cudbg_read_flash
rc = cudbg_read_flash(handle, (void *)data,
rc = cudbg_read_flash(handle, buf, total_hdr_size, 0);
rc = cudbg_read_flash(handle, payload, payload_size, 1);
int cudbg_read_flash(void *handle, void *data, u32 size, int data_flag);