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console.c revision 1.1 
      1 /*	$NetBSD: console.c,v 1.1 2017/10/10 09:29:14 maxv Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2017 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()
     42 {
     43 	cons_start = (char *)atdevbase + (0xB8000 - IOM_BEGIN);
     44 	cons_x = 0;
     45 	cons_y = 0;
     46 }
     47 
     48 static void check_scroll()
     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-1));
     65 }
     66 
     67 void print_ext(int color, char *buf)
     68 {
     69 	char *ptr, *scr;
     70 	size_t i;
     71 
     72 	for (i = 0; buf[i] != '\0'; i++) {
     73 		if (buf[i] == '\n') {
     74 			cons_x = 0;
     75 			cons_y++;
     76 			check_scroll();
     77 		} else {
     78 			if (cons_x + 1 == CONS_WID) {
     79 				cons_x = 0;
     80 				cons_y++;
     81 				check_scroll();
     82 			}
     83 			ptr = (cons_start + 2 * cons_x + 160 * cons_y);
     84 			scr = (cons_buffer + 2 * cons_x + 160 * cons_y);
     85 			ptr[0] = scr[0] = buf[i];
     86 			ptr[1] = scr[1] = color;
     87 			cons_x++;
     88 		}
     89 	}
     90 }
     91 
     92 void print(char *buf)
     93 {
     94 	print_ext(WHITE_ON_BLACK, buf);
     95 }
     96 
     97 void print_state(bool ok, char *buf)
     98 {
     99 	print("[");
    100 	if (ok)
    101 		print_ext(GREEN_ON_BLACK, "+");
    102 	else
    103 		print_ext(RED_ON_BLACK, "!");
    104 	print("] ");
    105 	print(buf);
    106 	print("\n");
    107 }
    108 
    109 void print_banner()
    110 {
    111 	char *banner =
    112 		"           __________                 __                        \n"
    113 		"           \\______   \\_______   ____ |  | __ ___________  ____  \n"
    114 		"            |     ___/\\_  __ \\_/ __ \\|  |/ // __ \\_  __ \\/    \\ \n"
    115 		"            |    |     |  | \\/\\  ___/|    <\\  ___/|  | \\/   |  \\\n"
    116 		"            |____|     |__|    \\___  >__|_ \\\\___  >__|  |___|  /\n"
    117 		"                                   \\/     \\/    \\/           \\/    Version 1.0\n"
    118 	;
    119 	print(banner);
    120 }
    121