]>
git.dujemihanovic.xyz Git - nameless-os.git/blob - kernel/kernel.c
adfdd3f58021c698a9cba474d7870680e5dbf696
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", 0);
24 kprint("------------------------------------------------------------\n", 0);
25 for (int i
=0; i
<mmap_size
; i
++) {
26 kprintq(mmap
[i
].base
);
28 kprintq(mmap
[i
].length
);
30 kprintd(mmap
[i
].type
);
32 kprintd(mmap
[i
].attrib
);
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_COLOR_BRIGHT_RED
);
69 kprint("EFLAGS: ", 0);
70 kprintd(frame
->eflags
);
72 PANIC("double fault");
75 void kmain(struct e820_map
*mmap
, int mmap_size
)
78 kprint("Welcome to Nameless OS!\nRunning revision: ", 0);
79 kprint(GIT_COMMIT
, 0);
81 kprint("BIOS memory map:\n", 0);
82 print_e820(mmap
, mmap_size
);
83 kprint("Preparing IDT...\n", 0);
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", 0);
88 populate_idtr(&idtr
, idt
);
90 kprint("Setting up interrupts...\n", 0);
91 register_interrupt(8, &double_fault_handler
);
95 kprint("All done\n", 0);