pmap.h revision 1.9
1 /*- 2 * Copyright (c) 1998, 1999, 2000, 2001 The NetBSD Foundation, Inc. 3 * All rights reserved. 4 * 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. 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 * 18 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 19 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 20 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 21 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 22 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 * POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 /*- 32 * Copyright (c) 1991 Regents of the University of California. 33 * All rights reserved. 34 * 35 * This code is derived from software contributed to Berkeley by 36 * the Systems Programming Group of the University of Utah Computer 37 * Science Department and William Jolitz of UUNET Technologies Inc. 38 * 39 * Redistribution and use in source and binary forms, with or without 40 * modification, are permitted provided that the following conditions 41 * are met: 42 * 1. Redistributions of source code must retain the above copyright 43 * notice, this list of conditions and the following disclaimer. 44 * 2. Redistributions in binary form must reproduce the above copyright 45 * notice, this list of conditions and the following disclaimer in the 46 * documentation and/or other materials provided with the distribution. 47 * 4. Neither the name of the University nor the names of its contributors 48 * may be used to endorse or promote products derived from this software 49 * without specific prior written permission. 50 * 51 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 52 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 53 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 54 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 55 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 56 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 57 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 58 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 59 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 60 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 61 * SUCH DAMAGE. 62 * 63 * Derived from hp300 version by Mike Hibler, this version by William 64 * Jolitz uses a recursive map [a pde points to the page directory] to 65 * map the page tables using the pagetables themselves. This is done to 66 * reduce the impact on kernel virtual memory for lots of sparse address 67 * space, and to reduce the cost of memory to each process. 68 * 69 * from: hp300: @(#)pmap.h 7.2 (Berkeley) 12/16/90 70 * from: @(#)pmap.h 7.4 (Berkeley) 5/12/91 71 * from: i386 pmap.h,v 1.54 1997/11/20 19:30:35 bde Exp 72 * $FreeBSD: releng/10.1/sys/ia64/include/pmap.h 268201 2014-07-02 23:57:55Z marcel $ 73 */ 74 75 #ifndef _IA64_PMAP_H_ 76 #define _IA64_PMAP_H_ 77 78 #include <sys/types.h> 79 #include <sys/queue.h> 80 #include <sys/lock.h> 81 #include <sys/mutex.h> 82 83 #include <machine/pte.h> 84 #include <machine/vmparam.h> 85 86 #include <machine/md_var.h> 87 88 typedef char vm_memattr_t; 89 90 #define VM_MEMATTR_WRITE_BACK ((vm_memattr_t)PTE_MA_WB) 91 #define VM_MEMATTR_UNCACHEABLE ((vm_memattr_t)PTE_MA_UC) 92 #define VM_MEMATTR_UNCACHEABLE_EXPORTED ((vm_memattr_t)PTE_MA_UCE) 93 #define VM_MEMATTR_WRITE_COMBINING ((vm_memattr_t)PTE_MA_WC) 94 #define VM_MEMATTR_NATPAGE ((vm_memattr_t)PTE_MA_NATPAGE) 95 #define VM_MEMATTR_DEFAULT