pmap.h revision 1.32
1 /* $NetBSD: pmap.h,v 1.32 2020/02/03 13:35:44 ryo 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/pte.h> 48 49 #define PMAP_NEED_PROCWR 50 #define PMAP_GROWKERNEL 51 #define PMAP_STEAL_MEMORY 52 53 #define __HAVE_VM_PAGE_MD 54 55 #ifndef KASAN 56 #define PMAP_MAP_POOLPAGE(pa) AARCH64_PA_TO_KVA(pa) 57 #define PMAP_UNMAP_POOLPAGE(va) AARCH64_KVA_TO_PA(va) 58 59 #define PMAP_DIRECT 60 static __inline int 61 pmap_direct_process(paddr_t pa, voff_t pgoff, size_t len, 62 int (*process)(void *, size_t, void *), void *arg) 63 { 64 vaddr_t va = AARCH64_PA_TO_KVA(pa); 65 66 return process((void *)(va + pgoff), len, arg); 67 } 68 #endif 69 70 struct pmap { 71 kmutex_t pm_lock; 72 struct pool *pm_pvpool; 73 pd_entry_t *pm_l0table; /* L0 table: 512G*512 */ 74 paddr_t pm_l0table_pa; 75 76 TAILQ_HEAD(, vm_page) pm_vmlist; /* for L[0123] tables */ 77 78 struct pmap_statistics pm_stats; 79 unsigned int pm_refcnt; 80 unsigned int pm_idlepdp; 81 int pm_asid; 82 bool pm_activated; 83 }; 84 85 struct pv_entry; 86 87 struct pmap_page { 88 kmutex_t pp_pvlock; 89 TAILQ_HEAD(, pv_entry) pp_pvhead; 90 91 /* VM_PROT_READ means referenced, VM_PROT_WRITE means modified */ 92 uint32_t pp_flags; 93 }; 94 95 struct vm_page_md { 96 TAILQ_ENTRY(vm_page) mdpg_vmlist; /* L[0123] table vm_page list */ 97 pd_entry_t *mdpg_ptep_parent; /* for page descriptor page only */ 98 99 struct pmap_page mdpg_pp; 100 }; 101 102 /* each mdpg_pp.pp_pvlock will be initialized in pmap_init() */ 103 #define VM_MDPAGE_INIT(pg) \ 104 do { \ 105 TAILQ_INIT(&(pg)->mdpage.mdpg_pp.pp_pvhead); \ 106 (pg)->mdpage.mdpg_pp.pp_flags = 0; \ 107 } while (/*CONSTCOND*/ 0) 108 109 110 /* saved permission bit for referenced/modified emulation */ 111 #define LX_BLKPAG_OS_READ LX_BLKPAG_OS_0 112 #define LX_BLKPAG_OS_WRITE LX_BLKPAG_OS_1 113 #define LX_BLKPAG_OS_WIRED LX_BLKPAG_OS_2 114 #define LX_BLKPAG_OS_BOOT LX_BLKPAG_OS_3 115 #define LX_BLKPAG_OS_RWMASK (LX_BLKPAG_OS_WRITE|LX_BLKPAG_OS_READ) 116 117 /* memory attributes are configured MAIR_EL1 in locore */ 118 #define LX_BLKPAG_ATTR_NORMAL_WB __SHIFTIN(0, LX_BLKPAG_ATTR_INDX) 119 #define LX_BLKPAG_ATTR_NORMAL_NC __SHIFTIN(1, LX_BLKPAG_ATTR_INDX) 120 #define LX_BLKPAG_ATTR_NORMAL_WT __SHIFTIN(2, LX_BLKPAG_ATTR_INDX) 121 #define LX_BLKPAG_ATTR_DEVICE_MEM __SHIFTIN(3, LX_BLKPAG_ATTR_INDX) 122 #define LX_BLKPAG_ATTR_DEVICE_MEM_SO __SHIFTIN(4, LX_BLKPAG_ATTR_INDX) 123 #define LX_BLKPAG_ATTR_MASK LX_BLKPAG_ATTR_INDX 124 125 #define lxpde_pa(pde) ((paddr_t)((pde) & LX_TBL_PA)) 126 #define lxpde_valid(pde) (((pde) & LX_VALID) == LX_VALID) 127 #define l0pde_pa(pde) lxpde_pa(pde) 128 #define l0pde_index(v) (((vaddr_t)(v) & L0_ADDR_BITS) >> L0_SHIFT) 129 #define l0pde_valid(pde) lxpde_valid(pde) 130 /* l0pte always contains table entries */ 131 132 #define l1pde_pa(pde) lxpde_pa(pde) 133 #define l1pde_index(v) (((vaddr_t)(v) & L1_ADDR_BITS) >> L1_SHIFT) 134 #define l1pde_valid(pde) lxpde_valid(pde) 135 #define l1pde_is_block(pde) (((pde) & LX_TYPE) == LX_TYPE_BLK) 