Mercurial > lcfOS

annotate cos/kernel/video.c @ 278:9fca39eebe50

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
First implementation of regalloc with coalsesc
author Windel Bouwman
date Sun, 29 Sep 2013 14:08:15 +0200
parents d8627924d40d
children
rev   line source
9
92ace1ca50a8 64 bits kernel without interrupts but with printf in C
windel
parents:
diff changeset
1 #include "kernel.h"
92ace1ca50a8 64 bits kernel without interrupts but with printf in C
windel
parents:
diff changeset
2
92ace1ca50a8 64 bits kernel without interrupts but with printf in C
windel
parents:
diff changeset
3 #define VIDMEM 0xB8000
92ace1ca50a8 64 bits kernel without interrupts but with printf in C
windel
parents:
diff changeset
4
92ace1ca50a8 64 bits kernel without interrupts but with printf in C
windel
parents:
diff changeset
5 #define NUM_COLS 80
92ace1ca50a8 64 bits kernel without interrupts but with printf in C
windel
parents:
diff changeset
6 #define NUM_ROWS 25
92ace1ca50a8 64 bits kernel without interrupts but with printf in C
windel
parents:
diff changeset
7 #define SCREEN_SIZE (NUM_COLS * NUM_ROWS)
92ace1ca50a8 64 bits kernel without interrupts but with printf in C
windel
parents:
diff changeset
8
92ace1ca50a8 64 bits kernel without interrupts but with printf in C
windel
parents:
diff changeset
9 static int row, col;
23
5dd47d6eebac Added ubersimple malloc algorithm
windel
parents: 18
diff changeset
10 uint8_t video_color = 0x1F;
9
92ace1ca50a8 64 bits kernel without interrupts but with printf in C
windel
parents:
diff changeset
11
18
6129643f5c34 Fixed interrupt issue, ds, es, ss, fs and gs were not initialized to 0
windel
parents: 9
diff changeset
12 void move_cursor()
6129643f5c34 Fixed interrupt issue, ds, es, ss, fs and gs were not initialized to 0
windel
parents: 9
diff changeset
13 {
6129643f5c34 Fixed interrupt issue, ds, es, ss, fs and gs were not initialized to 0
windel
parents: 9
diff changeset
14 uint16_t cursorLocation = row * 80 + col;
6129643f5c34 Fixed interrupt issue, ds, es, ss, fs and gs were not initialized to 0
windel
parents: 9
diff changeset
15 outb(0x3D4, 14);
6129643f5c34 Fixed interrupt issue, ds, es, ss, fs and gs were not initialized to 0
windel
parents: 9
diff changeset
16 outb(0x3D5, cursorLocation >> 8);
6129643f5c34 Fixed interrupt issue, ds, es, ss, fs and gs were not initialized to 0
windel
parents: 9
diff changeset
17 outb(0x3D4, 15);
6129643f5c34 Fixed interrupt issue, ds, es, ss, fs and gs were not initialized to 0
windel
parents: 9
diff changeset
18 outb(0x3D5, cursorLocation & 0xFF);
6129643f5c34 Fixed interrupt issue, ds, es, ss, fs and gs were not initialized to 0
windel
parents: 9
diff changeset
19 }
6129643f5c34 Fixed interrupt issue, ds, es, ss, fs and gs were not initialized to 0
windel
parents: 9
diff changeset
20
24
d8627924d40d Split up in more files and reboot command
windel
parents: 23
diff changeset
21 void set_cursor(int newrow, int newcol)
d8627924d40d Split up in more files and reboot command
windel
parents: 23
diff changeset
22 {
d8627924d40d Split up in more files and reboot command
windel
parents: 23
diff changeset
23 row = newrow;
d8627924d40d Split up in more files and reboot command
windel
parents: 23
diff changeset
24 col = newcol;
d8627924d40d Split up in more files and reboot command
windel
parents: 23
diff changeset
25 move_cursor();
d8627924d40d Split up in more files and reboot command
windel
parents: 23
diff changeset
26 }
d8627924d40d Split up in more files and reboot command
windel
parents: 23
diff changeset
27
d8627924d40d Split up in more files and reboot command
windel
parents: 23
diff changeset
28 void get_cursor(int *therow, int *thecol)
d8627924d40d Split up in more files and reboot command
windel
parents: 23
diff changeset
29 {
d8627924d40d Split up in more files and reboot command
