X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?a=blobdiff_plain;f=kitten%2Fkernel%2Fspinlock.c;fp=kitten%2Fkernel%2Fspinlock.c;h=3cbf9ed6171afa81634b7d6ccee1f950ca40e0a4;hb=66a1a4c7a9edcd7d8bc207aca093d694a6e6b5b2;hp=0000000000000000000000000000000000000000;hpb=f7cf9c19ecb0a589dd45ae0d2c91814bd3c2acc2;p=palacios.git

diff --git a/kitten/kernel/spinlock.c b/kitten/kernel/spinlock.c
new file mode 100644
index 0000000..3cbf9ed
--- /dev/null
+++ b/kitten/kernel/spinlock.c
@@ -0,0 +1,257 @@
+/*
+ * Copyright (2004) Linus Torvalds
+ *
+ * Author: Zwane Mwaikambo <zwane@fsmlabs.com>
+ *
+ * Copyright (2004, 2005) Ingo Molnar
+ *
+ * This file contains the spinlock/rwlock implementations for the
+ * SMP and the DEBUG_SPINLOCK cases. 
+ */
+
+#include <lwk/linkage.h>
+#include <lwk/spinlock.h>
+//#include <lwk/interrupt.h>
+#include <lwk/linux_compat.h>
+
+/*
+ * Generic declaration of the raw read_trylock() function,
+ * architectures are supposed to optimize this:
+ */
+int __lockfunc generic__raw_read_trylock(raw_rwlock_t *lock)
+{
+	__raw_read_lock(lock);
+	return 1;
+}
+EXPORT_SYMBOL(generic__raw_read_trylock);
+
+int __lockfunc _spin_trylock(spinlock_t *lock)
+{
+	if (_raw_spin_trylock(lock))
+		return 1;
+	return 0;
+}
+EXPORT_SYMBOL(_spin_trylock);
+
+int __lockfunc _read_trylock(rwlock_t *lock)
+{
+	if (_raw_read_trylock(lock))
+		return 1;
+	return 0;
+}
+EXPORT_SYMBOL(_read_trylock);
+
+int __lockfunc _write_trylock(rwlock_t *lock)
+{
+	if (_raw_write_trylock(lock))
+		return 1;
+	return 0;
+}
+EXPORT_SYMBOL(_write_trylock);
+
+void __lockfunc _read_lock(rwlock_t *lock)
+{
+	_raw_read_lock(lock);
+}
+EXPORT_SYMBOL(_read_lock);
+
+unsigned long __lockfunc _spin_lock_irqsave(spinlock_t *lock)
+{
+	unsigned long flags;
+
+	local_irq_save(flags);
+	_raw_spin_lock_flags(lock, &flags);
+	return flags;
+}
+EXPORT_SYMBOL(_spin_lock_irqsave);
+
+void __lockfunc _spin_lock_irq(spinlock_t *lock)
+{
+	local_irq_disable();
+	_raw_spin_lock(lock);
+}
+EXPORT_SYMBOL(_spin_lock_irq);
+
+#if 0
+void __lockfunc _spin_lock_bh(spinlock_t *lock)
+{
+	local_bh_disable();
+	_raw_spin_lock(lock);
+}
+EXPORT_SYMBOL(_spin_lock_bh);
+#endif
+
+unsigned long __lockfunc _read_lock_irqsave(rwlock_t *lock)
+{
+	unsigned long flags;
+
+	local_irq_save(flags);
+	_raw_read_lock(lock);
+	return flags;
+}
+EXPORT_SYMBOL(_read_lock_irqsave);
+
+void __lockfunc _read_lock_irq(rwlock_t *lock)
+{
+	local_irq_disable();
+	_raw_read_lock(lock);
+}
+EXPORT_SYMBOL(_read_lock_irq);
+
+#if 0
+void __lockfunc _read_lock_bh(rwlock_t *lock)
+{
+	local_bh_disable();
+	_raw_read_lock(lock);
+}
+EXPORT_SYMBOL(_read_lock_bh);
+#endif
+
+unsigned long __lockfunc _write_lock_irqsave(rwlock_t *lock)
+{
+	unsigned long flags;
+
+	local_irq_save(flags);
+	_raw_write_lock(lock);
+	return flags;
+}
