e23814da82
Use the USART peripheral as UART for low level debug. Only the UA0 port is currently supported. Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Baruch Siach <baruch@tkos.co.il> Signed-off-by: Olof Johansson <olof@lixom.net>
36 lines
756 B
ArmAsm
36 lines
756 B
ArmAsm
/*
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* Debugging macro include header for Conexant Digicolor USART
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*
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* Copyright (C) 2014 Paradox Innovation Ltd.
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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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#define UA0_STATUS 0x0742
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#define UA0_EMI_REC 0x0744
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#define UA0_STATUS_TX_READY 0x40
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#ifdef CONFIG_DEBUG_UART_PHYS
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.macro addruart, rp, rv, tmp
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ldr \rp, =CONFIG_DEBUG_UART_PHYS
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ldr \rv, =CONFIG_DEBUG_UART_VIRT
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.endm
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#endif
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.macro senduart,rd,rx
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strb \rd, [\rx, #UA0_EMI_REC]
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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: ldrb \rd, [\rx, #UA0_STATUS]
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tst \rd, #UA0_STATUS_TX_READY
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beq 1001b
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.endm
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