1 /*- 2 * Copyright (c) 2001 The NetBSD Foundation, Inc. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to The NetBSD Foundation 6 * by Matt Thomas <matt@3am-software.com> of Allegro Networks, Inc. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 18 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 19 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 20 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 21 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 22 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 25 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 27 * POSSIBILITY OF SUCH DAMAGE. 28 */ 29 /*- 30 * Copyright (C) 1995, 1996 Wolfgang Solfrank. 31 * Copyright (C) 1995, 1996 TooLs GmbH. 32 * All rights reserved. 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 by TooLs GmbH. 45 * 4. The name of TooLs GmbH may not be used to endorse or promote products 46 * derived from this software without specific prior written permission. 47 * 48 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR 49 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 50 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 51 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 52 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 53 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 54 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 55 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 56 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 57 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 58 * 59 * $NetBSD: pmap.c,v 1.28 2000/03/26 20:42:36 kleink Exp $ 60 */ 61 /*- 62 * Copyright (C) 2001 Benno Rice. 63 * All rights reserved. 64 * 65 * Redistribution and use in source and binary forms, with or without 66 * modification, are permitted provided that the following conditions 67 * are met: 68 * 1. Redistributions of source code must retain the above copyright 69 * notice, this list of conditions and the following disclaimer. 70 * 2. Redistributions in binary form must reproduce the above copyright 71 * notice, this list of conditions and the following disclaimer in the 72 * documentation and/or other materials provided with the distribution. 73 * 74 * THIS SOFTWARE IS PROVIDED BY Benno Rice ``AS IS'' AND ANY EXPRESS OR 75 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 76 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 77 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 78 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 79 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 80 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 81 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 82 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 83 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 84 */ 85 86 #include <sys/cdefs.h> 87 __FBSDID("$FreeBSD$"); 88 89 /* 90 * Manages physical address maps. 91 * 92 * Since the information managed by this module is also stored by the 93 * logical address mapping module, this module may throw away valid virtual 94 * to physical mappings at almost any time. However, invalidations of 95 * mappings must be done as requested. 96 * 97 * In order to cope with hardware architectures which make virtual to 98 * physical map invalidates expensive, this module may delay invalidate 99 * reduced protection operations until such time as they are actually 100 * necessary. This module is given full information as to which processors 101 * are currently using which maps, and to when physical maps must be made 102 * correct. 103 */ 104 105 #include "opt_kstack_pages.h" 106 107 #include <sys/param.h> 108 #include <sys/kernel.h> 109 #include <sys/conf.h> 110 #include <sys/queue.h> 111 #include <sys/cpuset.h> 112 #include <sys/kerneldump.h> 113 #include <sys/ktr.h> 114 #include <sys/lock.h> 115 #include <sys/msgbuf.h> 116 #include <sys/mutex.h> 117 #include <sys/proc.h> 118 #include <sys/rwlock.h> 119 #include <sys/sched.h> 120 #include <sys/sysctl.h> 121 #include <sys/systm.h> 122 #include <sys/vmmeter.h> 123 124 #include <dev/ofw/openfirm.h> 125 126 #include <vm/vm.h> 127 #include <vm/vm_param.h> 128 #include <vm/vm_kern.h> 129 #include <vm/vm_page.h> 130 #include <vm/vm_map.h> 131 #include <vm/vm_object.h> 132 #include <vm/vm_extern.h> 133 #include <vm/vm_pageout.h> 134 #include <vm/uma.h> 135 136 #include <machine/cpu.h> 137 #include <machine/platform.h> 138 #include <machine/bat.h> 139 #include <machine/frame.h> 140 #include <machine/md_var.h> 141 #include <machine/psl.h> 142 #include <machine/pte.h> 143 #include <machine/smp.h> 144 #include <machine/sr.h> 145 #include <machine/mmuvar.h> 146 #include <machine/trap.h> 147 148 #include "mmu_if.h" 149 150 #define MOEA_DEBUG 151 152 #define TODO panic("%s: not implemented", __func__); 153 154 #define VSID_MAKE(sr, hash) ((sr) | (((hash) & 0xfffff) << 4)) 155 #define VSID_TO_SR(vsid) ((vsid) & 0xf) 156 #define VSID_TO_HASH(vsid) (((vsid) >> 4) & 0xfffff) 157 158 struct ofw_map { 159 vm_offset_t om_va; 160 vm_size_t om_len; 161 vm_offset_t om_pa; 162 u_int om_mode; 163 }; 164 165 extern unsigned char _etext[]; 166 extern unsigned char _end[]; 167 168 /* 169 * Map of physical memory regions. 170 */ 171 static struct mem_region *regions; 172 static struct mem_region *pregions; 173 static u_int phys_avail_count; 174 static int regions_sz, pregions_sz; 175 static struct ofw_map *translations; 176 177 /* 178 * Lock for the pteg and pvo tables. 179 */ 180 struct mtx moea_table_mutex; 181 struct mtx moea_vsid_mutex; 182 183 /* tlbie instruction synchronization */ 184 static struct mtx tlbie_mtx; 185 186 /* 187 * PTEG data. 188 */ 189 static struct pteg *moea_pteg_table; 190 u_int moea_pteg_count; 191 u_int moea_pteg_mask; 192 193 /* 194 * PVO data. 195 */ 196 struct pvo_head *moea_pvo_table; /* pvo entries by pteg index */ 197 struct pvo_head moea_pvo_kunmanaged = 198 LIST_HEAD_INITIALIZER(moea_pvo_kunmanaged); /* list of unmanaged pages */ 199 200 static struct rwlock_padalign pvh_global_lock; 201 202 uma_zone_t moea_upvo_zone; /* zone for pvo entries for unmanaged pages */ 203 uma_zone_t moea_mpvo_zone; /* zone for pvo entries for managed pages */ 204 205 #define BPVO_POOL_SIZE 32768 206 static struct pvo_entry *moea_bpvo_pool; 207 static int moea_bpvo_pool_index = 0; 208 209 #define VSID_NBPW (sizeof(u_int32_t) * 8) 210 static u_int moea_vsid_bitmap[NPMAPS / VSID_NBPW]; 211 212 static boolean_t moea_initialized = FALSE; 213 214 /* 215 * Statistics. 216 */ 217 u_int moea_pte_valid = 0; 218 u_int moea_pte_overflow = 0; 219 u_int moea_pte_replacements = 0; 220 u_int moea_pvo_entries = 0; 221 u_int moea_pvo_enter_calls = 0; 222 u_int moea_pvo_remove_calls = 0; 223 u_int moea_pte_spills = 0; 224 SYSCTL_INT(_machdep, OID_AUTO, moea_pte_valid, CTLFLAG_RD, &moea_pte_valid, 225 0, ""); 226 SYSCTL_INT(_machdep, OID_AUTO, moea_pte_overflow, CTLFLAG_RD, 227 &moea_pte_overflow, 0, ""); 228 SYSCTL_INT(_machdep, OID_AUTO, moea_pte_replacements, CTLFLAG_RD, 229 &moea_pte_replacements, 0, ""); 230 SYSCTL_INT(_machdep, OID_AUTO, moea_pvo_entries, CTLFLAG_RD, &moea_pvo_entries, 231 0, ""); 232 SYSCTL_INT(_machdep, OID_AUTO, moea_pvo_enter_calls, CTLFLAG_RD, 233 &moea_pvo_enter_calls, 0, ""); 234 SYSCTL_INT(_machdep, OID_AUTO, moea_pvo_remove_calls, CTLFLAG_RD, 235 &moea_pvo_remove_calls, 0, ""); 236 SYSCTL_INT(_machdep, OID_AUTO, moea_pte_spills, CTLFLAG_RD, 237 &moea_pte_spills, 0, ""); 238 239 /* 240 * Allocate physical memory for use in moea_bootstrap. 241 */ 242 static vm_offset_t moea_bootstrap_alloc(vm_size_t, u_int); 243 244 /* 245 * PTE calls. 246 */ 247 static int moea_pte_insert(u_int, struct pte *); 248 249 /* 250 * PVO calls. 251 */ 252 static int moea_pvo_enter(pmap_t, uma_zone_t, struct pvo_head *, 253 vm_offset_t, vm_paddr_t, u_int, int); 254 static void moea_pvo_remove(struct pvo_entry *, int); 255 static struct pvo_entry *moea_pvo_find_va(pmap_t, vm_offset_t, int *); 256 static struct pte *moea_pvo_to_pte(const struct pvo_entry *, int); 257 258 /* 259 * Utility routines. 260 */ 261 static int moea_enter_locked(pmap_t, vm_offset_t, vm_page_t, 262 vm_prot_t, u_int, int8_t); 263 static void moea_syncicache(vm_paddr_t, vm_size_t); 264 static boolean_t moea_query_bit(vm_page_t, int); 265 static u_int moea_clear_bit(vm_page_t, int); 266 static void moea_kremove(mmu_t, vm_offset_t); 267 int moea_pte_spill(vm_offset_t); 268 269 /* 270 * Kernel MMU interface 271 */ 272 void moea_clear_modify(mmu_t, vm_page_t); 273 void moea_copy_page(mmu_t, vm_page_t, vm_page_t); 274 void moea_copy_pages(mmu_t mmu, vm_page_t *ma, vm_offset_t a_offset, 275 vm_page_t *mb, vm_offset_t b_offset, int xfersize); 276 int moea_enter(mmu_t, pmap_t, vm_offset_t, vm_page_t, vm_prot_t, u_int, 277 int8_t); 278 void moea_enter_object(mmu_t, pmap_t, vm_offset_t, vm_offset_t, vm_page_t, 279 vm_prot_t); 280 void moea_enter_quick(mmu_t, pmap_t, vm_offset_t, vm_page_t, vm_prot_t); 281 vm_paddr_t moea_extract(mmu_t, pmap_t, vm_offset_t); 282 vm_page_t moea_extract_and_hold(mmu_t, pmap_t, vm_offset_t, vm_prot_t); 283 void moea_init(mmu_t); 284 boolean_t moea_is_modified(mmu_t, vm_page_t); 285 boolean_t moea_is_prefaultable(mmu_t, pmap_t, vm_offset_t); 286 boolean_t moea_is_referenced(mmu_t, vm_page_t); 287 int moea_ts_referenced(mmu_t, vm_page_t); 288 vm_offset_t moea_map(mmu_t, vm_offset_t *, vm_paddr_t, vm_paddr_t, int); 289 boolean_t moea_page_exists_quick(mmu_t, pmap_t, vm_page_t); 290 int moea_page_wired_mappings(mmu_t, vm_page_t); 291 void moea_pinit(mmu_t, pmap_t); 292 void moea_pinit0(mmu_t, pmap_t); 293 void