1 files changed, 30 insertions, 0 deletions
diff --git a/libdha/sysdep/pci_isc.c b/libdha/sysdep/pci_isc.c
new file mode 100644
index 0000000000..0fabba5972
--- /dev/null
+++ b/libdha/sysdep/pci_isc.c
@@ -0,0 +1,30 @@
+/*
+   This file is based on:
+   $XFree86: xc/programs/Xserver/hw/xfree86/etc/scanpci.c,v 3.34.2.17 1998/11/10 11:55:40 dawes Exp $
+   Modified for readability by Nick Kurshev
+*/
+#include <sys/param.h>
+#include <sys/immu.h>
+#include <sys/region.h>
+#include <sys/proc.h>
+#include <sys/tss.h>
+#include <sys/sysi86.h>
+#include <sys/v86.h>
+
+static __inline__ void enable_os_io(void)
+{
+#if defined(SI86IOPL)
+    sysi86(SI86IOPL, 3);
+#else
+    sysi86(SI86V86, V86SC_IOPL, PS_IOPL);
+#endif
+}
+
+static __inline__ void disable_os_io(void)
+{
+#if defined(SI86IOPL)
+    sysi86(SI86IOPL, 0);
+#else
+    sysi86(SI86V86, V86SC_IOPL, 0);
+#endif
+}