arch/arch-sh.h

   1 /* Renesas SH (32bit) only */
   2
   3 #ifndef ARCH_SH_H
   4 #define ARCH_SH_H
   5
   6 #define FIO_ARCH        (arch_sh)
   7
   8 #define nop             __asm__ __volatile__ ("nop": : :"memory")
   9
  10 #define mb()                                                            \
  11         do {                                                            \
  12                 if (arch_flags & ARCH_FLAG_1)                           \
  13                         __asm__ __volatile__ ("synco": : :"memory");    \
  14                 else                                                    \
  15                         __asm__ __volatile__ (" " : : : "memory");      \
  16         } while (0)
  17
  18 #define read_barrier()  mb()
  19 #define write_barrier() mb()
  20
  21 #include <stdio.h>
  22 #include <elf.h>
  23
  24 extern unsigned long arch_flags;
  25
  26 #define CPU_HAS_LLSC    0x0040
  27
  28 static inline int arch_init(char *envp[])
  29 {
  30         Elf32_auxv_t *auxv;
  31
  32         while (*envp++ != NULL)
  33                 ;
  34
  35         for (auxv = (Elf32_auxv_t *) envp; auxv->a_type != AT_NULL; auxv++) {
  36                 if (auxv->a_type == AT_HWCAP) {
  37                         if (auxv->a_un.a_val & CPU_HAS_LLSC) {
  38                                 arch_flags |= ARCH_FLAG_1;
  39                                 break;
  40                         }
  41                 }
  42         }
  43
  44         return 0;
  45 }
  46
  47 #define ARCH_HAVE_INIT
  48
  49 #endif