board/altera/dk1c20/flash.c

   1 /*
   2  * (C) Copyright 2000
   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
  25 #include <common.h>
  26 #include <nios.h>
  27
  28 /*
  29  * include common flash code (for altera boards)
  30  */
  31 #include "../common/flash.c"
  32
  33 /*----------------------------------------------------------------------*/
  34 #define BANKSZ          CONFIG_SYS_FLASH_SIZE
  35 #define SECTSZ          (64 * 1024)
  36 #define USERFLASH       (2 * 1024 * 1024)       /* bottom 2 MB for user */
  37
  38 /*----------------------------------------------------------------------*/
  39 unsigned long flash_init (void)
  40 {
  41         int i;
  42         unsigned long addr;
  43         flash_info_t *fli = &flash_info[0];
  44
  45         fli->size = BANKSZ;
  46         fli->sector_count = CONFIG_SYS_MAX_FLASH_SECT;
  47         fli->flash_id = FLASH_MAN_AMD + FLASH_AMDLV065D;
  48
  49         addr = CONFIG_SYS_FLASH_BASE;
  50         for (i = 0; i < fli->sector_count; ++i) {
  51                 fli->start[i] = addr;
  52                 addr += SECTSZ;
  53
  54                 /* Protect all but 2 MByte user area */
  55                 if (addr < (CONFIG_SYS_FLASH_BASE + USERFLASH))
  56                         fli->protect[i] = 0;
  57                 else
  58                         fli->protect[i] = 1;
  59         }
  60
  61         return (BANKSZ);
  62 }