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
|
#include <kernel/arch/amd64/3rdparty/multiboot2.h>
#include <kernel/arch/amd64/acpi.h>
#include <kernel/arch/amd64/boot.h>
#include <kernel/arch/amd64/driver/driver.h>
#include <kernel/arch/amd64/driver/serial.h>
#include <kernel/arch/amd64/interrupts.h>
#include <kernel/arch/amd64/pci.h>
#include <kernel/arch/amd64/tty/tty.h>
#include <kernel/arch/generic.h>
#include <kernel/malloc.h>
#include <kernel/panic.h>
#include <kernel/proc.h>
static void *mbi_tag(void *mbi, uint32_t type) {
struct multiboot_tag *tag;
for (tag = mbi + 8;
tag->type != MULTIBOOT_TAG_TYPE_END;
tag = ((void*)tag) + ((tag->size + 7) & ~7))
{
if (tag->type == type)
return tag;
}
kprintf("bootloader didn't pass required tag type %u\n", type);
panic_invalid_state();
}
void kmain_early(void *mbi) {
GfxInfo vid;
struct {
void *addr; size_t len;
} init;
tty_init();
kprintf("idt...");
idt_init();
kprintf("irq...");
irq_init();
{
kprintf("mem...\n");
struct multiboot_tag_basic_meminfo *meminfo;
meminfo = mbi_tag(mbi, MULTIBOOT_TAG_TYPE_BASIC_MEMINFO);
mem_init((void*)(long)(meminfo->mem_upper * 1024));
}
{
struct multiboot_tag_framebuffer *framebuf;
framebuf = mbi_tag(mbi, MULTIBOOT_TAG_TYPE_FRAMEBUFFER);
vid.b = (void*)framebuf->common.framebuffer_addr;
vid.pitch = framebuf->common.framebuffer_pitch;
vid.width = framebuf->common.framebuffer_width;
vid.height = framebuf->common.framebuffer_height;
vid.bpp = framebuf->common.framebuffer_bpp;
vid.size = vid.pitch * vid.height;
mem_reserve(vid.b, vid.size);
kprintf("framebuffer at 0x%x, %ux%u bpp %u\n", vid.b, vid.width, vid.height, vid.bpp);
}
{
struct multiboot_tag_module *mod;
mod = mbi_tag(mbi, MULTIBOOT_TAG_TYPE_MODULE);
init.addr = (void*)(long)mod->mod_start;
init.len = mod->mod_end - mod->mod_start;
mem_reserve(init.addr, init.len);
}
kprintf("rootfs...\n");
vfs_root_init();
ps2_init();
serial_init();
video_init(vid);
pata_init();
{
struct multiboot_tag_old_acpi *mod;
mod = mbi_tag(mbi, MULTIBOOT_TAG_TYPE_ACPI_OLD);
acpi_parse(mod->rsdp);
}
kprintf("pci...\n");
pci_init();
kprintf("running init...\n");
proc_seed(init.addr, init.len);
proc_switch_any();
}
void shutdown(void) {
kprintf("[kern] shutting off\n");
mem_debugprint();
cpu_shutdown();
}
|