moea_protect(mmu_t, pmap_t, vm_offset_t, vm_offset_t, vm_prot_t); 294 void moea_qenter(mmu_t, vm_offset_t, vm_page_t *, int); 295 void moea_qremove(mmu_t, vm_offset_t, int); 296 void moea_release(mmu_t, pmap_t); 297 void moea_remove(mmu_t, pmap_t, vm_offset_t, vm_offset_t); 298 void moea_remove_all(mmu_t, vm_page_t); 299 void moea_remove_write(mmu_t, vm_page_t); 300 void moea_unwire(mmu_t, pmap_t, vm_offset_t, vm_offset_t); 301 void moea_zero_page(mmu_t, vm_page_t); 302 void moea_zero_page_area(mmu_t, vm_page_t, int, int); 303 void moea_activate(mmu_t, struct thread *); 304 void moea_deactivate(mmu_t, struct thread *); 305 void moea_cpu_bootstrap(mmu_t, int); 306 void moea_bootstrap(mmu_t, vm_offset_t, vm_offset_t); 307 void *moea_mapdev(mmu_t, vm_paddr_t, vm_size_t); 308 void *moea_mapdev_attr(mmu_t, vm_paddr_t, vm_size_t, vm_memattr_t); 309 void moea_unmapdev(mmu_t, vm_offset_t, vm_size_t); 310 vm_paddr_t moea_kextract(mmu_t, vm_offset_t); 311 void moea_kenter_attr(mmu_t, vm_offset_t, vm_paddr_t, vm_memattr_t); 312 void moea_kenter(mmu_t, vm_offset_t, vm_paddr_t); 313 void moea_page_set_memattr(mmu_t mmu, vm_page_t m, vm_memattr_t ma); 314 boolean_t moea_dev_direct_mapped(mmu_t, vm_paddr_t, vm_size_t); 315 static void moea_sync_icache(mmu_t, pmap_t, vm_offset_t, vm_size_t); 316 void moea_dumpsys_map(mmu_t mmu, vm_paddr_t pa, size_t sz, void **va); 317 void moea_scan_init(mmu_t mmu); 318 vm_offset_t moea_quick_enter_page(mmu_t mmu, vm_page_t m); 319 void moea_quick_remove_page(mmu_t mmu, vm_offset_t addr); 320 321 static mmu_method_t moea_methods[] = { 322 MMUMETHOD(mmu_clear_modify, moea_clear_modify), 323 MMUMETHOD(mmu_copy_page, moea_copy_page), 324 MMUMETHOD(mmu_copy_pages, moea_copy_pages), 325 MMUMETHOD(mmu_enter, moea_enter), 326 MMUMETHOD(mmu_enter_object, moea_enter_object), 327 MMUMETHOD(mmu_enter_quick, moea_enter_quick), 328 MMUMETHOD(mmu_extract, moea_extract), 329 MMUMETHOD(mmu_extract_and_hold, moea_extract_and_hold), 330 MMUMETHOD(mmu_init, moea_init), 331 MMUMETHOD(mmu_is_modified, moea_is_modified), 332 MMUMETHOD(mmu_is_prefaultable, moea_is_prefaultable), 333 MMUMETHOD(mmu_is_referenced, moea_is_referenced), 334 MMUMETHOD(mmu_ts_referenced, moea_ts_referenced), 335 MMUMETHOD(mmu_map, moea_map), 336 MMUMETHOD(mmu_page_exists_quick,moea_page_exists_quick), 337 MMUMETHOD(mmu_page_wired_mappings,moea_page_wired_mappings), 338 MMUMETHOD(mmu_pinit, moea_pinit), 339 MMUMETHOD(mmu_pinit0, moea_pinit0), 340 MMUMETHOD(mmu_protect, moea_protect), 341 MMUMETHOD(mmu_qenter, moea_qenter), 342 MMUMETHOD(mmu_qremove, moea_qremove), 343 MMUMETHOD(mmu_release, moea_release), 344 MMUMETHOD(mmu_remove, moea_remove), 345 MMUMETHOD(mmu_remove_all, moea_remove_all), 346 MMUMETHOD(mmu_remove_write, moea_remove_write), 347 MMUMETHOD(mmu_sync_icache, moea_sync_icache), 348 MMUMETHOD(mmu_unwire, moea_unwire), 349 MMUMETHOD(mmu_zero_page, moea_zero_page), 350 MMUMETHOD(mmu_zero_page_area, moea_zero_page_area), 351 MMUMETHOD(mmu_activate, moea_activate), 352 MMUMETHOD(mmu_deactivate, moea_deactivate), 353 MMUMETHOD(mmu_page_set_memattr, moea_page_set_memattr), 354 MMUMETHOD(mmu_quick_enter_page, moea_quick_enter_page), 355 MMUMETHOD(mmu_quick_remove_page, moea_quick_remove_page), 356 357 /* Internal interfaces */ 358 MMUMETHOD(mmu_bootstrap, moea_bootstrap), 359 MMUMETHOD(mmu_cpu_bootstrap, moea_cpu_bootstrap), 360 MMUMETHOD(mmu_mapdev_attr, moea_mapdev_attr), 361 MMUMETHOD(mmu_mapdev, moea_mapdev), 362 MMUMETHOD(mmu_unmapdev, moea_unmapdev), 363 MMUMETHOD(mmu_kextract, moea_kextract), 364 MMUMETHOD(mmu_kenter, moea_kenter), 365 MMUMETHOD(mmu_kenter_attr, moea_kenter_attr), 366 MMUMETHOD(mmu_dev_direct_mapped,moea_dev_direct_mapped), 367 MMUMETHOD(mmu_scan_init, moea_scan_init), 368 MMUMETHOD(mmu_dumpsys_map, moea_dumpsys_map), 369 370 { 0, 0 } 371 }; 372 373 MMU_DEF(oea_mmu, MMU_TYPE_OEA, moea_methods, 0); 374 375 static __inline uint32_t 376 moea_calc_wimg(vm_paddr_t pa, vm_memattr_t ma) 377 { 378 uint32_t pte_lo; 379 int i; 380 381 if (ma != VM_MEMATTR_DEFAULT) { 382 switch (ma) { 383 case VM_MEMATTR_UNCACHEABLE: 384 return (PTE_I | PTE_G); 385 case VM_MEMATTR_CACHEABLE: 386 return (PTE_M); 387 case VM_MEMATTR_WRITE_COMBINING: 388 case VM_MEMATTR_WRITE_BACK: 389 case VM_MEMATTR_PREFETCHABLE: 390 return (PTE_I); 391 case VM_MEMATTR_WRITE_THROUGH: 392 return (PTE_W | PTE_M); 393 } 394 } 395 396 /* 397 * Assume the page is cache inhibited and access is guarded unless 398 * it's in our available memory array. 399 */ 400 pte_lo = PTE_I | PTE_G; 401 for (i = 0; i < pregions_sz; i++) { 402 if ((pa >= pregions[i].mr_start) && 403 (pa < (pregions[i].mr_start + pregions[i].mr_size))) { 404 pte_lo = PTE_M; 405 break; 406 } 407 } 408 409 return pte_lo; 410 } 411 412 static void 413 tlbie(vm_offset_t va) 414 { 415 416 mtx_lock_spin(&tlbie_mtx); 417 __asm __volatile("ptesync"); 418 __asm __volatile("tlbie %0" :: "r"(va)); 419 __asm __volatile("eieio; tlbsync; ptesync"); 420 mtx_unlock_spin(&tlbie_mtx); 421 } 422 423 static void 424 tlbia(void) 425 { 426 vm_offset_t va; 427 428 for (va = 0; va < 0x00040000; va += 0x00001000) { 429 __asm __volatile("tlbie %0" :: "r"(va)); 430 powerpc_sync(); 431 } 432 __asm __volatile("tlbsync"); 433 powerpc_sync(); 434 } 435 436 static __inline int 437 va_to_sr(u_int *sr, vm_offset_t va) 438 { 439 return (sr[(uintptr_t)va >> ADDR_SR_SHFT]); 440 } 441 442 static __inline u_int 443 va_to_pteg(u_int sr, vm_offset_t addr) 444 { 445 u_int hash; 446 447 hash = (sr & SR_VSID_MASK) ^ (((u_int)addr & ADDR_PIDX) >> 448 ADDR_PIDX_SHFT); 449 return (hash & moea_pteg_mask); 450 } 451 452 static __inline struct pvo_head * 453 vm_page_to_pvoh(vm_page_t m) 454 { 455 456 return (&m->md.mdpg_pvoh); 457 } 458 459 static __inline void 460 moea_attr_clear(vm_page_t m, int ptebit) 461 { 462 463 rw_assert(&pvh_global_lock, RA_WLOCKED); 464 m->md.mdpg_attrs &= ~ptebit; 465 } 466 467 static __inline int 468 moea_attr_fetch(vm_page_t m) 469 { 470 471 return (m->md.mdpg_attrs); 472 } 473 474 static __inline void 475 moea_attr_save(vm_page_t m, int ptebit) 476 { 477 478 rw_assert(&pvh_global_lock, RA_WLOCKED); 479 m->md.mdpg_attrs |= ptebit; 480 } 481 482 static __inline int 483 moea_pte_compare(const struct pte *pt, const struct pte *pvo_pt) 484 { 485 if (pt->pte_hi == pvo_pt->pte_hi) 486 return (1); 487 488 return (0); 489 } 490 491 static __inline int 492 moea_pte_match(struct pte *pt, u_int sr, vm_offset_t va, int which) 493 { 494 return (pt->pte_hi & ~PTE_VALID) == 495 (((sr & SR_VSID_MASK) << PTE_VSID_SHFT) | 496 ((va >> ADDR_API_SHFT) & PTE_API) | which); 497 } 498 499 static __inline void 500 moea_pte_create(struct pte *pt, u_int sr, vm_offset_t va, u_int pte_lo) 501 { 502 503 mtx_assert(&moea_table_mutex, MA_OWNED); 504 505 /* 506 * Construct a PTE. Default to IMB initially. Valid bit only gets 507 * set when the real pte is set in memory. 508 * 509 * Note: Don't set the valid bit for correct operation of tlb update. 510 */ 511 pt->pte_hi = ((sr & SR_VSID_MASK) << PTE_VSID_SHFT) | 512 (((va & ADDR_PIDX) >> ADDR_API_SHFT) & PTE_API); 513 pt->pte_lo = pte_lo; 514 } 515 516 static __inline void 517 moea_pte_synch(struct pte *pt, struct pte *pvo_pt) 518 { 519 520 mtx_assert(&moea_table_mutex, MA_OWNED); 521 pvo_pt->pte_lo |= pt->pte_lo & (PTE_REF | PTE_CHG); 522 } 523 524 static __inline void 525 moea_pte_clear(struct pte *pt, vm_offset_t va, int ptebit) 526 { 527 528 mtx_assert(&moea_table_mutex, MA_OWNED); 529 530 /* 531 * As shown in Section 7.6.3.2.3 532 */ 533 pt->pte_lo &= ~ptebit; 534 tlbie(va); 535 } 536 537 static __inline void 538 moea_pte_set(struct pte *pt, struct pte *pvo_pt) 539 { 540 541 mtx_assert(&moea_table_mutex, MA_OWNED); 542 pvo_pt->pte_hi |= PTE_VALID; 543 544 /* 545 * Update the PTE as defined in section 7.6.3.1. 546 * Note that the REF/CHG bits are from pvo_pt and thus should have 547 * been saved so this routine can restore them (if desired). 548 */ 549 pt->pte_lo = pvo_pt->pte_lo; 550 powerpc_sync(); 551 pt->pte_hi = pvo_pt->pte_hi; 552 powerpc_sync(); 553 moea_pte_valid++; 554 } 555 556 static __inline void 557 moea_pte_unset(struct pte *pt, struct pte *pvo_pt, vm_offset_t va) 558 { 559 560 mtx_assert(&moea_table_mutex, MA_OWNED); 561 pvo_pt->pte_hi &= ~PTE_VALID; 562 563 /* 564 * Force the reg & chg bits back into the PTEs. 565 */ 566 powerpc_sync(); 567 568 /* 569 * Invalidate the pte. 570 */ 571 pt->pte_hi &= ~PTE_VALID; 572 573 tlbie(va); 574 575 /* 576 * Save the reg & chg bits. 577 */ 578 moea_pte_synch(pt, pvo_pt); 579 moea_pte_valid--; 580 } 581 582 static __inline void 583 moea_pte_change(struct pte *pt, struct pte *pvo_pt, vm_offset_t va) 584 { 585 586 /* 587 * Invalidate the PTE 588 */ 589 moea_pte_unset(pt, pvo_pt, va); 590 moea_pte_set(pt, pvo_pt); 591 } 592 593 /* 594 * Quick sort callout for comparing memory regions. 