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-rw-r--r--arch/unicore32/kernel/debug.S85
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
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+++ b/arch/unicore32/kernel/debug.S
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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
+
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