pmap.c revision 270439
1/*- 2 * Copyright (c) 1991 Regents of the University of California. 3 * All rights reserved. 4 * Copyright (c) 1994 John S. Dyson 5 * All rights reserved. 6 * Copyright (c) 1994 David Greenman 7 * All rights reserved. 8 * 9 * This code is derived from software contributed to Berkeley by 10 * the Systems Programming Group of the University of Utah Computer 11 * Science Department and William Jolitz of UUNET Technologies Inc. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 4. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 * from: @(#)pmap.c 7.7 (Berkeley) 5/12/91 38 */ 39 40#include <sys/cdefs.h> 41__FBSDID("$FreeBSD: stable/10/sys/sparc64/sparc64/pmap.c 270439 2014-08-24 07:53:15Z kib $"); 42 43/* 44 * Manages physical address maps. 45 * 46 * Since the information managed by this module is also stored by the 47 * logical address mapping module, this module may throw away valid virtual 48 * to physical mappings at almost any time. However, invalidations of 49 * mappings must be done as requested. 50 * 51 * In order to cope with hardware architectures which make virtual to 52 * physical map invalidates expensive, this module may delay invalidate 53 * reduced protection operations until such time as they are actually 54 * necessary. This module is given full information as to which processors 55 * are currently using which maps, and to when physical maps must be made 56 * correct. 57 */ 58 59#include "opt_kstack_pages.h" 60#include "opt_pmap.h" 61 62#include <sys/param.h> 63#include <sys/kernel.h> 64#include <sys/ktr.h> 65#include <sys/lock.h> 66#include <sys/msgbuf.h> 67#include <sys/mutex.h> 68#include <sys/proc.h> 69#include <sys/rwlock.h> 70#include <sys/smp.h> 71#include <sys/sysctl.h> 72#include <sys/systm.h> 73#include <sys/vmmeter.h> 74 75#include <dev/ofw/openfirm.h> 76 77#include <vm/vm.h> 78#include <vm/vm_param.h> 79#include <vm/vm_kern.h> 80#include <vm/vm_page.h> 81#include <vm/vm_map.h> 82#include <vm/vm_object.h> 83#include <vm/vm_extern.h> 84#include <vm/vm_pageout.h> 85#include <vm/vm_pager.h> 86#include <vm/vm_phys.h> 87 88#include <machine/cache.h> 89#include <machine/frame.h> 90#include <machine/instr.h> 91#include <machine/md_var.h> 92#include <machine/metadata.h> 93#include <machine/ofw_mem.h> 94#include <machine/smp.h> 95#include <machine/tlb.h> 96#include <machine/tte.h> 97#include <machine/tsb.h> 98#include <machine/ver.h> 99 100/* 101 * Virtual address of message buffer 102 */ 103struct msgbuf *msgbufp; 104 105/* 106 * Map of physical memory reagions 107 */ 108vm_paddr_t phys_avail[128]; 109static struct ofw_mem_region mra[128]; 110struct ofw_mem_region sparc64_memreg[128]; 111int sparc64_nmemreg; 112static struct ofw_map translations[128]; 113static int translations_size; 114 115static vm_offset_t pmap_idle_map; 116static vm_offset_t pmap_temp_map_1; 117static vm_offset_t pmap_temp_map_2; 118 119/* 120 * First and last available kernel virtual addresses 121 */ 122vm_offset_t virtual_avail; 123vm_offset_t virtual_end; 124vm_offset_t kernel_vm_end; 125 126vm_offset_t vm_max_kernel_address; 127 128/* 129 * Kernel pmap 130 */ 131struct pmap kernel_pmap_store; 132 133struct rwlock_padalign tte_list_global_lock; 134 135/* 136 * Allocate physical memory for use in pmap_bootstrap. 137 */ 138static vm_paddr_t pmap_bootstrap_alloc(vm_size_t size, uint32_t colors); 139 140static void pmap_bootstrap_set_tte(struct tte *tp, u_long vpn, u_long data); 141static void pmap_cache_remove(vm_page_t m, vm_offset_t va); 142static int pmap_protect_tte(struct pmap *pm1, struct pmap *pm2, 143 struct tte *tp, vm_offset_t va); 144 145/* 146 * Map the given physical page at the specified virtual address in the 147 * target pmap with the protection requested. If specified the page 148 * will be wired down. 149 * 150 * The page queues and pmap must be locked. 151 */ 152static int pmap_enter_locked(pmap_t pm, vm_offset_t va, vm_page_t m, 153 vm_prot_t prot, u_int flags, int8_t psind); 154 155extern int tl1_dmmu_miss_direct_patch_tsb_phys_1[]; 156extern int tl1_dmmu_miss_direct_patch_tsb_phys_end_1[]; 157extern int tl1_dmmu_miss_patch_asi_1[]; 158extern int tl1_dmmu_miss_patch_quad_ldd_1[]; 159extern int tl1_dmmu_miss_patch_tsb_1[]; 160extern int tl1_dmmu_miss_patch_tsb_2[]; 161extern int tl1_dmmu_miss_patch_tsb_mask_1[]; 162extern int tl1_dmmu_miss_patch_tsb_mask_2[]; 163extern int tl1_dmmu_prot_patch_asi_1[]; 164extern int tl1_dmmu_prot_patch_quad_ldd_1[]; 165extern int tl1_dmmu_prot_patch_tsb_1[]; 166extern int tl1_dmmu_prot_patch_tsb_2[]; 167extern int tl1_dmmu_prot_patch_tsb_mask_1[]; 168extern int tl1_dmmu_prot_patch_tsb_mask_2[]; 169extern int tl1_immu_miss_patch_asi_1[]; 170extern int tl1_immu_miss_patch_quad_ldd_1[]; 171extern int tl1_immu_miss_patch_tsb_1[]; 172extern int tl1_immu_miss_patch_tsb_2[]; 173extern int tl1_immu_miss_patch_tsb_mask_1[]; 174extern int tl1_immu_miss_patch_tsb_mask_2[]; 175 176/* 177 * If user pmap is processed with pmap_remove and with pmap_remove and the 178 * resident count drops to 0, there are no more pages to remove, so we 179 * need not continue. 