595 */ 596 static int om_cmp(const void *a, const void *b); 597 598 static int 599 om_cmp(const void *a, const void *b) 600 { 601 const struct ofw_map *mapa; 602 const struct ofw_map *mapb; 603 604 mapa = a; 605 mapb = b; 606 if (mapa->om_pa < mapb->om_pa) 607 return (-1); 608 else if (mapa->om_pa > mapb->om_pa) 609 return (1); 610 else 611 return (0); 612 } 613 614 void 615 moea_cpu_bootstrap(mmu_t mmup, int ap) 616 { 617 u_int sdr; 618 int i; 619 620 if (ap) { 621 powerpc_sync(); 622 __asm __volatile("mtdbatu 0,%0" :: "r"(battable[0].batu)); 623 __asm __volatile("mtdbatl 0,%0" :: "r"(battable[0].batl)); 624 isync(); 625 __asm __volatile("mtibatu 0,%0" :: "r"(battable[0].batu)); 626 __asm __volatile("mtibatl 0,%0" :: "r"(battable[0].batl)); 627 isync(); 628 } 629 630 __asm __volatile("mtdbatu 1,%0" :: "r"(battable[8].batu)); 631 __asm __volatile("mtdbatl 1,%0" :: "r"(battable[8].batl)); 632 isync(); 633 634 __asm __volatile("mtibatu 1,%0" :: "r"(0)); 635 __asm __volatile("mtdbatu 2,%0" :: "r"(0)); 636 __asm __volatile("mtibatu 2,%0" :: "r"(0)); 637 __asm __volatile("mtdbatu 3,%0" :: "r"(0)); 638 __asm __volatile("mtibatu 3,%0" :: "r"(0)); 639 isync(); 640 641 for (i = 0; i < 16; i++) 642 mtsrin(i << ADDR_SR_SHFT, kernel_pmap->pm_sr[i]); 643 powerpc_sync(); 644 645 sdr = (u_int)moea_pteg_table | (moea_pteg_mask >> 10); 646 __asm __volatile("mtsdr1 %0" :: "r"(sdr)); 647 isync(); 648 649 tlbia(); 650 } 651 652 void 653 moea_bootstrap(mmu_t mmup, vm_offset_t kernelstart, vm_offset_t kernelend) 654 { 655 ihandle_t mmui; 656 phandle_t chosen, mmu; 657 int sz; 658 int i, j; 659 vm_size_t size, physsz, hwphyssz; 660 vm_offset_t pa, va, off; 661 void *dpcpu; 662 register_t msr; 663 664 /* 665 * Set up BAT0 to map the lowest 256 MB area 666 */ 667 battable[0x0].batl = BATL(0x00000000, BAT_M, BAT_PP_RW); 668 battable[0x0].batu = BATU(0x00000000, BAT_BL_256M, BAT_Vs); 669 670 /* 671 * Map PCI memory space. 672 */ 673 battable[0x8].batl = BATL(0x80000000, BAT_I|BAT_G, BAT_PP_RW); 674 battable[0x8].batu = BATU(0x80000000, BAT_BL_256M, BAT_Vs); 675 676 battable[0x9].batl = BATL(0x90000000, BAT_I|BAT_G, BAT_PP_RW); 677 battable[0x9].batu = BATU(0x90000000, BAT_BL_256M, BAT_Vs); 678 679 battable[0xa].batl = BATL(0xa0000000, BAT_I|BAT_G, BAT_PP_RW); 680 battable[0xa].batu = BATU(0xa0000000, BAT_BL_256M, BAT_Vs); 681 682 battable[0xb].batl = BATL(0xb0000000, BAT_I|BAT_G, BAT_PP_RW); 683 battable[0xb].batu = BATU(0xb0000000, BAT_BL_256M, BAT_Vs); 684 685 /* 686 * Map obio devices. 687 */ 688 battable[0xf].batl = BATL(0xf0000000, BAT_I|BAT_G, BAT_PP_RW); 689 battable[0xf].batu = BATU(0xf0000000, BAT_BL_256M, BAT_Vs); 690 691 /* 692 * Use an IBAT and a DBAT to map the bottom segment of memory 693 * where we are. Turn off instruction relocation temporarily 694 * to prevent faults while reprogramming the IBAT. 695 */ 696 msr = mfmsr(); 697 mtmsr(msr & ~PSL_IR); 698 __asm (".balign 32; \n" 699 "mtibatu 0,%0; mtibatl 0,%1; isync; \n" 700 "mtdbatu 0,%0; mtdbatl 0,%1; isync" 701 :: "r"(battable[0].batu), "r"(battable[0].batl)); 702 mtmsr(msr); 703 704 /* map pci space */ 705 __asm __volatile("mtdbatu 1,%0" :: "r"(battable[8].batu)); 706 __asm __volatile("mtdbatl 1,%0" :: "r"(battable[8].batl)); 707 isync(); 708 709 /* set global direct map flag */ 710 hw_direct_map = 1; 711 712 mem_regions(&pregions, &pregions_sz, ®ions, ®ions_sz); 713 CTR0(KTR_PMAP, "moea_bootstrap: physical memory"); 714 715 for (i = 0; i < pregions_sz; i++) { 716 vm_offset_t pa; 717 vm_offset_t end; 718 719 CTR3(KTR_PMAP, "physregion: %#x - %#x (%#x)", 720 pregions[i].mr_start, 721 pregions[i].mr_start + pregions[i].mr_size, 722 pregions[i].mr_size); 723 /* 724 * Install entries into the BAT table to allow all 725 * of physmem to be convered by on-demand BAT entries. 726 * The loop will sometimes set the same battable element 727 * twice, but that's fine since they won't be used for 728 * a while yet. 729 */ 730 pa = pregions[i].mr_start & 0xf0000000; 731 end = pregions[i].mr_start + pregions[i].mr_size; 732 do { 733 u_int n = pa >> ADDR_SR_SHFT; 734 735 battable[n].batl = BATL(pa, BAT_M, BAT_PP_RW); 736 battable[n].batu = BATU(pa, BAT_BL_256M, BAT_Vs); 737 pa += SEGMENT_LENGTH; 738 } while (pa < end); 739 } 740 741 if (sizeof(phys_avail)/sizeof(phys_avail[0]) < regions_sz) 742 panic("moea_bootstrap: phys_avail too small"); 743 744 phys_avail_count = 0; 745 physsz = 0; 746 hwphyssz = 0; 747 TUNABLE_ULONG_FETCH("hw.physmem", (u_long *) &hwphyssz); 748 for (i = 0, j = 0; i < regions_sz; i++, j += 2) { 749 CTR3(KTR_PMAP, "region: %#x - %#x (%#x)", regions[i].mr_start, 750 regions[i].mr_start + regions[i].mr_size, 751 regions[i].mr_size); 752 if (hwphyssz != 0 && 753 (physsz + regions[i].mr_size) >= hwphyssz) { 754 if (physsz < hwphyssz) { 755 phys_avail[j] = regions[i].mr_start; 756 phys_avail[j + 1] = regions[i].mr_start + 757 hwphyssz - physsz; 758 physsz = hwphyssz; 759 phys_avail_count++; 760 } 761 break; 762 } 763 phys_avail[j] = regions[i].mr_start; 764 phys_avail[j + 1] = regions[i].mr_start + regions[i].mr_size; 765 phys_avail_count++; 766 physsz += regions[i].mr_size; 767 } 768 769 /* Check for overlap with the kernel and exception vectors */ 770 for (j = 0; j < 2*phys_avail_count; j+=2) { 771 if (phys_avail[j] < EXC_LAST) 772 phys_avail[j] += EXC_LAST; 773 774 if (kernelstart >= phys_avail[j] && 775 kernelstart < phys_avail[j+1]) { 776 if (kernelend < phys_avail[j+1]) { 777 phys_avail[2*phys_avail_count] = 778 (kernelend & ~PAGE_MASK) + PAGE_SIZE; 779 phys_avail[2*phys_avail_count + 1] = 780 phys_avail[j+1]; 781 phys_avail_count++; 782 } 783 784 phys_avail[j+1] = kernelstart & ~PAGE_MASK; 785 } 786 787 if (kernelend >= phys_avail[j] && 788 kernelend < phys_avail[j+1]) { 789 if (kernelstart > phys_avail[j]) { 790 phys_avail[2*phys_avail_count] = phys_avail[j]; 791 phys_avail[2*phys_avail_count + 1] = 792 kernelstart & ~PAGE_MASK; 793 phys_avail_count++; 794 } 795 796 phys_avail[j] = (kernelend & ~PAGE_MASK) + PAGE_SIZE; 797 } 798 } 799 800 physmem = btoc(physsz); 801 802 /* 803 * Allocate PTEG table. 804 */ 805 #ifdef PTEGCOUNT 806 moea_pteg_count = PTEGCOUNT; 807 #else 808 moea_pteg_count = 0x1000; 809 810 while (moea_pteg_count < physmem) 811 moea_pteg_count <<= 1; 812 813 moea_pteg_count >>= 1; 814 #endif /* PTEGCOUNT */ 815 816 size = moea_pteg_count * sizeof(struct pteg); 817 CTR2(KTR_PMAP, "moea_bootstrap: %d PTEGs, %d bytes", moea_pteg_count, 818 size); 819 moea_pteg_table = (struct pteg *)moea_bootstrap_alloc(size, size); 820 CTR1(KTR_PMAP, "moea_bootstrap: PTEG table at %p", moea_pteg_table); 821 bzero((void *)moea_pteg_table, moea_pteg_count * sizeof(struct pteg)); 822 moea_pteg_mask = moea_pteg_count - 1; 823 824 /* 825 * Allocate pv/overflow lists. 826 */ 827 size = sizeof(struct pvo_head) * moea_pteg_count; 828 moea_pvo_table = (struct pvo_head *)moea_bootstrap_alloc(size, 829 PAGE_SIZE); 830 CTR1(KTR_PMAP, "moea_bootstrap: PVO table at %p", moea_pvo_table); 831 for (i = 0; i < moea_pteg_count; i++) 832 LIST_INIT(&moea_pvo_table[i]); 833 834 /* 835 * Initialize the lock that synchronizes access to the pteg and pvo 836 * tables. 837 */ 838 mtx_init(&moea_table_mutex, "pmap table", NULL, MTX_DEF | 839 MTX_RECURSE); 840 mtx_init(&moea_vsid_mutex, "VSID table", NULL, MTX_DEF); 841 842 mtx_init(&tlbie_mtx, "tlbie", NULL, MTX_SPIN); 843 844 /* 845 * Initialise the unmanaged pvo pool. 846 */ 847 moea_bpvo_pool = (struct pvo_entry *)moea_bootstrap_alloc( 848 BPVO_POOL_SIZE*sizeof(struct pvo_entry), 0); 849 moea_bpvo_pool_index = 0; 850 851 /* 852 * Make sure kernel vsid is allocated as well as VSID 0. 853 */ 854 moea_vsid_bitmap[(KERNEL_VSIDBITS & (NPMAPS - 1)) / VSID_NBPW] 855 |= 1 << (KERNEL_VSIDBITS % VSID_NBPW); 856 moea_vsid_bitmap[0] |= 1; 857 858 /* 859 * Initialize the kernel pmap (which is statically allocated). 860 */ 861 PMAP_LOCK_INIT(kernel_pmap); 862 for (i = 0; i < 16; i++) 863 kernel_pmap->pm_sr[i] = EMPTY_SEGMENT + i; 864 CPU_FILL(&kernel_pmap->pm_active); 865 RB_INIT(&kernel_pmap->pmap_pvo); 866 867 /* 868 * Initialize the global pv list lock. 869 */ 870 rw_init(&pvh_global_lock, "pmap pv global"); 871 872 /* 873 * Set up the Open Firmware mappings 874 */ 875 chosen = OF_finddevice("/chosen"); 876 if (chosen != -1 && OF_getprop(chosen, "mmu", &mmui, 4) != -1 && 877 (mmu = OF_instance_to_package(mmui)) != -1 && 878 (sz = OF_getproplen(mmu, "translations")) != -1) { 879 translations = NULL; 880 for (i = 0; phys_avail[i] != 0; i += 2) { 881 if (phys_avail[i + 1] >= sz) { 882 translations = (struct ofw_map *)phys_avail[i]; 883 break; 884 } 885 } 886 if (translations == NULL) 887 panic("moea_bootstrap: no space to copy translations"); 888 bzero(translations, sz); 889 if (OF_getprop(mmu, "translations", translations, sz) == -1) 890 panic("moea_bootstrap: can't get ofw translations"); 891 CTR0(KTR_PMAP, "moea_bootstrap: translations"); 892 sz /= sizeof(*translations); 893 qsort(translations, sz, sizeof (*translations), om_cmp); 894 for (i = 0; i < sz; i++) { 895 CTR3(KTR_PMAP, "translation: pa=%#x va=%#x len=%#x", 896 translations[i].om_pa, translations[i].om_va, 897 translations[i].om_len); 898 899 /* 900 * If the mapping is 1:1, let the RAM and device 901 * on-demand BAT tables take care of the translation. 902 */ 903 if (translations[i].om_va == translations[i].om_pa) 904 continue; 905 906 /* Enter the pages */ 907 for (off = 0; off < translations[i].om_len; 908 off += PAGE_SIZE) 909 moea_kenter(mmup, translations[i].om_va + off, 910 translations[i].om_pa + off); 911 } 912 } 913 914 /* 915 * Calculate the last available physical address. 916 */ 917 for (i = 0; phys_avail[i + 2] != 0; i += 2) 918 ; 919 Maxmem = powerpc_btop(phys_avail[i + 1]); 920 921 moea_cpu_bootstrap(mmup,0); 922 mtmsr(mfmsr() | PSL_DR | PSL_IR); 923 pmap_bootstrapped++; 924 925 /* 926 * Set the start and end of kva. 927 */ 928 virtual_avail = VM_MIN_KERNEL_ADDRESS; 929 virtual_end = VM_MAX_SAFE_KERNEL_ADDRESS; 930 931 /* 932 * Allocate a kernel stack with a guard page for thread0 and map it 933 * into the kernel page map. 934 */ 935 pa = moea_bootstrap_alloc(kstack_pages * PAGE_SIZE, PAGE_SIZE); 936 va = virtual_avail + KSTACK_GUARD_PAGES * PAGE_SIZE; 937 virtual_avail = va + kstack_pages * PAGE_SIZE; 938 CTR2(KTR_PMAP, "moea_bootstrap: kstack0 at %#x (%#x)", pa, va); 939 thread0.td_kstack = va; 940 thread0.td_kstack_pages = kstack_pages; 941 for (i = 0; i < kstack_pages; i++) { 942 moea_kenter(mmup, va, pa); 943 pa += PAGE_SIZE; 944 va += PAGE_SIZE; 945 } 946 947 /* 948 * Allocate virtual address space for the message buffer. 