mmu_oea64.c revision 323968
1/*- 2 * Copyright (c) 2008-2015 Nathan Whitehorn 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27#include <sys/cdefs.h> 28__FBSDID("$FreeBSD: stable/11/sys/powerpc/aim/mmu_oea64.c 323968 2017-09-24 12:53:33Z markj $"); 29 30/* 31 * Manages physical address maps. 32 * 33 * Since the information managed by this module is also stored by the 34 * logical address mapping module, this module may throw away valid virtual 35 * to physical mappings at almost any time. However, invalidations of 36 * mappings must be done as requested. 37 * 38 * In order to cope with hardware architectures which make virtual to 39 * physical map invalidates expensive, this module may delay invalidate 40 * reduced protection operations until such time as they are actually 41 * necessary. This module is given full information as to which processors 42 * are currently using which maps, and to when physical maps must be made 43 * correct. 44 */ 45 46#include "opt_compat.h" 47#include "opt_kstack_pages.h" 48 49#include <sys/param.h> 50#include <sys/kernel.h> 51#include <sys/conf.h> 52#include <sys/queue.h> 53#include <sys/cpuset.h> 54#include <sys/kerneldump.h> 55#include <sys/ktr.h> 56#include <sys/lock.h> 57#include <sys/msgbuf.h> 58#include <sys/malloc.h> 59#include <sys/mutex.h> 60#include <sys/proc.h> 61#include <sys/rwlock.h> 62#include <sys/sched.h> 63#include <sys/sysctl.h> 64#include <sys/systm.h> 65#include <sys/vmmeter.h> 66#include <sys/smp.h> 67 68#include <sys/kdb.h> 69 70#include <dev/ofw/openfirm.h> 71 72#include <vm/vm.h> 73#include <vm/vm_param.h> 74#include <vm/vm_kern.h> 75#include <vm/vm_page.h> 76#include <vm/vm_map.h> 77#include <vm/vm_object.h> 78#include <vm/vm_extern.h> 79#include <vm/vm_pageout.h> 80#include <vm/uma.h> 81 82#include <machine/_inttypes.h> 83#include <machine/cpu.h> 84#include <machine/platform.h> 85#include <machine/frame.h> 86#include <machine/md_var.h> 87#include <machine/psl.h> 88#include <machine/bat.h> 89#include <machine/hid.h> 90#include <machine/pte.h> 91#include <machine/sr.h> 92#include <machine/trap.h> 93#include <machine/mmuvar.h> 94 95#include "mmu_oea64.h" 96#include "mmu_if.h" 97#include "moea64_if.h" 98 99void moea64_release_vsid(uint64_t vsid); 100uintptr_t moea64_get_unique_vsid(void); 101 102#define DISABLE_TRANS(msr) msr = mfmsr(); mtmsr(msr & ~PSL_DR) 103#define ENABLE_TRANS(msr) mtmsr(msr) 104 105#define VSID_MAKE(sr, hash) ((sr) | (((hash) & 0xfffff) << 4)) 106#define VSID_TO_HASH(vsid) (((vsid) >> 4) & 0xfffff) 107#define VSID_HASH_MASK 0x0000007fffffffffULL 108 109/* 110 * Locking semantics: 111 * 112 * There are two locks of interest: the page locks and the pmap locks, which 113 * protect their individual PVO lists and are locked in that order. The contents 114 * of all PVO entries are protected by the locks of their respective pmaps. 115 * The pmap of any PVO is guaranteed not to change so long as the PVO is linked 116 * into any list. 117 * 118 */ 119 120#define PV_LOCK_COUNT PA_LOCK_COUNT*3 121static struct mtx_padalign pv_lock[PV_LOCK_COUNT]; 122 123#define PV_LOCKPTR(pa) ((struct mtx *)(&pv_lock[pa_index(pa) % PV_LOCK_COUNT])) 124#define PV_LOCK(pa) mtx_lock(PV_LOCKPTR(pa)) 125#define PV_UNLOCK(pa) mtx_unlock(PV_LOCKPTR(pa)) 126#define PV_LOCKASSERT(pa) mtx_assert(PV_LOCKPTR(pa), MA_OWNED) 127#define PV_PAGE_LOCK(m) PV_LOCK(VM_PAGE_TO_PHYS(m)) 128#define PV_PAGE_UNLOCK(m) PV_UNLOCK(VM_PAGE_TO_PHYS(m)) 129#define PV_PAGE_LOCKASSERT(m) PV_LOCKASSERT(VM_PAGE_TO_PHYS(m)) 130 131struct ofw_map { 132 cell_t om_va; 133 cell_t om_len; 134 uint64_t om_pa; 135 cell_t om_mode; 136}; 137 138extern unsigned char _etext[]; 139extern unsigned char _end[]; 140 141/* 142 * Map of physical memory regions. 143 */ 144static struct mem_region *regions; 145static struct mem_region *pregions; 146static u_int phys_avail_count; 147static int regions_sz, pregions_sz; 148 149extern void bs_remap_earlyboot(void); 150 151/* 152 * Lock for the SLB tables. 153 */ 154struct mtx moea64_slb_mutex; 155 156/* 157 * PTEG data. 158 */ 159u_int moea64_pteg_count; 160u_int moea64_pteg_mask; 161 162/* 163 * PVO data. 164 */ 165 166uma_zone_t moea64_pvo_zone; /* zone for pvo entries */ 167 168static struct pvo_entry *moea64_bpvo_pool; 169static int moea64_bpvo_pool_index = 0; 170static int moea64_bpvo_pool_size = 327680; 171TUNABLE_INT("machdep.moea64_bpvo_pool_size", &moea64_bpvo_pool_size); 172SYSCTL_INT(_machdep, OID_AUTO, moea64_allocated_bpvo_entries, CTLFLAG_RD, 173 &moea64_bpvo_pool_index, 0, ""); 174 175#define VSID_NBPW (sizeof(u_int32_t) * 8) 176#ifdef __powerpc64__ 177#define NVSIDS (NPMAPS * 16) 178#define VSID_HASHMASK 0xffffffffUL 179#else 180#define NVSIDS NPMAPS 181#define VSID_HASHMASK 0xfffffUL 182#endif 183static u_int moea64_vsid_bitmap[NVSIDS / VSID_NBPW]; 184 185static boolean_t moea64_initialized = FALSE; 186 187/* 188 * Statistics. 189 */ 190u_int moea64_pte_valid = 0; 191u_int moea64_pte_overflow = 0; 192u_int moea64_pvo_entries = 0; 193u_int moea64_pvo_enter_calls = 0; 194u_int moea64_pvo_remove_calls = 0; 195SYSCTL_INT(_machdep, OID_AUTO, moea64_pte_valid, CTLFLAG_RD, 196 &moea64_pte_valid, 0, ""); 197SYSCTL_INT(_machdep, OID_AUTO, moea64_pte_overflow, CTLFLAG_RD, 198 &moea64_pte_overflow, 0, ""); 199SYSCTL_INT(_machdep, OID_AUTO, moea64_pvo_entries, CTLFLAG_RD, 200 &moea64_pvo_entries, 0, ""); 201SYSCTL_INT(_machdep, OID_AUTO, moea64_pvo_enter_calls, CTLFLAG_RD, 202 &moea64_pvo_enter_calls, 0, ""); 203SYSCTL_INT(_machdep, OID_AUTO, moea64_pvo_remove_calls, CTLFLAG_RD, 204 &moea64_pvo_remove_calls, 0, ""); 205 206vm_offset_t moea64_scratchpage_va[2]; 207struct pvo_entry *moea64_scratchpage_pvo[2]; 208struct mtx moea64_scratchpage_mtx; 209 210uint64_t moea64_large_page_mask = 0; 211uint64_t moea64_large_page_size = 0; 212int moea64_large_page_shift = 0; 213 214/* 215 * PVO calls. 216 */ 217static int moea64_pvo_enter(mmu_t mmu, struct pvo_entry *pvo, 218 struct pvo_head *pvo_head); 219static void moea64_pvo_remove_from_pmap(mmu_t mmu, struct pvo_entry *pvo); 220static void moea64_pvo_remove_from_page(mmu_t mmu, struct pvo_entry *pvo); 221static struct pvo_entry *moea64_pvo_find_va(pmap_t, vm_offset_t); 222 223/* 224 * Utility routines. 225 */ 226static boolean_t moea64_query_bit(mmu_t, vm_page_t, uint64_t); 227static u_int moea64_clear_bit(mmu_t, vm_page_t, uint64_t); 228static void moea64_kremove(mmu_t, vm_offset_t); 229static void moea64_syncicache(mmu_t, pmap_t pmap, vm_offset_t va, 230 vm_paddr_t pa, vm_size_t sz); 231static void moea64_pmap_init_qpages(void); 232 233/* 234 * Kernel MMU interface 235 */ 236void moea64_clear_modify(mmu_t, vm_page_t); 237void moea64_copy_page(mmu_t, vm_page_t, vm_page_t); 238void moea64_copy_pages(mmu_t mmu, vm_page_t *ma, vm_offset_t a_offset, 239 vm_page_t *mb, vm_offset_t b_offset, int xfersize); 240int moea64_enter(mmu_t, pmap_t, vm_offset_t, vm_page_t, vm_prot_t, 241 u_int flags, int8_t psind); 242void moea64_enter_object(mmu_t, pmap_t, vm_offset_t, vm_offset_t, vm_page_t, 243 vm_prot_t); 244void moea64_enter_quick(mmu_t, pmap_t, vm_offset_t, vm_page_t, vm_prot_t); 245vm_paddr_t moea64_extract(mmu_t, pmap_t, vm_offset_t); 246vm_page_t moea64_extract_and_hold(mmu_t, pmap_t, vm_offset_t, vm_prot_t); 247void moea64_init(mmu_t); 248boolean_t moea64_is_modified(mmu_t, vm_page_t); 249boolean_t moea64_is_prefaultable(mmu_t, pmap_t, vm_offset_t); 250boolean_t moea64_is_referenced(mmu_t, vm_page_t); 251int moea64_ts_referenced(mmu_t, vm_page_t); 252vm_offset_t moea64_map(mmu_t, vm_offset_t *, vm_paddr_t, vm_paddr_t, int); 253boolean_t moea64_page_exists_quick(mmu_t, pmap_t, vm_page_t); 254void moea64_page_init(mmu_t, vm_page_t); 255int moea64_page_wired_mappings(mmu_t, vm_page_t); 256void moea64_pinit(mmu_t, pmap_t); 257void moea64_pinit0(mmu_t, pmap_t); 258void moea64_protect(mmu_t, pmap_t, vm_offset_t, vm_offset_t, vm_prot_t); 259void moea64_qenter(mmu_t, vm_offset_t, vm_page_t *, int); 260void moea64_qremove(mmu_t, vm_offset_t, int); 261void moea64_release(mmu_t, pmap_t); 262void moea64_remove(mmu_t, pmap_t, vm_offset_t, vm_offset_t); 263void moea64_remove_pages(mmu_t, pmap_t); 264void moea64_remove_all(mmu_t, vm_page_t); 265void moea64_remove_write(mmu_t, vm_page_t); 266void moea64_unwire(mmu_t, pmap_t, vm_offset_t, vm_offset_t); 267void moea64_zero_page(mmu_t, vm_page_t); 268void moea64_zero_page_area(mmu_t, vm_page_t, int, int); 269void moea64_zero_page_idle(mmu_t, vm_page_t); 270void moea64_activate(mmu_t, struct thread *); 271void moea64_deactivate(mmu_t, struct thread *); 272void *moea64_mapdev(mmu_t, vm_paddr_t, vm_size_t); 273void *moea64_mapdev_attr(mmu_t, vm_paddr_t, vm_size_t, vm_memattr_t); 274void moea64_unmapdev(mmu_t, vm_offset_t, vm_size_t); 275vm_paddr_t moea64_kextract(mmu_t, vm_offset_t); 276void moea64_page_set_memattr(mmu_t, vm_page_t m, vm_memattr_t ma); 277void moea64_kenter_attr(mmu_t, vm_offset_t, vm_paddr_t, vm_memattr_t ma); 278void moea64_kenter(mmu_t, vm_offset_t, vm_paddr_t); 279boolean_t moea64_dev_direct_mapped(mmu_t, vm_paddr_t, vm_size_t); 280static void moea64_sync_icache(mmu_t, pmap_t, vm_offset_t, vm_size_t); 281void moea64_dumpsys_map(mmu_t mmu, vm_paddr_t pa, size_t sz, 282 void **va); 283void moea64_scan_init(mmu_t mmu); 284vm_offset_t moea64_quick_enter_page(mmu_t mmu, vm_page_t m); 285void moea64_quick_remove_page(mmu_t mmu, vm_offset_t addr); 286 287static mmu_method_t moea64_methods[] = { 288 MMUMETHOD(mmu_clear_modify, moea64_clear_modify), 289 MMUMETHOD(mmu_copy_page, moea64_copy_page), 290 MMUMETHOD(mmu_copy_pages, moea64_copy_pages), 291 MMUMETHOD(mmu_enter, moea64_enter), 292 MMUMETHOD(mmu_enter_object, moea64_enter_object), 293 MMUMETHOD(mmu_enter_quick, moea64_enter_quick), 294 MMUMETHOD(mmu_extract, moea64_extract), 