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 * $FreeBSD$ 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)->a.flags & PGA_WRITEABLE) != 0) 57 void pmap_page_set_memattr(vm_page_t m, vm_memattr_t ma); 58 59 /* 60 * Pmap stuff 61 */ 62 63 struct 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 */ 73 struct pv_addr { 74 SLIST_ENTRY(pv_addr) pv_list; 75 vm_offset_t pv_va; 76 vm_paddr_t pv_pa; 77 }; 78 79 enum pmap_stage { 80 PM_INVALID, 81 PM_STAGE1, 82 PM_STAGE2, 83 }; 84 85 struct pmap { 86 struct mtx pm_mtx; 87 struct pmap_statistics pm_stats; /* pmap statistics */ 88 uint64_t pm_ttbr; 89 vm_paddr_t pm_l0_paddr; 90 pd_entry_t *pm_l0; 91 TAILQ_HEAD(,pv_chunk) pm_pvchunk; /* list of mappings in pmap */ 92 struct vm_radix pm_root; /* spare page table pages */ 93 long pm_cookie; /* encodes the pmap's ASID */ 94 struct asid_set *pm_asid_set; /* The ASID/VMID set to use */ 95 enum pmap_stage pm_stage; 96 int pm_levels; 97 }; 98 typedef struct pmap *pmap_t; 99 100 typedef struct pv_entry { 101 vm_offset_t pv_va; /* virtual address for mapping */ 102 TAILQ_ENTRY(pv_entry) pv_next; 103 } *pv_entry_t; 104 105 /* 106 * pv_entries are allocated in chunks per-process. This avoids the 107 * need to track per-pmap assignments. 108 */ 109 #if PAGE_SIZE == PAGE_SIZE_4K 110 #define _NPCM 3 111 #define _NPCPV 168 112 #define _NPAD 0 113 #elif PAGE_SIZE == PAGE_SIZE_16K 114 #define _NPCM 11 115 #define _NPCPV 677 116 #define _NPAD 1 117 #else 118 #error Unsupported page size 119 #endif 120 121 #define PV_CHUNK_HEADER \ 122 pmap_t pc_pmap; \ 123 TAILQ_ENTRY(pv_chunk) pc_list; \ 124 uint64_t pc_map[_NPCM]; /* bitmap; 1 = free */ \ 125 TAILQ_ENTRY(pv_chunk) pc_lru; 126 127 struct pv_chunk_header { 128 PV_CHUNK_HEADER 129 }; 130 131 struct pv_chunk { 132 PV_CHUNK_HEADER 133 struct pv_entry pc_pventry[_NPCPV]; 134 uint64_t pc_pad[_NPAD]; 135 }; 136 137 struct thread; 138 139 #ifdef _KERNEL 140 extern struct pmap kernel_pmap_store; 141 #define kernel_pmap (&kernel_pmap_store) 142 #define pmap_kernel() kernel_pmap 143 144 #define PMAP_ASSERT_LOCKED(pmap) \ 145 mtx_assert(&(pmap)->pm_mtx, MA_OWNED) 146 #define PMAP_LOCK(pmap) mtx_lock(&(pmap)->pm_mtx) 147 #define PMAP_LOCK_ASSERT(pmap, type) \ 148 mtx_assert(&(pmap)->pm_mtx, (type)) 149 #define PMAP_LOCK_DESTROY(pmap) mtx_destroy(&(pmap)->pm_mtx) 150 #define PMAP_LOCK_INIT(pmap) mtx_init(&(pmap)->pm_mtx, "pmap", \ 151 NULL, MTX_DEF | MTX_DUPOK) 152 #define PMAP_OWNED(pmap) mtx_owned(&(pmap)->pm_mtx) 153 #define PMAP_MTX(pmap) (&(pmap)->pm_mtx) 154 #define PMAP_TRYLOCK(pmap) mtx_trylock(&(pmap)->pm_mtx) 155 #define PMAP_UNLOCK(pmap) mtx_unlock(&(pmap)->pm_mtx) 156 157 #define ASID_RESERVED_FOR_PID_0 0 158 #define ASID_RESERVED_FOR_EFI 1 159 #define ASID_FIRST_AVAILABLE (ASID_RESERVED_FOR_EFI + 1) 160 #define ASID_TO_OPERAND(asid) ({ \ 161 KASSERT((asid) != -1, ("invalid ASID")); \ 162 (uint64_t)(asid) << TTBR_ASID_SHIFT; \ 163 }) 164 165 extern vm_offset_t virtual_avail; 166 extern vm_offset_t virtual_end; 167 168 /* 169 * Macros to test if a mapping is mappable with an L1 Section mapping 170 * or an L2 Large Page mapping. 171 */ 172 #define L1_MAPPABLE_P(va, pa, size) \ 173 ((((va) | (pa)) & L1_OFFSET) == 0 && (size) >= L1_SIZE) 174 175 #define pmap_vm_page_alloc_check(m) 176 177 void pmap_activate_vm(pmap_t); 178 void pmap_bootstrap(vm_offset_t, vm_offset_t, vm_paddr_t, vm_size_t); 179 int pmap_change_attr(vm_offset_t va, vm_size_t size, int mode); 180 int pmap_change_prot(vm_offset_t va, vm_size_t size, vm_prot_t prot); 181 void pmap_kenter(vm_offset_t sva, vm_size_t size, vm_paddr_t pa, int mode); 182 void pmap_kenter_device(vm_offset_t, vm_size_t, vm_paddr_t); 183 bool pmap_klookup(vm_offset_t va, vm_paddr_t *pa); 184 vm_paddr_t pmap_kextract(vm_offset_t va); 185 void pmap_kremove(vm_offset_t); 186 void pmap_kremove_device(vm_offset_t, vm_size_t); 187 void *pmap_mapdev_attr(vm_paddr_t pa, vm_size_t size, vm_memattr_t ma); 188 bool pmap_page_is_mapped(vm_page_t m); 189 int pmap_pinit_stage(pmap_t, enum pmap_stage, int); 190 bool pmap_ps_enabled(pmap_t pmap); 191 uint64_t pmap_to_ttbr0(pmap_t pmap); 192 193 void *pmap_mapdev(vm_paddr_t, vm_size_t); 194 void *pmap_mapbios(vm_paddr_t, vm_size_t); 195 void pmap_unmapdev(vm_offset_t, vm_size_t); 196 void pmap_unmapbios(vm_offset_t, vm_size_t); 197 198 boolean_t pmap_map_io_transient(vm_page_t *, vm_offset_t *, int, boolean_t); 199 void pmap_unmap_io_transient(vm_page_t *, vm_offset_t *, int, boolean_t); 200 201 bool pmap_get_tables(pmap_t, vm_offset_t, pd_entry_t **, pd_entry_t **, 202 pd_entry_t **, pt_entry_t **); 203 204 int pmap_fault(pmap_t, uint64_t, uint64_t); 205 206 struct pcb *pmap_switch(struct thread *); 207 208 extern void (*pmap_clean_stage2_tlbi)(void); 209 extern void (*pmap_invalidate_vpipt_icache)(void); 210 211 static inline int 212 pmap_vmspace_copy(pmap_t dst_pmap __unused, pmap_t src_pmap __unused) 213 { 214 215 return (0); 216 } 217 218 #endif /* _KERNEL */ 219 220 #endif /* !LOCORE */ 221 222 #endif /* !_MACHINE_PMAP_H_ */ 223