usr/src/uts/common/sys/memlist.h

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25
  26 #ifndef _SYS_MEMLIST_H
  27 #define _SYS_MEMLIST_H
  28
  29 #pragma ident   "%Z%%M% %I%     %E% SMI" /* SunOS-4.0 1.7 */
  30
  31 /*
  32  * Common memlist format, exported by boot.
  33  */
  34
  35 #include <sys/types.h>
  36
  37 #ifdef __cplusplus
  38 extern "C" {
  39 #endif
  40
  41 /*
  42  * Boot programs of version 4 and greater pass a linked list
  43  * of struct memlist to the kernel.
  44  */
  45 struct memlist {
  46         uint64_t        address;        /* starting address of memory segment */
  47         uint64_t        size;           /* size of same */
  48         struct memlist  *next;          /* link to next list element */
  49         struct memlist  *prev;          /* link to previous list element */
  50 };
  51
  52 extern int address_in_memlist(struct memlist *, uint64_t, size_t);
  53
  54 /*
  55  * phys_install is the pointer to the physical installed memory list
  56  * which may change when memory is added or deleted. The functions
  57  * memlist_read_lock() and memlist_read_unlock() should be used
  58  * to protect reading this list.
  59  */
  60 extern struct memlist *phys_install;
  61
  62 extern pgcnt_t num_phys_pages();
  63
  64 #ifdef __cplusplus
  65 }
  66 #endif
  67
  68 #endif  /* _SYS_MEMLIST_H */