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 { typecheck(unsigned long, flags); \
  27                                      (flags) = get_signals(); } while(0)
  28 #define local_irq_restore(flags) do { typecheck(unsigned long, flags); \
  29                                       set_signals(flags); } while(0)
  30
  31 #define local_irq_save(flags) do { local_save_flags(flags); \
  32                                    local_irq_disable(); } while(0)
  33
  34 #define local_irq_enable() unblock_signals()
  35 #define local_irq_disable() block_signals()
  36
  37 #define irqs_disabled()                 \
  38 ({                                      \
  39         unsigned long flags;            \
  40         local_save_flags(flags);        \
  41         (flags == 0);                   \
  42 })
  43
  44 extern void *_switch_to(void *prev, void *next, void *last);
  45 #define switch_to(prev, next, last) prev = _switch_to(prev, next, last)
  46
  47 #endif