Add flash_area_read_is_empty to sim
Signed-off-by: Fabio Utzig <utzig@apache.org>
diff --git a/sim/mcuboot-sys/csupport/flash_map.h b/sim/mcuboot-sys/csupport/flash_map.h
index 7622dd0..cc02e7e 100644
--- a/sim/mcuboot-sys/csupport/flash_map.h
+++ b/sim/mcuboot-sys/csupport/flash_map.h
@@ -131,6 +131,14 @@
uint8_t flash_area_erased_val(const struct flash_area *);
/*
+ * Reads len bytes from off, and checks if the read data is erased.
+ *
+ * Returns 1 if erased, 0 if non-erased, and -1 on failure.
+ */
+int flash_area_read_is_empty(const struct flash_area *fa, uint32_t off,
+ void *dst, uint32_t len);
+
+/*
* Given flash area ID, return info about sectors within the area.
*/
int flash_area_get_sectors(int fa_id, uint32_t *count,