93 lines
2.5 KiB
C
93 lines
2.5 KiB
C
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/* $NetBSD: pmap_pv.h,v 1.3 2011/06/12 03:35:50 rmind Exp $ */
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/*-
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* Copyright (c)2008 YAMAMOTO Takashi,
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef _X86_PMAP_PV_H_
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#define _X86_PMAP_PV_H_
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#include <sys/mutex.h>
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#include <sys/queue.h>
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struct vm_page;
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/*
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* structures to track P->V mapping
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*
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* this file is intended to be minimum as it's included by <machine/vmparam.h>.
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*/
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/*
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* pv_pte: describe a pte
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*/
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struct pv_pte {
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struct vm_page *pte_ptp; /* PTP; NULL for pmap_kernel() */
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vaddr_t pte_va; /* VA */
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};
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/*
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* pv_entry: plug pv_pte into lists.
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*/
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struct pv_entry {
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struct pv_pte pve_pte; /* should be the first member */
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LIST_ENTRY(pv_entry) pve_list; /* on pv_head::pvh_list */
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SLIST_ENTRY(pv_entry) pve_hash;
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};
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#define pve_next pve_list.le_next
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/*
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* pmap_page: a structure which is embedded in each vm_page.
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*/
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struct pmap_page {
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union {
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/* PP_EMBEDDED */
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struct pv_pte u_pte;
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/* !PP_EMBEDDED */
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struct pv_head {
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LIST_HEAD(, pv_entry) pvh_list;
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} u_head;
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/* PTPs */
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struct vm_page *u_link;
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} pp_u;
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#define pp_pte pp_u.u_pte
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#define pp_head pp_u.u_head
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#define pp_link pp_u.u_link
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uint8_t pp_flags;
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uint8_t pp_attrs; /* saved PG_M and PG_U */
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};
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/* pp_flags */
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#define PP_EMBEDDED 1
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#define PMAP_PAGE_INIT(pp) /* none */
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#endif /* !_X86_PMAP_PV_H_ */
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