From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! --- arch/arm/kernel/debug.S | 106 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 106 insertions(+) create mode 100644 arch/arm/kernel/debug.S (limited to 'arch/arm/kernel/debug.S') diff --git a/arch/arm/kernel/debug.S b/arch/arm/kernel/debug.S new file mode 100644 index 00000000000..caaa919ab47 --- /dev/null +++ b/arch/arm/kernel/debug.S @@ -0,0 +1,106 @@ +/* + * linux/arch/arm/kernel/debug.S + * + * Copyright (C) 1994-1999 Russell King + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * 32-bit debugging code + */ +#include +#include +#include + + .text + +/* + * Some debugging routines (useful if you've got MM problems and + * printk isn't working). For DEBUGGING ONLY!!! Do not leave + * references to these in a production kernel! + */ + +#if defined(CONFIG_DEBUG_ICEDCC) + @@ debug using ARM EmbeddedICE DCC channel + .macro addruart, rx + .endm + + .macro senduart, rd, rx + mcr p14, 0, \rd, c1, c0, 0 + .endm + + .macro busyuart, rd, rx +1001: + mrc p14, 0, \rx, c0, c0, 0 + tst \rx, #2 + beq 1001b + + .endm + + .macro waituart, rd, rx + mov \rd, #0x2000000 +1001: + subs \rd, \rd, #1 + bmi 1002f + mrc p14, 0, \rx, c0, c0, 0 + tst \rx, #2 + bne 1001b +1002: + .endm +#else +#include +#endif + +/* + * Useful debugging routines + */ +ENTRY(printhex8) + mov r1, #8 + b printhex + +ENTRY(printhex4) + mov r1, #4 + b printhex + +ENTRY(printhex2) + mov r1, #2 +printhex: adr r2, hexbuf + add r3, r2, r1 + mov r1, #0 + strb r1, [r3] +1: and r1, r0, #15 + mov r0, r0, lsr #4 + cmp r1, #10 + addlt r1, r1, #'0' + addge r1, r1, #'a' - 10 + strb r1, [r3, #-1]! + teq r3, r2 + bne 1b + mov r0, r2 + b printascii + + .ltorg + +ENTRY(printascii) + addruart r3 + b 2f +1: waituart r2, r3 + senduart r1, r3 + busyuart r2, r3 + teq r1, #'\n' + moveq r1, #'\r' + beq 1b +2: teq r0, #0 + ldrneb r1, [r0], #1 + teqne r1, #0 + bne 1b + mov pc, lr + +ENTRY(printch) + addruart r3 + mov r1, r0 + mov r0, #0 + b 1b + +hexbuf: .space 16 -- cgit v1.2.3