5932ae3f5d
Patch from Deepak Saxena Current IXP4xx debug macros do not work in the small window between the MMU being enabled and the call to map_io() b/c the standard peripheral mapping is not properly setup for use with the low-level debug code. This patch creates a new section-aligned mapping for the UART specifically for use with the debug macros. Signed-off-by: Deepak Saxena Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
36 lines
1.2 KiB
ArmAsm
36 lines
1.2 KiB
ArmAsm
/* linux/include/asm-arm/arch-ixp4xx/debug-macro.S
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*
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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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.macro addruart,rx
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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, #0xc8000000
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orrne \rx, \rx, #0x00b00000
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movne \rx, #0xff000000
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add \rx,\rx,#3 @ Uart regs are at off set of 3 if
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@ byte writes used - Big Endian.
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.endm
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.macro senduart,rd,rx
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strb \rd, [\rx]
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.endm
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.macro waituart,rd,rx
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1002: ldrb \rd, [\rx, #0x14]
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and \rd, \rd, #0x60 @ check THRE and TEMT bits
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teq \rd, #0x60
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bne 1002b
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.endm
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.macro busyuart,rd,rx
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.endm
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