1 files changed, 75 insertions, 0 deletions
diff --git a/xorg-server/hw/xfree86/os-support/shared/bios_devmem.c b/xorg-server/hw/xfree86/os-support/shared/bios_devmem.c
new file mode 100644
index 000000000..7288239be
--- /dev/null
+++ b/xorg-server/hw/xfree86/os-support/shared/bios_devmem.c
@@ -0,0 +1,75 @@
+/*
+ * Copyright 1993 by David Wexelblat <dwex@goblin.org>
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation, and that the name of David Wexelblat not be used in
+ * advertising or publicity pertaining to distribution of the software without
+ * specific, written prior permission.  David Wexelblat makes no representations
+ * about the suitability of this software for any purpose.  It is provided
+ * "as is" without express or implied warranty.
+ *
+ * DAVID WEXELBLAT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL DAVID WEXELBLAT BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+
+#ifdef HAVE_XORG_CONFIG_H
+#include <xorg-config.h>
+#endif
+
+#include <X11/X.h>
+#include "xf86.h"
+#include "xf86Priv.h"
+#include "xf86_OSlib.h"
+#include <string.h>
+
+/*
+ * Read BIOS via /dev/mem.
+ */
+
+#ifndef DEV_MEM
+# define DEV_MEM "/dev/mem"
+#endif
+
+_X_EXPORT int
+xf86ReadBIOS(unsigned long Base, unsigned long Offset, unsigned char *Buf,
+		int Len)
+{
+ 	int fd;
+
+#ifdef __ia64__
+	if ((fd = open(DEV_MEM, O_RDONLY | O_SYNC)) < 0)
+#else
+ 	if ((fd = open(DEV_MEM, O_RDONLY)) < 0)
+#endif
+	{
+		xf86Msg(X_WARNING, "xf86ReadBIOS: Failed to open %s (%s)\n",
+			DEV_MEM, strerror(errno));
+		return(-1);
+	}
+
+	if (lseek(fd, (Base+Offset), SEEK_SET) < 0)
+	{
+		xf86Msg(X_WARNING, "xf86ReadBIOS: %s seek failed (%s)\n",
+			DEV_MEM, strerror(errno));
+		close(fd);
+		return(-1);
+	}
+	if (read(fd, Buf, Len) != Len)
+	{
+		xf86Msg(X_WARNING, "xf86ReadBIOS: %s read failed (%s)\n",
+			DEV_MEM, strerror(errno));
+		close(fd);
+		return(-1);
+	}
+	close(fd);
+	return(Len);
+}