pmap.h revision 1.40
1 /* $NetBSD: pmap.h,v 1.40 2020/06/14 21:47:15 ad Exp $ */ 2 3 /*- 4 * Copyright (c) 2014 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Matt Thomas of 3am Software Foundry. 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #ifndef _AARCH64_PMAP_H_ 33 #define _AARCH64_PMAP_H_ 34 35 #ifdef __aarch64__ 36 37 #ifdef _KERNEL 38 #ifdef _KERNEL_OPT 39 #include "opt_kasan.h" 40 #endif 41 42 #include <sys/types.h> 43 #include <sys/pool.h> 44 #include <sys/queue.h> 45 #include <uvm/uvm_pglist.h> 46 47 #include <aarch64/armreg.h> 48 #include <aarch64/pte.h> 49 50 #define PMAP_NEED_PROCWR 51 #define PMAP_GROWKERNEL 52 #define PMAP_STEAL_MEMORY 53 54 #define __HAVE_VM_PAGE_MD 55 #define __HAVE_PMAP_PV_TRACK 1 56 57 #ifndef KASAN 58 #define PMAP_MAP_POOLPAGE(pa) AARCH64_PA_TO_KVA(pa) 59 #define PMAP_UNMAP_POOLPAGE(va) AARCH64_KVA_TO_PA(va) 60 61 #define PMAP_DIRECT 62 static __inline int 63 pmap_direct_process(paddr_t pa, voff_t pgoff, size_t len, 64 int (*process)(void *, size_t, void *), void *arg) 65 { 66 vaddr_t va = AARCH64_PA_TO_KVA(pa); 67 68 return process((void *)(va + pgoff), len, arg); 69 } 70 #endif 71 72 struct pmap { 73 kmutex_t pm_lock; 74 struct pool *pm_pvpool; 75 pd_entry_t *pm_l0table; /* L0 table: 512G*512 */ 76 paddr_t pm_l0table_pa; 77 78 LIST_HEAD(, vm_page) pm_vmlist; /* for L[0123] tables */ 79 80 struct pmap_statistics pm_stats; 81 unsigned int pm_refcnt; 82 unsigned int pm_idlepdp; 83 int pm_asid; 84 bool pm_activated; 85 }; 86 87 /* sized to reduce memory consumption & cache misses (32 bytes) */ 88 struct pv_entry { 89 struct pv_entry *pv_next; 90 struct pmap *pv_pmap; 91 vaddr_t pv_va; /* for embedded entry (pp_pv) also includes flags */ 92 void *pv_ptep; /* pointer for fast pte lookup */ 93 }; 94 95 struct pmap_page { 96 kmutex_t pp_pvlock; 97 struct pv_entry pp_pv; 98 }; 99 100 /* try to keep vm_page at or under 128 bytes to reduce cache misses */ 101 struct vm_page_md { 102 struct pmap_page mdpg_pp; 103 }; 104 /* for page descriptor page only */ 105 #define mdpg_ptep_parent mdpg_pp.pp_pv.pv_ptep 106 107 #define VM_MDPAGE_INIT(pg) \ 108 do { \ 109 PMAP_PAGE_INIT(&(pg)->mdpage.mdpg_pp); \ 110 } while (/*CONSTCOND*/ 0) 111 112 #define PMAP_PAGE_INIT(pp) \ 113 do { \ 114 mutex_init(&(pp)->pp_pvlock, MUTEX_NODEBUG, IPL_VM); \ 115 (pp)->pp_pv.pv_next = NULL; \ 116 (pp)->pp_pv.pv_pmap = NULL; \ 117 (pp)->pp_pv.pv_va = 0; \ 118 (pp)->pp_pv.pv_ptep = NULL; \ 119 } while (/*CONSTCOND*/ 0) 120 121 /* saved permission bit for referenced/modified