180 */ 181#define PMAP_REMOVE_DONE(pm) \ 182 ((pm) != kernel_pmap && (pm)->pm_stats.resident_count == 0) 183 184/* 185 * The threshold (in bytes) above which tsb_foreach() is used in pmap_remove() 186 * and pmap_protect() instead of trying each virtual address. 187 */ 188#define PMAP_TSB_THRESH ((TSB_SIZE / 2) * PAGE_SIZE) 189 190SYSCTL_NODE(_debug, OID_AUTO, pmap_stats, CTLFLAG_RD, 0, ""); 191 192PMAP_STATS_VAR(pmap_nenter); 193PMAP_STATS_VAR(pmap_nenter_update); 194PMAP_STATS_VAR(pmap_nenter_replace); 195PMAP_STATS_VAR(pmap_nenter_new); 196PMAP_STATS_VAR(pmap_nkenter); 197PMAP_STATS_VAR(pmap_nkenter_oc); 198PMAP_STATS_VAR(pmap_nkenter_stupid); 199PMAP_STATS_VAR(pmap_nkremove); 200PMAP_STATS_VAR(pmap_nqenter); 201PMAP_STATS_VAR(pmap_nqremove); 202PMAP_STATS_VAR(pmap_ncache_enter); 203PMAP_STATS_VAR(pmap_ncache_enter_c); 204PMAP_STATS_VAR(pmap_ncache_enter_oc); 205PMAP_STATS_VAR(pmap_ncache_enter_cc); 206PMAP_STATS_VAR(pmap_ncache_enter_coc); 207PMAP_STATS_VAR(pmap_ncache_enter_nc); 208PMAP_STATS_VAR(pmap_ncache_enter_cnc); 209PMAP_STATS_VAR(pmap_ncache_remove); 210PMAP_STATS_VAR(pmap_ncache_remove_c); 211PMAP_STATS_VAR(pmap_ncache_remove_oc); 212PMAP_STATS_VAR(pmap_ncache_remove_cc); 213PMAP_STATS_VAR(pmap_ncache_remove_coc); 214PMAP_STATS_VAR(pmap_ncache_remove_nc); 215PMAP_STATS_VAR(pmap_nzero_page); 216PMAP_STATS_VAR(pmap_nzero_page_c); 217PMAP_STATS_VAR(pmap_nzero_page_oc); 218PMAP_STATS_VAR(pmap_nzero_page_nc); 219PMAP_STATS_VAR(pmap_nzero_page_area); 220PMAP_STATS_VAR(pmap_nzero_page_area_c); 221PMAP_STATS_VAR(pmap_nzero_page_area_oc); 222PMAP_STATS_VAR(pmap_nzero_page_area_nc); 223PMAP_STATS_VAR(pmap_nzero_page_idle); 224PMAP_STATS_VAR(pmap_nzero_page_idle_c); 225PMAP_STATS_VAR(pmap_nzero_page_idle_oc); 226PMAP_STATS_VAR(pmap_nzero_page_idle_nc); 227PMAP_STATS_VAR(pmap_ncopy_page); 228PMAP_STATS_VAR(pmap_ncopy_page_c); 229PMAP_STATS_VAR(pmap_ncopy_page_oc); 230PMAP_STATS_VAR(pmap_ncopy_page_nc); 231PMAP_STATS_VAR(pmap_ncopy_page_dc); 232PMAP_STATS_VAR(pmap_ncopy_page_doc); 233PMAP_STATS_VAR(pmap_ncopy_page_sc); 234PMAP_STATS_VAR(pmap_ncopy_page_soc); 235 236PMAP_STATS_VAR(pmap_nnew_thread); 237PMAP_STATS_VAR(pmap_nnew_thread_oc); 238 239static inline u_long dtlb_get_data(u_int tlb, u_int slot); 240 241/* 242 * Quick sort callout for comparing memory regions 243 */ 244static int mr_cmp(const void *a, const void *b); 245static int om_cmp(const void *a, const void *b); 246 247static int 248mr_cmp(const void *a, const void *b) 249{ 250 const struct ofw_mem_region *mra; 251 const struct ofw_mem_region *mrb; 252 253 mra = a; 254 mrb = b; 255 if (mra->mr_start < mrb->mr_start) 256 return (-1); 257 else if (mra->mr_start > mrb->mr_start) 258 return (1); 259 else 260 return (0); 261} 262 263static int 264om_cmp(const void *a, const void *b) 265{ 266 const struct ofw_map *oma; 267 const struct ofw_map *omb; 268 269 oma = a; 270 omb = b; 271 if (oma->om_start < omb->om_start) 272 return (-1); 273 else if (oma->om_start > omb->om_start) 274 return (1); 275 else 276 return (0); 277} 278 279static inline u_long 280dtlb_get_data(u_int tlb, u_int slot) 281{ 282 u_long data; 283 register_t s; 284 285 slot = TLB_DAR_SLOT(tlb, slot); 286 /* 287 * We read ASI_DTLB_DATA_ACCESS_REG twice back-to-back in order to 288 * work around errata of USIII and beyond. 289 */ 290 s = intr_disable(); 291 (void)ldxa(slot, ASI_DTLB_DATA_ACCESS_REG); 292 data = ldxa(slot, ASI_DTLB_DATA_ACCESS_REG); 293 intr_restore(s); 294 return (data); 295} 296 297/* 298 * Bootstrap the system enough to run with virtual memory. 299 */ 300void 301pmap_bootstrap(u_int cpu_impl) 302{ 303 struct pmap *pm; 304 struct tte *tp; 305 vm_offset_t off; 306 vm_offset_t va; 307 vm_paddr_t pa; 308 vm_size_t physsz; 309 vm_size_t virtsz; 310 u_long data; 311 u_long vpn; 312 phandle_t pmem; 313 phandle_t vmem; 314 u_int dtlb_slots_avail; 315 int i; 316 int j; 317 int sz; 318 uint32_t asi; 319 uint32_t colors; 320 uint32_t ldd; 321 322 /* 323 * Set the kernel context. 324 */ 325 pmap_set_kctx(); 326 327 colors = dcache_color_ignore != 0 ? 1 : DCACHE_COLORS; 328 329 /* 330 * Find out what physical memory is available from the PROM and 331 * initialize the phys_avail array. This must be done before 332 * pmap_bootstrap_alloc is called. 333 */ 334 if ((pmem = OF_finddevice("/memory")) == -1) 335 OF_panic("%s: finddevice /memory", __func__); 336 if ((sz = OF_getproplen(pmem, "available")) == -1) 337 OF_panic("%s: getproplen /memory/available", __func__); 338 if (sizeof(phys_avail) < sz) 339 OF_panic("%s: phys_avail too small", __func__); 340 if (sizeof(mra) < sz) 341 OF_panic("%s: mra too small", __func__); 342 bzero(mra, sz); 343 if (OF_getprop(pmem, "available", mra, sz) == -1) 344 OF_panic("%s: getprop /memory/available", __func__); 345 sz /= sizeof(*mra); 346 CTR0(KTR_PMAP, "pmap_bootstrap: physical memory"); 347 qsort(mra, sz, sizeof (*mra), mr_cmp); 348 physsz = 0; 349 getenv_quad("hw.physmem", &physmem); 350 physmem = btoc(physmem); 351 for (i = 0, j = 0; i < sz; i++, j += 2) { 352 CTR2(KTR_PMAP, "start=%#lx size=%#lx", mra[i].mr_start, 353 mra[i].mr_size); 354 if (physmem != 0 && btoc(physsz + mra[i].mr_size) >= physmem) { 355 if (btoc(physsz) < physmem) { 356 phys_avail[j] = mra[i].mr_start; 357 phys_avail[j + 1] = mra[i].mr_start + 358 (ctob(physmem) - physsz); 359 physsz = ctob(physmem); 360 } 361 break; 362 } 363 phys_avail[j] = mra[i].mr_start; 364 phys_avail[j + 1] = mra[i].mr_start + mra[i].mr_size; 365 physsz += mra[i].mr_size; 366 } 367 physmem = btoc(physsz); 368 369 /* 370 * Calculate the size of kernel virtual memory, and the size and mask 371 * for the kernel TSB based on the phsyical memory size but limited 372 * by the amount of dTLB slots available for locked entries if we have 373 * to lock the TSB in the TLB (given that for spitfire-class CPUs all 374 * of the dt64 slots can hold locked entries but there is no large 375 * dTLB for unlocked ones, we don't use more than half of it for the 376 * TSB). 