136 #define l1pde_is_table(pde) (((pde) & LX_TYPE) == LX_TYPE_TBL) 137 138 #define l2pde_pa(pde) lxpde_pa(pde) 139 #define l2pde_index(v) (((vaddr_t)(v) & L2_ADDR_BITS) >> L2_SHIFT) 140 #define l2pde_valid(pde) lxpde_valid(pde) 141 #define l2pde_is_block(pde) (((pde) & LX_TYPE) == LX_TYPE_BLK) 142 #define l2pde_is_table(pde) (((pde) & LX_TYPE) == LX_TYPE_TBL) 143 144 #define l3pte_pa(pde) lxpde_pa(pde) 145 #define l3pte_executable(pde,user) \ 146 (((pde) & ((user) ? LX_BLKPAG_UXN : LX_BLKPAG_PXN)) == 0) 147 #define l3pte_readable(pde) ((pde) & LX_BLKPAG_AF) 148 #define l3pte_writable(pde) \ 149 (((pde) & (LX_BLKPAG_AF|LX_BLKPAG_AP)) == (LX_BLKPAG_AF|LX_BLKPAG_AP_RW)) 150 #define l3pte_index(v) (((vaddr_t)(v) & L3_ADDR_BITS) >> L3_SHIFT) 151 #define l3pte_valid(pde) lxpde_valid(pde) 152 #define l3pte_is_page(pde) (((pde) & LX_TYPE) == L3_TYPE_PAG) 153 /* l3pte contains always page entries */ 154 155 void pmap_bootstrap(vaddr_t, vaddr_t); 156 bool pmap_fault_fixup(struct pmap *, vaddr_t, vm_prot_t, bool user); 157 158 /* for ddb */ 159 void pmap_db_pteinfo(vaddr_t, void (*)(const char *, ...) __printflike(1, 2)); 160 void pmap_db_ttbrdump(bool, vaddr_t, void (*)(const char *, ...) 161 __printflike(1, 2)); 162 pt_entry_t *kvtopte(vaddr_t); 163 pt_entry_t pmap_kvattr(vaddr_t, vm_prot_t); 164 165 /* locore.S */ 166 pd_entry_t *bootpage_alloc(void); 167 168 /* pmap_locore.c */ 169 int pmapboot_enter(vaddr_t, paddr_t, psize_t, psize_t, 170 pt_entry_t, uint64_t, pd_entry_t *(*)(void), 171 void (*pr)(const char *, ...) __printflike(1, 2)); 172 #define PMAPBOOT_ENTER_NOBLOCK 0x00000001 173 #define PMAPBOOT_ENTER_NOOVERWRITE 0x00000002 174 int pmapboot_protect(vaddr_t, vaddr_t, vm_prot_t); 175 void pmap_db_pte_print(pt_entry_t, int, 176 void (*pr)(const char *, ...) __printflike(1, 2)); 177 178 /* Hooks for the pool allocator */ 179 paddr_t vtophys(vaddr_t); 180 #define VTOPHYS_FAILED ((paddr_t)-1L) /* POOL_PADDR_INVALID */ 181 #define POOL_VTOPHYS(va) vtophys((vaddr_t) (va)) 182 183 184 /* devmap */ 185 struct pmap_devmap { 186 vaddr_t pd_va; /* virtual address */ 187 paddr_t pd_pa; /* physical address */ 188 psize_t pd_size; /* size of region */ 189 vm_prot_t pd_prot; /* protection code */ 190 u_int pd_flags; /* flags for pmap_kenter_pa() */ 191 }; 192 193 void pmap_devmap_register(const struct pmap_devmap *); 194 void pmap_devmap_bootstrap(vaddr_t, const struct pmap_devmap *); 195 const struct pmap_devmap *pmap_devmap_find_pa(paddr_t, psize_t); 196 const struct pmap_devmap *pmap_devmap_find_va(vaddr_t, vsize_t); 197 vaddr_t pmap_devmap_phystov(paddr_t); 198 paddr_t pmap_devmap_vtophys(paddr_t); 199 200 paddr_t pmap_alloc_pdp(struct pmap *, struct vm_page **, int, bool); 201 202 #define L1_TRUNC_BLOCK(x) ((x) & L1_FRAME) 203 #define L1_ROUND_BLOCK(x) L1_TRUNC_BLOCK((x) + L1_SIZE - 1) 204 #define L2_TRUNC_BLOCK(x) ((x) & L2_FRAME) 205 #define L2_ROUND_BLOCK(x) L2_TRUNC_BLOCK((x) + L2_SIZE - 1) 206 #define