1 /* $OpenBSD: pmap.h,v 1.21 2023/12/11 22:12:53 kettenis Exp $ */
2 /* $NetBSD: pmap.h,v 1.28 2006/04/10 23:12:11 uwe Exp $ */
3
4 /*-
5 * Copyright (c) 2002 The NetBSD Foundation, Inc.
6 * All rights reserved.
7 *
8 * This code is derived from software contributed to The NetBSD Foundation
9 * by UCHIYAMA Yasushi.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGE.
31 */
32
33 /*
34 * OpenBSD/sh pmap:
35 * pmap.pm_ptp[512] ... 512 slot of page table page
36 * page table page contains 1024 PTEs. (PAGE_SIZE / sizeof(pt_entry_t))
37 * | PTP 11bit | PTOFSET 10bit | PAGE_MASK 12bit |
38 */
39
40 #ifndef _SH_PMAP_H_
41 #define _SH_PMAP_H_
42
43 #include <sh/pte.h>
44
45 #ifdef _KERNEL
46 #include <sys/queue.h>
47
48 #define PMAP_CHECK_COPYIN 1
49
50 #define PMAP_STEAL_MEMORY
51 #define PMAP_GROWKERNEL
52
53 #define __PMAP_PTP_N 512 /* # of page table page maps 2GB. */
54 typedef struct pmap {
55 pt_entry_t **pm_ptp;
56 int pm_asid;
57 int pm_refcnt;
58 struct pmap_statistics pm_stats; /* pmap statistics */
59 } *pmap_t;
60 extern struct pmap __pmap_kernel;
61
62 void pmap_bootstrap(void);
63 #define pmap_init_percpu() do { /* nothing */ } while (0)
64 #define pmap_unuse_final(p) do { /* nothing */ } while (0)
65 #define pmap_remove_holes(vm) do { /* nothing */ } while (0)
66 #define pmap_kernel() (&__pmap_kernel)
67 #define pmap_deactivate(pmap) do { /* nothing */ } while (0)
68 #define pmap_update(pmap) do { /* nothing */ } while (0)
69 #define pmap_wired_count(pmap) ((pmap)->pm_stats.wired_count)
70 #define pmap_resident_count(pmap) ((pmap)->pm_stats.resident_count)
71
72 static __inline void
pmap_remove_all(struct pmap * pmap)73 pmap_remove_all(struct pmap *pmap)
74 {
75 /* Nothing. */
76 }
77
78 /*
79 * Avoid virtual cache aliases on SH4 CPUs
80 * which have the virtually-indexed cache.
81 */
82 #ifdef SH4
83 #define PMAP_PREFER
84 vaddr_t pmap_prefer_align(void);
85 vaddr_t pmap_prefer_offset(vaddr_t);
86
87 /* pmap prefer alignment */
88 #define PMAP_PREFER_ALIGN() pmap_prefer_align()
89 /* pmap prefer offset in alignment */
90 #define PMAP_PREFER_OFFSET(of) pmap_prefer_offset(of)
91 #endif /* SH4 */
92
93 #define __HAVE_PMAP_DIRECT
94 vaddr_t pmap_map_direct(vm_page_t);
95 vm_page_t pmap_unmap_direct(vaddr_t);
96
97 /* MD pmap utils. */
98 pt_entry_t *__pmap_pte_lookup(pmap_t, vaddr_t);
99 pt_entry_t *__pmap_kpte_lookup(vaddr_t);
100 boolean_t __pmap_pte_load(pmap_t, vaddr_t, int);
101
102 #endif /* !_KERNEL */
103
104 #define PG_PMAP_REF PG_PMAP0
105 #define PG_PMAP_MOD PG_PMAP1
106
107 #ifndef _LOCORE
108 struct pv_entry;
109 struct vm_page_md {
110 SLIST_HEAD(, pv_entry) pvh_head;
111 };
112
113 #define VM_MDPAGE_INIT(pg) \
114 do { \
115 struct vm_page_md *pvh = &(pg)->mdpage; \
116 SLIST_INIT(&pvh->pvh_head); \
117 } while (/*CONSTCOND*/0)
118 #endif /* _LOCORE */
119
120 #endif /* !_SH_PMAP_H_ */
121