Init

sys/sun/consfb.c

@@ -0,0 +1,76 @@
+#ifndef lint
+static	char sccsid[] = "@(#)consfb.c 1.1 94/10/31 Copyr 1983 Sun Micro";
+#endif
+
+/*
+ * Copyright (c) 1983 by Sun Microsystems, Inc.
+ */
+
+/*
+ * Console frame buffer driver for Sun.
+ *
+ * Indirects to fbdev found during autoconf.
+ */
+
+#include <machine/pte.h>
+
+#include <sys/param.h>
+#include <sys/conf.h>
+#include <sys/user.h>
+#include <sys/ioctl.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/buf.h>
+#include <sys/vmmac.h>
+#include <sys/uio.h>
+#include <sys/proc.h>
+
+dev_t	fbdev = -1;
+
+/*
+ * If we have a frame buffer device, then its major and minor device
+ * numbers have been placed in the global variable "fbdev" allocated
+ * above. So, when someone opens /dev/fb, redirect the device reference
+ * to the "primary" frame buffer.
+ */
+
+/*ARGSUSED*/
+consfbopen(dev, flag, ndev)
+	dev_t dev, *ndev;
+{
+	if ((fbdev == -1) || (fbdev == dev))
+		return (ENXIO);
+	*ndev = fbdev;
+	return (EAGAIN);
+}
+
+/*
+ * The remaining entry points should never be called, but are
+ * provided so that consfb.o can be linked in to kernels that
+ * requre them. If they get called, then spec_open did not
+ * properly redirect the device open to the new device.
+ */
+
+/*ARGSUSED*/
+consfbclose(dev, flag)
+	dev_t dev;
+{
+	panic ("consfbclose");
+}
+
+/*ARGSUSED*/
+consfbioctl(dev, cmd, data, flag)
+	dev_t dev;
+	caddr_t data;
+{
+	panic ("consfbioctl");
+}
+
+/*ARGSUSED*/
+consfbmmap(dev, off, prot)
+	dev_t dev;
+	off_t off;
+	int prot;
+{
+	panic ("consfbmmap");
+}