root / lab4 / .minix-src / include / x86 / pmap_pv.h @ 13
History | View | Annotate | Download (2.53 KB)
| 1 |
/* $NetBSD: pmap_pv.h,v 1.3 2011/06/12 03:35:50 rmind Exp $ */
|
|---|---|
| 2 |
|
| 3 |
/*-
|
| 4 |
* Copyright (c)2008 YAMAMOTO Takashi,
|
| 5 |
* All rights reserved.
|
| 6 |
*
|
| 7 |
* Redistribution and use in source and binary forms, with or without
|
| 8 |
* modification, are permitted provided that the following conditions
|
| 9 |
* are met:
|
| 10 |
* 1. Redistributions of source code must retain the above copyright
|
| 11 |
* notice, this list of conditions and the following disclaimer.
|
| 12 |
* 2. Redistributions in binary form must reproduce the above copyright
|
| 13 |
* notice, this list of conditions and the following disclaimer in the
|
| 14 |
* documentation and/or other materials provided with the distribution.
|
| 15 |
*
|
| 16 |
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
| 17 |
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
| 18 |
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
| 19 |
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
| 20 |
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
| 21 |
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
| 22 |
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
| 23 |
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
| 24 |
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
| 25 |
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
| 26 |
* SUCH DAMAGE.
|
| 27 |
*/
|
| 28 |
|
| 29 |
#ifndef _X86_PMAP_PV_H_
|
| 30 |
#define _X86_PMAP_PV_H_
|
| 31 |
|
| 32 |
#include <sys/mutex.h> |
| 33 |
#include <sys/queue.h> |
| 34 |
|
| 35 |
struct vm_page;
|
| 36 |
|
| 37 |
/*
|
| 38 |
* structures to track P->V mapping
|
| 39 |
*
|
| 40 |
* this file is intended to be minimum as it's included by <machine/vmparam.h>.
|
| 41 |
*/
|
| 42 |
|
| 43 |
/*
|
| 44 |
* pv_pte: describe a pte
|
| 45 |
*/
|
| 46 |
|
| 47 |
struct pv_pte {
|
| 48 |
struct vm_page *pte_ptp; /* PTP; NULL for pmap_kernel() */ |
| 49 |
vaddr_t pte_va; /* VA */
|
| 50 |
}; |
| 51 |
|
| 52 |
/*
|
| 53 |
* pv_entry: plug pv_pte into lists.
|
| 54 |
*/
|
| 55 |
|
| 56 |
struct pv_entry {
|
| 57 |
struct pv_pte pve_pte; /* should be the first member */ |
| 58 |
LIST_ENTRY(pv_entry) pve_list; /* on pv_head::pvh_list */
|
| 59 |
SLIST_ENTRY(pv_entry) pve_hash; |
| 60 |
}; |
| 61 |
#define pve_next pve_list.le_next
|
| 62 |
|
| 63 |
/*
|
| 64 |
* pmap_page: a structure which is embedded in each vm_page.
|
| 65 |
*/
|
| 66 |
|
| 67 |
struct pmap_page {
|
| 68 |
union {
|
| 69 |
/* PP_EMBEDDED */
|
| 70 |
struct pv_pte u_pte;
|
| 71 |
|
| 72 |
/* !PP_EMBEDDED */
|
| 73 |
struct pv_head {
|
| 74 |
LIST_HEAD(, pv_entry) pvh_list; |
| 75 |
} u_head; |
| 76 |
|
| 77 |
/* PTPs */
|
| 78 |
struct vm_page *u_link;
|
| 79 |
} pp_u; |
| 80 |
#define pp_pte pp_u.u_pte
|
| 81 |
#define pp_head pp_u.u_head
|
| 82 |
#define pp_link pp_u.u_link
|
| 83 |
uint8_t pp_flags; |
| 84 |
uint8_t pp_attrs; /* saved PG_M and PG_U */
|
| 85 |
}; |
| 86 |
|
| 87 |
/* pp_flags */
|
| 88 |
#define PP_EMBEDDED 1 |
| 89 |
|
| 90 |
#define PMAP_PAGE_INIT(pp) /* none */ |
| 91 |
|
| 92 |
#endif /* !_X86_PMAP_PV_H_ */ |