295 MMUMETHOD(mmu_extract_and_hold, moea64_extract_and_hold), 296 MMUMETHOD(mmu_init, moea64_init), 297 MMUMETHOD(mmu_is_modified, moea64_is_modified), 298 MMUMETHOD(mmu_is_prefaultable, moea64_is_prefaultable), 299 MMUMETHOD(mmu_is_referenced, moea64_is_referenced), 300 MMUMETHOD(mmu_ts_referenced, moea64_ts_referenced), 301 MMUMETHOD(mmu_map, moea64_map), 302 MMUMETHOD(mmu_page_exists_quick,moea64_page_exists_quick), 303 MMUMETHOD(mmu_page_init, moea64_page_init), 304 MMUMETHOD(mmu_page_wired_mappings,moea64_page_wired_mappings), 305 MMUMETHOD(mmu_pinit, moea64_pinit), 306 MMUMETHOD(mmu_pinit0, moea64_pinit0), 307 MMUMETHOD(mmu_protect, moea64_protect), 308 MMUMETHOD(mmu_qenter, moea64_qenter), 309 MMUMETHOD(mmu_qremove, moea64_qremove), 310 MMUMETHOD(mmu_release, moea64_release), 311 MMUMETHOD(mmu_remove, moea64_remove), 312 MMUMETHOD(mmu_remove_pages, moea64_remove_pages), 313 MMUMETHOD(mmu_remove_all, moea64_remove_all), 314 MMUMETHOD(mmu_remove_write, moea64_remove_write), 315 MMUMETHOD(mmu_sync_icache, moea64_sync_icache), 316 MMUMETHOD(mmu_unwire, moea64_unwire), 317 MMUMETHOD(mmu_zero_page, moea64_zero_page), 318 MMUMETHOD(mmu_zero_page_area, moea64_zero_page_area), 319 MMUMETHOD(mmu_zero_page_idle, moea64_zero_page_idle), 320 MMUMETHOD(mmu_activate, moea64_activate), 321 MMUMETHOD(mmu_deactivate, moea64_deactivate), 322 MMUMETHOD(mmu_page_set_memattr, moea64_page_set_memattr), 323 MMUMETHOD(mmu_quick_enter_page, moea64_quick_enter_page), 324 MMUMETHOD(mmu_quick_remove_page, moea64_quick_remove_page), 325 326 /* Internal interfaces */ 327 MMUMETHOD(mmu_mapdev, moea64_mapdev), 328 MMUMETHOD(mmu_mapdev_attr, moea64_mapdev_attr), 329 MMUMETHOD(mmu_unmapdev, moea64_unmapdev), 330 MMUMETHOD(mmu_kextract, moea64_kextract), 331 MMUMETHOD(mmu_kenter, moea64_kenter), 332 MMUMETHOD(mmu_kenter_attr, moea64_kenter_attr), 333 MMUMETHOD(mmu_dev_direct_mapped,moea64_dev_direct_mapped), 334 MMUMETHOD(mmu_scan_init, moea64_scan_init), 335 MMUMETHOD(mmu_dumpsys_map, moea64_dumpsys_map), 336 337 { 0, 0 } 338}; 339 340MMU_DEF(oea64_mmu, "mmu_oea64_base", moea64_methods, 0); 341 342static struct pvo_head * 343vm_page_to_pvoh(vm_page_t m) 344{ 345 346 mtx_assert(PV_LOCKPTR(VM_PAGE_TO_PHYS(m)), MA_OWNED); 347 return (&m->md.mdpg_pvoh); 348} 349 350static struct pvo_entry * 351alloc_pvo_entry(int bootstrap) 352{ 353 struct pvo_entry *pvo; 354 355 if (!moea64_initialized || bootstrap) { 356 if (moea64_bpvo_pool_index >= moea64_bpvo_pool_size) { 357 panic("moea64_enter: bpvo pool exhausted, %d, %d, %zd", 358 moea64_bpvo_pool_index, moea64_bpvo_pool_size, 359 moea64_bpvo_pool_size * sizeof(struct pvo_entry)); 360 } 361 pvo = &moea64_bpvo_pool[ 362 atomic_fetchadd_int(&moea64_bpvo_pool_index, 1)]; 363 bzero(pvo, sizeof(*pvo)); 364 pvo->pvo_vaddr = PVO_BOOTSTRAP; 365 } else { 366 pvo = uma_zalloc(moea64_pvo_zone, M_NOWAIT); 367 bzero(pvo, sizeof(*pvo)); 368 } 369 370 return (pvo); 371} 372 373 374static void 375init_pvo_entry(struct pvo_entry *pvo, pmap_t pmap, vm_offset_t va) 376{ 377 uint64_t vsid; 378 uint64_t hash; 379 int shift; 380 381 PMAP_LOCK_ASSERT(pmap, MA_OWNED); 382 383 pvo->pvo_pmap = pmap; 384 va &= ~ADDR_POFF; 385 pvo->pvo_vaddr |= va; 386 vsid = va_to_vsid(pmap, va); 387 pvo->pvo_vpn = (uint64_t)((va & ADDR_PIDX) >> ADDR_PIDX_SHFT) 388 | (vsid << 16); 389 390 shift = (pvo->pvo_vaddr & PVO_LARGE) ? moea64_large_page_shift : 391 ADDR_PIDX_SHFT; 392 hash = (vsid & VSID_HASH_MASK) ^ (((uint64_t)va & ADDR_PIDX) >> shift); 393 pvo->pvo_pte.slot = (hash & moea64_pteg_mask) << 3; 394} 395 396static void 397free_pvo_entry(struct pvo_entry *pvo) 398{ 399 400 if (!(pvo->pvo_vaddr & PVO_BOOTSTRAP)) 401 uma_zfree(moea64_pvo_zone, pvo); 402} 403 404void 405moea64_pte_from_pvo(const struct pvo_entry *pvo, struct lpte *lpte) 406{ 407 408 lpte->pte_hi = (pvo->pvo_vpn >> (ADDR_API_SHFT64 - ADDR_PIDX_SHFT)) & 409 LPTE_AVPN_MASK; 410 lpte->pte_hi |= LPTE_VALID; 411 412 if (pvo->pvo_vaddr & PVO_LARGE) 413 lpte->pte_hi |= LPTE_BIG; 414 if (pvo->pvo_vaddr & PVO_WIRED) 415 lpte->pte_hi |= LPTE_WIRED; 416 if (pvo->pvo_vaddr & PVO_HID) 417 lpte->pte_hi |= LPTE_HID; 418 419 lpte->pte_lo = pvo->pvo_pte.pa; /* Includes WIMG bits */ 420 if (pvo->pvo_pte.prot & VM_PROT_WRITE) 421 lpte->pte_lo |= LPTE_BW; 422 else 423 lpte->pte_lo |= LPTE_BR; 424 425 if (!(pvo->pvo_pte.prot & VM_PROT_EXECUTE)) 426 lpte->pte_lo |= LPTE_NOEXEC; 427} 428 429static __inline uint64_t 430moea64_calc_wimg(vm_paddr_t pa, vm_memattr_t ma) 431{ 432 uint64_t pte_lo; 433 int i; 434 435 if (ma != VM_MEMATTR_DEFAULT) { 436 switch (ma) { 437 case VM_MEMATTR_UNCACHEABLE: 438 return (LPTE_I | LPTE_G); 439 case VM_MEMATTR_CACHEABLE: 440 return (LPTE_M); 441 case VM_MEMATTR_WRITE_COMBINING: 442 case VM_MEMATTR_WRITE_BACK: 443 case VM_MEMATTR_PREFETCHABLE: 444 return (LPTE_I); 445 case VM_MEMATTR_WRITE_THROUGH: 446 return (LPTE_W | LPTE_M); 447 } 448 } 449 450 /* 451 * Assume the page is cache inhibited and access is guarded unless 452 * it's in our available memory array. 453 */ 454 pte_lo = LPTE_I | LPTE_G; 455 for (i = 0; i < pregions_sz; i++) { 456 if ((pa >= pregions[i].mr_start) && 457 (pa < (pregions[i].mr_start + pregions[i].mr_size))) { 458 pte_lo &= ~(LPTE_I | LPTE_G); 459 pte_lo |= LPTE_M; 460 break; 461 } 462 } 463 464 return pte_lo; 465} 466 467/* 468 * Quick sort callout for comparing memory regions. 469 */ 470static int om_cmp(const void *a, const void *b); 471 472static int 473om_cmp(const void *a, const void *b) 474{ 475 const struct ofw_map *mapa; 476 const struct ofw_map *mapb; 477 478 mapa = a; 479 mapb = b; 480 if (mapa->om_pa < mapb->om_pa) 481 return (-1); 482 else if (mapa->om_pa > mapb->om_pa) 483 return (1); 484 else 485 return (0); 486} 487 488static void 489moea64_add_ofw_mappings(mmu_t mmup, phandle_t mmu, size_t sz) 490{ 491 struct ofw_map translations[sz/(4*sizeof(cell_t))]; /*>= 4 cells per */ 492 pcell_t acells, trans_cells[sz/sizeof(cell_t)]; 493 struct pvo_entry *pvo; 494 register_t msr; 495 vm_offset_t off; 496 vm_paddr_t pa_base; 497 int i, j; 498 499 bzero(translations, sz); 500 OF_getencprop(OF_finddevice("/"), "#address-cells", &acells, 501 sizeof(acells)); 502 if (OF_getencprop(mmu, "translations", trans_cells, sz) == -1) 503 panic("moea64_bootstrap: can't get ofw translations"); 504 505 CTR0(KTR_PMAP, "moea64_add_ofw_mappings: translations"); 506 sz /= sizeof(cell_t); 507 for (i = 0, j = 0; i < sz; j++) { 508 translations[j].om_va = trans_cells[i++]; 509 translations[j].om_len = trans_cells[i++]; 510 translations[j].om_pa = trans_cells[i++]; 511 if (acells == 2) { 512 translations[j].om_pa <<= 32; 513 translations[j].om_pa |= trans_cells[i++]; 514 } 515 translations[j].om_mode = trans_cells[i++]; 516 } 517 KASSERT(i == sz, ("Translations map has incorrect cell count (%d/%zd)", 518 i, sz)); 519 520 sz = j; 521 qsort(translations, sz, sizeof (*translations), om_cmp); 522 523 for (i = 0; i < sz; i++) { 524 pa_base = translations[i].om_pa; 525 #ifndef __powerpc64__ 526 if ((translations[i].om_pa >> 32) != 0) 527 panic("OFW translations above 32-bit boundary!"); 528 #endif 529 530 if (pa_base % PAGE_SIZE) 531 panic("OFW translation not page-aligned (phys)!"); 532 if (translations[i].om_va % PAGE_SIZE) 533 panic("OFW translation not page-aligned (virt)!"); 534 535 CTR3(KTR_PMAP, "translation: pa=%#zx va=%#x len=%#x", 536 pa_base, translations[i].om_va, translations[i].om_len); 537 538 /* Now enter the pages for this mapping */ 539 540 DISABLE_TRANS(msr); 541 for (off = 0; off < translations[i].om_len; off += PAGE_SIZE) { 542 /* If this address is direct-mapped, skip remapping */ 543 if (hw_direct_map && translations[i].om_va == pa_base && 544 moea64_calc_wimg(pa_base + off, VM_MEMATTR_DEFAULT) == LPTE_M) 545 continue; 546 547 PMAP_LOCK(kernel_pmap); 548 pvo = moea64_pvo_find_va(kernel_pmap, 549 translations[i].om_va + off); 550 PMAP_UNLOCK(kernel_pmap); 551 if (pvo != NULL) 552 continue; 553 554 moea64_kenter(mmup, translations[i].om_va + off, 555 pa_base + off); 556 } 557 ENABLE_TRANS(msr); 558 } 559} 560 561#ifdef __powerpc64__ 562static void 563moea64_probe_large_page(void) 564{ 565 uint16_t pvr = mfpvr() >> 16; 566 567 switch (pvr) { 568 case IBM970: 569 case IBM970FX: 570 case IBM970MP: 571 powerpc_sync(); isync(); 572 mtspr(SPR_HID4, mfspr(SPR_HID4) & ~HID4_970_DISABLE_LG_PG); 573 powerpc_sync(); isync(); 574 575 /* FALLTHROUGH */ 576 default: 577 moea64_large_page_size = 0x1000000; /* 16 MB */ 578 moea64_large_page_shift = 24; 579 } 580 581 moea64_large_page_mask = moea64_large_page_size - 1; 582} 583 584static void 585moea64_bootstrap_slb_prefault(vm_offset_t va, int large) 586{ 587 struct slb *cache; 588 struct slb entry; 589 uint64_t esid, slbe; 590 uint64_t i; 591 592 cache = PCPU_GET(slb); 593 esid = va >> ADDR_SR_SHFT; 594 slbe = (esid << SLBE_ESID_SHIFT) | SLBE_VALID; 595 596 for (i = 0; i < 64; i++) { 597 if (cache[i].slbe == (slbe | i)) 598 return; 599 } 600 601 entry.slbe = slbe; 602 entry.slbv = KERNEL_VSID(esid) << SLBV_VSID_SHIFT; 603 if (large) 604 entry.slbv |= SLBV_L; 605 606 slb_insert_kernel(entry.slbe, entry.slbv); 607} 608#endif 609 610static void 611moea64_setup_direct_map(mmu_t mmup, vm_offset_t kernelstart, 612 vm_offset_t kernelend) 613{ 614 struct pvo_entry *pvo; 615 register_t msr; 616 vm_paddr_t pa; 617 vm_offset_t size, off; 618 uint64_t pte_lo; 619 int i; 620 621 if (moea64_large_page_size == 0) 622 hw_direct_map = 0; 623 624 DISABLE_TRANS(msr); 625 if (hw_direct_map) { 626 PMAP_LOCK(kernel_pmap); 627 for (i = 0; i < pregions_sz; i++) { 628 for (pa = pregions[i].mr_start; pa < pregions[i].mr_start + 629 pregions[i].mr_size; pa += moea64_large_page_size) { 630 pte_lo = LPTE_M; 631 632 pvo = alloc_pvo_entry(1 /* bootstrap */); 633 pvo->pvo_vaddr |= PVO_WIRED | PVO_LARGE; 634 init_pvo_entry(pvo, kernel_pmap, pa); 635 636 /* 637 * Set memory access as guarded if prefetch within 638 * the page could exit the available physmem area. 639 */ 640 if (pa & moea64_large_page_mask) { 641 pa &= moea64_large_page_mask; 642 pte_lo |= LPTE_G; 643 } 644 if (pa + moea64_large_page_size > 645 pregions[i].mr_start + pregions[i].mr_size) 646 pte_lo |= LPTE_G; 647 648 pvo->pvo_pte.prot = VM_PROT_READ | VM_PROT_WRITE | 649 VM_PROT_EXECUTE; 650 pvo->pvo_pte.pa = pa | pte_lo; 651 moea64_pvo_enter(mmup, pvo, NULL); 652 } 653 } 654 PMAP_UNLOCK(kernel_pmap); 655 } else { 656 size = moea64_bpvo_pool_size*sizeof(struct pvo_entry); 657 off = (vm_offset_t)(moea64_bpvo_pool); 658 for (pa = off; pa < off + size; pa += PAGE_SIZE) 659 moea64_kenter(mmup, pa, pa); 660 661 /* 662 * Map certain important things, like ourselves. 