ecosflash/flash.c

   1 /***************************************************************************
   2  *   Copyright (C) 2008 Øyvind Harboe                                      *
   3  *   oyvind.harboe@zylin.com                                               *
   4  *                                                                         *
   5  *   This program is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation; either version 2 of the License, or     *
   8  *   (at your option) any later version.                                   *
   9  *                                                                         *
  10  *   This program is distributed in the hope that it will be useful,       *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15  *   You should have received a copy of the GNU General Public License     *
  16  *   along with this program; if not, write to the                         *
  17  *   Free Software Foundation, Inc.,                                       *
  18  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  19  ***************************************************************************/
  20
  21 #include <string.h>
  22 #define _FLASH_PRIVATE_
  23 #include <cyg/io/flash.h>
  24
  25
  26
  27 int myprintf(char *format, ...)
  28 {
  29   return 0;
  30 }
  31
  32 extern char _start_bss_clear;
  33 extern char __bss_end__;
  34
  35 int init()
  36 {
  37         // set up runtime environment
  38         char *t;
  39         for (t=&_start_bss_clear; t<&__bss_end__; t++)
  40         {
  41                 *t=0;
  42         }
  43         return flash_init((_printf *)&myprintf);
  44
  45 }
  46
  47
  48 int checkFlash(void *addr, int len)
  49 {
  50     // Return error for illegal addresses
  51     if ((addr<flash_info.start)||(addr>flash_info.end))
  52         return FLASH_ERR_INVALID;
  53     if ((((cyg_uint8 *)addr)+len)>(cyg_uint8 *)flash_info.end)
  54         return FLASH_ERR_INVALID;
  55     return FLASH_ERR_OK;
  56 }
  57
  58
  59 int erase(void *address, int len)
  60 {
  61         int retval;
  62         void *failAddress;
  63
  64         retval=checkFlash(address, len);
  65         if (retval!=0)
  66                 return retval;
  67
  68         retval=init();
  69         if (retval!=0)
  70                 return retval;
  71         return flash_erase(address, len, &failAddress);
  72 }
  73
  74
  75
  76 extern char _end;
  77
  78 // Data follows immediately after program, long word aligned.
  79 int program(void *buffer, void *address, int len)
  80 {
  81         int retval;
  82         void *failAddress;
  83         retval=checkFlash(address, len);
  84         if (retval!=0)
  85                 return retval;
  86
  87         retval=init();
  88         if (retval!=0)
  89                 return retval;
  90         //int flash_program(void *_addr, void *_data, int len, void **err_addr)
  91         return flash_program(address, buffer, len, &failAddress);
  92 }