1 files changed, 61 insertions, 0 deletions
diff --git a/arch/mips/atomic_arch.h b/arch/mips/atomic_arch.h
new file mode 100644
index 00000000..b111c894
--- /dev/null
+++ b/arch/mips/atomic_arch.h
@@ -0,0 +1,61 @@
+#define a_cas a_cas
+static inline int a_cas(volatile int *p, int t, int s)
+{
+	int dummy;
+	__asm__ __volatile__(
+		".set push\n"
+		".set mips2\n"
+		".set noreorder\n"
+		"	sync\n"
+		"1:	ll %0, %2\n"
+		"	bne %0, %3, 1f\n"
+		"	addu %1, %4, $0\n"
+		"	sc %1, %2\n"
+		"	beq %1, $0, 1b\n"
+		"	nop\n"
+		"	sync\n"
+		"1:	\n"
+		".set pop\n"
+		: "=&r"(t), "=&r"(dummy), "+m"(*p) : "r"(t), "r"(s) : "memory" );
+        return t;
+}
+
+#define a_swap a_swap
+static inline int a_swap(volatile int *x, int v)
+{
+	int old, dummy;
+	__asm__ __volatile__(
+		".set push\n"
+		".set mips2\n"
+		".set noreorder\n"
+		"	sync\n"
+		"1:	ll %0, %2\n"
+		"	addu %1, %3, $0\n"
+		"	sc %1, %2\n"
+		"	beq %1, $0, 1b\n"
+		"	nop\n"
+		"	sync\n"
+		".set pop\n"
+		: "=&r"(old), "=&r"(dummy), "+m"(*x) : "r"(v) : "memory" );
+        return old;
+}
+
+#define a_fetch_add a_fetch_add
+static inline int a_fetch_add(volatile int *x, int v)
+{
+	int old, dummy;
+	__asm__ __volatile__(
+		".set push\n"
+		".set mips2\n"
+		".set noreorder\n"
+		"	sync\n"
+		"1:	ll %0, %2\n"
+		"	addu %1, %0, %3\n"
+		"	sc %1, %2\n"
+		"	beq %1, $0, 1b\n"
+		"	nop\n"
+		"	sync\n"
+		".set pop\n"
+		: "=&r"(old), "=&r"(dummy), "+m"(*x) : "r"(v) : "memory" );
+        return old;
+}