arch/arch-sh.h

   1 /* Renesas SH (32bit) only */
   2
   3 #ifndef ARCH_SH_H
   4 #define ARCH_SH_H
   5
   6 #define ARCH    (arch_sh)
   7
   8 #ifndef __NR_ioprio_set
   9 #define __NR_ioprio_set 288
  10 #define __NR_ioprio_get 289
  11 #endif
  12
  13 #ifndef __NR_fadvise64
  14 #define __NR_fadvise64  250
  15 #endif
  16
  17 #ifndef __NR_sys_splice
  18 #define __NR_sys_splice         313
  19 #define __NR_sys_tee            315
  20 #define __NR_sys_vmsplice       316
  21 #endif
  22
  23 #define nop             __asm__ __volatile__ ("nop": : :"memory")
  24
  25 #define mb()                                                            \
  26         do {                                                            \
  27                 if (arch_flags & ARCH_FLAG_1)                           \
  28                         __asm__ __volatile__ ("synco": : :"memory");    \
  29                 else                                                    \
  30                         __asm__ __volatile__ (" " : : : "memory");      \
  31         } while (0)
  32
  33 #define read_barrier()  mb()
  34 #define write_barrier() mb()
  35
  36 #define CPU_HAS_LLSC    0x0040
  37
  38 static inline int arch_init(char *envp[])
  39 {
  40         Elf32_auxv_t *auxv;
  41
  42         while (*envp++ != NULL)
  43                 ;
  44
  45         for (auxv = (Elf32_auxv_t *) envp; auxv->a_type != AT_NULL; auxv++) {
  46                 if (auxv->a_type == AT_HWCAP) {
  47                         if (auxv->a_un.a_val & CPU_HAS_LLSC) {
  48                                 arch_flags |= ARCH_FLAG_1;
  49                                 break;
  50                         }
  51                 }
  52         }
  53
  54         return 0;
  55 }
  56
  57 #define ARCH_HAVE_INIT
  58
  59 #endif