xref: /freebsd/sys/arm64/include/pmap.h (revision f6a3b357e9be4c6423c85eff9a847163a0d307c8)
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/_lock.h>
45 #include <sys/_mutex.h>
46 
47 #include <vm/_vm_radix.h>
48 
49 #ifdef _KERNEL
50 
51 #define	vtophys(va)	pmap_kextract((vm_offset_t)(va))
52 
53 #endif
54 
55 #define	pmap_page_get_memattr(m)	((m)->md.pv_memattr)
56 #define	pmap_page_is_write_mapped(m)	(((m)->aflags & PGA_WRITEABLE) != 0)
57 void pmap_page_set_memattr(vm_page_t m, vm_memattr_t ma);
58 
59 /*
60  * Pmap stuff
61  */
62 
63 struct md_page {
64 	TAILQ_HEAD(,pv_entry)	pv_list;
65 	int			pv_gen;
66 	vm_memattr_t		pv_memattr;
67 };
68 
69 /*
70  * This structure is used to hold a virtual<->physical address
71  * association and is used mostly by bootstrap code
72  */
73 struct pv_addr {
74 	SLIST_ENTRY(pv_addr) pv_list;
75 	vm_offset_t	pv_va;
76 	vm_paddr_t	pv_pa;
77 };
78 
79 
80 struct pmap {
81 	struct mtx		pm_mtx;
82 	struct pmap_statistics	pm_stats;	/* pmap statictics */
83 	pd_entry_t		*pm_l0;
84 	TAILQ_HEAD(,pv_chunk)	pm_pvchunk;	/* list of mappings in pmap */
85 	struct vm_radix		pm_root;	/* spare page table pages */
86 };
87 typedef struct pmap *pmap_t;
88 
89 typedef struct pv_entry {
90 	vm_offset_t		pv_va;	/* virtual address for mapping */
91 	TAILQ_ENTRY(pv_entry)	pv_next;
92 } *pv_entry_t;
93 
94 /*
95  * pv_entries are allocated in chunks per-process.  This avoids the
96  * need to track per-pmap assignments.
97  */
98 #define	_NPCM	3
99 #define	_NPCPV	168
100 #define	PV_CHUNK_HEADER							\
101 	pmap_t			pc_pmap;				\
102 	TAILQ_ENTRY(pv_chunk)	pc_list;				\
103 	uint64_t		pc_map[_NPCM];	/* bitmap; 1 = free */	\
104 	TAILQ_ENTRY(pv_chunk)	pc_lru;
105 
106 struct pv_chunk_header {
107 	PV_CHUNK_HEADER
108 };
109 
110 struct pv_chunk {
111 	PV_CHUNK_HEADER
112 	struct pv_entry		pc_pventry[_NPCPV];
113 };
114 
115 struct thread;
116 
117 #ifdef _KERNEL
118 extern struct pmap	kernel_pmap_store;
119 #define	kernel_pmap	(&kernel_pmap_store)
120 #define	pmap_kernel()	kernel_pmap
121 
122 #define	PMAP_ASSERT_LOCKED(pmap) \
123 				mtx_assert(&(pmap)->pm_mtx, MA_OWNED)
124 #define	PMAP_LOCK(pmap)		mtx_lock(&(pmap)->pm_mtx)
125 #define	PMAP_LOCK_ASSERT(pmap, type) \
126 				mtx_assert(&(pmap)->pm_mtx, (type))
127 #define	PMAP_LOCK_DESTROY(pmap)	mtx_destroy(&(pmap)->pm_mtx)
128 #define	PMAP_LOCK_INIT(pmap)	mtx_init(&(pmap)->pm_mtx, "pmap", \
129 				    NULL, MTX_DEF | MTX_DUPOK)
130 #define	PMAP_OWNED(pmap)	mtx_owned(&(pmap)->pm_mtx)
131 #define	PMAP_MTX(pmap)		(&(pmap)->pm_mtx)
132 #define	PMAP_TRYLOCK(pmap)	mtx_trylock(&(pmap)->pm_mtx)
133 #define	PMAP_UNLOCK(pmap)	mtx_unlock(&(pmap)->pm_mtx)
134 
135 extern vm_offset_t virtual_avail;
136 extern vm_offset_t virtual_end;
137 
138 /*
139  * Macros to test if a mapping is mappable with an L1 Section mapping
140  * or an L2 Large Page mapping.
141  */
142 #define	L1_MAPPABLE_P(va, pa, size)					\
143 	((((va) | (pa)) & L1_OFFSET) == 0 && (size) >= L1_SIZE)
144 
145 void	pmap_bootstrap(vm_offset_t, vm_offset_t, vm_paddr_t, vm_size_t);
146 int	pmap_change_attr(vm_offset_t va, vm_size_t size, int mode);
147 void	pmap_kenter(vm_offset_t sva, vm_size_t size, vm_paddr_t pa, int mode);
148 void	pmap_kenter_device(vm_offset_t, vm_size_t, vm_paddr_t);
149 vm_paddr_t pmap_kextract(vm_offset_t va);
150 void	pmap_kremove(vm_offset_t);
151 void	pmap_kremove_device(vm_offset_t, vm_size_t);
152 void	*pmap_mapdev_attr(vm_offset_t pa, vm_size_t size, vm_memattr_t ma);
153 bool	pmap_ps_enabled(pmap_t pmap);
154 
155 void	*pmap_mapdev(vm_offset_t, vm_size_t);
156 void	*pmap_mapbios(vm_paddr_t, vm_size_t);
157 void	pmap_unmapdev(vm_offset_t, vm_size_t);
158 void	pmap_unmapbios(vm_offset_t, vm_size_t);
159 
160 boolean_t pmap_map_io_transient(vm_page_t *, vm_offset_t *, int, boolean_t);
161 void	pmap_unmap_io_transient(vm_page_t *, vm_offset_t *, int, boolean_t);
162 
163 bool	pmap_get_tables(pmap_t, vm_offset_t, pd_entry_t **, pd_entry_t **,
164     pd_entry_t **, pt_entry_t **);
165 
166 int	pmap_fault(pmap_t, uint64_t, uint64_t);
167 
168 struct pcb *pmap_switch(struct thread *, struct thread *);
169 
170 #define	pmap_page_is_mapped(m)	(!TAILQ_EMPTY(&(m)->md.pv_list))
171 
172 static inline int
173 pmap_vmspace_copy(pmap_t dst_pmap __unused, pmap_t src_pmap __unused)
174 {
175 
176 	return (0);
177 }
178 
179 #endif	/* _KERNEL */
180 
181 #endif	/* !LOCORE */
182 
183 #endif	/* !_MACHINE_PMAP_H_ */
184