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	* other timing related computations.			* other timing related computations.
	*/			*/
	struct uart_bas {			struct uart_bas {
	bus_space_tag_t bst;			bus_space_tag_t bst;
	bus_space_handle_t bsh;			bus_space_handle_t bsh;
	u_int chan;			u_int chan;
	u_int rclk;			u_int rclk;
	u_int regshft;			u_int regshft;
				u_int regiowidth;
				u_int busy_detect;
	};			};

	#define uart_regofs(bas, reg) ((reg) << (bas)->regshft)			#define uart_regofs(bas, reg) ((reg) << (bas)->regshft)
				#define uart_regiowidth(bas) ((bas)->regiowidth)

	#define uart_getreg(bas, reg) \			#define uart_getreg(bas, reg) \
	bus_space_read_1((bas)->bst, (bas)->bsh, uart_regofs(bas, reg))			bus_space_read_1((bas)->bst, (bas)->bsh, uart_regofs(bas, reg))
	#define uart_setreg(bas, reg, value) \			#define uart_setreg(bas, reg, value) \
	bus_space_write_1((bas)->bst, (bas)->bsh, uart_regofs(bas, reg), value)			bus_space_write_1((bas)->bst, (bas)->bsh, uart_regofs(bas, reg), value)

	/*			/*
	* XXX we don't know the length of the bus space address range in use by			* XXX we don't know the length of the bus space address range in use by
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