luxos/Kernel/include/memory-add.h

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/*
* memory-add.h
*
* Created on: Aug 27, 2011
* Author: Tiberiu
*/
#ifndef MEMORY_ADD_H_
#define MEMORY_ADD_H_
#include <memory.h>
#include <stdlib.h>
#include <debugio.h>
#include <array.h>
/***************************************************
* Paging *
***************************************************/
typedef uint32 Page;
enum PageFlags
{
PagePresent = 0x1,
PageWriteable = 0x2,
PageUser = 0x4,
PageWriteThough = 0x8,
PageNotCacheable = 0x10,
PageAccessed = 0x20,
PageDirty = 0x40,
PagePAT = 0x80,
PageCpuGlobal = 0x100,
PageLvl4Global = 0x200,
PageFrame = 0xFFFFF000
};
typedef struct {
Page Pages[1024];
} PageTable;
typedef struct {
PageTable* Tables[1024];
uint32 TablesPhysical[1024];
uint32 PhysicalAddr;
} PageDirectory;
extern PageDirectory* CurrentDirectory;
extern PageDirectory* KernelDirectory;
extern void PagingEnable ();
extern void PagingDisable ();
extern void PagingSwitchDirectory (PageDirectory* dir);
extern void PagingFlushTlb ();
extern void PagingInitialize (uint32* kernelEnd);
extern void PagingMapPage (uint32 phys, uint32 virt, uint32 flags, PageDirectory* pd);
extern void PagingUnmapPage (uint32 virt, PageDirectory* pd);
extern uint32 PagingGetPhysical (uint32 virt, PageDirectory* pd);
/***************************************************
* Physical memory manager *
***************************************************/
extern uint32 TotalBlocks;
extern uint32 TotalMemory;
extern uint32 UsedBlocks;
extern void MemPhInitialize (uint32 SystemMemoryKb);
extern void MemPhSetBlock (uint32 Block, uint8 value);
extern uint32 MemPhGetBlock (uint32 Block);
extern uint32 MemPhAllocateBlock ();
extern void MemPhFreeBlock (uint32 addr);
extern void MemPhReserveBlocks (uint32 address, uint32 length);
/***************************************************
* Memory heap *
***************************************************/
typedef struct
{
OrderedArray Index;
uint32 StartAddress, EndAddress, MaxAddress;
// bit 0: supervisor-only bit 1: read-only
uint8 Flags;
} MemHeap;
extern MemHeap* KernelHeap;
extern uint32 MemHeapFindSmallestHole (uint32 size, uint8 page_align, MemHeap* heap);
extern int32 MemHeapCompare (uint32 a, uint32 b);
extern MemHeap* MemHeapCreate (uint32 start, uint32 end, uint32 max, uint8 flags);
extern uint32 MemHeapExpand (uint32 newsz, MemHeap* heap, PageDirectory* pd);
extern uint32 MemHeapContract (uint32 newsz, MemHeap* heap, PageDirectory* pd);
extern uint32 MemHeapAlloc (uint32 size, uint8 isPageAligned, MemHeap* heap, PageDirectory* pd);
extern void MemHeapFree (uint32 address, MemHeap* heap, PageDirectory* pd);
#endif /* MEMORY_ADD_H_ */