Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 194 insertions, 0 deletions

diff --git a/include/asm-h8300/semaphore.h b/include/asm-h8300/semaphore.h
new file mode 100644
index 000000000000..fe6ef3774297
--- /dev/null
+++ b/include/asm-h8300/semaphore.h
@@ -0,0 +1,194 @@
+#ifndef _H8300_SEMAPHORE_H
+#define _H8300_SEMAPHORE_H
+
+#define RW_LOCK_BIAS		 0x01000000
+
+#ifndef __ASSEMBLY__
+
+#include <linux/linkage.h>
+#include <linux/wait.h>
+#include <linux/spinlock.h>
+#include <linux/rwsem.h>
+
+#include <asm/system.h>
+#include <asm/atomic.h>
+
+/*
+ * Interrupt-safe semaphores..
+ *
+ * (C) Copyright 1996 Linus Torvalds
+ *
+ * H8/300 version by Yoshinori Sato
+ */
+
+
+struct semaphore {
+	atomic_t count;
+	int sleepers;
+	wait_queue_head_t wait;
+};
+
+#define __SEMAPHORE_INITIALIZER(name, n)				\
+{									\
+	.count		= ATOMIC_INIT(n),				\
+	.sleepers	= 0,						\
+	.wait		= __WAIT_QUEUE_HEAD_INITIALIZER((name).wait)	\
+}
+
+#define __MUTEX_INITIALIZER(name) \
+	__SEMAPHORE_INITIALIZER(name,1)
+
+#define __DECLARE_SEMAPHORE_GENERIC(name,count) \
+	struct semaphore name = __SEMAPHORE_INITIALIZER(name,count)
+
+#define DECLARE_MUTEX(name) __DECLARE_SEMAPHORE_GENERIC(name,1)
+#define DECLARE_MUTEX_LOCKED(name) __DECLARE_SEMAPHORE_GENERIC(name,0)
+
+static inline void sema_init (struct semaphore *sem, int val)
+{
+	*sem = (struct semaphore)__SEMAPHORE_INITIALIZER(*sem, val);
+}
+
+static inline void init_MUTEX (struct semaphore *sem)
+{
+	sema_init(sem, 1);
+}
+
+static inline void init_MUTEX_LOCKED (struct semaphore *sem)
+{
+	sema_init(sem, 0);
+}
+
+asmlinkage void __down_failed(void /* special register calling convention */);
+asmlinkage int  __down_failed_interruptible(void  /* params in registers */);
+asmlinkage int  __down_failed_trylock(void  /* params in registers */);
+asmlinkage void __up_wakeup(void /* special register calling convention */);
+
+asmlinkage void __down(struct semaphore * sem);
+asmlinkage int  __down_interruptible(struct semaphore * sem);
+asmlinkage int  __down_trylock(struct semaphore * sem);
+asmlinkage void __up(struct semaphore * sem);
+
+extern spinlock_t semaphore_wake_lock;
+
+/*
+ * This is ugly, but we want the default case to fall through.
+ * "down_failed" is a special asm handler that calls the C
+ * routine that actually waits. See arch/m68k/lib/semaphore.S
+ */
+static inline void down(struct semaphore * sem)
+{
+	register atomic_t *count asm("er0");
+
+	might_sleep();
+
+	count = &(sem->count);
+	__asm__ __volatile__(
+		"stc ccr,r3l\n\t"
+		"orc #0x80,ccr\n\t"
+		"mov.l %2, er1\n\t"
+		"dec.l #1,er1\n\t"
+		"mov.l er1,%0\n\t"
+		"bpl 1f\n\t"
+		"ldc r3l,ccr\n\t"
+		"mov.l %1,er0\n\t"
+		"jsr @___down\n\t"
+		"bra 2f\n"
+		"1:\n\t"
+		"ldc r3l,ccr\n"
+		"2:"
+		: "=m"(*count)
+		: "g"(sem),"m"(*count)
+		: "cc",  "er1", "er2", "er3");
+}
+
+static inline int down_interruptible(struct semaphore * sem)
+{
+	register atomic_t *count asm("er0");
+
+	might_sleep();
+
+	count = &(sem->count);
+	__asm__ __volatile__(
+		"stc ccr,r1l\n\t"
+		"orc #0x80,ccr\n\t"
+		"mov.l %3, er2\n\t"
+		"dec.l #1,er2\n\t"
+		"mov.l er2,%1\n\t"
+		"bpl 1f\n\t"
+		"ldc r1l,ccr\n\t"
+		"mov.l %2,er0\n\t"
+		"jsr @___down_interruptible\n\t"
+		"bra 2f\n"
+		"1:\n\t"
+		"ldc r1l,ccr\n\t"
+		"sub.l %0,%0\n\t"
+		"2:\n\t"
+		: "=r" (count),"=m" (*count)
+		: "g"(sem),"m"(*count)
+		: "cc", "er1", "er2", "er3");
+	return (int)count;
+}
+
+static inline int down_trylock(struct semaphore * sem)
+{
+	register atomic_t *count asm("er0");
+
+	count = &(sem->count);
+	__asm__ __volatile__(
+		"stc ccr,r3l\n\t"
+		"orc #0x80,ccr\n\t"
+		"mov.l %3,er2\n\t"
+		"dec.l #1,er2\n\t"
+		"mov.l er2,%0\n\t"
+		"bpl 1f\n\t"
+		"ldc r3l,ccr\n\t"
+		"jmp @3f\n\t"
+		LOCK_SECTION_START(".align 2\n\t")
+		"3:\n\t"
+		"mov.l %2,er0\n\t"
+		"jsr @___down_trylock\n\t"
+		"jmp @2f\n\t"
+		LOCK_SECTION_END
+		"1:\n\t"
+		"ldc r3l,ccr\n\t"
+		"sub.l %1,%1\n"
+		"2:"
+		: "=m" (*count),"=r"(count)
+		: "g"(sem),"m"(*count)
+		: "cc", "er1","er2", "er3");
+	return (int)count;
+}
+
+/*
+ * Note! This is subtle. We jump to wake people up only if
+ * the semaphore was negative (== somebody was waiting on it).
+ * The default case (no contention) will result in NO
+ * jumps for both down() and up().
+ */
+static inline void up(struct semaphore * sem)
+{
+	register atomic_t *count asm("er0");
+
+	count = &(sem->count);
+	__asm__ __volatile__(
+		"stc ccr,r3l\n\t"
+		"orc #0x80,ccr\n\t"
+		"mov.l %2,er1\n\t"
+		"inc.l #1,er1\n\t"
+		"mov.l er1,%0\n\t"
+		"ldc r3l,ccr\n\t"
+		"sub.l er2,er2\n\t"
+		"cmp.l er2,er1\n\t"
+		"bgt 1f\n\t"
+		"mov.l %1,er0\n\t"
+		"jsr @___up\n"
+		"1:"
+		: "=m"(*count)
+		: "g"(sem),"m"(*count)
+		: "cc", "er1", "er2", "er3");
+}
+
+#endif /* __ASSEMBLY__ */
+
+#endif