1 /*-
2 * Copyright (c) 1991 Regents of the University of California.
3 * All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * the Systems Programming Group of the University of Utah Computer
7 * Science Department and William Jolitz of UUNET Technologies Inc.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * $FreeBSD$
34 */
35
36 #ifndef _MACHINE_PMAP_H_
37 #define _MACHINE_PMAP_H_
38
39 #include <machine/pte.h>
40
41 #ifndef LOCORE
42
43 #include <sys/queue.h>
44 #include <sys/_cpuset.h>
45 #include <sys/_lock.h>
46 #include <sys/_mutex.h>
47 #include <sys/_pv_entry.h>
48
49 #include <vm/_vm_radix.h>
50
51 #ifdef _KERNEL
52
53 #define vtophys(va) pmap_kextract((vm_offset_t)(va))
54
55 #endif
56
57 #define pmap_page_get_memattr(m) ((m)->md.pv_memattr)
58 #define pmap_page_is_write_mapped(m) (((m)->a.flags & PGA_WRITEABLE) != 0)
59 void pmap_page_set_memattr(vm_page_t m, vm_memattr_t ma);
60
61 /*
62 * Pmap stuff
63 */
64
65 struct md_page {
66 TAILQ_HEAD(,pv_entry) pv_list;
67 int pv_gen;
68 vm_memattr_t pv_memattr;
69 };
70
71 /*
72 * This structure is used to hold a virtual<->physical address
73 * association and is used mostly by bootstrap code
74 */
75 struct pv_addr {
76 SLIST_ENTRY(pv_addr) pv_list;
77 vm_offset_t pv_va;
78 vm_paddr_t pv_pa;
79 };
80
81 struct pmap {
82 struct mtx pm_mtx;
83 struct pmap_statistics pm_stats; /* pmap statictics */
84 pd_entry_t *pm_top; /* top-level page table page */
85 u_long pm_satp; /* value for SATP register */
86 cpuset_t pm_active; /* active on cpus */
87 TAILQ_HEAD(,pv_chunk) pm_pvchunk; /* list of mappings in pmap */
88 LIST_ENTRY(pmap) pm_list; /* List of all pmaps */
89 struct vm_radix pm_root;
90 };
91
92 typedef struct pmap *pmap_t;
93
94 #ifdef _KERNEL
95 extern struct pmap kernel_pmap_store;
96 #define kernel_pmap (&kernel_pmap_store)
97 #define pmap_kernel() kernel_pmap
98
99 #define PMAP_ASSERT_LOCKED(pmap) \
100 mtx_assert(&(pmap)->pm_mtx, MA_OWNED)
101 #define PMAP_LOCK(pmap) mtx_lock(&(pmap)->pm_mtx)
102 #define PMAP_LOCK_ASSERT(pmap, type) \
103 mtx_assert(&(pmap)->pm_mtx, (type))
104 #define PMAP_LOCK_DESTROY(pmap) mtx_destroy(&(pmap)->pm_mtx)
105 #define PMAP_LOCK_INIT(pmap) mtx_init(&(pmap)->pm_mtx, "pmap", \
106 NULL, MTX_DEF | MTX_DUPOK)
107 #define PMAP_OWNED(pmap) mtx_owned(&(pmap)->pm_mtx)
108 #define PMAP_MTX(pmap) (&(pmap)->pm_mtx)
109 #define PMAP_TRYLOCK(pmap) mtx_trylock(&(pmap)->pm_mtx)
110 #define PMAP_UNLOCK(pmap) mtx_unlock(&(pmap)->pm_mtx)
111
112 extern vm_offset_t virtual_avail;
113 extern vm_offset_t virtual_end;
114
115 /*
116 * Macros to test if a mapping is mappable with an L1 Section mapping
117 * or an L2 Large Page mapping.
118 */
119 #define L1_MAPPABLE_P(va, pa, size) \
120 ((((va) | (pa)) & L1_OFFSET) == 0 && (size) >= L1_SIZE)
121
122 enum pmap_mode {
123 PMAP_MODE_SV39,
124 PMAP_MODE_SV48,
125 };
126
127 extern enum pmap_mode pmap_mode;
128
129 /* Check if an address resides in a mappable region. */
130 #define VIRT_IS_VALID(va) \
131 ((va) < (pmap_mode == PMAP_MODE_SV39 ? VM_MAX_USER_ADDRESS_SV39 : \
132 VM_MAX_USER_ADDRESS_SV48) || (va) >= VM_MIN_KERNEL_ADDRESS)
133
134 struct thread;
135
136 #define pmap_vm_page_alloc_check(m)
137
138 void pmap_activate_boot(pmap_t);
139 void pmap_activate_sw(struct thread *);
140 void pmap_bootstrap(vm_offset_t, vm_paddr_t, vm_size_t);
141 int pmap_change_attr(vm_offset_t va, vm_size_t size, int mode);
142 void pmap_kenter(vm_offset_t sva, vm_size_t size, vm_paddr_t pa, int mode);
143 void pmap_kenter_device(vm_offset_t, vm_size_t, vm_paddr_t);
144 vm_paddr_t pmap_kextract(vm_offset_t va);
145 void pmap_kremove(vm_offset_t);
146 void pmap_kremove_device(vm_offset_t, vm_size_t);
147 void *pmap_mapdev_attr(vm_paddr_t pa, vm_size_t size, vm_memattr_t ma);
148 bool pmap_page_is_mapped(vm_page_t m);
149 bool pmap_ps_enabled(pmap_t);
150
151 void *pmap_mapdev(vm_paddr_t, vm_size_t);
152 void *pmap_mapbios(vm_paddr_t, vm_size_t);
153 void pmap_unmapdev(void *, vm_size_t);
154 void pmap_unmapbios(void *, vm_size_t);
155
156 boolean_t pmap_map_io_transient(vm_page_t *, vm_offset_t *, int, boolean_t);
157 void pmap_unmap_io_transient(vm_page_t *, vm_offset_t *, int, boolean_t);
158
159 bool pmap_get_tables(pmap_t, vm_offset_t, pd_entry_t **, pd_entry_t **,
160 pt_entry_t **);
161
162 int pmap_fault(pmap_t, vm_offset_t, vm_prot_t);
163
164 static inline int
165 pmap_vmspace_copy(pmap_t dst_pmap __unused, pmap_t src_pmap __unused)
166 {
167
168 return (0);
169 }
170
171 #endif /* _KERNEL */
172
173 #endif /* !LOCORE */
174
175 #endif /* !_MACHINE_PMAP_H_ */
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