| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* linux/include/asm-arm/arch-lh7a40x/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 | @ It is not known if this will be appropriate for every 40x |
| 15 | @ board. |
| 16 | |
| 17 | .macro addruart,rx |
| 18 | mrc p15, 0, \rx, c1, c0 |
| 19 | tst \rx, #1 @ MMU enabled? |
| 20 | mov \rx, #0x00000700 @ offset from base |
| 21 | orreq \rx, \rx, #0x80000000 @ physical base |
| 22 | orrne \rx, \rx, #0xf8000000 @ virtual base |
| 23 | .endm |
| 24 | |
| 25 | .macro senduart,rd,rx |
| 26 | strb \rd, [\rx] @ DATA |
| 27 | .endm |
| 28 | |
| 29 | .macro busyuart,rd,rx @ spin while busy |
| 30 | 1001: ldr \rd, [\rx, #0x10] @ STATUS |
| 31 | tst \rd, #1 << 3 @ BUSY (TX FIFO not empty) |
| 32 | bne 1001b @ yes, spin |
| 33 | .endm |
| 34 | |
| 35 | .macro waituart,rd,rx @ wait for Tx FIFO room |
| 36 | 1001: ldrb \rd, [\rx, #0x10] @ STATUS |
| 37 | tst \rd, #1 << 5 @ TXFF (TX FIFO full) |
| 38 | bne 1001b @ yes, spin |
| 39 | .endm |