949 */ 950 pa = msgbuf_phys = moea_bootstrap_alloc(msgbufsize, PAGE_SIZE); 951 msgbufp = (struct msgbuf *)virtual_avail; 952 va = virtual_avail; 953 virtual_avail += round_page(msgbufsize); 954 while (va < virtual_avail) { 955 moea_kenter(mmup, va, pa); 956 pa += PAGE_SIZE; 957 va += PAGE_SIZE; 958 } 959 960 /* 961 * Allocate virtual address space for the dynamic percpu area. 962 */ 963 pa = moea_bootstrap_alloc(DPCPU_SIZE, PAGE_SIZE); 964 dpcpu = (void *)virtual_avail; 965 va = virtual_avail; 966 virtual_avail += DPCPU_SIZE; 967 while (va < virtual_avail) { 968 moea_kenter(mmup, va, pa); 969 pa += PAGE_SIZE; 970 va += PAGE_SIZE; 971 } 972 dpcpu_init(dpcpu, 0); 973 } 974 975 /* 976 * Activate a user pmap. The pmap must be activated before it's address 977 * space can be accessed in any way. 978 */ 979 void 980 moea_activate(mmu_t mmu, struct thread *td) 981 { 982 pmap_t pm, pmr; 983 984 /* 985 * Load all the data we need up front to encourage the compiler to 986 * not issue any loads while we have interrupts disabled below. 987 */ 988 pm = &td->td_proc->p_vmspace->vm_pmap; 989 pmr = pm->pmap_phys; 990 991 CPU_SET(PCPU_GET(cpuid), &pm->pm_active); 992 PCPU_SET(curpmap, pmr); 993 994 mtsrin(USER_SR << ADDR_SR_SHFT, td->td_pcb->pcb_cpu.aim.usr_vsid); 995 } 996 997 void 998 moea_deactivate(mmu_t mmu, struct thread *td) 999 { 1000 pmap_t pm; 1001 1002 pm = &td->td_proc->p_vmspace->vm_pmap; 1003 CPU_CLR(PCPU_GET(cpuid), &pm->pm_active); 1004 PCPU_SET(curpmap, NULL); 1005 } 1006 1007 void 1008 moea_unwire(mmu_t mmu, pmap_t pm, vm_offset_t sva, vm_offset_t eva) 1009 { 1010 struct pvo_entry key, *pvo; 1011 1012 PMAP_LOCK(pm); 1013 key.pvo_vaddr = sva; 1014 for (pvo = RB_NFIND(pvo_tree, &pm->pmap_pvo, &key); 1015 pvo != NULL && PVO_VADDR(pvo) < eva; 1016 pvo = RB_NEXT(pvo_tree, &pm->pmap_pvo, pvo)) { 1017 if ((pvo->pvo_vaddr & PVO_WIRED) == 0) 1018 panic("moea_unwire: pvo %p is missing PVO_WIRED", pvo); 1019 pvo->pvo_vaddr &= ~PVO_WIRED; 1020 pm->pm_stats.wired_count--; 1021 } 1022 PMAP_UNLOCK(pm); 1023 } 1024 1025 void 1026 moea_copy_page(mmu_t mmu, vm_page_t msrc, vm_page_t mdst) 1027 { 1028 vm_offset_t dst; 1029 vm_offset_t src; 1030 1031 dst = VM_PAGE_TO_PHYS(mdst); 1032 src = VM_PAGE_TO_PHYS(msrc); 1033 1034 bcopy((void *)src, (void *)dst, PAGE_SIZE); 1035 } 1036 1037 void 1038 moea_copy_pages(mmu_t mmu, vm_page_t *ma, vm_offset_t a_offset, 1039 vm_page_t *mb, vm_offset_t b_offset, int xfersize) 1040 { 1041 void *a_cp, *b_cp; 1042 vm_offset_t a_pg_offset, b_pg_offset; 1043 int cnt; 1044 1045 while (xfersize > 0) { 1046 a_pg_offset = a_offset & PAGE_MASK; 1047 cnt = min(xfersize, PAGE_SIZE - a_pg_offset); 1048 a_cp = (char *)VM_PAGE_TO_PHYS(ma[a_offset >> PAGE_SHIFT]) + 1049 a_pg_offset; 1050 b_pg_offset = b_offset & PAGE_MASK; 1051 cnt = min(cnt, PAGE_SIZE - b_pg_offset); 1052 b_cp = (char *)VM_PAGE_TO_PHYS(mb[b_offset >> PAGE_SHIFT]) + 1053 b_pg_offset; 1054 bcopy(a_cp, b_cp, cnt); 1055 a_offset += cnt; 1056 b_offset += cnt; 1057 xfersize -= cnt; 1058 } 1059 } 1060 1061 /* 1062 * Zero a page of physical memory by temporarily mapping it into the tlb. 1063 */ 1064 void 1065 moea_zero_page(mmu_t mmu, vm_page_t m) 1066 { 1067 vm_offset_t off, pa = VM_PAGE_TO_PHYS(m); 1068 1069 for (off = 0; off < PAGE_SIZE; off += cacheline_size) 1070 __asm __volatile("dcbz 0,%0" :: "r"(pa + off)); 1071 } 1072 1073 void 1074 moea_zero_page_area(mmu_t mmu, vm_page_t m, int off, int size) 1075 { 1076 vm_offset_t pa = VM_PAGE_TO_PHYS(m); 1077 void *va = (void *)(pa + off); 1078 1079 bzero(va, size); 1080 } 1081 1082 vm_offset_t 1083 moea_quick_enter_page(mmu_t mmu, vm_page_t m) 1084 { 1085 1086 return (VM_PAGE_TO_PHYS(m)); 1087 } 1088 1089 void 1090 moea_quick_remove_page(mmu_t mmu, vm_offset_t addr) 1091 { 1092 } 1093 1094 /* 1095 * Map the given physical page at the specified virtual address in the 1096 * target pmap with the protection requested. If specified the page 1097 * will be wired down. 1098 */ 1099 int 1100 moea_enter(mmu_t mmu, pmap_t pmap, vm_offset_t va, vm_page_t m, vm_prot_t prot, 1101 u_int flags, int8_t psind) 1102 { 1103 int error; 1104 1105 for (;;) { 1106 rw_wlock(&pvh_global_lock); 1107 PMAP_LOCK(pmap); 1108 error = moea_enter_locked(pmap, va, m, prot, flags, psind); 1109 rw_wunlock(&pvh_global_lock); 1110 PMAP_UNLOCK(pmap); 1111 if (error != ENOMEM) 1112 return (KERN_SUCCESS); 1113 if ((flags & PMAP_ENTER_NOSLEEP) != 0) 1114 return (KERN_RESOURCE_SHORTAGE); 1115 VM_OBJECT_ASSERT_UNLOCKED(m->object); 1116 VM_WAIT; 1117 } 1118 } 1119 1120 /* 1121 * Map the given physical page at the specified virtual address in the 1122 * target pmap with the protection requested. If specified the page 1123 * will be wired down. 1124 * 1125 * The global pvh and pmap must be locked. 1126 */ 1127 static int 1128 moea_enter_locked(pmap_t pmap, vm_offset_t va, vm_page_t m, vm_prot_t prot, 1129 u_int flags, int8_t psind __unused) 1130 { 1131 struct pvo_head *pvo_head; 1132 uma_zone_t zone; 1133 u_int pte_lo, pvo_flags; 1134 int error; 1135 1136 if (pmap_bootstrapped) 1137 rw_assert(&pvh_global_lock, RA_WLOCKED); 1138 PMAP_LOCK_ASSERT(pmap, MA_OWNED); 1139 if ((m->oflags & VPO_UNMANAGED) == 0 && !vm_page_xbusied(m)) 1140 VM_OBJECT_ASSERT_LOCKED(m->object); 1141 1142 if ((m->oflags & VPO_UNMANAGED) != 0 || !moea_initialized) { 1143 pvo_head = &moea_pvo_kunmanaged; 1144 zone = moea_upvo_zone; 1145 pvo_flags = 0; 1146 } else { 1147 pvo_head = vm_page_to_pvoh(m); 1148 zone = moea_mpvo_zone; 1149 pvo_flags = PVO_MANAGED; 1150 } 1151 1152 pte_lo = moea_calc_wimg(VM_PAGE_TO_PHYS(m), pmap_page_get_memattr(m)); 1153 1154 if (prot & VM_PROT_WRITE) { 1155 pte_lo |= PTE_BW; 1156 if (pmap_bootstrapped && 1157 (m->oflags & VPO_UNMANAGED) == 0) 1158 vm_page_aflag_set(m, PGA_WRITEABLE); 1159 } else 1160 pte_lo |= PTE_BR; 1161 1162 if ((flags & PMAP_ENTER_WIRED) != 0) 1163 pvo_flags |= PVO_WIRED; 1164 1165 error = moea_pvo_enter(pmap, zone, pvo_head, va, VM_PAGE_TO_PHYS(m), 1166 pte_lo, pvo_flags); 1167 1168 /* 1169 * Flush the real page from the instruction cache. This has be done 1170 * for all user mappings to prevent information leakage via the 1171 * instruction cache. moea_pvo_enter() returns ENOENT for the first 1172 * mapping for a page. 1173 */ 1174 if (pmap != kernel_pmap && error == ENOENT && 1175 (pte_lo & (PTE_I | PTE_G)) == 0) 1176 moea_syncicache(VM_PAGE_TO_PHYS(m), PAGE_SIZE); 1177 1178 return (error); 1179 } 1180 1181 /* 1182 * Maps a sequence of resident pages belonging to the same object. 1183 * The sequence begins with the given page m_start. This page is 1184 * mapped at the given virtual address start. Each subsequent page is 1185 * mapped at a virtual address that is offset from start by the same 1186 * amount as the page is offset from m_start within the object. The 1187 * last page in the sequence is the page with the largest offset from 1188 * m_start that can be mapped at a virtual address less than the given 1189 * virtual address end. Not every virtual page between start and end 1190 * is mapped; only those for which a resident page exists with the 1191 * corresponding offset from m_start are mapped. 1192 */ 1193 void 1194 moea_enter_object(mmu_t mmu, pmap_t pm, vm_offset_t start, vm_offset_t end, 1195 vm_page_t m_start, vm_prot_t prot) 1196 { 1197 vm_page_t m; 1198 vm_pindex_t diff, psize; 1199 1200 VM_OBJECT_ASSERT_LOCKED(m_start->object); 1201 1202 psize = atop(end - start); 1203 m = m_start; 1204 rw_wlock(&pvh_global_lock); 1205 PMAP_LOCK(pm); 1206 while (m != NULL && (diff = m->pindex - m_start->pindex) < psize) { 1207 moea_enter_locked(pm, start + ptoa(diff), m, prot & 1208 (VM_PROT_READ | VM_PROT_EXECUTE), 0, 0); 1209 m = TAILQ_NEXT(m, listq); 1210 } 1211 rw_wunlock(&pvh_global_lock); 1212 PMAP_UNLOCK(pm); 1213 } 1214 1215 void 1216 moea_enter_quick(mmu_t mmu, pmap_t pm, vm_offset_t va, vm_page_t m, 1217 vm_prot_t prot) 1218 { 1219 1220 rw_wlock(&pvh_global_lock); 1221 PMAP_LOCK(pm); 1222 moea_enter_locked(pm, va, m, prot & (VM_PROT_READ | VM_PROT_EXECUTE), 1223 0, 0); 1224 rw_wunlock(&pvh_global_lock); 1225 PMAP_UNLOCK(pm); 1226 } 1227 1228 vm_paddr_t 1229 moea_extract(mmu_t mmu, pmap_t pm, vm_offset_t va) 1230 { 1231 struct pvo_entry *pvo; 1232 vm_paddr_t pa; 1233 1234 PMAP_LOCK(pm); 1235 pvo = moea_pvo_find_va(pm, va & ~ADDR_POFF, NULL); 1236 if (pvo == NULL) 1237 pa = 0; 1238 else 1239 pa = (pvo->pvo_pte.pte.pte_lo & PTE_RPGN) | (va & ADDR_POFF); 1240 PMAP_UNLOCK(pm); 1241 return (pa); 1242 } 1243 1244 /* 1245 * Atomically extract and hold the physical page with the given 1246 * pmap and virtual address pair if that mapping permits the given 1247 * protection. 