static int update_flash(ulong addr_source, ulong addr_first, ulong size)
{
#ifndef CONFIG_SYS_NO_FLASH
ulong addr_last = addr_first + size - 1;
/* round last address to the sector boundary */
if (flash_sect_roundb(&addr_last) > 0)
return 1;
if (addr_first >= addr_last) {
printf("Error: end address exceeds addressing space\n");
return 1;
}
/* remove protection on processed sectors */
if (update_flash_protect(0, addr_first, addr_last) > 0) {
printf("Error: could not unprotect flash sectors\n");
return 1;
}
printf("Erasing 0x%08lx - 0x%08lx", addr_first, addr_last);
if (flash_sect_erase(addr_first, addr_last) > 0) {
printf("Error: could not erase flash\n");
return 1;
}
printf("Copying to flash...");
if (flash_write((char *)addr_source, addr_first, size) > 0) {
printf("Error: could not copy to flash\n");
return 1;
}
printf("done\n");
/* enable protection on processed sectors */
if (update_flash_protect(1, addr_first, addr_last) > 0) {
printf("Error: could not protect flash sectors\n");
return 1;
}
#endif
return 0;
}
/*
* This function computes the start and end addresses for both
* erase and protect commands. The range of the addresses on which
* either of the commands is to operate can be given in two forms:
* 1. <cmd> start end - operate on <'start', 'end')
* 2. <cmd> start +length - operate on <'start', start + length)
* If the second form is used and the end address doesn't fall on the
* sector boundary, than it will be adjusted to the next sector boundary.
* If it isn't in the flash, the function will fail (return -1).
* Input:
* arg1, arg2: address specification (i.e. both command arguments)
* Output:
* addr_first, addr_last: computed address range
* Return:
* 1: success
* -1: failure (bad format, bad address).
*/
static int
addr_spec(char *arg1, char *arg2, ulong *addr_first, ulong *addr_last)
{
char *ep;
char len_used; /* indicates if the "start +length" form used */
*addr_first = simple_strtoul(arg1, &ep, 16);
if (ep == arg1 || *ep != '\0')
return -1;
len_used = 0;
if (arg2 && *arg2 == '+'){
len_used = 1;
++arg2;
}
*addr_last = simple_strtoul(arg2, &ep, 16);
if (ep == arg2 || *ep != '\0')
return -1;
if (len_used){
/*
* *addr_last has the length, compute correct *addr_last
* XXX watch out for the integer overflow! Right now it is
* checked for in both the callers.
*/
*addr_last = *addr_first + *addr_last - 1;
/*
* It may happen that *addr_last doesn't fall on the sector
* boundary. We want to round such an address to the next
* sector boundary, so that the commands don't fail later on.
*/
if (flash_sect_roundb(addr_last) > 0)
return -1;
} /* "start +length" from used */
return 1;
}
