/*****************************************************************************************
Copyright (c) 2002-2004 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, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
$Id$
*****************************************************************************************/
#ifndef _PAGING_H
#define _PAGING_H
#include <ubixos/types.h>
#define pageLength 0x00000400
#define pageSize 4096
#define pageEntries (pageSize/4)
#define pageCow 0x00000200
#define tablesBaseAddress 0xBFC00000
#define parentPageDirAddr 0x100000
#define PAGE_STACK 0x00000400
#define PAGE_PRESENT 0x00000001
#define PAGE_WRITE 0x00000002
#define PAGE_USER 0x00000004
#define PAGE_EXECUTE 0x00000008
#define PAGE_DEFAULT (PAGE_PRESENT|PAGE_WRITE|PAGE_USER)
#define KERNEL_PAGE_DEFAULT (PAGE_PRESENT|PAGE_WRITE)
int vmmClearVirtualPage(uInt32 pageAddr);
void vmmUnmapPage(uInt32,int);
void vmmUnmapPages(void *,uInt32);
void *vmmMapFromTask(pidType,void *,uInt32);
void *vmmCopyVirtualSpace(pidType);
void *vmmGetFreePage(pidType);
void *vmmGetFreeKernelPage(pidType pid,uInt16 count);
void *vmmCreateVirtualSpace(pidType);
void *vmmGetFreeVirtualPage(pidType,int);
uInt32 vmm_getPhysicalAddr(uInt32);
int vmm_setPageAttributes(uInt32,uInt16);
int vmm_remapPage(uInt32,uInt32,uInt16);
int vmm_pagingInit();
void *vmm_getFreeMallocPage(uInt16 count);
void vmm_pageFault(uInt32,uInt32,uInt32);
void _vmm_pageFault();
extern uInt32 *kernelPageDirectory;
#endif
/***
$Log$
Revision 1.11 2005/08/10 04:35:03 fsdfs
updates. gcc is still barking at me for adding new items to the headers.
Revision 1.10 2005/08/10 04:14:04 fsdfs
reworking memory management and WTF is with all the errors in the headers
it won't let me add anything!?
Revision 1.9 2005/08/08 21:33:44 fsdfs
new scheduler!
Revision 1.8 2004/08/14 11:23:02 reddawg
Changes
Revision 1.7 2004/07/28 15:05:43 reddawg
Major:
Pages now have strict security enforcement.
Many null dereferences have been resolved.
When apps loaded permissions set for pages rw and ro
Revision 1.6 2004/07/26 19:15:49 reddawg
test code, fixes and the like
Revision 1.5 2004/07/24 23:04:44 reddawg
Changes... mark let me know if you fault at pid 185 when you type stress
Revision 1.4 2004/07/24 20:00:51 reddawg
Lots of changes to the vmm subsystem.... Page faults have been adjust to now be blocking on a per thread basis not system wide. This has resulted in no more deadlocks.. also the addition of per thread locking has removed segfaults as a result of COW in which two tasks fault the same COW page and try to modify it.
Revision 1.3 2004/07/22 17:32:25 reddawg
I broke it hopefully
Revision 1.2 2004/05/21 15:21:04 reddawg
Cleaned up
END
***/