emulation */ 122 #define LX_BLKPAG_OS_READ LX_BLKPAG_OS_0 123 #define LX_BLKPAG_OS_WRITE LX_BLKPAG_OS_1 124 #define LX_BLKPAG_OS_WIRED LX_BLKPAG_OS_2 125 #define LX_BLKPAG_OS_BOOT LX_BLKPAG_OS_3 126 #define LX_BLKPAG_OS_RWMASK (LX_BLKPAG_OS_WRITE|LX_BLKPAG_OS_READ) 127 128 /* memory attributes are configured MAIR_EL1 in locore */ 129 #define LX_BLKPAG_ATTR_NORMAL_WB __SHIFTIN(0, LX_BLKPAG_ATTR_INDX) 130 #define LX_BLKPAG_ATTR_NORMAL_NC __SHIFTIN(1, LX_BLKPAG_ATTR_INDX) 131 #define LX_BLKPAG_ATTR_NORMAL_WT __SHIFTIN(2, LX_BLKPAG_ATTR_INDX) 132 #define LX_BLKPAG_ATTR_DEVICE_MEM __SHIFTIN(3, LX_BLKPAG_ATTR_INDX) 133 #define LX_BLKPAG_ATTR_DEVICE_MEM_SO __SHIFTIN(4, LX_BLKPAG_ATTR_INDX) 134 #define LX_BLKPAG_ATTR_MASK LX_BLKPAG_ATTR_INDX 135 136 #define lxpde_pa(pde) ((paddr_t)((pde) & LX_TBL_PA)) 137 #define lxpde_valid(pde) (((pde) & LX_VALID) == LX_VALID) 138 #define l0pde_pa(pde) lxpde_pa(pde) 139 #define l0pde_index(v) (((vaddr_t)(v) & L0_ADDR_BITS) >> L0_SHIFT) 140 #define l0pde_valid(pde) lxpde_valid(pde) 141 /* l0pte always contains table entries */ 142 143 #define l1pde_pa(pde) lxpde_pa(pde) 144 #define l1pde_index(v) (((vaddr_t)(v) & L1_ADDR_BITS) >> L1_SHIFT) 145 #define l1pde_valid(pde) lxpde_valid(pde) 146 #define l1pde_is_block(pde) (((pde) & LX_TYPE) == LX_TYPE_BLK) 147 #define l1pde_is_table(pde) (((pde) & LX_TYPE) == LX_TYPE_TBL) 148 149 #define l2pde_pa(pde) lxpde_pa(pde) 150 #define l2pde_index(v) (((vaddr_t)(v) & L2_ADDR_BITS) >> L2_SHIFT) 151 #define l2pde_valid(pde) lxpde_valid(pde) 152 #define l2pde_is_block(pde) (((pde) & LX_TYPE) == LX_TYPE_BLK) 153 #define l2pde_is_table(pde) (((pde) & LX_TYPE) == LX_TYPE_TBL) 154 155 #define l3pte_pa(pde) lxpde_pa(pde) 156 #define l3pte_executable(pde,user) \ 157 (((pde) & ((user) ? LX_BLKPAG_UXN : LX_BLKPAG_PXN)) == 0) 158 #define l3pte_readable(pde) ((pde) & LX_BLKPAG_AF) 159 #define l3pte_writable(pde) \ 160 (((pde) & (LX_BLKPAG_AF|LX_BLKPAG_AP)) == (LX_BLKPAG_AF|LX_BLKPAG_AP_RW)) 161 #define l3pte_index(v) (((vaddr_t)(v) & L3_ADDR_BITS) >> L3_SHIFT) 162 #define l3pte_valid(pde) lxpde_valid(pde) 163 #define l3pte_is_page(pde) (((pde) & LX_TYPE) == L3_TYPE_PAG) 164 /* l3pte contains always page entries */ 165 166 void pmap_bootstrap(vaddr_t, vaddr_t); 167 bool pmap_fault_fixup(struct pmap *, vaddr_t, vm_prot_t, bool user); 168 169 /* for ddb */ 170 void pmap_db_pteinfo(vaddr_t, void (*)(const char *, ...) __printflike(1, 2)); 171 void pmap_db_ttbrdump(bool, vaddr_t, void (*)(const char *, ...) 