arch/blackfin/include/asm/bug.h

   1 /*
   2  * Copyright 2004-2009 Analog Devices Inc.
   3  *
   4  * Licensed under the GPL-2 or later.
   5  */
   6
   7 #ifndef _BLACKFIN_BUG_H
   8 #define _BLACKFIN_BUG_H
   9
  10 #ifdef CONFIG_BUG
  11
  12 /*
  13  * This can be any undefined 16-bit opcode, meaning
  14  * ((opcode & 0xc000) != 0xc000)
  15  * Anything from 0x0001 to 0x000A (inclusive) will work
  16  */
  17 #define BFIN_BUG_OPCODE 0x0001
  18
  19 #ifdef CONFIG_DEBUG_BUGVERBOSE
  20
  21 #define _BUG_OR_WARN(flags)                                             \
  22         asm volatile(                                                   \
  23                 "1:     .hword  %0\n"                                   \
  24                 "       .section __bug_table,\"a\",@progbits\n"         \
  25                 "2:     .long   1b\n"                                   \
  26                 "       .long   %1\n"                                   \
  27                 "       .short  %2\n"                                   \
  28                 "       .short  %3\n"                                   \
  29                 "       .org    2b + %4\n"                              \
  30                 "       .previous"                                      \
  31                 :                                                       \
  32                 : "i"(BFIN_BUG_OPCODE), "i"(__FILE__),                  \
  33                   "i"(__LINE__), "i"(flags),                            \
  34                   "i"(sizeof(struct bug_entry)))
  35
  36 #else
  37
  38 #define _BUG_OR_WARN(flags)                                             \
  39         asm volatile(                                                   \
  40                 "1:     .hword  %0\n"                                   \
  41                 "       .section __bug_table,\"a\",@progbits\n"         \
  42                 "2:     .long   1b\n"                                   \
  43                 "       .short  %1\n"                                   \
  44                 "       .org    2b + %2\n"                              \
  45                 "       .previous"                                      \
  46                 :                                                       \
  47                 : "i"(BFIN_BUG_OPCODE), "i"(flags),                     \
  48                   "i"(sizeof(struct bug_entry)))
  49
  50 #endif /* CONFIG_DEBUG_BUGVERBOSE */
  51
  52 #define BUG()                                                           \
  53         do {                                                            \
  54                 _BUG_OR_WARN(0);                                        \
  55                 unreachable();                                          \
  56         } while (0)
  57
  58 #define WARN_ON(condition)                                                      \
  59         ({                                                              \
  60                 int __ret_warn_on = !!(condition);                      \
  61                 if (unlikely(__ret_warn_on))                            \
  62                         _BUG_OR_WARN(BUGFLAG_WARNING);                  \
  63                 unlikely(__ret_warn_on);                                \
  64         })
  65
  66 #define HAVE_ARCH_BUG
  67 #define HAVE_ARCH_WARN_ON
  68
  69 #endif
  70
  71 #include <asm-generic/bug.h>
  72
  73 #endif