[MFD] Add SA11x0 MCP platform device support
[linux-2.6] / include / asm-arm / arch-sa1100 / debug-macro.S
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
14                 .macro  addruart,rx
15                 mrc     p15, 0, \rx, c1, c0
16                 tst     \rx, #1                 @ MMU enabled?
17                 moveq   \rx, #0x80000000        @ physical base address
18                 movne   \rx, #0xf8000000        @ virtual address
19
20                 @ We probe for the active serial port here, coherently with
21                 @ the comment in include/asm-arm/arch-sa1100/uncompress.h.
22                 @ We assume r1 can be clobbered.
23
24                 @ see if Ser3 is active
25                 add     \rx, \rx, #0x00050000
26                 ldr     r1, [\rx, #UTCR3]
27                 tst     r1, #UTCR3_TXE
28
29                 @ if Ser3 is inactive, then try Ser1
30                 addeq   \rx, \rx, #(0x00010000 - 0x00050000)
31                 ldreq   r1, [\rx, #UTCR3]
32                 tsteq   r1, #UTCR3_TXE
33
34                 @ if Ser1 is inactive, then try Ser2
35                 addeq   \rx, \rx, #(0x00030000 - 0x00010000)
36                 ldreq   r1, [\rx, #UTCR3]
37                 tsteq   r1, #UTCR3_TXE
38
39                 @ if all ports are inactive, then there is nothing we can do
40                 moveq   pc, lr
41                 .endm
42
43                 .macro  senduart,rd,rx
44                 str     \rd, [\rx, #UTDR]
45                 .endm
46
47                 .macro  waituart,rd,rx
48 1001:           ldr     \rd, [\rx, #UTSR1]
49                 tst     \rd, #UTSR1_TNF
50                 beq     1001b
51                 .endm
52
53                 .macro  busyuart,rd,rx
54 1001:           ldr     \rd, [\rx, #UTSR1]
55                 tst     \rd, #UTSR1_TBY
56                 bne     1001b
57                 .endm