105 lines
2.6 KiB
C
105 lines
2.6 KiB
C
#include "multiboot.h"
|
|
#include "interrupts.h"
|
|
#include "gdt.h"
|
|
#include "scheduler.h"
|
|
#include "common.h"
|
|
#include "vfs.h"
|
|
|
|
#include <lib/print.h>
|
|
#include <lib/stream.h>
|
|
#include <lib/memory.h>
|
|
|
|
#include <memory/mm.h>
|
|
|
|
#include <drivers/iso/iso.h>
|
|
#include <drivers/ide/ide.h>
|
|
#include <drivers/pic/pic.h>
|
|
#include <drivers/ps2/ps2.h>
|
|
#include <drivers/pit/pit.h>
|
|
#include <drivers/vga/vga.h>
|
|
#include <drivers/cpio/cpio.h>
|
|
|
|
#include <stddef.h>
|
|
#include <stdint.h>
|
|
|
|
extern char __kernel_start;
|
|
extern char __kernel_end;
|
|
|
|
void parse_multiboot_modules(uint32_t mbi_vaddr) {
|
|
// find where grub put the boot module containing initrd
|
|
multiboot_info* mbi = (multiboot_info*)mbi_vaddr;
|
|
|
|
uint32_t mod_count = mbi->mods_count;
|
|
multiboot_module_t* mod = (multiboot_module_t*)((uint32_t)mbi->mods_addr + 0xC0000000);
|
|
|
|
kprintf("found %d mods starting @ [v]0x%x\n", mod_count, (uint32_t)mod);
|
|
|
|
for (uint32_t i = 0; i < mod_count; i++) {
|
|
uint32_t start = mod[i].mod_start;
|
|
uint32_t end = mod[i].mod_end;
|
|
uint32_t cmdline = mod[i].cmdline;
|
|
|
|
multiboot_module_info_table[i].mod_start = start + 0xC0000000;
|
|
multiboot_module_info_table[i].mod_end = end + 0xC0000000;
|
|
multiboot_module_info_table[i].cmdline = cmdline + 0xC0000000;
|
|
}
|
|
}
|
|
|
|
vfs_node_t* load_initrd() {
|
|
multiboot_module_t* initrd_module = &multiboot_module_info_table[0];
|
|
kprintf("initrd found @ [v] 0x%x\n", initrd_module->mod_start);
|
|
return cpio_read_fs(initrd_module->mod_start);
|
|
}
|
|
|
|
void load_origin_program() {
|
|
vfs_node_t* vfs_root = vfs_create_root();
|
|
vfs_node_t* initrd_root = load_initrd();
|
|
|
|
if (initrd_root) {
|
|
mount(vfs_root, initrd_root);
|
|
kprintf("initrd read, mounted @ /\n");
|
|
|
|
int fd = open("/origin.elf", 0);
|
|
if (fd == -1) {
|
|
kprintf("failed to read origin program\n");
|
|
}
|
|
|
|
void* buf = kalloc(512);
|
|
int rd = read(fd, buf, 512);
|
|
if (rd > 0) {
|
|
kprintf("read %d bytes from origin.elf\n", rd);
|
|
}
|
|
}
|
|
exit();
|
|
}
|
|
|
|
void kmain(uint32_t magic, multiboot_info* mbi) {
|
|
disable_interrupts();
|
|
if (!(mbi->flags & (1 << 6))) {
|
|
return;
|
|
}
|
|
|
|
vga_init();
|
|
|
|
uint32_t mmap_virtual_addr = mbi->mmap_addr + 0xC0000000;
|
|
init_pmm((void*)mmap_virtual_addr, mbi->mmap_length);
|
|
kprintf("memory detection complete. total free memory: %dMB\n", total_free_memory() / 1024 / 1024);
|
|
|
|
init_gdt();
|
|
init_idt();
|
|
init_pic();
|
|
init_pit();
|
|
|
|
init_page_tables();
|
|
|
|
parse_multiboot_modules((uint32_t)mbi);
|
|
|
|
kprintf("basic initializations complete\n");
|
|
|
|
disable_interrupts();
|
|
init_scheduler();
|
|
enable_interrupts();
|
|
|
|
create_task((uint32_t)load_origin_program, fetch_cr3());
|
|
}
|