include/asm-sparc64/percpu.h

   1 #ifndef __ARCH_SPARC64_PERCPU__
   2 #define __ARCH_SPARC64_PERCPU__
   3
   4 #include <linux/compiler.h>
   5
   6 #ifdef CONFIG_SMP
   7
   8 #define setup_per_cpu_areas()                   do { } while (0)
   9 extern void real_setup_per_cpu_areas(void);
  10
  11 extern unsigned long __per_cpu_base;
  12 extern unsigned long __per_cpu_shift;
  13 #define __per_cpu_offset(__cpu) \
  14         (__per_cpu_base + ((unsigned long)(__cpu) << __per_cpu_shift))
  15 #define per_cpu_offset(x) (__per_cpu_offset(x))
  16
  17 /* Separate out the type, so (int[3], foo) works. */
  18 #define DEFINE_PER_CPU(type, name) \
  19     __attribute__((__section__(".data.percpu"))) __typeof__(type) per_cpu__##name
  20
  21 register unsigned long __local_per_cpu_offset asm("g5");
  22
  23 /* var is in discarded region: offset to particular copy we want */
  24 #define per_cpu(var, cpu) (*RELOC_HIDE(&per_cpu__##var, __per_cpu_offset(cpu)))
  25 #define __get_cpu_var(var) (*RELOC_HIDE(&per_cpu__##var, __local_per_cpu_offset))
  26 #define __raw_get_cpu_var(var) (*RELOC_HIDE(&per_cpu__##var, __local_per_cpu_offset))
  27
  28 /* A macro to avoid #include hell... */
  29 #define percpu_modcopy(pcpudst, src, size)                      \
  30 do {                                                            \
  31         unsigned int __i;                                       \
  32         for_each_possible_cpu(__i)                              \
  33                 memcpy((pcpudst)+__per_cpu_offset(__i),         \
  34                        (src), (size));                          \
  35 } while (0)
  36 #else /* ! SMP */
  37
  38 #define real_setup_per_cpu_areas()              do { } while (0)
  39 #define DEFINE_PER_CPU(type, name) \
  40     __typeof__(type) per_cpu__##name
  41
  42 #define per_cpu(var, cpu)                       (*((void)cpu, &per_cpu__##var))
  43 #define __get_cpu_var(var)                      per_cpu__##var
  44 #define __raw_get_cpu_var(var)                  per_cpu__##var
  45
  46 #endif  /* SMP */
  47
  48 #define DECLARE_PER_CPU(type, name) extern __typeof__(type) per_cpu__##name
  49
  50 #define EXPORT_PER_CPU_SYMBOL(var) EXPORT_SYMBOL(per_cpu__##var)
  51 #define EXPORT_PER_CPU_SYMBOL_GPL(var) EXPORT_SYMBOL_GPL(per_cpu__##var)
  52
  53 #endif /* __ARCH_SPARC64_PERCPU__ */