/**************************************************************************************
 Copyright (c) 2002 The UbixOS Project
 All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

Redistributions of source code must retain the above copyright notice, this list of conditions, the following disclaimer and the list of authors.
Redistributions in binary form must reproduce the above copyright notice, this list of conditions, the following disclaimer and the list of authors
in the documentation and/or other materials provided with the distribution. Neither the name of the UbixOS Project nor the names of its
contributors may be used to endorse or promote products derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED
WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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 $Id: paging.h,v 1.1 2003/01/10 18:33:01 reddawg Exp $

**************************************************************************************/

#ifndef _PAGING_H
#define _PAGING_H

#include <ubixos/types.h>

#define pageSize             4096
#define pageEntries          1024
#define pagePresent          0x00000001
#define pageWrite            0x00000002
#define pageUser             0x00000004
#define pageCow              0x00000200
#define pageStack            0x00000400
#define pageDefault          (pagePresent|pageWrite|pageUser)
#define directoryBaseAddress 0x101000
#define tablesBaseAddress    0xBFC00000

void initPagingSystem();
void remapPage(uInt32 sourceAddr,uInt32 destAddr,pidType pid);
void pageFault();
void pageFaultISR();
void *getFreeKernelPage(pidType pid);
void clearVirtualPage(uInt32 pageAddr);
void doubleFault();
void doubleFaultCleanUp();
void *copyVirtualSpace(pidType pid);

extern uInt32 *kernelPageDirectory;

#endif