root / lab4 / .minix-src / include / x86 / pmap_pv.h @ 13
History | View | Annotate | Download (2.53 KB)
| 1 | 13 | up20180614 | /* $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_ */ |