debug-macro.s

来自「linux 内核源代码」· S 代码 · 共 58 行

/* 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

#define UART_SHIFT	0
#define FLOW_CONTROL
#include <asm/hardware/debug-8250.S>

#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