| 1 | /* $NetBSD: pmap.h,v 1.61 2016/11/08 03:05:36 christos Exp $ */ |
| 2 | |
| 3 | /* |
| 4 | * Copyright (c) 1997 Charles D. Cranor and Washington University. |
| 5 | * All rights reserved. |
| 6 | * |
| 7 | * Redistribution and use in source and binary forms, with or without |
| 8 | * modification, are permitted provided that the following conditions |
| 9 | * are met: |
| 10 | * 1. Redistributions of source code must retain the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer. |
| 12 | * 2. Redistributions in binary form must reproduce the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer in the |
| 14 | * documentation and/or other materials provided with the distribution. |
| 15 | * |
| 16 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| 17 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 18 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 19 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 20 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 21 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 22 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 23 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 24 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 25 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 26 | */ |
| 27 | |
| 28 | /* |
| 29 | * Copyright (c) 2001 Wasabi Systems, Inc. |
| 30 | * All rights reserved. |
| 31 | * |
| 32 | * Written by Frank van der Linden for Wasabi Systems, Inc. |
| 33 | * |
| 34 | * Redistribution and use in source and binary forms, with or without |
| 35 | * modification, are permitted provided that the following conditions |
| 36 | * are met: |
| 37 | * 1. Redistributions of source code must retain the above copyright |
| 38 | * notice, this list of conditions and the following disclaimer. |
| 39 | * 2. Redistributions in binary form must reproduce the above copyright |
| 40 | * notice, this list of conditions and the following disclaimer in the |
| 41 | * documentation and/or other materials provided with the distribution. |
| 42 | * 3. All advertising materials mentioning features or use of this software |
| 43 | * must display the following acknowledgement: |
| 44 | * This product includes software developed for the NetBSD Project by |
| 45 | * Wasabi Systems, Inc. |
| 46 | * 4. The name of Wasabi Systems, Inc. may not be used to endorse |
| 47 | * or promote products derived from this software without specific prior |
| 48 | * written permission. |
| 49 | * |
| 50 | * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND |
| 51 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
| 52 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 53 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC |
| 54 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 55 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 56 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 57 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 58 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 59 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 60 | * POSSIBILITY OF SUCH DAMAGE. |
| 61 | */ |
| 62 | |
| 63 | /* |
| 64 | * pmap.h: see pmap.c for the history of this pmap module. |
