47 lines
1.2 KiB
ArmAsm
47 lines
1.2 KiB
ArmAsm
/*
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* arch/arm/mach-at91/include/mach/debug-macro.S
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*
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* Copyright (C) 2003-2005 SAN People
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*
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* Debugging macro include header
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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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#include <mach/hardware.h>
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#include <mach/at91_dbgu.h>
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#if defined(CONFIG_AT91_DEBUG_LL_DBGU0)
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#define AT91_DBGU AT91_BASE_DBGU0
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#elif defined(CONFIG_AT91_DEBUG_LL_DBGU1)
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#define AT91_DBGU AT91_BASE_DBGU1
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#else
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/* On sama5d4, use USART3 as low level serial console */
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#define AT91_DBGU SAMA5D4_BASE_USART3
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#endif
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.macro addruart, rp, rv, tmp
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ldr \rp, =AT91_DBGU @ System peripherals (phys address)
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ldr \rv, =AT91_IO_P2V(AT91_DBGU) @ System peripherals (virt address)
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.endm
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.macro senduart,rd,rx
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strb \rd, [\rx, #(AT91_DBGU_THR)] @ Write to Transmitter Holding Register
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.endm
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.macro waituart,rd,rx
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1001: ldr \rd, [\rx, #(AT91_DBGU_SR)] @ Read Status Register
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tst \rd, #AT91_DBGU_TXRDY @ DBGU_TXRDY = 1 when ready to transmit
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beq 1001b
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.endm
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.macro busyuart,rd,rx
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1001: ldr \rd, [\rx, #(AT91_DBGU_SR)] @ Read Status Register
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tst \rd, #AT91_DBGU_TXEMPTY @ DBGU_TXEMPTY = 1 when transmission complete
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beq 1001b
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.endm
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