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88 lines
2.7 KiB
88 lines
2.7 KiB
#include "src/kernel/fs.h"
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#include "src/kernel/gdt.h"
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#include "src/kernel/idt.h"
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#include "src/kernel/keyboard.h"
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#include "src/kernel/panic.h"
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#include "src/kernel/path.h"
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#include "src/kernel/pic.h"
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#include "src/kernel/process.h"
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#include "src/kernel/syscall.h"
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#include "src/kernel/tss.h"
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#include "src/kernel/util.h"
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#include "src/kernel/vga.h"
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#include "src/lib/layout.h"
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#include "src/lib/memory.h"
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__attribute__((interrupt)) void isr_divide_by_zero(__attribute__((unused)) struct interrupt_frame *frame) {
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vga_set_string(VGA_HEIGHT - 1, 0, "EXCEPTION: divide by zero", 0x4F);
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while (1)
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;
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}
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__attribute__((interrupt)) void isr_page_fault(__attribute__((unused)) struct interrupt_frame *frame) {
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vga_set_string(VGA_HEIGHT - 1, 0, "EXCEPTION: page fault", 0x4F);
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while (1)
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;
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}
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__attribute__((interrupt)) void isr_general_violation(__attribute__((unused)) struct interrupt_frame *frame) {
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vga_set_string(VGA_HEIGHT - 1, 0, "EXCEPTION: general violation", 0x4F);
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while (1)
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;
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}
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__attribute__((interrupt)) void isr_ata_primary(__attribute__((unused)) struct interrupt_frame *frame) {
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outb(0x20, 0x20);
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outb(0xA0, 0x20);
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}
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void kernel_main() {
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pic_init();
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idt_init();
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outb(0x21, inb(0x21) | 0x01); // mask out timer interrupt
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idt_set_entry(0, isr_divide_by_zero, 0x8E);
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idt_set_entry(0x0E, isr_page_fault, 0x8E);
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idt_set_entry(0x0D, isr_general_violation, 0x8E);
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idt_set_entry(46, isr_ata_primary, 0x8E);
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__asm__ volatile("sti");
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gdt_init();
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syscall_init();
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process_t *kernel = memory_allocate(sizeof(process_t));
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kernel->pml4 = (void *)KERNEL_VIRTUAL_PML4;
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kernel->root = fs_mount();
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kernel->cwd = memory_allocate(sizeof(path_t));
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kernel->stdin = keyboard_init();
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kernel->stdout = vga_init();
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fs_node_t *bin = path_open_file(kernel->root, kernel->cwd, "bin/terminal");
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ASSERT(bin, "kernel: terminal not found");
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uint8_t *code = memory_allocate(bin->size);
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fs_read(bin, 0, bin->size, code);
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process_t *terminal = process_create(kernel, code, bin->size);
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memory_free(code);
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fs_close(bin);
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__asm__ volatile("mov %0, %%cr3" : : "r"((uint64_t)VIRT_TO_PHYS((void *)KERNEL_VIRTUAL_PML4)) : "memory");
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uint8_t *stack = (uint8_t *)terminal->user_stack;
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stack -= sizeof(uint64_t);
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*(uint64_t *)stack = 0;
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terminal->user_rsp = (void *)(USER_VIRTUAL_STACK_TOP - ((uint64_t)terminal->user_stack - (uint64_t)stack));
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current_process = terminal;
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tss.rsp0 = (uint64_t)current_process->kernel_stack;
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process_switch_to(&kernel->kernel_rsp, terminal->kernel_rsp, VIRT_TO_PHYS(terminal->pml4));
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fs_unmount((fs_node_t *)kernel->root);
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outw(0x604, 0x2000); // TODO: parse ACPI tables for real hardware
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__asm__ volatile("cli; hlt");
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}
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