| 65 | */ |
| 66 | |
| 67 | #ifndef _X86_PMAP_H_ |
| 68 | #define _X86_PMAP_H_ |
| 69 | |
| 70 | /* |
| 71 | * pl*_pi: index in the ptp page for a pde mapping a VA. |
| 72 | * (pl*_i below is the index in the virtual array of all pdes per level) |
| 73 | */ |
| 74 | #define pl1_pi(VA) (((VA_SIGN_POS(VA)) & L1_MASK) >> L1_SHIFT) |
| 75 | #define pl2_pi(VA) (((VA_SIGN_POS(VA)) & L2_MASK) >> L2_SHIFT) |
| 76 | #define pl3_pi(VA) (((VA_SIGN_POS(VA)) & L3_MASK) >> L3_SHIFT) |
| 77 | #define pl4_pi(VA) (((VA_SIGN_POS(VA)) & L4_MASK) >> L4_SHIFT) |
| 78 | |
| 79 | /* |
| 80 | * pl*_i: generate index into pde/pte arrays in virtual space |
| 81 | * |
| 82 | * pl_i(va, X) == plX_i(va) <= pl_i_roundup(va, X) |
| 83 | */ |
| 84 | #define pl1_i(VA) (((VA_SIGN_POS(VA)) & L1_FRAME) >> L1_SHIFT) |
| 85 | #define pl2_i(VA) (((VA_SIGN_POS(VA)) & L2_FRAME) >> L2_SHIFT) |
| 86 | #define pl3_i(VA) (((VA_SIGN_POS(VA)) & L3_FRAME) >> L3_SHIFT) |
| 87 | #define pl4_i(VA) (((VA_SIGN_POS(VA)) & L4_FRAME) >> L4_SHIFT) |
| 88 | #define pl_i(va, lvl) \ |
| 89 | (((VA_SIGN_POS(va)) & ptp_masks[(lvl)-1]) >> ptp_shifts[(lvl)-1]) |
| 90 | |
| 91 | #define pl_i_roundup(va, lvl) pl_i((va)+ ~ptp_masks[(lvl)-1], (lvl)) |
| 92 | |
| 93 | /* |
| 94 | * PTP macros: |
| 95 | * a PTP's index is the PD index of the PDE that points to it |
| 96 | * a PTP's offset is the byte-offset in the PTE space that this PTP is at |
| 97 | * a PTP's VA is the first VA mapped by that PTP |
| 98 | */ |
| 99 | |
| 100 | #define ptp_va2o(va, lvl) (pl_i(va, (lvl)+1) * PAGE_SIZE) |
| 101 | |
| 102 | /* size of a PDP: usually one page, except for PAE */ |
| 103 | #ifdef PAE |
| 104 | #define PDP_SIZE 4 |
| 105 | #else |
| 106 | #define PDP_SIZE 1 |
| 107 | #endif |
| 108 | |
| 109 | |
| 110 | #if defined(_KERNEL) |
| 111 | #include <sys/kcpuset.h> |
| 112 | #include <uvm/pmap/pmap_pvt.h> |
| 113 | |
| 114 | /* |
| 115 | * pmap data structures: see pmap.c for details of locking. |
| 116 | */ |
| 117 | |
| 118 | /* |
| 119 | * we maintain a list of all non-kernel pmaps |
| 120 | */ |
| 121 | |
| 122 | LIST_HEAD(pmap_head, pmap); /* struct pmap_head: head of a pmap list */ |
| 123 | |
| 124 | /* |
| 125 | * linked list of all non-kernel pmaps |
| 126 | */ |
| 127 | extern struct pmap_head pmaps; |
| 128 | extern kmutex_t pmaps_lock; /* protects pmaps */ |
| 129 | |
| 130 | /* |
| 131 | * pool_cache(9) that PDPs are allocated from |
| 132 | */ |
| 133 | extern struct pool_cache pmap_pdp_cache; |
| 134 | |
| 135 | /* |
| 136 | * the pmap structure |
| 137 | * |
| 138 | * note that the pm_obj contains the lock pointer, the reference count, |
| 139 | * page list, and number of PTPs within the pmap. |
| 140 | * |
| 141 | * pm_lock is the same as the lock for vm object 0. Changes to |
| 142 | * the other objects may only be made if that lock has been taken |
| 143 | * (the other object locks are only used when uvm_pagealloc is called) |
| 144 | */ |
| 145 | |
| 146 | struct pmap { |
| 147 | struct uvm_object pm_obj[PTP_LEVELS-1]; /* objects for lvl >= 1) */ |
| 148 | #define pm_lock pm_obj[0].vmobjlock |
| 149 | kmutex_t pm_obj_lock[PTP_LEVELS-1]; /* locks for pm_objs */ |
| 150 | LIST_ENTRY(pmap) pm_list; /* list (lck by pm_list lock) */ |