663 * 664 * NOTE: We do not map the exception vector space. That code is 665 * used only in real mode, and leaving it unmapped allows us to 666 * catch NULL pointer deferences, instead of making NULL a valid 667 * address. 668 */ 669 670 for (pa = kernelstart & ~PAGE_MASK; pa < kernelend; 671 pa += PAGE_SIZE) 672 moea64_kenter(mmup, pa, pa); 673 } 674 ENABLE_TRANS(msr); 675 676 /* 677 * Allow user to override unmapped_buf_allowed for testing. 678 * XXXKIB Only direct map implementation was tested. 679 */ 680 if (!TUNABLE_INT_FETCH("vfs.unmapped_buf_allowed", 681 &unmapped_buf_allowed)) 682 unmapped_buf_allowed = hw_direct_map; 683} 684 685void 686moea64_early_bootstrap(mmu_t mmup, vm_offset_t kernelstart, vm_offset_t kernelend) 687{ 688 int i, j; 689 vm_size_t physsz, hwphyssz; 690 691#ifndef __powerpc64__ 692 /* We don't have a direct map since there is no BAT */ 693 hw_direct_map = 0; 694 695 /* Make sure battable is zero, since we have no BAT */ 696 for (i = 0; i < 16; i++) { 697 battable[i].batu = 0; 698 battable[i].batl = 0; 699 } 700#else 701 moea64_probe_large_page(); 702 703 /* Use a direct map if we have large page support */ 704 if (moea64_large_page_size > 0) 705 hw_direct_map = 1; 706 else 707 hw_direct_map = 0; 708#endif 709 710 /* Get physical memory regions from firmware */ 711 mem_regions(&pregions, &pregions_sz, ®ions, ®ions_sz); 712 CTR0(KTR_PMAP, "moea64_bootstrap: physical memory"); 713 714 if (sizeof(phys_avail)/sizeof(phys_avail[0]) < regions_sz) 715 panic("moea64_bootstrap: phys_avail too small"); 716 717 phys_avail_count = 0; 718 physsz = 0; 719 hwphyssz = 0; 720 TUNABLE_ULONG_FETCH("hw.physmem", (u_long *) &hwphyssz); 721 for (i = 0, j = 0; i < regions_sz; i++, j += 2) { 722 CTR3(KTR_PMAP, "region: %#zx - %#zx (%#zx)", 723 regions[i].mr_start, regions[i].mr_start + 724 regions[i].mr_size, regions[i].mr_size); 725 if (hwphyssz != 0 && 726 (physsz + regions[i].mr_size) >= hwphyssz) { 727 if (physsz < hwphyssz) { 728 phys_avail[j] = regions[i].mr_start; 729 phys_avail[j + 1] = regions[i].mr_start + 730 hwphyssz - physsz; 731 physsz = hwphyssz; 732 phys_avail_count++; 733 } 734 break; 735 } 736 phys_avail[j] = regions[i].mr_start; 737 phys_avail[j + 1] = regions[i].mr_start + regions[i].mr_size; 738 phys_avail_count++; 739 physsz += regions[i].mr_size; 740 } 741 742 /* Check for overlap with the kernel and exception vectors */ 743 for (j = 0; j < 2*phys_avail_count; j+=2) { 744 if (phys_avail[j] < EXC_LAST) 745 phys_avail[j] += EXC_LAST; 746 747 if (kernelstart >= phys_avail[j] && 748 kernelstart < phys_avail[j+1]) { 749 if (kernelend < phys_avail[j+1]) { 750 phys_avail[2*phys_avail_count] = 751 (kernelend & ~PAGE_MASK) + PAGE_SIZE; 752 phys_avail[2*phys_avail_count + 1] = 753 phys_avail[j+1]; 754 phys_avail_count++; 755 } 756 757 phys_avail[j+1] = kernelstart & ~PAGE_MASK; 758 } 759 760 if (kernelend >= phys_avail[j] && 761 kernelend < phys_avail[j+1]) { 762 if (kernelstart > phys_avail[j]) { 763 phys_avail[2*phys_avail_count] = phys_avail[j]; 764 phys_avail[2*phys_avail_count + 1] = 765 kernelstart & ~PAGE_MASK; 766 phys_avail_count++; 767 } 768 769 phys_avail[j] = (kernelend & ~PAGE_MASK) + PAGE_SIZE; 770 } 771 } 772 773 physmem = btoc(physsz); 774 775#ifdef PTEGCOUNT 776 moea64_pteg_count = PTEGCOUNT; 777#else 778 moea64_pteg_count = 0x1000; 779 780 while (moea64_pteg_count < physmem) 781 moea64_pteg_count <<= 1; 782 783 moea64_pteg_count >>= 1; 784#endif /* PTEGCOUNT */ 785} 786 787void 788moea64_mid_bootstrap(mmu_t mmup, vm_offset_t kernelstart, vm_offset_t kernelend) 789{ 790 int i; 791 792 /* 793 * Set PTEG mask 794 */ 795 moea64_pteg_mask = moea64_pteg_count - 1; 796 797 /* 798 * Initialize SLB table lock and page locks 799 */ 800 mtx_init(&moea64_slb_mutex, "SLB table", NULL, MTX_DEF); 801 for (i = 0; i < PV_LOCK_COUNT; i++) 802 mtx_init(&pv_lock[i], "page pv", NULL, MTX_DEF); 803 804 /* 805 * Initialise the bootstrap pvo pool. 806 */ 807 moea64_bpvo_pool = (struct pvo_entry *)moea64_bootstrap_alloc( 808 moea64_bpvo_pool_size*sizeof(struct pvo_entry), 0); 809 moea64_bpvo_pool_index = 0; 810 811 /* 812 * Make sure kernel vsid is allocated as well as VSID 0. 813 */ 814 #ifndef __powerpc64__ 815 moea64_vsid_bitmap[(KERNEL_VSIDBITS & (NVSIDS - 1)) / VSID_NBPW] 816 |= 1 << (KERNEL_VSIDBITS % VSID_NBPW); 817 moea64_vsid_bitmap[0] |= 1; 818 #endif 819 820 /* 821 * Initialize the kernel pmap (which is statically allocated). 822 */ 823 #ifdef __powerpc64__ 824 for (i = 0; i < 64; i++) { 825 pcpup->pc_slb[i].slbv = 0; 826 pcpup->pc_slb[i].slbe = 0; 827 } 828 #else 829 for (i = 0; i < 16; i++) 830 kernel_pmap->pm_sr[i] = EMPTY_SEGMENT + i; 831 #endif 832 833 kernel_pmap->pmap_phys = kernel_pmap; 834 CPU_FILL(&kernel_pmap->pm_active); 835 RB_INIT(&kernel_pmap->pmap_pvo); 836 837 PMAP_LOCK_INIT(kernel_pmap); 838 839 /* 840 * Now map in all the other buffers we allocated earlier 841 */ 842 843 moea64_setup_direct_map(mmup, kernelstart, kernelend); 844} 845 846void 847moea64_late_bootstrap(mmu_t mmup, vm_offset_t kernelstart, vm_offset_t kernelend) 848{ 849 ihandle_t mmui; 850 phandle_t chosen; 851 phandle_t mmu; 852 ssize_t sz; 853 int i; 854 vm_offset_t pa, va; 855 void *dpcpu; 856 857 /* 858 * Set up the Open Firmware pmap and add its mappings if not in real 859 * mode. 860 */ 861 862 chosen = OF_finddevice("/chosen"); 863 if (chosen != -1 && OF_getencprop(chosen, "mmu", &mmui, 4) != -1) { 864 mmu = OF_instance_to_package(mmui); 865 if (mmu == -1 || 866 (sz = OF_getproplen(mmu, "translations")) == -1) 867 sz = 0; 868 if (sz > 6144 /* tmpstksz - 2 KB headroom */) 869 panic("moea64_bootstrap: too many ofw translations"); 870 871 if (sz > 0) 872 moea64_add_ofw_mappings(mmup, mmu, sz); 873 } 874 875 /* 876 * Calculate the last available physical address. 877 */ 878 for (i = 0; phys_avail[i + 2] != 0; i += 2) 879 ; 880 Maxmem = powerpc_btop(phys_avail[i + 1]); 881 882 /* 883 * Initialize MMU and remap early physical mappings 884 */ 885 MMU_CPU_BOOTSTRAP(mmup,0); 886 mtmsr(mfmsr() | PSL_DR | PSL_IR); 887 pmap_bootstrapped++; 888 bs_remap_earlyboot(); 889 890 /* 891 * Set the start and end of kva. 892 */ 893 virtual_avail = VM_MIN_KERNEL_ADDRESS; 894 virtual_end = VM_MAX_SAFE_KERNEL_ADDRESS; 895 896 /* 897 * Map the entire KVA range into the SLB. We must not fault there. 898 */ 899 #ifdef __powerpc64__ 900 for (va = virtual_avail; va < virtual_end; va += SEGMENT_LENGTH) 901 moea64_bootstrap_slb_prefault(va, 0); 902 #endif 903 904 /* 905 * Figure out how far we can extend virtual_end into segment 16 906 * without running into existing mappings. Segment 16 is guaranteed 907 * to contain neither RAM nor devices (at least on Apple hardware), 908 * but will generally contain some OFW mappings we should not 909 * step on. 910 */ 911 912 #ifndef __powerpc64__ /* KVA is in high memory on PPC64 */ 913 PMAP_LOCK(kernel_pmap); 914 while (virtual_end < VM_MAX_KERNEL_ADDRESS && 915 moea64_pvo_find_va(kernel_pmap, virtual_end+1) == NULL) 916 virtual_end += PAGE_SIZE; 917 PMAP_UNLOCK(kernel_pmap); 918 #endif 919 920 /* 921 * Allocate a kernel stack with a guard page for thread0 and map it 922 * into the kernel page map. 923 */ 924 pa = moea64_bootstrap_alloc(kstack_pages * PAGE_SIZE, PAGE_SIZE); 925 va = virtual_avail + KSTACK_GUARD_PAGES * PAGE_SIZE; 926 virtual_avail = va + kstack_pages * PAGE_SIZE; 927 CTR2(KTR_PMAP, "moea64_bootstrap: kstack0 at %#x (%#x)", pa, va); 928 thread0.td_kstack = va; 929 thread0.td_kstack_pages = kstack_pages; 930 for (i = 0; i < kstack_pages; i++) { 931 moea64_kenter(mmup, va, pa); 932 pa += PAGE_SIZE; 933 va += PAGE_SIZE; 934 } 935 936 /* 937 * Allocate virtual address space for the message buffer. 938 */ 939 pa = msgbuf_phys = moea64_bootstrap_alloc(msgbufsize, PAGE_SIZE); 940 msgbufp = (struct msgbuf *)virtual_avail; 941 va = virtual_avail; 942 virtual_avail += round_page(msgbufsize); 943 while (va < virtual_avail) { 944 moea64_kenter(mmup, va, pa); 945 pa += PAGE_SIZE; 946 va += PAGE_SIZE; 947 } 948 949 /* 950 * Allocate virtual address space for the dynamic percpu area. 951 */ 952 pa = moea64_bootstrap_alloc(DPCPU_SIZE, PAGE_SIZE); 953 dpcpu = (void *)virtual_avail; 954 va = virtual_avail; 955 virtual_avail += DPCPU_SIZE; 956 while (va < virtual_avail) { 957 moea64_kenter(mmup, va, pa); 958 pa += PAGE_SIZE; 959 va += PAGE_SIZE; 960 } 961 dpcpu_init(dpcpu, 0); 962 963 /* 964 * Allocate some things for page zeroing. We put this directly 965 * in the page table and use MOEA64_PTE_REPLACE to avoid any 966 * of the PVO book-keeping or other parts of the VM system 967 * from even knowing that this hack exists. 