1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
|
void kmain();
void init()
{
kmain();
}
#include "def.h"
#include "paging.h"
#include "gfx.h"
#include "halt.h"
#include "heap.h"
#include "font.h"
#include "interrupts.h"
#include "pic.h"
#include "io.h"
#include "ata.h"
#include "pci.h"
#include "ps2.h"
#include "thread.h"
#include "shell.h"
char keymap[256] = { '\0' };
void keyboard_handler()
{
str buffer = NILS;
usize cap = 0;
print(S("$ "));
bool shift = false;
for (;;) {
event *e = yield(nil);
u8 code = e->data.scancode;
free(e);
bool stop = (code & (1 << 7)) != 0;
code &= ~(1 << 7);
char c = keymap[code*2+shift];
if (c == '\xe') {
shift = !stop;
} else if (stop) {
} else if (c == '\b') {
if (buffer.len > 0) {
print_char(c);
buffer.len--;
}
} else if (c == '\n') {
print_char(c);
shell_run_cmd(buffer);
buffer.len = 0;
print(S("$ "));
} else if (c != '\0') {
print_char(c);
if (buffer.len == cap)
buffer.data = realloc(buffer.data, cap = cap ? cap*2 : 1);
buffer.data[buffer.len++] = c;
}
}
}
void kmain()
{
heap_init();
#define MMAP for (MemRegion *mreg = (void *) 0x500; mreg->start != nil; mreg++)
// backup memory map
usize n_mreg = 0;
MMAP n_mreg++;
MemRegion mregs[n_mreg];
{
usize i = 0;
MMAP mregs[i++] = *mreg;
}
// setup paging
MMAP page_region(mreg);
page_region(&(MemRegion) {
.start = (void *) (u64) gfx_info->framebuffer,
.size = gfx_info->pitch * gfx_info->height,
.used = MEM_RESERVED,
});
// heap init
MMAP heap_add_region(mreg);
// font init
font_init();
font_set_size(1);
font_load_classic();
font_clear_screen();
// memory map
print(S("memory map:\n"));
for (usize i = 0; i < n_mreg; i++) {
print_num_pad((u64) mregs[i].start, 16, 16, ' ');
print(S(" | "));
print_num_pad((u64) mregs[i].start + mregs[i].size, 16, 16, ' ');
print(S(" | "));
print_dec(mregs[i].used);
print(S("\n"));
}
interrupts_init();
pic_init();
thread_init();
ata_init();
ps2_init();
shell_run_cmd(S("run init"));
thread *keyboard_thread = thread_create(S("keyboard"), &keyboard_handler);
irq_services[1] = keyboard_thread;
unmask_irq(1);
enable_irqs();
thread_sched(nil, nil);
freeze();
}
|
