pmap.h revision 336711
1/*- 2 * Copyright (c) 1991 Regents of the University of California. 3 * All rights reserved. 4 * 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. 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 * 3. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * $FreeBSD: stable/11/sys/arm64/include/pmap.h 336711 2018-07-25 15:40:27Z markj $ 34 */ 35 36#ifndef _MACHINE_PMAP_H_ 37#define _MACHINE_PMAP_H_ 38 39#include <machine/pte.h> 40 41#ifndef LOCORE 42 43#include <sys/queue.h> 44#include <sys/_lock.h> 45#include <sys/_mutex.h> 46 47#include <vm/_vm_radix.h> 48 49#ifdef _KERNEL 50 51#define vtophys(va) pmap_kextract((vm_offset_t)(va)) 52 53#endif 54 55#define pmap_page_get_memattr(m) ((m)->md.pv_memattr) 56#define pmap_page_is_write_mapped(m) (((m)->aflags & PGA_WRITEABLE) != 0) 57void pmap_page_set_memattr(vm_page_t m, vm_memattr_t ma); 58 59/* 60 * Pmap stuff 61 */ 62 63struct md_page { 64 TAILQ_HEAD(,pv_entry) pv_list; 65 int pv_gen; 66 vm_memattr_t pv_memattr; 67}; 68 69/* 70 * This structure is used to hold a virtual<->physical address 71 * association and is used mostly by bootstrap code 72 */ 73struct pv_addr { 74 SLIST_ENTRY(pv_addr) pv_list; 75 vm_offset_t pv_va; 76 vm_paddr_t pv_pa; 77}; 78 79 80struct pmap { 81 struct mtx pm_mtx; 82 struct pmap_statistics pm_stats; /* pmap statictics */ 83 pd_entry_t *pm_l0; 84 TAILQ_HEAD(,pv_chunk) pm_pvchunk; /* list of mappings in pmap */ 85 struct vm_radix pm_root; /* spare page table pages */ 86}; 87typedef struct pmap *pmap_t; 88 89typedef struct pv_entry { 90 vm_offset_t pv_va; /* virtual address for mapping */ 91 TAILQ_ENTRY(pv_entry) pv_next; 92} *pv_entry_t; 93 94/* 95 * pv_entries are allocated in chunks per-process. This avoids the 96 * need to track per-pmap assignments. 97 */ 98#define _NPCM 3 99#define _NPCPV 168 100#define PV_CHUNK_HEADER \ 101 pmap_t pc_pmap; \ 102 TAILQ_ENTRY(pv_chunk) pc_list; \ 103 uint64_t pc_map[_NPCM]; /* bitmap; 1 = free */ \ 104 TAILQ_ENTRY(pv_chunk) pc_lru; 105 106struct pv_chunk_header { 107 PV_CHUNK_HEADER 108}; 109 110struct pv_chunk { 111 PV_CHUNK_HEADER 112 struct pv_entry pc_pventry[_NPCPV]; 113}; 114 115#ifdef _KERNEL 116extern struct pmap kernel_pmap_store; 117#define kernel_pmap (&kernel_pmap_store) 118#define pmap_kernel() kernel_pmap 119 120#define PMAP_ASSERT_LOCKED(pmap) \ 121 mtx_assert(&(pmap)->pm_mtx, MA_OWNED) 122#define PMAP_LOCK(pmap) mtx_lock(&(pmap)->pm_mtx) 123#define PMAP_LOCK_ASSERT(pmap, type) \ 124 mtx_assert(&(pmap)->pm_mtx, (type)) 125#define PMAP_LOCK_DESTROY(pmap) mtx_destroy(&(pmap)->pm_mtx) 126#define PMAP_LOCK_INIT(pmap) mtx_init(&(pmap)->pm_mtx, "pmap", \ 127 NULL, MTX_DEF | MTX_DUPOK) 128#define PMAP_OWNED(pmap) mtx_owned(&(pmap)->pm_mtx) 129#define PMAP_MTX(pmap) (&(pmap)->pm_mtx) 130#define PMAP_TRYLOCK(pmap) mtx_trylock(&(pmap)->pm_mtx) 131#define PMAP_UNLOCK(pmap) mtx_unlock(&(pmap)->pm_mtx) 132 133#define PHYS_AVAIL_SIZE 32 134extern vm_paddr_t phys_avail[]; 135extern vm_paddr_t dump_avail[]; 136extern vm_offset_t virtual_avail; 137extern vm_offset_t virtual_end; 138 139/* 140 * Macros to test if a mapping is mappable with an L1 Section mapping 141 * or an L2 Large Page mapping. 142 */ 143#define L1_MAPPABLE_P(va, pa, size) \ 144 ((((va) | (pa)) & L1_OFFSET) == 0 && (size) >= L1_SIZE) 145 146void pmap_bootstrap(vm_offset_t, vm_offset_t, vm_paddr_t, vm_size_t); 147void pmap_kenter_device(vm_offset_t, vm_size_t, vm_paddr_t); 148vm_paddr_t pmap_kextract(vm_offset_t va); 149void pmap_kremove(vm_offset_t); 150void pmap_kremove_device(vm_offset_t, vm_size_t); 151 152void *pmap_mapdev(vm_offset_t, vm_size_t); 153void *pmap_mapbios(vm_paddr_t, vm_size_t); 154void pmap_unmapdev(vm_offset_t, vm_size_t); 155void pmap_unmapbios(vm_offset_t, vm_size_t); 156 157boolean_t pmap_map_io_transient(vm_page_t *, vm_offset_t *, int, boolean_t); 158void pmap_unmap_io_transient(vm_page_t *, vm_offset_t *, int, boolean_t); 159 160bool pmap_get_tables(pmap_t, vm_offset_t, pd_entry_t **, pd_entry_t **, 161 pd_entry_t **, pt_entry_t **); 162 163int pmap_fault(pmap_t, uint64_t, uint64_t); 164 165#define pmap_page_is_mapped(m) (!TAILQ_EMPTY(&(m)->md.pv_list)) 166 167#endif /* _KERNEL */ 168 169#endif /* !LOCORE */ 170 171#endif /* !_MACHINE_PMAP_H_ */ 172