2 * linux/arch/arm/kernel/debug.S
4 * Copyright (C) 1994-1999 Russell King
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
10 * 32-bit debugging code
12 #include <linux/linkage.h>
17 * Some debugging routines (useful if you've got MM problems and
18 * printk isn't working). For DEBUGGING ONLY!!! Do not leave
19 * references to these in a production kernel!
22 #if defined(CONFIG_DEBUG_ICEDCC)
23 @@ debug using ARM EmbeddedICE DCC channel
27 .macro senduart, rd, rx
28 mcr p14, 0, \rd, c1, c0, 0
31 .macro busyuart, rd, rx
33 mrc p14, 0, \rx, c0, c0, 0
39 .macro waituart, rd, rx
44 mrc p14, 0, \rx, c0, c0, 0
50 #include <asm/arch/debug-macro.S>
54 * Useful debugging routines
66 printhex: adr r2, hexbuf
74 addge r1, r1, #'a' - 10