sys/uvm/pmap/vmpagemd.h

   1 /*      $NetBSD: vmpagemd.h,v 1.2 2014/03/04 06:14:53 matt Exp $        */
   2
   3 /*-
   4  * Copyright (c) 2011 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Raytheon BBN Technologies Corp and Defense Advanced Research Projects
   9  * Agency and which was developed by Matt Thomas of 3am Software Foundry.
  10  *
  11  * This material is based upon work supported by the Defense Advanced Research
  12  * Projects Agency and Space and Naval Warfare Systems Center, Pacific, under
  13  * Contract No. N66001-09-C-2073.
  14  * Approved for Public Release, Distribution Unlimited
  15  *
  16  * Redistribution and use in source and binary forms, with or without
  17  * modification, are permitted provided that the following conditions
  18  * are met:
  19  * 1. Redistributions of source code must retain the above copyright
  20  *    notice, this list of conditions and the following disclaimer.
  21  * 2. Redistributions in binary form must reproduce the above copyright
  22  *    notice, this list of conditions and the following disclaimer in the
  23  *    documentation and/or other materials provided with the distribution.
  24  *
  25  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  26  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  27  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  28  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  29  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  30  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  31  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  32  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  33  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  34  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  35  * POSSIBILITY OF SUCH DAMAGE.
  36  */
  37
  38 #ifndef _COMMON_PMAP_TLB_VMPAGEMD_H_
  39 #define _COMMON_PMAP_TLB_VMPAGEMD_H_
  40
  41 #ifdef _LOCORE
  42 #error use assym.h instead
  43 #endif
  44
  45 #ifdef _MODULE
  46 #error this file should not be included by loadable kernel modules
  47 #endif
  48
  49 #ifdef _KERNEL_OPT
  50 #include "opt_modular.h"
  51 #include "opt_multiprocessor.h"
  52 #endif
  53
  54 #include <sys/mutex.h>
  55
  56 #define __HAVE_VM_PAGE_MD
  57
  58 typedef struct pv_entry {
  59         struct pv_entry *pv_next;
  60         struct pmap *pv_pmap;
  61         vaddr_t pv_va;
  62 } *pv_entry_t;
  63
  64 #define VM_PAGEMD_REFERENCED    0x0001  /* page has been recently referenced */
  65 #define VM_PAGEMD_MODIFIED      0x0002  /* page has been modified */
  66 #define VM_PAGEMD_POOLPAGE      0x0004  /* page is used as a poolpage */
  67 #define VM_PAGEMD_EXECPAGE      0x0008  /* page is exec mapped */
  68 #ifdef __PMAP_VIRTUAL_CACHE_ALIASES
  69 #define VM_PAGEMD_UNCACHED      0x0010  /* page is mapped uncached */
  70 #endif
  71
  72 #ifdef __PMAP_VIRTUAL_CACHE_ALIASES
  73 #define VM_PAGEMD_CACHED_P(mdpg)        (((mdpg)->mdpg_attrs & VM_PAGEMD_UNCACHED) == 0)
  74 #define VM_PAGEMD_UNCACHED_P(mdpg)      (((mdpg)->mdpg_attrs & VM_PAGEMD_UNCACHED) != 0)
  75 #endif
  76 #define VM_PAGEMD_MODIFIED_P(mdpg)      (((mdpg)->mdpg_attrs & VM_PAGEMD_MODIFIED) != 0)
  77 #define VM_PAGEMD_REFERENCED_P(mdpg)    (((mdpg)->mdpg_attrs & VM_PAGEMD_REFERENCED) != 0)
  78 #define VM_PAGEMD_POOLPAGE_P(mdpg)      (((mdpg)->mdpg_attrs & VM_PAGEMD_POOLPAGE) != 0)
  79 #define VM_PAGEMD_EXECPAGE_P(mdpg)      (((mdpg)->mdpg_attrs & VM_PAGEMD_EXECPAGE) != 0)
  80
  81 struct vm_page_md {
  82         volatile u_int mdpg_attrs;      /* page attributes */
  83         struct pv_entry mdpg_first;     /* pv_entry first */
  84 #if defined(MULTIPROCESSOR) || defined(MODULAR)
  85         kmutex_t *mdpg_lock;            /* pv list lock */
  86 #define VM_PAGEMD_PVLIST_LOCK_INIT(mdpg)        \
  87         (mdpg)->mdpg_lock = NULL
  88 #define VM_PAGEMD_PVLIST_LOCK(pg, list_change)  \
  89         pmap_pvlist_lock(mdpg, list_change)
  90 #define VM_PAGEMD_PVLIST_UNLOCK(mdpg)           \
  91         mutex_spin_exit((mdpg)->mdpg_lock)
  92 #define VM_PAGEMD_PVLIST_LOCKED_P(mdpg)         \
  93         mutex_owner((mdpg)->mdpg_lock)
  94 #define VM_PAGEMD_PVLIST_GEN(mdpg)              \
  95         ((uint16_t)((mdpg)->mdpg_attrs >> 16))
  96 #else
  97 #define VM_PAGEMD_PVLIST_LOCK_INIT(mdpg)        do { } while (/*CONSTCOND*/ 0)
  98 #define VM_PAGEMD_PVLIST_LOCK(mdpg, lc) (mutex_spin_enter(&pmap_pvlist_mutex), 0)
  99 #define VM_PAGEMD_PVLIST_UNLOCK(mdpg)   mutex_spin_exit(&pmap_pvlist_mutex)
 100 #define VM_PAGEMD_PVLIST_LOCKED_P(mdpg) true
 101 #define VM_PAGEMD_PVLIST_GEN(mdpg)              (0)
 102 #endif /* MULTIPROCESSOR || MODULAR */
 103 };
 104
 105 #define VM_MDPAGE_INIT(pg)                                              \
 106 do {                                                                    \
 107         (pg)->mdpage.mdpg_first.pv_next = NULL;                         \
 108         (pg)->mdpage.mdpg_first.pv_pmap = NULL;                         \
 109         (pg)->mdpage.mdpg_first.pv_va = (pg)->phys_addr;                \
 110         (pg)->mdpage.mdpg_attrs = 0;                                    \
 111         VM_PAGEMD_PVLIST_LOCK_INIT(&(pg)->mdpage);                      \
 112 } while (/* CONSTCOND */ 0)
 113
 114 #endif /* __COMMON_PMAP_TLB_VMPAGEMD_H_ */