377 * Note that for reasons unknown OpenSolaris doesn't take advantage of 378 * ASI_ATOMIC_QUAD_LDD_PHYS on UltraSPARC-III. However, given that no 379 * public documentation is available for these, the latter just might 380 * not support it, yet. 381 */ 382 if (cpu_impl == CPU_IMPL_SPARC64V || 383 cpu_impl >= CPU_IMPL_ULTRASPARCIIIp) { 384 tsb_kernel_ldd_phys = 1; 385 virtsz = roundup(5 / 3 * physsz, PAGE_SIZE_4M << 386 (PAGE_SHIFT - TTE_SHIFT)); 387 } else { 388 dtlb_slots_avail = 0; 389 for (i = 0; i < dtlb_slots; i++) { 390 data = dtlb_get_data(cpu_impl == 391 CPU_IMPL_ULTRASPARCIII ? TLB_DAR_T16 : 392 TLB_DAR_T32, i); 393 if ((data & (TD_V | TD_L)) != (TD_V | TD_L)) 394 dtlb_slots_avail++; 395 } 396#ifdef SMP 397 dtlb_slots_avail -= PCPU_PAGES; 398#endif 399 if (cpu_impl >= CPU_IMPL_ULTRASPARCI && 400 cpu_impl < CPU_IMPL_ULTRASPARCIII) 401 dtlb_slots_avail /= 2; 402 virtsz = roundup(physsz, PAGE_SIZE_4M << 403 (PAGE_SHIFT - TTE_SHIFT)); 404 virtsz = MIN(virtsz, (dtlb_slots_avail * PAGE_SIZE_4M) << 405 (PAGE_SHIFT - TTE_SHIFT)); 406 } 407 vm_max_kernel_address = VM_MIN_KERNEL_ADDRESS + virtsz; 408 tsb_kernel_size = virtsz >> (PAGE_SHIFT - TTE_SHIFT); 409 tsb_kernel_mask = (tsb_kernel_size >> TTE_SHIFT) - 1; 410 411 /* 412 * Allocate the kernel TSB and lock it in the TLB if necessary. 413 */ 414 pa = pmap_bootstrap_alloc(tsb_kernel_size, colors); 415 if (pa & PAGE_MASK_4M) 416 OF_panic("%s: TSB unaligned", __func__); 417 tsb_kernel_phys = pa; 418 if (tsb_kernel_ldd_phys == 0) { 419 tsb_kernel = 420 (struct tte *)(VM_MIN_KERNEL_ADDRESS - tsb_kernel_size); 421 pmap_map_tsb(); 422 bzero(tsb_kernel, tsb_kernel_size); 423 } else { 424 tsb_kernel = 425 (struct tte *)TLB_PHYS_TO_DIRECT(tsb_kernel_phys); 426 aszero(ASI_PHYS_USE_EC, tsb_kernel_phys, tsb_kernel_size); 427 } 428 429 /* 430 * Allocate and map the dynamic per-CPU area for the BSP. 431 */ 432 pa = pmap_bootstrap_alloc(DPCPU_SIZE, colors); 433 dpcpu0 = (void *)TLB_PHYS_TO_DIRECT(pa); 434 435 /* 436 * Allocate and map the message buffer. 437 */ 438 pa = pmap_bootstrap_alloc(msgbufsize, colors); 439 msgbufp = (struct msgbuf *)TLB_PHYS_TO_DIRECT(pa); 440 441 /* 442 * Patch the TSB addresses and mask as well as the ASIs used to load 443 * it into the trap table. 444 */ 445 446#define LDDA_R_I_R(rd, imm_asi, rs1, rs2) \ 447 (EIF_OP(IOP_LDST) | EIF_F3_RD(rd) | EIF_F3_OP3(INS3_LDDA) | \ 448 EIF_F3_RS1(rs1) | EIF_F3_I(0) | EIF_F3_IMM_ASI(imm_asi) | \ 449 EIF_F3_RS2(rs2)) 450#define OR_R_I_R(rd, imm13, rs1) \ 451 (EIF_OP(IOP_MISC) | EIF_F3_RD(rd) | EIF_F3_OP3(INS2_OR) | \ 452 EIF_F3_RS1(rs1) | EIF_F3_I(1) | EIF_IMM(imm13, 13)) 453#define SETHI(rd, imm22) \ 454 (EIF_OP(IOP_FORM2) | EIF_F2_RD(rd) | EIF_F2_OP2(INS0_SETHI) | \ 455 EIF_IMM((imm22) >> 10, 22)) 456#define WR_R_I(rd, imm13, rs1) \ 457 (EIF_OP(IOP_MISC) | EIF_F3_RD(rd) | EIF_F3_OP3(INS2_WR) | \ 458 EIF_F3_RS1(rs1) | EIF_F3_I(1) | EIF_IMM(imm13, 13)) 459 460#define PATCH_ASI(addr, asi) do { \ 461 if (addr[0] != WR_R_I(IF_F3_RD(addr[0]), 0x0, \ 462 IF_F3_RS1(addr[0]))) \ 463 OF_panic("%s: patched instructions have changed", \ 464 __func__); \ 465 addr[0] |= EIF_IMM((asi), 13); \ 466 flush(addr); \ 467} while (0) 468 469#define PATCH_LDD(addr, asi) do { \ 470 if (addr[0] != LDDA_R_I_R(IF_F3_RD(addr[0]), 0x0, \ 471 IF_F3_RS1(addr[0]), IF_F3_RS2(addr[0]))) \ 472 OF_panic("%s: patched instructions have changed", \ 473 __func__); \ 474 addr[0] |= EIF_F3_IMM_ASI(asi); \ 475 flush(addr); \ 476} while (0) 477 478#define PATCH_TSB(addr, val) do { \ 479 if (addr[0] != SETHI(IF_F2_RD(addr[0]), 0x0) || \ 480 addr[1] != OR_R_I_R(IF_F3_RD(addr[1]), 0x0, \ 481 IF_F3_RS1(addr[1])) || \ 482 addr[3] != SETHI(IF_F2_RD(addr[3]), 0x0)) \ 483 OF_panic("%s: patched instructions have changed", \ 484 __func__); \ 485 addr[0] |= EIF_IMM((val) >> 42, 22); \ 486 addr[1] |= EIF_IMM((val) >> 32, 10); \ 487 addr[3] |= EIF_IMM((val) >> 10, 22); \ 488 flush(addr); \ 489 flush(addr + 1); \ 490 flush(addr + 3); \ 491} while (0) 492 493#define PATCH_TSB_MASK(addr, val) do { \ 494 if (addr[0] != SETHI(IF_F2_RD(addr[0]), 0x0) || \ 495 addr[1] != OR_R_I_R(IF_F3_RD(addr[1]), 0x0, \ 496 IF_F3_RS1(addr[1]))) \ 497 OF_panic("%s: patched instructions have changed", \ 498 __func__); \ 499 addr[0] |= EIF_IMM((val) >> 10, 22); \ 500 addr[1] |= EIF_IMM((val), 10); \ 501 flush(addr); \ 502 flush(addr + 1); \ 503} while (0) 504 505 if (tsb_kernel_ldd_phys == 0) { 506 asi = ASI_N; 507 ldd = ASI_NUCLEUS_QUAD_LDD; 508 off = (vm_offset_t)tsb_kernel; 509 } else { 510 asi = ASI_PHYS_USE_EC; 511 ldd = ASI_ATOMIC_QUAD_LDD_PHYS; 512 off = (vm_offset_t)tsb_kernel_phys; 513 } 514 PATCH_TSB(tl1_dmmu_miss_direct_patch_tsb_phys_1, tsb_kernel_phys); 515 PATCH_TSB(tl1_dmmu_miss_direct_patch_tsb_phys_end_1, 516 tsb_kernel_phys + tsb_kernel_size - 1); 517 PATCH_ASI(tl1_dmmu_miss_patch_asi_1, asi); 518 PATCH_LDD(tl1_dmmu_miss_patch_quad_ldd_1, ldd); 519 PATCH_TSB(tl1_dmmu_miss_patch_tsb_1, off); 520 PATCH_TSB(tl1_dmmu_miss_patch_tsb_2, off); 521 PATCH_TSB_MASK(tl1_dmmu_miss_patch_tsb_mask_1, tsb_kernel_mask); 522 PATCH_TSB_MASK(tl1_dmmu_miss_patch_tsb_mask_2, tsb_kernel_mask); 523 PATCH_ASI(tl1_dmmu_prot_patch_asi_1, asi); 524 PATCH_LDD(tl1_dmmu_prot_patch_quad_ldd_1, ldd); 525 PATCH_TSB(tl1_dmmu_prot_patch_tsb_1, off); 526 PATCH_TSB(tl1_dmmu_prot_patch_tsb_2, off); 527 PATCH_TSB_MASK(tl1_dmmu_prot_patch_tsb_mask_1, tsb_kernel_mask); 528 PATCH_TSB_MASK(tl1_dmmu_prot_patch_tsb_mask_2, tsb_kernel_mask); 529 PATCH_ASI(tl1_immu_miss_patch_asi_1, asi); 530 PATCH_LDD(tl1_immu_miss_patch_quad_ldd_1, ldd); 531 PATCH_TSB(tl1_immu_miss_patch_tsb_1, off); 532 PATCH_TSB(tl1_immu_miss_patch_tsb_2, off); 533 PATCH_TSB_MASK(tl1_immu_miss_patch_tsb_mask_1, tsb_kernel_mask); 534 PATCH_TSB_MASK(tl1_immu_miss_patch_tsb_mask_2, tsb_kernel_mask); 535 536 /* 537 * Enter fake 8k pages for the 4MB kernel pages, so that 538 * pmap_kextract() will work for them. 539 */ 540 for (i = 0; i < kernel_tlb_slots; i++) { 541 pa = kernel_tlbs[i].te_pa; 542 va = kernel_tlbs[i].te_va; 543 for (off = 0; off < PAGE_SIZE_4M; off += PAGE_SIZE) { 544 tp = tsb_kvtotte(va + off); 545 vpn = TV_VPN(va + off, TS_8K); 546 data = TD_V | TD_8K | TD_PA(pa + off) | TD_REF | 547 TD_SW | TD_CP | TD_CV | TD_P | TD_W; 548 pmap_bootstrap_set_tte(tp, vpn, data); 549 } 550 } 551 552 /* 553 * Set the start and end of KVA. The kernel is loaded starting 554 * at the first available 4MB super page, so we advance to the 555 * end of the last one used for it. 556 */ 557 virtual_avail = KERNBASE + kernel_tlb_slots * PAGE_SIZE_4M; 558 virtual_end = vm_max_kernel_address; 559 kernel_vm_end = vm_max_kernel_address; 560 561 /* 562 * Allocate kva space for temporary mappings. 563 */ 564 pmap_idle_map = virtual_avail; 565 virtual_avail += PAGE_SIZE * colors; 566 pmap_temp_map_1 = virtual_avail; 567 virtual_avail += PAGE_SIZE * colors; 568 pmap_temp_map_2 = virtual_avail; 569 virtual_avail += PAGE_SIZE * colors; 570 571 /* 572 * Allocate a kernel stack with guard page for thread0 and map it 573 * into the kernel TSB. We must ensure that the virtual address is 574 * colored properly for corresponding CPUs, since we're allocating 575 * from phys_avail so the memory won't have an associated vm_page_t. 576 */ 577 pa = pmap_bootstrap_alloc(KSTACK_PAGES * PAGE_SIZE, colors); 578 kstack0_phys = pa; 579 virtual_avail += roundup(KSTACK_GUARD_PAGES, colors) * PAGE_SIZE; 580 kstack0 = virtual_avail; 581 virtual_avail += roundup(KSTACK_PAGES, colors) * PAGE_SIZE; 582 if (dcache_color_ignore == 0) 583 KASSERT(DCACHE_COLOR(kstack0) == DCACHE_COLOR(kstack0_phys), 584 ("pmap_bootstrap: kstack0 miscolored")); 585 for (i = 0; i < KSTACK_PAGES; i++) { 586 pa = kstack0_phys + i * PAGE_SIZE; 587 va = kstack0 + i * PAGE_SIZE; 588 tp = tsb_kvtotte(va); 589 vpn = TV_VPN(va, TS_8K); 590 data = TD_V | TD_8K | TD_PA(pa) | TD_REF | TD_SW | TD_CP | 591 TD_CV | TD_P | TD_W; 592 pmap_bootstrap_set_tte(tp, vpn, data); 593 } 594 595 /* 596 * Calculate the last available physical address. 597 */ 598 for (i = 0; phys_avail[i + 2] != 0; i += 2) 599 ; 600 Maxmem = sparc64_btop(phys_avail[i + 1]); 601 602 /* 603 * Add the PROM mappings to the kernel TSB. 604 */ 605 if ((vmem = OF_finddevice("/virtual-memory")) == -1) 606 OF_panic("%s: finddevice /virtual-memory", __func__); 607 if ((sz = OF_getproplen(vmem, "translations")) == -1) 608 OF_panic("%s: getproplen translations", __func__); 609 if (sizeof(translations) < sz) 610 OF_panic("%s: translations too small", __func__); 611 bzero(translations, sz); 612 if (OF_getprop(vmem, "translations", translations, sz) == -1) 613 OF_panic("%s: getprop /virtual-memory/translations", 614 __func__); 615 sz /= sizeof(*translations); 616 translations_size = sz; 617 CTR0(KTR_PMAP, "pmap_bootstrap: translations"); 618 qsort(translations, sz, sizeof (*translations), om_cmp); 619 for (i = 0; i < sz; i++) { 620 CTR3(KTR_PMAP, 621 "translation: start=%#lx size=%#lx tte=%#lx", 622 translations[i].om_start, translations[i].om_size, 623 translations[i].om_tte); 624 if ((translations[i].om_tte & TD_V) == 0) 625 continue; 626 if (translations[i].om_start < VM_MIN_PROM_ADDRESS || 627 translations[i].om_start > VM_MAX_PROM_ADDRESS) 628 continue; 629 for (off = 0; off < translations[i].om_size; 630 off += PAGE_SIZE) { 631 va = translations[i].om_start + off; 632 tp = tsb_kvtotte(va); 633 vpn = TV_VPN(va, TS_8K); 634 data = ((translations[i].om_tte & 635 ~((TD_SOFT2_MASK << TD_SOFT2_SHIFT) | 636 (cpu_impl >= CPU_IMPL_ULTRASPARCI && 637 cpu_impl < CPU_IMPL_ULTRASPARCIII ? 