+ c->sectors[i].is_erased = 0;
+ }
+ }
+}
+
+/* lookup flash bank by address */
+flash_bank_t *get_flash_bank_by_addr(target_t *target, u32 addr)
+{
+ flash_bank_t *c;
+
+ /* cycle through bank list */
+ for (c = flash_banks; c; c = c->next)
+ {
+ int retval;
+ retval = c->driver->auto_probe(c);
+
+ if (retval != ERROR_OK)
+ {
+ LOG_ERROR("auto_probe failed %d\n", retval);
+ return NULL;
+ }
+ /* check whether address belongs to this flash bank */
+ if ((addr >= c->base) && (addr < c->base + c->size) && target == c->target)
+ return c;
+ }
+ LOG_ERROR("No flash at address 0x%08x\n", addr);
+ return NULL;
+}
+
+/* erase given flash region, selects proper bank according to target and address */
+int flash_erase_address_range(target_t *target, u32 addr, u32 length)
+{
+ flash_bank_t *c;
+ int first = -1;
+ int last = -1;
+ int i;
+
+ if ((c = get_flash_bank_by_addr(target, addr)) == NULL)
+ return ERROR_FLASH_DST_OUT_OF_BANK; /* no corresponding bank found */
+
+ if (c->size == 0 || c->num_sectors == 0)
+ return ERROR_FLASH_BANK_INVALID;
+
+ if (length == 0)
+ {
+ /* special case, erase whole bank when length is zero */
+ if (addr != c->base)
+ return ERROR_FLASH_DST_BREAKS_ALIGNMENT;
+
+ return flash_driver_erase(c, 0, c->num_sectors - 1);
+ }
+
+ /* check whether it fits */
+ if (addr + length > c->base + c->size)
+ return ERROR_FLASH_DST_BREAKS_ALIGNMENT;
+
+ addr -= c->base;
+
+ for (i = 0; i < c->num_sectors; i++)
+ {
+ /* check whether sector overlaps with the given range and is not yet erased */
+ if (addr < c->sectors[i].offset + c->sectors[i].size && addr + length > c->sectors[i].offset && c->sectors[i].is_erased != 1) {
+ /* if first is not set yet then this is the first sector */
+ if (first == -1)
+ first = i;
+ last = i; /* and it is the last one so far in any case */