From 8ca8d7665d671e10d72b8fcb4d69121d75f7906e Mon Sep 17 00:00:00 2001
From: Eric Biederman <ebiederm@xmission.com>
Date: Tue, 22 Apr 2003 19:02:15 +0000
Subject: - Initial checkin of the freebios2 tree

git-svn-id: svn://svn.coreboot.org/coreboot/trunk@784 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
---
 src/include/smp/atomic.h     | 53 ++++++++++++++++++++++++++++++++++++++++++++
 src/include/smp/spinlock.h   | 24 ++++++++++++++++++++
 src/include/smp/start_stop.h | 17 ++++++++++++++
 3 files changed, 94 insertions(+)
 create mode 100644 src/include/smp/atomic.h
 create mode 100644 src/include/smp/spinlock.h
 create mode 100644 src/include/smp/start_stop.h

(limited to 'src/include/smp')

diff --git a/src/include/smp/atomic.h b/src/include/smp/atomic.h
new file mode 100644
index 000000000000..b36e0e20515d
--- /dev/null
+++ b/src/include/smp/atomic.h
@@ -0,0 +1,53 @@
+#ifndef SMP_ATOMIC_H
+#define SMP_ATOMIC_H
+
+#ifdef SMP
+#include <arch/smp/atomic.h>
+#else
+
+typedef struct { int counter; } atomic_t;
+#define ATOMIC_INIT(i) { (i) }
+
+/**
+ * atomic_read - read atomic variable
+ * @v: pointer of type atomic_t
+ * 
+ * Atomically reads the value of @v.  Note that the guaranteed
+ * useful range of an atomic_t is only 24 bits.
+ */ 
+#define atomic_read(v)		((v)->counter)
+
+/**
+ * atomic_set - set atomic variable
+ * @v: pointer of type atomic_t
+ * @i: required value
+ * 
+ * Atomically sets the value of @v to @i.  Note that the guaranteed
+ * useful range of an atomic_t is only 24 bits.
+ */ 
+#define atomic_set(v,i)		(((v)->counter) = (i))
+
+
+/**
+ * atomic_inc - increment atomic variable
+ * @v: pointer of type atomic_t
+ * 
+ * Atomically increments @v by 1.  Note that the guaranteed
+ * useful range of an atomic_t is only 24 bits.
+ */ 
+#define atomic_inc(v)	(((v)->counter)++)
+
+
+/**
+ * atomic_dec - decrement atomic variable
+ * @v: pointer of type atomic_t
+ * 
+ * Atomically decrements @v by 1.  Note that the guaranteed
+ * useful range of an atomic_t is only 24 bits.
+ */ 
+#define atomic_dec(v)	(((v)->counter)--)
+
+
+#endif /* SMP */
+
+#endif /* SMP_ATOMIC_H */
diff --git a/src/include/smp/spinlock.h b/src/include/smp/spinlock.h
new file mode 100644
index 000000000000..9e0f8af0a966
--- /dev/null
+++ b/src/include/smp/spinlock.h
@@ -0,0 +1,24 @@
+#ifndef SMP_SPINLOCK_H
+#define SMP_SPINLOCK_H
+
+#ifdef SMP
+#include <arch/smp/spinlock.h>
+#else /* !SMP */
+
+/* Most GCC versions have a nasty bug with empty initializers */
+#if (__GNUC__ > 2) 
+typedef struct { } spinlock_t;
+#define SPIN_LOCK_UNLOCKED (spinlock_t) { }
+#else
+typedef struct { int gcc_is_buggy; } spinlock_t;
+#define SPIN_LOCK_UNLOCKED (spinlock_t) { 0 }
+#endif
+
+#define barrier()		do {} while(0)
+#define spin_is_locked(lock)	0
+#define spin_unlock_wait(lock)	do {} while(0)
+#define spin_lock(lock)		do {} while(0)
+#define spin_unlock(lock)	do {} while(0)
+#endif
+
+#endif /* SMP_SPINLOCK_H */
diff --git a/src/include/smp/start_stop.h b/src/include/smp/start_stop.h
new file mode 100644
index 000000000000..c0eebd0e2c18
--- /dev/null
+++ b/src/include/smp/start_stop.h
@@ -0,0 +1,17 @@
+#ifndef SMP_START_STOP_H
+#define SMP_START_STOP_H
+
+#if SMP == 1
+#include <smp/atomic.h>
+unsigned long this_processors_id(void);
+int processor_index(unsigned long processor_id);
+void stop_cpu(unsigned long processor_id);
+int start_cpu(unsigned long processor_id);
+void startup_other_cpus(unsigned long *processor_map);
+#else
+#define this_processors_id()	0
+#define startup_other_cpus(p)	do {} while(0)
+#define processor_index(p) 0
+#endif
+
+#endif /* SMP_START_STOP_H */
-- 
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