+EXPORT_SYMBOL(_write_lock_irqsave);
+
+void __lockfunc _write_lock_irq(rwlock_t *lock)
+{
+	local_irq_disable();
+	_raw_write_lock(lock);
+}
+EXPORT_SYMBOL(_write_lock_irq);
+
+#if 0
+void __lockfunc _write_lock_bh(rwlock_t *lock)
+{
+	local_bh_disable();
+	_raw_write_lock(lock);
+}
+EXPORT_SYMBOL(_write_lock_bh);
+#endif
+
+void __lockfunc _spin_lock(spinlock_t *lock)
+{
+	_raw_spin_lock(lock);
+}
+
+EXPORT_SYMBOL(_spin_lock);
+
+void __lockfunc _write_lock(rwlock_t *lock)
+{
+	_raw_write_lock(lock);
+}
+
+EXPORT_SYMBOL(_write_lock);
+
+void __lockfunc _spin_unlock(spinlock_t *lock)
+{
+	_raw_spin_unlock(lock);
+}
+EXPORT_SYMBOL(_spin_unlock);
+
+void __lockfunc _write_unlock(rwlock_t *lock)
+{
+	_raw_write_unlock(lock);
+}
+EXPORT_SYMBOL(_write_unlock);
+
+void __lockfunc _read_unlock(rwlock_t *lock)
+{
+	_raw_read_unlock(lock);
+}
+EXPORT_SYMBOL(_read_unlock);
+
+void __lockfunc _spin_unlock_irqrestore(spinlock_t *lock, unsigned long flags)
+{
+	_raw_spin_unlock(lock);
+	local_irq_restore(flags);
+}
+EXPORT_SYMBOL(_spin_unlock_irqrestore);
+
+void __lockfunc _spin_unlock_irq(spinlock_t *lock)
+{
+	_raw_spin_unlock(lock);
+	local_irq_enable();
+}
+EXPORT_SYMBOL(_spin_unlock_irq);
+
+#if 0
+void __lockfunc _spin_unlock_bh(spinlock_t *lock)
+{
+	_raw_spin_unlock(lock);
+	local_bh_enable();
+}
+EXPORT_SYMBOL(_spin_unlock_bh);
+#endif
+
+void __lockfunc _read_unlock_irqrestore(rwlock_t *lock, unsigned long flags)
+{
+	_raw_read_unlock(lock);
+	local_irq_restore(flags);
+}
+EXPORT_SYMBOL(_read_unlock_irqrestore);
+
+void __lockfunc _read_unlock_irq(rwlock_t *lock)
+{
+	_raw_read_unlock(lock);
+	local_irq_enable();
+}
+EXPORT_SYMBOL(_read_unlock_irq);
+
+#if 0
+void __lockfunc _read_unlock_bh(rwlock_t *lock)
+{
+	_raw_read_unlock(lock);
+	local_bh_enable();
+}
+EXPORT_SYMBOL(_read_unlock_bh);
+#endif
+
+void __lockfunc _write_unlock_irqrestore(rwlock_t *lock, unsigned long flags)
+{
+	_raw_write_unlock(lock);
+	local_irq_restore(flags);
+}
+EXPORT_SYMBOL(_write_unlock_irqrestore);
+
+void __lockfunc _write_unlock_irq(rwlock_t *lock)
+{
+	_raw_write_unlock(lock);
+	local_irq_enable();
+}
+EXPORT_SYMBOL(_write_unlock_irq);
+
+#if 0
+void __lockfunc _write_unlock_bh(rwlock_t *lock)
+{
+	_raw_write_unlock(lock);
+	local_bh_enable();
+}
+EXPORT_SYMBOL(_write_unlock_bh);
+#endif
+
+#if 0
+int __lockfunc _spin_trylock_bh(spinlock_t *lock)
+{
+	local_bh_disable();
+	if (_raw_spin_trylock(lock))
+		return 1;
+	local_bh_enable();
+	return 0;
+}
+EXPORT_SYMBOL(_spin_trylock_bh);
+#endif
+
+int in_lock_functions(unsigned long addr)
+{
+	/* Linker adds these: start and end of __lockfunc functions */
+	extern char __lock_text_start[], __lock_text_end[];
+
+	return addr >= (unsigned long)__lock_text_start
+	&& addr < (unsigned long)__lock_text_end;
+}
+EXPORT_SYMBOL(in_lock_functions);