/* | |
* linux/arch/unicore32/kernel/debug.S | |
* | |
* Code specific to PKUnity SoC and UniCore ISA | |
* | |
* Copyright (C) 2001-2010 GUAN Xue-tao | |
* | |
* 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 <linux/linkage.h> | |
#include <asm/assembler.h> | |
.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! | |
*/ | |
#include "debug-macro.S" | |
/* | |
* Useful debugging routines | |
*/ | |
ENTRY(printhex8) | |
mov r1, #8 | |
b printhex | |
ENDPROC(printhex8) | |
ENTRY(printhex4) | |
mov r1, #4 | |
b printhex | |
ENDPROC(printhex4) | |
ENTRY(printhex2) | |
mov r1, #2 | |
printhex: adr r2, hexbuf | |
add r3, r2, r1 | |
mov r1, #0 | |
stb r1, [r3] | |
1: and r1, r0, #15 | |
mov r0, r0 >> #4 | |
csub.a r1, #10 | |
beg 2f | |
add r1, r1, #'0' - 'a' + 10 | |
2: add r1, r1, #'a' - 10 | |
stb.w r1, [r3+], #-1 | |
cxor.a r3, r2 | |
bne 1b | |
mov r0, r2 | |
b printascii | |
ENDPROC(printhex2) | |
.ltorg | |
ENTRY(printascii) | |
addruart r3 | |
b 2f | |
1: waituart r2, r3 | |
senduart r1, r3 | |
busyuart r2, r3 | |
cxor.a r1, #'\n' | |
cmoveq r1, #'\r' | |
beq 1b | |
2: cxor.a r0, #0 | |
beq 3f | |
ldb.w r1, [r0]+, #1 | |
cxor.a r1, #0 | |
bne 1b | |
3: mov pc, lr | |
ENDPROC(printascii) | |
ENTRY(printch) | |
addruart r3 | |
mov r1, r0 | |
mov r0, #0 | |
b 1b | |
ENDPROC(printch) | |
hexbuf: .space 16 | |