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Annotation of prex-old/sys/include/vm.h, Revision 1.1

1.1     ! nbrk        1: /*-
        !             2:  * Copyright (c) 2005-2007, Kohsuke Ohtani
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * Redistribution and use in source and binary forms, with or without
        !             6:  * modification, are permitted provided that the following conditions
        !             7:  * are met:
        !             8:  * 1. Redistributions of source code must retain the above copyright
        !             9:  *    notice, this list of conditions and the following disclaimer.
        !            10:  * 2. Redistributions in binary form must reproduce the above copyright
        !            11:  *    notice, this list of conditions and the following disclaimer in the
        !            12:  *    documentation and/or other materials provided with the distribution.
        !            13:  * 3. Neither the name of the author nor the names of any co-contributors
        !            14:  *    may be used to endorse or promote products derived from this software
        !            15:  *    without specific prior written permission.
        !            16:  *
        !            17:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
        !            18:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            19:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            20:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
        !            21:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            22:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            23:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            24:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            25:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            26:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            27:  * SUCH DAMAGE.
        !            28:  */
        !            29:
        !            30: #ifndef _VM_H
        !            31: #define _VM_H
        !            32:
        !            33: #include <arch.h>
        !            34:
        !            35: /*
        !            36:  * One structure per allocated region.
        !            37:  */
        !            38: struct region {
        !            39:        struct region   *prev;          /* region list sorted by address */
        !            40:        struct region   *next;
        !            41:        struct region   *sh_prev;       /* link for all shared region */
        !            42:        struct region   *sh_next;
        !            43:        u_long          addr;           /* base address */
        !            44:        size_t          size;           /* size */
        !            45:        int             flags;          /* flag */
        !            46: #ifdef CONFIG_MMU
        !            47:        u_long          phys;           /* physical address */
        !            48: #endif
        !            49: };
        !            50:
        !            51: /* Flags for region */
        !            52: #define REG_READ       0x00000001
        !            53: #define REG_WRITE      0x00000002
        !            54: #define REG_EXEC       0x00000004
        !            55: #define REG_SHARED     0x00000008
        !            56: #define REG_MAPPED     0x00000010
        !            57: #define REG_FREE       0x00000080
        !            58:
        !            59: /*
        !            60:  * VM mapping per one task.
        !            61:  */
        !            62: struct vm_map {
        !            63:        struct region   head;           /* list head of regions */
        !            64:        int             ref_count;      /* reference count */
        !            65:        pgd_t           pgd;            /* page directory */
        !            66: };
        !            67:
        !            68: /* VM attributes */
        !            69: #define VMA_READ       0x01
        !            70: #define VMA_WRITE      0x02
        !            71: #define VMA_EXEC       0x04
        !            72:
        !            73: extern int      vm_allocate(task_t, void **, size_t, int);
        !            74: extern int      vm_free(task_t, void *);
        !            75: extern int      vm_attribute(task_t, void *, int);
        !            76: extern int      vm_map(task_t, void *, size_t, void **);
        !            77: extern vm_map_t         vm_fork(vm_map_t);
        !            78: extern vm_map_t         vm_create(void);
        !            79: extern int      vm_reference(vm_map_t);
        !            80: extern void     vm_terminate(vm_map_t);
        !            81: extern void     vm_switch(vm_map_t);
        !            82: extern int      vm_load(vm_map_t, struct module *, void **);
        !            83: extern void    *vm_translate(void *, size_t);
        !            84: extern int      vm_access(void *, size_t, int);
        !            85: extern void     vm_dump(void);
        !            86: extern void     vm_init(void);
        !            87:
        !            88: #endif /* !_VM_H */