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debug-macro.S：源码内容

							/* linux/include/asm-arm/arch-ebsa285/debug-macro.S
 *
 * Debugging macro include header
 *
 *  Copyright (C) 1994-1999 Russell King
 *  Moved from linux/arch/arm/kernel/debug.S by Ben Dooks
 *
 * 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/dec21285.h>
#ifndef CONFIG_DEBUG_DC21285_PORT
	/* For NetWinder debugging */
		.macro	addruart,rx
		mrc	p15, 0, rx, c1, c0
		tst	rx, #1			@ MMU enabled?
		moveq	rx, #0x7c000000	@ physical
		movne	rx, #0xff000000	@ virtual
		orr	rx, rx, #0x000003f8
		.endm
		.macro	senduart,rd,rx
		strb	rd, [rx]
		.endm
		.macro	busyuart,rd,rx
1002:		ldrb	rd, [rx, #0x5]
		and	rd, rd, #0x60
		teq	rd, #0x60
		bne	1002b
		.endm
		.macro	waituart,rd,rx
1001:		ldrb	rd, [rx, #0x6]
		tst	rd, #0x10
		beq	1001b
		.endm
#else
	/* For EBSA285 debugging */
		.equ	dc21285_high, ARMCSR_BASE & 0xff000000
		.equ	dc21285_low,  ARMCSR_BASE & 0x00ffffff
		.macro	addruart,rx
		mrc	p15, 0, rx, c1, c0
		tst	rx, #1			@ MMU enabled?
		moveq	rx, #0x42000000
		movne	rx, #dc21285_high
		.if	dc21285_low
		orrne	rx, rx, #dc21285_low
		.endif
		.endm
		.macro	senduart,rd,rx
		str	rd, [rx, #0x160]	@ UARTDR
		.endm
		.macro	busyuart,rd,rx
1001:		ldr	rd, [rx, #0x178]	@ UARTFLG
		tst	rd, #1 << 3
		bne	1001b
		.endm
		.macro	waituart,rd,rx
		.endm
#endif

						