+
−#include "../include/config.h"
+
−#include "ns16550.h"
+
−
+
−/* this module implements the elementary serial I/O operations */
+
−
+
−	.text
+
−	.code	32
+
−	.globl	lldbg_serial_out
+
−lldbg_serial_out:
+
−	ldr	r2, =CONFIG_LLDBG_UART_BASE
+
−1:	ldrb	r3, [r2, #NS16550_LSR]
+
−	tst	r3, #NS16550_LSR_THRE
+
−	beq	1b
+
−	strb	r0, [r2, #NS16550_THR]
+
−	bx	lr
+
−
+
−	.globl	lldbg_serial_in_poll
+
−lldbg_serial_in_poll:
+
−	ldr	r2, =CONFIG_LLDBG_UART_BASE
+
−	ldrb	r3, [r2, #NS16550_LSR]
+
−	tst	r3, #NS16550_LSR_DR
+
−	ldrneb	r0, [r2, #NS16550_RBR]
+
−	mvneq	r0, #0
+
−	bx	lr
+
−
+
−#if 0	// not needed currently
+
−	.globl	lldbg_serial_flush
+
−lldbg_serial_flush:
+
−	ldr	r2, =CONFIG_LLDBG_UART_BASE
+
−1:	ldrb	r3, [r2, #NS16550_LSR]
+
−	tst	r3, #NS16550_LSR_TEMP
+
−	beq	1b
+
−	bx	lr
+
−#endif