140 lines
2.9 KiB
C
140 lines
2.9 KiB
C
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#include "kernel.h"
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#include <minix/minlib.h>
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#include <minix/const.h>
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#include <minix/cpufeature.h>
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#include <minix/type.h>
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#include <minix/com.h>
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#include <sys/types.h>
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#include <sys/param.h>
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#include <machine/partition.h>
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#include <libexec.h>
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#include "string.h"
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#include "arch_proto.h"
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#include "libexec.h"
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#include "direct_utils.h"
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#include "serial.h"
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#include "glo.h"
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#include <machine/multiboot.h>
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/* Give non-zero values to avoid them in BSS */
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static int print_line = 1, print_col = 1;
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#include <sys/video.h>
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extern char *video_mem;
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#define VIDOFFSET(line, col) ((line) * MULTIBOOT_CONSOLE_COLS * 2 + (col) * 2)
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#define VIDSIZE VIDOFFSET(MULTIBOOT_CONSOLE_LINES-1,MULTIBOOT_CONSOLE_COLS-1)
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void direct_put_char(char c, int line, int col)
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{
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int offset = VIDOFFSET(line, col);
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video_mem[offset] = c;
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video_mem[offset+1] = 0x07; /* grey-on-black */
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}
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static char direct_get_char(int line, int col)
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{
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return video_mem[VIDOFFSET(line, col)];
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}
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void direct_cls(void)
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{
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/* Clear screen */
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int i,j;
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for(i = 0; i < MULTIBOOT_CONSOLE_COLS; i++)
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for(j = 0; j < MULTIBOOT_CONSOLE_LINES; j++)
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direct_put_char(' ', j, i);
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print_line = print_col = 0;
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/* Tell video hardware origin is 0. */
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outb(C_6845+INDEX, VID_ORG);
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outb(C_6845+DATA, 0);
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outb(C_6845+INDEX, VID_ORG+1);
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outb(C_6845+DATA, 0);
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}
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static void direct_scroll_up(int lines)
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{
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int i, j;
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for (i = 0; i < MULTIBOOT_CONSOLE_LINES; i++ ) {
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for (j = 0; j < MULTIBOOT_CONSOLE_COLS; j++ ) {
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char c = 0;
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if(i < MULTIBOOT_CONSOLE_LINES-lines)
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c = direct_get_char(i + lines, j);
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direct_put_char(c, i, j);
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}
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}
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print_line-= lines;
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}
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void direct_print_char(char c)
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{
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while (print_line >= MULTIBOOT_CONSOLE_LINES)
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direct_scroll_up(1);
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#define TABWIDTH 8
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if(c == '\t') {
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if(print_col >= MULTIBOOT_CONSOLE_COLS - TABWIDTH) {
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c = '\n';
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} else {
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do {
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direct_put_char(' ', print_line, print_col++);
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} while(print_col % TABWIDTH);
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return;
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}
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}
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if (c == '\n') {
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while (print_col < MULTIBOOT_CONSOLE_COLS)
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direct_put_char(' ', print_line, print_col++);
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print_line++;
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print_col = 0;
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return;
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}
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direct_put_char(c, print_line, print_col++);
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if (print_col >= MULTIBOOT_CONSOLE_COLS) {
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print_line++;
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print_col = 0;
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}
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while (print_line >= MULTIBOOT_CONSOLE_LINES)
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direct_scroll_up(1);
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}
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void direct_print(const char *str)
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{
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while (*str) {
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direct_print_char(*str);
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str++;
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}
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}
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/* Standard and AT keyboard. (PS/2 MCA implies AT throughout.) */
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#define KEYBD 0x60 /* I/O port for keyboard data */
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#define KB_STATUS 0x64 /* I/O port for status on AT */
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#define KB_OUT_FULL 0x01 /* status bit set when keypress char pending */
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#define KB_AUX_BYTE 0x20 /* Auxiliary Device Output Buffer Full */
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int direct_read_char(unsigned char *ch)
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{
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unsigned long sb;
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sb = inb(KB_STATUS);
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if (!(sb & KB_OUT_FULL)) {
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return 0;
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}
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inb(KEYBD);
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if (!(sb & KB_AUX_BYTE))
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return 1;
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return 0;
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}
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