1/* 2 * arch/arm/include/asm/hardware/debug-8250.S 3 * 4 * Copyright (C) 1994-1999 Russell King 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 as 8 * published by the Free Software Foundation. 9 */ 10#include <linux/serial_reg.h> 11 12 .macro senduart,rd,rx 13 strb \rd, [\rx, #UART_TX << UART_SHIFT] 14 .endm 15 16 .macro busyuart,rd,rx 171002: ldrb \rd, [\rx, #UART_LSR << UART_SHIFT] 18 and \rd, \rd, #UART_LSR_TEMT | UART_LSR_THRE 19 teq \rd, #UART_LSR_TEMT | UART_LSR_THRE 20 bne 1002b 21 .endm 22 23 .macro waituart,rd,rx 24#ifdef FLOW_CONTROL 251001: ldrb \rd, [\rx, #UART_MSR << UART_SHIFT] 26 tst \rd, #UART_MSR_CTS 27 beq 1001b 28#endif 29 .endm 30