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 000000000000..d625ee55f957
--- /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 */