onenand_ipl/onenand_boot.c

   1 /*
   2  * (C) Copyright 2005-2008 Samsung Electronics
   3  * Kyungmin Park <kyungmin.park@samsung.com>
   4  *
   5  * Derived from x-loader
   6  *
   7  * See file CREDITS for list of people who contributed to this
   8  * project.
   9  *
  10  * This program is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU General Public License as
  12  * published by the Free Software Foundation; either version 2 of
  13  * the License, or (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  23  * MA 02111-1307 USA
  24  */
  25
  26 #include <common.h>
  27 #include <version.h>
  28
  29 #include "onenand_ipl.h"
  30
  31 #ifdef CONFIG_SYS_PRINTF
  32 int print_info(void)
  33 {
  34         printf(XLOADER_VERSION);
  35
  36         return 0;
  37 }
  38 #endif
  39
  40 typedef int (init_fnc_t)(void);
  41
  42 init_fnc_t *init_sequence[] = {
  43         board_init,             /* basic board dependent setup */
  44 #ifdef CONFIG_SYS_PRINTF
  45         serial_init,            /* serial communications setup */
  46         print_info,
  47 #endif
  48         NULL,
  49 };
  50
  51 void start_oneboot(void)
  52 {
  53         init_fnc_t **init_fnc_ptr;
  54         uchar *buf;
  55
  56         for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
  57                 if ((*init_fnc_ptr)() != 0)
  58                         hang();
  59         }
  60
  61         buf = (uchar *) CONFIG_SYS_LOAD_ADDR;
  62
  63         if (!onenand_read_block0(buf))
  64                 buf += ONENAND_BLOCK_SIZE;
  65
  66         if (buf == (uchar *)CONFIG_SYS_LOAD_ADDR)
  67                 hang();
  68
  69         /* go run U-Boot and never return */
  70         printf("Starting OS Bootloader...\n");
  71         ((init_fnc_t *)CONFIG_SYS_LOAD_ADDR)();
  72
  73         /* should never come here */
  74 }
  75
  76 void hang(void)
  77 {
  78         /* if board_hang() returns, hange here */
  79         printf("X-Loader hangs\n");
  80         for (;;);
  81 }