Luna/kernel/include/memory/VMM.h

#pragma once
#include "memory/Paging.h"

enum Flags
{
    ReadWrite = 1 << 0,
    User = 1 << 1,
    Execute = 1 << 2
};
namespace VMM
{
    void init(); // fetch page table from cr3

    void map(uint64_t virtualAddress, uint64_t physicalAddress, int flags);
    void remap(uint64_t virtualAddress, int flags);
    void unmap(uint64_t virtualAddress);
    uint64_t getPhysical(uint64_t virtualAddress);
    uint64_t getFlags(uint64_t virtualAddress);

    PageDirectoryEntry* find_pde(PageTable* root, uint64_t virtualAddress);
    PageDirectoryEntry* create_pde_if_not_exists(PageTable* root, uint64_t virtualAddress);

    void propagate_read_write(PageTable* root, uint64_t virtualAddress);
    void propagate_user(PageTable* root, uint64_t virtualAddress);

    void flush_tlb(uint64_t addr);
};