arch/parisc/include/asm/bug.h

   1 #ifndef _PARISC_BUG_H
   2 #define _PARISC_BUG_H
   3
   4 #include <linux/kernel.h>       /* for BUGFLAG_TAINT */
   5
   6 /*
   7  * Tell the user there is some problem.
   8  * The offending file and line are encoded in the __bug_table section.
   9  */
  10
  11 #ifdef CONFIG_BUG
  12 #define HAVE_ARCH_BUG
  13 #define HAVE_ARCH_WARN_ON
  14
  15 /* the break instruction is used as BUG() marker.  */
  16 #define PARISC_BUG_BREAK_ASM    "break 0x1f, 0x1fff"
  17 #define PARISC_BUG_BREAK_INSN   0x03ffe01f  /* PARISC_BUG_BREAK_ASM */
  18
  19 #if defined(CONFIG_64BIT)
  20 #define ASM_WORD_INSN           ".dword\t"
  21 #else
  22 #define ASM_WORD_INSN           ".word\t"
  23 #endif
  24
  25 #ifdef CONFIG_DEBUG_BUGVERBOSE
  26 #define BUG()                                                           \
  27         do {                                                            \
  28                 asm volatile("\n"                                       \
  29                              "1:\t" PARISC_BUG_BREAK_ASM "\n"           \
  30                              "\t.pushsection __bug_table,\"aw\"\n"      \
  31                              "2:\t" ASM_WORD_INSN "1b, %c0\n"           \
  32                              "\t.short %c1, %c2\n"                      \
  33                              "\t.org 2b+%c3\n"                          \
  34                              "\t.popsection"                            \
  35                              : : "i" (__FILE__), "i" (__LINE__),        \
  36                              "i" (0), "i" (sizeof(struct bug_entry)) ); \
  37                 unreachable();                                          \
  38         } while(0)
  39
  40 #else
  41 #define BUG()                                                           \
  42         do {                                                            \
  43                 asm volatile(PARISC_BUG_BREAK_ASM : : );                \
  44                 unreachable();                                          \
  45         } while(0)
  46 #endif
  47
  48 #ifdef CONFIG_DEBUG_BUGVERBOSE
  49 #define __WARN_FLAGS(flags)                                             \
  50         do {                                                            \
  51                 asm volatile("\n"                                       \
  52                              "1:\t" PARISC_BUG_BREAK_ASM "\n"           \
  53                              "\t.pushsection __bug_table,\"aw\"\n"      \
  54                              "2:\t" ASM_WORD_INSN "1b, %c0\n"           \
  55                              "\t.short %c1, %c2\n"                      \
  56                              "\t.org 2b+%c3\n"                          \
  57                              "\t.popsection"                            \
  58                              : : "i" (__FILE__), "i" (__LINE__),        \
  59                              "i" (BUGFLAG_WARNING|(flags)),             \
  60                              "i" (sizeof(struct bug_entry)) );          \
  61         } while(0)
  62 #else
  63 #define __WARN_FLAGS(flags)                                             \
  64         do {                                                            \
  65                 asm volatile("\n"                                       \
  66                              "1:\t" PARISC_BUG_BREAK_ASM "\n"           \
  67                              "\t.pushsection __bug_table,\"aw\"\n"      \
  68                              "2:\t" ASM_WORD_INSN "1b\n"                \
  69                              "\t.short %c0\n"                           \
  70                              "\t.org 2b+%c1\n"                          \
  71                              "\t.popsection"                            \
  72                              : : "i" (BUGFLAG_WARNING|(flags)),         \
  73                              "i" (sizeof(struct bug_entry)) );          \
  74         } while(0)
  75 #endif
  76
  77
  78 #define WARN_ON(x) ({                                           \
  79         int __ret_warn_on = !!(x);                              \
  80         if (__builtin_constant_p(__ret_warn_on)) {              \
  81                 if (__ret_warn_on)                              \
  82                         __WARN();                               \
  83         } else {                                                \
  84                 if (unlikely(__ret_warn_on))                    \
  85                         __WARN();                               \
  86         }                                                       \
  87         unlikely(__ret_warn_on);                                \
  88 })
  89
  90 #endif
  91
  92 #include <asm-generic/bug.h>
  93 #endif
  94