968 */ 969 970 if (!hw_direct_map) { 971 mtx_init(&moea64_scratchpage_mtx, "pvo zero page", NULL, 972 MTX_DEF); 973 for (i = 0; i < 2; i++) { 974 moea64_scratchpage_va[i] = (virtual_end+1) - PAGE_SIZE; 975 virtual_end -= PAGE_SIZE; 976 977 moea64_kenter(mmup, moea64_scratchpage_va[i], 0); 978 979 PMAP_LOCK(kernel_pmap); 980 moea64_scratchpage_pvo[i] = moea64_pvo_find_va( 981 kernel_pmap, (vm_offset_t)moea64_scratchpage_va[i]); 982 PMAP_UNLOCK(kernel_pmap); 983 } 984 } 985} 986 987static void 988moea64_pmap_init_qpages(void) 989{ 990 struct pcpu *pc; 991 int i; 992 993 if (hw_direct_map) 994 return; 995 996 CPU_FOREACH(i) { 997 pc = pcpu_find(i); 998 pc->pc_qmap_addr = kva_alloc(PAGE_SIZE); 999 if (pc->pc_qmap_addr == 0) 1000 panic("pmap_init_qpages: unable to allocate KVA"); 1001 PMAP_LOCK(kernel_pmap); 1002 pc->pc_qmap_pvo = moea64_pvo_find_va(kernel_pmap, pc->pc_qmap_addr); 1003 PMAP_UNLOCK(kernel_pmap); 1004 mtx_init(&pc->pc_qmap_lock, "qmap lock", NULL, MTX_DEF); 1005 } 1006} 1007 1008SYSINIT(qpages_init, SI_SUB_CPU, SI_ORDER_ANY, moea64_pmap_init_qpages, NULL); 1009 1010/* 1011 * Activate a user pmap. This mostly involves setting some non-CPU 1012 * state. 1013 */ 1014void 1015moea64_activate(mmu_t mmu, struct thread *td) 1016{ 1017 pmap_t pm; 1018 1019 pm = &td->td_proc->p_vmspace->vm_pmap; 1020 CPU_SET(PCPU_GET(cpuid), &pm->pm_active); 1021 1022 #ifdef __powerpc64__ 1023 PCPU_SET(userslb, pm->pm_slb); 1024 __asm __volatile("slbmte %0, %1; isync" :: 1025 "r"(td->td_pcb->pcb_cpu.aim.usr_vsid), "r"(USER_SLB_SLBE)); 1026 #else 1027 PCPU_SET(curpmap, pm->pmap_phys); 1028 mtsrin(USER_SR << ADDR_SR_SHFT, td->td_pcb->pcb_cpu.aim.usr_vsid); 1029 #endif 1030} 1031 1032void 1033moea64_deactivate(mmu_t mmu, struct thread *td) 1034{ 1035 pmap_t pm; 1036 1037 __asm __volatile("isync; slbie %0" :: "r"(USER_ADDR)); 1038 1039 pm = &td->td_proc->p_vmspace->vm_pmap; 1040 CPU_CLR(PCPU_GET(cpuid), &pm->pm_active); 1041 #ifdef __powerpc64__ 1042 PCPU_SET(userslb, NULL); 1043 #else 1044 PCPU_SET(curpmap, NULL); 1045 #endif 1046} 1047 1048void 1049moea64_unwire(mmu_t mmu, pmap_t pm, vm_offset_t sva, vm_offset_t eva) 1050{ 1051 struct pvo_entry key, *pvo; 1052 vm_page_t m; 1053 int64_t refchg; 1054 1055 key.pvo_vaddr = sva; 1056 PMAP_LOCK(pm); 1057 for (pvo = RB_NFIND(pvo_tree, &pm->pmap_pvo, &key); 1058 pvo != NULL && PVO_VADDR(pvo) < eva; 1059 pvo = RB_NEXT(pvo_tree, &pm->pmap_pvo, pvo)) { 1060 if ((pvo->pvo_vaddr & PVO_WIRED) == 0) 1061 panic("moea64_unwire: pvo %p is missing PVO_WIRED", 1062 pvo); 1063 pvo->pvo_vaddr &= ~PVO_WIRED; 1064 refchg = MOEA64_PTE_REPLACE(mmu, pvo, 0 /* No invalidation */); 1065 if ((pvo->pvo_vaddr & PVO_MANAGED) && 1066 (pvo->pvo_pte.prot & VM_PROT_WRITE)) { 1067 if (refchg < 0) 1068 refchg = LPTE_CHG; 1069 m = PHYS_TO_VM_PAGE(pvo->pvo_pte.pa & LPTE_RPGN); 1070 1071 refchg |= atomic_readandclear_32(&m->md.mdpg_attrs); 1072 if (refchg & LPTE_CHG) 1073 vm_page_dirty(m); 1074 if (refchg & LPTE_REF) 1075 vm_page_aflag_set(m, PGA_REFERENCED); 1076 } 1077 pm->pm_stats.wired_count--; 1078 } 1079 PMAP_UNLOCK(pm); 1080} 1081 1082/* 1083 * This goes through and sets the physical address of our 1084 * special scratch PTE to the PA we want to zero or copy. Because 1085 * of locking issues (this can get called in pvo_enter() by 1086 * the UMA allocator), we can't use most other utility functions here 1087 */ 1088 1089static __inline 1090void moea64_set_scratchpage_pa(mmu_t mmup, int which, vm_paddr_t pa) { 1091 1092 KASSERT(!hw_direct_map, ("Using OEA64 scratchpage with a direct map!")); 1093 mtx_assert(&moea64_scratchpage_mtx, MA_OWNED); 1094 1095 moea64_scratchpage_pvo[which]->pvo_pte.pa = 1096 moea64_calc_wimg(pa, VM_MEMATTR_DEFAULT) | (uint64_t)pa; 1097 MOEA64_PTE_REPLACE(mmup, moea64_scratchpage_pvo[which], 1098 MOEA64_PTE_INVALIDATE); 1099 isync(); 1100} 1101 1102void 1103moea64_copy_page(mmu_t mmu, vm_page_t msrc, vm_page_t mdst) 1104{ 1105 vm_offset_t dst; 1106 vm_offset_t src; 1107 1108 dst = VM_PAGE_TO_PHYS(mdst); 1109 src = VM_PAGE_TO_PHYS(msrc); 1110 1111 if (hw_direct_map) { 1112 bcopy((void *)src, (void *)dst, PAGE_SIZE); 1113 } else { 1114 mtx_lock(&moea64_scratchpage_mtx); 1115 1116 moea64_set_scratchpage_pa(mmu, 0, src); 1117 moea64_set_scratchpage_pa(mmu, 1, dst); 1118 1119 bcopy((void *)moea64_scratchpage_va[0], 1120 (void *)moea64_scratchpage_va[1], PAGE_SIZE); 1121 1122 mtx_unlock(&moea64_scratchpage_mtx); 1123 } 1124} 1125 1126static inline void 1127moea64_copy_pages_dmap(mmu_t mmu, vm_page_t *ma, vm_offset_t a_offset, 1128 vm_page_t *mb, vm_offset_t b_offset, int xfersize) 1129{ 1130 void *a_cp, *b_cp; 1131 vm_offset_t a_pg_offset, b_pg_offset; 1132 int cnt; 1133 1134 while (xfersize > 0) { 1135 a_pg_offset = a_offset & PAGE_MASK; 1136 cnt = min(xfersize, PAGE_SIZE - a_pg_offset); 1137 a_cp = (char *)VM_PAGE_TO_PHYS(ma[a_offset >> PAGE_SHIFT]) + 1138 a_pg_offset; 1139 b_pg_offset = b_offset & PAGE_MASK; 1140 cnt = min(cnt, PAGE_SIZE - b_pg_offset); 1141 b_cp = (char *)VM_PAGE_TO_PHYS(mb[b_offset >> PAGE_SHIFT]) + 1142 b_pg_offset; 1143 bcopy(a_cp, b_cp, cnt); 1144 a_offset += cnt; 1145 b_offset += cnt; 1146 xfersize -= cnt; 1147 } 1148} 1149 1150static inline void 1151moea64_copy_pages_nodmap(mmu_t mmu, vm_page_t *ma, vm_offset_t a_offset, 1152 vm_page_t *mb, vm_offset_t b_offset, int xfersize) 1153{ 1154 void *a_cp, *b_cp; 1155 vm_offset_t a_pg_offset, b_pg_offset; 1156 int cnt; 1157 1158 mtx_lock(&moea64_scratchpage_mtx); 1159 while (xfersize > 0) { 1160 a_pg_offset = a_offset & PAGE_MASK; 1161 cnt = min(xfersize, PAGE_SIZE - a_pg_offset); 1162 moea64_set_scratchpage_pa(mmu, 0, 1163 VM_PAGE_TO_PHYS(ma[a_offset >> PAGE_SHIFT])); 1164 a_cp = (char *)moea64_scratchpage_va[0] + a_pg_offset; 1165 b_pg_offset = b_offset & PAGE_MASK; 1166 cnt = min(cnt, PAGE_SIZE - b_pg_offset); 1167 moea64_set_scratchpage_pa(mmu, 1, 1168 VM_PAGE_TO_PHYS(mb[b_offset >> PAGE_SHIFT])); 1169 b_cp = (char *)moea64_scratchpage_va[1] + b_pg_offset; 1170 bcopy(a_cp, b_cp, cnt); 1171 a_offset += cnt; 1172 b_offset += cnt; 1173 xfersize -= cnt; 1174 } 1175 mtx_unlock(&moea64_scratchpage_mtx); 1176} 1177 1178void 1179moea64_copy_pages(mmu_t mmu, vm_page_t *ma, vm_offset_t a_offset, 1180 vm_page_t *mb, vm_offset_t b_offset, int xfersize) 1181{ 1182 1183 if (hw_direct_map) { 1184 moea64_copy_pages_dmap(mmu, ma, a_offset, mb, b_offset, 1185 xfersize); 1186 } else { 1187 moea64_copy_pages_nodmap(mmu, ma, a_offset, mb, b_offset, 1188 xfersize); 1189 } 1190} 1191 1192void 1193moea64_zero_page_area(mmu_t mmu, vm_page_t m, int off, int size) 1194{ 1195 vm_paddr_t pa = VM_PAGE_TO_PHYS(m); 1196 1197 if (size + off > PAGE_SIZE) 1198 panic("moea64_zero_page: size + off > PAGE_SIZE"); 1199 1200 if (hw_direct_map) { 1201 bzero((caddr_t)pa + off, size); 1202 } else { 1203 mtx_lock(&moea64_scratchpage_mtx); 1204 moea64_set_scratchpage_pa(mmu, 0, pa); 1205 bzero((caddr_t)moea64_scratchpage_va[0] + off, size); 1206 mtx_unlock(&moea64_scratchpage_mtx); 1207 } 1208} 1209 1210/* 1211 * Zero a page of physical memory by temporarily mapping it 1212 */ 1213void 1214moea64_zero_page(mmu_t mmu, vm_page_t m) 1215{ 1216 vm_paddr_t pa = VM_PAGE_TO_PHYS(m); 1217 vm_offset_t va, off; 1218 1219 if (!hw_direct_map) { 1220 mtx_lock(&moea64_scratchpage_mtx); 1221 1222 moea64_set_scratchpage_pa(mmu, 0, pa); 1223 va = moea64_scratchpage_va[0]; 1224 } else { 1225 va = pa; 1226 } 1227 1228 for (off = 0; off < PAGE_SIZE; off += cacheline_size) 1229 __asm __volatile("dcbz 0,%0" :: "r"(va + off)); 1230 1231 if (!hw_direct_map) 1232 mtx_unlock(&moea64_scratchpage_mtx); 1233} 1234 1235void 1236moea64_zero_page_idle(mmu_t mmu, vm_page_t m) 1237{ 1238 1239 moea64_zero_page(mmu, m); 1240} 1241 1242vm_offset_t 1243moea64_quick_enter_page(mmu_t mmu, vm_page_t m) 1244{ 1245 struct pvo_entry *pvo; 1246 vm_paddr_t pa = VM_PAGE_TO_PHYS(m); 1247 1248 if (hw_direct_map) 1249 return (pa); 1250 1251 /* 1252 * MOEA64_PTE_REPLACE does some locking, so we can't just grab 1253 * a critical section and access the PCPU data like on i386. 1254 * Instead, pin the thread and grab the PCPU lock to prevent 1255 * a preempting thread from using the same PCPU data. 1256 */ 1257 sched_pin(); 1258 1259 mtx_assert(PCPU_PTR(qmap_lock), MA_NOTOWNED); 1260 pvo = PCPU_GET(qmap_pvo); 1261 1262 mtx_lock(PCPU_PTR(qmap_lock)); 1263 pvo->pvo_pte.pa = moea64_calc_wimg(pa, pmap_page_get_memattr(m)) | 1264 (uint64_t)pa; 1265 MOEA64_PTE_REPLACE(mmu, pvo, MOEA64_PTE_INVALIDATE); 1266 isync(); 1267 1268 return (PCPU_GET(qmap_addr)); 1269} 1270 1271void 1272moea64_quick_remove_page(mmu_t mmu, vm_offset_t addr) 1273{ 1274 if (hw_direct_map) 1275 return; 1276 1277 mtx_assert(PCPU_PTR(qmap_lock), MA_OWNED); 1278 KASSERT(PCPU_GET(qmap_addr) == addr, 1279 ("moea64_quick_remove_page: invalid address")); 1280 mtx_unlock(PCPU_PTR(qmap_lock)); 1281 sched_unpin(); 1282} 1283 1284/* 1285 * Map the given physical page at the specified virtual address in the 1286 * target pmap with the protection requested. If specified the page 1287 * will be wired down. 1288 */ 1289 1290int 1291moea64_enter(mmu_t mmu, pmap_t pmap, vm_offset_t va, vm_page_t m, 1292 vm_prot_t prot, u_int flags, int8_t psind) 1293{ 1294 struct pvo_entry *pvo, *oldpvo; 1295 struct pvo_head *pvo_head; 1296 uint64_t pte_lo; 1297 int error; 1298 1299 if ((m->oflags & VPO_UNMANAGED) == 0 && !vm_page_xbusied(m)) 1300 VM_OBJECT_ASSERT_LOCKED(m->object); 1301 1302 pvo = alloc_pvo_entry(0); 1303 pvo->pvo_pmap = NULL; /* to be filled in later */ 1304 pvo->pvo_pte.prot = prot; 1305 1306 pte_lo = moea64_calc_wimg(VM_PAGE_TO_PHYS(m), pmap_page_get_memattr(m)); 1307 pvo->pvo_pte.pa = VM_PAGE_TO_PHYS(m) | pte_lo; 1308 1309 if ((flags & PMAP_ENTER_WIRED) != 0) 1310 pvo->pvo_vaddr |= PVO_WIRED; 1311 1312 if ((m->oflags & VPO_UNMANAGED) != 0 || !moea64_initialized) { 1313 pvo_head = NULL; 1314 } else { 1315 pvo_head = &m->md.mdpg_pvoh; 1316 pvo->pvo_vaddr |= PVO_MANAGED; 1317 } 1318 1319 for (;;) { 1320 PV_PAGE_LOCK(m); 1321 PMAP_LOCK(pmap); 1322 if (pvo->pvo_pmap == NULL) 1323 init_pvo_entry(pvo, pmap, va); 1324 if (prot & VM_PROT_WRITE) 1325 if (pmap_bootstrapped && 1326 (m->oflags & VPO_UNMANAGED) == 0) 1327 vm_page_aflag_set(m, PGA_WRITEABLE); 1328 1329 oldpvo = moea64_pvo_find_va(pmap, va); 1330 if (oldpvo != NULL) { 1331 if (oldpvo->pvo_vaddr == pvo->pvo_vaddr && 1332 oldpvo->pvo_pte.pa == pvo->pvo_pte.pa && 1333 oldpvo->pvo_pte.prot == prot) { 1334 /* Identical mapping already exists */ 1335 error = 0; 1336 1337 /* If not in page table, reinsert it */ 1338 if (MOEA64_PTE_SYNCH(mmu, oldpvo) < 0) { 1339 moea64_pte_overflow--; 1340 MOEA64_PTE_INSERT(mmu, oldpvo); 1341 } 1342 1343 /* Then just clean up and go home */ 1344 PV_PAGE_UNLOCK(m); 1345 PMAP_UNLOCK(pmap); 1346 free_pvo_entry(pvo); 1347 break; 1348 } 1349 1350 /* Otherwise, need to kill it first */ 1351 KASSERT(oldpvo->pvo_pmap == pmap, ("pmap of old " 1352 "mapping does not match new mapping")); 1353 moea64_pvo_remove_from_pmap(mmu, oldpvo); 1354 } 1355 error = moea64_pvo_enter(mmu, pvo, pvo_head); 1356 PV_PAGE_UNLOCK(m); 1357 PMAP_UNLOCK(pmap); 1358 1359 /* Free any dead pages */ 1360 if (oldpvo != NULL) { 1361 PV_LOCK(oldpvo->pvo_pte.pa & LPTE_RPGN); 1362 moea64_pvo_remove_from_page(mmu, oldpvo); 1363 PV_UNLOCK(oldpvo->pvo_pte.pa & LPTE_RPGN); 1364 free_pvo_entry(oldpvo); 1365 } 1366 1367 if (error != ENOMEM) 1368 break; 1369 if ((flags & PMAP_ENTER_NOSLEEP) != 0) 1370 return (KERN_RESOURCE_SHORTAGE); 1371 VM_OBJECT_ASSERT_UNLOCKED(m->object); 1372 VM_WAIT; 1373 } 1374 1375 /* 1376 * Flush the page from the instruction cache if this page is 1377 * mapped executable and cacheable. 1378 */ 1379 if (pmap != kernel_pmap && !(m->aflags & PGA_EXECUTABLE) && 1380 (pte_lo & (LPTE_I | LPTE_G | LPTE_NOEXEC)) == 0) { 1381 vm_page_aflag_set(m, PGA_EXECUTABLE); 1382 moea64_syncicache(mmu, pmap, va, VM_PAGE_TO_PHYS(m), PAGE_SIZE); 1383 } 1384 return (KERN_SUCCESS); 1385} 1386 1387static void 1388moea64_syncicache(mmu_t mmu, pmap_t pmap, vm_offset_t va, vm_paddr_t pa, 1389 vm_size_t sz) 1390{ 1391 1392 /* 1393 * This is much trickier than on older systems because 1394 * we can't sync the icache on physical addresses directly 1395 * without a direct map. Instead we check a couple of cases 1396 * where the memory is already mapped in and, failing that, 1397 * use the same trick we use for page zeroing to create 1398 * a temporary mapping for this physical address. 1399 */ 1400 1401 if (!pmap_bootstrapped) { 1402 /* 1403 * If PMAP is not bootstrapped, we are likely to be 1404 * in real mode. 1405 */ 1406 __syncicache((void *)pa, sz); 1407 } else if (pmap == kernel_pmap) { 1408 __syncicache((void *)va, sz); 1409 } else if (hw_direct_map) { 1410 __syncicache((void *)pa, sz); 1411 } else { 1412 /* Use the scratch page to set up a temp mapping */ 1413 1414 mtx_lock(&moea64_scratchpage_mtx); 1415 1416 moea64_set_scratchpage_pa(mmu, 1, pa & ~ADDR_POFF); 1417 __syncicache((void *)(moea64_scratchpage_va[1] + 1418 (va & ADDR_POFF)), sz); 1419 1420 mtx_unlock(&moea64_scratchpage_mtx); 1421 } 1422} 1423 1424/* 1425 * Maps a sequence of resident pages belonging to the same object. 1426 * The sequence begins with the given page m_start. This page is 1427 * mapped at the given virtual address start. Each subsequent page is 1428 * mapped at a virtual address that is offset from start by the same 1429 * amount as the page is offset from m_start within the object. The 1430 * last page in the sequence is the page with the largest offset from 1431 * m_start that can be mapped at a virtual address less than the given 1432 * virtual address end. Not every virtual page between start and end 1433 * is mapped; only those for which a resident page exists with the 1434 * corresponding offset from m_start are mapped. 1435 */ 1436void 1437moea64_enter_object(mmu_t mmu, pmap_t pm, vm_offset_t start, vm_offset_t end, 1438 vm_page_t m_start, vm_prot_t prot) 1439{ 1440 vm_page_t m; 1441 vm_pindex_t diff, psize; 1442 1443 VM_OBJECT_ASSERT_LOCKED(m_start->object); 1444 1445 psize = atop(end - start); 1446 m = m_start; 1447 while (m != NULL && (diff = m->pindex - m_start->pindex) < psize) { 1448 moea64_enter(mmu, pm, start + ptoa(diff), m, prot & 1449 (VM_PROT_READ | VM_PROT_EXECUTE), PMAP_ENTER_NOSLEEP, 0); 1450 m = TAILQ_NEXT(m, listq); 1451 } 1452} 1453 1454void 1455moea64_enter_quick(mmu_t mmu, pmap_t pm, vm_offset_t va, vm_page_t m, 1456 vm_prot_t prot) 1457{ 1458 1459 moea64_enter(mmu, pm, va, m, prot & (VM_PROT_READ | VM_PROT_EXECUTE), 1460 PMAP_ENTER_NOSLEEP, 0); 1461} 1462 1463vm_paddr_t 1464moea64_extract(mmu_t mmu, pmap_t pm, vm_offset_t va) 1465{ 1466 struct pvo_entry *pvo; 1467 vm_paddr_t pa; 1468 1469 PMAP_LOCK(pm); 1470 pvo = moea64_pvo_find_va(pm, va); 1471 if (pvo == NULL) 1472 pa = 0; 1473 else 1474 pa = (pvo->pvo_pte.pa & LPTE_RPGN) | (va - PVO_VADDR(pvo)); 1475 PMAP_UNLOCK(pm); 1476 1477 return (pa); 1478} 1479 1480/* 1481 * Atomically extract and hold the physical page with the given 1482 * pmap and virtual address pair if that mapping permits the given 1483 * protection. 1484 */ 1485vm_page_t 1486moea64_extract_and_hold(mmu_t mmu, pmap_t pmap, vm_offset_t va, vm_prot_t prot) 1487{ 1488 struct pvo_entry *pvo; 1489 vm_page_t m; 1490 vm_paddr_t pa; 1491 1492 m = NULL; 1493 pa = 0; 1494 PMAP_LOCK(pmap); 1495retry: 1496 pvo = moea64_pvo_find_va(pmap, va & ~ADDR_POFF); 1497 if (pvo != NULL && (pvo->pvo_pte.prot & prot) == prot) { 1498 if (vm_page_pa_tryrelock(pmap, 1499 pvo->pvo_pte.pa & LPTE_RPGN, &pa)) 1500 goto retry; 1501 m = PHYS_TO_VM_PAGE(pvo->pvo_pte.pa & LPTE_RPGN); 1502 vm_page_hold(m); 1503 } 1504 PA_UNLOCK_COND(pa); 1505 PMAP_UNLOCK(pmap); 1506 return (m); 1507} 1508 1509static mmu_t installed_mmu; 1510 1511static void * 1512moea64_uma_page_alloc(uma_zone_t zone, vm_size_t bytes, uint8_t *flags, 1513 int wait) 1514{ 1515 struct pvo_entry *pvo; 1516 vm_offset_t va; 1517 vm_page_t m; 1518 int pflags, needed_lock; 1519 1520 /* 1521 * This entire routine is a horrible hack to avoid bothering kmem 1522 * for new KVA addresses. Because this can get called from inside 1523 * kmem allocation routines, calling kmem for a new address here 1524 * can lead to multiply locking non-recursive mutexes. 1525 */ 1526 1527 *flags = UMA_SLAB_PRIV; 1528 needed_lock = !PMAP_LOCKED(kernel_pmap); 1529 pflags = malloc2vm_flags(wait) | VM_ALLOC_WIRED; 1530 1531 for (;;) { 1532 m = vm_page_alloc(NULL, 0, pflags | VM_ALLOC_NOOBJ); 1533 if (m == NULL) { 1534 if (wait & M_NOWAIT) 1535 return (NULL); 1536 VM_WAIT; 1537 } else 1538 break; 1539 } 1540 1541 va = VM_PAGE_TO_PHYS(m); 1542 1543 pvo = alloc_pvo_entry(1 /* bootstrap */); 1544 1545 pvo->pvo_pte.prot = VM_PROT_READ | VM_PROT_WRITE; 1546 pvo->pvo_pte.pa = VM_PAGE_TO_PHYS(m) | LPTE_M; 1547 1548 if (needed_lock) 1549 PMAP_LOCK(kernel_pmap); 1550 1551 init_pvo_entry(pvo, kernel_pmap, va); 1552 pvo->pvo_vaddr |= PVO_WIRED; 1553 1554 moea64_pvo_enter(installed_mmu, pvo, NULL); 1555 1556 if (needed_lock) 1557 PMAP_UNLOCK(kernel_pmap); 1558 1559 if ((wait & M_ZERO) && (m->flags & PG_ZERO) == 0) 1560 bzero((void *)va, PAGE_SIZE); 1561 1562 return (void *)va; 1563} 1564 1565extern int elf32_nxstack; 1566 1567void 1568moea64_init(mmu_t mmu) 1569{ 1570 1571 CTR0(KTR_PMAP, "moea64_init"); 1572 1573 moea64_pvo_zone = uma_zcreate("UPVO entry", sizeof (struct pvo_entry), 1574 NULL, NULL, NULL, NULL, UMA_ALIGN_PTR, 1575 UMA_ZONE_VM | UMA_ZONE_NOFREE); 1576 1577 if (!hw_direct_map) { 1578 installed_mmu = mmu; 1579 uma_zone_set_allocf(moea64_pvo_zone,moea64_uma_page_alloc); 1580 } 1581 1582#ifdef COMPAT_FREEBSD32 1583 elf32_nxstack = 1; 1584#endif 1585 1586 moea64_initialized = TRUE; 1587} 1588 1589boolean_t 1590moea64_is_referenced(mmu_t mmu, vm_page_t m) 1591{ 1592 1593 KASSERT((m->oflags & VPO_UNMANAGED) == 0, 1594 ("moea64_is_referenced: page %p is not managed", m)); 1595 1596 return (moea64_query_bit(mmu, m, LPTE_REF)); 1597} 1598 1599boolean_t 1600moea64_is_modified(mmu_t mmu, vm_page_t m) 1601{ 1602 1603 KASSERT((m->oflags & VPO_UNMANAGED) == 0, 1604 ("moea64_is_modified: page %p is not managed", m)); 1605 1606 /* 1607 * If the page is not exclusive busied, then PGA_WRITEABLE cannot be 1608 * concurrently set while the object is locked. Thus, if PGA_WRITEABLE 1609 * is clear, no PTEs can have LPTE_CHG set. 1610 */ 1611 VM_OBJECT_ASSERT_LOCKED(m->object); 1612 if (!vm_page_xbusied(m) && (m->aflags & PGA_WRITEABLE) == 0) 1613 return (FALSE); 1614 return (moea64_query_bit(mmu, m, LPTE_CHG)); 1615} 1616 1617boolean_t 1618moea64_is_prefaultable(mmu_t mmu, pmap_t pmap, vm_offset_t va) 1619{ 1620 struct pvo_entry *pvo; 1621 boolean_t rv = TRUE; 1622 1623 PMAP_LOCK(pmap); 1624 pvo = moea64_pvo_find_va(pmap, va & ~ADDR_POFF); 1625 if (pvo != NULL) 1626 rv = FALSE; 1627 PMAP_UNLOCK(pmap); 1628 return (rv); 1629} 1630 1631void 1632moea64_clear_modify(mmu_t mmu, vm_page_t m) 1633{ 1634 1635 KASSERT((m->oflags & VPO_UNMANAGED) == 0, 1636 ("moea64_clear_modify: page %p is not managed", m)); 1637 VM_OBJECT_ASSERT_WLOCKED(m->object); 1638 KASSERT(!vm_page_xbusied(m), 1639 ("moea64_clear_modify: page %p is exclusive busied", m)); 1640 1641 /* 1642 * If the page is not PGA_WRITEABLE, then no PTEs can have LPTE_CHG 1643 * set. If the object containing the page is locked and the page is 1644 * not exclusive busied, then PGA_WRITEABLE cannot be concurrently set. 1645 */ 1646 if ((m->aflags & PGA_WRITEABLE) == 0) 1647 return; 1648 moea64_clear_bit(mmu, m, LPTE_CHG); 1649} 1650 1651/* 1652 * Clear the write and modified bits in each of the given page's mappings. 1653 */ 1654void 1655moea64_remove_write(mmu_t mmu, vm_page_t m) 1656{ 1657 struct pvo_entry *pvo; 1658 int64_t refchg, ret; 1659 pmap_t pmap; 1660 1661 KASSERT((m->oflags & VPO_UNMANAGED) == 0, 1662 ("moea64_remove_write: page %p is not managed", m)); 1663 1664 /* 1665 * If the page is not exclusive busied, then PGA_WRITEABLE cannot be 1666 * set by another thread while the object is locked. Thus, 1667 * if PGA_WRITEABLE is clear, no page table entries need updating. 