Merge branch 'master'

1 files changed, 77 insertions, 0 deletions

diff --git a/include/asm-powerpc/bug.h b/include/asm-powerpc/bug.h
new file mode 100644
index 00000000000..d625ee55f95
--- /dev/null
+++ b/include/asm-powerpc/bug.h
@@ -0,0 +1,77 @@
+#ifndef _ASM_POWERPC_BUG_H
+#define _ASM_POWERPC_BUG_H
+
+/*
+ * Define an illegal instr to trap on the bug.
+ * We don't use 0 because that marks the end of a function
+ * in the ELF ABI.  That's "Boo Boo" in case you wonder...
+ */
+#define BUG_OPCODE .long 0x00b00b00  /* For asm */
+#define BUG_ILLEGAL_INSTR "0x00b00b00" /* For BUG macro */
+
+#ifndef __ASSEMBLY__
+
+#ifdef __powerpc64__
+#define BUG_TABLE_ENTRY		".llong"
+#define BUG_TRAP_OP		"tdnei"
+#else 
+#define BUG_TABLE_ENTRY		".long"
+#define BUG_TRAP_OP		"twnei"
+#endif /* __powerpc64__ */
+
+struct bug_entry {
+	unsigned long	bug_addr;
+	long		line;
+	const char	*file;
+	const char	*function;
+};
+
+struct bug_entry *find_bug(unsigned long bugaddr);
+
+/*
+ * If this bit is set in the line number it means that the trap
+ * is for WARN_ON rather than BUG or BUG_ON.
+ */
+#define BUG_WARNING_TRAP	0x1000000
+
+#ifdef CONFIG_BUG
+
+#define BUG() do {							 \
+	__asm__ __volatile__(						 \
+		"1:	twi 31,0,0\n"					 \
+		".section __bug_table,\"a\"\n"				 \
+		"\t"BUG_TABLE_ENTRY"	1b,%0,%1,%2\n"			 \
+		".previous"						 \
+		: : "i" (__LINE__), "i" (__FILE__), "i" (__FUNCTION__)); \
+} while (0)
+
+#define BUG_ON(x) do {						\
+	__asm__ __volatile__(					\
+		"1:	"BUG_TRAP_OP"	%0,0\n"			\
+		".section __bug_table,\"a\"\n"			\
+		"\t"BUG_TABLE_ENTRY"	1b,%1,%2,%3\n"		\
+		".previous"					\
+		: : "r" ((long)(x)), "i" (__LINE__),		\
+		    "i" (__FILE__), "i" (__FUNCTION__));	\
+} while (0)
+
+#define WARN_ON(x) do {						\
+	__asm__ __volatile__(					\
+		"1:	"BUG_TRAP_OP"	%0,0\n"			\
+		".section __bug_table,\"a\"\n"			\
+		"\t"BUG_TABLE_ENTRY"	1b,%1,%2,%3\n"		\
+		".previous"					\
+		: : "r" ((long)(x)),				\
+		    "i" (__LINE__ + BUG_WARNING_TRAP),		\
+		    "i" (__FILE__), "i" (__FUNCTION__));	\
+} while (0)
+
+#define HAVE_ARCH_BUG
+#define HAVE_ARCH_BUG_ON
+#define HAVE_ARCH_WARN_ON
+#endif /* CONFIG_BUG */
+#endif /* __ASSEMBLY __ */
+
+#include <asm-generic/bug.h>
+
+#endif /* _ASM_POWERPC_BUG_H */