1 /* $NetBSD: console.c,v 1.7 2021/05/04 21:09:16 khorben Exp $ */
2
3 /*
4 * Copyright (c) 2017-2020 The NetBSD Foundation, Inc. All rights reserved.
5 *
6 * This code is derived from software contributed to The NetBSD Foundation
7 * by Maxime Villard.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
19 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
20 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
21 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
22 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
28 * POSSIBILITY OF SUCH DAMAGE.
29 */
30
31 #include "prekern.h"
32
33 extern vaddr_t atdevbase;
34 #define CONS_WID 80
35 #define CONS_HEI 25
36
37 static char *cons_start;
38 static size_t cons_x, cons_y;
39 static char cons_buffer[CONS_WID * 2 * CONS_HEI];
40
init_cons(void)41 void init_cons(void)
42 {
43 cons_start = (char *)atdevbase + (0xB8000 - IOM_BEGIN);
44 cons_x = 0;
45 cons_y = 0;
46 }
47
check_scroll(void)48 static void check_scroll(void)
49 {
50 char *src, *dst;
51 size_t i;
52
53 if (cons_y != CONS_HEI)
54 return;
55
56 for (i = 0; i < CONS_HEI-1; i++) {
57 dst = &cons_buffer[0] + i * (CONS_WID * 2);
58 src = &cons_buffer[0] + (i + 1) * (CONS_WID * 2);
59 memcpy(dst, src, (CONS_WID * 2));
60 }
61 memset(&cons_buffer[0] + (CONS_WID * 2) * (CONS_HEI-1), 0,
62 (CONS_WID * 2));
63 cons_y--;
64 memcpy(cons_start, &cons_buffer[0], CONS_WID * 2 * CONS_HEI);
65 }
66
putc(int color,char c)67 static void putc(int color, char c)
68 {
69 char *ptr, *scr;
70
71 if (c == '\n') {
72 cons_x = 0;
73 cons_y++;
74 check_scroll();
75 } else {
76 if (cons_x + 1 == CONS_WID) {
77 cons_x = 0;
78 cons_y++;
79 check_scroll();
80 }
81 ptr = (cons_start + 2 * cons_x + 160 * cons_y);
82 scr = (cons_buffer + 2 * cons_x + 160 * cons_y);
83 ptr[0] = scr[0] = c;
84 ptr[1] = scr[1] = color;
85 cons_x++;
86 }
87 }
88
print_ext(int color,char * buf)89 void print_ext(int color, char *buf)
90 {
91 size_t i;
92
93 for (i = 0; buf[i] != '\0'; i++) {
94 putc(color, buf[i]);
95 }
96 }
97
print(char * buf)98 void print(char *buf)
99 {
100 print_ext(WHITE_ON_BLACK, buf);
101 }
102
print_state(state_t state,char * buf)103 void print_state(state_t state, char *buf)
104 {
105 print("[");
106 switch (state)
107 {
108 case STATE_NORMAL:
109 print_ext(GREEN_ON_BLACK, "+");
110 break;
111 case STATE_ERROR:
112 print_ext(RED_ON_BLACK, "!");
113 break;
114 case STATE_WARNING:
115 print_ext(YELLOW_ON_BLACK, "*");
116 break;
117 default:
118 print_ext(WHITE_ON_BLACK, "?");
119 break;
120 }
121 print("] ");
122 print(buf);
123 print("\n");
124 }
125
print_banner(void)126 void print_banner(void)
127 {
128 char *banner =
129 " __________ __ \n"
130 " \\______ \\_______ ____ | | __ ___________ ____ \n"
131 " | ___/\\_ __ \\_/ __ \\| |/ // __ \\_ __ \\/ \\ \n"
132 " | | | | \\/\\ ___/| <\\ ___/| | \\/ | \\\n"
133 " |____| |__| \\___ >__|_ \\\\___ >__| |___| /\n"
134 " \\/ \\/ \\/ \\/ Version 1.0\n"
135 ;
136 print(banner);
137 }
138