1 files changed, 69 insertions, 0 deletions
diff --git a/libgloss/sparc_leon/asm-leon/spinlock.h b/libgloss/sparc_leon/asm-leon/spinlock.h
new file mode 100644
index 000000000..c3c0a7c4e
--- /dev/null
+++ b/libgloss/sparc_leon/asm-leon/spinlock.h
@@ -0,0 +1,69 @@
+/*
+ * Copyright (c) 2011 Aeroflex Gaisler
+ *
+ * BSD license:
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+
+#ifndef _INCLUDE_LEONSPINLOCK_h
+#define _INCLUDE_LEONSPINLOCK_h
+
+typedef struct
+{
+  unsigned char lock;
+} raw_spinlock_t;
+
+#define __RAW_SPIN_LOCK_UNLOCKED	{ 0 }
+
+typedef struct
+{
+  volatile unsigned int lock;
+} raw_rwlock_t;
+
+#define __RAW_RW_LOCK_UNLOCKED		{ 0 }
+
+static inline void
+__raw_spin_lock (raw_spinlock_t * lock)
+{
+  __asm__ __volatile__ ("\n1:\n\t" "ldstuba	[%0]1, %%g2\n\t"	/* ASI_LEON23_DCACHE_MISS */
+			"orcc	%%g2, 0x0, %%g0\n\t" "bne,a	2f\n\t" " ldub	[%0], %%g2\n\t" ".subsection	2\n" "2:\n\t" "orcc	%%g2, 0x0, %%g0\n\t" "bne,a	2b\n\t" " ldub	[%0], %%g2\n\t" "b,a	1b\n\t" ".previous\n":	/* no outputs */
+			:"r" (lock):"g2", "memory", "cc");
+}
+
+static inline int
+__raw_spin_trylock (raw_spinlock_t * lock)
+{
+  unsigned int result;
+  __asm__ __volatile__ ("ldstuba [%1]1, %0"	/* ASI_LEON23_DCACHE_MISS */
+			:"=r" (result):"r" (lock):"memory");
+  return (result == 0);
+}
+
+static inline void
+__raw_spin_unlock (raw_spinlock_t * lock)
+{
+  __asm__ __volatile__ ("stb %%g0, [%0]"::"r" (lock):"memory");
+}
+
+
+
+#endif /* _INCLUDE_LEONSPINLOCK_h */
+/* end of include file */