debug-macro.s

来自「linux 内核源代码」· S 代码 · 共 39 行

/*
 * include/asm-arm/arch-ks8695/debug-macro.S
 *
 * Copyright (C) 2006 Ben Dooks <[e-mail]>
 * Copyright (C) 2006 Simtec Electronics
 *
 * KS8695 - Debug macros
 *
 * 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/regs-uart.h>

	.macro	addruart, rx
		mrc	p15, 0, \rx, c1, c0
		tst	\rx, #1				@ MMU enabled?
		ldreq	\rx, =KS8695_UART_PA		@ physical base address
		ldrne	\rx, =KS8695_UART_VA		@ virtual base address
	.endm

	.macro	senduart, rd, rx
		str	\rd, [\rx, #KS8695_URTH]	@ Write to Transmit Holding Register
	.endm

	.macro	busyuart, rd, rx
1001:		ldr	\rd, [\rx, #KS8695_URLS]	@ Read Line Status Register
		tst	\rd, #URLS_URTE			@ Holding & Shift registers empty?
		beq	1001b
	.endm

	.macro	waituart, rd, rx
1001:		ldr	\rd, [\rx, #KS8695_URLS]	@ Read Line Status Register
		tst	\rd, #URLS_URTHRE		@ Holding Register empty?
		beq	1001b
	.endm