/*****************************************************************************************
 Copyright (c) 2002-2004, 2016 The UbixOS Project
 All rights reserved.

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 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
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 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
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 $Id: paging.h 233 2016-01-24 01:49:43Z reddawg $

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

#ifndef _PAGING_H_
#define _PAGING_H_

#include <sys/types.h>
#include <sys/sysproto.h>
#include <sys/thread.h>

#define PD_INDEX(v_addr)  (v_addr >> 22)
#define PD_OFFSET(v_addr) (v_addr >> 0xA)
#define PT_INDEX(v_addr)  ((v_addr >> 12) & 0x03FF)

#define PD_BASE_ADDR2      ((PAGE_SIZE << 0xA) + VMM_KERN_START)

#define PD_BASE_ADDR      0xC0400000
#define PT_BASE_ADDR      0xC0000000

#define PD_ENTRIES        (PAGE_SIZE/4)
#define PT_ENTRIES        (PAGE_SIZE/4)

#define VM_THRD           0
#define VM_TASK           1

/*
 #define pageLength        0x00000400
 #define pageSize          4096
 #define pageEntries       (pageSize/4)
 */

/*
 #define tablesBaseAddress   0xBFC00000
 #define parentPageDirAddr   0x100000
 */

#define PAGE_PRESENT        0x00000001
#define PAGE_WRITE          0x00000002
#define PAGE_USER           0x00000004
#define PAGE_WRITE_THROUGH  0x00000008
#define PAGE_CACHE_DISABLED 0x00000010
#define PAGE_ACCESSED       0x00000020
#define PAGE_DIRTY          0x00000040
#define PAGE_GLOBAL         0x00000080
#define PAGE_               0x00000100
#define PAGE_COW            0x00000200
#define PAGE_STACK          0x00000400
#define PAGE_WIRED          0x00000800

#define PAGE_DEFAULT        (PAGE_PRESENT|PAGE_WRITE|PAGE_USER)
#define KERNEL_PAGE_DEFAULT (PAGE_PRESENT|PAGE_WRITE)

#define PAGE_SHIFT      12              /* LOG2(PAGE_SIZE) */
#define PAGE_SIZE       0x1000          /* bytes/page */
#define PAGE_MASK       (PAGE_SIZE-1)

#define trunc_page(x)   ((x) & ~PAGE_MASK)
#define round_page(x)   (((x) + PAGE_MASK) & ~PAGE_MASK)

#define ctob(x)         ((x)<<PAGE_SHIFT)
#define btoc(x)         (((vm_offset_t)(x)+PAGE_MASK)>>PAGE_SHIFT)

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, 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( struct trapframe *, u_int32_t );
void _vmm_pageFault();
int mmap( struct thread *, struct sys_mmap_args * );
int obreak( struct thread *, struct obreak_args * );
int munmap( struct thread *, struct munmap_args * );

int vmm_cleanVirtualSpace( u_int32_t );

extern uInt32 *kernelPageDirectory;

#endif

/***
 END
 ***/