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C/C++ Source or Header  |  2006-08-11  |  1.5 KB  |  49 lines
  1. #ifndef __ARCH_SPARC64_PERCPU__
  2. #define __ARCH_SPARC64_PERCPU__
  3.  
  4. #include <linux/compiler.h>
  5.  
  6. #ifdef CONFIG_SMP
  7.  
  8. extern void setup_per_cpu_areas(void);
  9.  
  10. extern unsigned long __per_cpu_base;
  11. extern unsigned long __per_cpu_shift;
  12. #define __per_cpu_offset(__cpu) \
  13.     (__per_cpu_base + ((unsigned long)(__cpu) << __per_cpu_shift))
  14.  
  15. /* Separate out the type, so (int[3], foo) works. */
  16. #define DEFINE_PER_CPU(type, name) \
  17.     __attribute__((__section__(".data.percpu"))) __typeof__(type) per_cpu__##name
  18.  
  19. register unsigned long __local_per_cpu_offset asm("g5");
  20.  
  21. /* var is in discarded region: offset to particular copy we want */
  22. #define per_cpu(var, cpu) (*RELOC_HIDE(&per_cpu__##var, __per_cpu_offset(cpu)))
  23. #define __get_cpu_var(var) (*RELOC_HIDE(&per_cpu__##var, __local_per_cpu_offset))
  24.  
  25. /* A macro to avoid #include hell... */
  26. #define percpu_modcopy(pcpudst, src, size)            \
  27. do {                                \
  28.     unsigned int __i;                    \
  29.     for_each_possible_cpu(__i)                \
  30.         memcpy((pcpudst)+__per_cpu_offset(__i),        \
  31.                (src), (size));                \
  32. } while (0)
  33. #else /* ! SMP */
  34.  
  35. #define DEFINE_PER_CPU(type, name) \
  36.     __typeof__(type) per_cpu__##name
  37.  
  38. #define per_cpu(var, cpu)            (*((void)cpu, &per_cpu__##var))
  39. #define __get_cpu_var(var)            per_cpu__##var
  40.  
  41. #endif    /* SMP */
  42.  
  43. #define DECLARE_PER_CPU(type, name) extern __typeof__(type) per_cpu__##name
  44.  
  45. #define EXPORT_PER_CPU_SYMBOL(var) EXPORT_SYMBOL(per_cpu__##var)
  46. #define EXPORT_PER_CPU_SYMBOL_GPL(var) EXPORT_SYMBOL_GPL(per_cpu__##var)
  47.  
  48. #endif /* __ARCH_SPARC64_PERCPU__ */
  49.