Implement VirtualAllocation class

include/memory/macro.hpp

@@ -49,13 +49,18 @@
 
 #if defined(a64) || defined(aa64)
 #define KERNEL_VMA_OFFSET 0xFFFFFFFF80000000
-#define KERNEL_HEAP_BASE 0xFFFFFF0000000000
 
-#define USER_STACK_BASE 0xFFFFEFFFFFFF0000
+#define USER_ALLOC_BASE 0xFFFFA00000000000 /* 256 GiB */
+#define USER_ALLOC_END 0xFFFFB00000000000
+
 #define USER_STACK_END 0xFFFFEFFF00000000 /* 256 MiB */
+#define USER_STACK_BASE 0xFFFFEFFFFFFF0000
 #elif defined(a32)
 #define KERNEL_VMA_OFFSET 0xC0000000
-#define KERNEL_HEAP_BASE 0xA0000000
+
+#define USER_ALLOC_BASE 0x80000000
+#define USER_ALLOC_END 0xA0000000
+
 #define USER_STACK_BASE 0xEFFFFFFF
 #define USER_STACK_END 0xE0000000
 #endif

include/memory/va.hpp

@@ -0,0 +1,60 @@
+/*
+	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_VA_H__
+#define __FENNIX_KERNEL_MEMORY_VA_H__
+
+#include <types.h>
+#include <lock.hpp>
+#include <list>
+
+#include <memory/table.hpp>
+
+namespace Memory
+{
+	class VirtualAllocation
+	{
+	public:
+		struct AllocatedPages
+		{
+			void *PhysicalAddress;
+			void *VirtualAddress;
+			size_t PageCount;
+			bool Free;
+		};
+
+	private:
+		NewLock(MgrLock);
+
+		std::list<AllocatedPages> AllocatedPagesList;
+		void *BaseAddress;
+		void *CurrentBase;
+
+	public:
+		PageTable *Table;
+
+		AllocatedPages RequestPages(size_t Count);
+		void FreePages(void *Address, size_t Count);
+
+		void MapTo(AllocatedPages ap, PageTable *Table);
+
+		VirtualAllocation(void *Base);
+		~VirtualAllocation();
+	};
+}
+
+#endif // !__FENNIX_KERNEL_MEMORY_VA_H__

include/task.hpp

@@ -21,6 +21,7 @@
 #include <types.h>
 
 #include <filesystem.hpp>
+#include <memory/va.hpp>
 #include <symbols.hpp>
 #include <memory.hpp>
 #include <signal.hpp>
@@ -498,11 +499,10 @@ namespace Tasking
 		NewLock(TaskingLock);
 
 		PID NextPID = 0;
-
 		PCB *KernelProcess = nullptr;
-
 		void *Scheduler = nullptr;
 		void *__sched_ctx = nullptr;
+		Memory::VirtualAllocation va = (void *)0xFFFFA00000000000;
 
 		constexpr TaskArchitecture GetKArch()
 		{