1248 */ 1249 vm_page_t 1250 moea_extract_and_hold(mmu_t mmu, pmap_t pmap, vm_offset_t va, vm_prot_t prot) 1251 { 1252 struct pvo_entry *pvo; 1253 vm_page_t m; 1254 vm_paddr_t pa; 1255 1256 m = NULL; 1257 pa = 0; 1258 PMAP_LOCK(pmap); 1259 retry: 1260 pvo = moea_pvo_find_va(pmap, va & ~ADDR_POFF, NULL); 1261 if (pvo != NULL && (pvo->pvo_pte.pte.pte_hi & PTE_VALID) && 1262 ((pvo->pvo_pte.pte.pte_lo & PTE_PP) == PTE_RW || 1263 (prot & VM_PROT_WRITE) == 0)) { 1264 if (vm_page_pa_tryrelock(pmap, pvo->pvo_pte.pte.pte_lo & PTE_RPGN, &pa)) 1265 goto retry; 1266 m = PHYS_TO_VM_PAGE(pvo->pvo_pte.pte.pte_lo & PTE_RPGN); 1267 vm_page_hold(m); 1268 } 1269 PA_UNLOCK_COND(pa); 1270 PMAP_UNLOCK(pmap); 1271 return (m); 1272 } 1273 1274 void 1275 moea_init(mmu_t mmu) 1276 { 1277 1278 moea_upvo_zone = uma_zcreate("UPVO entry", sizeof (struct pvo_entry), 1279 NULL, NULL, NULL, NULL, UMA_ALIGN_PTR, 1280 UMA_ZONE_VM | UMA_ZONE_NOFREE); 1281 moea_mpvo_zone = uma_zcreate("MPVO entry", sizeof(struct pvo_entry), 1282 NULL, NULL, NULL, NULL, UMA_ALIGN_PTR, 1283 UMA_ZONE_VM | UMA_ZONE_NOFREE); 1284 moea_initialized = TRUE; 1285 } 1286 1287 boolean_t 1288 moea_is_referenced(mmu_t mmu, vm_page_t m) 1289 { 1290 boolean_t rv; 1291 1292 KASSERT((m->oflags & VPO_UNMANAGED) == 0, 1293 ("moea_is_referenced: page %p is not managed", m)); 1294 rw_wlock(&pvh_global_lock); 1295 rv = moea_query_bit(m, PTE_REF); 1296 rw_wunlock(&pvh_global_lock); 1297 return (rv); 1298 } 1299 1300 boolean_t 1301 moea_is_modified(mmu_t mmu, vm_page_t m) 1302 { 1303 boolean_t rv; 1304 1305 KASSERT((m->oflags & VPO_UNMANAGED) == 0, 1306 ("moea_is_modified: page %p is not managed", m)); 1307 1308 /* 1309 * If the page is not exclusive busied, then PGA_WRITEABLE cannot be 1310 * concurrently set while the object is locked. Thus, if PGA_WRITEABLE 1311 * is clear, no PTEs can have PTE_CHG set. 1312 */ 1313 VM_OBJECT_ASSERT_WLOCKED(m->object); 1314 if (!vm_page_xbusied(m) && (m->aflags & PGA_WRITEABLE) == 0) 1315 return (FALSE); 1316 rw_wlock(&pvh_global_lock); 1317 rv = moea_query_bit(m, PTE_CHG); 1318 rw_wunlock(&pvh_global_lock); 1319 return (rv); 1320 } 1321 1322 boolean_t 1323 moea_is_prefaultable(mmu_t mmu, pmap_t pmap, vm_offset_t va) 1324 { 1325 struct pvo_entry *pvo; 1326 boolean_t rv; 1327 1328 PMAP_LOCK(pmap); 1329 pvo = moea_pvo_find_va(pmap, va & ~ADDR_POFF, NULL); 1330 rv = pvo == NULL || (pvo->pvo_pte.pte.pte_hi & PTE_VALID) == 0; 1331 PMAP_UNLOCK(pmap); 1332 return (rv); 1333 } 1334 1335 void 1336 moea_clear_modify(mmu_t mmu, vm_page_t m) 1337 { 1338 1339 KASSERT((m->oflags & VPO_UNMANAGED) == 0, 1340 ("moea_clear_modify: page %p is not managed", m)); 1341 VM_OBJECT_ASSERT_WLOCKED(m->object); 1342 KASSERT(!vm_page_xbusied(m), 1343 ("moea_clear_modify: page %p is exclusive busy", m)); 1344 1345 /* 1346 * If the page is not PGA_WRITEABLE, then no PTEs can have PTE_CHG 1347 * set. If the object containing the page is locked and the page is 1348 * not exclusive busied, then PGA_WRITEABLE cannot be concurrently set. 1349 */ 1350 if ((m->aflags & PGA_WRITEABLE) == 0) 1351 return; 1352 rw_wlock(&pvh_global_lock); 1353 moea_clear_bit(m, PTE_CHG); 1354 rw_wunlock(&pvh_global_lock); 1355 } 1356 1357 /* 1358 * Clear the write and modified bits in each of the given page's mappings. 1359 */ 1360 void 1361 moea_remove_write(mmu_t mmu, vm_page_t m) 1362 { 1363 struct pvo_entry *pvo; 1364 struct pte *pt; 1365 pmap_t pmap; 1366 u_int lo; 1367 1368 KASSERT((m->oflags & VPO_UNMANAGED) == 0, 1369 ("moea_remove_write: page %p is not managed", m)); 1370 1371 /* 1372 * If the page is not exclusive busied, then PGA_WRITEABLE cannot be 1373 * set by another thread while the object is locked. Thus, 1374 * if PGA_WRITEABLE is clear, no page table entries need updating. 1375 */ 1376 VM_OBJECT_ASSERT_WLOCKED(m->object); 1377 if (!vm_page_xbusied(m) && (m->aflags & PGA_WRITEABLE) == 0) 1378 return; 1379 rw_wlock(&pvh_global_lock); 1380 lo = moea_attr_fetch(m); 1381 powerpc_sync(); 1382 LIST_FOREACH(pvo, vm_page_to_pvoh(m), pvo_vlink) { 1383 pmap = pvo->pvo_pmap; 1384 PMAP_LOCK(pmap); 1385 if ((pvo->pvo_pte.pte.pte_lo & PTE_PP) != PTE_BR) { 1386 pt = moea_pvo_to_pte(pvo, -1); 1387 pvo->pvo_pte.pte.pte_lo &= ~PTE_PP; 1388 pvo->pvo_pte.pte.pte_lo |= PTE_BR; 1389 if (pt != NULL) { 1390 moea_pte_synch(pt, &pvo->pvo_pte.pte); 1391 lo |= pvo->pvo_pte.pte.pte_lo; 1392 pvo->pvo_pte.pte.pte_lo &= ~PTE_CHG; 1393 moea_pte_change(pt, &pvo->pvo_pte.pte, 1394 pvo->pvo_vaddr); 1395 mtx_unlock(&moea_table_mutex); 1396 } 1397 } 1398 PMAP_UNLOCK(pmap); 1399 } 1400 if ((lo & PTE_CHG) != 0) { 1401 moea_attr_clear(m, PTE_CHG); 1402 vm_page_dirty(m); 1403 } 1404 vm_page_aflag_clear(m, PGA_WRITEABLE); 1405 rw_wunlock(&pvh_global_lock); 1406 } 1407 1408 /* 1409 * moea_ts_referenced: 1410 * 1411 * Return a count of reference bits for a page, clearing those bits. 1412 * It is not necessary for every reference bit to be cleared, but it 1413 * is necessary that 0 only be returned when there are truly no 1414 * reference bits set. 1415 * 1416 * XXX: The exact number of bits to check and clear is a matter that 1417 * should be tested and standardized at some point in the future for 1418 * optimal aging of shared pages. 1419 */ 1420 int 1421 moea_ts_referenced(mmu_t mmu, vm_page_t m) 1422 { 1423 int count; 1424 1425 KASSERT((m->oflags & VPO_UNMANAGED) == 0, 1426 ("moea_ts_referenced: page %p is not managed", m)); 1427 rw_wlock(&pvh_global_lock); 1428 count = moea_clear_bit(m, PTE_REF); 1429 rw_wunlock(&pvh_global_lock); 1430 return (count); 1431 } 1432 1433 /* 1434 * Modify the WIMG settings of all mappings for a page. 1435 */ 1436 void 1437 moea_page_set_memattr(mmu_t mmu, vm_page_t m, vm_memattr_t ma) 1438 { 1439 struct pvo_entry *pvo; 1440 struct pvo_head *pvo_head; 1441 struct pte *pt; 1442 pmap_t pmap; 1443 u_int lo; 1444 1445 if ((m->oflags & VPO_UNMANAGED) != 0) { 1446 m->md.mdpg_cache_attrs = ma; 1447 return; 1448 } 1449 1450 rw_wlock(&pvh_global_lock); 1451 pvo_head = vm_page_to_pvoh(m); 1452 lo = moea_calc_wimg(VM_PAGE_TO_PHYS(m), ma); 1453 1454 LIST_FOREACH(pvo, pvo_head, pvo_vlink) { 1455 pmap = pvo->pvo_pmap; 1456 PMAP_LOCK(pmap); 1457 pt = moea_pvo_to_pte(pvo, -1); 1458 pvo->pvo_pte.pte.pte_lo &= ~PTE_WIMG; 1459 pvo->pvo_pte.pte.pte_lo |= lo; 1460 if (pt != NULL) { 1461 moea_pte_change(pt, &pvo->pvo_pte.pte, 1462 pvo->pvo_vaddr); 1463 if (pvo->pvo_pmap == kernel_pmap) 1464 isync(); 1465 } 1466 mtx_unlock(&moea_table_mutex); 1467 PMAP_UNLOCK(pmap); 1468 } 1469 m->md.mdpg_cache_attrs = ma; 1470 rw_wunlock(&pvh_global_lock); 1471 } 1472 1473 /* 1474 * Map a wired page into kernel virtual address space. 1475 */ 1476 void 1477 moea_kenter(mmu_t mmu, vm_offset_t va, vm_paddr_t pa) 1478 { 1479 1480 moea_kenter_attr(mmu, va, pa, VM_MEMATTR_DEFAULT); 1481 } 1482 1483 void 1484 moea_kenter_attr(mmu_t mmu, vm_offset_t va, vm_paddr_t pa, vm_memattr_t ma) 1485 { 1486 u_int pte_lo; 1487 int error; 1488 1489 #if 0 1490 if (va < VM_MIN_KERNEL_ADDRESS) 1491 panic("moea_kenter: attempt to enter non-kernel address %#x", 1492 va); 1493 #endif 1494 1495 pte_lo = moea_calc_wimg(pa, ma); 1496 1497 PMAP_LOCK(kernel_pmap); 1498 error = moea_pvo_enter(kernel_pmap, moea_upvo_zone, 1499 &moea_pvo_kunmanaged, va, pa, pte_lo, PVO_WIRED); 1500 1501 if (error != 0 && error != ENOENT) 1502 panic("moea_kenter: failed to enter va %#x pa %#x: %d", va, 1503 pa, error); 1504 1505 PMAP_UNLOCK(kernel_pmap); 1506 } 1507 1508 /* 1509 * Extract the physical page address associated with the given kernel virtual 1510 * address. 1511 */ 1512 vm_paddr_t 1513 moea_kextract(mmu_t mmu, vm_offset_t va) 1514 { 1515 struct pvo_entry *pvo; 1516 vm_paddr_t pa; 1517 1518 /* 1519 * Allow direct mappings on 32-bit OEA 1520 */ 1521 if (va < VM_MIN_KERNEL_ADDRESS) { 1522 return (va); 1523 } 1524 1525 PMAP_LOCK(kernel_pmap); 1526 pvo = moea_pvo_find_va(kernel_pmap, va & ~ADDR_POFF, NULL); 1527 KASSERT(pvo != NULL, ("moea_kextract: no addr found")); 1528 pa = (pvo->pvo_pte.pte.pte_lo & PTE_RPGN) | (va & ADDR_POFF); 1529 PMAP_UNLOCK(kernel_pmap); 1530 return (pa); 1531 } 1532 1533 /* 1534 * Remove a wired page from kernel virtual address space. 1535 */ 1536 void 1537 moea_kremove(mmu_t mmu, vm_offset_t va) 1538 { 1539 1540 moea_remove(mmu, kernel_pmap, va, va + PAGE_SIZE); 1541 } 1542 1543 /* 1544 * Map a range of physical addresses into kernel virtual address space. 1545 * 1546 * The value passed in *virt is a suggested virtual address for the mapping. 1547 * Architectures which can support a direct-mapped physical to virtual region 1548 * can return the appropriate address within that region, leaving '*virt' 1549 * unchanged. We cannot and therefore do not; *virt is updated with the 1550 * first usable address after the mapped region. 1551 */ 1552 vm_offset_t 1553 moea_map(mmu_t mmu, vm_offset_t *virt, vm_paddr_t pa_start, 1554 vm_paddr_t pa_end, int prot) 1555 { 1556 vm_offset_t sva, va; 1557 1558 sva = *virt; 1559 va = sva; 1560 for (; pa_start < pa_end; pa_start += PAGE_SIZE, va += PAGE_SIZE) 1561 moea_kenter(mmu, va, pa_start); 1562 *virt = va; 1563 return (sva); 1564 } 1565 1566 /* 1567 * Returns true if the pmap's pv is one of the first 1568 * 16 pvs linked to from this page. This count may 1569 * be changed upwards or downwards in the future; it 1570 * is only necessary that true be returned for a small 1571 * subset of pmaps for proper page aging. 1572 */ 1573 boolean_t 1574 moea_page_exists_quick(mmu_t mmu, pmap_t pmap, vm_page_t m) 1575 { 1576 int loops; 1577 struct pvo_entry *pvo; 1578 boolean_t rv; 1579 1580 KASSERT((m->oflags & VPO_UNMANAGED) == 0, 1581 ("moea_page_exists_quick: page %p is not managed", m)); 1582 loops = 0; 1583 rv = FALSE; 1584 rw_wlock(&pvh_global_lock); 1585 LIST_FOREACH(pvo, vm_page_to_pvoh(m), pvo_vlink) { 1586 if (pvo->pvo_pmap == pmap) { 1587 rv = TRUE; 1588 break; 1589 } 1590 if (++loops >= 16) 1591 break; 1592 } 1593 rw_wunlock(&pvh_global_lock); 1594 return (rv); 1595 } 1596 1597 /* 1598 * Return the number of managed mappings to the given physical page 1599 * that are wired. 