This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / include / asm-powerpc / bug.h

diff --git a/include/asm-powerpc/bug.h b/include/asm-powerpc/bug.h
new file mode 100644 (file)
index 0000000..f44b529
--- /dev/null
+++ b/include/asm-powerpc/bug.h
@@ -0,0 +1,98 @@
+#ifndef _ASM_POWERPC_BUG_H
+#define _ASM_POWERPC_BUG_H
+#ifdef __KERNEL__
+
+#include <asm/asm-compat.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__
+
+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
+
+/*
+ * BUG_ON() and WARN_ON() do their best to cooperate with compile-time
+ * optimisations. However depending on the complexity of the condition
+ * some compiler versions may not produce optimal results.
+ */
+
+#define BUG() do {                                                      \
+       __asm__ __volatile__(                                            \
+               "1:     twi 31,0,0\n"                                    \
+               ".section __bug_table,\"a\"\n"                           \
+               "\t"PPC_LONG"   1b,%0,%1,%2\n"                           \
+               ".previous"                                              \
+               : : "i" (__LINE__), "i" (__FILE__), "i" (__FUNCTION__)); \
+} while (0)
+
+#define BUG_ON(x) do {                                         \
+       if (__builtin_constant_p(x)) {                          \
+               if (x)                                          \
+                       BUG();                                  \
+       } else {                                                \
+               __asm__ __volatile__(                           \
+               "1:     "PPC_TLNEI"     %0,0\n"                 \
+               ".section __bug_table,\"a\"\n"                  \
+               "\t"PPC_LONG"   1b,%1,%2,%3\n"                  \
+               ".previous"                                     \
+               : : "r" ((long)(x)), "i" (__LINE__),            \
+                   "i" (__FILE__), "i" (__FUNCTION__));        \
+       }                                                       \
+} while (0)
+
+#define __WARN() do {                                          \
+       __asm__ __volatile__(                                   \
+               "1:     twi 31,0,0\n"                           \
+               ".section __bug_table,\"a\"\n"                  \
+               "\t"PPC_LONG"   1b,%0,%1,%2\n"                  \
+               ".previous"                                     \
+               : : "i" (__LINE__ + BUG_WARNING_TRAP),          \
+                   "i" (__FILE__), "i" (__FUNCTION__));        \
+} while (0)
+
+#define WARN_ON(x) do {                                                \
+       if (__builtin_constant_p(x)) {                          \
+               if (x)                                          \
+                       __WARN();                               \
+       } else {                                                \
+               __asm__ __volatile__(                           \
+               "1:     "PPC_TLNEI"     %0,0\n"                 \
+               ".section __bug_table,\"a\"\n"                  \
+               "\t"PPC_LONG"   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 /* __KERNEL__ */
+#endif /* _ASM_POWERPC_BUG_H */