Colony » Colony Scout » Colony Scout OS

/*-

 * Copyright (c) 2005-2009, Kohsuke Ohtani

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 * 3. Neither the name of the author nor the names of any co-contributors

 *    may be used to endorse or promote products derived from this software

 *    without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.

 */

#ifndef _VM_H

#define _VM_H

#include <types.h>

#include <sys/cdefs.h>

#include <sys/sysinfo.h>

#include <sys/bootinfo.h>

/*

 * One structure per allocated segment.

 */

struct seg {

        struct seg        *prev;                /* segment list sorted by address */

        struct seg        *next;

        struct seg        *sh_prev;        /* link for all shared segments */

        struct seg        *sh_next;

        vaddr_t                addr;                /* base address */

        size_t                size;                /* size */

        int                flags;                /* SEG_* flag */

        paddr_t                phys;                /* physical address */

};

/* Flags for segment */

#define SEG_READ        0x00000001

#define SEG_WRITE        0x00000002

#define SEG_EXEC        0x00000004

#define SEG_SHARED        0x00000008

#define SEG_MAPPED        0x00000010

#define SEG_FREE        0x00000080

/* Attribute for vm_attribute() */

#define        PROT_NONE        0x0                /* pages cannot be accessed */

#define        PROT_READ        0x1                /* pages can be read */

#define        PROT_WRITE        0x2                /* pages can be written */

#define        PROT_EXEC        0x4                /* pages can be executed */

/*

 * VM mapping per one task.

 */

struct vm_map {

        struct seg        head;                /* list head of segements */

        int                refcnt;                /* reference count */

        pgd_t                pgd;                /* page directory */

        size_t                total;                /* total used size */

};

__BEGIN_DECLS

int         vm_allocate(task_t, void **, size_t, int);

int         vm_free(task_t, void *);

int         vm_attribute(task_t, void *, int);

int         vm_map(task_t, void *, size_t, void **);

vm_map_t vm_dup(vm_map_t);

vm_map_t vm_create(void);

int         vm_reference(vm_map_t);

void         vm_terminate(vm_map_t);

void         vm_switch(vm_map_t);

int         vm_load(vm_map_t, struct module *, void **);

paddr_t         vm_translate(vaddr_t, size_t);

int         vm_info(struct vminfo *);

void         vm_init(void);

__END_DECLS

#endif /* !_VM_H */