windel
parents: 23
diff changeset
30 *therow = row;
d8627924d40d Split up in more files and reboot command
windel
parents: 23
diff changeset
31 *thecol = col;
d8627924d40d Split up in more files and reboot command
windel
parents: 23
diff changeset
32 }
d8627924d40d Split up in more files and reboot command
windel
parents: 23
diff changeset
33
d8627924d40d Split up in more files and reboot command
windel
parents: 23
diff changeset
34 void set_color(int forecolor, int backcolor)
d8627924d40d Split up in more files and reboot command
windel
parents: 23
diff changeset
35 {
d8627924d40d Split up in more files and reboot command
windel
parents: 23
diff changeset
36 video_color = forecolor | (backcolor << 4);
d8627924d40d Split up in more files and reboot command
windel
parents: 23
diff changeset
37 }
d8627924d40d Split up in more files and reboot command
windel
parents: 23
diff changeset
38
d8627924d40d Split up in more files and reboot command
windel
parents: 23
diff changeset
39 void clear_screen()
9
92ace1ca50a8 64 bits kernel without interrupts but with printf in C
windel
parents:
diff changeset
40 {
92ace1ca50a8 64 bits kernel without interrupts but with printf in C
windel
parents:
diff changeset
41 unsigned char *vidmem = (unsigned char *) VIDMEM;
92ace1ca50a8 64 bits kernel without interrupts but with printf in C
windel
parents:
diff changeset
42 int loop;
92ace1ca50a8 64 bits kernel without interrupts but with printf in C
windel
parents:
diff changeset
43
92ace1ca50a8 64 bits kernel without interrupts but with printf in C
windel
parents:
diff changeset
44 for (loop = 0; loop < SCREEN_SIZE; loop++) {
92ace1ca50a8 64 bits kernel without interrupts but with printf in C
windel
parents:
diff changeset
45 *vidmem++ = 0x20;
23
5dd47d6eebac Added ubersimple malloc algorithm
windel
parents: 18
diff changeset
46 *vidmem++ = video_color;
9
92ace1ca50a8 64 bits kernel without interrupts but with printf in C
windel
parents:
diff changeset
47 }
92ace1ca50a8 64 bits kernel without interrupts but with printf in C
windel
parents:
diff changeset
48 }
92ace1ca50a8 64 bits kernel without interrupts but with printf in C
windel
parents:
diff changeset
49
24
d8627924d40d Split up in more files and reboot command
windel
parents: 23
diff changeset
50 void init_screen()
9
92ace1ca50a8 64 bits kernel without interrupts but with printf in C
windel
parents:
diff changeset
51 {
92ace1ca50a8 64 bits kernel without interrupts but with printf in C
windel
parents:
diff changeset
52 clear_screen();
24
d8627924d40d Split up in more files and reboot command
windel
parents: 23
diff changeset
53 set_cursor(0, 0);
9
92ace1ca50a8 64 bits kernel without interrupts but with printf in C
windel
parents:
diff changeset
54 }
92ace1ca50a8 64 bits kernel without interrupts but with printf in C
windel
parents:
diff changeset
55
24
d8627924d40d Split up in more files and reboot command
windel
parents: 23
diff changeset
56 static void scroll_screen()
9
92ace1ca50a8 64 bits kernel without interrupts but with printf in C
windel
parents:
diff changeset
57 {
24
d8627924d40d Split up in more files and reboot command
windel
parents: 23
diff changeset
58 uint8_t* v;
9
92ace1ca50a8 64 bits kernel without interrupts but with printf in C
windel
parents:
diff changeset
59 int i;
92ace1ca50a8 64 bits kernel without interrupts but with printf in C
windel
parents:
diff changeset
60
24
d8627924d40d Split up in more files and reboot command
windel
parents: 23
diff changeset
61 // Shift all lines one up:
d8627924d40d Split up in more files and reboot command
windel
parents: 23
diff changeset
62 v = (uint8_t*)VIDMEM;
d8627924d40d Split up in more files and reboot command
windel
parents: 23
diff changeset
63 for (i = 0; i < SCREEN_SIZE; i++ )