638 (TD_DIAG_SF_MASK << TD_DIAG_SF_SHIFT) : 639 (TD_RSVD_CH_MASK << TD_RSVD_CH_SHIFT)) | 640 (TD_SOFT_MASK << TD_SOFT_SHIFT))) | TD_EXEC) + 641 off; 642 pmap_bootstrap_set_tte(tp, vpn, data); 643 } 644 } 645 646 /* 647 * Get the available physical memory ranges from /memory/reg. These 648 * are only used for kernel dumps, but it may not be wise to do PROM 649 * calls in that situation. 650 */ 651 if ((sz = OF_getproplen(pmem, "reg")) == -1) 652 OF_panic("%s: getproplen /memory/reg", __func__); 653 if (sizeof(sparc64_memreg) < sz) 654 OF_panic("%s: sparc64_memreg too small", __func__); 655 if (OF_getprop(pmem, "reg", sparc64_memreg, sz) == -1) 656 OF_panic("%s: getprop /memory/reg", __func__); 657 sparc64_nmemreg = sz / sizeof(*sparc64_memreg); 658 659 /* 660 * Initialize the kernel pmap (which is statically allocated). 661 */ 662 pm = kernel_pmap; 663 PMAP_LOCK_INIT(pm); 664 for (i = 0; i < MAXCPU; i++) 665 pm->pm_context[i] = TLB_CTX_KERNEL; 666 CPU_FILL(&pm->pm_active); 667 668 /* 669 * Initialize the global tte list lock, which is more commonly 670 * known as the pmap pv global lock. 671 */ 672 rw_init(&tte_list_global_lock, "pmap pv global"); 673 674 /* 675 * Flush all non-locked TLB entries possibly left over by the 676 * firmware. 677 */ 678 tlb_flush_nonlocked(); 679} 680 681/* 682 * Map the 4MB kernel TSB pages. 683 */ 684void 685pmap_map_tsb(void) 686{ 687 vm_offset_t va; 688 vm_paddr_t pa; 689 u_long data; 690 int i; 691 692 for (i = 0; i < tsb_kernel_size; i += PAGE_SIZE_4M) { 693 va = (vm_offset_t)tsb_kernel + i; 694 pa = tsb_kernel_phys + i; 695 data = TD_V | TD_4M | TD_PA(pa) | TD_L | TD_CP | TD_CV | 696 TD_P | TD_W; 697 stxa(AA_DMMU_TAR, ASI_DMMU, TLB_TAR_VA(va) | 698 TLB_TAR_CTX(TLB_CTX_KERNEL)); 699 stxa_sync(0, ASI_DTLB_DATA_IN_REG, data); 700 } 701} 702 703/* 704 * Set the secondary context to be the kernel context (needed for FP block 705 * operations in the kernel). 706 */ 707void 708pmap_set_kctx(void) 709{ 710 711 stxa(AA_DMMU_SCXR, ASI_DMMU, (ldxa(AA_DMMU_SCXR, ASI_DMMU) & 712 TLB_CXR_PGSZ_MASK) | TLB_CTX_KERNEL); 713 flush(KERNBASE); 714} 715 716/* 717 * Allocate a physical page of memory directly from the phys_avail map. 718 * Can only be called from pmap_bootstrap before avail start and end are 719 * calculated. 720 */ 721static vm_paddr_t 722pmap_bootstrap_alloc(vm_size_t size, uint32_t colors) 723{ 724 vm_paddr_t pa; 725 int i; 726 727 size = roundup(size, PAGE_SIZE * colors); 728 for (i = 0; phys_avail[i + 1] != 0; i += 2) { 729 if (phys_avail[i + 1] - phys_avail[i] < size) 730 continue; 731 pa = phys_avail[i]; 732 phys_avail[i] += size; 733 return (pa); 734 } 735 OF_panic("%s: no suitable region found", __func__); 736} 737 738/* 739 * Set a TTE. This function is intended as a helper when tsb_kernel is 740 * direct-mapped but we haven't taken over the trap table, yet, as it's the 741 * case when we are taking advantage of ASI_ATOMIC_QUAD_LDD_PHYS to access 742 * the kernel TSB. 743 */ 744void 745pmap_bootstrap_set_tte(struct tte *tp, u_long vpn, u_long data) 746{ 747 748 if (tsb_kernel_ldd_phys == 0) { 749 tp->tte_vpn = vpn; 750 tp->tte_data = data; 751 } else { 752 stxa((vm_paddr_t)tp + offsetof(struct tte, tte_vpn), 753 ASI_PHYS_USE_EC, vpn); 754 stxa((vm_paddr_t)tp + offsetof(struct tte, tte_data), 755 ASI_PHYS_USE_EC, data); 756 } 757} 758 759/* 760 * Initialize a vm_page's machine-dependent fields. 761 */ 762void 763pmap_page_init(vm_page_t m) 764{ 765 766 TAILQ_INIT(&m->md.tte_list); 767 m->md.color = DCACHE_COLOR(VM_PAGE_TO_PHYS(m)); 768 m->md.pmap = NULL; 769} 770 771/* 772 * Initialize the pmap module. 773 */ 774void 775pmap_init(void) 776{ 777 vm_offset_t addr; 778 vm_size_t size; 779 int result; 780 int i; 781 782 for (i = 0; i < translations_size; i++) { 783 addr = translations[i].om_start; 784 size = translations[i].om_size; 785 if ((translations[i].om_tte & TD_V) == 0) 786 continue; 787 if (addr < VM_MIN_PROM_ADDRESS || addr > VM_MAX_PROM_ADDRESS) 788 continue; 789 result = vm_map_find(kernel_map, NULL, 0, &addr, size, 0, 790 VMFS_NO_SPACE, VM_PROT_ALL, VM_PROT_ALL, MAP_NOFAULT); 791 if (result != KERN_SUCCESS || addr != translations[i].om_start) 792 panic("pmap_init: vm_map_find"); 793 } 794} 795 796/* 797 * Extract the physical page address associated with the given 798 * map/virtual_address pair. 799 */ 800vm_paddr_t 801pmap_extract(pmap_t pm, vm_offset_t va) 802{ 803 struct tte *tp; 804 vm_paddr_t pa; 805 806 if (pm == kernel_pmap) 807 return (pmap_kextract(va)); 808 PMAP_LOCK(pm); 809 tp = tsb_tte_lookup(pm, va); 810 if (tp == NULL) 811 pa = 0; 812 else 813 pa = TTE_GET_PA(tp) | (va & TTE_GET_PAGE_MASK(tp)); 814 PMAP_UNLOCK(pm); 815 return (pa); 816} 817 818/* 819 * Atomically extract and hold the physical page with the given 820 * pmap and virtual address pair if that mapping permits the given 821 * protection. 