| 151 | pd_entry_t *pm_pdir; /* VA of PD (lck by object lock) */ |
| 152 | paddr_t pm_pdirpa[PDP_SIZE]; /* PA of PDs (read-only after create) */ |
| 153 | struct vm_page *pm_ptphint[PTP_LEVELS-1]; |
| 154 | /* pointer to a PTP in our pmap */ |
| 155 | struct pmap_statistics pm_stats; /* pmap stats (lck by object lock) */ |
| 156 | |
| 157 | #if !defined(__x86_64__) |
| 158 | vaddr_t pm_hiexec; /* highest executable mapping */ |
| 159 | #endif /* !defined(__x86_64__) */ |
| 160 | int pm_flags; /* see below */ |
| 161 | |
| 162 | union descriptor *pm_ldt; /* user-set LDT */ |
| 163 | size_t pm_ldt_len; /* size of LDT in bytes */ |
| 164 | int pm_ldt_sel; /* LDT selector */ |
| 165 | kcpuset_t *pm_cpus; /* mask of CPUs using pmap */ |
| 166 | kcpuset_t *pm_kernel_cpus; /* mask of CPUs using kernel part |
| 167 | of pmap */ |
| 168 | kcpuset_t *pm_xen_ptp_cpus; /* mask of CPUs which have this pmap's |
| 169 | ptp mapped */ |
| 170 | uint64_t pm_ncsw; /* for assertions */ |
| 171 | struct vm_page *pm_gc_ptp; /* pages from pmap g/c */ |
| 172 | }; |
| 173 | |
| 174 | /* macro to access pm_pdirpa slots */ |
| 175 | #ifdef PAE |
| 176 | #define pmap_pdirpa(pmap, index) \ |
| 177 | ((pmap)->pm_pdirpa[l2tol3(index)] + l2tol2(index) * sizeof(pd_entry_t)) |
| 178 | #else |
| 179 | #define pmap_pdirpa(pmap, index) \ |
| 180 | ((pmap)->pm_pdirpa[0] + (index) * sizeof(pd_entry_t)) |
| 181 | #endif |
| 182 | |
| 183 | /* |
| 184 | * flag to be used for kernel mappings: PG_u on Xen/amd64, |
| 185 | * 0 otherwise. |
| 186 | */ |
| 187 | #if defined(XEN) && defined(__x86_64__) |
| 188 | #define PG_k PG_u |
| 189 | #else |
| 190 | #define PG_k 0 |
| 191 | #endif |
| 192 | |
| 193 | /* |
| 194 | * MD flags that we use for pmap_enter and pmap_kenter_pa: |
| 195 | */ |
| 196 | |
| 197 | /* |
| 198 | * global kernel variables |
| 199 | */ |
| 200 | |
| 201 | /* |
| 202 | * PDPpaddr is the physical address of the kernel's PDP. |
| 203 | * - i386 non-PAE and amd64: PDPpaddr corresponds directly to the %cr3 |
| 204 | * value associated to the kernel process, proc0. |
| 205 | * - i386 PAE: it still represents the PA of the kernel's PDP (L2). Due to |
| 206 | * the L3 PD, it cannot be considered as the equivalent of a %cr3 any more. |
| 207 | * - Xen: it corresponds to the PFN of the kernel's PDP. |
| 208 | */ |
| 209 | extern u_long PDPpaddr; |
| 210 | |
| 211 | extern pd_entry_t pmap_pg_g; /* do we support PG_G? */ |
| 212 | extern pd_entry_t pmap_pg_nx; /* do we support PG_NX? */ |
| 213 | extern long nkptp[PTP_LEVELS]; |
| 214 | |
| 215 | /* |
| 216 | * macros |
| 217 | */ |
| 218 | |
| 219 | #define pmap_resident_count(pmap) ((pmap)->pm_stats.resident_count) |
| 220 | #define pmap_wired_count(pmap) ((pmap)->pm_stats.wired_count) |
| 221 | |
| 222 | #define pmap_clear_modify(pg) pmap_clear_attrs(pg, PG_M) |
| 223 | #define pmap_clear_reference(pg) pmap_clear_attrs(pg, PG_U) |
| 224 | #define pmap_copy(DP,SP,D,L,S) __USE(L) |
| 225 | #define pmap_is_modified(pg) pmap_test_attrs(pg, PG_M) |
| 226 | #define pmap_is_referenced(pg) pmap_test_attrs(pg, PG_U) |
| 227 | #define pmap_move(DP,SP,D,L,S) |
| 228 | #define pmap_phys_address(ppn) (x86_ptob(ppn) & ~X86_MMAP_FLAG_MASK) |
