initial import of NetBSD tree

1 files changed, 73 insertions, 0 deletions

diff --git a/sys/arch/sparc/dev/btvar.h b/sys/arch/sparc/dev/btvar.h
new file mode 100644
index 00000000000..68be1189422
--- /dev/null
+++ b/sys/arch/sparc/dev/btvar.h
@@ -0,0 +1,73 @@
+/*	$NetBSD: btvar.h,v 1.2 1994/11/20 20:51:56 deraadt Exp $ */
+
+/*
+ * Copyright (c) 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This software was developed by the Computer Systems Engineering group
+ * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
+ * contributed to Berkeley.
+ *
+ * All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Lawrence Berkeley Laboratory.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	@(#)btvar.h	8.2 (Berkeley) 1/21/94
+ */
+
+/*
+ * Brooktree color frame buffer state variables (see btreg.h).
+ *
+ * Unfortunately, remarkably little code can be shared between the
+ * cg3 and cg6 drivers here, as the cg3 registers do longword-ops
+ * `as expected', but the cg6 ones use only the upper byte.
+ *
+ * Still, the software color map manipulation is not completely trivial.
+ */
+union bt_cmap {
+	u_char  cm_map[256][3];		/* 256 R/G/B entries */
+	u_int   cm_chip[256 * 3 / 4];	/* the way the chip gets loaded */
+};
+
+/*
+ * Routines in bt_subr.c.
+ */
+int	bt_getcmap __P((struct fbcmap *, union bt_cmap *, int));
+int	bt_putcmap __P((struct fbcmap *, union bt_cmap *, int));
+
+/*
+ * Compute (x / 4) * 3 and (x / 4) * 4.  These are used in turning
+ * RGB indices (which are in multiples of three) into `chip RGB' values
+ * (which are in multiples of four).
+ */
+#define	BT_D4M3(x) ((((x) >> 2) << 1) + ((x) >> 2))	/* (x / 4) * 3 */
+#define	BT_D4M4(x) ((x) & ~3)				/* (x / 4) * 4 */