172 __printflike(1, 2)); 173 pt_entry_t *kvtopte(vaddr_t); 174 pt_entry_t pmap_kvattr(vaddr_t, vm_prot_t); 175 176 /* locore.S */ 177 pd_entry_t *bootpage_alloc(void); 178 179 /* pmap_locore.c */ 180 int pmapboot_enter(vaddr_t, paddr_t, psize_t, psize_t, 181 pt_entry_t, uint64_t, pd_entry_t *(*)(void), 182 void (*pr)(const char *, ...) __printflike(1, 2)); 183 #define PMAPBOOT_ENTER_NOBLOCK 0x00000001 184 #define PMAPBOOT_ENTER_NOOVERWRITE 0x00000002 185 int pmapboot_enter_range(vaddr_t, paddr_t, psize_t, pt_entry_t, uint64_t, 186 pd_entry_t *(*)(void), void (*)(const char *, ...) __printflike(1, 2)); 187 int pmapboot_protect(vaddr_t, vaddr_t, vm_prot_t); 188 void pmap_db_pte_print(pt_entry_t, int, 189 void (*pr)(const char *, ...) __printflike(1, 2)); 190 191 /* Hooks for the pool allocator */ 192 paddr_t vtophys(vaddr_t); 193 #define VTOPHYS_FAILED ((paddr_t)-1L) /* POOL_PADDR_INVALID */ 194 #define POOL_VTOPHYS(va) vtophys((vaddr_t) (va)) 195 196 197 /* devmap */ 198 struct pmap_devmap { 199 vaddr_t pd_va; /* virtual address */ 200 paddr_t pd_pa; /* physical address */ 201 psize_t pd_size; /* size of region */ 202 vm_prot_t pd_prot; /* protection code */ 203 u_int pd_flags; /* flags for pmap_kenter_pa() */ 204 }; 205 206 void pmap_devmap_register(const struct pmap_devmap *); 207 void pmap_devmap_bootstrap(vaddr_t, const struct pmap_devmap *); 208 const struct pmap_devmap *pmap_devmap_find_pa(paddr_t, psize_t); 209 const struct pmap_devmap *pmap_devmap_find_va(vaddr_t, vsize_t); 210 vaddr_t pmap_devmap_phystov(paddr_t); 211 paddr_t pmap_devmap_vtophys(paddr_t); 212 213 paddr_t pmap_alloc_pdp(struct pmap *, struct vm_page **, int, bool); 214 215 #define L1_TRUNC_BLOCK(x) ((x) & L1_FRAME) 216 #define L1_ROUND_BLOCK(x) L1_TRUNC_BLOCK((x) + L1_SIZE - 1) 217 #define L2_TRUNC_BLOCK(x) ((x) & L2_FRAME) 218 #define L2_ROUND_BLOCK(x) L2_TRUNC_BLOCK((x) + L2_SIZE - 1) 219 #define L3_TRUNC_BLOCK(x) ((x) & L3_FRAME) 220 #define L3_ROUND_BLOCK(x) L3_TRUNC_BLOCK((x) + L3_SIZE - 1) 221 222 #define DEVMAP_ALIGN(x) L3_TRUNC_BLOCK((x)) 223 #define DEVMAP_SIZE(x) L3_ROUND_BLOCK((x)) 224 225 #define DEVMAP_ENTRY(va, pa, sz) \ 226 { \ 227 .pd_va = DEVMAP_ALIGN(va), \ 228 .pd_pa = DEVMAP_ALIGN(pa), \ 229 .pd_size = DEVMAP_SIZE(sz), \ 230 .pd_prot = VM_PROT_READ|VM_PROT_WRITE, \ 231 .pd_flags = PMAP_DEV \ 232 } 233 #define DEVMAP_ENTRY_END { 0 } 234 235 /* mmap cookie and flags */ 236 #define AARCH64_MMAP_FLAG_SHIFT (64 - PGSHIFT) 237 #define AARCH64_MMAP_FLAG_MASK 0xf 238 #define AARCH64_MMAP_WRITEBACK 0UL 239 #define