include/asm-sparc64/percpu.h

   1 #ifndef __ARCH_SPARC64_PERCPU__
   2 #define __ARCH_SPARC64_PERCPU__
   3
   4 #include <linux/compiler.h>
   5
   6 register unsigned long __local_per_cpu_offset asm("g5");
   7
   8 #ifdef CONFIG_SMP
   9
  10 #define setup_per_cpu_areas()                   do { } while (0)
  11 extern void real_setup_per_cpu_areas(void);
  12
  13 extern unsigned long __per_cpu_base;
  14 extern unsigned long __per_cpu_shift;
  15 #define __per_cpu_offset(__cpu) \
  16         (__per_cpu_base + ((unsigned long)(__cpu) << __per_cpu_shift))
  17 #define per_cpu_offset(x) (__per_cpu_offset(x))
  18
  19 /* Separate out the type, so (int[3], foo) works. */
  20 #define DEFINE_PER_CPU(type, name) \
  21     __attribute__((__section__(".data.percpu"))) __typeof__(type) per_cpu__##name
  22
  23 #define DEFINE_PER_CPU_SHARED_ALIGNED(type, name)               \
  24     __attribute__((__section__(".data.percpu.shared_aligned"))) \
  25     __typeof__(type) per_cpu__##name                            \
  26     ____cacheline_aligned_in_smp
  27
  28 /* var is in discarded region: offset to particular copy we want */
  29 #define per_cpu(var, cpu) (*RELOC_HIDE(&per_cpu__##var, __per_cpu_offset(cpu)))
  30 #define __get_cpu_var(var) (*RELOC_HIDE(&per_cpu__##var, __local_per_cpu_offset))
  31 #define __raw_get_cpu_var(var) (*RELOC_HIDE(&per_cpu__##var, __local_per_cpu_offset))
  32
  33 /* A macro to avoid #include hell... */
  34 #define percpu_modcopy(pcpudst, src, size)                      \
  35 do {                                                            \
  36         unsigned int __i;                                       \
  37         for_each_possible_cpu(__i)                              \
  38                 memcpy((pcpudst)+__per_cpu_offset(__i),         \
  39                        (src), (size));                          \
  40 } while (0)
  41 #else /* ! SMP */
  42
  43 #define real_setup_per_cpu_areas()              do { } while (0)
  44 #define DEFINE_PER_CPU(type, name) \
  45     __typeof__(type) per_cpu__##name
  46 #define DEFINE_PER_CPU_SHARED_ALIGNED(type, name)       \
  47     DEFINE_PER_CPU(type, name)
  48
  49 #define per_cpu(var, cpu)                       (*((void)cpu, &per_cpu__##var))
  50 #define __get_cpu_var(var)                      per_cpu__##var
  51 #define __raw_get_cpu_var(var)                  per_cpu__##var
  52
  53 #endif  /* SMP */
  54
  55 #define DECLARE_PER_CPU(type, name) extern __typeof__(type) per_cpu__##name
  56
  57 #define EXPORT_PER_CPU_SYMBOL(var) EXPORT_SYMBOL(per_cpu__##var)
  58 #define EXPORT_PER_CPU_SYMBOL_GPL(var) EXPORT_SYMBOL_GPL(per_cpu__##var)
  59
  60 #endif /* __ARCH_SPARC64_PERCPU__ */