read NAND (my thinking)

[xiangfu]

I read the datesheet and
read the code uboot/cpu/arm920t/s3c24x0/nand_read.c
and there is some function may be we can use ,i am not sure.
like:
/* low level nand read function */
int nand_read_ll(unsigned char *buf, unsigned long start_addr, int size)
{
   int i, j;
   if ((start_addr & NAND_BLOCK_MASK) || (size & NAND_BLOCK_MASK))
       return -1;    /* invalid alignment */
   /* chip Enable */
   nand_select();
   nand_clear_RnB();
   for (i=0; i<10; i++);
   for (i=start_addr; i < (start_addr + size);) {
       j = nand_read_page_ll(buf, i);
       i += j;
       buf += j;
   }
   /* chip Disable */
   nand_deselect();
   return 0;
}
my thinking is:
   1.   store a LED_ON image in NAND flash
   2.   use the OPENOCD read the another LED_ON to the ROM.
   3.   and run the ROM LED_ON , it will read the NAND flash and load
the (1)LED_ON

there is some question,
   1. how can i store a file  in NAND like LED_ON ? use the dfu-util ?
like werner tell me before.
   2. the file must have a size like 1020byte. read the NAND must page
by page ,
      is there must spare in the NAND?
   3. may be i can read the file from NAND to the BUF ,how can i make
the CPU run this code.

THANKS

a beginner