forked from mirrors/linux
4d31e66412
As part of the migration we introduce DEBUG_UART_PHYS/DEBUG_UART_VIRT which default to UART1 but allow a user to configure UART2 or UART3. We also introduce symbolic names for the registers and flags. Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org> Acked-by: Arnd Bergmann <arnd.bergmann@linaro.org> Cc: linux-arm-kernel@lists.infradead.org Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
36 lines
795 B
ArmAsm
36 lines
795 B
ArmAsm
/*
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* Debugging macro include header
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*
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* Copyright (C) 1994-1999 Russell King
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* Moved from linux/arch/arm/kernel/debug.S by Ben Dooks
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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 UART_DATA 0
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#define UART_FLAG 0x18
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#define UART_FLAG_BUSY (1 << 3)
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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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.macro senduart,rd,rx
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str \rd, [\rx, #UART_DATA]
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.endm
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.macro busyuart,rd,rx
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1002: ldr \rd, [\rx, #UART_FLAG]
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tst \rd, #UART_FLAG_BUSY
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bne 1002b
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.endm
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.macro waituart,rd,rx
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1001: ldr \rd, [\rx, #UART_FLAG]
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tst \rd, #UART_FLAG_BUSY
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bne 1001b
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.endm
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