1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1995-1998 Søren Schmidt
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer,
12 * without modification, immediately at the beginning of the file.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. The name of the author may not be used to endorse or promote products
17 * derived from this software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31 #include <sys/param.h>
32 #include <sys/systm.h>
33 #include <sys/module.h>
34 #include <sys/malloc.h>
35 #include <sys/kernel.h>
36 #include <sys/sysctl.h>
37 #include <sys/consio.h>
38 #include <sys/fbio.h>
39 #include <sys/resourcevar.h>
40 #include <sys/smp.h>
41
42 #include <machine/pc/display.h>
43
44 #include <dev/fb/fbreg.h>
45 #include <dev/fb/splashreg.h>
46 #include <dev/syscons/syscons.h>
47
48 static u_char *message;
49 static int *messagep;
50 static int messagelen;
51 static int blanked;
52
53 #define MSGBUF_LEN 70
54
55 static int nofancy = 0;
56 TUNABLE_INT("hw.syscons.saver_snake_nofancy", &nofancy);
57
58 #define FANCY_SNAKE (!nofancy)
59 #define LOAD_HIGH(ld) (((ld * 100 + FSCALE / 2) >> FSHIFT) / 100)
60 #define LOAD_LOW(ld) (((ld * 100 + FSCALE / 2) >> FSHIFT) % 100)
61
62 static inline void update_msg(void);
63
64 static int
snake_saver(video_adapter_t * adp,int blank)65 snake_saver(video_adapter_t *adp, int blank)
66 {
67 static int dirx, diry;
68 int f, color, load;
69 sc_softc_t *sc;
70 scr_stat *scp;
71
72 /* XXX hack for minimal changes. */
73 #define save message
74 #define savs messagep
75
76 sc = sc_find_softc(adp, NULL);
77 if (sc == NULL)
78 return EAGAIN;
79 scp = sc->cur_scp;
80
81 if (blank) {
82 if (adp->va_info.vi_flags & V_INFO_GRAPHICS)
83 return EAGAIN;
84 if (blanked <= 0) {
85 sc_vtb_clear(&scp->scr, sc->scr_map[0x20],
86 (FG_LIGHTGREY | BG_BLACK) << 8);
87 vidd_set_hw_cursor(adp, -1, -1);
88 sc_set_border(scp, 0);
89 dirx = (scp->xpos ? 1 : -1);
90 diry = (scp->ypos ?
91 scp->xsize : -scp->xsize);
92 for (f=0; f< messagelen; f++)
93 savs[f] = scp->xpos + scp->ypos*scp->xsize;
94 sc_vtb_putc(&scp->scr, savs[0], sc->scr_map[*save],
95 (FG_LIGHTGREY | BG_BLACK) << 8);
96 blanked = 1;
97 }
98 if (blanked++ < 4)
99 return 0;
100 blanked = 1;
101 sc_vtb_putc(&scp->scr, savs[messagelen - 1], sc->scr_map[0x20],
102 (FG_LIGHTGREY | BG_BLACK) << 8);
103 for (f=messagelen-1; f > 0; f--)
104 savs[f] = savs[f-1];
105 f = savs[0];
106 if ((f % scp->xsize) == 0 ||
107 (f % scp->xsize) == scp->xsize - 1 ||
108 (random() % 50) == 0)
109 dirx = -dirx;
110 if ((f / scp->xsize) == 0 ||
111 (f / scp->xsize) == scp->ysize - 1 ||
112 (random() % 20) == 0)
113 diry = -diry;
114 savs[0] += dirx + diry;
115 if (FANCY_SNAKE) {
116 update_msg();
117 load = ((averunnable.ldavg[0] * 100 + FSCALE / 2) >> FSHIFT);
118 if (load == 0)
119 color = FG_LIGHTGREY | BG_BLACK;
120 else if (load / mp_ncpus <= 50)
121 color = FG_LIGHTGREEN | BG_BLACK;
122 else if (load / mp_ncpus <= 75)
123 color = FG_YELLOW | BG_BLACK;
124 else if (load / mp_ncpus <= 99)
125 color = FG_LIGHTRED | BG_BLACK;
126 else
127 color = FG_RED | FG_BLINK | BG_BLACK;
128 } else
129 color = FG_LIGHTGREY | BG_BLACK;
130
131 for (f=messagelen-1; f>=0; f--)
132 sc_vtb_putc(&scp->scr, savs[f], sc->scr_map[save[f]],
133 color << 8);
134 } else
135 blanked = 0;
136
137 return 0;
138 }
139
140 static inline void
update_msg(void)141 update_msg(void)
142 {
143 if (!FANCY_SNAKE) {
144 messagelen = sprintf(message, "%s %s", ostype, osrelease);
145 return;
146 }
147 messagelen = snprintf(message, MSGBUF_LEN,
148 "%s %s (%d.%02d %d.%02d, %d.%02d)",
149 ostype, osrelease,
150 LOAD_HIGH(averunnable.ldavg[0]), LOAD_LOW(averunnable.ldavg[0]),
151 LOAD_HIGH(averunnable.ldavg[1]), LOAD_LOW(averunnable.ldavg[1]),
152 LOAD_HIGH(averunnable.ldavg[2]), LOAD_LOW(averunnable.ldavg[2]));
153 }
154
155 static int
snake_init(video_adapter_t * adp)156 snake_init(video_adapter_t *adp)
157 {
158 message = malloc(MSGBUF_LEN, M_DEVBUF, M_WAITOK);
159 messagep = malloc(MSGBUF_LEN * sizeof *messagep, M_DEVBUF, M_WAITOK);
160 update_msg();
161 return 0;
162 }
163
164 static int
snake_term(video_adapter_t * adp)165 snake_term(video_adapter_t *adp)
166 {
167 free(message, M_DEVBUF);
168 free(messagep, M_DEVBUF);
169 return 0;
170 }
171
172 static scrn_saver_t snake_module = {
173 "snake_saver", snake_init, snake_term, snake_saver, NULL,
174 };
175
176 SAVER_MODULE(snake_saver, snake_module);
177