2 * Copyright (c) 1991 Regents of the University of California.
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.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
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 * 4. 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.
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
33 * Derived from hp300 version by Mike Hibler, this version by William
34 * Jolitz uses a recursive map [a pde points to the page directory] to
35 * map the page tables using the pagetables themselves. This is done to
36 * reduce the impact on kernel virtual memory for lots of sparse address
37 * space, and to reduce the cost of memory to each process.
39 * from: hp300: @(#)pmap.h 7.2 (Berkeley) 12/16/90
40 * from: @(#)pmap.h 7.4 (Berkeley) 5/12/91
41 * from: i386 pmap.h,v 1.54 1997/11/20 19:30:35 bde Exp
45 #ifndef _MACHINE_PMAP_H_
46 #define _MACHINE_PMAP_H_
48 #include <sys/queue.h>
49 #include <sys/_lock.h>
50 #include <sys/_mutex.h>
51 #include <machine/atomic.h>
52 #include <machine/pte.h>
57 #define NKPT 30 /* initial number of kernel page tables */
59 #define MAXKPT (PAGE_SIZE/sizeof(vm_offset_t))
61 #define vtophys(va) pmap_kextract((vm_offset_t)(va))
72 TAILQ_HEAD(,pv_entry) pv_list;
77 TAILQ_HEAD(,pv_entry) pm_pvlist; /* list of mappings in pmap */
78 u_int32_t pm_rid[5]; /* base RID for pmap */
79 struct pmap_statistics pm_stats; /* pmap statistics */
82 typedef struct pmap *pmap_t;
85 extern struct pmap kernel_pmap_store;
86 #define kernel_pmap (&kernel_pmap_store)
88 #define PMAP_LOCK(pmap) mtx_lock(&(pmap)->pm_mtx)
89 #define PMAP_LOCK_ASSERT(pmap, type) \
90 mtx_assert(&(pmap)->pm_mtx, (type))
91 #define PMAP_LOCK_DESTROY(pmap) mtx_destroy(&(pmap)->pm_mtx)
92 #define PMAP_LOCK_INIT(pmap) mtx_init(&(pmap)->pm_mtx, "pmap", \
94 #define PMAP_LOCKED(pmap) mtx_owned(&(pmap)->pm_mtx)
95 #define PMAP_MTX(pmap) (&(pmap)->pm_mtx)
96 #define PMAP_TRYLOCK(pmap) mtx_trylock(&(pmap)->pm_mtx)
97 #define PMAP_UNLOCK(pmap) mtx_unlock(&(pmap)->pm_mtx)
101 * For each vm_page_t, there is a list of all currently valid virtual
102 * mappings of that page. An entry is a pv_entry_t, the list is pv_list.
104 typedef struct pv_entry {
105 pmap_t pv_pmap; /* pmap where mapping lies */
106 vm_offset_t pv_va; /* virtual address for mapping */
107 TAILQ_ENTRY(pv_entry) pv_list;
108 TAILQ_ENTRY(pv_entry) pv_plist;
113 extern vm_offset_t phys_avail[];
114 extern vm_offset_t virtual_avail;
115 extern vm_offset_t virtual_end;
117 extern uint64_t pmap_vhpt_base[];
118 extern int pmap_vhpt_log2size;
120 #define pmap_page_get_memattr(m) VM_MEMATTR_DEFAULT
121 #define pmap_page_is_mapped(m) (!TAILQ_EMPTY(&(m)->md.pv_list))
122 #define pmap_page_set_memattr(m, ma) (void)0
123 #define pmap_mapbios(pa, sz) pmap_mapdev(pa, sz)
124 #define pmap_unmapbios(va, sz) pmap_unmapdev(va, sz)
126 vm_offset_t pmap_steal_memory(vm_size_t);
127 vm_offset_t pmap_alloc_vhpt(void);
128 void pmap_bootstrap(void);
129 void pmap_kenter(vm_offset_t va, vm_offset_t pa);
130 vm_paddr_t pmap_kextract(vm_offset_t va);
131 void pmap_kremove(vm_offset_t);
132 void pmap_setdevram(unsigned long long basea, vm_offset_t sizea);
133 int pmap_uses_prom_console(void);
134 void *pmap_mapdev(vm_paddr_t, vm_size_t);
135 void pmap_unmapdev(vm_offset_t, vm_size_t);
136 unsigned *pmap_pte(pmap_t, vm_offset_t) __pure2;
137 void pmap_set_opt (unsigned *);
138 void pmap_set_opt_bsp (void);
139 struct pmap *pmap_switch(struct pmap *pmap);
143 #endif /* !_MACHINE_PMAP_H_ */