The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/sys/vmem.h

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    1 /*      $NetBSD: vmem.h,v 1.22 2020/06/16 06:42:36 thorpej Exp $        */
    2 
    3 /*-
    4  * Copyright (c)2006 YAMAMOTO Takashi,
    5  * All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  *
   16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   26  * SUCH DAMAGE.
   27  */
   28 
   29 #ifndef _SYS_VMEM_H_
   30 #define _SYS_VMEM_H_
   31 
   32 #include <sys/types.h>
   33 
   34 #if defined(_KERNEL)
   35 #else /* defined(_KERNEL) */
   36 #include <stdbool.h>
   37 #endif /* defined(_KERNEL) */
   38 
   39 typedef struct vmem vmem_t;
   40 
   41 typedef unsigned int vm_flag_t;
   42 
   43 typedef uintptr_t vmem_addr_t;
   44 typedef size_t vmem_size_t;
   45 #define VMEM_ADDR_MIN   0
   46 #define VMEM_ADDR_MAX   (~(vmem_addr_t)0)
   47 
   48 typedef int     (vmem_import_t)(vmem_t *, vmem_size_t, vm_flag_t,
   49                     vmem_addr_t *);
   50 typedef void    (vmem_release_t)(vmem_t *, vmem_addr_t, vmem_size_t);
   51 
   52 typedef int     (vmem_ximport_t)(vmem_t *, vmem_size_t, vmem_size_t *,
   53                     vm_flag_t, vmem_addr_t *);
   54 
   55 extern vmem_t *kmem_arena;
   56 extern vmem_t *kmem_meta_arena;
   57 extern vmem_t *kmem_va_arena;
   58 
   59 void            vmem_subsystem_init(vmem_t *vm);
   60 
   61 vmem_t *        vmem_create(const char *, vmem_addr_t, vmem_size_t, vmem_size_t,
   62                     vmem_import_t *, vmem_release_t *, vmem_t *, vmem_size_t,
   63                     vm_flag_t, int);
   64 vmem_t *        vmem_xcreate(const char *, vmem_addr_t, vmem_size_t,
   65                     vmem_size_t, vmem_ximport_t *, vmem_release_t *, vmem_t *,
   66                     vmem_size_t, vm_flag_t, int);
   67 vmem_t *        vmem_init(vmem_t *, const char *, vmem_addr_t, vmem_size_t,
   68                     vmem_size_t, vmem_import_t *, vmem_release_t *, vmem_t *,
   69                     vmem_size_t, vm_flag_t, int);
   70 void            vmem_destroy(vmem_t *);
   71 int             vmem_alloc(vmem_t *, vmem_size_t, vm_flag_t, vmem_addr_t *);
   72 void            vmem_free(vmem_t *, vmem_addr_t, vmem_size_t);
   73 int             vmem_xalloc(vmem_t *, vmem_size_t, vmem_size_t, vmem_size_t,
   74                     vmem_size_t, vmem_addr_t, vmem_addr_t, vm_flag_t,
   75                     vmem_addr_t *);
   76 void            vmem_xfree(vmem_t *, vmem_addr_t, vmem_size_t);
   77 void            vmem_xfreeall(vmem_t *);
   78 int             vmem_add(vmem_t *, vmem_addr_t, vmem_size_t, vm_flag_t);
   79 vmem_size_t     vmem_roundup_size(vmem_t *, vmem_size_t);
   80 vmem_size_t     vmem_size(vmem_t *, int typemask);
   81 void            vmem_rehash_start(void);
   82 void            vmem_whatis(uintptr_t, void (*)(const char *, ...)
   83                     __printflike(1, 2));
   84 void            vmem_print(uintptr_t, const char *, void (*)(const char *, ...)
   85                     __printflike(1, 2));
   86 void            vmem_printall(const char *, void (*)(const char *, ...)
   87                     __printflike(1, 2));
   88 
   89 /* vm_flag_t */
   90 #define VM_SLEEP        0x00000001
   91 #define VM_NOSLEEP      0x00000002
   92 #define VM_INSTANTFIT   0x00001000
   93 #define VM_BESTFIT      0x00002000
   94 #define VM_BOOTSTRAP    0x00010000
   95 #define VM_POPULATING   0x00040000
   96 #define VM_LARGEIMPORT  0x00080000
   97 #define VM_XIMPORT      0x00100000
   98 
   99 /* vmem_size typemask */
  100 #define VMEM_ALLOC      0x01
  101 #define VMEM_FREE       0x02
  102 
  103 #endif /* !_SYS_VMEM_H_ */

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