L3_TRUNC_BLOCK(x) ((x) & L3_FRAME) 207 #define L3_ROUND_BLOCK(x) L3_TRUNC_BLOCK((x) + L3_SIZE - 1) 208 209 #define DEVMAP_ALIGN(x) L3_TRUNC_BLOCK((x)) 210 #define DEVMAP_SIZE(x) L3_ROUND_BLOCK((x)) 211 212 #define DEVMAP_ENTRY(va, pa, sz) \ 213 { \ 214 .pd_va = DEVMAP_ALIGN(va), \ 215 .pd_pa = DEVMAP_ALIGN(pa), \ 216 .pd_size = DEVMAP_SIZE(sz), \ 217 .pd_prot = VM_PROT_READ|VM_PROT_WRITE, \ 218 .pd_flags = PMAP_DEV \ 219 } 220 #define DEVMAP_ENTRY_END { 0 } 221 222 /* mmap cookie and flags */ 223 #define AARCH64_MMAP_FLAG_SHIFT (64 - PGSHIFT) 224 #define AARCH64_MMAP_FLAG_MASK 0xf 225 #define AARCH64_MMAP_WRITEBACK 0UL 226 #define AARCH64_MMAP_NOCACHE 1UL 227 #define AARCH64_MMAP_WRITECOMBINE 2UL 228 #define AARCH64_MMAP_DEVICE 3UL 229 230 #define ARM_MMAP_MASK __BITS(63, AARCH64_MMAP_FLAG_SHIFT) 231 #define ARM_MMAP_WRITECOMBINE __SHIFTIN(AARCH64_MMAP_WRITECOMBINE, ARM_MMAP_MASK) 232 #define ARM_MMAP_WRITEBACK __SHIFTIN(AARCH64_MMAP_WRITEBACK, ARM_MMAP_MASK) 233 #define ARM_MMAP_NOCACHE __SHIFTIN(AARCH64_MMAP_NOCACHE, ARM_MMAP_MASK) 234 #define ARM_MMAP_DEVICE __SHIFTIN(AARCH64_MMAP_DEVICE, ARM_MMAP_MASK) 235 236 #define PMAP_PTE 0x10000000 /* kenter_pa */ 237 #define PMAP_DEV 0x20000000 /* kenter_pa */ 238 #define PMAP_DEV_SO 0x40000000 /* kenter_pa */ 239 #define PMAP_DEV_MASK (PMAP_DEV | PMAP_DEV_SO) 240 241 static inline u_int 242 aarch64_mmap_flags(paddr_t mdpgno) 243 { 244 u_int nflag, pflag; 245 246 /* 247 * aarch64 arch has 5 memory attribute: 248 * 249 * WriteBack - write back cache 250 * WriteThru - write through cache 251 * NoCache - no cache 252 * Device(nGnRE) - no Gathering, no Reordering, Early write ack 253 * Device(nGnRnE) - no Gathering, no Reordering, no Early write ack 254 * 255 * but pmap has PMAP_{NOCACHE,WRITE_COMBINE,WRITE_BACK} flags. 256 */ 257 258 nflag = (mdpgno >> AARCH64_MMAP_FLAG_SHIFT) & AARCH64_MMAP_FLAG_MASK; 259 switch (nflag) { 260 case AARCH64_MMAP_DEVICE: 261 pflag = PMAP_DEV; 262 break; 263 case AARCH64_MMAP_WRITECOMBINE: 264 pflag = PMAP_WRITE_COMBINE; 265 break; 266 case AARCH64_MMAP_WRITEBACK: 267 pflag = PMAP_WRITE_BACK; 268 break; 269 case AARCH64_MMAP_NOCACHE: 270 default: 271 pflag = PMAP_NOCACHE; 272 break; 273 } 274 return pflag; 275 } 276 277 278 #define pmap_phys_address(pa) aarch64_ptob((pa)) 279 #define pmap_mmap_flags(ppn) aarch64_mmap_flags((ppn)) 280 281 #define pmap_update(pmap) ((void)0) 282 #define pmap_copy(dp,sp,d,l,s) ((void)0) 283 #define pmap_wired_count(pmap) ((pmap)->pm_stats.wired_count) 284 #define pmap_resident_count(pmap) ((pmap)->pm_stats.resident_count) 285 286 void pmap_procwr(struct proc *, vaddr_t, int); 287 bool pmap_extract_coherency(pmap_t, vaddr_t, paddr_t *, bool *); 288 void pmap_icache_sync_range(pmap_t, vaddr_t, vaddr_t); 289 290 #define PMAP_MAPSIZE1 L2_SIZE 291 292 #endif /* _KERNEL */ 293 294 #elif defined(__arm__) 295 296 #include <arm/pmap.h> 297 298 #endif /* __arm__/__aarch64__ */ 299 300 #endif /* !_AARCH64_PMAP_ */ 301
Indexes created Thu Oct 02 01:09:59 GMT 2025