percpu.h 1.6 KB

1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950
  1. #ifndef __ARCH_SPARC64_PERCPU__
  2. #define __ARCH_SPARC64_PERCPU__
  3. #include <linux/compiler.h>
  4. #ifdef CONFIG_SMP
  5. extern void setup_per_cpu_areas(void);
  6. extern unsigned long __per_cpu_base;
  7. extern unsigned long __per_cpu_shift;
  8. #define __per_cpu_offset(__cpu) \
  9. (__per_cpu_base + ((unsigned long)(__cpu) << __per_cpu_shift))
  10. /* Separate out the type, so (int[3], foo) works. */
  11. #define DEFINE_PER_CPU(type, name) \
  12. __attribute__((__section__(".data.percpu"))) __typeof__(type) per_cpu__##name
  13. register unsigned long __local_per_cpu_offset asm("g5");
  14. /* var is in discarded region: offset to particular copy we want */
  15. #define per_cpu(var, cpu) (*RELOC_HIDE(&per_cpu__##var, __per_cpu_offset(cpu)))
  16. #define __get_cpu_var(var) (*RELOC_HIDE(&per_cpu__##var, __local_per_cpu_offset))
  17. #define __raw_get_cpu_var(var) (*RELOC_HIDE(&per_cpu__##var, __local_per_cpu_offset))
  18. /* A macro to avoid #include hell... */
  19. #define percpu_modcopy(pcpudst, src, size) \
  20. do { \
  21. unsigned int __i; \
  22. for_each_possible_cpu(__i) \
  23. memcpy((pcpudst)+__per_cpu_offset(__i), \
  24. (src), (size)); \
  25. } while (0)
  26. #else /* ! SMP */
  27. #define DEFINE_PER_CPU(type, name) \
  28. __typeof__(type) per_cpu__##name
  29. #define per_cpu(var, cpu) (*((void)cpu, &per_cpu__##var))
  30. #define __get_cpu_var(var) per_cpu__##var
  31. #define __raw_get_cpu_var(var) per_cpu__##var
  32. #endif /* SMP */
  33. #define DECLARE_PER_CPU(type, name) extern __typeof__(type) per_cpu__##name
  34. #define EXPORT_PER_CPU_SYMBOL(var) EXPORT_SYMBOL(per_cpu__##var)
  35. #define EXPORT_PER_CPU_SYMBOL_GPL(var) EXPORT_SYMBOL_GPL(per_cpu__##var)
  36. #endif /* __ARCH_SPARC64_PERCPU__ */