pmap.h revision 1.15
1 /* $NetBSD: pmap.h,v 1.15 2020/07/08 12:12:16 skrll Exp $ */ 2 3 /* 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Ralph Campbell. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)pmap.h 8.1 (Berkeley) 6/10/93 35 */ 36 37 /* 38 * Copyright (c) 1987 Carnegie-Mellon University 39 * 40 * This code is derived from software contributed to Berkeley by 41 * Ralph Campbell. 42 * 43 * Redistribution and use in source and binary forms, with or without 44 * modification, are permitted provided that the following conditions 45 * are met: 46 * 1. Redistributions of source code must retain the above copyright 47 * notice, this list of conditions and the following disclaimer. 48 * 2. Redistributions in binary form must reproduce the above copyright 49 * notice, this list of conditions and the following disclaimer in the 50 * documentation and/or other materials provided with the distribution. 51 * 3. All advertising materials mentioning features or use of this software 52 * must display the following acknowledgement: 53 * This product includes software developed by the University of 54 * California, Berkeley and its contributors. 55 * 4. Neither the name of the University nor the names of its contributors 56 * may be used to endorse or promote products derived from this software 57 * without specific prior written permission. 58 * 59 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 60 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 61 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 62 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 63 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 64 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 65 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 66 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 67 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 68 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 69 * SUCH DAMAGE. 70 * 71 * @(#)pmap.h 8.1 (Berkeley) 6/10/93 72 */ 73 74 #ifndef _UVM_PMAP_PMAP_H_ 75 #define _UVM_PMAP_PMAP_H_ 76 77 #include <uvm/uvm_stat.h> 78 #ifdef UVMHIST 79 UVMHIST_DECL(pmapexechist); 80 UVMHIST_DECL(pmaphist); 81 #endif 82 83 /* 84 * The user address space is mapped using a two level structure where 85 * virtual address bits 31..22 are used to index into a segment table which 86 * points to a page worth of PTEs (4096 page can hold 1024 PTEs). 87 * Bits 21..12 are then used to index a PTE which describes a page within 88 * a segment. 89 */ 90 91 #define pmap_trunc_seg(x) ((vaddr_t)(x) & ~SEGOFSET) 92 #define pmap_round_seg(x) (((vaddr_t)(x) + SEGOFSET) & ~SEGOFSET) 93 94 /* 95 * Each seg_tab point an array of pt_entry [NPTEPG] 96 */ 97 typedef union pmap_segtab { 98 union pmap_segtab * seg_seg[PMAP_SEGTABSIZE]; 99 pt_entry_t * seg_tab[PMAP_SEGTABSIZE]; 100 } pmap_segtab_t; 101 102 #ifdef _KERNEL 103 struct pmap; 104 typedef bool (*pte_callback_t)(struct pmap *, vaddr_t, vaddr_t, 105 pt_entry_t *, uintptr_t); 106 107 /* 108 * Common part of the bootstraping the system enough to run with 109 * virtual memory. 110 */ 111 void pmap_bootstrap_common(void); 112 pt_entry_t *pmap_pte_lookup(struct pmap *, vaddr_t); 113 pt_entry_t *pmap_pte_reserve(struct pmap *, vaddr_t, int); 114 void pmap_pte_process(struct pmap *, vaddr_t, vaddr_t, pte_callback_t, 115 uintptr_t); 116 void pmap_segtab_activate(struct pmap *, struct lwp *); 117 void pmap_segtab_init(struct pmap *); 118 void pmap_segtab_destroy(struct pmap *, pte_callback_t, uintptr_t); 119 extern kmutex_t pmap_segtab_lock; 120 #endif /* _KERNEL */ 121 122 #ifdef MULTIPROCESSOR 123 #include <sys/kcpuset.h> 124 #endif 125 #include <uvm/pmap/pmap_tlb.h> 126 127 /* 128 * Machine dependent pmap structure. 