typedef ao_storage_pos_t ao_pos_t;
/* Total bytes of available storage */
+#ifndef ao_storage_total
extern ao_pos_t ao_storage_total;
+#endif
/* Block size - device is erased in these units. At least 256 bytes */
+#ifndef ao_storage_block
extern ao_pos_t ao_storage_block;
+#endif
#ifndef USE_STORAGE_CONFIG
#define USE_STORAGE_CONFIG 1
#endif
+#ifndef AO_STORAGE_ERASED_BYTE
+#define AO_STORAGE_ERASED_BYTE 0xff
+#endif
+
#if USE_STORAGE_CONFIG
/* Byte offset of config block. Will be ao_storage_block bytes long */
extern ao_pos_t ao_storage_config;
#endif
/* Storage unit size - device reads and writes must be within blocks of this size. Usually 256 bytes. */
+#ifndef ao_storage_unit
extern uint16_t ao_storage_unit;
+#endif
/* Initialize above values. Can only be called once the OS is running */
void
/* Erase a block of storage. This always clears ao_storage_block bytes */
uint8_t
-ao_storage_erase(ao_pos_t pos);
+ao_storage_erase(ao_pos_t pos, uint32_t len);
+
+/* Check storage starting at pos to see if the chunk there
+ * is erased
+ */
+uint8_t
+ao_storage_is_erased(uint32_t pos);
/* Flush any pending writes to stable storage */
void
uint8_t
ao_storage_device_write(ao_pos_t pos, void *buf, uint16_t len);
+/* Erase device from pos through pos + ao_storage_block */
+uint8_t
+ao_storage_device_erase(uint32_t pos);
+
/* Initialize low-level device bits */
void
ao_storage_device_init(void);