1 files changed, 52 insertions, 0 deletions
diff --git a/viengoos/ia32-shutdown.c b/viengoos/ia32-shutdown.c
new file mode 100644
index 0000000..9aa9804
--- /dev/null
+++ b/viengoos/ia32-shutdown.c
@@ -0,0 +1,52 @@
+/* ia32-shutdown.c - Shutdown routines for the ia32.
+   Copyright (C) 2003 Free Software Foundation, Inc.
+   Written by Marcus Brinkmann.
+
+   This file is part of the GNU Hurd.
+
+   The GNU Hurd is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
+
+   The GNU Hurd is distributed in the hope that it will be useful, but
+   WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA. */
+
+#if HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <sys/io.h>
+
+#include "shutdown.h"
+
+
+/* There are three ways to reset an ia32 machine.  The first way is to
+   make the corresponding BIOS call in real mode.  The second way is
+   to program the keyboard controller to do it.  The third way is to
+   triple fault the CPU by using an empty IDT and then causing a
+   fault.  Any of these can fail on odd hardware.  */
+void
+reset (void)
+{
+  /* We only try to program the keyboard controller.  But if that
+     fails, we should try to triple fault.  Alternatively, we could
+     also try to make the BIOS call.  */
+
+  outb_p (0x80, 0x70);
+  inb_p (0x71);
+
+  while (inb (0x64) & 0x02)
+    ;
+
+  outb_p (0x8F, 0x70);
+  outb_p (0x00, 0x71);
+
+  outb_p (0xFE, 0x64);
+}