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Merge up to 2.6.21-rc4
Merge of 2.6.x-xfs-melb:linux:28276b by kenmcd.

/*
 * include/asm-arm/arch-at91/debug-macro.S
 *
 *  Copyright (C) 2003-2005 SAN People
 *
 * Debugging macro include header
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
*/

#include <asm/hardware.h>
#include <asm/arch/at91_dbgu.h>

	.macro	addruart,rx
	mrc	p15, 0, \rx, c1, c0
	tst	\rx, #1						@ MMU enabled?
	ldreq	\rx, =(AT91_BASE_SYS + AT91_DBGU)		@ System peripherals (phys address)
	ldrne	\rx, =(AT91_VA_BASE_SYS	+ AT91_DBGU)		@ System peripherals (virt address)
	.endm

	.macro	senduart,rd,rx
	strb	\rd, [\rx, #(AT91_DBGU_THR - AT91_DBGU)]	@ Write to Transmitter Holding Register
	.endm

	.macro	waituart,rd,rx
1001:	ldr	\rd, [\rx, #(AT91_DBGU_SR - AT91_DBGU)]		@ Read Status Register
	tst	\rd, #AT91_DBGU_TXRDY				@ DBGU_TXRDY = 1 when ready to transmit
	beq	1001b
	.endm

	.macro	busyuart,rd,rx
1001:	ldr	\rd, [\rx, #(AT91_DBGU_SR - AT91_DBGU)]		@ Read Status Register
	tst	\rd, #AT91_DBGU_TXEMPTY				@ DBGU_TXEMPTY = 1 when transmission complete
	beq	1001b
	.endm