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1 | /* | |
2 | * linux/include/asm-arm/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 | |
17 | 1002: 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 | |
25 | 1001: ldrb \rd, [\rx, #UART_MSR << UART_SHIFT] | |
26 | tst \rd, #UART_MSR_CTS | |
27 | beq 1001b | |
28 | #endif | |
29 | .endm |