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      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 
     41 void init_cons(void)
     42 {
     43 	cons_start = (char *)atdevbase + (0xB8000 - IOM_BEGIN);
     44 	cons_x = 0;
     45 	cons_y = 0;
     46 }
     47 
     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 
     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 
     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 
     98 void print(char *buf)
     99 {
    100 	print_ext(WHITE_ON_BLACK, buf);
    101 }
    102 
    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 
    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