Make SH port work for packagers that don't differentiate between SH4 and SH4A
[fio.git] / arch / arch-sh.h
index 08c5fb3..ef4ee03 100644 (file)
 
 #define nop             __asm__ __volatile__ ("nop": : :"memory")
 
-#if defined(__SH4A__)
-#define        mb()            __asm__ __volatile__ ("synco": : :"memory")
-#else
-#define mb()           __asm__ __volatile__ (" " : : : "memory")
-#endif
+#define mb()                                                           \
+       do {                                                            \
+               if (arch_flags & ARCH_FLAG_1)                           \
+                       __asm__ __volatile__ ("synco": : :"memory");    \
+               else                                                    \
+                       __asm__ __volatile__ (" " : : : "memory");      \
+       } while (0)
 
 #define read_barrier() mb()
 #define write_barrier()        mb()
 
+#define CPU_HAS_LLSC   0x0040
+
+static inline int arch_init(char *envp[])
+{
+       Elf32_auxv_t *auxv;
+
+       while (*envp++ != NULL)
+               ;
+
+       for (auxv = (Elf32_auxv_t *) envp; auxv->a_type != AT_NULL; auxv++) {
+               if (auxv->a_type == AT_HWCAP) {
+                       if (auxv->a_un.a_val & CPU_HAS_LLSC) {
+                               arch_flags |= ARCH_FLAG_1;
+                               break;
+                       }
+               }
+       }
+
+       return 0;
+}
+
+#define ARCH_HAVE_INIT
+
 #endif