| 229 | #define pmap_mmap_flags(ppn) x86_mmap_flags(ppn) |
| 230 | #define pmap_valid_entry(E) ((E) & PG_V) /* is PDE or PTE valid? */ |
| 231 | |
| 232 | #if defined(__x86_64__) || defined(PAE) |
| 233 | #define X86_MMAP_FLAG_SHIFT (64 - PGSHIFT) |
| 234 | #else |
| 235 | #define X86_MMAP_FLAG_SHIFT (32 - PGSHIFT) |
| 236 | #endif |
| 237 | |
| 238 | #define X86_MMAP_FLAG_MASK 0xf |
| 239 | #define X86_MMAP_FLAG_PREFETCH 0x1 |
| 240 | |
| 241 | /* |
| 242 | * prototypes |
| 243 | */ |
| 244 | |
| 245 | void pmap_activate(struct lwp *); |
| 246 | void pmap_bootstrap(vaddr_t); |
| 247 | bool pmap_clear_attrs(struct vm_page *, unsigned); |
| 248 | bool pmap_pv_clear_attrs(paddr_t, unsigned); |
| 249 | void pmap_deactivate(struct lwp *); |
| 250 | void pmap_page_remove(struct vm_page *); |
| 251 | void pmap_pv_remove(paddr_t); |
| 252 | void pmap_remove(struct pmap *, vaddr_t, vaddr_t); |
| 253 | bool pmap_test_attrs(struct vm_page *, unsigned); |
| 254 | void pmap_write_protect(struct pmap *, vaddr_t, vaddr_t, vm_prot_t); |
| 255 | void pmap_load(void); |
| 256 | paddr_t pmap_init_tmp_pgtbl(paddr_t); |
| 257 | void pmap_remove_all(struct pmap *); |
| 258 | void pmap_ldt_cleanup(struct lwp *); |
| 259 | void pmap_ldt_sync(struct pmap *); |
| 260 | void pmap_kremove_local(vaddr_t, vsize_t); |
| 261 | |
| 262 | void pmap_emap_enter(vaddr_t, paddr_t, vm_prot_t); |
| 263 | void pmap_emap_remove(vaddr_t, vsize_t); |
| 264 | void pmap_emap_sync(bool); |
| 265 | |
| 266 | #define __HAVE_PMAP_PV_TRACK 1 |
| 267 | void pmap_pv_init(void); |
| 268 | void pmap_pv_track(paddr_t, psize_t); |
| 269 | void pmap_pv_untrack(paddr_t, psize_t); |
| 270 | |
| 271 | void pmap_map_ptes(struct pmap *, struct pmap **, pd_entry_t **, |
| 272 | pd_entry_t * const **); |
| 273 | void pmap_unmap_ptes(struct pmap *, struct pmap *); |
| 274 | |
| 275 | int pmap_pdes_invalid(vaddr_t, pd_entry_t * const *, pd_entry_t *); |
| 276 | |
| 277 | u_int x86_mmap_flags(paddr_t); |
| 278 | |
| 279 | bool pmap_is_curpmap(struct pmap *); |
| 280 | |
| 281 | vaddr_t reserve_dumppages(vaddr_t); /* XXX: not a pmap fn */ |
| 282 | |
| 283 | typedef enum tlbwhy { |
| 284 | TLBSHOOT_APTE, |
| 285 | TLBSHOOT_KENTER, |
| 286 | TLBSHOOT_KREMOVE, |
| 287 | TLBSHOOT_FREE_PTP1, |
| 288 | TLBSHOOT_FREE_PTP2, |
| 289 | TLBSHOOT_REMOVE_PTE, |
| 290 | TLBSHOOT_REMOVE_PTES, |
| 291 | TLBSHOOT_SYNC_PV1, |
| 292 | TLBSHOOT_SYNC_PV2, |
| 293 | TLBSHOOT_WRITE_PROTECT, |
| 294 | TLBSHOOT_ENTER, |
| 295 | TLBSHOOT_UPDATE, |
| 296 | TLBSHOOT_BUS_DMA, |
| 297 | TLBSHOOT_BUS_SPACE, |
| 298 | TLBSHOOT__MAX, |
| 299 | } tlbwhy_t; |
| 300 | |
| 301 | void pmap_tlb_init(void); |
| 302 | void pmap_tlb_cpu_init(struct cpu_info *); |
| 303 | void pmap_tlb_shootdown(pmap_t, vaddr_t, pt_entry_t, tlbwhy_t); |
| 304 | void pmap_tlb_shootnow(void); |
| 305 | void pmap_tlb_intr(void); |
| 306 | |
| 307 | #define __HAVE_PMAP_EMAP |
| 308 | |
| 309 | #define PMAP_GROWKERNEL /* turn on pmap_growkernel interface */ |
| 310 | #define PMAP_FORK /* turn on pmap_fork interface */ |
| 311 | |
| 312 | /* |
| 313 | * Do idle page zero'ing uncached to avoid polluting the cache. |
| 314 | */ |
| 315 | bool pmap_pageidlezero(paddr_t); |