1668 */ 1669 VM_OBJECT_ASSERT_WLOCKED(m->object); 1670 if (!vm_page_xbusied(m) && (m->aflags & PGA_WRITEABLE) == 0) 1671 return; 1672 powerpc_sync(); 1673 PV_PAGE_LOCK(m); 1674 refchg = 0; 1675 LIST_FOREACH(pvo, vm_page_to_pvoh(m), pvo_vlink) { 1676 pmap = pvo->pvo_pmap; 1677 PMAP_LOCK(pmap); 1678 if (!(pvo->pvo_vaddr & PVO_DEAD) && 1679 (pvo->pvo_pte.prot & VM_PROT_WRITE)) { 1680 pvo->pvo_pte.prot &= ~VM_PROT_WRITE; 1681 ret = MOEA64_PTE_REPLACE(mmu, pvo, 1682 MOEA64_PTE_PROT_UPDATE); 1683 if (ret < 0) 1684 ret = LPTE_CHG; 1685 refchg |= ret; 1686 if (pvo->pvo_pmap == kernel_pmap) 1687 isync(); 1688 } 1689 PMAP_UNLOCK(pmap); 1690 } 1691 if ((refchg | atomic_readandclear_32(&m->md.mdpg_attrs)) & LPTE_CHG) 1692 vm_page_dirty(m); 1693 vm_page_aflag_clear(m, PGA_WRITEABLE); 1694 PV_PAGE_UNLOCK(m); 1695} 1696 1697/* 1698 * moea64_ts_referenced: 1699 * 1700 * Return a count of reference bits for a page, clearing those bits. 1701 * It is not necessary for every reference bit to be cleared, but it 1702 * is necessary that 0 only be returned when there are truly no 1703 * reference bits set. 1704 * 1705 * XXX: The exact number of bits to check and clear is a matter that 1706 * should be tested and standardized at some point in the future for 1707 * optimal aging of shared pages. 1708 */ 1709int 1710moea64_ts_referenced(mmu_t mmu, vm_page_t m) 1711{ 1712 1713 KASSERT((m->oflags & VPO_UNMANAGED) == 0, 1714 ("moea64_ts_referenced: page %p is not managed", m)); 1715 return (moea64_clear_bit(mmu, m, LPTE_REF)); 1716} 1717 1718/* 1719 * Modify the WIMG settings of all mappings for a page. 1720 */ 1721void 1722moea64_page_set_memattr(mmu_t mmu, vm_page_t m, vm_memattr_t ma) 1723{ 1724 struct pvo_entry *pvo; 1725 int64_t refchg; 1726 pmap_t pmap; 1727 uint64_t lo; 1728 1729 if ((m->oflags & VPO_UNMANAGED) != 0) { 1730 m->md.mdpg_cache_attrs = ma; 1731 return; 1732 } 1733 1734 lo = moea64_calc_wimg(VM_PAGE_TO_PHYS(m), ma); 1735 1736 PV_PAGE_LOCK(m); 1737 LIST_FOREACH(pvo, vm_page_to_pvoh(m), pvo_vlink) { 1738 pmap = pvo->pvo_pmap; 1739 PMAP_LOCK(pmap); 1740 if (!(pvo->pvo_vaddr & PVO_DEAD)) { 1741 pvo->pvo_pte.pa &= ~LPTE_WIMG; 1742 pvo->pvo_pte.pa |= lo; 1743 refchg = MOEA64_PTE_REPLACE(mmu, pvo, 1744 MOEA64_PTE_INVALIDATE); 1745 if (refchg < 0) 1746 refchg = (pvo->pvo_pte.prot & VM_PROT_WRITE) ? 1747 LPTE_CHG : 0; 1748 if ((pvo->pvo_vaddr & PVO_MANAGED) && 1749 (pvo->pvo_pte.prot & VM_PROT_WRITE)) { 1750 refchg |= 1751 atomic_readandclear_32(&m->md.mdpg_attrs); 1752 if (refchg & LPTE_CHG) 1753 vm_page_dirty(m); 1754 if (refchg & LPTE_REF) 1755 vm_page_aflag_set(m, PGA_REFERENCED); 1756 } 1757 if (pvo->pvo_pmap == kernel_pmap) 1758 isync(); 1759 } 1760 PMAP_UNLOCK(pmap); 1761 } 1762 m->md.mdpg_cache_attrs = ma; 1763 PV_PAGE_UNLOCK(m); 1764} 1765 1766/* 1767 * Map a wired page into kernel virtual address space. 1768 */ 1769void 1770moea64_kenter_attr(mmu_t mmu, vm_offset_t va, vm_paddr_t pa, vm_memattr_t ma) 1771{ 1772 int error; 1773 struct pvo_entry *pvo, *oldpvo; 1774 1775 pvo = alloc_pvo_entry(0); 1776 pvo->pvo_pte.prot = VM_PROT_READ | VM_PROT_WRITE | VM_PROT_EXECUTE; 1777 pvo->pvo_pte.pa = (pa & ~ADDR_POFF) | moea64_calc_wimg(pa, ma); 1778 pvo->pvo_vaddr |= PVO_WIRED; 1779 1780 PMAP_LOCK(kernel_pmap); 1781 oldpvo = moea64_pvo_find_va(kernel_pmap, va); 1782 if (oldpvo != NULL) 1783 moea64_pvo_remove_from_pmap(mmu, oldpvo); 1784 init_pvo_entry(pvo, kernel_pmap, va); 1785 error = moea64_pvo_enter(mmu, pvo, NULL); 1786 PMAP_UNLOCK(kernel_pmap); 1787 1788 /* Free any dead pages */ 1789 if (oldpvo != NULL) { 1790 PV_LOCK(oldpvo->pvo_pte.pa & LPTE_RPGN); 1791 moea64_pvo_remove_from_page(mmu, oldpvo); 1792 PV_UNLOCK(oldpvo->pvo_pte.pa & LPTE_RPGN); 1793 free_pvo_entry(oldpvo); 1794 } 1795 1796 if (error != 0 && error != ENOENT) 1797 panic("moea64_kenter: failed to enter va %#zx pa %#zx: %d", va, 1798 pa, error); 1799} 1800 1801void 1802moea64_kenter(mmu_t mmu, vm_offset_t va, vm_paddr_t pa) 1803{ 1804 1805 moea64_kenter_attr(mmu, va, pa, VM_MEMATTR_DEFAULT); 1806} 1807 1808/* 1809 * Extract the physical page address associated with the given kernel virtual 1810 * address. 1811 */ 1812vm_paddr_t 1813moea64_kextract(mmu_t mmu, vm_offset_t va) 1814{ 1815 struct pvo_entry *pvo; 1816 vm_paddr_t pa; 1817 1818 /* 1819 * Shortcut the direct-mapped case when applicable. We never put 1820 * anything but 1:1 mappings below VM_MIN_KERNEL_ADDRESS. 1821 */ 1822 if (va < VM_MIN_KERNEL_ADDRESS) 1823 return (va); 1824 1825 PMAP_LOCK(kernel_pmap); 1826 pvo = moea64_pvo_find_va(kernel_pmap, va); 1827 KASSERT(pvo != NULL, ("moea64_kextract: no addr found for %#" PRIxPTR, 1828 va)); 1829 pa = (pvo->pvo_pte.pa & LPTE_RPGN) | (va - PVO_VADDR(pvo)); 1830 PMAP_UNLOCK(kernel_pmap); 1831 return (pa); 1832} 1833 1834/* 1835 * Remove a wired page from kernel virtual address space. 1836 */ 1837void 1838moea64_kremove(mmu_t mmu, vm_offset_t va) 1839{ 1840 moea64_remove(mmu, kernel_pmap, va, va + PAGE_SIZE); 1841} 1842 1843/* 1844 * Map a range of physical addresses into kernel virtual address space. 1845 * 1846 * The value passed in *virt is a suggested virtual address for the mapping. 1847 * Architectures which can support a direct-mapped physical to virtual region 1848 * can return the appropriate address within that region, leaving '*virt' 1849 * unchanged. Other architectures should map the pages starting at '*virt' and 1850 * update '*virt' with the first usable address after the mapped region. 1851 */ 1852vm_offset_t 1853moea64_map(mmu_t mmu, vm_offset_t *virt, vm_paddr_t pa_start, 1854 vm_paddr_t pa_end, int prot) 1855{ 1856 vm_offset_t sva, va; 1857 1858 if (hw_direct_map) { 1859 /* 1860 * Check if every page in the region is covered by the direct 1861 * map. The direct map covers all of physical memory. Use 1862 * moea64_calc_wimg() as a shortcut to see if the page is in 1863 * physical memory as a way to see if the direct map covers it. 1864 */ 1865 for (va = pa_start; va < pa_end; va += PAGE_SIZE) 1866 if (moea64_calc_wimg(va, VM_MEMATTR_DEFAULT) != LPTE_M) 1867 break; 1868 if (va == pa_end) 1869 return (pa_start); 1870 } 1871 sva = *virt; 1872 va = sva; 1873 /* XXX respect prot argument */ 1874 for (; pa_start < pa_end; pa_start += PAGE_SIZE, va += PAGE_SIZE) 1875 moea64_kenter(mmu, va, pa_start); 1876 *virt = va; 1877 1878 return (sva); 1879} 1880 1881/* 1882 * Returns true if the pmap's pv is one of the first 1883 * 16 pvs linked to from this page. This count may 1884 * be changed upwards or downwards in the future; it 1885 * is only necessary that true be returned for a small 1886 * subset of pmaps for proper page aging. 1887 */ 1888boolean_t 1889moea64_page_exists_quick(mmu_t mmu, pmap_t pmap, vm_page_t m) 1890{ 1891 int loops; 1892 struct pvo_entry *pvo; 1893 boolean_t rv; 1894 1895 KASSERT((m->oflags & VPO_UNMANAGED) == 0, 1896 ("moea64_page_exists_quick: page %p is not managed", m)); 1897 loops = 0; 1898 rv = FALSE; 1899 PV_PAGE_LOCK(m); 1900 LIST_FOREACH(pvo, vm_page_to_pvoh(m), pvo_vlink) { 1901 if (!(pvo->pvo_vaddr & PVO_DEAD) && pvo->pvo_pmap == pmap) { 1902 rv = TRUE; 1903 break; 1904 } 1905 if (++loops >= 16) 1906 break; 1907 } 1908 PV_PAGE_UNLOCK(m); 1909 return (rv); 1910} 1911 1912void 1913moea64_page_init(mmu_t mmu __unused, vm_page_t m) 1914{ 1915 1916 m->md.mdpg_attrs = 0; 1917 m->md.mdpg_cache_attrs = VM_MEMATTR_DEFAULT; 1918 LIST_INIT(&m->md.mdpg_pvoh); 1919} 1920 1921/* 1922 * Return the number of managed mappings to the given physical page 1923 * that are wired. 1924 */ 1925int 1926moea64_page_wired_mappings(mmu_t mmu, vm_page_t m) 1927{ 1928 struct pvo_entry *pvo; 1929 int count; 1930 1931 count = 0; 1932 if ((m->oflags & VPO_UNMANAGED) != 0) 1933 return (count); 1934 PV_PAGE_LOCK(m); 1935 LIST_FOREACH(pvo, vm_page_to_pvoh(m), pvo_vlink) 1936 if ((pvo->pvo_vaddr & (PVO_DEAD | PVO_WIRED)) == PVO_WIRED) 1937 count++; 1938 PV_PAGE_UNLOCK(m); 1939 return (count); 1940} 1941 1942static uintptr_t moea64_vsidcontext; 1943 1944uintptr_t 1945moea64_get_unique_vsid(void) { 1946 u_int entropy; 1947 register_t hash; 1948 uint32_t mask; 1949 int i; 1950 1951 entropy = 0; 1952 __asm __volatile("mftb %0" : "=r"(entropy)); 1953 1954 mtx_lock(&moea64_slb_mutex); 1955 for (i = 0; i < NVSIDS; i += VSID_NBPW) { 1956 u_int n; 1957 1958 /* 1959 * Create a new value by mutiplying by a prime and adding in 1960 * entropy from the timebase register. This is to make the 1961 * VSID more random so that the PT hash function collides 1962 * less often. (Note that the prime casues gcc to do shifts 1963 * instead of a multiply.) 1964 */ 1965 moea64_vsidcontext = (moea64_vsidcontext * 0x1105) + entropy; 1966 hash = moea64_vsidcontext & (NVSIDS - 1); 1967 if (hash == 0) /* 0 is special, avoid it */ 1968 continue; 1969 n = hash >> 5; 1970 mask = 1 << (hash & (VSID_NBPW - 1)); 1971 hash = (moea64_vsidcontext & VSID_HASHMASK); 1972 if (moea64_vsid_bitmap[n] & mask) { /* collision? */ 1973 /* anything free in this bucket? */ 1974 if (moea64_vsid_bitmap[n] == 0xffffffff) { 1975 entropy = (moea64_vsidcontext >> 20); 1976 continue; 1977 } 1978 i = ffs(~moea64_vsid_bitmap[n]) - 1; 1979 mask = 1 << i; 1980 hash &= rounddown2(VSID_HASHMASK, VSID_NBPW); 1981 hash |= i; 1982 } 1983 if (hash == VSID_VRMA) /* also special, avoid this too */ 1984 continue; 1985 KASSERT(!