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rockOS/kernel/rockos/kernel.c

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/**
* Entry point of rockOS
* Copyright (C) 2022 Furkan Mudanyali
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, _either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
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#include <stdio.h>
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#include <rockos/tty.h>
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#include <rockos/keyboard.h>
#include <rockos/pic.h>
#include <rockos/hal.h>
#include <rockos/timer.h>
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#include <rockos/paging.h>
#include <rockos/kheap.h>
#include <rockos/multiboot.h>
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#include <rockos/vfs.h>
#include <rockos/rockos.h>
#include <string.h>
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extern char _rockos_start, _rockos_end;
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multiboot_info_t* multiboot_info;
Tar* files;
void bootloader_init(multiboot_info_t* mbd, unsigned int magic) {
/* Make sure the magic number matches for memory mapping*/
if(magic != MULTIBOOT_BOOTLOADER_MAGIC) {
panic("invalid magic number!");
}
/* Check bit 6 to see if we have a valid memory map */
if(!(mbd->flags >> 6 & 0x1)) {
panic("invalid memory map given by GRUB bootloader");
}
multiboot_info = mbd;
}
void kernel_main() {
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initialize_keyset();
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outb(0x70, 0x0); // Seconds
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uint8_t sec = inb(0x71);
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outb(0x70, 0x02); // Minutes
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uint8_t min = inb(0x71);
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outb(0x70, 0x04); // Hours
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uint8_t hour = inb(0x71);
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// BCD to binary conversion
sec = (sec & 0x0F) + ((sec / 16) * 10);
min = (min & 0x0F) + ((min / 16) * 10);
hour = ((hour & 0x0F) + (((hour & 0x70) / 16) * 10)) | (hour & 0x80);
printf("Time: %02d:%02d:%02d UTC+3\n", (hour + 3) % 24, min, sec);
for(multiboot_uint32_t i = 0; i < multiboot_info->mmap_length; i += sizeof(multiboot_memory_map_t)) {
multiboot_memory_map_t* mmmt =
(multiboot_memory_map_t*) (multiboot_info->mmap_addr + i);
printf("Start Addr: %#08X | Length: %#08X | Size: %#08X | Type: %X\n",
mmmt->addr_low, mmmt->len_low, mmmt->size, mmmt->type);
if(mmmt->type == MULTIBOOT_MEMORY_AVAILABLE) {
//
}
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}
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files = kmalloc(256 * sizeof(Tar));
uint32_t initrd_location = *((uint32_t*)multiboot_info->mods_addr);
printf("Initrd location: %#08X\n", initrd_location);
uint32_t fileCount = TarParse(initrd_location);
printf("Found files: %d\n", fileCount);
for(uint32_t i = 0; i < fileCount; ++i) {
printf("Filename: %s\n", files[i].header->filename);
printf("%s\n", files[i].data);
}
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unsigned char key;
for(;;) {
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key = readkey();
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if(key)
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putchar(key);
}
asm("cli; hlt");
}