1/* linux/include/asm-arm/arch-sa1100/debug-macro.S
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*/
13#include <asm/hardware.h>
14
15		.macro	addruart,rx
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
22		@ the comment in include/asm-arm/arch-sa1100/uncompress.h.
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
491001:		ldr	\rd, [\rx, #UTSR1]
50		tst	\rd, #UTSR1_TNF
51		beq	1001b
52		.endm
53
54		.macro	busyuart,rd,rx
551001:		ldr	\rd, [\rx, #UTSR1]
56		tst	\rd, #UTSR1_TBY
57		bne	1001b
58		.endm
59