arch/arch-sparc64.h

   1 #ifndef ARCH_SPARC64_H
   2 #define ARCH_SPARC64_H
   3
   4 #define ARCH    (arch_sparc64)
   5
   6 #ifndef __NR_ioprio_set
   7 #define __NR_ioprio_set         196
   8 #define __NR_ioprio_get         218
   9 #endif
  10
  11 #ifndef __NR_fadvise64
  12 #define __NR_fadvise64          209
  13 #endif
  14
  15 #ifndef __NR_sys_splice
  16 #define __NR_sys_splice         232
  17 #define __NR_sys_tee            280
  18 #define __NR_sys_vmsplice       25
  19 #endif
  20
  21 #define nop     do { } while (0)
  22
  23 #define membar_safe(type) \
  24         do {    __asm__ __volatile__("ba,pt     %%xcc, 1f\n\t" \
  25                                         " membar   " type "\n" \
  26                                         "1:\n" \
  27                                         : : : "memory"); \
  28         } while (0)
  29
  30 #define read_barrier()          membar_safe("#LoadLoad")
  31 #define write_barrier()         membar_safe("#StoreStore")
  32
  33 typedef struct {
  34         volatile unsigned char lock;
  35 } spinlock_t;
  36
  37 static inline void spin_lock(spinlock_t *lock)
  38 {
  39         unsigned long tmp;
  40
  41         __asm__ __volatile__(
  42                 "1:     ldstub          [%1], %0\n"
  43                 "       membar          #StoreLoad | #StoreStore\n"
  44                 "       brnz,pn         %0, 2f\n"
  45                 "        nop\n"
  46                 "       .subsection     2\n"
  47                 "2:     ldub            [%1], %0\n"
  48                 "       membar          #LoadLoad\n"
  49                 "       brnz,pt         %0, 2b\n"
  50                 "        nop\n"
  51                 "       ba,a,pt         %%xcc, 1b\n"
  52                 "       .previous"
  53                 : "=&r" (tmp)
  54                 : "r" (lock)
  55                 : "memory");
  56 }
  57
  58 static inline void spin_unlock(spinlock_t *lock)
  59 {
  60         __asm__ __volatile__(
  61                 "       membar          #StoreStore | #LoadStore\n"
  62                 "       stb             %%g0, [%0]"
  63                 : /* No outputs */
  64                 : "r" (lock)
  65                 : "memory");
  66 }
  67
  68 #endif