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C/C++ Source or Header  |  2006-08-11  |  1.3 KB  |  48 lines
  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
  48.