| /* |
| * arch/arm/include/asm/hardware/debug-8250.S |
| * |
| * Copyright (C) 1994-1999 Russell King |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| */ |
| #include <linux/serial_reg.h> |
| |
| .macro senduart,rd,rx |
| strb \rd, [\rx, #UART_TX << UART_SHIFT] |
| .endm |
| |
| .macro busyuart,rd,rx |
| 1002: ldrb \rd, [\rx, #UART_LSR << UART_SHIFT] |
| and \rd, \rd, #UART_LSR_TEMT | UART_LSR_THRE |
| teq \rd, #UART_LSR_TEMT | UART_LSR_THRE |
| bne 1002b |
| .endm |
| |
| .macro waituart,rd,rx |
| #ifdef FLOW_CONTROL |
| 1001: ldrb \rd, [\rx, #UART_MSR << UART_SHIFT] |
| tst \rd, #UART_MSR_CTS |
| beq 1001b |
| #endif |
| .endm |
