| GuanXuetao | 28bab05 | 2011-01-15 18:22:19 +0800 | [diff] [blame] | 1 | /* |
| 2 | * linux/arch/unicore32/kernel/debug.S |
| 3 | * |
| 4 | * Code specific to PKUnity SoC and UniCore ISA |
| 5 | * |
| 6 | * Copyright (C) 2001-2010 GUAN Xue-tao |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License version 2 as |
| 10 | * published by the Free Software Foundation. |
| 11 | * |
| 12 | * 32-bit debugging code |
| 13 | */ |
| 14 | #include <linux/linkage.h> |
| 15 | #include <asm/assembler.h> |
| 16 | |
| 17 | .text |
| 18 | |
| 19 | /* |
| 20 | * Some debugging routines (useful if you've got MM problems and |
| 21 | * printk isn't working). For DEBUGGING ONLY!!! Do not leave |
| 22 | * references to these in a production kernel! |
| 23 | */ |
| 24 | #include "debug-macro.S" |
| 25 | |
| 26 | /* |
| 27 | * Useful debugging routines |
| 28 | */ |
| 29 | ENTRY(printhex8) |
| 30 | mov r1, #8 |
| 31 | b printhex |
| 32 | ENDPROC(printhex8) |
| 33 | |
| 34 | ENTRY(printhex4) |
| 35 | mov r1, #4 |
| 36 | b printhex |
| 37 | ENDPROC(printhex4) |
| 38 | |
| 39 | ENTRY(printhex2) |
| 40 | mov r1, #2 |
| 41 | printhex: adr r2, hexbuf |
| 42 | add r3, r2, r1 |
| 43 | mov r1, #0 |
| 44 | stb r1, [r3] |
| 45 | 1: and r1, r0, #15 |
| 46 | mov r0, r0 >> #4 |
| 47 | csub.a r1, #10 |
| 48 | beg 2f |
| 49 | add r1, r1, #'0' - 'a' + 10 |
| 50 | 2: add r1, r1, #'a' - 10 |
| 51 | stb.w r1, [r3+], #-1 |
| 52 | cxor.a r3, r2 |
| 53 | bne 1b |
| 54 | mov r0, r2 |
| 55 | b printascii |
| 56 | ENDPROC(printhex2) |
| 57 | |
| 58 | .ltorg |
| 59 | |
| 60 | ENTRY(printascii) |
| 61 | addruart r3 |
| 62 | b 2f |
| 63 | 1: waituart r2, r3 |
| 64 | senduart r1, r3 |
| 65 | busyuart r2, r3 |
| 66 | cxor.a r1, #'\n' |
| 67 | cmoveq r1, #'\r' |
| 68 | beq 1b |
| 69 | 2: cxor.a r0, #0 |
| 70 | beq 3f |
| 71 | ldb.w r1, [r0]+, #1 |
| 72 | cxor.a r1, #0 |
| 73 | bne 1b |
| 74 | 3: mov pc, lr |
| 75 | ENDPROC(printascii) |
| 76 | |
| 77 | ENTRY(printch) |
| 78 | addruart r3 |
| 79 | mov r1, r0 |
| 80 | mov r0, #0 |
| 81 | b 1b |
| 82 | ENDPROC(printch) |
| 83 | |
| 84 | hexbuf: .space 16 |
| 85 | |