60 lines
2.2 KiB
C++
60 lines
2.2 KiB
C++
#ifndef __CPAGEDIRECTORY_H__
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#define __CPAGEDIRECTORY_H__
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#include "types.h"
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extern "C" {
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#include "Tier0/paging.h"
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};
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// This is more-or less just a C++ wrapper for T_PGAE_DIRECTORY.
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namespace cb {
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class CPageDirectory {
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friend class CKernel;
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friend class CScheduler;
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friend class CTask;
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protected:
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// The paging direcotry structure
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T_PAGING_DIRECTORY *m_Directory;
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// A bitmap precising whether a table is owned by the page directory
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// (== can we delete it when we delete the directory itself)
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volatile u32 m_OwnerBitmap[32];
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// Check whether a table is owned by us
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bool IsTableOurs(u32 Virtual);
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// Creates a new table in the address space. Do not use these in
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// other directories, as they will e automatically deleted when the
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// page directory is deleted - sorry, no reference counting yet!
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void CreateTable(u32 Virtual, u8 User = 1, u8 RW = 1);
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// Whether it was created empty
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bool m_bCreatedEmpty;
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public:
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// Creates a new page directory for a kernel task
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CPageDirectory(bool Empty = false);
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~CPageDirectory(void);
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// Mapping
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void MapTable(u32 Virtual, u32 Physical, u8 User = 1, u8 RW = 1);
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void MapPage(u32 Virtual, u32 Physical, u8 User = 1, u8 RW = 1);
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void MapRange(u32 Virtual, u32 Physical, u32 Size, u8 User = 1,
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u8 RW = 1);
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void UnmapPage(u32 Virtual);
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// Linking (usually to the kernel directory)
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void LinkTable(u32 Virtual, CPageDirectory *Source);
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// Copying (from any other page directory)
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void CopyTable(u32 Virtual, CPageDirectory *Source,
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bool Deep = false, u8 User = 1, u8 RW = 1);
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void CopyPage(u32 Virtual, CPageDirectory *Destination, u8 User = 1,
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u8 RW = 1);
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// Translates a virtual adddress
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u32 Translate(u32 Virtual);
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};
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};
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#endif
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