Initial version

1 files changed, 48 insertions, 0 deletions

diff --git a/arch/sh/atomic_arch.h b/arch/sh/atomic_arch.h
new file mode 100644
index 0000000..0a4d0c1
--- /dev/null
+++ b/arch/sh/atomic_arch.h
@@ -0,0 +1,48 @@
+#include "libc.h"
+
+#if defined(__SH4A__)
+
+#define a_ll a_ll
+static inline int a_ll(volatile int *p)
+{
+	int v;
+	__asm__ __volatile__ ("movli.l @%1, %0" : "=z"(v) : "r"(p), "m"(*p));
+	return v;
+}
+
+#define a_sc a_sc
+static inline int a_sc(volatile int *p, int v)
+{
+	int r;
+	__asm__ __volatile__ (
+		"movco.l %2, @%3 ; movt %0"
+		: "=r"(r), "=m"(*p) : "z"(v), "r"(p) : "memory", "cc");
+	return r;
+}
+
+#define a_barrier a_barrier
+static inline void a_barrier()
+{
+	__asm__ __volatile__ ("synco" ::: "memory");
+}
+
+#define a_pre_llsc a_barrier
+#define a_post_llsc a_barrier
+
+#else
+
+#define a_cas a_cas
+extern hidden const void *__sh_cas_ptr;
+static inline int a_cas(volatile int *p, int t, int s)
+{
+	register int r1 __asm__("r1");
+	register int r2 __asm__("r2") = t;
+	register int r3 __asm__("r3") = s;
+	__asm__ __volatile__ (
+		"jsr @%4 ; nop"
+		: "=r"(r1), "+r"(r3) : "z"(p), "r"(r2), "r"(__sh_cas_ptr)
+		: "memory", "pr", "cc");
+	return r3;
+}
+
+#endif