AARCH64_MMAP_NOCACHE 1UL 240 #define AARCH64_MMAP_WRITECOMBINE 2UL 241 #define AARCH64_MMAP_DEVICE 3UL 242 243 #define ARM_MMAP_MASK __BITS(63, AARCH64_MMAP_FLAG_SHIFT) 244 #define ARM_MMAP_WRITECOMBINE __SHIFTIN(AARCH64_MMAP_WRITECOMBINE, ARM_MMAP_MASK) 245 #define ARM_MMAP_WRITEBACK __SHIFTIN(AARCH64_MMAP_WRITEBACK, ARM_MMAP_MASK) 246 #define ARM_MMAP_NOCACHE __SHIFTIN(AARCH64_MMAP_NOCACHE, ARM_MMAP_MASK) 247 #define ARM_MMAP_DEVICE __SHIFTIN(AARCH64_MMAP_DEVICE, ARM_MMAP_MASK) 248 249 #define PMAP_PTE 0x10000000 /* kenter_pa */ 250 #define PMAP_DEV 0x20000000 /* kenter_pa */ 251 #define PMAP_DEV_SO 0x40000000 /* kenter_pa */ 252 #define PMAP_DEV_MASK (PMAP_DEV | PMAP_DEV_SO) 253 254 static inline u_int 255 aarch64_mmap_flags(paddr_t mdpgno) 256 { 257 u_int nflag, pflag; 258 259 /* 260 * aarch64 arch has 5 memory attribute: 261 * 262 * WriteBack - write back cache 263 * WriteThru - write through cache 264 * NoCache - no cache 265 * Device(nGnRE) - no Gathering, no Reordering, Early write ack 266 * Device(nGnRnE) - no Gathering, no Reordering, no Early write ack 267 * 268 * but pmap has PMAP_{NOCACHE,WRITE_COMBINE,WRITE_BACK} flags. 269 */ 270 271 nflag = (mdpgno >> AARCH64_MMAP_FLAG_SHIFT) & AARCH64_MMAP_FLAG_MASK; 272 switch (nflag) { 273 case AARCH64_MMAP_DEVICE: 274 pflag = PMAP_DEV; 275 break; 276 case AARCH64_MMAP_WRITECOMBINE: 277 pflag = PMAP_WRITE_COMBINE; 278 break; 279 case AARCH64_MMAP_WRITEBACK: 280 pflag = PMAP_WRITE_BACK; 281 break; 282 case AARCH64_MMAP_NOCACHE: 283 default: 284 pflag = PMAP_NOCACHE; 285 break; 286 } 287 return pflag; 288 } 289 290 #define pmap_phys_address(pa) aarch64_ptob((pa)) 291 #define pmap_mmap_flags(ppn) aarch64_mmap_flags((ppn)) 292 293 #define pmap_update(pmap) ((void)0) 294 #define pmap_copy(dp,sp,d,l,s) ((void)0) 295 #define pmap_wired_count(pmap) ((pmap)->pm_stats.wired_count) 296 #define pmap_resident_count(pmap) ((pmap)->pm_stats.resident_count) 297 298 void pmap_procwr(struct proc *, vaddr_t, int); 299 bool pmap_extract_coherency(pmap_t, vaddr_t, paddr_t *, bool *); 300 void pmap_icache_sync_range(pmap_t, vaddr_t, vaddr_t); 301 302 void pmap_pv_init(void); 303 void pmap_pv_track(paddr_t, psize_t); 304 void pmap_pv_untrack(paddr_t, psize_t); 305 void pmap_pv_protect(paddr_t, vm_prot_t); 306 307 #define PMAP_MAPSIZE1 L2_SIZE 308 309 #endif /* _KERNEL */ 310 311 #elif defined(__arm__) 312 313 #include <arm/pmap.h> 314 315 #endif /* __arm__/__aarch64__ */ 316 317 #endif /* !_AARCH64_PMAP_ */ 318
Indexes created Thu Oct 02 01:09:59 GMT 2025