mirror of https://gitee.com/openkylin/linux.git
28 lines
733 B
ArmAsm
28 lines
733 B
ArmAsm
/*
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* Copyright (c) 2011 Picochip Ltd., Jamie Iles
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* Derived from arch/arm/mach-davinci/include/mach/debug-macro.S to use 32-bit
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* accesses to the 8250.
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*/
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#include <linux/serial_reg.h>
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.macro senduart,rd,rx
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str \rd, [\rx, #UART_TX << UART_SHIFT]
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.endm
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.macro busyuart,rd,rx
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1002: ldr \rd, [\rx, #UART_LSR << UART_SHIFT]
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and \rd, \rd, #UART_LSR_TEMT | UART_LSR_THRE
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teq \rd, #UART_LSR_TEMT | UART_LSR_THRE
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bne 1002b
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.endm
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/* The UART's don't have any flow control IO's wired up. */
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.macro waituart,rd,rx
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.endm
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