d8627924d40d Split up in more files and reboot command
windel
parents: 23
diff changeset
64 {
d8627924d40d Split up in more files and reboot command
windel
parents: 23
diff changeset
65 *v = *(v + NUM_COLS*2);
d8627924d40d Split up in more files and reboot command
windel
parents: 23
diff changeset
66 ++v;
d8627924d40d Split up in more files and reboot command
windel
parents: 23
diff changeset
67 *v = *(v + NUM_COLS*2);
9
92ace1ca50a8 64 bits kernel without interrupts but with printf in C
windel
parents:
diff changeset
68 ++v;
92ace1ca50a8 64 bits kernel without interrupts but with printf in C
windel
parents:
diff changeset
69 }
92ace1ca50a8 64 bits kernel without interrupts but with printf in C
windel
parents:
diff changeset
70
24
d8627924d40d Split up in more files and reboot command
windel
parents: 23
diff changeset
71 // Clear new line:
d8627924d40d Split up in more files and reboot command
windel
parents: 23
diff changeset
72 v = (uint8_t*)VIDMEM + SCREEN_SIZE * 2 - NUM_COLS * 2;
d8627924d40d Split up in more files and reboot command
windel
parents: 23
diff changeset
73 for (i = 0; i < NUM_COLS; i++)
d8627924d40d Split up in more files and reboot command
windel
parents: 23
diff changeset
74 {
d8627924d40d Split up in more files and reboot command
windel
parents: 23
diff changeset
75 *v++ = ' ';
d8627924d40d Split up in more files and reboot command
windel
parents: 23
diff changeset
76 *v++ = video_color;
9
92ace1ca50a8 64 bits kernel without interrupts but with printf in C
windel
parents:
diff changeset
77 }
92ace1ca50a8 64 bits kernel without interrupts but with printf in C
windel
parents:
diff changeset
78 }
92ace1ca50a8 64 bits kernel without interrupts but with printf in C
windel
parents:
diff changeset
79
24
d8627924d40d Split up in more files and reboot command
windel
parents: 23
diff changeset
80 static void new_line()
9
92ace1ca50a8 64 bits kernel without interrupts but with printf in C
windel
parents:
diff changeset
81 {
92ace1ca50a8 64 bits kernel without interrupts but with printf in C
windel
parents:
diff changeset
82 ++row;
92ace1ca50a8 64 bits kernel without interrupts but with printf in C
windel
parents:
diff changeset
83 col = 0;
24
d8627924d40d Split up in more files and reboot command
windel
parents: 23
diff changeset
84 if (row == NUM_ROWS)
d8627924d40d Split up in more files and reboot command
windel
parents: 23
diff changeset
85 {
9
92ace1ca50a8 64 bits kernel without interrupts but with printf in C
windel
parents:
diff changeset
86 scroll_screen();
92ace1ca50a8 64 bits kernel without interrupts but with printf in C
windel
parents:
diff changeset
87 row = NUM_ROWS - 1;
92ace1ca50a8 64 bits kernel without interrupts but with printf in C
windel
parents:
diff changeset
88 }
92ace1ca50a8 64 bits kernel without interrupts but with printf in C
windel
parents:
diff changeset
89 }
92ace1ca50a8 64 bits kernel without interrupts but with printf in C
windel
parents:
diff changeset
90
24
d8627924d40d Split up in more files and reboot command
windel
parents: 23
diff changeset
91 static void clear_to_EOL()
9
92ace1ca50a8 64 bits kernel without interrupts but with printf in C
windel
parents:
diff changeset
92 {
92ace1ca50a8 64 bits kernel without interrupts but with printf in C
windel
parents:
diff changeset
93 int loop;
92ace1ca50a8 64 bits kernel without interrupts but with printf in C
windel
parents:
diff changeset
94 unsigned char *v = (unsigned char *) ((uint64_t)(VIDMEM + row * NUM_COLS * 2 + col * 2));
92ace1ca50a8 64 bits kernel without interrupts but with printf in C
windel
parents:
diff changeset
95
92ace1ca50a8 64 bits kernel without interrupts but with printf in C
windel
parents:
diff changeset
96 for (loop = col; loop < NUM_COLS; loop++) {
92ace1ca50a8 64 bits kernel without interrupts but with printf in C
windel
parents:
