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 #ifdef CONFIG_MODULES
   9 # define PERCPU_MODULE_RESERVE 8192
  10 #else
  11 # define PERCPU_MODULE_RESERVE 0
  12 #endif
  13
  14 #define PERCPU_ENOUGH_ROOM \
  15         (ALIGN(__per_cpu_end - __per_cpu_start, SMP_CACHE_BYTES) + \
  16          PERCPU_MODULE_RESERVE)
  17
  18 extern void setup_per_cpu_areas(void);
  19
  20 extern unsigned long __per_cpu_base;
  21 extern unsigned long __per_cpu_shift;
  22 #define __per_cpu_offset(__cpu) \
  23         (__per_cpu_base + ((unsigned long)(__cpu) << __per_cpu_shift))
  24 #define per_cpu_offset(x) (__per_cpu_offset(x))
  25
  26 /* Separate out the type, so (int[3], foo) works. */
  27 #define DEFINE_PER_CPU(type, name) \
  28     __attribute__((__section__(".data.percpu"))) __typeof__(type) per_cpu__##name
  29
  30 register unsigned long __local_per_cpu_offset asm("g5");
  31
  32 /* var is in discarded region: offset to particular copy we want */
  33 #define per_cpu(var, cpu) (*RELOC_HIDE(&per_cpu__##var, __per_cpu_offset(cpu)))
  34 #define __get_cpu_var(var) (*RELOC_HIDE(&per_cpu__##var, __local_per_cpu_offset))
  35 #define __raw_get_cpu_var(var) (*RELOC_HIDE(&per_cpu__##var, __local_per_cpu_offset))
  36
  37 /* A macro to avoid #include hell... */
  38 #define percpu_modcopy(pcpudst, src, size)                      \
  39 do {                                                            \
  40         unsigned int __i;                                       \
  41         for_each_possible_cpu(__i)                              \
  42                 memcpy((pcpudst)+__per_cpu_offset(__i),         \
  43                        (src), (size));                          \
  44 } while (0)
  45 #else /* ! SMP */
  46
  47 #define DEFINE_PER_CPU(type, name) \
  48     __typeof__(type) per_cpu__##name
  49
  50 #define per_cpu(var, cpu)                       (*((void)cpu, &per_cpu__##var))
  51 #define __get_cpu_var(var)                      per_cpu__##var
  52 #define __raw_get_cpu_var(var)                  per_cpu__##var
  53
  54 #endif  /* SMP */
  55
  56 #define DECLARE_PER_CPU(type, name) extern __typeof__(type) per_cpu__##name
  57
  58 #define EXPORT_PER_CPU_SYMBOL(var) EXPORT_SYMBOL(per_cpu__##var)
  59 #define EXPORT_PER_CPU_SYMBOL_GPL(var) EXPORT_SYMBOL_GPL(per_cpu__##var)
  60
  61 #endif /* __ARCH_SPARC64_PERCPU__ */