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 * 3. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgement:
19 * This product includes software developed by the University of
20 * California, Berkeley and its contributors.
21 * 4. Neither the name of the University nor the names of its contributors
22 * may be used to endorse or promote products derived from this software
23 * without specific prior written permission.
25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 * Derived from hp300 version by Mike Hibler, this version by William
38 * Jolitz uses a recursive map [a pde points to the page directory] to
39 * map the page tables using the pagetables themselves. This is done to
40 * reduce the impact on kernel virtual memory for lots of sparse address
41 * space, and to reduce the cost of memory to each process.
43 * from: hp300: @(#)pmap.h 7.2 (Berkeley) 12/16/90
44 * from: @(#)pmap.h 7.4 (Berkeley) 5/12/91
45 * $FreeBSD: src/sys/i386/include/pmap.h,v 1.65.2.3 2001/10/03 07:15:37 peter Exp $
46 * $DragonFly: src/sys/platform/vkernel/include/pmap.h,v 1.4 2007/07/01 02:51:44 dillon Exp $
49 #ifndef _MACHINE_PMAP_H_
50 #define _MACHINE_PMAP_H_
57 #define KVADDR(l4, l3, l2, l1) ( \
58 ((unsigned long)-1 << 47) | \
59 ((unsigned long)(l4) << PML4SHIFT) | \
60 ((unsigned long)(l3) << PDPSHIFT) | \
61 ((unsigned long)(l2) << PDRSHIFT) | \
62 ((unsigned long)(l1) << PAGE_SHIFT))
64 #define UVADDR(l4, l3, l2, l1) ( \
65 ((unsigned long)(l4) << PML4SHIFT) | \
66 ((unsigned long)(l3) << PDPSHIFT) | \
67 ((unsigned long)(l2) << PDRSHIFT) | \
68 ((unsigned long)(l1) << PAGE_SHIFT))
71 * Initial number of kernel page tables. NKPT is now calculated in the
74 * Give NKPDPE a generous value, allowing the kernel to map up to 128G.
76 #define NKPML4E 1 /* number of kernel PML4 slots */
77 #define NKPDPE 128 /* number of kernel PDP slots */
79 #define NUPML4E (NPML4EPG/2) /* number of userland PML4 pages */
80 #define NUPDPE (NUPML4E*NPDPEPG)/* number of userland PDP pages */
81 #define NUPDE (NUPDPE*NPDEPG) /* number of userland PD entries */
83 #define NDMPML4E 1 /* number of dmap PML4 slots */
86 * The *PML4I values control the layout of virtual memory
88 #define PML4PML4I (NPML4EPG/2) /* Index of recursive pml4 mapping */
94 #include <sys/types.h>
97 #include <sys/queue.h>
99 #ifndef _SYS_SPINLOCK_H_
100 #include <sys/spinlock.h>
102 #ifndef _SYS_THREAD_H_
103 #include <sys/thread.h>
105 #ifndef _SYS_VKERNEL_H_
106 #include <sys/vkernel.h>
108 #ifndef _MACHINE_TYPES_H_
109 #include <machine/types.h>
111 #ifndef _MACHINE_PARAM_H_
112 #include <machine/param.h>
117 vm_paddr_t pmap_kextract(vm_offset_t);
122 #define vtophys(va) pmap_kextract(((vm_offset_t)(va)))
123 #define vtophys_pte(va) ((pt_entry_t)pmap_kextract(((vm_offset_t)(va))))
127 #define pte_load_clear(pte) atomic_readandclear_long(pte)
138 TAILQ_HEAD(,pv_entry) pv_list;
142 * Each machine dependent implementation is expected to
143 * keep certain statistics. They may do this anyway they
144 * so choose, but are expected to return the statistics
145 * in the following structure.
147 struct pmap_statistics {
148 long resident_count; /* # of pages mapped (total) */
149 long wired_count; /* # of pages wired */
151 typedef struct pmap_statistics *pmap_statistics_t;
154 pml4_entry_t *pm_pml4; /* KVA of level 4 page table */
155 struct vm_page *pm_pdirm; /* VM page for pg directory */
156 vpte_t pm_pdirpte; /* pte mapping phys page */
157 struct vm_object *pm_pteobj; /* Container for pte's */
158 TAILQ_ENTRY(pmap) pm_pmnode; /* list of pmaps */
159 TAILQ_HEAD(,pv_entry) pm_pvlist; /* list of mappings in pmap */
160 TAILQ_HEAD(,pv_entry) pm_pvlist_free; /* free mappings */
161 int pm_count; /* reference count */
162 cpumask_t pm_active; /* active on cpus */
163 vm_pindex_t pm_pdindex; /* page dir page in obj */
164 struct pmap_statistics pm_stats; /* pmap statistics */
165 struct vm_page *pm_ptphint; /* pmap ptp hint */
166 int pm_generation; /* detect pvlist deletions */
167 struct spinlock pm_spin;
168 struct lwkt_token pm_token;
171 #define pmap_resident_count(pmap) (pmap)->pm_stats.resident_count
173 #define CPUMASK_LOCK CPUMASK(SMP_MAXCPU)
174 #define CPUMASK_BIT SMP_MAXCPU /* 1 << SMP_MAXCPU */
176 typedef struct pmap *pmap_t;
179 extern struct pmap kernel_pmap;
183 * For each vm_page_t, there is a list of all currently valid virtual
184 * mappings of that page. An entry is a pv_entry_t, the list is pv_table.
186 typedef struct pv_entry {
187 pmap_t pv_pmap; /* pmap where mapping lies */
188 vm_offset_t pv_va; /* virtual address for mapping */
189 TAILQ_ENTRY(pv_entry) pv_list;
190 TAILQ_ENTRY(pv_entry) pv_plist;
191 struct vm_page *pv_ptem; /* VM page for pte */
196 extern caddr_t CADDR1;
197 extern pt_entry_t *CMAP1;
198 extern char *ptvmmap; /* poor name! */
199 extern vm_offset_t clean_sva;
200 extern vm_offset_t clean_eva;
202 void pmap_bootstrap(vm_paddr_t *, int64_t);
203 void *pmap_mapdev (vm_paddr_t, vm_size_t);
204 void pmap_unmapdev (vm_offset_t, vm_size_t);
205 void pmap_release(struct pmap *pmap);
206 struct vm_page *pmap_use_pt (pmap_t, vm_offset_t);
212 #endif /* !_MACHINE_PMAP_H_ */