1 files changed, 54 insertions, 0 deletions
diff --git a/contrib/libdha/sysdep/pci_linux.c b/contrib/libdha/sysdep/pci_linux.c
new file mode 100644
index 000000000..1d2116da6
--- /dev/null
+++ b/contrib/libdha/sysdep/pci_linux.c
@@ -0,0 +1,54 @@
+/*
+   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 <errno.h>
+#ifdef __i386__
+#include <sys/perm.h>
+#else
+#ifndef __sparc__
+#include <sys/io.h>
+#endif
+#endif
+
+#include "config.h"
+
+#ifdef CONFIG_DHAHELPER
+#include <fcntl.h>
+int dhahelper_initialized = 0;
+int dhahelper_fd = 0;
+#endif
+
+#if defined(__sparc__) || defined(__powerpc__)
+#define iopl(x) (0)
+#endif
+
+static __inline__ int enable_os_io(void)
+{
+#ifdef CONFIG_DHAHELPER
+    dhahelper_fd = open("/dev/dhahelper", O_RDWR);
+    if (dhahelper_fd > 0)
+    {
+	dhahelper_initialized = 1;
+	return(0);
+    }
+    dhahelper_initialized = -1;
+#endif
+
+    if (iopl(3) != 0)
+	return(errno);
+    return(0);
+}
+
+static __inline__ int disable_os_io(void)
+{
+#ifdef CONFIG_DHAHELPER
+    if (dhahelper_initialized == 1)
+	close(dhahelper_fd);
+    else
+#endif
+    if (iopl(0) != 0)
+	return(errno);
+    return(0);
+}