mirror of https://gitee.com/openkylin/linux.git
34 lines
732 B
ArmAsm
34 lines
732 B
ArmAsm
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/*
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* Copyright (C) 1994-1999 Russell King
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* Copyright (C) 2008-2009 Telechips
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* Copyright (C) 2009 Hans J. Koch <hjk@linutronix.de>
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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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*/
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.macro addruart,rx,tmp
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mrc p15, 0, \rx, c1, c0
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tst \rx, #1 @ MMU enabled?
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moveq \rx, #0x90000000 @ physical base address
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movne \rx, #0xF1000000 @ virtual base
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orr \rx, \rx, #0x00007000 @ UART0
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.endm
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.macro senduart,rd,rx
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strb \rd, [\rx, #0x44]
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.endm
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.macro waituart,rd,rx
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.endm
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.macro busyuart,rd,rx
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1001:
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ldr \rd, [\rx, #0x14]
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tst \rd, #0x20
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beq 1001b
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.endm
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