// virt_to_phys: Converts virtual address into physical address // for the current address space // Returns physical address or 0 on error long int virt_to_phys(long int virtual) { if (virtual >= 0xC0000000 && virtual <= 0xC03FFFFF) { // If located in special 4MB kernel memory page, return (virtual - 0xC0000000 + 0x400000); // then we dont need to bother with the page tables } return 0; }