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_ */ 115