[net-next-2.6.git] / arch / arm / mach-sa1100 / include / mach / debug-macro.S

/* arch/arm/mach-sa1100/include/mach/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 <mach/hardware.h>

		.macro	addruart, rx, tmp
		mrc	p15, 0, \rx, c1, c0
		tst	\rx, #1			@ MMU enabled?
		moveq	\rx, #0x80000000	@ physical base address
		movne	\rx, #0xf8000000	@ virtual address

		@ We probe for the active serial port here, coherently with
		@ the comment in arch/arm/mach-sa1100/include/mach/uncompress.h.
		@ We assume r1 can be clobbered.

		@ see if Ser3 is active
		add	\rx, \rx, #0x00050000
		ldr	r1, [\rx, #UTCR3]
		tst	r1, #UTCR3_TXE

		@ if Ser3 is inactive, then try Ser1
		addeq	\rx, \rx, #(0x00010000 - 0x00050000)
		ldreq	r1, [\rx, #UTCR3]
		tsteq	r1, #UTCR3_TXE

		@ if Ser1 is inactive, then try Ser2
		addeq	\rx, \rx, #(0x00030000 - 0x00010000)
		ldreq	r1, [\rx, #UTCR3]
		tsteq	r1, #UTCR3_TXE

		@ if all ports are inactive, then there is nothing we can do
		moveq	pc, lr
		.endm

		.macro	senduart,rd,rx
		str	\rd, [\rx, #UTDR]
		.endm

		.macro	waituart,rd,rx
1001:		ldr	\rd, [\rx, #UTSR1]
		tst	\rd, #UTSR1_TNF
		beq	1001b
		.endm

		.macro	busyuart,rd,rx
1001:		ldr	\rd, [\rx, #UTSR1]
		tst	\rd, #UTSR1_TBY
		bne	1001b
		.endm
Commit	Line	Data
a09e64fb	1	/* arch/arm/mach-sa1100/include/mach/debug-macro.S
1da177e4 LT	2	*
	3	* Debugging macro include header
	4	*
	5	* Copyright (C) 1994-1999 Russell King
	6	* Moved from linux/arch/arm/kernel/debug.S by Ben Dooks
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License version 2 as
	10	* published by the Free Software Foundation.
	11	*
	12	*/
a09e64fb	13	#include <mach/hardware.h>
1da177e4	14
4e6d488a	15	.macro addruart, rx, tmp
1da177e4 LT	16	mrc p15, 0, \rx, c1, c0
	17	tst \rx, #1 @ MMU enabled?
	18	moveq \rx, #0x80000000 @ physical base address
	19	movne \rx, #0xf8000000 @ virtual address
	20
	21	@ We probe for the active serial port here, coherently with
a09e64fb	22	@ the comment in arch/arm/mach-sa1100/include/mach/uncompress.h.
1da177e4 LT	23	@ We assume r1 can be clobbered.
	24
	25	@ see if Ser3 is active
	26	add \rx, \rx, #0x00050000
	27	ldr r1, [\rx, #UTCR3]
	28	tst r1, #UTCR3_TXE
	29
	30	@ if Ser3 is inactive, then try Ser1
	31	addeq \rx, \rx, #(0x00010000 - 0x00050000)
	32	ldreq r1, [\rx, #UTCR3]
	33	tsteq r1, #UTCR3_TXE
	34
	35	@ if Ser1 is inactive, then try Ser2
	36	addeq \rx, \rx, #(0x00030000 - 0x00010000)
	37	ldreq r1, [\rx, #UTCR3]
	38	tsteq r1, #UTCR3_TXE
	39
	40	@ if all ports are inactive, then there is nothing we can do
	41	moveq pc, lr
	42	.endm
	43
	44	.macro senduart,rd,rx
	45	str \rd, [\rx, #UTDR]
	46	.endm
	47
	48	.macro waituart,rd,rx
	49	1001: ldr \rd, [\rx, #UTSR1]
	50	tst \rd, #UTSR1_TNF
	51	beq 1001b
	52	.endm
	53
	54	.macro busyuart,rd,rx
	55	1001: ldr \rd, [\rx, #UTSR1]
	56	tst \rd, #UTSR1_TBY
	57	bne 1001b
	58	.endm