1 files changed, 75 insertions, 0 deletions
diff --git a/sys/sparc64/include/critical.h b/sys/sparc64/include/critical.h
new file mode 100644
index 000000000000..eee9914adc12
--- /dev/null
+++ b/sys/sparc64/include/critical.h
@@ -0,0 +1,75 @@
+/*-
+ * Copyright (c) 2002 Matthew Dillon.  This code is distributed under
+ * the BSD copyright, /usr/src/COPYRIGHT.
+ *
+ * This file contains prototypes and high-level inlines related to
+ * machine-level critical function support:
+ *
+ *	cpu_critical_enter()		- inlined
+ *	cpu_critical_exit()		- inlined
+ *	cpu_critical_fork_exit()	- prototyped
+ *	cpu_thread_link()		- prototyped
+ *	related support functions residing
+ *	in <arch>/<arch>/critical.c	- prototyped
+ *
+ * $FreeBSD$
+ */
+
+#ifndef _MACHINE_CRITICAL_H_
+#define	_MACHINE_CRITICAL_H_
+
+__BEGIN_DECLS
+
+/*
+ * Prototypes - see <arch>/<arch>/critical.c
+ */
+void cpu_critical_fork_exit(void);
+void cpu_thread_link(struct thread *td);
+
+#ifdef	__GNUC__
+
+/*
+ *	cpu_critical_enter:
+ *
+ *	This routine is called from critical_enter() on the 0->1 transition
+ *	of td_critnest, prior to it being incremented to 1.
+ */
+static __inline void
+cpu_critical_enter(void)
+{
+	struct thread *td;
+	critical_t pil;
+
+	td = curthread;
+	pil = rdpr(pil);
+	wrpr(pil, 0, 14);
+	td->td_md.md_savecrit = pil;
+} 
+ 
+
+/*
+ *	cpu_critical_exit:
+ *
+ *	This routine is called from critical_exit() on a 1->0 transition
+ *	of td_critnest, after it has been decremented to 0.  We are
+ *	exiting the last critical section.
+ */
+static __inline void
+cpu_critical_exit(void)
+{
+	struct thread *td;
+
+	td = curthread;
+	wrpr(pil, td->td_md.md_savecrit, 0);
+}
+
+#else /* !__GNUC__ */
+
+void cpu_critical_enter(void)
+void cpu_critical_exit(void)
+
+#endif	/* __GNUC__ */
+
+__END_DECLS
+
+#endif /* !_MACHINE_CRITICAL_H_ */