107 lines
3.2 KiB
C
107 lines
3.2 KiB
C
/*****************************************
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* VulcanOS Kernel *
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* Developed by Marco 'icebit' Cetica *
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* (c) 2019-2021 *
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* Released under GPLv3 *
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* https://github.com/ice-bit/vulcanos *
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*****************************************/
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#include "drivers/tty.h"
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#include "drivers/gdt.h"
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#include "drivers/idt.h"
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#include "drivers/timer.h"
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#include "drivers/keyboard.h"
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#include "drivers/initrd.h"
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#include "mem/paging.h"
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#include "mem/kheap.h"
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#include "mem/multiboot.h"
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#include "userspace/shell.h"
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#include "libc/stdio.h"
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#include "libc/panic.h"
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#include <stdint.h>
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#define PRTOK printf("\n["); printf_color(" OK ", LIGHT_GREEN, BLACK); printf("]"); // Ugly hack to print "[ OK ]"
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#define PRTAT printf("\n["); printf_color(" ** ", LIGHT_BROWN, BLACK); printf("]"); // Ugly hack to print "[ * ]"
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#define PRTER printf("\n["); printf_color(" ERR ", LIGHT_RED, BLACK); printf("]"); // Ugly hack to print "[ ER ]"
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uint32_t initrd_setup( struct multiboot *mboot_ptr) {
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if(mboot_ptr->mods_count < 0) { // Assert that initrd image is available
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PRTER
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puts(" - initrd not found!");
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PANIC("Cannot find initrd");
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}
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extern uint32_t placement_addr;
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uint32_t initrd_location = *((uint32_t*)mboot_ptr->mods_addr);
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uint32_t initrd_end = *(uint32_t*)(mboot_ptr->mods_addr+4);
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placement_addr = initrd_end;
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return initrd_location;
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}
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void kernel_main(unsigned long magic, uint32_t addr, struct multiboot *mboot_ptr) {
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// First of all, check if we're booted by a Multiboot-compliant boot loader
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if(magic != MULTIBOOT2_BOOTLOADER_MAGIC) {
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PRTER
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printf(" - Invalid magic number: %x\n", (unsigned)magic);
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PANIC("Invalid multiboot magic number");
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}
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if(addr & 7) {
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PRTER
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printf(" - Unaligned mbi: %x\n", addr);
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PANIC("Unaligned multiboot MBI");
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}
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printf("Loading kernel, wait please...");
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gdt_setup(); // Setup Global Descriptor Table
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PRTOK
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printf(" - Loaded GDT");
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idt_setup(); // Setup Interrupt Descriptor Table
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PRTOK
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printf(" - Loaded IDT");
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init_timer(1); // Initialize PIT driver
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PRTOK
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printf(" - Loaded PIT");
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init_keyboard(); // Initialize keyboard driver
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PRTOK
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printf(" - Loaded PS/2 driver");
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uint32_t loc = initrd_setup(mboot_ptr); // Setup initial ramdisk
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init_paging(); // Initialize paging
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PRTOK
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printf(" - Loaded Paging");
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// Now we can start initrd
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fs_root = init_ramdisk(loc);
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PRTOK
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printf(" - Loaded Initrd");
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PRTAT
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printf(" - Testing heap...\t");
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uint32_t x = kmalloc(32), y = kmalloc(32);
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printf("x: %x, y: %x", x, y);
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kfree((void*)y);
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uint32_t z = kmalloc(8);
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printf(", z: %x", z); // If z is equal to y, heap's anti-fragmentation algorithm works
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if(z != y) {
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PRTER
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puts(" - Heap test has failed!");
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PANIC("Different heap pages");
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}
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kfree((void*)z), kfree((void*)x);
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PRTOK
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printf(" - Heap works!");
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init_prompt(); // Initialize frame buffer
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}
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