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-rw-r--r--include/asm-arm/arch-sa1100/debug-macro.S58
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diff --git a/include/asm-arm/arch-sa1100/debug-macro.S b/include/asm-arm/arch-sa1100/debug-macro.S
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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/arch/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