summaryrefslogtreecommitdiff
path: root/chips/screen_switch.h
diff options
context:
space:
mode:
authorThomas Bushnell <thomas@gnu.org>1997-02-25 21:28:37 +0000
committerThomas Bushnell <thomas@gnu.org>1997-02-25 21:28:37 +0000
commitf07a4c844da9f0ecae5bbee1ab94be56505f26f7 (patch)
tree12b07c7e578fc1a5f53dbfde2632408491ff2a70 /chips/screen_switch.h
Initial source
Diffstat (limited to 'chips/screen_switch.h')
-rw-r--r--chips/screen_switch.h85
1 files changed, 85 insertions, 0 deletions
diff --git a/chips/screen_switch.h b/chips/screen_switch.h
new file mode 100644
index 0000000..a84b4e7
--- /dev/null
+++ b/chips/screen_switch.h
@@ -0,0 +1,85 @@
+/*
+ * 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.h
+ * Author: Alessandro Forin, Carnegie Mellon University
+ * Date: 10/90
+ *
+ * Definitions of things that must be tailored to
+ * specific hardware boards for the Generic Screen Driver.
+ */
+
+#ifndef SCREEN_SWITCH_H
+#define SCREEN_SWITCH_H 1
+
+/*
+ * List of probe routines, scanned at cold-boot time
+ * to see which, if any, graphic display is available.
+ * This is done before autoconf, so that printing on
+ * the console works early on. The alloc routine is
+ * called only on the first device that answers.
+ * Ditto for the setup routine, called later on.
+ */
+struct screen_probe_vector {
+ int (*probe)();
+ unsigned int (*alloc)();
+ int (*setup)();
+};
+
+/*
+ * Low-level operations on the graphic device, used
+ * by the otherwise device-independent interface code
+ */
+struct screen_switch {
+ int (*graphic_open)(); /* when X11 opens */
+ int (*graphic_close)(); /* .. or closes */
+ int (*set_status)(); /* dev-specific ops */
+ int (*get_status)(); /* dev-specific ops */
+ int (*char_paint)(); /* blitc */
+ int (*pos_cursor)(); /* cursor positioning */
+ int (*insert_line)(); /* ..and scroll down */
+ int (*remove_line)(); /* ..and scroll up */
+ int (*clear_bitmap)(); /* blank screen */
+ int (*video_on)(); /* screen saver */
+ int (*video_off)();
+ int (*intr_enable)();
+ int (*map_page)(); /* user-space mapping */
+};
+
+/*
+ * Each graphic device needs page-aligned memory
+ * to be mapped in user space later (for events
+ * and such). Size and content of this memory
+ * is unfortunately device-dependent, even if
+ * it did not need to (puns).
+ */
+extern char *screen_data;
+
+extern struct screen_probe_vector screen_probe_vector[];
+
+extern int screen_noop(), screen_find();
+
+#endif SCREEN_SWITCH_H