Luna/kernel/include/memory/MemoryManager.h

#pragma once
#include "utils/Result.h"
#include <stdint.h>

#ifndef PAGE_SIZE
#define PAGE_SIZE 4096
#endif

#define MAP_READ_WRITE 1 << 0
#define MAP_USER 1 << 1
#define MAP_EXEC 1 << 2
#define MAP_AS_OWNED_BY_TASK 1 << 3

namespace MemoryManager
{
    void init();

    void protect_kernel_sections();

    Result<void*> get_mapping(void* physicalAddress, int flags = MAP_READ_WRITE);
    void release_mapping(void* mapping);

    Result<void*> get_unaligned_mapping(void* physicalAddress, int flags = MAP_READ_WRITE);
    Result<void*> get_unaligned_mappings(void* physicalAddress, uint64_t count, int flags = MAP_READ_WRITE);
    void release_unaligned_mapping(void* mapping);
    void release_unaligned_mappings(void* mapping, uint64_t count);

    Result<void*> get_page(int flags = MAP_READ_WRITE);
    Result<void*> get_pages(uint64_t count, int flags = MAP_READ_WRITE);

    Result<void*> get_page_at(uint64_t addr, int flags = MAP_READ_WRITE);
    Result<void*> get_pages_at(uint64_t addr, uint64_t count, int flags = MAP_READ_WRITE);

    void release_page(void* page);
    void release_pages(void* pages, uint64_t count);

    void protect(void* page, uint64_t count, int flags);

    void map_several_pages(uint64_t physicalAddress, uint64_t virtualAddress, uint64_t count,
                           int flags = MAP_READ_WRITE);
}