* tell others: relocation done */
  91
  92         /*
  93          * The Malloc area is immediately below the monitor copy in DRAM
  94          * aka CONFIG_SYS_MONITOR_BASE - Note there is no need for reloc_off
  95          * as our monitory code is run from SDRAM
  96          */
  97         mem_malloc_init (CONFIG_SYS_MALLOC_BASE, CONFIG_SYS_MALLOC_LEN);
  98
  99         for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
 100                 WATCHDOG_RESET ();
 101                 if ((*init_fnc_ptr) () != 0) {
 102                         hang ();
 103                 }
 104         }
 105
 106         puts ("SDRAM :\n");
 107         printf ("\t\tIcache:%s\n", icache_status() ? "OK" : "FAIL");
 108         printf ("\t\tDcache:%s\n", dcache_status() ? "OK" : "FAIL");
 109         printf ("\tU-Boot Start:0x%08x\n", TEXT_BASE);
 110
 111 #if defined(CONFIG_CMD_FLASH)
 112         puts ("FLASH: ");
 113         bd->bi_flashstart = CONFIG_SYS_FLASH_BASE;
 114         if (0 < (flash_size = flash_init ())) {
 115                 bd->bi_flashsize = flash_size;
 116                 bd->bi_flashoffset = CONFIG_SYS_FLASH_BASE + flash_size;
 117 # ifdef CONFIG_SYS_FLASH_CHECKSUM
 118                 print_size (flash_size, "");
 119                 /*
 120                  * Compute and print flash CRC if flashchecksum is set to 'y'
 121                  *
 122                  * NOTE: Maybe we should add some WATCHDOG_RESET()? XXX
 123                  */
 124                 s = getenv ("flashchecksum");
 125                 if (s && (*s == 'y')) {
 126                         printf ("  CRC: %08X",
 127                                 crc32 (0, (const unsigned char *) CONFIG_SYS_FLASH_BASE, flash_size)
 128                         );
 129                 }
 130                 putc ('\n');
 131 # else  /* !CONFIG_SYS_FLASH_CHECKSUM */
 132                 print_size (flash_size, "\n");
 133 # endif /* CONFIG_SYS_FLASH_CHECKSUM */
 134         } else {
 135                 puts ("Flash init FAILED");
 136                 bd->bi_flashstart = 0;
 137                 bd->bi_flashsize = 0;
 138                 bd->bi_flashoffset = 0;
 139         }
 140 #endif
 141
 142 #if defined(CONFIG_CMD_NET)
 143         /* IP Address */
 144         bd->bi_ip_addr = getenv_IPaddr ("ipaddr");
 145         eth_init (bd);
 146 #endif
 147
 148         /* relocate environment function pointers etc. */
 149         env_relocate ();
 150
 151         /* main_loop */
 152         for (;;) {
 153                 WATCHDOG_RESET ();
 154                 main_loop ();
 155         }
 156 }
 157
 158 void hang (void)
 159 {
 160         puts ("### ERROR ### Please RESET the board ###\n");
 161         for (;;) ;
 162 }