diff options
Diffstat (limited to 'arch/unicore32/kernel/debug.S')
| -rw-r--r-- | arch/unicore32/kernel/debug.S | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/arch/unicore32/kernel/debug.S b/arch/unicore32/kernel/debug.S new file mode 100644 index 000000000000..029fd12f6ab0 --- /dev/null +++ b/arch/unicore32/kernel/debug.S | |||
| @@ -0,0 +1,85 @@ | |||
| 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 | |||