]>
git.proxmox.com Git - mirror_edk2.git/blob - StdLib/Include/Ipf/machine/pmap.h
2 * Copyright (c) 1998, 1999, 2000, 2001 The NetBSD Foundation, Inc.
5 * This code is derived from software contributed to The NetBSD Foundation
6 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
7 * NASA Ames Research Center and by Chris G. Demetriou.
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 NetBSD
20 * Foundation, Inc. and its contributors.
21 * 4. Neither the name of The NetBSD Foundation nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
25 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
26 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
35 * POSSIBILITY OF SUCH DAMAGE.
39 * Copyright (c) 1991 Regents of the University of California.
40 * All rights reserved.
42 * This code is derived from software contributed to Berkeley by
43 * the Systems Programming Group of the University of Utah Computer
44 * Science Department and William Jolitz of UUNET Technologies Inc.
46 * Redistribution and use in source and binary forms, with or without
47 * modification, are permitted provided that the following conditions
49 * 1. Redistributions of source code must retain the above copyright
50 * notice, this list of conditions and the following disclaimer.
51 * 2. Redistributions in binary form must reproduce the above copyright
52 * notice, this list of conditions and the following disclaimer in the
53 * documentation and/or other materials provided with the distribution.
54 * 4. Neither the name of the University nor the names of its contributors
55 * may be used to endorse or promote products derived from this software
56 * without specific prior written permission.
58 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
59 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
60 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
61 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
62 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
63 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
64 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
65 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
66 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
67 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
70 * Derived from hp300 version by Mike Hibler, this version by William
71 * Jolitz uses a recursive map [a pde points to the page directory] to
72 * map the page tables using the pagetables themselves. This is done to
73 * reduce the impact on kernel virtual memory for lots of sparse address
74 * space, and to reduce the cost of memory to each process.
76 * from: hp300: @(#)pmap.h 7.2 (Berkeley) 12/16/90
77 * from: @(#)pmap.h 7.4 (Berkeley) 5/12/91
78 * from: i386 pmap.h,v 1.54 1997/11/20 19:30:35 bde Exp
79 * $FreeBSD: src/sys/ia64/include/pmap.h,v 1.25 2005/09/03 23:53:50 marcel Exp $
82 #ifndef _PMAP_MACHINE_
83 #define _PMAP_MACHINE_
87 paddr_t
vtophys(vaddr_t
);
89 struct pv_entry
; /* Forward declaration. */
92 TAILQ_ENTRY(pmap
) pm_list
; /* list of all pmaps */
93 TAILQ_HEAD(,pv_entry
) pm_pvlist
; /* list of mappings in pmap */
94 int pm_count
; /* pmap reference count */
95 struct simplelock pm_slock
; /* lock on pmap */
96 u_int32_t pm_rid
[5]; /* base RID for pmap */
97 int pm_active
; /* active flag */
98 struct pmap_statistics pm_stats
; /* pmap statistics */
99 unsigned long pm_cpus
; /* mask of CPUs using pmap */
103 typedef struct pmap
*pmap_t
;
106 * For each vm_page_t, there is a list of all currently valid virtual
107 * mappings of that page. An entry is a pv_entry_t, the list is pv_pvlist.
109 typedef struct pv_entry
{
110 pmap_t pv_pmap
; /* pmap where mapping lies */
111 vaddr_t pv_va
; /* virtual address for mapping */
112 TAILQ_ENTRY(pv_entry
) pv_list
;
113 TAILQ_ENTRY(pv_entry
) pv_plist
;
117 #define PGA_MODIFIED 0x01 /* modified */
118 #define PGA_REFERENCED 0x02 /* referenced */
121 extern struct pmap kernel_pmap_store
;
123 #define pmap_kernel() (&kernel_pmap_store)
125 #define pmap_resident_count(pmap) ((pmap)->pm_stats.resident_count)
126 #define pmap_wired_count(pmap) ((pmap)->pm_stats.wired_count)
128 #define pmap_copy(dp, sp, da, l, sa) /* nothing */
129 #define pmap_update(pmap) /* nothing (yet) */
131 void pmap_bootstrap(void);
133 #define pmap_is_referenced(pg) \
134 (((pg)->mdpage.pvh_attrs & PGA_REFERENCED) != 0)
135 #define pmap_is_modified(pg) \
136 (((pg)->mdpage.pvh_attrs & PGA_MODIFIED) != 0)
139 #define PMAP_STEAL_MEMORY /* enable pmap_steal_memory() */
142 * Alternate mapping hooks for pool pages. Avoids thrashing the TLB.
144 #define PMAP_MAP_POOLPAGE(pa) IA64_PHYS_TO_RR7((pa))
145 #define PMAP_UNMAP_POOLPAGE(va) IA64_RR_MASK((va))
148 * Macros for locking pmap structures.
150 * Note that we if we access the kernel pmap in interrupt context, it
151 * is only to update statistics. Since stats are updated using atomic
152 * operations, locking the kernel pmap is not necessary. Therefore,
153 * it is not necessary to block interrupts when locking pmap strucutres.
155 #define PMAP_LOCK(pmap) simple_lock(&(pmap)->pm_slock)
156 #define PMAP_UNLOCK(pmap) simple_unlock(&(pmap)->pm_slock)
159 #define PMAP_VHPT_LOG2SIZE 16
162 #endif /* _PMAP_MACHINE_ */