129 */ 130 struct pmap { 131 #ifdef MULTIPROCESSOR 132 kcpuset_t *pm_active; /* pmap was active on ... */ 133 kcpuset_t *pm_onproc; /* pmap is active on ... */ 134 volatile u_int pm_shootdown_pending; 135 #endif 136 pmap_segtab_t * pm_segtab; /* pointers to pages of PTEs */ 137 u_int pm_count; /* pmap reference count */ 138 u_int pm_flags; 139 #define PMAP_DEFERRED_ACTIVATE __BIT(0) 140 struct pmap_statistics pm_stats; /* pmap statistics */ 141 vaddr_t pm_minaddr; 142 vaddr_t pm_maxaddr; 143 #ifdef __HAVE_PMAP_MD 144 struct pmap_md pm_md; 145 #endif 146 struct pmap_asid_info pm_pai[1]; 147 }; 148 149 #ifdef _KERNEL 150 struct pmap_kernel { 151 struct pmap kernel_pmap; 152 #if defined(MULTIPROCESSOR) && PMAP_TLB_MAX > 1 153 struct pmap_asid_info kernel_pai[PMAP_TLB_MAX-1]; 154 #endif 155 }; 156 157 struct pmap_limits { 158 paddr_t avail_start; 159 paddr_t avail_end; 160 vaddr_t virtual_start; 161 vaddr_t virtual_end; 162 }; 163 164 /* 165 * Initialize the kernel pmap. 166 */ 167 #ifdef MULTIPROCESSOR 168 #define PMAP_SIZE offsetof(struct pmap, pm_pai[PMAP_TLB_MAX]) 169 #else 170 #define PMAP_SIZE sizeof(struct pmap) 171 #endif 172 173 /* 174 * The pools from which pmap structures and sub-structures are allocated. 175 */ 176 extern struct pool pmap_pmap_pool; 177 extern struct pool pmap_pv_pool; 178 extern struct pool_allocator pmap_pv_page_allocator; 179 180 extern struct pmap_kernel kernel_pmap_store; 181 extern struct pmap_limits pmap_limits; 182 183 extern u_int pmap_page_colormask; 184 185 extern pmap_segtab_t pmap_kern_segtab; 186 187 #define pmap_wired_count(pmap) ((pmap)->pm_stats.wired_count) 188 #define pmap_resident_count(pmap) ((pmap)->pm_stats.resident_count) 189 190 bool pmap_remove_all(pmap_t); 191 void pmap_set_modified(paddr_t); 192 bool pmap_page_clear_attributes(struct vm_page_md *, u_int); 193 void pmap_page_set_attributes(struct vm_page_md *, u_int); 194 void pmap_pvlist_lock_init(size_t); 195 #ifdef PMAP_VIRTUAL_CACHE_ALIASES 196 void pmap_page_cache(struct vm_page *, bool cached); 197 #endif 198 199 200 #define PMAP_WB 0 201 #define PMAP_WBINV 1 202 #define PMAP_INV 2 203 204 //uint16_t pmap_pvlist_lock(struct vm_page_md *, bool); 205 kmutex_t *pmap_pvlist_lock_addr(struct vm_page_md *); 206 207 #define PMAP_STEAL_MEMORY /* enable pmap_steal_memory() */ 208 #define PMAP_GROWKERNEL /* enable pmap_growkernel() */ 209 210 /* 211 * Alternate mapping hooks for pool pages. Avoids thrashing the TLB. 212 */ 213 vaddr_t pmap_map_poolpage(paddr_t); 214 paddr_t pmap_unmap_poolpage(vaddr_t); 215 struct vm_page *pmap_md_alloc_poolpage(int); 216 #define PMAP_ALLOC_POOLPAGE(flags) pmap_md_alloc_poolpage(flags) 217 #define PMAP_MAP_POOLPAGE(pa) pmap_map_poolpage(pa) 218 #define PMAP_UNMAP_POOLPAGE(va) pmap_unmap_poolpage(va) 219 220 #define PMAP_COUNT(name) (pmap_evcnt_##name.ev_count++ + 0) 221 #define PMAP_COUNTER(name, desc) \ 222 struct evcnt pmap_evcnt_##name = \ 223 EVCNT_INITIALIZER(EVCNT_TYPE_MISC, NULL, "pmap", desc); \ 224 EVCNT_ATTACH_STATIC(pmap_evcnt_##name) 225 226 #endif /* _KERNEL */ 227 #endif /* _UVM_PMAP_PMAP_H_ */ 228
Indexes created Mon Sep 29 21:09:56 GMT 2025