1 files changed, 74 insertions, 0 deletions
diff --git a/include/linux/msm_remote_spinlock.h b/include/linux/msm_remote_spinlock.h
new file mode 100644
index 000000000000..f777cef4e1d7
--- /dev/null
+++ b/include/linux/msm_remote_spinlock.h
@@ -0,0 +1,74 @@
+/* Copyright (c) 2009, 2011, 2013-2014 The Linux Foundation.
+ * All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+
+/*
+ * Part of this this code is based on the standard ARM spinlock
+ * implementation (asm/spinlock.h) found in the 2.6.29 kernel.
+ */
+
+#ifndef __ASM__ARCH_QC_REMOTE_SPINLOCK_H
+#define __ASM__ARCH_QC_REMOTE_SPINLOCK_H
+
+#include <linux/io.h>
+#include <linux/types.h>
+
+#define REMOTE_SPINLOCK_NUM_PID 128
+#define REMOTE_SPINLOCK_TID_START REMOTE_SPINLOCK_NUM_PID
+
+/* Remote spinlock definitions. */
+
+typedef struct {
+	volatile uint32_t lock;
+} raw_remote_spinlock_t;
+
+typedef raw_remote_spinlock_t *_remote_spinlock_t;
+
+#define remote_spinlock_id_t const char *
+
+#if defined(CONFIG_REMOTE_SPINLOCK_MSM)
+int _remote_spin_lock_init(remote_spinlock_id_t, _remote_spinlock_t *lock);
+void _remote_spin_release_all(uint32_t pid);
+void _remote_spin_lock(_remote_spinlock_t *lock);
+void _remote_spin_unlock(_remote_spinlock_t *lock);
+int _remote_spin_trylock(_remote_spinlock_t *lock);
+int _remote_spin_release(_remote_spinlock_t *lock, uint32_t pid);
+int _remote_spin_owner(_remote_spinlock_t *lock);
+void _remote_spin_lock_rlock_id(_remote_spinlock_t *lock, uint32_t tid);
+void _remote_spin_unlock_rlock(_remote_spinlock_t *lock);
+#else
+static inline
+int _remote_spin_lock_init(remote_spinlock_id_t id, _remote_spinlock_t *lock)
+{
+	return -EINVAL;
+}
+static inline void _remote_spin_release_all(uint32_t pid) {}
+static inline void _remote_spin_lock(_remote_spinlock_t *lock) {}
+static inline void _remote_spin_unlock(_remote_spinlock_t *lock) {}
+static inline int _remote_spin_trylock(_remote_spinlock_t *lock)
+{
+	return -ENODEV;
+}
+static inline int _remote_spin_release(_remote_spinlock_t *lock, uint32_t pid)
+{
+	return -ENODEV;
+}
+static inline int _remote_spin_owner(_remote_spinlock_t *lock)
+{
+	return -ENODEV;
+}
+static inline void _remote_spin_lock_rlock_id(_remote_spinlock_t *lock,
+					      uint32_t tid) {}
+static inline void _remote_spin_unlock_rlock(_remote_spinlock_t *lock) {}
+#endif
+#endif /* __ASM__ARCH_QC_REMOTE_SPINLOCK_H */