1 /* $NetBSD: pmap.h,v 1.37 2020/03/14 14:05:43 ad Exp $ */
2
3 /*-
4 * Copyright (c) 2002 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by UCHIYAMA Yasushi.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 /*
33 * NetBSD/sh3 pmap:
34 * pmap.pm_ptp[512] ... 512 slot of page table page
35 * page table page contains 1024 PTEs. (PAGE_SIZE / sizeof(pt_entry_t))
36 * va -> [ PTP 10bit | PTOFSET 10bit | PGOFSET 12bit ]
37 */
38
39 #ifndef _SH3_PMAP_H_
40 #define _SH3_PMAP_H_
41 #include <sys/queue.h>
42 #include <sh3/pte.h>
43
44 #define PMAP_NEED_PROCWR
45 #define PMAP_STEAL_MEMORY
46 #define PMAP_GROWKERNEL
47
48 #define __PMAP_PTP_N 512 /* # of page table page maps 2GB. */
49 struct pmap {
50 pt_entry_t **pm_ptp;
51 int pm_asid;
52 int pm_refcnt;
53 struct pmap_statistics pm_stats; /* pmap statistics */
54 };
55
56 void pmap_bootstrap(void);
57 void pmap_procwr(struct proc *, vaddr_t, size_t);
58 #define pmap_update(pmap) ((void)0)
59 #define pmap_copy(dp,sp,d,l,s) ((void)0)
60 #define pmap_wired_count(pmap) ((pmap)->pm_stats.wired_count)
61 #define pmap_resident_count(pmap) ((pmap)->pm_stats.resident_count)
62
63 /* ARGSUSED */
64 static __inline bool
pmap_remove_all(struct pmap * pmap)65 pmap_remove_all(struct pmap *pmap)
66 {
67 /* Nothing. */
68 return false;
69 }
70
71 /*
72 * pmap_prefer() helps to avoid virtual cache aliases on SH4 CPUs
73 * which have the virtually-indexed cache.
74 */
75 #ifdef SH4
76 #define PMAP_PREFER(pa, va, sz, td) pmap_prefer((pa), (va), (td))
77 void pmap_prefer(vaddr_t, vaddr_t *, int);
78 #endif /* SH4 */
79
80 #define PMAP_MAP_POOLPAGE(pa) SH3_PHYS_TO_P1SEG((pa))
81 #define PMAP_UNMAP_POOLPAGE(va) SH3_P1SEG_TO_PHYS((va))
82
83 /* MD pmap utils. */
84 pt_entry_t *__pmap_pte_lookup(pmap_t, vaddr_t);
85 pt_entry_t *__pmap_kpte_lookup(vaddr_t);
86 bool __pmap_pte_load(pmap_t, vaddr_t, int);
87
88 /* pmap-specific data store in the vm_page structure. */
89 #define __HAVE_VM_PAGE_MD
90 #define PVH_REFERENCED 1
91 #define PVH_MODIFIED 2
92
93 struct pv_entry;
94 struct vm_page_md {
95 SLIST_HEAD(, pv_entry) pvh_head;
96 int pvh_flags;
97 };
98
99 #define VM_MDPAGE_INIT(pg) \
100 do { \
101 struct vm_page_md *pvh = &(pg)->mdpage; \
102 SLIST_INIT(&pvh->pvh_head); \
103 pvh->pvh_flags = 0; \
104 } while (/*CONSTCOND*/0)
105 #endif /* !_SH3_PMAP_H_ */
106