1600 */ 1601 int 1602 moea_page_wired_mappings(mmu_t mmu, vm_page_t m) 1603 { 1604 struct pvo_entry *pvo; 1605 int count; 1606 1607 count = 0; 1608 if ((m->oflags & VPO_UNMANAGED) != 0) 1609 return (count); 1610 rw_wlock(&pvh_global_lock); 1611 LIST_FOREACH(pvo, vm_page_to_pvoh(m), pvo_vlink) 1612 if ((pvo->pvo_vaddr & PVO_WIRED) != 0) 1613 count++; 1614 rw_wunlock(&pvh_global_lock); 1615 return (count); 1616 } 1617 1618 static u_int moea_vsidcontext; 1619 1620 void 1621 moea_pinit(mmu_t mmu, pmap_t pmap) 1622 { 1623 int i, mask; 1624 u_int entropy; 1625 1626 KASSERT((int)pmap < VM_MIN_KERNEL_ADDRESS, ("moea_pinit: virt pmap")); 1627 RB_INIT(&pmap->pmap_pvo); 1628 1629 entropy = 0; 1630 __asm __volatile("mftb %0" : "=r"(entropy)); 1631 1632 if ((pmap->pmap_phys = (pmap_t)moea_kextract(mmu, (vm_offset_t)pmap)) 1633 == NULL) { 1634 pmap->pmap_phys = pmap; 1635 } 1636 1637 1638 mtx_lock(&moea_vsid_mutex); 1639 /* 1640 * Allocate some segment registers for this pmap. 1641 */ 1642 for (i = 0; i < NPMAPS; i += VSID_NBPW) { 1643 u_int hash, n; 1644 1645 /* 1646 * Create a new value by mutiplying by a prime and adding in 1647 * entropy from the timebase register. This is to make the 1648 * VSID more random so that the PT hash function collides 1649 * less often. (Note that the prime casues gcc to do shifts 1650 * instead of a multiply.) 1651 */ 1652 moea_vsidcontext = (moea_vsidcontext * 0x1105) + entropy; 1653 hash = moea_vsidcontext & (NPMAPS - 1); 1654 if (hash == 0) /* 0 is special, avoid it */ 1655 continue; 1656 n = hash >> 5; 1657 mask = 1 << (hash & (VSID_NBPW - 1)); 1658 hash = (moea_vsidcontext & 0xfffff); 1659 if (moea_vsid_bitmap[n] & mask) { /* collision? */ 1660 /* anything free in this bucket? */ 1661 if (moea_vsid_bitmap[n] == 0xffffffff) { 1662 entropy = (moea_vsidcontext >> 20); 1663 continue; 1664 } 1665 i = ffs(~moea_vsid_bitmap[n]) - 1; 1666 mask = 1 << i; 1667 hash &= rounddown2(0xfffff, VSID_NBPW); 1668 hash |= i; 1669 } 1670 KASSERT(!(moea_vsid_bitmap[n] & mask), 1671 ("Allocating in-use VSID group %#x\n", hash)); 1672 moea_vsid_bitmap[n] |= mask; 1673 for (i = 0; i < 16; i++) 1674 pmap->pm_sr[i] = VSID_MAKE(i, hash); 1675 mtx_unlock(&moea_vsid_mutex); 1676 return; 1677 } 1678 1679 mtx_unlock(&moea_vsid_mutex); 1680 panic("moea_pinit: out of segments"); 1681 } 1682 1683 /* 1684 * Initialize the pmap associated with process 0. 1685 */ 1686 void 1687 moea_pinit0(mmu_t mmu, pmap_t pm) 1688 { 1689 1690 PMAP_LOCK_INIT(pm); 1691 moea_pinit(mmu, pm); 1692 bzero(&pm->pm_stats, sizeof(pm->pm_stats)); 1693 } 1694 1695 /* 1696 * Set the physical protection on the specified range of this map as requested. 1697 */ 1698 void 1699 moea_protect(mmu_t mmu, pmap_t pm, vm_offset_t sva, vm_offset_t eva, 1700 vm_prot_t prot) 1701 { 1702 struct pvo_entry *pvo, *tpvo, key; 1703 struct pte *pt; 1704 1705 KASSERT(pm == &curproc->p_vmspace->vm_pmap || pm == kernel_pmap, 1706 ("moea_protect: non current pmap")); 1707 1708 if ((prot & VM_PROT_READ) == VM_PROT_NONE) { 1709 moea_remove(mmu, pm, sva, eva); 1710 return; 1711 } 1712 1713 rw_wlock(&pvh_global_lock); 1714 PMAP_LOCK(pm); 1715 key.pvo_vaddr = sva; 1716 for (pvo = RB_NFIND(pvo_tree, &pm->pmap_pvo, &key); 1717 pvo != NULL && PVO_VADDR(pvo) < eva; pvo = tpvo) { 1718 tpvo = RB_NEXT(pvo_tree, &pm->pmap_pvo, pvo); 1719 1720 /* 1721 * Grab the PTE pointer before we diddle with the cached PTE 1722 * copy. 1723 */ 1724 pt = moea_pvo_to_pte(pvo, -1); 1725 /* 1726 * Change the protection of the page. 1727 */ 1728 pvo->pvo_pte.pte.pte_lo &= ~PTE_PP; 1729 pvo->pvo_pte.pte.pte_lo |= PTE_BR; 1730 1731 /* 1732 * If the PVO is in the page table, update that pte as well. 1733 */ 1734 if (pt != NULL) { 1735 moea_pte_change(pt, &pvo->pvo_pte.pte, pvo->pvo_vaddr); 1736 mtx_unlock(&moea_table_mutex); 1737 } 1738 } 1739 rw_wunlock(&pvh_global_lock); 1740 PMAP_UNLOCK(pm); 1741 } 1742 1743 /* 1744 * Map a list of wired pages into kernel virtual address space. This is 1745 * intended for temporary mappings which do not need page modification or 1746 * references recorded. Existing mappings in the region are overwritten. 1747 */ 1748 void 1749 moea_qenter(mmu_t mmu, vm_offset_t sva, vm_page_t *m, int count) 1750 { 1751 vm_offset_t va; 1752 1753 va = sva; 1754 while (count-- > 0) { 1755 moea_kenter(mmu, va, VM_PAGE_TO_PHYS(*m)); 1756 va += PAGE_SIZE; 1757 m++; 1758 } 1759 } 1760 1761 /* 1762 * Remove page mappings from kernel virtual address space. Intended for 1763 * temporary mappings entered by moea_qenter. 1764 */ 1765 void 1766 moea_qremove(mmu_t mmu, vm_offset_t sva, int count) 1767 { 1768 vm_offset_t va; 1769 1770 va = sva; 1771 while (count-- > 0) { 1772 moea_kremove(mmu, va); 1773 va += PAGE_SIZE; 1774 } 1775 } 1776 1777 void 1778 moea_release(mmu_t mmu, pmap_t pmap) 1779 { 1780 int idx, mask; 1781 1782 /* 1783 * Free segment register's VSID 1784 */ 1785 if (pmap->pm_sr[0] == 0) 1786 panic("moea_release"); 1787 1788 mtx_lock(&moea_vsid_mutex); 1789 idx = VSID_TO_HASH(pmap->pm_sr[0]) & (NPMAPS-1); 1790 mask = 1 << (idx % VSID_NBPW); 1791 idx /= VSID_NBPW; 1792 moea_vsid_bitmap[idx] &= ~mask; 1793 mtx_unlock(&moea_vsid_mutex); 1794 } 1795 1796 /* 1797 * Remove the given range of addresses from the specified map. 1798 */ 1799 void 1800 moea_remove(mmu_t mmu, pmap_t pm, vm_offset_t sva, vm_offset_t eva) 1801 { 1802 struct pvo_entry *pvo, *tpvo, key; 1803 1804 rw_wlock(&pvh_global_lock); 1805 PMAP_LOCK(pm); 1806 key.pvo_vaddr = sva; 1807 for (pvo = RB_NFIND(pvo_tree, &pm->pmap_pvo, &key); 1808 pvo != NULL && PVO_VADDR(pvo) < eva; pvo = tpvo) { 1809 tpvo = RB_NEXT(pvo_tree, &pm->pmap_pvo, pvo); 1810 moea_pvo_remove(pvo, -1); 1811 } 1812 PMAP_UNLOCK(pm); 1813 rw_wunlock(&pvh_global_lock); 1814 } 1815 1816 /* 1817 * Remove physical page from all pmaps in which it resides. moea_pvo_remove() 1818 * will reflect changes in pte's back to the vm_page. 1819 */ 1820 void 1821 moea_remove_all(mmu_t mmu, vm_page_t m) 1822 { 1823 struct pvo_head *pvo_head; 1824 struct pvo_entry *pvo, *next_pvo; 1825 pmap_t pmap; 1826 1827 rw_wlock(&pvh_global_lock); 1828 pvo_head = vm_page_to_pvoh(m); 1829 for (pvo = LIST_FIRST(pvo_head); pvo != NULL; pvo = next_pvo) { 1830 next_pvo = LIST_NEXT(pvo, pvo_vlink); 1831 1832 pmap = pvo->pvo_pmap; 1833 PMAP_LOCK(pmap); 1834 moea_pvo_remove(pvo, -1); 1835 PMAP_UNLOCK(pmap); 1836 } 1837 if ((m->aflags & PGA_WRITEABLE) && moea_query_bit(m, PTE_CHG)) { 1838 moea_attr_clear(m, PTE_CHG); 1839 vm_page_dirty(m); 1840 } 1841 vm_page_aflag_clear(m, PGA_WRITEABLE); 1842 rw_wunlock(&pvh_global_lock); 1843 } 1844 1845 /* 1846 * Allocate a physical page of memory directly from the phys_avail map. 1847 * Can only be called from moea_bootstrap before avail start and end are 1848 * calculated. 1849 */ 1850 static vm_offset_t 1851 moea_bootstrap_alloc(vm_size_t size, u_int align) 1852 { 1853 vm_offset_t s, e; 1854 int i, j; 1855 1856 size = round_page(size); 1857 for (i = 0; phys_avail[i + 1] != 0; i += 2) { 1858 if (align != 0) 1859 s = roundup2(phys_avail[i], align); 1860 else 1861 s = phys_avail[i]; 1862 e = s + size; 1863 1864 if (s < phys_avail[i] || e > phys_avail[i + 1]) 1865 continue; 1866 1867 if (s == phys_avail[i]) { 1868 phys_avail[i] += size; 1869 } else if (e == phys_avail[i + 1]) { 1870 phys_avail[i + 1] -= size; 1871 } else { 1872 for (j = phys_avail_count * 2; j > i; j -= 2) { 1873 phys_avail[j] = phys_avail[j - 2]; 1874 phys_avail[j + 1] = phys_avail[j - 1]; 1875 } 1876 1877 phys_avail[i + 3] = phys_avail[i + 1]; 1878 phys_avail[i + 1] = s; 1879 phys_avail[i + 2] = e; 1880 phys_avail_count++; 1881 } 1882 1883 return (s); 1884 } 1885 panic("moea_bootstrap_alloc: could not allocate memory"); 1886 } 1887 1888 static void 1889 moea_syncicache(vm_paddr_t pa, vm_size_t len) 1890 { 1891 __syncicache((void *)pa, len); 1892 } 1893 1894 static int 1895 moea_pvo_enter(pmap_t pm, uma_zone_t zone, struct pvo_head *pvo_head, 1896 vm_offset_t va, vm_paddr_t pa, u_int pte_lo, int flags) 1897 { 1898 struct pvo_entry *pvo; 1899 u_int sr; 1900 int first; 1901 u_int ptegidx; 1902 int i; 1903 int bootstrap; 1904 1905 moea_pvo_enter_calls++; 1906 first = 0; 1907 bootstrap = 0; 1908 1909 /* 1910 * Compute the PTE Group index. 1911 */ 1912 va &= ~ADDR_POFF; 1913 sr = va_to_sr(pm->pm_sr, va); 1914 ptegidx = va_to_pteg(sr, va); 1915 1916 /* 1917 * Remove any existing mapping for this page. Reuse the pvo entry if 1918 * there is a mapping. 1919 */ 1920 mtx_lock(&moea_table_mutex); 1921 LIST_FOREACH(pvo, &moea_pvo_table[ptegidx], pvo_olink) { 1922 if (pvo->pvo_pmap == pm && PVO_VADDR(pvo) == va) { 1923 if ((pvo->pvo_pte.pte.pte_lo & PTE_RPGN) == pa && 1924 (pvo->pvo_pte.pte.pte_lo & PTE_PP) == 1925 (pte_lo & PTE_PP)) { 1926 /* 1927 * The PTE is not changing. Instead, this may 1928 * be a request to change the mapping's wired 1929 * attribute. 1930 */ 1931 mtx_unlock(&moea_table_mutex); 1932 if ((flags & PVO_WIRED) != 0 && 1933 (pvo->pvo_vaddr & PVO_WIRED) == 0) { 1934 pvo->pvo_vaddr |= PVO_WIRED; 1935 pm->pm_stats.wired_count++; 1936 } else if ((flags & PVO_WIRED) == 0 && 1937 (pvo->pvo_vaddr & PVO_WIRED) != 0) { 1938 pvo->pvo_vaddr &= ~PVO_WIRED; 1939 pm->pm_stats.wired_count--; 1940 } 1941 return (0); 1942 } 1943 moea_pvo_remove(pvo, -1); 1944 break; 1945 } 1946 } 1947 1948 /* 1949 * If we aren't overwriting a mapping, try to allocate. 