pmap.h revision 1.20
1 /* $NetBSD: pmap.h,v 1.20 2021/03/19 07:51:33 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 UVMHIST_DECL(pmapsegtabhist); 82 #endif 83 84 /* 85 * The user address space is mapped using a two level structure where 86 * virtual address bits 31..22 are used to index into a segment table which 87 * points to a page worth of PTEs (4096 page can hold 1024 PTEs). 88 * Bits 21..12 are then used to index a PTE which describes a page within 89 * a segment. 90 */ 91 92 #define pmap_trunc_seg(x) ((vaddr_t)(x) & ~SEGOFSET) 93 #define pmap_round_seg(x) (((vaddr_t)(x) + SEGOFSET) & ~SEGOFSET) 94 95 /* 96 * Each seg_tab point an array of pt_entry [NPTEPG] 97 */ 98 typedef union pmap_segtab { 99 union pmap_segtab * seg_seg[PMAP_SEGTABSIZE]; 100 pt_entry_t * seg_tab[PMAP_SEGTABSIZE]; 101 } pmap_segtab_t; 102 103 #ifdef _KERNEL 104 struct pmap; 105 typedef bool (*pte_callback_t)(struct pmap *, vaddr_t, vaddr_t, 106 pt_entry_t *, uintptr_t); 107 108 /* 109 * Common part of the bootstraping the system enough to run with 110 * virtual memory. 111 */ 112 void pmap_bootstrap_common(void); 113 pt_entry_t *pmap_pte_lookup(struct pmap *, vaddr_t); 114 pt_entry_t *pmap_pte_reserve(struct pmap *, vaddr_t, int); 115 void pmap_pte_process(struct pmap *, vaddr_t, vaddr_t, pte_callback_t, 116 uintptr_t); 117 void pmap_segtab_activate(struct pmap *, struct lwp *); 118 void pmap_segtab_deactivate(struct pmap *); 119 void pmap_segtab_init(struct pmap *); 120 void pmap_segtab_destroy(struct pmap *, pte_callback_t, uintptr_t); 121 extern kmutex_t pmap_segtab_lock; 122 #endif /* _KERNEL */ 123 124 #ifdef MULTIPROCESSOR 125 #include <sys/kcpuset.h> 126 #endif 127 #include <uvm/pmap/pmap_tlb.h> 128 129 /* 130 * Machine dependent pmap structure. 131 */ 132 struct pmap { 133 #ifdef MULTIPROCESSOR 134 kcpuset_t *pm_active; /* pmap was active on ... */ 135 kcpuset_t *pm_onproc; /* pmap is active on ... */ 136 volatile u_int pm_shootdown_pending; 137 #endif 138 pmap_segtab_t * pm_segtab; /* pointers to pages of PTEs */ 139 u_int pm_count; /* pmap reference count */ 140 u_int pm_flags; 141 #define PMAP_DEFERRED_ACTIVATE __BIT(0) 142 struct pmap_statistics pm_stats; /* pmap statistics */ 143 vaddr_t pm_minaddr; 144 vaddr_t pm_maxaddr; 145 #ifdef __HAVE_PMAP_MD 146 struct pmap_md pm_md; 147 #endif 148 struct pmap_asid_info pm_pai[1]; 149 }; 150 151 #ifdef _KERNEL 152 struct pmap_kernel { 153 struct pmap kernel_pmap; 154 #if defined(MULTIPROCESSOR) && PMAP_TLB_MAX > 1 155 struct pmap_asid_info kernel_pai[PMAP_TLB_MAX-1]; 156 #endif 157 }; 158 159 struct pmap_limits { 160 paddr_t avail_start; 161 paddr_t avail_end; 162 vaddr_t virtual_start; 163 vaddr_t virtual_end; 164 }; 165 166 /* 167 * Initialize the kernel pmap. 168 */ 169 #ifdef MULTIPROCESSOR 170 #define PMAP_SIZE offsetof(struct pmap, pm_pai[PMAP_TLB_MAX]) 171 #else 172 #define PMAP_SIZE sizeof(struct pmap) 173 #endif 174 175 /* 176 * The pools from which pmap structures and sub-structures are allocated. 177 */ 178 extern struct pool pmap_pmap_pool; 179 extern struct pool pmap_pv_pool; 180 extern struct pool_allocator pmap_pv_page_allocator; 181 182 extern struct pmap_kernel kernel_pmap_store; 183 extern struct pmap_limits pmap_limits; 184 185 extern u_int pmap_page_colormask; 186 187 extern pmap_segtab_t pmap_kern_segtab; 188 189 /* 190 * The current top of kernel VM 191 */ 192 extern vaddr_t pmap_curmaxkvaddr; 193 194 #define pmap_wired_count(pmap) ((pmap)->pm_stats.wired_count) 195 #define pmap_resident_count(pmap) ((pmap)->pm_stats.resident_count) 196 197 bool pmap_remove_all(pmap_t); 198 void pmap_set_modified(paddr_t); 199 bool pmap_page_clear_attributes(struct vm_page_md *, u_int); 200 void pmap_page_set_attributes(struct vm_page_md *, u_int); 201 void pmap_pvlist_lock_init(size_t); 202 #ifdef PMAP_VIRTUAL_CACHE_ALIASES 203 void pmap_page_cache(struct vm_page_md *, bool); 204 #endif 205 206 #ifdef __HAVE_PMAP_PV_TRACK 207 void pmap_pv_protect(paddr_t, vm_prot_t); 208 #endif 209 210 #define PMAP_WB 0 211 #define PMAP_WBINV 1 212 #define PMAP_INV 2 213 214 //uint16_t pmap_pvlist_lock(struct vm_page_md *, bool); 215 kmutex_t *pmap_pvlist_lock_addr(struct vm_page_md *); 216 217 #define PMAP_STEAL_MEMORY /* enable pmap_steal_memory() */ 218 #define PMAP_GROWKERNEL /* enable pmap_growkernel() */ 219 220 /* 221 * Alternate mapping hooks for pool pages. Avoids thrashing the TLB. 222 */ 223 vaddr_t pmap_map_poolpage(paddr_t); 224 paddr_t pmap_unmap_poolpage(vaddr_t); 225 struct vm_page *pmap_md_alloc_poolpage(int); 226 #define PMAP_ALLOC_POOLPAGE(flags) pmap_md_alloc_poolpage(flags) 227 #define PMAP_MAP_POOLPAGE(pa) pmap_map_poolpage(pa) 228 #define PMAP_UNMAP_POOLPAGE(va) pmap_unmap_poolpage(va) 229 230 #define PMAP_COUNT(name) (pmap_evcnt_##name.ev_count++ + 0) 231 #define PMAP_COUNTER(name, desc) \ 232 struct evcnt pmap_evcnt_##name = \ 233 EVCNT_INITIALIZER(EVCNT_TYPE_MISC, NULL, "pmap", desc); \ 234 EVCNT_ATTACH_STATIC(pmap_evcnt_##name) 235 236 #endif /* _KERNEL */ 237 #endif /* _UVM_PMAP_PMAP_H_ */ 238
Indexes created Mon Sep 29 21:09:56 GMT 2025