Luna/kernel/src/arch/MMU.h

#pragma once
#include <Result.h>

struct PageDirectory;

extern const usize ARCH_PAGE_SIZE;

namespace MMU
{
    enum Flags
    {
        None = 0,
        ReadWrite = 1,
        User = 2,
        NoExecute = 4,
        WriteThrough = 8,
        CacheDisable = 16,
    };

    Result<void> map(u64 virt, u64 phys, int flags);
    Result<u64> unmap(u64 virt);
    Result<u64> get_physical(u64 virt);
    Result<int> get_flags(u64 virt);
    Result<void> remap(u64 virt, int flags);

    void switch_page_directory(PageDirectory* dir);
    PageDirectory* get_page_directory();

    void flush_all();

    Result<PageDirectory*> create_page_directory_for_userspace();
    void setup_initial_page_directory();
}