vmarea.h

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#ifndef __VM_AREA_H__
#define __VM_AREA_H__
 
#include <stdint.h>
#include <stdio.h>
#include <Mm\vmmngr.h>
#include <Mm\pmmngr.h>
#include <Fs\vfs.h>
#include <process.h>
 
/* protection flags */
#define VM_PRESENT  (1<<0)
#define VM_WRITE    (1<<1)
#define VM_EXEC     (1<<2)
#define VM_SHARED   (1<<3)
 
/* types of the area */
#define VM_TYPE_TEXT     1
#define VM_TYPE_DATA     2
#define VM_TYPE_STACK    3
#define VM_TYPE_HEAP     4
#define VM_TYPE_RESOURCE 5
 
 
/* AuVMArea -- virtual memory mapping area */
typedef struct _vm_area_ {
    size_t start;
    size_t end;
    size_t len;
    uint8_t prot_flags;
    uint8_t type;
    AuVFSNode* file;
}AuVMArea;
 
/*
* AuInsertVMArea -- insert a memory segment to the given process
* @param proc -- pointer to the process
* @param area -- pointer to the vm area
*/
extern void AuInsertVMArea(AuProcess* proc, AuVMArea* area);
 
/*
* AuRemoveVMArea -- removes a memory segment from the given
* process
* @param proc -- pointer to the process
* @param area -- pointer to the vm area
*/
extern void AuRemoveVMArea(AuProcess* proc, AuVMArea* area);
 
/*
* AuVMAreaCreate -- create virtual memory segment for
* current process
* @param start -- starting address
* @param end -- ending address
* @param prot -- protection flags
* @param len -- length of the area
* @param type -- type of the area
*/
extern AuVMArea* AuVMAreaCreate(size_t start, size_t end, uint8_t prot, size_t len, uint8_t type);
 
/*
* AuVMAreaGet -- finds a virtual memory area from the
* given address
* @param proc -- pointer to the process
* @param address -- address to search
*/
extern AuVMArea* AuVMAreaGet(AuProcess* proc, size_t address);
 
#endif