![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to cfb_hdw.c CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [GnuMach] / Gnu-Mach / chips|
Return to cfb_hdw.c CVS log | Up to [GnuMach] / Gnu-Mach / chips |
1.1 root 1: /*
2: * Mach Operating System
3: * Copyright (c) 1991,1990,1989 Carnegie Mellon University
4: * All Rights Reserved.
5: *
6: * Permission to use, copy, modify and distribute this software and its
7: * documentation is hereby granted, provided that both the copyright
8: * notice and this permission notice appear in all copies of the
9: * software, derivative works or modified versions, and any portions
10: * thereof, and that both notices appear in supporting documentation.
11: *
12: * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
13: * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
14: * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
15: *
16: * Carnegie Mellon requests users of this software to return to
17: *
18: * Software Distribution Coordinator or [email protected]
19: * School of Computer Science
20: * Carnegie Mellon University
21: * Pittsburgh PA 15213-3890
22: *
23: * any improvements or extensions that they make and grant Carnegie Mellon
24: * the rights to redistribute these changes.
25: */
26: /*
27: * File: cfb_hdw.c
28: * Author: Alessandro Forin, Carnegie Mellon University
29: * Date: 9/90
30: *
31: * Driver for the 3max Color Frame Buffer Display,
32: * hardware-level operations.
33: */
34:
35: #include <cfb.h>
36: #if (NCFB > 0)
37:
38: #include <platforms.h>
39:
40: #include <machine/machspl.h>
41: #include <mach/std_types.h>
42: #include <chips/busses.h>
43: #include <chips/screen_defs.h>
44: #include <chips/pm_defs.h>
45:
46: typedef pm_softc_t cfb_softc_t;
47:
48: #ifdef DECSTATION
49: #include <mips/PMAX/pmag_ba.h>
50: #include <mips/PMAX/tc.h>
51: #endif
52:
53: #ifdef FLAMINGO
54: #include <mips/PMAX/pmag_ba.h> /* XXX fixme */
55: #include <alpha/DEC/tc.h>
56: #endif
57:
58: /*
59: * Definition of the driver for the auto-configuration program.
60: */
61:
62: int cfb_probe(), cfb_intr();
63: static void cfb_attach();
64:
65: vm_offset_t cfb_std[NCFB] = { 0 };
66: struct bus_device *cfb_info[NCFB];
67: struct bus_driver cfb_driver =
68: { cfb_probe, 0, cfb_attach, 0, cfb_std, "cfb", cfb_info,
69: 0, 0, BUS_INTR_DISABLED};
70:
71: /*
72: * Probe/Attach functions
73: */
74:
75: cfb_probe( /* reg, ui */)
76: {
77: static probed_once = 0;
78:
79: /*
80: * Probing was really done sweeping the TC long ago
81: */
82: if (tc_probe("cfb") == 0)
83: return 0;
84: if (probed_once++ > 1)
85: printf("[mappable] ");
86: return 1;
87: }
88:
89: static void
90: cfb_attach(ui)
91: struct bus_device *ui;
92: {
93: /* ... */
94: printf(": color display");
95: }
96:
97:
98: /*
99: * Interrupt routine
100: */
101:
102: cfb_intr(unit,spllevel)
103: spl_t spllevel;
104: {
105: register volatile char *ack;
106:
107: /* acknowledge interrupt */
108: ack = (volatile char *) cfb_info[unit]->address + CFB_OFFSET_IREQ;
109: *ack = 0;
110:
111: #ifdef mips
112: splx(spllevel);
113: #endif
114: lk201_led(unit);
115: }
116:
117: cfb_vretrace(cfb, on)
118: cfb_softc_t *cfb;
119: {
120: int i;
121:
122: for (i = 0; i < NCFB; i++)
123: if (cfb_info[i]->address == (vm_offset_t)cfb->framebuffer)
124: break;
125: if (i == NCFB) return;
126:
127: (*tc_enable_interrupt)(cfb_info[i]->adaptor, on, 0);
128: }
129:
130: /*
131: * Boot time initialization: must make device
132: * usable as console asap.
133: */
134: extern int
135: cfb_soft_reset(), cfb_set_status(),
136: bt459_pos_cursor(), bt459_video_on(),
137: bt459_video_off(), cfb_vretrace(),
138: pm_get_status(), pm_char_paint(),
139: pm_insert_line(), pm_remove_line(),
140: pm_clear_bitmap(), pm_map_page();
141:
142: static struct screen_switch cfb_sw = {
143: screen_noop, /* graphic_open */
144: cfb_soft_reset, /* graphic_close */
145: cfb_set_status, /* set_status */
146: pm_get_status, /* get_status */
147: pm_char_paint, /* char_paint */
148: bt459_pos_cursor, /* pos_cursor */
149: pm_insert_line, /* insert_line */
150: pm_remove_line, /* remove_line */
151: pm_clear_bitmap, /* clear_bitmap */
152: bt459_video_on, /* video_on */
153: bt459_video_off, /* video_off */
154: cfb_vretrace, /* intr_enable */
155: pm_map_page /* map_page */
156: };
157:
158: cfb_cold_init(unit, up)
159: user_info_t *up;
160: {
161: cfb_softc_t *cfb;
162: screen_softc_t sc = screen(unit);
163: int base = tc_probe("cfb");
164:
165: bcopy(&cfb_sw, &sc->sw, sizeof(sc->sw));
166: sc->flags |= COLOR_SCREEN;
167: sc->frame_scanline_width = 1024;
168: sc->frame_height = 1024;
169: sc->frame_visible_width = 1024;
170: sc->frame_visible_height = 864;
171:
172: pm_init_screen_params(sc,up);
173: (void) screen_up(unit, up);
174:
175: cfb = pm_alloc(unit, base + CFB_OFFSET_BT459, base + CFB_OFFSET_VRAM, -1);
176:
177: screen_default_colors(up);
178:
179: cfb_soft_reset(sc);
180:
181: /*
182: * Clearing the screen at boot saves from scrolling
183: * much, and speeds up booting quite a bit.
184: */
185: screen_blitc( unit, 'C'-'@');/* clear screen */
186: }
187:
188: #endif (NCFB > 0)
This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.