-extern reg_cache_t* etb_build_reg_cache(etb_t *etb);
-extern int etb_read_reg(reg_t *reg);
-extern int etb_write_reg(reg_t *reg, u32 value);
-extern int etb_read_reg_w_check(reg_t *reg, u8* check_value, u8* check_mask);
-extern int etb_store_reg(reg_t *reg);
-extern int etb_set_reg(reg_t *reg, u32 value);
-extern int etb_set_reg_w_exec(reg_t *reg, u8 *buf);