| 316 | #define PMAP_PAGEIDLEZERO(pa) pmap_pageidlezero((pa)) |
| 317 | |
| 318 | /* |
| 319 | * inline functions |
| 320 | */ |
| 321 | |
| 322 | __inline static bool __unused |
| 323 | pmap_pdes_valid(vaddr_t va, pd_entry_t * const *pdes, pd_entry_t *lastpde) |
| 324 | { |
| 325 | return pmap_pdes_invalid(va, pdes, lastpde) == 0; |
| 326 | } |
| 327 | |
| 328 | /* |
| 329 | * pmap_update_pg: flush one page from the TLB (or flush the whole thing |
| 330 | * if hardware doesn't support one-page flushing) |
| 331 | */ |
| 332 | |
| 333 | __inline static void __unused |
| 334 | pmap_update_pg(vaddr_t va) |
| 335 | { |
| 336 | invlpg(va); |
| 337 | } |
| 338 | |
| 339 | /* |
| 340 | * pmap_update_2pg: flush two pages from the TLB |
| 341 | */ |
| 342 | |
| 343 | __inline static void __unused |
| 344 | pmap_update_2pg(vaddr_t va, vaddr_t vb) |
| 345 | { |
| 346 | invlpg(va); |
| 347 | invlpg(vb); |
| 348 | } |
| 349 | |
| 350 | /* |
| 351 | * pmap_page_protect: change the protection of all recorded mappings |
| 352 | * of a managed page |
| 353 | * |
| 354 | * => this function is a frontend for pmap_page_remove/pmap_clear_attrs |
| 355 | * => we only have to worry about making the page more protected. |
| 356 | * unprotecting a page is done on-demand at fault time. |
| 357 | */ |
| 358 | |
| 359 | __inline static void __unused |
| 360 | pmap_page_protect(struct vm_page *pg, vm_prot_t prot) |
| 361 | { |
| 362 | if ((prot & VM_PROT_WRITE) == 0) { |
| 363 | if (prot & (VM_PROT_READ|VM_PROT_EXECUTE)) { |
| 364 | (void) pmap_clear_attrs(pg, PG_RW); |
| 365 | } else { |
| 366 | pmap_page_remove(pg); |
| 367 | } |
| 368 | } |
| 369 | } |
| 370 | |
| 371 | /* |
| 372 | * pmap_pv_protect: change the protection of all recorded mappings |
| 373 | * of an unmanaged page |
| 374 | */ |
| 375 | |
| 376 | __inline static void __unused |
| 377 | pmap_pv_protect(paddr_t pa, vm_prot_t prot) |
| 378 | { |
| 379 | if ((prot & VM_PROT_WRITE) == 0) { |
| 380 | if (prot & (VM_PROT_READ|VM_PROT_EXECUTE)) { |
| 381 | (void) pmap_pv_clear_attrs(pa, PG_RW); |
| 382 | } else { |
| 383 | pmap_pv_remove(pa); |
| 384 | } |
| 385 | } |
| 386 | } |
| 387 | |
| 388 | /* |
| 389 | * pmap_protect: change the protection of pages in a pmap |
| 390 | * |
| 391 | * => this function is a frontend for pmap_remove/pmap_write_protect |
| 392 | * => we only have to worry about making the page more protected. |
| 393 | * unprotecting a page is done on-demand at fault time. |
| 394 | */ |
| 395 | |
| 396 | __inline static void __unused |
| 397 | pmap_protect(struct pmap *pmap, vaddr_t sva, vaddr_t eva, vm_prot_t prot) |
| 398 | { |
| 399 | if ((prot & VM_PROT_WRITE) == 0) { |
| 400 | if (prot & (VM_PROT_READ|VM_PROT_EXECUTE)) { |
| 401 | pmap_write_protect(pmap, sva, eva, prot); |
| 402 | } else { |
| 403 | pmap_remove(pmap, sva, eva); |
| 404 | } |
| 405 | } |
| 406 | } |
| 407 | |
| 408 | /* |
| 409 | * various address inlines |
| 410 | * |
| 411 | * vtopte: return a pointer to the PTE mapping a VA, works only for |
| 412 | * user and PT addresses |
| 413 | * |
| 414 | * kvtopte: return a pointer to the PTE mapping a kernel VA |
| 415 | */ |
| 416 | |
| 417 | #include <lib/libkern/libkern.h> |
| 418 | |
| 419 | static __inline pt_entry_t * __unused |
