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-rw-r--r--include/asm-powerpc/bug.h77
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 */