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- /*
- * 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>
- #ifndef UART_SHIFT
- #define UART_SHIFT CONFIG_DEBUG_UART_8250_SHIFT
- #endif
- .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 CONFIG_DEBUG_UART_8250_FLOW_CONTROL
- 1001: ldrb \rd, [\rx, #UART_MSR << UART_SHIFT]
- tst \rd, #UART_MSR_CTS
- beq 1001b
- #endif
- .endm
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