822 */ 823vm_page_t 824pmap_extract_and_hold(pmap_t pm, vm_offset_t va, vm_prot_t prot) 825{ 826 struct tte *tp; 827 vm_page_t m; 828 vm_paddr_t pa; 829 830 m = NULL; 831 pa = 0; 832 PMAP_LOCK(pm); 833retry: 834 if (pm == kernel_pmap) { 835 if (va >= VM_MIN_DIRECT_ADDRESS) { 836 tp = NULL; 837 m = PHYS_TO_VM_PAGE(TLB_DIRECT_TO_PHYS(va)); 838 (void)vm_page_pa_tryrelock(pm, TLB_DIRECT_TO_PHYS(va), 839 &pa); 840 vm_page_hold(m); 841 } else { 842 tp = tsb_kvtotte(va); 843 if ((tp->tte_data & TD_V) == 0) 844 tp = NULL; 845 } 846 } else 847 tp = tsb_tte_lookup(pm, va); 848 if (tp != NULL && ((tp->tte_data & TD_SW) || 849 (prot & VM_PROT_WRITE) == 0)) { 850 if (vm_page_pa_tryrelock(pm, TTE_GET_PA(tp), &pa)) 851 goto retry; 852 m = PHYS_TO_VM_PAGE(TTE_GET_PA(tp)); 853 vm_page_hold(m); 854 } 855 PA_UNLOCK_COND(pa); 856 PMAP_UNLOCK(pm); 857 return (m); 858} 859 860/* 861 * Extract the physical page address associated with the given kernel virtual 862 * address. 863 */ 864vm_paddr_t 865pmap_kextract(vm_offset_t va) 866{ 867 struct tte *tp; 868 869 if (va >= VM_MIN_DIRECT_ADDRESS) 870 return (TLB_DIRECT_TO_PHYS(va)); 871 tp = tsb_kvtotte(va); 872 if ((tp->tte_data & TD_V) == 0) 873 return (0); 874 return (TTE_GET_PA(tp) | (va & TTE_GET_PAGE_MASK(tp))); 875} 876 877int 878pmap_cache_enter(vm_page_t m, vm_offset_t va) 879{ 880 struct tte *tp; 881 int color; 882 883 rw_assert(&tte_list_global_lock, RA_WLOCKED); 884 KASSERT((m->flags & PG_FICTITIOUS) == 0, 885 ("pmap_cache_enter: fake page")); 886 PMAP_STATS_INC(pmap_ncache_enter); 887 888 if (dcache_color_ignore != 0) 889 return (1); 890 891 /* 892 * Find the color for this virtual address and note the added mapping. 893 */ 894 color = DCACHE_COLOR(va); 895 m->md.colors[color]++; 896 897 /* 898 * If all existing mappings have the same color, the mapping is 899 * cacheable. 900 */ 901 if (m->md.color == color) { 902 KASSERT(m->md.colors[DCACHE_OTHER_COLOR(color)] == 0, 903 ("pmap_cache_enter: cacheable, mappings of other color")); 904 if (m->md.color == DCACHE_COLOR(VM_PAGE_TO_PHYS(m))) 905 PMAP_STATS_INC(pmap_ncache_enter_c); 906 else 907 PMAP_STATS_INC(pmap_ncache_enter_oc); 908 return (1); 909 } 910 911 /* 912 * If there are no mappings of the other color, and the page still has 913 * the wrong color, this must be a new mapping. Change the color to 914 * match the new mapping, which is cacheable. We must flush the page 915 * from the cache now. 916 */ 917 if (m->md.colors[DCACHE_OTHER_COLOR(color)] == 0) { 918 KASSERT(m->md.colors[color] == 1, 919 ("pmap_cache_enter: changing color, not new mapping")); 920 dcache_page_inval(VM_PAGE_TO_PHYS(m)); 921 m->md.color = color; 922 if (m->md.color == DCACHE_COLOR(VM_PAGE_TO_PHYS(m))) 923 PMAP_STATS_INC(pmap_ncache_enter_cc); 924 else 925 PMAP_STATS_INC(pmap_ncache_enter_coc); 926 return (1); 927 } 928 929 /* 930 * If the mapping is already non-cacheable, just return. 931 */ 932 if (m->md.color == -1) { 933 PMAP_STATS_INC(pmap_ncache_enter_nc); 934 return (0); 935 } 936 937 PMAP_STATS_INC(pmap_ncache_enter_cnc); 938 939 /* 940 * Mark all mappings as uncacheable, flush any lines with the other 941 * color out of the dcache, and set the color to none (-1). 942 */ 943 TAILQ_FOREACH(tp, &m->md.tte_list, tte_link) { 944 atomic_clear_long(&tp->tte_data, TD_CV); 945 tlb_page_demap(TTE_GET_PMAP(tp), TTE_GET_VA(tp)); 946 } 947 dcache_page_inval(VM_PAGE_TO_PHYS(m)); 948 m->md.color = -1; 949 return (0); 950} 951 952static void 953pmap_cache_remove(vm_page_t m, vm_offset_t va) 954{ 955 struct tte *tp; 956 int color; 957 958 rw_assert(&tte_list_global_lock, RA_WLOCKED); 959 CTR3(KTR_PMAP, "pmap_cache_remove: m=%p va=%#lx c=%d", m, va, 960 m->md.colors[DCACHE_COLOR(va)]); 961 KASSERT((m->flags & PG_FICTITIOUS) == 0, 962 ("pmap_cache_remove: fake page")); 963 PMAP_STATS_INC(pmap_ncache_remove); 964 965 if (dcache_color_ignore != 0) 966 return; 967 968 KASSERT(m->md.colors[DCACHE_COLOR(va)] > 0, 969 ("pmap_cache_remove: no mappings %d <= 0", 970 m->md.colors[DCACHE_COLOR(va)])); 971 972 /* 973 * Find the color for this virtual address and note the removal of 974 * the mapping. 975 */ 976 color = DCACHE_COLOR(va); 977 m->md.colors[color]--; 978 979 /* 980 * If the page is cacheable, just return and keep the same color, even 981 * if there are no longer any mappings. 982 */ 983 if (m->md.color != -1) { 984 if (m->md.color == DCACHE_COLOR(VM_PAGE_TO_PHYS(m))) 985 PMAP_STATS_INC(pmap_ncache_remove_c); 986 else 987 PMAP_STATS_INC(pmap_ncache_remove_oc); 988 return; 989 } 990 991 KASSERT(m->md.colors[DCACHE_OTHER_COLOR(color)] != 0, 992 ("pmap_cache_remove: uncacheable, no mappings of other color")); 993 994 /* 995 * If the page is not cacheable (color is -1), and the number of 996 * mappings for this color is not zero, just return. There are 997 * mappings of the other color still, so remain non-cacheable. 998 */ 999 if (m->md.colors[color] != 0) { 1000 PMAP_STATS_INC(pmap_ncache_remove_nc); 1001 return; 1002 } 1003 1004 /* 1005 * The number of mappings for this color is now zero. Recache the 1006 * other colored mappings, and change the page color to the other 1007 * color. There should be no lines in the data cache for this page, 1008 * so flushing should not be needed. 1009 */ 1010 TAILQ_FOREACH(tp, &m->md.tte_list, tte_link) { 1011 atomic_set_long(&tp->tte_data, TD_CV); 1012 tlb_page_demap(TTE_GET_PMAP(tp), TTE_GET_VA(tp)); 1013 } 1014 m->md.color = DCACHE_OTHER_COLOR(color); 1015 1016 if (m->md.color == DCACHE_COLOR(VM_PAGE_TO_PHYS(m))) 1017 PMAP_STATS_INC(pmap_ncache_remove_cc); 1018 else 1019 PMAP_STATS_INC(pmap_ncache_remove_coc); 1020} 1021 1022/* 1023 * Map a wired page into kernel virtual address space. 