include/asm-um/system-generic.h

   1 #ifndef __UM_SYSTEM_GENERIC_H
   2 #define __UM_SYSTEM_GENERIC_H
   3
   4 #include "asm/arch/system.h"
   5
   6 #undef switch_to
   7 #undef local_irq_save
   8 #undef local_irq_restore
   9 #undef local_irq_disable
  10 #undef local_irq_enable
  11 #undef local_save_flags
  12 #undef local_irq_restore
  13 #undef local_irq_enable
  14 #undef local_irq_disable
  15 #undef local_irq_save
  16 #undef irqs_disabled
  17
  18 extern void *switch_to(void *prev, void *next, void *last);
  19
  20 extern int get_signals(void);
  21 extern int set_signals(int enable);
  22 extern int get_signals(void);
  23 extern void block_signals(void);
  24 extern void unblock_signals(void);
  25
  26 #define local_save_flags(flags) do { (flags) = get_signals(); } while(0)
  27 #define local_irq_restore(flags) do { set_signals(flags); } while(0)
  28
  29 #define local_irq_save(flags) do { local_save_flags(flags); \
  30                                    local_irq_disable(); } while(0)
  31
  32 #define local_irq_enable() unblock_signals()
  33 #define local_irq_disable() block_signals()
  34
  35 #define irqs_disabled()                 \
  36 ({                                      \
  37         unsigned long flags;            \
  38         local_save_flags(flags);        \
  39         (flags == 0);                   \
  40 })
  41
  42 #endif