ecosflash/flash.c

   1 /*
   2 #####ECOSGPLCOPYRIGHTBEGIN####
   3 ## -------------------------------------------
   4 ## This file is part of eCos, the Embedded Configurable Operating System.
   5 ## Copyright (C) 2008 Øyvind Harboe
   6 ##
   7 ## eCos is free software; you can redistribute it and/or modify it under
   8 ## the terms of the GNU General Public License as published by the Free
   9 ## Software Foundation; either version 2 or (at your option) any later version.
  10 ##
  11 ## eCos is distributed in the hope that it will be useful, but WITHOUT ANY
  12 ## WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13 ## FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14 ## for more details.
  15 ##
  16 ## You should have received a copy of the GNU General Public License along
  17 ## with eCos; if not, write to the Free Software Foundation, Inc.,
  18 ## 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
  19 ##
  20 ## As a special exception, if other files instantiate templates or use macros
  21 ## or inline functions from this file, or you compile this file and link it
  22 ## with other works to produce a work based on this file, this file does not
  23 ## by itself cause the resulting work to be covered by the GNU General Public
  24 ## License. However the source code for this file must still be made available
  25 ## in accordance with section (3) of the GNU General Public License.
  26 ##
  27 ## This exception does not invalidate any other reasons why a work based on
  28 ## this file might be covered by the GNU General Public License.
  29 ## -------------------------------------------
  30 #####ECOSGPLCOPYRIGHTEND####
  31 */
  32
  33 #include <string.h>
  34 #define _FLASH_PRIVATE_
  35 #include <cyg/io/flash.h>
  36
  37
  38
  39 int myprintf(char *format, ...)
  40 {
  41   return 0;
  42 }
  43
  44 extern char _start_bss_clear;
  45 extern char __bss_end__;
  46
  47 int init()
  48 {
  49         // set up runtime environment
  50         char *t;
  51         for (t=&_start_bss_clear; t<&__bss_end__; t++)
  52         {
  53                 *t=0;
  54         }
  55         return flash_init((_printf *)&myprintf);
  56
  57 }
  58
  59
  60 int checkFlash(void *addr, int len)
  61 {
  62     // Return error for illegal addresses
  63     if ((addr<flash_info.start)||(addr>flash_info.end))
  64         return FLASH_ERR_INVALID;
  65     if ((((cyg_uint8 *)addr)+len)>(cyg_uint8 *)flash_info.end)
  66         return FLASH_ERR_INVALID;
  67     return FLASH_ERR_OK;
  68 }
  69
  70
  71 int erase(void *address, int len)
  72 {
  73         int retval;
  74         void *failAddress;
  75
  76         retval=checkFlash(address, len);
  77         if (retval!=0)
  78                 return retval;
  79
  80         retval=init();
  81         if (retval!=0)
  82                 return retval;
  83         return flash_erase(address, len, &failAddress);
  84 }
  85
  86
  87
  88 extern char _end;
  89
  90 // Data follows immediately after program, long word aligned.
  91 int program(void *buffer, void *address, int len)
  92 {
  93         int retval;
  94         void *failAddress;
  95         retval=checkFlash(address, len);
  96         if (retval!=0)
  97                 return retval;
  98
  99         retval=init();
 100         if (retval!=0)
 101                 return retval;
 102         //int flash_program(void *_addr, void *_data, int len, void **err_addr)
 103         return flash_program(address, buffer, len, &failAddress);
 104 }