(moea64_vsid_bitmap[n] & mask), 1986 ("Allocating in-use VSID %#zx\n", hash)); 1987 moea64_vsid_bitmap[n] |= mask; 1988 mtx_unlock(&moea64_slb_mutex); 1989 return (hash); 1990 } 1991 1992 mtx_unlock(&moea64_slb_mutex); 1993 panic("%s: out of segments",__func__); 1994} 1995 1996#ifdef __powerpc64__ 1997void 1998moea64_pinit(mmu_t mmu, pmap_t pmap) 1999{ 2000 2001 RB_INIT(&pmap->pmap_pvo); 2002 2003 pmap->pm_slb_tree_root = slb_alloc_tree(); 2004 pmap->pm_slb = slb_alloc_user_cache(); 2005 pmap->pm_slb_len = 0; 2006} 2007#else 2008void 2009moea64_pinit(mmu_t mmu, pmap_t pmap) 2010{ 2011 int i; 2012 uint32_t hash; 2013 2014 RB_INIT(&pmap->pmap_pvo); 2015 2016 if (pmap_bootstrapped) 2017 pmap->pmap_phys = (pmap_t)moea64_kextract(mmu, 2018 (vm_offset_t)pmap); 2019 else 2020 pmap->pmap_phys = pmap; 2021 2022 /* 2023 * Allocate some segment registers for this pmap. 2024 */ 2025 hash = moea64_get_unique_vsid(); 2026 2027 for (i = 0; i < 16; i++) 2028 pmap->pm_sr[i] = VSID_MAKE(i, hash); 2029 2030 KASSERT(pmap->pm_sr[0] != 0, ("moea64_pinit: pm_sr[0] = 0")); 2031} 2032#endif 2033 2034/* 2035 * Initialize the pmap associated with process 0. 2036 */ 2037void 2038moea64_pinit0(mmu_t mmu, pmap_t pm) 2039{ 2040 2041 PMAP_LOCK_INIT(pm); 2042 moea64_pinit(mmu, pm); 2043 bzero(&pm->pm_stats, sizeof(pm->pm_stats)); 2044} 2045 2046/* 2047 * Set the physical protection on the specified range of this map as requested. 2048 */ 2049static void 2050moea64_pvo_protect(mmu_t mmu, pmap_t pm, struct pvo_entry *pvo, vm_prot_t prot) 2051{ 2052 struct vm_page *pg; 2053 vm_prot_t oldprot; 2054 int32_t refchg; 2055 2056 PMAP_LOCK_ASSERT(pm, MA_OWNED); 2057 2058 /* 2059 * Change the protection of the page. 2060 */ 2061 oldprot = pvo->pvo_pte.prot; 2062 pvo->pvo_pte.prot = prot; 2063 pg = PHYS_TO_VM_PAGE(pvo->pvo_pte.pa & LPTE_RPGN); 2064 2065 /* 2066 * If the PVO is in the page table, update mapping 2067 */ 2068 refchg = MOEA64_PTE_REPLACE(mmu, pvo, MOEA64_PTE_PROT_UPDATE); 2069 if (refchg < 0) 2070 refchg = (oldprot & VM_PROT_WRITE) ? LPTE_CHG : 0; 2071 2072 if (pm != kernel_pmap && pg != NULL && !(pg->aflags & PGA_EXECUTABLE) && 2073 (pvo->pvo_pte.pa & (LPTE_I | LPTE_G | LPTE_NOEXEC)) == 0) { 2074 if ((pg->oflags & VPO_UNMANAGED) == 0) 2075 vm_page_aflag_set(pg, PGA_EXECUTABLE); 2076 moea64_syncicache(mmu, pm, PVO_VADDR(pvo), 2077 pvo->pvo_pte.pa & LPTE_RPGN, PAGE_SIZE); 2078 } 2079 2080 /* 2081 * Update vm about the REF/CHG bits if the page is managed and we have 2082 * removed write access. 2083 */ 2084 if (pg != NULL && (pvo->pvo_vaddr & PVO_MANAGED) && 2085 (oldprot & VM_PROT_WRITE)) { 2086 refchg |= atomic_readandclear_32(&pg->md.mdpg_attrs); 2087 if (refchg & LPTE_CHG) 2088 vm_page_dirty(pg); 2089 if (refchg & LPTE_REF) 2090 vm_page_aflag_set(pg, PGA_REFERENCED); 2091 } 2092} 2093 2094void 2095moea64_protect(mmu_t mmu, pmap_t pm, vm_offset_t sva, vm_offset_t eva, 2096 vm_prot_t prot) 2097{ 2098 struct pvo_entry *pvo, *tpvo, key; 2099 2100 CTR4(KTR_PMAP, "moea64_protect: pm=%p sva=%#x eva=%#x prot=%#x", pm, 2101 sva, eva, prot); 2102 2103 KASSERT(pm == &curproc->p_vmspace->vm_pmap || pm == kernel_pmap, 2104 ("moea64_protect: non current pmap")); 2105 2106 if ((prot & VM_PROT_READ) == VM_PROT_NONE) { 2107 moea64_remove(mmu, pm, sva, eva); 2108 return; 2109 } 2110 2111 PMAP_LOCK(pm); 2112 key.pvo_vaddr = sva; 2113 for (pvo = RB_NFIND(pvo_tree, &pm->pmap_pvo, &key); 2114 pvo != NULL && PVO_VADDR(pvo) < eva; pvo = tpvo) { 2115 tpvo = RB_NEXT(pvo_tree, &pm->pmap_pvo, pvo); 2116 moea64_pvo_protect(mmu, pm, pvo, prot); 2117 } 2118 PMAP_UNLOCK(pm); 2119} 2120 2121/* 2122 * Map a list of wired pages into kernel virtual address space. This is 2123 * intended for temporary mappings which do not need page modification or 2124 * references recorded. Existing mappings in the region are overwritten. 2125 */ 2126void 2127moea64_qenter(mmu_t mmu, vm_offset_t va, vm_page_t *m, int count) 2128{ 2129 while (count-- > 0) { 2130 moea64_kenter(mmu, va, VM_PAGE_TO_PHYS(*m)); 2131 va += PAGE_SIZE; 2132 m++; 2133 } 2134} 2135 2136/* 2137 * Remove page mappings from kernel virtual address space. Intended for 2138 * temporary mappings entered by moea64_qenter. 2139 */ 2140void 2141moea64_qremove(mmu_t mmu, vm_offset_t va, int count) 2142{ 2143 while (count-- > 0) { 2144 moea64_kremove(mmu, va); 2145 va += PAGE_SIZE; 2146 } 2147} 2148 2149void 2150moea64_release_vsid(uint64_t vsid) 2151{ 2152 int idx, mask; 2153 2154 mtx_lock(&moea64_slb_mutex); 2155 idx = vsid & (NVSIDS-1); 2156 mask = 1 << (idx % VSID_NBPW); 2157 idx /= VSID_NBPW; 2158 KASSERT(moea64_vsid_bitmap[idx] & mask, 2159 ("Freeing unallocated VSID %#jx", vsid)); 2160 moea64_vsid_bitmap[idx] &= ~mask; 2161 mtx_unlock(&moea64_slb_mutex); 2162} 2163 2164 2165void 2166moea64_release(mmu_t mmu, pmap_t pmap) 2167{ 2168 2169 /* 2170 * Free segment registers' VSIDs 2171 */ 2172 #ifdef __powerpc64__ 2173 slb_free_tree(pmap); 2174 slb_free_user_cache(pmap->pm_slb); 2175 #else 2176 KASSERT(pmap->pm_sr[0] != 0, ("moea64_release: pm_sr[0] = 0")); 2177 2178 moea64_release_vsid(VSID_TO_HASH(pmap->pm_sr[0])); 2179 #endif 2180} 2181 2182/* 2183 * Remove all pages mapped by the specified pmap 2184 */ 2185void 2186moea64_remove_pages(mmu_t mmu, pmap_t pm) 2187{ 2188 struct pvo_entry *pvo, *tpvo; 2189 struct pvo_tree tofree; 2190 2191 RB_INIT(&tofree); 2192 2193 PMAP_LOCK(pm); 2194 RB_FOREACH_SAFE(pvo, pvo_tree, &pm->pmap_pvo, tpvo) { 2195 if (pvo->pvo_vaddr & PVO_WIRED) 2196 continue; 2197 2198 /* 2199 * For locking reasons, remove this from the page table and 2200 * pmap, but save delinking from the vm_page for a second 2201 * pass 2202 */ 2203 moea64_pvo_remove_from_pmap(mmu, pvo); 2204 RB_INSERT(pvo_tree, &tofree, pvo); 2205 } 2206 PMAP_UNLOCK(pm); 2207 2208 RB_FOREACH_SAFE(pvo, pvo_tree, &tofree, tpvo) { 2209 PV_LOCK(pvo->pvo_pte.pa & LPTE_RPGN); 2210 moea64_pvo_remove_from_page(mmu, pvo); 2211 PV_UNLOCK(pvo->pvo_pte.pa & LPTE_RPGN); 2212 RB_REMOVE(pvo_tree, &tofree, pvo); 2213 free_pvo_entry(pvo); 2214 } 2215} 2216 2217/* 2218 * Remove the given range of addresses from the specified map. 2219 */ 2220void 2221moea64_remove(mmu_t mmu, pmap_t pm, vm_offset_t sva, vm_offset_t eva) 2222{ 2223 struct pvo_entry *pvo, *tpvo, key; 2224 struct pvo_tree tofree; 2225 2226 /* 2227 * Perform an unsynchronized read. This is, however, safe. 2228 */ 2229 if (pm->pm_stats.resident_count == 0) 2230 return; 2231 2232 key.pvo_vaddr = sva; 2233 2234 RB_INIT(&tofree); 2235 2236 PMAP_LOCK(pm); 2237 for (pvo = RB_NFIND(pvo_tree, &pm->pmap_pvo, &key); 2238 pvo != NULL && PVO_VADDR(pvo) < eva; pvo = tpvo) { 2239 tpvo = RB_NEXT(pvo_tree, &pm->pmap_pvo, pvo); 2240 2241 /* 2242 * For locking reasons, remove this from the page table and 2243 * pmap, but save delinking from the vm_page for a second 2244 * pass 2245 */ 2246 moea64_pvo_remove_from_pmap(mmu, pvo); 2247 RB_INSERT(pvo_tree, &tofree, pvo); 2248 } 2249 PMAP_UNLOCK(pm); 2250 2251 RB_FOREACH_SAFE(pvo, pvo_tree, &tofree, tpvo) { 2252 PV_LOCK(pvo->pvo_pte.pa & LPTE_RPGN); 2253 moea64_pvo_remove_from_page(mmu, pvo); 2254 PV_UNLOCK(pvo->pvo_pte.pa & LPTE_RPGN); 2255 RB_REMOVE(pvo_tree, &tofree, pvo); 2256 free_pvo_entry(pvo); 2257 } 2258} 2259 2260/* 2261 * Remove physical page from all pmaps in which it resides. moea64_pvo_remove() 2262 * will reflect changes in pte's back to the vm_page. 2263 */ 2264void 2265moea64_remove_all(mmu_t mmu, vm_page_t m) 2266{ 2267 struct pvo_entry *pvo, *next_pvo; 2268 struct pvo_head freequeue; 2269 int wasdead; 2270 pmap_t pmap; 2271 2272 LIST_INIT(&freequeue); 2273 2274 PV_PAGE_LOCK(m); 2275 LIST_FOREACH_SAFE(pvo, vm_page_to_pvoh(m), pvo_vlink, next_pvo) { 2276 pmap = pvo->pvo_pmap; 2277 PMAP_LOCK(pmap); 2278 wasdead = (pvo->pvo_vaddr & PVO_DEAD); 2279 if (!wasdead) 2280 moea64_pvo_remove_from_pmap(mmu, pvo); 2281 moea64_pvo_remove_from_page(mmu, pvo); 2282 if (!wasdead) 2283 LIST_INSERT_HEAD(&freequeue, pvo, pvo_vlink); 2284 PMAP_UNLOCK(pmap); 2285 2286 } 2287 KASSERT(!pmap_page_is_mapped(m), ("Page still has mappings")); 2288 KASSERT(!(m->aflags & PGA_WRITEABLE), ("Page still writable")); 2289 PV_PAGE_UNLOCK(m); 2290 2291 /* Clean up UMA allocations */ 2292 LIST_FOREACH_SAFE(pvo, &freequeue, pvo_vlink, next_pvo) 2293 free_pvo_entry(pvo); 2294} 2295 2296/* 2297 * Allocate a physical page of memory directly from the phys_avail map. 2298 * Can only be called from moea64_bootstrap before avail start and end are 2299 * calculated. 2300 */ 2301vm_offset_t 2302moea64_bootstrap_alloc(vm_size_t size, u_int align) 2303{ 2304 vm_offset_t s, e; 2305 int i, j; 2306 2307 size = round_page(size); 2308 for (i = 0; phys_avail[i + 1] != 0; i += 2) { 2309 if (align != 0) 2310 s = roundup2(phys_avail[i], align); 2311 else 2312 s = phys_avail[i]; 2313 e = s + size; 2314 2315 if (s < phys_avail[i] || e > phys_avail[i + 1]) 2316 continue; 2317 2318 if (s + size > platform_real_maxaddr()) 2319 continue; 2320 2321 if (s == phys_avail[i]) { 2322 phys_avail[i] += size; 2323 } else if (e == phys_avail[i + 1]) { 2324 phys_avail[i + 1] -= size; 2325 } else { 2326 for (j = phys_avail_count * 2; j > i; j -= 2) { 2327 phys_avail[j] = phys_avail[j - 2]; 2328 phys_avail[j + 1] = phys_avail[j - 1]; 2329 } 2330 2331 phys_avail[i + 3] = phys_avail[i + 1]; 2332 phys_avail[i + 1] = s; 2333 phys_avail[i + 2] = e; 2334 phys_avail_count++; 2335 } 2336 2337 return (s); 2338 } 2339 panic("moea64_bootstrap_alloc: could not allocate memory"); 2340} 2341 2342static int 2343moea64_pvo_enter(mmu_t mmu, struct pvo_entry *pvo, struct pvo_head *pvo_head) 2344{ 2345 int first, err; 2346 2347 PMAP_LOCK_ASSERT(pvo->pvo_pmap, MA_OWNED); 2348 KASSERT(moea64_pvo_find_va(pvo->pvo_pmap, PVO_VADDR(pvo)) == NULL, 2349 ("Existing mapping for VA %#jx", (uintmax_t)PVO_VADDR(pvo))); 2350 2351 moea64_pvo_enter_calls++; 2352 2353 /* 2354 * Add to pmap list 2355 */ 2356 RB_INSERT(pvo_tree, &pvo->pvo_pmap->pmap_pvo, pvo); 2357 2358 /* 2359 * Remember if the list was empty and therefore will be the first 2360 * item. 2361 */ 2362 if (pvo_head != NULL) { 2363 if (LIST_FIRST(pvo_head) == NULL) 2364 first = 1; 2365 LIST_INSERT_HEAD(pvo_head, pvo, pvo_vlink); 2366 } 2367 2368 if (pvo->pvo_vaddr & PVO_WIRED) 2369 pvo->pvo_pmap->pm_stats.wired_count++; 2370 pvo->pvo_pmap->pm_stats.resident_count++; 2371 2372 /* 2373 * Insert it into the hardware page table 2374 */ 2375 err = MOEA64_PTE_INSERT(mmu, pvo); 2376 if (err != 0) { 2377 panic("moea64_pvo_enter: overflow"); 2378 } 2379 2380 moea64_pvo_entries++; 2381 2382 if (pvo->pvo_pmap == kernel_pmap) 2383 isync(); 2384 2385#ifdef __powerpc64__ 2386 /* 2387 * Make sure all our bootstrap mappings are in the SLB as soon 2388 * as virtual memory is switched on. 2389 */ 2390 if (!pmap_bootstrapped) 2391 moea64_bootstrap_slb_prefault(PVO_VADDR(pvo), 2392 pvo->pvo_vaddr & PVO_LARGE); 2393#endif 2394 2395 return (first ? ENOENT : 0); 2396} 2397 2398static void 2399moea64_pvo_remove_from_pmap(mmu_t mmu, struct pvo_entry *pvo) 2400{ 2401 struct vm_page *pg; 2402 int32_t refchg; 2403 2404 KASSERT(pvo->pvo_pmap != NULL, ("Trying to remove PVO with no pmap")); 2405 PMAP_LOCK_ASSERT(pvo->pvo_pmap, MA_OWNED); 2406 KASSERT(!