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Annotation of prex-old/sys/include/vm.h, Revision 1.1.1.1

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 */