1024 */ 1025void 1026pmap_kenter(vm_offset_t va, vm_page_t m) 1027{ 1028 vm_offset_t ova; 1029 struct tte *tp; 1030 vm_page_t om; 1031 u_long data; 1032 1033 rw_assert(&tte_list_global_lock, RA_WLOCKED); 1034 PMAP_STATS_INC(pmap_nkenter); 1035 tp = tsb_kvtotte(va); 1036 CTR4(KTR_PMAP, "pmap_kenter: va=%#lx pa=%#lx tp=%p data=%#lx", 1037 va, VM_PAGE_TO_PHYS(m), tp, tp->tte_data); 1038 if (DCACHE_COLOR(VM_PAGE_TO_PHYS(m)) != DCACHE_COLOR(va)) { 1039 CTR5(KTR_SPARE2, 1040 "pmap_kenter: off color va=%#lx pa=%#lx o=%p ot=%d pi=%#lx", 1041 va, VM_PAGE_TO_PHYS(m), m->object, 1042 m->object ? m->object->type : -1, 1043 m->pindex); 1044 PMAP_STATS_INC(pmap_nkenter_oc); 1045 } 1046 if ((tp->tte_data & TD_V) != 0) { 1047 om = PHYS_TO_VM_PAGE(TTE_GET_PA(tp)); 1048 ova = TTE_GET_VA(tp); 1049 if (m == om && va == ova) { 1050 PMAP_STATS_INC(pmap_nkenter_stupid); 1051 return; 1052 } 1053 TAILQ_REMOVE(&om->md.tte_list, tp, tte_link); 1054 pmap_cache_remove(om, ova); 1055 if (va != ova) 1056 tlb_page_demap(kernel_pmap, ova); 1057 } 1058 data = TD_V | TD_8K | VM_PAGE_TO_PHYS(m) | TD_REF | TD_SW | TD_CP | 1059 TD_P | TD_W; 1060 if (pmap_cache_enter(m, va) != 0) 1061 data |= TD_CV; 1062 tp->tte_vpn = TV_VPN(va, TS_8K); 1063 tp->tte_data = data; 1064 TAILQ_INSERT_TAIL(&m->md.tte_list, tp, tte_link); 1065} 1066 1067/* 1068 * Map a wired page into kernel virtual address space. This additionally 1069 * takes a flag argument which is or'ed to the TTE data. This is used by 1070 * sparc64_bus_mem_map(). 1071 * NOTE: if the mapping is non-cacheable, it's the caller's responsibility 1072 * to flush entries that might still be in the cache, if applicable. 1073 */ 1074void 1075pmap_kenter_flags(vm_offset_t va, vm_paddr_t pa, u_long flags) 1076{ 1077 struct tte *tp; 1078 1079 tp = tsb_kvtotte(va); 1080 CTR4(KTR_PMAP, "pmap_kenter_flags: va=%#lx pa=%#lx tp=%p data=%#lx", 1081 va, pa, tp, tp->tte_data); 1082 tp->tte_vpn = TV_VPN(va, TS_8K); 1083 tp->tte_data = TD_V | TD_8K | TD_PA(pa) | TD_REF | TD_P | flags; 1084} 1085 1086/* 1087 * Remove a wired page from kernel virtual address space. 1088 */ 1089void 1090pmap_kremove(vm_offset_t va) 1091{ 1092 struct tte *tp; 1093 vm_page_t m; 1094 1095 rw_assert(&tte_list_global_lock, RA_WLOCKED); 1096 PMAP_STATS_INC(pmap_nkremove); 1097 tp = tsb_kvtotte(va); 1098 CTR3(KTR_PMAP, "pmap_kremove: va=%#lx tp=%p data=%#lx", va, tp, 1099 tp->tte_data); 1100 if ((tp->tte_data & TD_V) == 0) 1101 return; 1102 m = PHYS_TO_VM_PAGE(TTE_GET_PA(tp)); 1103 TAILQ_REMOVE(&m->md.tte_list, tp, tte_link); 1104 pmap_cache_remove(m, va); 1105 TTE_ZERO(tp); 1106} 1107 1108/* 1109 * Inverse of pmap_kenter_flags, used by bus_space_unmap(). 1110 */ 1111void 1112pmap_kremove_flags(vm_offset_t va) 1113{ 1114 struct tte *tp; 1115 1116 tp = tsb_kvtotte(va); 1117 CTR3(KTR_PMAP, "pmap_kremove_flags: va=%#lx tp=%p data=%#lx", va, tp, 1118 tp->tte_data); 1119 TTE_ZERO(tp); 1120} 1121 1122/* 1123 * Map a range of physical addresses into kernel virtual address space. 1124 * 1125 * The value passed in *virt is a suggested virtual address for the mapping. 1126 * Architectures which can support a direct-mapped physical to virtual region 1127 * can return the appropriate address within that region, leaving '*virt' 1128 * unchanged. 1129 */ 1130vm_offset_t 1131pmap_map(vm_offset_t *virt, vm_paddr_t start, vm_paddr_t end, int prot) 1132{ 1133 1134 return (TLB_PHYS_TO_DIRECT(start)); 1135} 1136 1137/* 1138 * Map a list of wired pages into kernel virtual address space. This is 1139 * intended for temporary mappings which do not need page modification or 1140 * references recorded. Existing mappings in the region are overwritten. 1141 */ 1142void 1143pmap_qenter(vm_offset_t sva, vm_page_t *m, int count) 1144{ 1145 vm_offset_t va; 1146 1147 PMAP_STATS_INC(pmap_nqenter); 1148 va = sva; 1149 rw_wlock(&tte_list_global_lock); 1150 while (count-- > 0) { 1151 pmap_kenter(va, *m); 1152 va += PAGE_SIZE; 1153 m++; 1154 } 1155 rw_wunlock(&tte_list_global_lock); 1156 tlb_range_demap(kernel_pmap, sva, va); 1157} 1158 1159/* 1160 * Remove page mappings from kernel virtual address space. Intended for 1161 * temporary mappings entered by pmap_qenter. 1162 */ 1163void 1164pmap_qremove(vm_offset_t sva, int count) 1165{ 1166 vm_offset_t va; 1167 1168 PMAP_STATS_INC(pmap_nqremove); 1169 va = sva; 1170 rw_wlock(&tte_list_global_lock); 1171 while (count-- > 0) { 1172 pmap_kremove(va); 1173 va += PAGE_SIZE; 1174 } 1175 rw_wunlock(&tte_list_global_lock); 1176 tlb_range_demap(kernel_pmap, sva, va); 1177} 1178 1179/* 1180 * Initialize the pmap associated with process 0. 1181 */ 1182void 1183pmap_pinit0(pmap_t pm) 1184{ 1185 int i; 1186 1187 PMAP_LOCK_INIT(pm); 1188 for (i = 0; i < MAXCPU; i++) 1189 pm->pm_context[i] = TLB_CTX_KERNEL; 1190 CPU_ZERO(&pm->pm_active); 1191 pm->pm_tsb = NULL; 1192 pm->pm_tsb_obj = NULL; 1193 bzero(&pm->pm_stats, sizeof(pm->pm_stats)); 1194} 1195 1196/* 1197 * Initialize a preallocated and zeroed pmap structure, such as one in a 1198 * vmspace structure. 