]>
git.dujemihanovic.xyz Git - nameless-os.git/blob - kernel/kernel/kernel.c
4 #include <irq/interrupt.h>
5 #include <irq/i8259a.h>
10 struct idt_descriptor idt
[256] __attribute__((aligned(0x10)));
11 struct idtr idtr
__attribute__((aligned(0x10)));
12 extern void (*_int_handler_table
[48])(void);
21 void print_e820(struct e820_map
*mmap
, int mmap_size
)
23 kprint(" Base | Length | Type | Attrib |\n", VGA_LIGHT_GRAY
, VGA_BLACK
);
24 kprint("------------------------------------------------------------\n", VGA_LIGHT_GRAY
, VGA_BLACK
);
25 for (int i
=0; i
<mmap_size
; i
++) {
26 kprintq(mmap
[i
].base
, 1);
27 kprintc('|', VGA_LIGHT_GRAY
, VGA_BLACK
);
28 kprintq(mmap
[i
].length
, 1);
29 kprintc('|', VGA_LIGHT_GRAY
, VGA_BLACK
);
30 kprintd(mmap
[i
].type
, 1);
31 kprintc('|', VGA_LIGHT_GRAY
, VGA_BLACK
);
32 kprintd(mmap
[i
].attrib
, 1);
33 kprintc('|', VGA_LIGHT_GRAY
, VGA_BLACK
);
34 kprintc('\n', VGA_LIGHT_GRAY
, VGA_BLACK
);
38 /* Small handler for double faults. Will be put elsewhere eventually. */
39 int double_fault_handler(struct interrupt_frame
*frame
)
41 kprint("Double fault occurred!\n", VGA_BRIGHT_RED
, VGA_BLACK
);
42 kprint("EAX: ", VGA_LIGHT_GRAY
, VGA_BLACK
);
43 kprintd(frame
->eax
, 1);
44 kprintc(' ', VGA_LIGHT_GRAY
, VGA_BLACK
);
45 kprint("EBX: ", VGA_LIGHT_GRAY
, VGA_BLACK
);
46 kprintd(frame
->ebx
, 1);
47 kprintc(' ', VGA_LIGHT_GRAY
, VGA_BLACK
);
48 kprint("ECX: ", VGA_LIGHT_GRAY
, VGA_BLACK
);
49 kprintd(frame
->ecx
, 1);
50 kprintc(' ', VGA_LIGHT_GRAY
, VGA_BLACK
);
51 kprint("EDX: ", VGA_LIGHT_GRAY
, VGA_BLACK
);
52 kprintd(frame
->edx
, 1);
53 kprintc('\n', VGA_LIGHT_GRAY
, VGA_BLACK
);
54 kprint("EBP: ", VGA_LIGHT_GRAY
, VGA_BLACK
);
55 kprintd(frame
->ebp
, 1);
56 kprintc(' ', VGA_LIGHT_GRAY
, VGA_BLACK
);
57 kprint("ESP: ", VGA_LIGHT_GRAY
, VGA_BLACK
);
58 kprintd(frame
->esp
, 1);
59 kprintc('\n', VGA_LIGHT_GRAY
, VGA_BLACK
);
60 kprint("ESI: ", VGA_LIGHT_GRAY
, VGA_BLACK
);
61 kprintd(frame
->esi
, 1);
62 kprintc(' ', VGA_LIGHT_GRAY
, VGA_BLACK
);
63 kprint("EDI: ", VGA_LIGHT_GRAY
, VGA_BLACK
);
64 kprintd(frame
->edi
, 1);
65 kprintc('\n', VGA_LIGHT_GRAY
, VGA_BLACK
);
66 kprint("EIP: ", VGA_LIGHT_GRAY
, VGA_BLACK
);
67 kprintd(frame
->eip
, 1);
68 kprintc(' ', VGA_LIGHT_GRAY
, VGA_BLACK
);
69 kprint("EFLAGS: ", VGA_LIGHT_GRAY
, VGA_BLACK
);
70 kprintd(frame
->eflags
, 1);
71 kprintc('\n', VGA_LIGHT_GRAY
, VGA_BLACK
);
72 PANIC("double fault");
75 void kmain(struct e820_map
*mmap
, int mmap_size
)
78 kprint("Welcome to Nameless OS!\nRunning revision: ", VGA_LIGHT_GRAY
, VGA_BLACK
);
79 kprint(GIT_COMMIT
, VGA_LIGHT_GRAY
, VGA_BLACK
);
80 kprint("\n", VGA_LIGHT_GRAY
, VGA_BLACK
);
81 kprint("BIOS memory map:\n", VGA_LIGHT_GRAY
, VGA_BLACK
);
82 print_e820(mmap
, mmap_size
);
83 kprint("Preparing IDT...\n", VGA_LIGHT_GRAY
, VGA_BLACK
);
84 for (int i
=0; i
<48; i
++) {
85 idt_set_descriptor(idt
, i
, 0x8, _int_handler_table
[i
], IDT_INTERRUPT_GATE
, 0);
87 kprint("IDT prepared, loading...\n", VGA_LIGHT_GRAY
, VGA_BLACK
);
88 populate_idtr(&idtr
, idt
);
90 kprint("Setting up interrupts...\n", VGA_LIGHT_GRAY
, VGA_BLACK
);
91 register_interrupt(8, &double_fault_handler
);
95 kprint("All done\n", VGA_LIGHT_GRAY
, VGA_BLACK
);