arch/x86/include/sys/pmem.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, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 #ifndef _SYS_PMEM_H
  28 #define _SYS_PMEM_H
  29
  30 #pragma ident   "%Z%%M% %I%     %E% SMI"
  31
  32 #ifdef  __cplusplus
  33 extern "C" {
  34 #endif
  35
  36 /*
  37  * PMEM - Direct mapping physical memory pages to userland process
  38  *
  39  * Provide consolidation private functions used for directly (w/o occupying
  40  * kernel virtual address space) allocating and exporting physical memory pages
  41  * to userland.
  42  */
  43
  44 /*
  45  * Flags to pass to pmem_alloc
  46  */
  47 #define PMEM_SLEEP      0x1
  48 #define PMEM_NOSLEEP    0x2
  49
  50 /*
  51  * Called by driver devmap routine to pass physical memory mapping info to
  52  * seg_dev framework, used only for physical memory allocated from
  53  * devmap_pmem_alloc().
  54  */
  55 int     devmap_pmem_setup(devmap_cookie_t, dev_info_t *dip,
  56     struct devmap_callback_ctl *, devmap_pmem_cookie_t, offset_t,
  57     size_t, uint_t, uint_t, ddi_device_acc_attr_t *);
  58
  59 /*
  60  * Replace existing mapping using a new cookie, mainly gets called when doing
  61  * fork(). Should be called in pertinent devmap_dup(9E).
  62  */
  63 int     devmap_pmem_remap(devmap_cookie_t, dev_info_t *dip,
  64     devmap_pmem_cookie_t, offset_t, size_t, uint_t, uint_t,
  65     ddi_device_acc_attr_t *);
  66
  67 /*
  68  * Directly (i.e., without occupying kernel virtual address space) allocate
  69  * 'npages' physical memory pages for exporting to user land. The allocated
  70  * page_t pointer will be recorded in cookie.
  71  */
  72 int     devmap_pmem_alloc(size_t, uint_t, devmap_pmem_cookie_t *);
  73
  74 void    devmap_pmem_free(devmap_pmem_cookie_t);
  75
  76 int     devmap_pmem_getpfns(devmap_pmem_cookie_t, uint_t, pgcnt_t, pfn_t *);
  77
  78 void    pmem_init();
  79
  80 #ifdef  __cplusplus
  81 }
  82 #endif
  83
  84 #endif  /* _SYS_PMEM_H */