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| /*
| * 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
|
|
