15 		.macro	store, rd, rx:vararg
16 		str	\rd, \rx
19 		.macro	load, rd, rx:vararg
20 		ldr	\rd, \rx
23 		.macro	store, rd, rx:vararg
24 		strb	\rd, \rx
27 		.macro	load, rd, rx:vararg
28 		ldrb	\rd, \rx
34 		.macro	senduart,rd,rx  argument
35 		store	\rd, [\rx, #UART_TX << UART_SHIFT]
38 		.macro	busyuart,rd,rx  argument
39 1002:		load	\rd, [\rx, #UART_LSR << UART_SHIFT]
45 		.macro	waituart,rd,rx  argument
47 1001:		load	\rd, [\rx, #UART_MSR << UART_SHIFT]