X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=include%2Fasm-m68k%2Fatomic.h;h=3f867738062a94bd65723501f530ce94c267a971;hb=9bf4aaab3e101692164d49b7ca357651eb691cb6;hp=d7ef37661179e0d682124410da3e82690f4e5de9;hpb=5273a3df6485dc2ad6aa7ddd441b9a21970f003b;p=linux-2.6.git

diff --git a/include/asm-m68k/atomic.h b/include/asm-m68k/atomic.h
index d7ef37661..3f8677380 100644
--- a/include/asm-m68k/atomic.h
+++ b/include/asm-m68k/atomic.h
@@ -1,6 +1,8 @@
 #ifndef __ARCH_M68K_ATOMIC__
 #define __ARCH_M68K_ATOMIC__
 
+#include <asm/system.h>	/* local_irq_XXX() */
+
 /*
  * Atomic operations that C can't guarantee us.  Useful for
  * resource counting etc..
@@ -16,38 +18,124 @@ typedef struct { int counter; } atomic_t;
 #define atomic_read(v)		((v)->counter)
 #define atomic_set(v, i)	(((v)->counter) = i)
 
-static __inline__ void atomic_add(int i, atomic_t *v)
+static inline void atomic_add(int i, atomic_t *v)
+{
+	__asm__ __volatile__("addl %1,%0" : "+m" (*v) : "id" (i));
+}
+
+static inline void atomic_sub(int i, atomic_t *v)
+{
+	__asm__ __volatile__("subl %1,%0" : "+m" (*v) : "id" (i));
+}
+
+static inline void atomic_inc(atomic_t *v)
+{
+	__asm__ __volatile__("addql #1,%0" : "+m" (*v));
+}
+
+static inline void atomic_dec(atomic_t *v)
+{
+	__asm__ __volatile__("subql #1,%0" : "+m" (*v));
+}
+
+static inline int atomic_dec_and_test(atomic_t *v)
+{
+	char c;
+	__asm__ __volatile__("subql #1,%1; seq %0" : "=d" (c), "+m" (*v));
+	return c != 0;
+}
+
+static inline int atomic_inc_and_test(atomic_t *v)
+{
+	char c;
+	__asm__ __volatile__("addql #1,%1; seq %0" : "=d" (c), "+m" (*v));
+	return c != 0;
+}
+
+#ifdef CONFIG_RMW_INSNS
+static inline int atomic_add_return(int i, atomic_t *v)
 {
-	__asm__ __volatile__("addl %1,%0" : "=m" (*v) : "id" (i), "0" (*v));
+	int t, tmp;
+
+	__asm__ __volatile__(
+			"1:	movel %2,%1\n"
+			"	addl %3,%1\n"
+			"	casl %2,%1,%0\n"
+			"	jne 1b"
+			: "+m" (*v), "=&d" (t), "=&d" (tmp)
+			: "g" (i), "2" (atomic_read(v)));
+	return t;
 }
 
-static __inline__ void atomic_sub(int i, atomic_t *v)
+static inline int atomic_sub_return(int i, atomic_t *v)
 {
-	__asm__ __volatile__("subl %1,%0" : "=m" (*v) : "id" (i), "0" (*v));
+	int t, tmp;
+
+	__asm__ __volatile__(
+			"1:	movel %2,%1\n"
+			"	subl %3,%1\n"
+			"	casl %2,%1,%0\n"
+			"	jne 1b"
+			: "+m" (*v), "=&d" (t), "=&d" (tmp)
+			: "g" (i), "2" (atomic_read(v)));
+	return t;
+}
+#else /* !CONFIG_RMW_INSNS */
+static inline int atomic_add_return(int i, atomic_t * v)
+{
+	unsigned long flags;
+	int t;
+
+	local_irq_save(flags);
+	t = atomic_read(v);
+	t += i;
+	atomic_set(v, t);
+	local_irq_restore(flags);
+
+	return t;
 }
 
-static __inline__ void atomic_inc(volatile atomic_t *v)
+static inline int atomic_sub_return(int i, atomic_t * v)
 {
-	__asm__ __volatile__("addql #1,%0" : "=m" (*v): "0" (*v));
+	unsigned long flags;
+	int t;
+
+	local_irq_save(flags);
+	t = atomic_read(v);
+	t -= i;
+	atomic_set(v, t);
+	local_irq_restore(flags);
+
+	return t;
 }
+#endif /* !CONFIG_RMW_INSNS */
+
+#define atomic_dec_return(v)	atomic_sub_return(1, (v))
+#define atomic_inc_return(v)	atomic_add_return(1, (v))
 
-static __inline__ void atomic_dec(volatile atomic_t *v)
+static inline int atomic_sub_and_test(int i, atomic_t *v)
 {
-	__asm__ __volatile__("subql #1,%0" : "=m" (*v): "0" (*v));
+	char c;
+	__asm__ __volatile__("subl %2,%1; seq %0" : "=d" (c), "+m" (*v): "g" (i));
+	return c != 0;
 }
 
-static __inline__ int atomic_dec_and_test(volatile atomic_t *v)
+static inline int atomic_add_negative(int i, atomic_t *v)
 {
 	char c;
-	__asm__ __volatile__("subql #1,%1; seq %0" : "=d" (c), "=m" (*v): "1" (*v));
+	__asm__ __volatile__("addl %2,%1; smi %0" : "=d" (c), "+m" (*v): "g" (i));
 	return c != 0;
 }
 
-#define atomic_clear_mask(mask, v) \
-	__asm__ __volatile__("andl %1,%0" : "=m" (*v) : "id" (~(mask)),"0"(*v))
+static inline void atomic_clear_mask(unsigned long mask, unsigned long *v)
+{
+	__asm__ __volatile__("andl %1,%0" : "+m" (*v) : "id" (~(mask)));
+}
 
-#define atomic_set_mask(mask, v) \
-	__asm__ __volatile__("orl %1,%0" : "=m" (*v) : "id" (mask),"0"(*v))
+static inline void atomic_set_mask(unsigned long mask, unsigned long *v)
+{
+	__asm__ __volatile__("orl %1,%0" : "+m" (*v) : "id" (mask));
+}
 
 /* Atomic operations are already serializing */
 #define smp_mb__before_atomic_dec()	barrier()