#define FIO_HAVE_SYSLET
#define nop __asm__ __volatile__("rep;nop": : :"memory")
-#define read_barrier() asm volatile("lfence":::"memory")
+#define read_barrier() __asm__ __volatile__("lfence":::"memory")
+#define write_barrier() __asm__ __volatile__("sfence":::"memory")
-static inline unsigned long arch_ffz(unsigned long bitmask)
+static inline unsigned int arch_ffz(unsigned int bitmask)
{
- __asm__("bsfq %1,%0" :"=r" (bitmask) :"r" (~bitmask));
+ __asm__("bsfl %1,%0" :"=r" (bitmask) :"r" (~bitmask));
return bitmask;
}
#define ARCH_HAVE_FFZ
+typedef struct {
+ unsigned int lock;
+} spinlock_t;
+
+static inline void spin_lock(spinlock_t *lock)
+{
+ short inc = 0x0100;
+
+ __asm__ __volatile__("xaddw %w0, %1\n"
+ "1:\t"
+ "cmpb %h0, %b0\n\t"
+ "je 2f\n\t"
+ "rep ; nop\n\t"
+ "movb %1, %b0\n\t"
+ "jmp 1b\n"
+ "2:"
+ : "+Q" (inc), "+m" (lock->lock)
+ :
+ : "memory", "cc");
+}
+
+static inline void spin_unlock(spinlock_t *lock)
+{
+ __asm__ __volatile__("incb %0"
+ : "+m" (lock->lock)
+ :
+ : "memory", "cc");
+}
+
#endif