target/linux/ubicom32/files/arch/ubicom32/include/asm/bug.h

   1 /*
   2  * arch/ubicom32/include/asm/bug.h
   3  *   Generic bug.h for Ubicom32 architecture.
   4  *
   5  * (C) Copyright 2009, Ubicom, Inc.
   6  *
   7  * This file is part of the Ubicom32 Linux Kernel Port.
   8  *
   9  * The Ubicom32 Linux Kernel Port is free software: you can redistribute
  10  * it and/or modify it under the terms of the GNU General Public License
  11  * as published by the Free Software Foundation, either version 2 of the
  12  * License, or (at your option) any later version.
  13  *
  14  * The Ubicom32 Linux Kernel Port is distributed in the hope that it
  15  * will be useful, but WITHOUT ANY WARRANTY; without even the implied
  16  * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
  17  * the GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with the Ubicom32 Linux Kernel Port.  If not,
  21  * see <http://www.gnu.org/licenses/>.
  22  *
  23  * Ubicom32 implementation derived from (with many thanks):
  24  *   arch/m68knommu
  25  *   arch/blackfin
  26  *   arch/parisc
  27  */
  28 #ifndef _ASM_UBICOM32_BUG_H
  29 #define _ASM_UBICOM32_BUG_H
  30
  31 #include <linux/kernel.h>
  32 #include <asm/thread.h>
  33
  34 #if defined(CONFIG_BUG) && defined(CONFIG_STOP_ON_BUG)
  35
  36 /*
  37  * BUG()
  38  *      Ubicom specific version of the BUG() macro.
  39  *
  40  * This implementation performs a THREAD_STALL stopping all threads before
  41  * calling panic.  This enables a developer to see the "real" state of the
  42  * machine (since panic alters the system state).  We do the printf first
  43  * because while it is slow, it does not alter system state (like
  44  * interrupts).
  45  *
  46  * TODO: Implement the trap sequence used by other architectures.
  47  */
  48 #define BUG() do { \
  49         printk("BUG: failure at %s:%d/%s()!\n", __FILE__, __LINE__, __func__); \
  50         THREAD_STALL; \
  51         panic("BUG!"); \
  52 } while (0)
  53
  54
  55 /*
  56  * __WARN()
  57  *      WARN() using printk() for now.
  58  *
  59  * TODO: Implement the trap sequence used by other architectures.
  60  */
  61 #define __WARN()                                                        \
  62         do {                                                            \
  63                 printk("WARN: failure at %s:%d/%s()!\n", __FILE__, __LINE__, __func__); \
  64         } while(0)
  65
  66 /*
  67  * WARN_ON()
  68  *      Ubicom specific version of the WARN_ON macro.
  69  *
  70  * This implementation performs a printk for the WARN_ON() instead
  71  * of faulting into the kernel and using report_bug().
  72  *
  73  * TODO: Implement the trap sequence used by other architectures.
  74  */
  75 #define WARN_ON(x) ({                                           \
  76         int __ret_warn_on = !!(x);                              \
  77         if (__builtin_constant_p(__ret_warn_on)) {              \
  78                 if (__ret_warn_on)                              \
  79                         __WARN();                               \
  80         } else {                                                \
  81                 if (unlikely(__ret_warn_on))                    \
  82                         __WARN();                               \
  83         }                                                       \
  84         unlikely(__ret_warn_on);                                \
  85 })
  86
  87
  88 #define HAVE_ARCH_BUG
  89 #define HAVE_ARCH_WARN_ON
  90
  91 #endif
  92
  93 #include <asm-generic/bug.h>
  94
  95 #endif /* _ASM_UBICOM32_BUG_H */