X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=arch%2Fsh%2Fatomic.h;h=f2e6dacbee9856103a6767f9409ccaf77de4fdde;hb=cd7159e7be73451befedce2e9dfd9f6a4c3b21f0;hp=93ab54fe11abdf01eeacb6330500ee996294e2b1;hpb=90e51e45f57eb0e1564b3610b9bbd768215e5d6d;p=musl

diff --git a/arch/sh/atomic.h b/arch/sh/atomic.h
index 93ab54fe..f2e6dacb 100644
--- a/arch/sh/atomic.h
+++ b/arch/sh/atomic.h
@@ -22,6 +22,88 @@ static inline int a_ctz_64(uint64_t x)
 	return a_ctz_l(y);
 }
 
+#define LLSC_CLOBBERS "r0", "t", "memory"
+#define LLSC_START(mem) "synco\n"  \
+	"0:	movli.l @" mem ", r0\n"
+#define LLSC_END(mem)              \
+	"1:	movco.l r0, @" mem "\n"    \
+	"	bf 0b\n"                   \
+	"	synco\n"
+
+static inline int __sh_cas_llsc(volatile int *p, int t, int s)
+{
+	int old;
+	__asm__ __volatile__(
+		LLSC_START("%1")
+		"	mov r0, %0\n"
+		"	cmp/eq %0, %2\n"
+		"	bf 1f\n"
+		"	mov %3, r0\n"
+		LLSC_END("%1")
+		: "=&r"(old) : "r"(p), "r"(t), "r"(s) : LLSC_CLOBBERS);
+	return old;
+}
+
+static inline int __sh_swap_llsc(volatile int *x, int v)
+{
+	int old;
+	__asm__ __volatile__(
+		LLSC_START("%1")
+		"	mov r0, %0\n"
+		"	mov %2, r0\n"
+		LLSC_END("%1")
+		: "=&r"(old) : "r"(x), "r"(v) : LLSC_CLOBBERS);
+	return old;
+}
+
+static inline int __sh_fetch_add_llsc(volatile int *x, int v)
+{
+	int old;
+	__asm__ __volatile__(
+		LLSC_START("%1")
+		"	mov r0, %0\n"
+		"	add %2, r0\n"
+		LLSC_END("%1")
+		: "=&r"(old) : "r"(x), "r"(v) : LLSC_CLOBBERS);
+	return old;
+}
+
+static inline void __sh_store_llsc(volatile int *p, int x)
+{
+	__asm__ __volatile__(
+		"	synco\n"
+		"	mov.l %1, @%0\n"
+		"	synco\n"
+		: : "r"(p), "r"(x) : "memory");
+}
+
+static inline void __sh_and_llsc(volatile int *x, int v)
+{
+	__asm__ __volatile__(
+		LLSC_START("%0")
+		"	and %1, r0\n"
+		LLSC_END("%0")
+		: : "r"(x), "r"(v) : LLSC_CLOBBERS);
+}
+
+static inline void __sh_or_llsc(volatile int *x, int v)
+{
+	__asm__ __volatile__(
+		LLSC_START("%0")
+		"	or %1, r0\n"
+		LLSC_END("%0")
+		: : "r"(x), "r"(v) : LLSC_CLOBBERS);
+}
+
+#ifdef __SH4A__
+#define a_cas(p,t,s)     __sh_cas_llsc(p,t,s)
+#define a_swap(x,v)      __sh_swap_llsc(x,v)
+#define a_fetch_add(x,v) __sh_fetch_add_llsc(x, v)
+#define a_store(x,v)     __sh_store_llsc(x, v)
+#define a_and(x,v)       __sh_and_llsc(x, v)
+#define a_or(x,v)        __sh_or_llsc(x, v)
+#else
+
 int  __sh_cas(volatile int *, int, int);
 int  __sh_swap(volatile int *, int);
 int  __sh_fetch_add(volatile int *, int);
@@ -35,6 +117,7 @@ void __sh_or(volatile int *, int);
 #define a_store(x,v)     __sh_store(x, v)
 #define a_and(x,v)       __sh_and(x, v)
 #define a_or(x,v)        __sh_or(x, v)
+#endif
 
 static inline void *a_cas_p(volatile void *p, void *t, void *s)
 {
@@ -51,8 +134,11 @@ static inline void a_dec(volatile int *x)
 	a_fetch_add(x, -1);
 }
 
-static inline void a_spin()
+#define a_spin a_barrier
+
+static inline void a_barrier()
 {
+	a_cas(&(int){0}, 0, 0);
 }
 
 static inline void a_crash()