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 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 (__i = 0; __i < NR_CPUS; __i++)                     \
  30                 if (cpu_possible(__i))                          \
  31                         memcpy((pcpudst)+__per_cpu_offset(__i), \
  32                                (src), (size));                  \
  33 } while (0)
  34 #else /* ! SMP */
  35
  36 #define DEFINE_PER_CPU(type, name) \
  37     __typeof__(type) per_cpu__##name
  38
  39 #define per_cpu(var, cpu)                       (*((void)cpu, &per_cpu__##var))
  40 #define __get_cpu_var(var)                      per_cpu__##var
  41
  42 #endif  /* SMP */
  43
  44 #define DECLARE_PER_CPU(type, name) extern __typeof__(type) per_cpu__##name
  45
  46 #define EXPORT_PER_CPU_SYMBOL(var) EXPORT_SYMBOL(per_cpu__##var)
  47 #define EXPORT_PER_CPU_SYMBOL_GPL(var) EXPORT_SYMBOL_GPL(per_cpu__##var)
  48
  49 #endif /* __ARCH_SPARC64_PERCPU__ */