1/* arch/arm/mach-sa1100/include/mach/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 <mach/hardware.h>
14
15		.macro	addruart, rp, rv, tmp
16		mrc	p15, 0, \rp, c1, c0
17		tst	\rp, #1			@ MMU enabled?
18		moveq	\rp, #0x80000000	@ physical base address
19		movne	\rp, #0xf8000000	@ virtual address
20
21		@ We probe for the active serial port here, coherently with
22		@ the comment in arch/arm/mach-sa1100/include/mach/uncompress.h.
23		@ We assume r1 can be clobbered.
24
25		@ see if Ser3 is active
26		add	\rp, \rp, #0x00050000
27		ldr	\rv, [\rp, #UTCR3]
28		tst	\rv, #UTCR3_TXE
29
30		@ if Ser3 is inactive, then try Ser1
31		addeq	\rp, \rp, #(0x00010000 - 0x00050000)
32		ldreq	\rv, [\rp, #UTCR3]
33		tsteq	\rv, #UTCR3_TXE
34
35		@ if Ser1 is inactive, then try Ser2
36		addeq	\rp, \rp, #(0x00030000 - 0x00010000)
37		ldreq	\rv, [\rp, #UTCR3]
38		tsteq	\rv, #UTCR3_TXE
39
40		@ clear top bits, and generate both phys and virt addresses
41		lsl	\rp, \rp, #8
42		lsr	\rp, \rp, #8
43		orr	\rv, \rp, #0xf8000000	@ virtual
44		orr	\rp, \rp, #0x80000000	@ physical
45
46		.endm
47
48		.macro	senduart,rd,rx
49		str	\rd, [\rx, #UTDR]
50		.endm
51
52		.macro	waituart,rd,rx
531001:		ldr	\rd, [\rx, #UTSR1]
54		tst	\rd, #UTSR1_TNF
55		beq	1001b
56		.endm
57
58		.macro	busyuart,rd,rx
591001:		ldr	\rd, [\rx, #UTSR1]
60		tst	\rd, #UTSR1_TBY
61		bne	1001b
62		.endm
63