1950 */ 1951 if (moea_initialized) { 1952 pvo = uma_zalloc(zone, M_NOWAIT); 1953 } else { 1954 if (moea_bpvo_pool_index >= BPVO_POOL_SIZE) { 1955 panic("moea_enter: bpvo pool exhausted, %d, %d, %d", 1956 moea_bpvo_pool_index, BPVO_POOL_SIZE, 1957 BPVO_POOL_SIZE * sizeof(struct pvo_entry)); 1958 } 1959 pvo = &moea_bpvo_pool[moea_bpvo_pool_index]; 1960 moea_bpvo_pool_index++; 1961 bootstrap = 1; 1962 } 1963 1964 if (pvo == NULL) { 1965 mtx_unlock(&moea_table_mutex); 1966 return (ENOMEM); 1967 } 1968 1969 moea_pvo_entries++; 1970 pvo->pvo_vaddr = va; 1971 pvo->pvo_pmap = pm; 1972 LIST_INSERT_HEAD(&moea_pvo_table[ptegidx], pvo, pvo_olink); 1973 pvo->pvo_vaddr &= ~ADDR_POFF; 1974 if (flags & PVO_WIRED) 1975 pvo->pvo_vaddr |= PVO_WIRED; 1976 if (pvo_head != &moea_pvo_kunmanaged) 1977 pvo->pvo_vaddr |= PVO_MANAGED; 1978 if (bootstrap) 1979 pvo->pvo_vaddr |= PVO_BOOTSTRAP; 1980 1981 moea_pte_create(&pvo->pvo_pte.pte, sr, va, pa | pte_lo); 1982 1983 /* 1984 * Add to pmap list 1985 */ 1986 RB_INSERT(pvo_tree, &pm->pmap_pvo, pvo); 1987 1988 /* 1989 * Remember if the list was empty and therefore will be the first 1990 * item. 1991 */ 1992 if (LIST_FIRST(pvo_head) == NULL) 1993 first = 1; 1994 LIST_INSERT_HEAD(pvo_head, pvo, pvo_vlink); 1995 1996 if (pvo->pvo_vaddr & PVO_WIRED) 1997 pm->pm_stats.wired_count++; 1998 pm->pm_stats.resident_count++; 1999 2000 i = moea_pte_insert(ptegidx, &pvo->pvo_pte.pte); 2001 KASSERT(i < 8, ("Invalid PTE index")); 2002 if (i >= 0) { 2003 PVO_PTEGIDX_SET(pvo, i); 2004 } else { 2005 panic("moea_pvo_enter: overflow"); 2006 moea_pte_overflow++; 2007 } 2008 mtx_unlock(&moea_table_mutex); 2009 2010 return (first ? ENOENT : 0); 2011 } 2012 2013 static void 2014 moea_pvo_remove(struct pvo_entry *pvo, int pteidx) 2015 { 2016 struct pte *pt; 2017 2018 /* 2019 * If there is an active pte entry, we need to deactivate it (and 2020 * save the ref & cfg bits). 2021 */ 2022 pt = moea_pvo_to_pte(pvo, pteidx); 2023 if (pt != NULL) { 2024 moea_pte_unset(pt, &pvo->pvo_pte.pte, pvo->pvo_vaddr); 2025 mtx_unlock(&moea_table_mutex); 2026 PVO_PTEGIDX_CLR(pvo); 2027 } else { 2028 moea_pte_overflow--; 2029 } 2030 2031 /* 2032 * Update our statistics. 2033 */ 2034 pvo->pvo_pmap->pm_stats.resident_count--; 2035 if (pvo->pvo_vaddr & PVO_WIRED) 2036 pvo->pvo_pmap->pm_stats.wired_count--; 2037 2038 /* 2039 * Save the REF/CHG bits into their cache if the page is managed. 2040 */ 2041 if ((pvo->pvo_vaddr & PVO_MANAGED) == PVO_MANAGED) { 2042 struct vm_page *pg; 2043 2044 pg = PHYS_TO_VM_PAGE(pvo->pvo_pte.pte.pte_lo & PTE_RPGN); 2045 if (pg != NULL) { 2046 moea_attr_save(pg, pvo->pvo_pte.pte.pte_lo & 2047 (PTE_REF | PTE_CHG)); 2048 } 2049 } 2050 2051 /* 2052 * Remove this PVO from the PV and pmap lists. 2053 */ 2054 LIST_REMOVE(pvo, pvo_vlink); 2055 RB_REMOVE(pvo_tree, &pvo->pvo_pmap->pmap_pvo, pvo); 2056 2057 /* 2058 * Remove this from the overflow list and return it to the pool 2059 * if we aren't going to reuse it. 2060 */ 2061 LIST_REMOVE(pvo, pvo_olink); 2062 if (!(pvo->pvo_vaddr & PVO_BOOTSTRAP)) 2063 uma_zfree(pvo->pvo_vaddr & PVO_MANAGED ? moea_mpvo_zone : 2064 moea_upvo_zone, pvo); 2065 moea_pvo_entries--; 2066 moea_pvo_remove_calls++; 2067 } 2068 2069 static __inline int 2070 moea_pvo_pte_index(const struct pvo_entry *pvo, int ptegidx) 2071 { 2072 int pteidx; 2073 2074 /* 2075 * We can find the actual pte entry without searching by grabbing 2076 * the PTEG index from 3 unused bits in pte_lo[11:9] and by 2077 * noticing the HID bit. 2078 */ 2079 pteidx = ptegidx * 8 + PVO_PTEGIDX_GET(pvo); 2080 if (pvo->pvo_pte.pte.pte_hi & PTE_HID) 2081 pteidx ^= moea_pteg_mask * 8; 2082 2083 return (pteidx); 2084 } 2085 2086 static struct pvo_entry * 2087 moea_pvo_find_va(pmap_t pm, vm_offset_t va, int *pteidx_p) 2088 { 2089 struct pvo_entry *pvo; 2090 int ptegidx; 2091 u_int sr; 2092 2093 va &= ~ADDR_POFF; 2094 sr = va_to_sr(pm->pm_sr, va); 2095 ptegidx = va_to_pteg(sr, va); 2096 2097 mtx_lock(&moea_table_mutex); 2098 LIST_FOREACH(pvo, &moea_pvo_table[ptegidx], pvo_olink) { 2099 if (pvo->pvo_pmap == pm && PVO_VADDR(pvo) == va) { 2100 if (pteidx_p) 2101 *pteidx_p = moea_pvo_pte_index(pvo, ptegidx); 2102 break; 2103 } 2104 } 2105 mtx_unlock(&moea_table_mutex); 2106 2107 return (pvo); 2108 } 2109 2110 static struct pte * 2111 moea_pvo_to_pte(const struct pvo_entry *pvo, int pteidx) 2112 { 2113 struct pte *pt; 2114 2115 /* 2116 * If we haven't been supplied the ptegidx, calculate it. 2117 */ 2118 if (pteidx == -1) { 2119 int ptegidx; 2120 u_int sr; 2121 2122 sr = va_to_sr(pvo->pvo_pmap->pm_sr, pvo->pvo_vaddr); 2123 ptegidx = va_to_pteg(sr, pvo->pvo_vaddr); 2124 pteidx = moea_pvo_pte_index(pvo, ptegidx); 2125 } 2126 2127 pt = &moea_pteg_table[pteidx >> 3].pt[pteidx & 7]; 2128 mtx_lock(&moea_table_mutex); 2129 2130 if ((pvo->pvo_pte.pte.pte_hi & PTE_VALID) && !PVO_PTEGIDX_ISSET(pvo)) { 2131 panic("moea_pvo_to_pte: pvo %p has valid pte in pvo but no " 2132 "valid pte index", pvo); 2133 } 2134 2135 if ((pvo->pvo_pte.pte.pte_hi & PTE_VALID) == 0 && PVO_PTEGIDX_ISSET(pvo)) { 2136 panic("moea_pvo_to_pte: pvo %p has valid pte index in pvo " 2137 "pvo but no valid pte", pvo); 2138 } 2139 2140 if ((pt->pte_hi ^ (pvo->pvo_pte.pte.pte_hi & ~PTE_VALID)) == PTE_VALID) { 2141 if ((pvo->pvo_pte.pte.pte_hi & PTE_VALID) == 0) { 2142 panic("moea_pvo_to_pte: pvo %p has valid pte in " 2143 "moea_pteg_table %p but invalid in pvo", pvo, pt); 2144 } 2145 2146 if (((pt->pte_lo ^ pvo->pvo_pte.pte.pte_lo) & ~(PTE_CHG|PTE_REF)) 2147 != 0) { 2148 panic("moea_pvo_to_pte: pvo %p pte does not match " 2149 "pte %p in moea_pteg_table", pvo, pt); 2150 } 2151 2152 mtx_assert(&moea_table_mutex, MA_OWNED); 2153 return (pt); 2154 } 2155 2156 if (pvo->pvo_pte.pte.pte_hi & PTE_VALID) { 2157 panic("moea_pvo_to_pte: pvo %p has invalid pte %p in " 2158 "moea_pteg_table but valid in pvo: %8x, %8x", pvo, pt, pvo->pvo_pte.pte.pte_hi, pt->pte_hi); 2159 } 2160 2161 mtx_unlock(&moea_table_mutex); 2162 return (NULL); 2163 } 2164 2165 /* 2166 * XXX: THIS STUFF SHOULD BE IN pte.c? 2167 */ 2168 int 2169 moea_pte_spill(vm_offset_t addr) 2170 { 2171 struct pvo_entry *source_pvo, *victim_pvo; 2172 struct pvo_entry *pvo; 2173 int ptegidx, i, j; 2174 u_int sr; 2175 struct pteg *pteg; 2176 struct pte *pt; 2177 2178 moea_pte_spills++; 2179 2180 sr = mfsrin(addr); 2181 ptegidx = va_to_pteg(sr, addr); 2182 2183 /* 2184 * Have to substitute some entry. Use the primary hash for this. 2185 * Use low bits of timebase as random generator. 2186 */ 2187 pteg = &moea_pteg_table[ptegidx]; 2188 mtx_lock(&moea_table_mutex); 2189 __asm __volatile("mftb %0" : "=r"(i)); 2190 i &= 7; 2191 pt = &pteg->pt[i]; 2192 2193 source_pvo = NULL; 2194 victim_pvo = NULL; 2195 LIST_FOREACH(pvo, &moea_pvo_table[ptegidx], pvo_olink) { 2196 /* 2197 * We need to find a pvo entry for this address. 2198 */ 2199 if (source_pvo == NULL && 2200 moea_pte_match(&pvo->pvo_pte.pte, sr, addr, 2201 pvo->pvo_pte.pte.pte_hi & PTE_HID)) { 2202 /* 2203 * Now found an entry to be spilled into the pteg. 2204 * The PTE is now valid, so we know it's active. 2205 */ 2206 j = moea_pte_insert(ptegidx, &pvo->pvo_pte.pte); 2207 2208 if (j >= 0) { 2209 PVO_PTEGIDX_SET(pvo, j); 2210 moea_pte_overflow--; 2211 mtx_unlock(&moea_table_mutex); 2212 return (1); 2213 } 2214 2215 source_pvo = pvo; 2216 2217 if (victim_pvo != NULL) 2218 break; 2219 } 2220 2221 /* 2222 * We also need the pvo entry of the victim we are replacing 2223 * so save the R & C bits of the PTE. 2224 */ 2225 if ((pt->pte_hi & PTE_HID) == 0 && victim_pvo == NULL && 2226 moea_pte_compare(pt, &pvo->pvo_pte.pte)) { 2227 victim_pvo = pvo; 2228 if (source_pvo != NULL) 2229 break; 2230 } 2231 } 2232 2233 if (source_pvo == NULL) { 2234 mtx_unlock(&moea_table_mutex); 2235 return (0); 2236 } 2237 2238 if (victim_pvo == NULL) { 2239 if ((pt->pte_hi & PTE_HID) == 0) 2240 panic("moea_pte_spill: victim p-pte (%p) has no pvo" 2241 "entry", pt); 2242 2243 /* 2244 * If this is a secondary PTE, we need to search it's primary 2245 * pvo bucket for the matching PVO. 2246 */ 2247 LIST_FOREACH(pvo, &moea_pvo_table[ptegidx ^ moea_pteg_mask], 2248 pvo_olink) { 2249 /* 2250 * We also need the pvo entry of the victim we are 2251 * replacing so save the R & C bits of the PTE. 2252 */ 2253 if (moea_pte_compare(pt, &pvo->pvo_pte.pte)) { 2254 victim_pvo = pvo; 2255 break; 2256 } 2257 } 2258 2259 if (victim_pvo == NULL) 2260 panic("moea_pte_spill: victim s-pte (%p) has no pvo" 2261 "entry", pt); 2262 } 2263 2264 /* 2265 * We are invalidating the TLB entry for the EA we are replacing even 2266 * though it's valid. If we don't, we lose any ref/chg bit changes 2267 * contained in the TLB entry. 2268 */ 2269 source_pvo->pvo_pte.pte.pte_hi &= ~PTE_HID; 2270 2271 moea_pte_unset(pt, &victim_pvo->pvo_pte.pte, victim_pvo->pvo_vaddr); 2272 moea_pte_set(pt, &source_pvo->pvo_pte.pte); 2273 2274 PVO_PTEGIDX_CLR(victim_pvo); 2275 PVO_PTEGIDX_SET(source_pvo, i); 2276 moea_pte_replacements++; 2277 2278 mtx_unlock(&moea_table_mutex); 2279 return (1); 2280 } 2281 2282 static __inline struct pvo_entry * 2283 moea_pte_spillable_ident(u_int ptegidx) 2284 { 2285 struct pte *pt; 2286 struct pvo_entry *pvo_walk, *pvo = NULL; 2287 2288 LIST_FOREACH(pvo_walk, &moea_pvo_table[ptegidx], pvo_olink) { 2289 if (pvo_walk->pvo_vaddr & PVO_WIRED) 2290 continue; 2291 2292 if (!(pvo_walk->pvo_pte.pte.pte_hi & PTE_VALID)) 2293 continue; 2294 2295 pt = moea_pvo_to_pte(pvo_walk, -1); 2296 2297 if (pt == NULL) 2298 continue; 2299 2300 pvo = pvo_walk; 2301 2302 mtx_unlock(&moea_table_mutex); 2303 if (!