(pvo->pvo_vaddr & PVO_DEAD), ("Trying to remove dead PVO")); 2407 2408 /* 2409 * If there is an active pte entry, we need to deactivate it 2410 */ 2411 refchg = MOEA64_PTE_UNSET(mmu, pvo); 2412 if (refchg < 0) { 2413 /* 2414 * If it was evicted from the page table, be pessimistic and 2415 * dirty the page. 2416 */ 2417 if (pvo->pvo_pte.prot & VM_PROT_WRITE) 2418 refchg = LPTE_CHG; 2419 else 2420 refchg = 0; 2421 } 2422 2423 /* 2424 * Update our statistics. 2425 */ 2426 pvo->pvo_pmap->pm_stats.resident_count--; 2427 if (pvo->pvo_vaddr & PVO_WIRED) 2428 pvo->pvo_pmap->pm_stats.wired_count--; 2429 2430 /* 2431 * Remove this PVO from the pmap list. 2432 */ 2433 RB_REMOVE(pvo_tree, &pvo->pvo_pmap->pmap_pvo, pvo); 2434 2435 /* 2436 * Mark this for the next sweep 2437 */ 2438 pvo->pvo_vaddr |= PVO_DEAD; 2439 2440 /* Send RC bits to VM */ 2441 if ((pvo->pvo_vaddr & PVO_MANAGED) && 2442 (pvo->pvo_pte.prot & VM_PROT_WRITE)) { 2443 pg = PHYS_TO_VM_PAGE(pvo->pvo_pte.pa & LPTE_RPGN); 2444 if (pg != NULL) { 2445 refchg |= atomic_readandclear_32(&pg->md.mdpg_attrs); 2446 if (refchg & LPTE_CHG) 2447 vm_page_dirty(pg); 2448 if (refchg & LPTE_REF) 2449 vm_page_aflag_set(pg, PGA_REFERENCED); 2450 } 2451 } 2452} 2453 2454static void 2455moea64_pvo_remove_from_page(mmu_t mmu, struct pvo_entry *pvo) 2456{ 2457 struct vm_page *pg; 2458 2459 KASSERT(pvo->pvo_vaddr & PVO_DEAD, ("Trying to delink live page")); 2460 2461 /* Use NULL pmaps as a sentinel for races in page deletion */ 2462 if (pvo->pvo_pmap == NULL) 2463 return; 2464 pvo->pvo_pmap = NULL; 2465 2466 /* 2467 * Update vm about page writeability/executability if managed 2468 */ 2469 PV_LOCKASSERT(pvo->pvo_pte.pa & LPTE_RPGN); 2470 pg = PHYS_TO_VM_PAGE(pvo->pvo_pte.pa & LPTE_RPGN); 2471 2472 if ((pvo->pvo_vaddr & PVO_MANAGED) && pg != NULL) { 2473 LIST_REMOVE(pvo, pvo_vlink); 2474 if (LIST_EMPTY(vm_page_to_pvoh(pg))) 2475 vm_page_aflag_clear(pg, PGA_WRITEABLE | PGA_EXECUTABLE); 2476 } 2477 2478 moea64_pvo_entries--; 2479 moea64_pvo_remove_calls++; 2480} 2481 2482static struct pvo_entry * 2483moea64_pvo_find_va(pmap_t pm, vm_offset_t va) 2484{ 2485 struct pvo_entry key; 2486 2487 PMAP_LOCK_ASSERT(pm, MA_OWNED); 2488 2489 key.pvo_vaddr = va & ~ADDR_POFF; 2490 return (RB_FIND(pvo_tree, &pm->pmap_pvo, &key)); 2491} 2492 2493static boolean_t 2494moea64_query_bit(mmu_t mmu, vm_page_t m, uint64_t ptebit) 2495{ 2496 struct pvo_entry *pvo; 2497 int64_t ret; 2498 boolean_t rv; 2499 2500 /* 2501 * See if this bit is stored in the page already. 2502 */ 2503 if (m->md.mdpg_attrs & ptebit) 2504 return (TRUE); 2505 2506 /* 2507 * Examine each PTE. Sync so that any pending REF/CHG bits are 2508 * flushed to the PTEs. 2509 */ 2510 rv = FALSE; 2511 powerpc_sync(); 2512 PV_PAGE_LOCK(m); 2513 LIST_FOREACH(pvo, vm_page_to_pvoh(m), pvo_vlink) { 2514 ret = 0; 2515 2516 /* 2517 * See if this pvo has a valid PTE. if so, fetch the 2518 * REF/CHG bits from the valid PTE. If the appropriate 2519 * ptebit is set, return success. 2520 */ 2521 PMAP_LOCK(pvo->pvo_pmap); 2522 if (!(pvo->pvo_vaddr & PVO_DEAD)) 2523 ret = MOEA64_PTE_SYNCH(mmu, pvo); 2524 PMAP_UNLOCK(pvo->pvo_pmap); 2525 2526 if (ret > 0) { 2527 atomic_set_32(&m->md.mdpg_attrs, 2528 ret & (LPTE_CHG | LPTE_REF)); 2529 if (ret & ptebit) { 2530 rv = TRUE; 2531 break; 2532 } 2533 } 2534 } 2535 PV_PAGE_UNLOCK(m); 2536 2537 return (rv); 2538} 2539 2540static u_int 2541moea64_clear_bit(mmu_t mmu, vm_page_t m, u_int64_t ptebit) 2542{ 2543 u_int count; 2544 struct pvo_entry *pvo; 2545 int64_t ret; 2546 2547 /* 2548 * Sync so that any pending REF/CHG bits are flushed to the PTEs (so 2549 * we can reset the right ones). 2550 */ 2551 powerpc_sync(); 2552 2553 /* 2554 * For each pvo entry, clear the pte's ptebit. 2555 */ 2556 count = 0; 2557 PV_PAGE_LOCK(m); 2558 LIST_FOREACH(pvo, vm_page_to_pvoh(m), pvo_vlink) { 2559 ret = 0; 2560 2561 PMAP_LOCK(pvo->pvo_pmap); 2562 if (!(pvo->pvo_vaddr & PVO_DEAD)) 2563 ret = MOEA64_PTE_CLEAR(mmu, pvo, ptebit); 2564 PMAP_UNLOCK(pvo->pvo_pmap); 2565 2566 if (ret > 0 && (ret & ptebit)) 2567 count++; 2568 } 2569 atomic_clear_32(&m->md.mdpg_attrs, ptebit); 2570 PV_PAGE_UNLOCK(m); 2571 2572 return (count); 2573} 2574 2575boolean_t 2576moea64_dev_direct_mapped(mmu_t mmu, vm_paddr_t pa, vm_size_t size) 2577{ 2578 struct pvo_entry *pvo, key; 2579 vm_offset_t ppa; 2580 int error = 0; 2581 2582 PMAP_LOCK(kernel_pmap); 2583 key.pvo_vaddr = ppa = pa & ~ADDR_POFF; 2584 for (pvo = RB_FIND(pvo_tree, &kernel_pmap->pmap_pvo, &key); 2585 ppa < pa + size; ppa += PAGE_SIZE, 2586 pvo = RB_NEXT(pvo_tree, &kernel_pmap->pmap_pvo, pvo)) { 2587 if (pvo == NULL || (pvo->pvo_pte.pa & LPTE_RPGN) != ppa) { 2588 error = EFAULT; 2589 break; 2590 } 2591 } 2592 PMAP_UNLOCK(kernel_pmap); 2593 2594 return (error); 2595} 2596 2597/* 2598 * Map a set of physical memory pages into the kernel virtual 2599 * address space. Return a pointer to where it is mapped. This 2600 * routine is intended to be used for mapping device memory, 2601 * NOT real memory. 2602 */ 2603void * 2604moea64_mapdev_attr(mmu_t mmu, vm_paddr_t pa, vm_size_t size, vm_memattr_t ma) 2605{ 2606 vm_offset_t va, tmpva, ppa, offset; 2607 2608 ppa = trunc_page(pa); 2609 offset = pa & PAGE_MASK; 2610 size = roundup2(offset + size, PAGE_SIZE); 2611 2612 va = kva_alloc(size); 2613 2614 if (!va) 2615 panic("moea64_mapdev: Couldn't alloc kernel virtual memory"); 2616 2617 for (tmpva = va; size > 0;) { 2618 moea64_kenter_attr(mmu, tmpva, ppa, ma); 2619 size -= PAGE_SIZE; 2620 tmpva += PAGE_SIZE; 2621 ppa += PAGE_SIZE; 2622 } 2623 2624 return ((void *)(va + offset)); 2625} 2626 2627void * 2628moea64_mapdev(mmu_t mmu, vm_paddr_t pa, vm_size_t size) 2629{ 2630 2631 return moea64_mapdev_attr(mmu, pa, size, VM_MEMATTR_DEFAULT); 2632} 2633 2634void 2635moea64_unmapdev(mmu_t mmu, vm_offset_t va, vm_size_t size) 2636{ 2637 vm_offset_t base, offset; 2638 2639 base = trunc_page(va); 2640 offset = va & PAGE_MASK; 2641 size = roundup2(offset + size, PAGE_SIZE); 2642 2643 kva_free(base, size); 2644} 2645 2646void 2647moea64_sync_icache(mmu_t mmu, pmap_t pm, vm_offset_t va, vm_size_t sz) 2648{ 2649 struct pvo_entry *pvo; 2650 vm_offset_t lim; 2651 vm_paddr_t pa; 2652 vm_size_t len; 2653 2654 PMAP_LOCK(pm); 2655 while (sz > 0) { 2656 lim = round_page(va); 2657 len = MIN(lim - va, sz); 2658 pvo = moea64_pvo_find_va(pm, va & ~ADDR_POFF); 2659 if (pvo != NULL && !(pvo->pvo_pte.pa & LPTE_I)) { 2660 pa = (pvo->pvo_pte.pa & LPTE_RPGN) | (va & ADDR_POFF); 2661 moea64_syncicache(mmu, pm, va, pa, len); 2662 } 2663 va += len; 2664 sz -= len; 2665 } 2666 PMAP_UNLOCK(pm); 2667} 2668 2669void 2670moea64_dumpsys_map(mmu_t mmu, vm_paddr_t pa, size_t sz, void **va) 2671{ 2672 2673 *va = (void *)pa; 2674} 2675 2676extern struct dump_pa dump_map[PHYS_AVAIL_SZ + 1]; 2677 2678void 2679moea64_scan_init(mmu_t mmu) 2680{ 2681 struct pvo_entry *pvo; 2682 vm_offset_t va; 2683 int i; 2684 2685 if (!do_minidump) { 2686 /* Initialize phys. segments for dumpsys(). */ 2687 memset(&dump_map, 0, sizeof(dump_map)); 2688 mem_regions(&pregions, &pregions_sz, ®ions, ®ions_sz); 2689 for (i = 0; i < pregions_sz; i++) { 2690 dump_map[i].pa_start = pregions[i].mr_start; 2691 dump_map[i].pa_size = pregions[i].mr_size; 2692 } 2693 return; 2694 } 2695 2696 /* Virtual segments for minidumps: */ 2697 memset(&dump_map, 0, sizeof(dump_map)); 2698 2699 /* 1st: kernel .data and .bss. */ 2700 dump_map[0].pa_start = trunc_page((uintptr_t)_etext); 2701 dump_map[0].pa_size = round_page((uintptr_t)_end) - 2702 dump_map[0].pa_start; 2703 2704 /* 2nd: msgbuf and tables (see pmap_bootstrap()). */ 2705 dump_map[1].pa_start = (vm_paddr_t)msgbufp->msg_ptr; 2706 dump_map[1].pa_size = round_page(msgbufp->msg_size); 2707 2708 /* 3rd: kernel VM. */ 2709 va = dump_map[1].pa_start + dump_map[1].pa_size; 2710 /* Find start of next chunk (from va). */ 2711 while (va < virtual_end) { 2712 /* Don't dump the buffer cache. */ 2713 if (va >= kmi.buffer_sva && va < kmi.buffer_eva) { 2714 va = kmi.buffer_eva; 2715 continue; 2716 } 2717 pvo = moea64_pvo_find_va(kernel_pmap, va & ~ADDR_POFF); 2718 if (pvo != NULL && !(pvo->pvo_vaddr & PVO_DEAD)) 2719 break; 2720 va += PAGE_SIZE; 2721 } 2722 if (va < virtual_end) { 2723 dump_map[2].pa_start = va; 2724 va += PAGE_SIZE; 2725 /* Find last page in chunk. */ 2726 while (va < virtual_end) { 2727 /* Don't run into the buffer cache. */ 2728 if (va == kmi.buffer_sva) 2729 break; 2730 pvo = moea64_pvo_find_va(kernel_pmap, va & ~ADDR_POFF); 2731 if (pvo != NULL && !(pvo->pvo_vaddr & PVO_DEAD)) 2732 break; 2733 va += PAGE_SIZE; 2734 } 2735 dump_map[2].pa_size = va - dump_map[2].pa_start; 2736 } 2737} 2738 2739