diff changeset
97 *v++ = ' ';
23
5dd47d6eebac Added ubersimple malloc algorithm
windel
parents: 18
diff changeset
98 *v++ = video_color;
9
92ace1ca50a8 64 bits kernel without interrupts but with printf in C
windel
parents:
diff changeset
99 }
92ace1ca50a8 64 bits kernel without interrupts but with printf in C
windel
parents:
diff changeset
100 }
92ace1ca50a8 64 bits kernel without interrupts but with printf in C
windel
parents:
diff changeset
101
24
d8627924d40d Split up in more files and reboot command
windel
parents: 23
diff changeset
102 static void print_char(int c)
9
92ace1ca50a8 64 bits kernel without interrupts but with printf in C
windel
parents:
diff changeset
103 {
92ace1ca50a8 64 bits kernel without interrupts but with printf in C
windel
parents:
diff changeset
104 unsigned char *v = (unsigned char *) ((uint64_t)(VIDMEM + row * NUM_COLS * 2 + col * 2));
92ace1ca50a8 64 bits kernel without interrupts but with printf in C
windel
parents:
diff changeset
105
92ace1ca50a8 64 bits kernel without interrupts but with printf in C
windel
parents:
diff changeset
106 switch(c) {
92ace1ca50a8 64 bits kernel without interrupts but with printf in C
windel
parents:
diff changeset
107 case '\n':
92ace1ca50a8 64 bits kernel without interrupts but with printf in C
windel
parents:
diff changeset
108 clear_to_EOL();
92ace1ca50a8 64 bits kernel without interrupts but with printf in C
windel
parents:
diff changeset
109 new_line();
92ace1ca50a8 64 bits kernel without interrupts but with printf in C
windel
parents:
diff changeset
110 break;
92ace1ca50a8 64 bits kernel without interrupts but with printf in C
windel
parents:
diff changeset
111 default:
92ace1ca50a8 64 bits kernel without interrupts but with printf in C
windel
parents:
diff changeset
112 *v++ = (unsigned char) c;
23
5dd47d6eebac Added ubersimple malloc algorithm
windel
parents: 18
diff changeset
113 *v = video_color;
9
92ace1ca50a8 64 bits kernel without interrupts but with printf in C
windel
parents:
diff changeset
114
92ace1ca50a8 64 bits kernel without interrupts but with printf in C
windel
parents:
diff changeset
115 if (col < NUM_COLS - 1)
92ace1ca50a8 64 bits kernel without interrupts but with printf in C
windel
parents:
diff changeset
116 ++col;
92ace1ca50a8 64 bits kernel without interrupts but with printf in C
windel
parents:
diff changeset
117 else
92ace1ca50a8 64 bits kernel without interrupts but with printf in C
windel
parents:
diff changeset
118 new_line();
92ace1ca50a8 64 bits kernel without interrupts but with printf in C
windel
parents:
diff changeset
119 }
18
6129643f5c34 Fixed interrupt issue, ds, es, ss, fs and gs were not initialized to 0
windel
parents: 9
diff changeset
120 move_cursor();
9
92ace1ca50a8 64 bits kernel without interrupts but with printf in C
windel
parents:
diff changeset
121 }
92ace1ca50a8 64 bits kernel without interrupts but with printf in C
windel
parents:
diff changeset
122
24
d8627924d40d Split up in more files and reboot command
windel
parents: 23
diff changeset
123 void print_string(const char *s)
9
92ace1ca50a8 64 bits kernel without interrupts but with printf in C
windel
parents:
diff changeset
124 {
24
d8627924d40d Split up in more files and reboot command
windel
parents: 23
diff changeset
125 while (*s != '\0')
d8627924d40d Split up in more files and reboot command
windel
parents: 23
diff changeset
126 {
9
92ace1ca50a8 64 bits kernel without interrupts but with printf in C
windel
parents:
diff changeset
127 print_char(*s++);
92ace1ca50a8 64 bits kernel without interrupts but with printf in C
windel
parents:
diff changeset
128 }
92ace1ca50a8 64 bits kernel without interrupts but with printf in C
windel
parents:
diff changeset
129 }
92ace1ca50a8 64 bits kernel without interrupts but with printf in C
windel
parents:
diff changeset
130