| /* |
| * 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 |
| |
