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e6131fa3 | 1 | /* arch/arm/include/debug/sa1100.S |
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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 | */ | |
e6131fa3 DES |
13 | |
14 | #define UTCR3 0x0c | |
15 | #define UTDR 0x14 | |
16 | #define UTSR1 0x20 | |
17 | #define UTCR3_TXE 0x00000002 /* Transmit Enable */ | |
18 | #define UTSR1_TBY 0x00000001 /* Transmitter BusY (read) */ | |
19 | #define UTSR1_TNF 0x00000004 /* Transmit FIFO Not Full (read) */ | |
1da177e4 | 20 | |
639da5ee | 21 | .macro addruart, rp, rv, tmp |
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22 | mrc p15, 0, \rp, c1, c0 |
23 | tst \rp, #1 @ MMU enabled? | |
24 | moveq \rp, #0x80000000 @ physical base address | |
25 | movne \rp, #0xf8000000 @ virtual address | |
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26 | |
27 | @ We probe for the active serial port here, coherently with | |
a09e64fb | 28 | @ the comment in arch/arm/mach-sa1100/include/mach/uncompress.h. |
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29 | @ We assume r1 can be clobbered. |
30 | ||
31 | @ see if Ser3 is active | |
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32 | add \rp, \rp, #0x00050000 |
33 | ldr \rv, [\rp, #UTCR3] | |
34 | tst \rv, #UTCR3_TXE | |
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35 | |
36 | @ if Ser3 is inactive, then try Ser1 | |
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37 | addeq \rp, \rp, #(0x00010000 - 0x00050000) |
38 | ldreq \rv, [\rp, #UTCR3] | |
39 | tsteq \rv, #UTCR3_TXE | |
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40 | |
41 | @ if Ser1 is inactive, then try Ser2 | |
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42 | addeq \rp, \rp, #(0x00030000 - 0x00010000) |
43 | ldreq \rv, [\rp, #UTCR3] | |
44 | tsteq \rv, #UTCR3_TXE | |
45 | ||
46 | @ clear top bits, and generate both phys and virt addresses | |
47 | lsl \rp, \rp, #8 | |
48 | lsr \rp, \rp, #8 | |
49 | orr \rv, \rp, #0xf8000000 @ virtual | |
50 | orr \rp, \rp, #0x80000000 @ physical | |
1da177e4 | 51 | |
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52 | .endm |
53 | ||
54 | .macro senduart,rd,rx | |
55 | str \rd, [\rx, #UTDR] | |
56 | .endm | |
57 | ||
58 | .macro waituart,rd,rx | |
59 | 1001: ldr \rd, [\rx, #UTSR1] | |
60 | tst \rd, #UTSR1_TNF | |
61 | beq 1001b | |
62 | .endm | |
63 | ||
64 | .macro busyuart,rd,rx | |
65 | 1001: ldr \rd, [\rx, #UTSR1] | |
66 | tst \rd, #UTSR1_TBY | |
67 | bne 1001b | |
68 | .endm |