mirror of
https://github.com/Fennix-Project/Kernel.git
synced 2025-05-28 15:34:33 +00:00
108 lines
2.5 KiB
C++
108 lines
2.5 KiB
C++
/*
|
|
This file is part of Fennix Kernel.
|
|
|
|
Fennix Kernel is free software: you can redistribute it and/or
|
|
modify it under the terms of the GNU General Public License as
|
|
published by the Free Software Foundation, either version 3 of
|
|
the License, or (at your option) any later version.
|
|
|
|
Fennix Kernel is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with Fennix Kernel. If not, see <https://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#ifndef __FENNIX_KERNEL_MEMORY_VMA_H__
|
|
#define __FENNIX_KERNEL_MEMORY_VMA_H__
|
|
|
|
#include <types.h>
|
|
#include <filesystem.hpp>
|
|
#include <bitmap.hpp>
|
|
#include <lock.hpp>
|
|
#include <vector>
|
|
|
|
#include <memory/table.hpp>
|
|
|
|
namespace Memory
|
|
{
|
|
class VirtualMemoryArea
|
|
{
|
|
public:
|
|
struct AllocatedPages
|
|
{
|
|
void *Address;
|
|
size_t PageCount;
|
|
};
|
|
|
|
struct SharedRegion
|
|
{
|
|
void *Address = nullptr;
|
|
bool Read = 0, Write = 0, Exec = 0;
|
|
bool Fixed = 0, Shared = 0;
|
|
size_t Length = 0;
|
|
size_t ReferenceCount = 0;
|
|
};
|
|
|
|
private:
|
|
NewLock(MgrLock);
|
|
Bitmap PageBitmap;
|
|
PageTable *Table;
|
|
|
|
std::vector<AllocatedPages> AllocatedPagesList;
|
|
std::vector<SharedRegion> SharedRegions;
|
|
|
|
public:
|
|
PageTable *GetTable() { return Table; }
|
|
void SetTable(PageTable *Table) { this->Table = Table; }
|
|
|
|
std::vector<AllocatedPages> &GetAllocatedPagesList()
|
|
{
|
|
return AllocatedPagesList;
|
|
}
|
|
|
|
std::vector<SharedRegion> &GetSharedRegions()
|
|
{
|
|
return SharedRegions;
|
|
}
|
|
|
|
uint64_t GetAllocatedMemorySize();
|
|
|
|
bool Add(void *Address, size_t Count);
|
|
|
|
void *RequestPages(size_t Count, bool User = false);
|
|
void FreePages(void *Address, size_t Count);
|
|
void DetachAddress(void *Address);
|
|
|
|
/**
|
|
* Create a Copy-on-Write region
|
|
*
|
|
* @param Address Hint address
|
|
* @param Length Length of the region
|
|
* @param Read Make the region readable
|
|
* @param Write Make the region writable
|
|
* @param Exec Make the region executable
|
|
* @param Fixed Fixed address
|
|
* @param Shared Shared region
|
|
* @return Address of the region
|
|
*/
|
|
void *CreateCoWRegion(void *Address,
|
|
size_t Length,
|
|
bool Read, bool Write, bool Exec,
|
|
bool Fixed, bool Shared);
|
|
|
|
bool HandleCoW(uintptr_t PFA);
|
|
|
|
void FreeAllPages();
|
|
|
|
void Fork(VirtualMemoryArea *Parent);
|
|
|
|
VirtualMemoryArea(PageTable *Table = nullptr);
|
|
~VirtualMemoryArea();
|
|
};
|
|
}
|
|
|
|
#endif // !__FENNIX_KERNEL_MEMORY_VMA_H__
|