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   1 #ifndef _ASM_POWERPC_BUG_H
   2 #define _ASM_POWERPC_BUG_H
   3
   4 /*
   5  * Define an illegal instr to trap on the bug.
   6  * We don't use 0 because that marks the end of a function
   7  * in the ELF ABI.  That's "Boo Boo" in case you wonder...
   8  */
   9 #define BUG_OPCODE .long 0x00b00b00  /* For asm */
  10 #define BUG_ILLEGAL_INSTR "0x00b00b00" /* For BUG macro */
  11
  12 #ifndef __ASSEMBLY__
  13
  14 #ifdef __powerpc64__
  15 #define BUG_TABLE_ENTRY(label, line, file, func) \
  16         ".llong " #label ", " #line ", " #file ", " #func "\n"
  17 #define TRAP_OP(ra, rb) "1: tdnei " #ra ", " #rb "\n"
  18 #else
  19 #define BUG_TABLE_ENTRY(label, line, file, func) \
  20         ".long " #label ", " #line ", " #file ", " #func "\n"
  21 #define TRAP_OP(ra, rb) "1: twnei " #ra ", " #rb "\n"
  22 #endif /* __powerpc64__ */
  23
  24 struct bug_entry {
  25         unsigned long   bug_addr;
  26         long            line;
  27         const char      *file;
  28         const char      *function;
  29 };
  30
  31 struct bug_entry *find_bug(unsigned long bugaddr);
  32
  33 /*
  34  * If this bit is set in the line number it means that the trap
  35  * is for WARN_ON rather than BUG or BUG_ON.
  36  */
  37 #define BUG_WARNING_TRAP        0x1000000
  38
  39 #ifdef CONFIG_BUG
  40
  41 #define BUG() do {                                                       \
  42         __asm__ __volatile__(                                            \
  43                 "1:     twi 31,0,0\n"                                    \
  44                 ".section __bug_table,\"a\"\n\t"                         \
  45                 BUG_TABLE_ENTRY(1b,%0,%1,%2)                             \
  46                 ".previous"                                              \
  47                 : : "i" (__LINE__), "i" (__FILE__), "i" (__FUNCTION__)); \
  48 } while (0)
  49
  50 #define BUG_ON(x) do {                                          \
  51         __asm__ __volatile__(                                   \
  52                 TRAP_OP(%0,0)                                   \
  53                 ".section __bug_table,\"a\"\n\t"                \
  54                 BUG_TABLE_ENTRY(1b,%1,%2,%3)                    \
  55                 ".previous"                                     \
  56                 : : "r" ((long)(x)), "i" (__LINE__),            \
  57                     "i" (__FILE__), "i" (__FUNCTION__));        \
  58 } while (0)
  59
  60 #define WARN_ON(x) do {                                         \
  61         __asm__ __volatile__(                                   \
  62                 TRAP_OP(%0,0)                                   \
  63                 ".section __bug_table,\"a\"\n\t"                \
  64                 BUG_TABLE_ENTRY(1b,%1,%2,%3)                    \
  65                 ".previous"                                     \
  66                 : : "r" ((long)(x)),                            \
  67                     "i" (__LINE__ + BUG_WARNING_TRAP),          \
  68                     "i" (__FILE__), "i" (__FUNCTION__));        \
  69 } while (0)
  70
  71 #define HAVE_ARCH_BUG
  72 #define HAVE_ARCH_BUG_ON
  73 #define HAVE_ARCH_WARN_ON
  74 #endif /* CONFIG_BUG */
  75 #endif /* __ASSEMBLY __ */
  76
  77 #include <asm-generic/bug.h>
  78
  79 #endif /* _ASM_POWERPC_BUG_H */