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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* linux/arch/unicore32/kernel/debug.S
*
* Code specific to PKUnity SoC and UniCore ISA
*
* Copyright (C) 2001-2010 GUAN Xue-tao
*
* 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
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