minix/sys/arch/x86/include/pmap_pv.h
Ben Gras 1cd76c7513 sys/arch/x86/include updates
. primary purpose is to synchronize with <ieeefp.h> which
	  expects a fp_prec from sys/arch/x86/include/ieeefp.h
2013-01-15 12:14:01 +00:00

92 lines
2.5 KiB
C

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