| 420 | vtopte(vaddr_t va) |
| 421 | { |
| 422 | |
| 423 | KASSERT(va < VM_MIN_KERNEL_ADDRESS); |
| 424 | |
| 425 | return (PTE_BASE + pl1_i(va)); |
| 426 | } |
| 427 | |
| 428 | static __inline pt_entry_t * __unused |
| 429 | kvtopte(vaddr_t va) |
| 430 | { |
| 431 | pd_entry_t *pde; |
| 432 | |
| 433 | KASSERT(va >= VM_MIN_KERNEL_ADDRESS); |
| 434 | |
| 435 | pde = L2_BASE + pl2_i(va); |
| 436 | if (*pde & PG_PS) |
| 437 | return ((pt_entry_t *)pde); |
| 438 | |
| 439 | return (PTE_BASE + pl1_i(va)); |
| 440 | } |
| 441 | |
| 442 | paddr_t vtophys(vaddr_t); |
| 443 | vaddr_t pmap_map(vaddr_t, paddr_t, paddr_t, vm_prot_t); |
| 444 | void pmap_cpu_init_late(struct cpu_info *); |
| 445 | bool sse2_idlezero_page(void *); |
| 446 | |
| 447 | #ifdef XEN |
| 448 | #include <sys/bitops.h> |
| 449 | |
| 450 | #define XPTE_MASK L1_FRAME |
| 451 | /* Selects the index of a PTE in (A)PTE_BASE */ |
| 452 | #define XPTE_SHIFT (L1_SHIFT - ilog2(sizeof(pt_entry_t))) |
| 453 | |
| 454 | /* PTE access inline fuctions */ |
| 455 | |
| 456 | /* |
| 457 | * Get the machine address of the pointed pte |
| 458 | * We use hardware MMU to get value so works only for levels 1-3 |
| 459 | */ |
| 460 | |
| 461 | static __inline paddr_t |
| 462 | xpmap_ptetomach(pt_entry_t *pte) |
| 463 | { |
| 464 | pt_entry_t *up_pte; |
| 465 | vaddr_t va = (vaddr_t) pte; |
| 466 | |
| 467 | va = ((va & XPTE_MASK) >> XPTE_SHIFT) | (vaddr_t) PTE_BASE; |
| 468 | up_pte = (pt_entry_t *) va; |
| 469 | |
| 470 | return (paddr_t) (((*up_pte) & PG_FRAME) + (((vaddr_t) pte) & (~PG_FRAME & ~VA_SIGN_MASK))); |
| 471 | } |
| 472 | |
| 473 | /* Xen helpers to change bits of a pte */ |
| 474 | #define XPMAP_UPDATE_DIRECT 1 /* Update direct map entry flags too */ |
| 475 | |
| 476 | paddr_t vtomach(vaddr_t); |
| 477 | #define vtomfn(va) (vtomach(va) >> PAGE_SHIFT) |
| 478 | #endif /* XEN */ |
| 479 | |
| 480 | /* pmap functions with machine addresses */ |
| 481 | void pmap_kenter_ma(vaddr_t, paddr_t, vm_prot_t, u_int); |
| 482 | int pmap_enter_ma(struct pmap *, vaddr_t, paddr_t, paddr_t, |
| 483 | vm_prot_t, u_int, int); |
| 484 | bool (pmap_t, vaddr_t, paddr_t *); |
| 485 | void pmap_free_ptps(struct vm_page *); |
| 486 | |
| 487 | /* |
| 488 | * Hooks for the pool allocator. |
| 489 | */ |
| 490 | #define POOL_VTOPHYS(va) vtophys((vaddr_t) (va)) |
| 491 | |
| 492 | #ifdef __HAVE_DIRECT_MAP |
| 493 | |
| 494 | #define L4_SLOT_DIRECT 509 |
| 495 | #define PDIR_SLOT_DIRECT L4_SLOT_DIRECT |
| 496 | |
| 497 | #define PMAP_DIRECT_BASE (VA_SIGN_NEG((L4_SLOT_DIRECT * NBPD_L4))) |
| 498 | #define PMAP_DIRECT_END (VA_SIGN_NEG(((L4_SLOT_DIRECT + 1) * NBPD_L4))) |
| 499 | |
| 500 | #define PMAP_DIRECT_MAP(pa) ((vaddr_t)PMAP_DIRECT_BASE + (pa)) |
| 501 | #define PMAP_DIRECT_UNMAP(va) ((paddr_t)(va) - PMAP_DIRECT_BASE) |
| 502 | |
| 503 | /* |
| 504 | * Alternate mapping hooks for pool pages. |
| 505 | */ |
| 506 | #define PMAP_MAP_POOLPAGE(pa) PMAP_DIRECT_MAP((pa)) |
| 507 | #define PMAP_UNMAP_POOLPAGE(va) PMAP_DIRECT_UNMAP((va)) |
| 508 | |
| 509 | void pagezero(vaddr_t); |
| 510 | |
| 511 | #endif /* __HAVE_DIRECT_MAP */ |
| 512 | |
| 513 | #endif /* _KERNEL */ |
| 514 | |
| 515 | #endif /* _X86_PMAP_H_ */ |
| 516 | |