Initial source

1 files changed, 154 insertions, 0 deletions

diff --git a/chips/screen_switch.c b/chips/screen_switch.c
new file mode 100644
index 00000000..e216a534
--- /dev/null
+++ b/chips/screen_switch.c
@@ -0,0 +1,154 @@
+/* 
+ * Mach Operating System
+ * Copyright (c) 1991,1990,1989 Carnegie Mellon University
+ * All Rights Reserved.
+ * 
+ * Permission to use, copy, modify and distribute this software and its
+ * documentation is hereby granted, provided that both the copyright
+ * notice and this permission notice appear in all copies of the
+ * software, derivative works or modified versions, and any portions
+ * thereof, and that both notices appear in supporting documentation.
+ * 
+ * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
+ * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
+ * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
+ * 
+ * Carnegie Mellon requests users of this software to return to
+ * 
+ *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
+ *  School of Computer Science
+ *  Carnegie Mellon University
+ *  Pittsburgh PA 15213-3890
+ * 
+ * any improvements or extensions that they make and grant Carnegie Mellon
+ * the rights to redistribute these changes.
+ */
+/*
+ *	File: screen_switch.c
+ * 	Author: Alessandro Forin, Carnegie Mellon University
+ *	Date:	9/90
+ *
+ *	Autoconfiguration code for the Generic Screen Driver.
+ */
+
+#include <platforms.h>
+
+#if	defined(DECSTATION) || defined(FLAMINGO)
+#include <fb.h>
+#include <gx.h>
+#include <cfb.h>
+#include <mfb.h>
+#include <xcfb.h>
+#include <sfb.h>
+#endif
+
+#ifdef	VAXSTATION
+#define NGX 0
+#define NCFB 0
+#define NXCFB 0
+#endif
+
+#include <chips/screen_switch.h>
+
+/* When nothing needed */
+int screen_noop()
+{}
+
+/*
+ * Vector of graphic interface drivers to probe.
+ * Zero terminate this list.
+ */
+
+
+#if	NGX > 0
+extern int gq_probe(), gq_cold_init();
+extern unsigned int gq_mem_need();
+
+extern int ga_probe(), ga_cold_init();
+extern unsigned int ga_mem_need();
+#endif	/* NGX > 0 */
+
+#if	NCFB > 0
+extern int cfb_probe(), cfb_cold_init();
+extern unsigned int pm_mem_need();
+#endif	/* NCFB > 0 */
+
+#if	NMFB > 0
+extern int fb_probe(), fb_cold_init();
+extern unsigned int pm_mem_need();
+#endif	/* NMFB > 0 */
+
+#if	NXCFB > 0
+extern int xcfb_probe(), xcfb_cold_init();
+extern unsigned int pm_mem_need();
+#endif	/* NXCFB > 0 */
+
+#if	NSFB > 0
+extern int sfb_probe(), sfb_cold_init();
+extern unsigned int pm_mem_need();
+#endif	/* NSFB > 0 */
+
+#if	NFB > 0
+extern int pm_probe(), pm_cold_init();
+extern unsigned int pm_mem_need();
+#endif	/* NFB > 0 */
+
+struct screen_probe_vector screen_probe_vector[] = {
+
+#if	NGX > 0
+	gq_probe, gq_mem_need, gq_cold_init, /* 3max 3D color option */
+	ga_probe, ga_mem_need, ga_cold_init, /* 3max 2D color option */
+#endif	/* NGX > 0 */
+
+#if	NSFB > 0
+	sfb_probe, pm_mem_need, sfb_cold_init, /* Smart frame buffer */
+#endif	/* NSFB > 0 */
+
+#if	NMFB > 0
+	fb_probe, pm_mem_need, fb_cold_init, /* 3max/3min 1D(?) mono option */
+#endif	/* NMFB > 0 */
+
+#if	NCFB > 0
+	cfb_probe, pm_mem_need, cfb_cold_init, /* 3max 1D(?) color option */
+#endif	/* NCFB > 0 */
+
+#if	NXCFB > 0
+	xcfb_probe, pm_mem_need, xcfb_cold_init,/* MAXine frame buffer */
+#endif	/* NXCFB > 0 */
+
+#if	NFB > 0
+	pm_probe, pm_mem_need, pm_cold_init, /* "pm" mono/color (pmax) */
+#endif
+	0,
+};
+
+char	*screen_data;	/* opaque */
+
+int screen_find()
+{
+	struct screen_probe_vector *p = screen_probe_vector;
+	for (;p->probe; p++)
+		if ((*p->probe)()) {
+			(*p->setup)(0/*XXX*/, screen_data);
+			return 1;
+		}
+	return 0;
+}
+
+unsigned int
+screen_memory_alloc(avail)
+	char *avail;
+{
+	struct screen_probe_vector *p = screen_probe_vector;
+	int             size;
+	for (; p->probe; p++)
+		if ((*p->probe) ()) {
+			screen_data = avail;
+			size = (*p->alloc) ();
+			bzero(screen_data, size);
+			return size;
+		}
+	return 0;
+
+}
+