include/asm-powerpc/bug.h

   1 #ifndef _ASM_POWERPC_BUG_H
   2 #define _ASM_POWERPC_BUG_H
   3
   4 #include <asm/asm-compat.h>
   5 /*
   6  * Define an illegal instr to trap on the bug.
   7  * We don't use 0 because that marks the end of a function
   8  * in the ELF ABI.  That's "Boo Boo" in case you wonder...
   9  */
  10 #define BUG_OPCODE .long 0x00b00b00  /* For asm */
  11 #define BUG_ILLEGAL_INSTR "0x00b00b00" /* For BUG macro */
  12
  13 #ifndef __ASSEMBLY__
  14
  15 struct bug_entry {
  16         unsigned long   bug_addr;
  17         long            line;
  18         const char      *file;
  19         const char      *function;
  20 };
  21
  22 struct bug_entry *find_bug(unsigned long bugaddr);
  23
  24 /*
  25  * If this bit is set in the line number it means that the trap
  26  * is for WARN_ON rather than BUG or BUG_ON.
  27  */
  28 #define BUG_WARNING_TRAP        0x1000000
  29
  30 #ifdef CONFIG_BUG
  31
  32 #define BUG() do {                                                       \
  33         __asm__ __volatile__(                                            \
  34                 "1:     twi 31,0,0\n"                                    \
  35                 ".section __bug_table,\"a\"\n"                           \
  36                 "\t"PPC_LONG"   1b,%0,%1,%2\n"                   \
  37                 ".previous"                                              \
  38                 : : "i" (__LINE__), "i" (__FILE__), "i" (__FUNCTION__)); \
  39 } while (0)
  40
  41 #define BUG_ON(x) do {                                          \
  42         __asm__ __volatile__(                                   \
  43                 "1:     "PPC_TLNEI"     %0,0\n"                 \
  44                 ".section __bug_table,\"a\"\n"                  \
  45                 "\t"PPC_LONG"   1b,%1,%2,%3\n"          \
  46                 ".previous"                                     \
  47                 : : "r" ((long)(x)), "i" (__LINE__),            \
  48                     "i" (__FILE__), "i" (__FUNCTION__));        \
  49 } while (0)
  50
  51 #define WARN_ON(x) do {                                         \
  52         __asm__ __volatile__(                                   \
  53                 "1:     "PPC_TLNEI"     %0,0\n"                 \
  54                 ".section __bug_table,\"a\"\n"                  \
  55                 "\t"PPC_LONG"   1b,%1,%2,%3\n"          \
  56                 ".previous"                                     \
  57                 : : "r" ((long)(x)),                            \
  58                     "i" (__LINE__ + BUG_WARNING_TRAP),          \
  59                     "i" (__FILE__), "i" (__FUNCTION__));        \
  60 } while (0)
  61
  62 #define HAVE_ARCH_BUG
  63 #define HAVE_ARCH_BUG_ON
  64 #define HAVE_ARCH_WARN_ON
  65 #endif /* CONFIG_BUG */
  66 #endif /* __ASSEMBLY __ */
  67
  68 #include <asm-generic/bug.h>
  69
  70 #endif /* _ASM_POWERPC_BUG_H */