VM_MEMATTR_WRITE_BACK 96 97 #ifdef _KERNEL 98 99 #define MAXKPT (PAGE_SIZE/sizeof(vaddr_t)) 100 101 #define vtophys(va) pmap_kextract((vaddr_t)(va)) 102 103 #endif /* _KERNEL */ 104 105 /* 106 * Pmap stuff 107 */ 108 struct pv_entry; 109 struct pv_chunk; 110 111 struct pmap { 112 kmutex_t pm_mtx; 113 TAILQ_HEAD(,pv_chunk) pm_pvchunk; /* list of mappings in pmap */ 114 uint32_t pm_rid[IA64_VM_MINKERN_REGION]; 115 struct pmap_statistics pm_stats; /* pmap statistics */ 116 uint64_t pm_refcount; /* pmap reference count, atomic */ 117 }; 118 119 typedef struct pmap *pmap_t; 120 121 #ifdef _KERNEL 122 123 #define PMAP_LOCK(pmap) mutex_enter(&(pmap)->pm_mtx) 124 #define PMAP_LOCK_ASSERT(pmap) KASSERT(mutex_owned(&(pmap)->pm_mtx)) 125 #define PMAP_LOCK_DESTROY(pmap) mutex_destroy(&(pmap)->pm_mtx) 126 #define PMAP_LOCK_INIT(pmap) mutex_init(&(pmap)->pm_mtx, MUTEX_DEFAULT, IPL_NONE) 127 #define PMAP_LOCKED(pmap) mutex_owned(&(pmap)->pm_mtx) 128 #define PMAP_MTX(pmap) (&(pmap)->pm_mtx) 129 #define PMAP_TRYLOCK(pmap) mutex_tryenter(&(pmap)->pm_mtx) 130 #define PMAP_UNLOCK(pmap) mutex_exit(&(pmap)->pm_mtx) 131 132 #endif 133 134 /* 135 * For each vm_page_t, there is a list of all currently valid virtual 136 * mappings of that page. An entry is a pv_entry_t, the list is pv_list. 137 */ 138 typedef struct pv_entry { 139 vaddr_t pv_va; /* virtual address for mapping */ 140 TAILQ_ENTRY(pv_entry) pv_list; 141 } *pv_entry_t; 142 143 void pmap_bootstrap(void); 144 145 /* optional pmap API functions, according to pmap(9) */ 146 #define PMAP_STEAL_MEMORY 147 #define PMAP_GROWKERNEL 148 149 #define PMAP_NEED_PROCWR 150 void pmap_procwr(struct proc *, vaddr_t, vsize_t); 151 152 /* 153 * Alternate mapping hooks for pool pages. Avoids thrashing the TLB. 154 */ 155 /* XXX 156 #define PMAP_MAP_POOLPAGE(pa) IA64_PHYS_TO_RR7((pa)) 157 #define PMAP_UNMAP_POOLPAGE(va) IA64_RR_MASK((va)) 158 */ 159 160 /* 161 * Macros for locking pmap structures. 162 * 163 * Note that we if we access the kernel pmap in interrupt context, it 164 * is only to update statistics. Since stats are updated using atomic 165 * operations, locking the kernel pmap is not necessary. Therefore, 166 * it is not necessary to block interrupts when locking pmap strucutres. 167 */ 168 /* XXX 169 #define PMAP_LOCK(pmap) mutex_enter(&(pmap)->pm_slock) 170 #define PMAP_UNLOCK(pmap) mutex_exit(&(pmap)->pm_slock) 171 */ 172 173 /* 174 * pmap-specific data store in the vm_page structure. 175 */ 176 #define __HAVE_VM_PAGE_MD 177 178 struct vm_page_md { 179 TAILQ_HEAD(,pv_entry) pv_list; 180 vm_memattr_t memattr; 181 #if 0 /* XXX freebsd */ 182 uint8_t pv_flags; 183 uint8_t aflags; 184 #endif 185 }; 186 187 #define VM_MDPAGE_INIT(pg) \ 188 do { \ 189 TAILQ_INIT(&(pg)->mdpage.pv_list); \ 190 (pg)->mdpage.memattr = VM_MEMATTR_DEFAULT; \ 191 } while (/*CONSTCOND*/0) 192 193 #ifdef _KERNEL 194 195 extern uint64_t pmap_vhpt_base[]; 196 extern uint64_t pmap_vhpt_log2size; 197 198 vaddr_t pmap_page_to_va(struct vm_page*); 199 200 /* Machine-architecture private */ 201 vaddr_t pmap_alloc_vhpt(void); 202 void pmap_bootstrap(void); 203 void pmap_invalidate_all(void); 204 paddr_t pmap_kextract(vaddr_t va); 205 struct pmap *pmap_switch(struct pmap *pmap); 206 void pmap_remove_all_phys(struct vm_page*); /* used in only pmap_page_protect */ 207 208 #endif /* _KERNEL */ 209 210 #endif /* _IA64_PMAP_H_ */ 211
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