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1da177e4 LT |
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 | */ | |
be509729 | 13 | #include <asm/arch/hardware.h> |
1da177e4 LT |
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 | |
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 |