| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 |