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vmpagemd.h revision 1.1 
      1 /*	$NetBSD: vmpagemd.h,v 1.1 2012/10/03 00:51:47 christos 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 #include "opt_modular.h"
     50 #include "opt_multiprocessor.h"
     51 
     52 #include <sys/mutex.h>
     53 
     54 #define	__HAVE_VM_PAGE_MD
     55 
     56 typedef struct pv_entry {
     57 	struct pv_entry *pv_next;
     58 	struct pmap *pv_pmap;
     59 	vaddr_t pv_va;
     60 } *pv_entry_t;
     61 
     62 #define	VM_PAGEMD_REFERENCED	0x0001	/* page has been recently referenced */
     63 #define	VM_PAGEMD_MODIFIED	0x0002	/* page has been modified */
     64 #define	VM_PAGEMD_POOLPAGE	0x0004	/* page is used as a poolpage */
     65 #define	VM_PAGEMD_EXECPAGE	0x0008	/* page is exec mapped */
     66 #ifdef __PMAP_VIRTUAL_CACHE_ALIASES
     67 #define	VM_PAGEMD_UNCACHED	0x0010	/* page is mapped uncached */
     68 #endif
     69 
     70 #ifdef __PMAP_VIRTUAL_CACHE_ALIASES
     71 #define	VM_PAGEMD_CACHED_P(mdpg)	(((mdpg)->mdpg_attrs & VM_PAGEMD_UNCACHED) == 0)
     72 #define	VM_PAGEMD_UNCACHED_P(mdpg)	(((mdpg)->mdpg_attrs & VM_PAGEMD_UNCACHED) != 0)
     73 #endif
     74 #define	VM_PAGEMD_MODIFIED_P(mdpg)	(((mdpg)->mdpg_attrs & VM_PAGEMD_MODIFIED) != 0)
     75 #define	VM_PAGEMD_REFERENCED_P(mdpg)	(((mdpg)->mdpg_attrs & VM_PAGEMD_REFERENCED) != 0)
     76 #define	VM_PAGEMD_POOLPAGE_P(mdpg)	(((mdpg)->mdpg_attrs & VM_PAGEMD_POOLPAGE) != 0)
     77 #define	VM_PAGEMD_EXECPAGE_P(mdpg)	(((mdpg)->mdpg_attrs & VM_PAGEMD_EXECPAGE) != 0)
     78 
     79 struct vm_page_md {
     80 	volatile u_int mdpg_attrs;	/* page attributes */
     81 	struct pv_entry mdpg_first;	/* pv_entry first */
     82 #if defined(MULTIPROCESSOR) || defined(MODULAR)
     83 	kmutex_t *mdpg_lock;		/* pv list lock */
     84 #define	VM_PAGEMD_PVLIST_LOCK_INIT(mdpg) 	\
     85 	(mdpg)->mdpg_lock = NULL
     86 #define	VM_PAGEMD_PVLIST_LOCK(pg, list_change)	\
     87 	pmap_pvlist_lock(mdpg, list_change)
     88 #define	VM_PAGEMD_PVLIST_UNLOCK(mdpg)		\
     89 	mutex_spin_exit((mdpg)->mdpg_lock)
     90 #define	VM_PAGEMD_PVLIST_LOCKED_P(mdpg)		\
     91 	mutex_owner((mdpg)->mdpg_lock)
     92 #define	VM_PAGEMD_PVLIST_GEN(mdpg)		\
     93 	((uint16_t)((mdpg)->mdpg_attrs >> 16))
     94 #else
     95 #define	VM_PAGEMD_PVLIST_LOCK_INIT(mdpg)	do { } while (/*CONSTCOND*/ 0)
     96 #define	VM_PAGEMD_PVLIST_LOCK(mdpg, lc)	(mutex_spin_enter(&pmap_pvlist_mutex), 0)
     97 #define	VM_PAGEMD_PVLIST_UNLOCK(mdpg)	mutex_spin_exit(&pmap_pvlist_mutex)
     98 #define	VM_PAGEMD_PVLIST_LOCKED_P(mdpg)	true
     99 #define	VM_PAGEMD_PVLIST_GEN(mdpg)		(0)
    100 #endif /* MULTIPROCESSOR || MODULAR */
    101 };
    102 
    103 #define VM_MDPAGE_INIT(pg)						\
    104 do {									\
    105 	(pg)->mdpage.mdpg_first.pv_next = NULL;				\
    106 	(pg)->mdpage.mdpg_first.pv_pmap = NULL;				\
    107 	(pg)->mdpage.mdpg_first.pv_va = (pg)->phys_addr;		\
    108 	(pg)->mdpage.mdpg_attrs = 0;					\
    109 	VM_PAGEMD_PVLIST_LOCK_INIT(&(pg)->mdpage);			\
    110 } while (/* CONSTCOND */ 0)
    111 
    112 #endif /* __COMMON_PMAP_TLB_VMPAGEMD_H_ */
    113