1 files changed, 108 insertions, 0 deletions
diff --git a/sys/i386/include/cpufunc.h b/sys/i386/include/cpufunc.h
new file mode 100644
index 0000000..df871cb
--- /dev/null
+++ b/sys/i386/include/cpufunc.h
@@ -0,0 +1,108 @@
+/*
+ * Functions to provide access to special i386 instructions.
+ * XXX - bezillions more are defined in locore.s but are not declared anywhere.
+ *
+ *	$Id: cpufunc.h,v 1.9 1994/01/31 23:48:23 davidg Exp $
+ */
+
+#ifndef _MACHINE_CPUFUNC_H_
+#define _MACHINE_CPUFUNC_H_ 1
+
+#include <sys/cdefs.h>
+#include <sys/types.h>
+
+#include "machine/spl.h"
+
+#ifdef	__GNUC__
+
+static inline int bdb(void)
+{
+	extern int bdb_exists;
+
+	if (!bdb_exists)
+		return (0);
+	__asm("int $3");
+	return (1);
+}
+
+static inline void
+disable_intr(void)
+{
+	__asm __volatile("cli");
+}
+
+static inline void
+enable_intr(void)
+{
+	__asm __volatile("sti");
+}
+
+/*
+ * This roundabout method of returning a u_char helps stop gcc-1.40 from
+ * generating unnecessary movzbl's.
+ */
+#define	inb(port)	((u_char) u_int_inb(port))
+
+static inline u_int
+u_int_inb(u_int port)
+{
+	u_char	data;
+	/*
+	 * We use %%dx and not %1 here because i/o is done at %dx and not at
+	 * %edx, while gcc-2.2.2 generates inferior code (movw instead of movl)
+	 * if we tell it to load (u_short) port.
+	 */
+	__asm __volatile("inb %%dx,%0" : "=a" (data) : "d" (port));
+	return data;
+}
+
+static inline void
+outb(u_int port, u_char data)
+{
+	register u_char	al asm("ax");
+
+	al = data;		/* help gcc-1.40's register allocator */
+	__asm __volatile("outb %0,%%dx" : : "a" (al), "d" (port));
+}
+
+static inline void
+tlbflush()
+{
+	__asm __volatile("movl %%cr3, %%eax; movl %%eax, %%cr3" : : : "ax");
+}
+
+static inline u_long
+rcr2()
+{
+	u_long data;
+	__asm __volatile("movl %%cr2,%%eax" : "=a" (data));
+	return data;
+}
+
+#else /* not __GNUC__ */
+extern	void insque __P((void *, void *));
+extern	void remque __P((void *));
+
+int	bdb		__P((void));
+void	disable_intr	__P((void));
+void	enable_intr	__P((void));
+u_char	inb		__P((u_int port));
+void	outb		__P((u_int port, u_int data));	/* XXX - incompat */
+
+#endif	/* __GNUC__ */
+
+void	load_cr0	__P((u_int cr0));
+u_int	rcr0	__P((void));
+void load_cr3(u_long);
+u_long rcr3(void);
+
+void	setidt	__P((int, void (*)(), int, int));
+extern u_long kvtop(void *);
+extern void outw(int /*u_short*/, int /*u_short*/); /* XXX inline!*/
+extern void outsb(int /*u_short*/, void *, size_t);
+extern void outsw(int /*u_short*/, void *, size_t);
+extern void insw(int /*u_short*/, void *, size_t);
+extern void fillw(int /*u_short*/, void *, size_t);
+extern void filli(int, void *, size_t);
+
+#endif /* _MACHINE_CPUFUNC_H_ */