16 		.macro	store, rd, rx:vararg
17 		str	\rd, \rx
20 		.macro	load, rd, rx:vararg
21 		ldr	\rd, \rx
24 		.macro	store, rd, rx:vararg
25 		strb	\rd, \rx
28 		.macro	load, rd, rx:vararg
29 		ldrb	\rd, \rx
35 		.macro	senduart,rd,rx  argument
36 		store	\rd, [\rx, #UART_TX << UART_SHIFT]
39 		.macro	busyuart,rd,rx  argument
40 1002:		load	\rd, [\rx, #UART_LSR << UART_SHIFT]
46 		.macro	waituart,rd,rx  argument
48 1001:		load	\rd, [\rx, #UART_MSR << UART_SHIFT]