X-Git-Url: https://git.kernel.dk/?p=fio.git;a=blobdiff_plain;f=arch%2Farch-ia64.h;h=37284b1591c37835da23a4f73dae0d0e2cc2e357;hp=b3ee0c38bc13c442d2166eeabcb0a2c745c763e6;hb=edf2c6cf5adc82ee43c81e033cf2215eb9ffdb16;hpb=317b95d07d4921d2594a1be6e014c9c2d062fe75

diff --git a/arch/arch-ia64.h b/arch/arch-ia64.h
index b3ee0c38..37284b15 100644
--- a/arch/arch-ia64.h
+++ b/arch/arch-ia64.h
@@ -18,7 +18,9 @@
 #define __NR_sys_vmsplice	1302
 #endif
 
-#define nop	asm volatile ("hint @pause" ::: "memory");
+#define nop		asm volatile ("hint @pause" ::: "memory");
+#define read_barrier()	asm volatile ("mf" ::: "memory")
+#define writebarrier()	asm volatile ("mf" ::: "memory")
 
 #define ia64_popcnt(x)							\
 ({									\
@@ -27,9 +29,42 @@
 	ia64_intri_res;							\
 })
 
-static inline unsigned long ffz(unsigned long bitmask)
+static inline unsigned long arch_ffz(unsigned long bitmask)
 {
 	return ia64_popcnt(bitmask & (~bitmask - 1));
 }
+#define ARCH_HAVE_FFZ
+
+typedef struct {
+	volatile unsigned int lock;
+} spinlock_t;
+
+#define IA64_SPINLOCK_CLOBBERS "ar.ccv", "ar.pfs", "p14", "p15", "r27", "r28", "r29", "r30", "b6", "memory"
+
+static inline void spin_lock(spinlock_t *lock)
+{
+	register volatile unsigned int *ptr asm ("r31") = &lock->lock;
+	unsigned long flags = 0;
+
+	__asm__ __volatile__("{\n\t"
+			"  mov ar.ccv = r0\n\t"
+			"  mov r28 = ip\n\t"
+			"  mov r30 = 1;;\n\t"
+			"}\n\t"
+			"cmpxchg4.acq r30 = [%1], r30, ar.ccv\n\t"
+			"movl r29 = ia64_spinlock_contention_pre3_4;;\n\t"
+			"cmp4.ne p14, p0 = r30, r0\n\t"
+			"mov b6 = r29;;\n\t"
+			"mov r27=%2\n\t"
+			"(p14) br.cond.spnt.many b6"
+			: "=r"(ptr) : "r"(ptr), "r" (flags)
+			: IA64_SPINLOCK_CLOBBERS);
+}
+
+static inline void spin_unlock(spinlock_t *lock)
+{
+	read_barrier();
+	__asm__ __volatile__("st4.rel.nta [%0] = r0\n\t" :: "r" (lock));
+}
 
 #endif