initial import of NetBSD tree

1 files changed, 134 insertions, 0 deletions

diff --git a/sys/arch/i386/include/cpufunc.h b/sys/arch/i386/include/cpufunc.h
new file mode 100644
index 00000000000..6a35e8deb1f
--- /dev/null
+++ b/sys/arch/i386/include/cpufunc.h
@@ -0,0 +1,134 @@
+/*	$NetBSD: cpufunc.h,v 1.8 1994/10/27 04:15:59 cgd Exp $	*/
+
+/*
+ * Copyright (c) 1993 Charles Hannum.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed by Charles Hannum.
+ * 4. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _I386_CPUFUNC_H_
+#define	_I386_CPUFUNC_H_
+
+/*
+ * Functions to provide access to i386-specific instructions.
+ */
+
+#include <sys/cdefs.h>
+#include <sys/types.h>
+
+static __inline int bdb(void)
+{
+	extern int bdb_exists;
+
+	if (!bdb_exists)
+		return (0);
+	__asm __volatile("int $3");
+	return (1);
+}
+
+static __inline void
+lidt(void *p)
+{
+	__asm __volatile("lidt (%0)" : : "r" (p));
+}
+
+static __inline void
+lldt(u_short sel)
+{
+	__asm __volatile("lldt %0" : : "r" (sel));
+}
+
+static __inline void
+ltr(u_short sel)
+{
+	__asm __volatile("ltr %0" : : "r" (sel));
+}
+
+static __inline void
+lcr0(u_int val)
+{
+	__asm __volatile("movl %0,%%cr0" : : "r" (val));
+}
+
+static __inline u_int
+rcr0(void)
+{
+	u_int val;
+	__asm __volatile("movl %%cr0,%0" : "=r" (val));
+	return val;
+}
+
+static __inline u_int
+rcr2(void)
+{
+	u_int val;
+	__asm __volatile("movl %%cr2,%0" : "=r" (val));
+	return val;
+}
+
+static __inline void
+lcr3(u_int val)
+{
+	__asm __volatile("movl %0,%%cr3" : : "r" (val));
+}
+
+static __inline u_int
+rcr3(void)
+{
+	u_int val;
+	__asm __volatile("movl %%cr3,%0" : "=r" (val));
+	return val;
+}
+
+static __inline void
+tlbflush(void)
+{
+	u_int val;
+	__asm __volatile("movl %%cr3,%0" : "=r" (val));
+	__asm __volatile("movl %0,%%cr3" : : "r" (val));
+}
+
+#ifdef notyet
+void	setidt	__P((int idx, /*XXX*/caddr_t func, int typ, int dpl));
+#endif
+
+
+/* XXXX ought to be in psl.h with spl() functions */
+
+static __inline void
+disable_intr(void)
+{
+	__asm __volatile("cli");
+}
+
+static __inline void
+enable_intr(void)
+{
+	__asm __volatile("sti");
+}
+
+#endif /* !_I386_CPUFUNC_H_ */