(pt->pte_lo & PTE_REF)) 2304 return (pvo_walk); 2305 } 2306 2307 return (pvo); 2308 } 2309 2310 static int 2311 moea_pte_insert(u_int ptegidx, struct pte *pvo_pt) 2312 { 2313 struct pte *pt; 2314 struct pvo_entry *victim_pvo; 2315 int i; 2316 int victim_idx; 2317 u_int pteg_bkpidx = ptegidx; 2318 2319 mtx_assert(&moea_table_mutex, MA_OWNED); 2320 2321 /* 2322 * First try primary hash. 2323 */ 2324 for (pt = moea_pteg_table[ptegidx].pt, i = 0; i < 8; i++, pt++) { 2325 if ((pt->pte_hi & PTE_VALID) == 0) { 2326 pvo_pt->pte_hi &= ~PTE_HID; 2327 moea_pte_set(pt, pvo_pt); 2328 return (i); 2329 } 2330 } 2331 2332 /* 2333 * Now try secondary hash. 2334 */ 2335 ptegidx ^= moea_pteg_mask; 2336 2337 for (pt = moea_pteg_table[ptegidx].pt, i = 0; i < 8; i++, pt++) { 2338 if ((pt->pte_hi & PTE_VALID) == 0) { 2339 pvo_pt->pte_hi |= PTE_HID; 2340 moea_pte_set(pt, pvo_pt); 2341 return (i); 2342 } 2343 } 2344 2345 /* Try again, but this time try to force a PTE out. */ 2346 ptegidx = pteg_bkpidx; 2347 2348 victim_pvo = moea_pte_spillable_ident(ptegidx); 2349 if (victim_pvo == NULL) { 2350 ptegidx ^= moea_pteg_mask; 2351 victim_pvo = moea_pte_spillable_ident(ptegidx); 2352 } 2353 2354 if (victim_pvo == NULL) { 2355 panic("moea_pte_insert: overflow"); 2356 return (-1); 2357 } 2358 2359 victim_idx = moea_pvo_pte_index(victim_pvo, ptegidx); 2360 2361 if (pteg_bkpidx == ptegidx) 2362 pvo_pt->pte_hi &= ~PTE_HID; 2363 else 2364 pvo_pt->pte_hi |= PTE_HID; 2365 2366 /* 2367 * Synchronize the sacrifice PTE with its PVO, then mark both 2368 * invalid. The PVO will be reused when/if the VM system comes 2369 * here after a fault. 2370 */ 2371 pt = &moea_pteg_table[victim_idx >> 3].pt[victim_idx & 7]; 2372 2373 if (pt->pte_hi != victim_pvo->pvo_pte.pte.pte_hi) 2374 panic("Victim PVO doesn't match PTE! PVO: %8x, PTE: %8x", victim_pvo->pvo_pte.pte.pte_hi, pt->pte_hi); 2375 2376 /* 2377 * Set the new PTE. 2378 */ 2379 moea_pte_unset(pt, &victim_pvo->pvo_pte.pte, victim_pvo->pvo_vaddr); 2380 PVO_PTEGIDX_CLR(victim_pvo); 2381 moea_pte_overflow++; 2382 moea_pte_set(pt, pvo_pt); 2383 2384 return (victim_idx & 7); 2385 } 2386 2387 static boolean_t 2388 moea_query_bit(vm_page_t m, int ptebit) 2389 { 2390 struct pvo_entry *pvo; 2391 struct pte *pt; 2392 2393 rw_assert(&pvh_global_lock, RA_WLOCKED); 2394 if (moea_attr_fetch(m) & ptebit) 2395 return (TRUE); 2396 2397 LIST_FOREACH(pvo, vm_page_to_pvoh(m), pvo_vlink) { 2398 2399 /* 2400 * See if we saved the bit off. If so, cache it and return 2401 * success. 2402 */ 2403 if (pvo->pvo_pte.pte.pte_lo & ptebit) { 2404 moea_attr_save(m, ptebit); 2405 return (TRUE); 2406 } 2407 } 2408 2409 /* 2410 * No luck, now go through the hard part of looking at the PTEs 2411 * themselves. Sync so that any pending REF/CHG bits are flushed to 2412 * the PTEs. 2413 */ 2414 powerpc_sync(); 2415 LIST_FOREACH(pvo, vm_page_to_pvoh(m), pvo_vlink) { 2416 2417 /* 2418 * See if this pvo has a valid PTE. if so, fetch the 2419 * REF/CHG bits from the valid PTE. If the appropriate 2420 * ptebit is set, cache it and return success. 2421 */ 2422 pt = moea_pvo_to_pte(pvo, -1); 2423 if (pt != NULL) { 2424 moea_pte_synch(pt, &pvo->pvo_pte.pte); 2425 mtx_unlock(&moea_table_mutex); 2426 if (pvo->pvo_pte.pte.pte_lo & ptebit) { 2427 moea_attr_save(m, ptebit); 2428 return (TRUE); 2429 } 2430 } 2431 } 2432 2433 return (FALSE); 2434 } 2435 2436 static u_int 2437 moea_clear_bit(vm_page_t m, int ptebit) 2438 { 2439 u_int count; 2440 struct pvo_entry *pvo; 2441 struct pte *pt; 2442 2443 rw_assert(&pvh_global_lock, RA_WLOCKED); 2444 2445 /* 2446 * Clear the cached value. 2447 */ 2448 moea_attr_clear(m, ptebit); 2449 2450 /* 2451 * Sync so that any pending REF/CHG bits are flushed to the PTEs (so 2452 * we can reset the right ones). note that since the pvo entries and 2453 * list heads are accessed via BAT0 and are never placed in the page 2454 * table, we don't have to worry about further accesses setting the 2455 * REF/CHG bits. 2456 */ 2457 powerpc_sync(); 2458 2459 /* 2460 * For each pvo entry, clear the pvo's ptebit. If this pvo has a 2461 * valid pte clear the ptebit from the valid pte. 2462 */ 2463 count = 0; 2464 LIST_FOREACH(pvo, vm_page_to_pvoh(m), pvo_vlink) { 2465 pt = moea_pvo_to_pte(pvo, -1); 2466 if (pt != NULL) { 2467 moea_pte_synch(pt, &pvo->pvo_pte.pte); 2468 if (pvo->pvo_pte.pte.pte_lo & ptebit) { 2469 count++; 2470 moea_pte_clear(pt, PVO_VADDR(pvo), ptebit); 2471 } 2472 mtx_unlock(&moea_table_mutex); 2473 } 2474 pvo->pvo_pte.pte.pte_lo &= ~ptebit; 2475 } 2476 2477 return (count); 2478 } 2479 2480 /* 2481 * Return true if the physical range is encompassed by the battable[idx] 2482 */ 2483 static int 2484 moea_bat_mapped(int idx, vm_paddr_t pa, vm_size_t size) 2485 { 2486 u_int prot; 2487 u_int32_t start; 2488 u_int32_t end; 2489 u_int32_t bat_ble; 2490 2491 /* 2492 * Return immediately if not a valid mapping 2493 */ 2494 if (!(battable[idx].batu & BAT_Vs)) 2495 return (EINVAL); 2496 2497 /* 2498 * The BAT entry must be cache-inhibited, guarded, and r/w 2499 * so it can function as an i/o page 2500 */ 2501 prot = battable[idx].batl & (BAT_I|BAT_G|BAT_PP_RW); 2502 if (prot != (BAT_I|BAT_G|BAT_PP_RW)) 2503 return (EPERM); 2504 2505 /* 2506 * The address should be within the BAT range. Assume that the 2507 * start address in the BAT has the correct alignment (thus 2508 * not requiring masking) 2509 */ 2510 start = battable[idx].batl & BAT_PBS; 2511 bat_ble = (battable[idx].batu & ~(BAT_EBS)) | 0x03; 2512 end = start | (bat_ble << 15) | 0x7fff; 2513 2514 if ((pa < start) || ((pa + size) > end)) 2515 return (ERANGE); 2516 2517 return (0); 2518 } 2519 2520 boolean_t 2521 moea_dev_direct_mapped(mmu_t mmu, vm_paddr_t pa, vm_size_t size) 2522 { 2523 int i; 2524 2525 /* 2526 * This currently does not work for entries that 2527 * overlap 256M BAT segments. 2528 */ 2529 2530 for(i = 0; i < 16; i++) 2531 if (moea_bat_mapped(i, pa, size) == 0) 2532 return (0); 2533 2534 return (EFAULT); 2535 } 2536 2537 /* 2538 * Map a set of physical memory pages into the kernel virtual 2539 * address space. Return a pointer to where it is mapped. This 2540 * routine is intended to be used for mapping device memory, 2541 * NOT real memory. 2542 */ 2543 void * 2544 moea_mapdev(mmu_t mmu, vm_paddr_t pa, vm_size_t size) 2545 { 2546 2547 return (moea_mapdev_attr(mmu, pa, size, VM_MEMATTR_DEFAULT)); 2548 } 2549 2550 void * 2551 moea_mapdev_attr(mmu_t mmu, vm_paddr_t pa, vm_size_t size, vm_memattr_t ma) 2552 { 2553 vm_offset_t va, tmpva, ppa, offset; 2554 int i; 2555 2556 ppa = trunc_page(pa); 2557 offset = pa & PAGE_MASK; 2558 size = roundup(offset + size, PAGE_SIZE); 2559 2560 /* 2561 * If the physical address lies within a valid BAT table entry, 2562 * return the 1:1 mapping. This currently doesn't work 2563 * for regions that overlap 256M BAT segments. 2564 */ 2565 for (i = 0; i < 16; i++) { 2566 if (moea_bat_mapped(i, pa, size) == 0) 2567 return ((void *) pa); 2568 } 2569 2570 va = kva_alloc(size); 2571 if (!va) 2572 panic("moea_mapdev: Couldn't alloc kernel virtual memory"); 2573 2574 for (tmpva = va; size > 0;) { 2575 moea_kenter_attr(mmu, tmpva, ppa, ma); 2576 tlbie(tmpva); 2577 size -= PAGE_SIZE; 2578 tmpva += PAGE_SIZE; 2579 ppa += PAGE_SIZE; 2580 } 2581 2582 return ((void *)(va + offset)); 2583 } 2584 2585 void 2586 moea_unmapdev(mmu_t mmu, vm_offset_t va, vm_size_t size) 2587 { 2588 vm_offset_t base, offset; 2589 2590 /* 2591 * If this is outside kernel virtual space, then it's a 2592 * battable entry and doesn't require unmapping 2593 */ 2594 if ((va >= VM_MIN_KERNEL_ADDRESS) && (va <= virtual_end)) { 2595 base = trunc_page(va); 2596 offset = va & PAGE_MASK; 2597 size = roundup(offset + size, PAGE_SIZE); 2598 kva_free(base, size); 2599 } 2600 } 2601 2602 static void 2603 moea_sync_icache(mmu_t mmu, pmap_t pm, vm_offset_t va, vm_size_t sz) 2604 { 2605 struct pvo_entry *pvo; 2606 vm_offset_t lim; 2607 vm_paddr_t pa; 2608 vm_size_t len; 2609 2610 PMAP_LOCK(pm); 2611 while (sz > 0) { 2612 lim = round_page(va); 2613 len = MIN(lim - va, sz); 2614 pvo = moea_pvo_find_va(pm, va & ~ADDR_POFF, NULL); 2615 if (pvo != NULL) { 2616 pa = (pvo->pvo_pte.pte.pte_lo & PTE_RPGN) | 2617 (va & ADDR_POFF); 2618 moea_syncicache(pa, len); 2619 } 2620 va += len; 2621 sz -= len; 2622 } 2623 PMAP_UNLOCK(pm); 2624 } 2625 2626 void 2627 moea_dumpsys_map(mmu_t mmu, vm_paddr_t pa, size_t sz, void **va) 2628 { 2629 2630 *va = (void *)pa; 2631 } 2632 2633 extern struct dump_pa dump_map[PHYS_AVAIL_SZ + 1]; 2634 2635 void 2636 moea_scan_init(mmu_t mmu) 2637 { 2638 struct pvo_entry *pvo; 2639 vm_offset_t va; 2640 int i; 2641 2642 if (!do_minidump) { 2643 /* Initialize phys. segments for dumpsys(). */ 2644 memset(&dump_map, 0, sizeof(dump_map)); 2645 mem_regions(&pregions, &pregions_sz, ®ions, ®ions_sz); 2646 for (i = 0; i < pregions_sz; i++) { 2647 dump_map[i].pa_start = pregions[i].mr_start; 2648 dump_map[i].pa_size = pregions[i].mr_size; 2649 } 2650 return; 2651 } 2652 2653 /* Virtual segments for minidumps: */ 2654 memset(&dump_map, 0, sizeof(dump_map)); 2655 2656 /* 1st: kernel .data and .bss. */ 2657 dump_map[0].pa_start = trunc_page((uintptr_t)_etext); 2658 dump_map[0].pa_size = 2659 round_page((uintptr_t)_end) - dump_map[0].pa_start; 2660 2661 /* 2nd: msgbuf and tables (see pmap_bootstrap()). */ 2662 dump_map[1].pa_start = (vm_paddr_t)msgbufp->msg_ptr; 2663 dump_map[1].pa_size = round_page(msgbufp->msg_size); 2664 2665 /* 3rd: kernel VM. */ 2666 va = dump_map[1].pa_start + dump_map[1].pa_size; 2667 /* Find start of next chunk (from va). */ 2668 while (va < virtual_end) { 2669 /* Don't dump the buffer cache. */ 2670 if (va >= kmi.buffer_sva && va < kmi.buffer_eva) { 2671 va = kmi.buffer_eva; 2672 continue; 2673 } 2674 pvo = moea_pvo_find_va(kernel_pmap, va & ~ADDR_POFF, NULL); 2675 if (pvo != NULL && (pvo->pvo_pte.pte.pte_hi & PTE_VALID)) 2676 break; 2677 va += PAGE_SIZE; 2678 } 2679 if (va < virtual_end) { 2680 dump_map[2].pa_start = va; 2681 va += PAGE_SIZE; 2682 /* Find last page in chunk. */ 2683 while (va < virtual_end) { 2684 /* Don't run into the buffer cache. */ 2685 if (va == kmi.buffer_sva) 2686 break; 2687 pvo = moea_pvo_find_va(kernel_pmap, va & ~ADDR_POFF, 2688 NULL); 2689 if (pvo == NULL || 2690 !(pvo->pvo_pte.pte.pte_hi & PTE_VALID)) 2691 break; 2692 va += PAGE_SIZE; 2693 } 2694 dump_map[2].pa_size = va - dump_map[2].pa_start; 2695 } 2696 } 2697