ecosflash/flash.c

   1 #include <string.h>
   2 #define _FLASH_PRIVATE_
   3 #include <cyg/io/flash.h>
   4
   5
   6
   7 int myprintf(char *format, ...)
   8 {
   9   return 0;
  10 }
  11
  12 extern char _start_bss_clear;
  13 extern char __bss_end__;
  14
  15 int init()
  16 {
  17         // set up runtime environment
  18         char *t;
  19         for (t=&_start_bss_clear; t<&__bss_end__; t++)
  20         {
  21                 *t=0;
  22         }
  23         return flash_init((_printf *)&myprintf);
  24
  25 }
  26
  27
  28 int checkFlash(void *addr, int len)
  29 {
  30     // Return error for illegal addresses
  31     if ((addr<flash_info.start)||(addr>flash_info.end))
  32         return FLASH_ERR_INVALID;
  33     if ((((cyg_uint8 *)addr)+len)>(cyg_uint8 *)flash_info.end)
  34         return FLASH_ERR_INVALID;
  35     return FLASH_ERR_OK;
  36 }
  37
  38
  39 int erase(void *address, int len)
  40 {
  41         int retval;
  42         void *failAddress;
  43
  44         retval=checkFlash(address, len);
  45         if (retval!=0)
  46                 return retval;
  47
  48         retval=init();
  49         if (retval!=0)
  50                 return retval;
  51         return flash_erase(address, len, &failAddress);
  52 }
  53
  54
  55
  56 extern char _end;
  57
  58 // Data follows immediately after program, long word aligned.
  59 int program(void *buffer, void *address, int len)
  60 {
  61         int retval;
  62         void *failAddress;
  63         retval=checkFlash(address, len);
  64         if (retval!=0)
  65                 return retval;
  66
  67         retval=init();
  68         if (retval!=0)
  69                 return retval;
  70         //int flash_program(void *_addr, void *_data, int len, void **err_addr)
  71         return flash_program(address, buffer, len, &failAddress);
  72 }