1199 */ 1200int 1201pmap_pinit(pmap_t pm) 1202{ 1203 vm_page_t ma[TSB_PAGES]; 1204 vm_page_t m; 1205 int i; 1206 1207 /* 1208 * Allocate KVA space for the TSB. 1209 */ 1210 if (pm->pm_tsb == NULL) { 1211 pm->pm_tsb = (struct tte *)kva_alloc(TSB_BSIZE); 1212 if (pm->pm_tsb == NULL) { 1213 PMAP_LOCK_DESTROY(pm); 1214 return (0); 1215 } 1216 } 1217 1218 /* 1219 * Allocate an object for it. 1220 */ 1221 if (pm->pm_tsb_obj == NULL) 1222 pm->pm_tsb_obj = vm_object_allocate(OBJT_PHYS, TSB_PAGES); 1223 1224 for (i = 0; i < MAXCPU; i++) 1225 pm->pm_context[i] = -1; 1226 CPU_ZERO(&pm->pm_active); 1227 1228 VM_OBJECT_WLOCK(pm->pm_tsb_obj); 1229 for (i = 0; i < TSB_PAGES; i++) { 1230 m = vm_page_grab(pm->pm_tsb_obj, i, VM_ALLOC_NOBUSY | 1231 VM_ALLOC_WIRED | VM_ALLOC_ZERO); 1232 m->valid = VM_PAGE_BITS_ALL; 1233 m->md.pmap = pm; 1234 ma[i] = m; 1235 } 1236 VM_OBJECT_WUNLOCK(pm->pm_tsb_obj); 1237 pmap_qenter((vm_offset_t)pm->pm_tsb, ma, TSB_PAGES); 1238 1239 bzero(&pm->pm_stats, sizeof(pm->pm_stats)); 1240 return (1); 1241} 1242 1243/* 1244 * Release any resources held by the given physical map. 1245 * Called when a pmap initialized by pmap_pinit is being released. 1246 * Should only be called if the map contains no valid mappings. 1247 */ 1248void 1249pmap_release(pmap_t pm) 1250{ 1251 vm_object_t obj; 1252 vm_page_t m; 1253#ifdef SMP 1254 struct pcpu *pc; 1255#endif 1256 1257 CTR2(KTR_PMAP, "pmap_release: ctx=%#x tsb=%p", 1258 pm->pm_context[curcpu], pm->pm_tsb); 1259 KASSERT(pmap_resident_count(pm) == 0, 1260 ("pmap_release: resident pages %ld != 0", 1261 pmap_resident_count(pm))); 1262 1263 /* 1264 * After the pmap was freed, it might be reallocated to a new process. 1265 * When switching, this might lead us to wrongly assume that we need 1266 * not switch contexts because old and new pmap pointer are equal. 1267 * Therefore, make sure that this pmap is not referenced by any PCPU 1268 * pointer any more. This could happen in two cases: 1269 * - A process that referenced the pmap is currently exiting on a CPU. 1270 * However, it is guaranteed to not switch in any more after setting 1271 * its state to PRS_ZOMBIE. 1272 * - A process that referenced this pmap ran on a CPU, but we switched 1273 * to a kernel thread, leaving the pmap pointer unchanged. 1274 */ 1275#ifdef SMP 1276 sched_pin(); 1277 STAILQ_FOREACH(pc, &cpuhead, pc_allcpu) 1278 atomic_cmpset_rel_ptr((uintptr_t *)&pc->pc_pmap, 1279 (uintptr_t)pm, (uintptr_t)NULL); 1280 sched_unpin(); 1281#else 1282 critical_enter(); 1283 if (PCPU_GET(pmap) == pm) 1284 PCPU_SET(pmap, NULL); 1285 critical_exit(); 1286#endif 1287 1288 pmap_qremove((vm_offset_t)pm->pm_tsb, TSB_PAGES); 1289 obj = pm->pm_tsb_obj; 1290 VM_OBJECT_WLOCK(obj); 1291 KASSERT(obj->ref_count == 1, ("pmap_release: tsbobj ref count != 1")); 1292 while (!TAILQ_EMPTY(&obj->memq)) { 1293 m = TAILQ_FIRST(&obj->memq); 1294 m->md.pmap = NULL; 1295 m->wire_count--; 1296 atomic_subtract_int(&cnt.v_wire_count, 1); 1297 vm_page_free_zero(m); 1298 } 1299 VM_OBJECT_WUNLOCK(obj); 1300} 1301 1302/* 1303 * Grow the number of kernel page table entries. Unneeded. 1304 */ 1305void 1306pmap_growkernel(vm_offset_t addr) 1307{ 1308 1309 panic("pmap_growkernel: can't grow kernel"); 1310} 1311 1312int 1313pmap_remove_tte(struct pmap *pm, struct pmap *pm2, struct tte *tp, 1314 vm_offset_t va) 1315{ 1316 vm_page_t m; 1317 u_long data; 1318 1319 rw_assert(&tte_list_global_lock, RA_WLOCKED); 1320 data = atomic_readandclear_long(&tp->tte_data); 1321 if ((data & TD_FAKE) == 0) { 1322 m = PHYS_TO_VM_PAGE(TD_PA(data)); 1323 TAILQ_REMOVE(&m->md.tte_list, tp, tte_link); 1324 if ((data & TD_WIRED) != 0) 1325 pm->pm_stats.wired_count--; 1326 if ((data & TD_PV) != 0) { 1327 if ((data & TD_W) != 0) 1328 vm_page_dirty(m); 1329 if ((data & TD_REF) != 0) 1330 vm_page_aflag_set(m, PGA_REFERENCED); 1331 if (TAILQ_EMPTY(&m->md.tte_list)) 1332 vm_page_aflag_clear(m, PGA_WRITEABLE); 1333 pm->pm_stats.resident_count--; 1334 } 1335 pmap_cache_remove(m, va); 1336 } 1337 TTE_ZERO(tp); 1338 if (PMAP_REMOVE_DONE(pm)) 1339 return (0); 1340 return (1); 1341} 1342 1343/* 1344 * Remove the given range of addresses from the specified map. 1345 */ 1346void 1347pmap_remove(pmap_t pm, vm_offset_t start, vm_offset_t end) 1348{ 1349 struct tte *tp; 1350 vm_offset_t va; 1351 1352 CTR3(KTR_PMAP, "pmap_remove: ctx=%#lx start=%#lx end=%#lx", 1353 pm->pm_context[curcpu], start, end); 1354 if (PMAP_REMOVE_DONE(pm)) 1355 return; 1356 rw_wlock(&tte_list_global_lock); 1357 PMAP_LOCK(pm); 1358 if (end - start > PMAP_TSB_THRESH) { 1359 tsb_foreach(pm, NULL, start, end, pmap_remove_tte); 1360 tlb_context_demap(pm); 1361 } else { 1362 for (va = start; va < end; va += PAGE_SIZE) 1363 if ((tp = tsb_tte_lookup(pm, va)) != NULL && 1364 !pmap_remove_tte(pm, NULL, tp, va)) 1365 break; 1366 tlb_range_demap(pm, start, end - 1); 1367 } 1368 PMAP_UNLOCK(pm); 1369 rw_wunlock(&tte_list_global_lock); 1370} 1371 1372void 1373pmap_remove_all(vm_page_t m) 1374{ 1375 struct pmap *pm; 1376 struct tte *tpn; 1377 struct tte *tp; 1378 vm_offset_t va; 1379 1380 KASSERT((m->oflags & VPO_UNMANAGED) == 0, 1381 ("pmap_remove_all: page %p is not managed", m)); 1382 rw_wlock(&tte_list_global_lock); 1383 for (tp = TAILQ_FIRST(&m->md.tte_list); tp != NULL; tp = tpn) { 1384 tpn = TAILQ_NEXT(tp, tte_link); 1385 if ((tp->tte_data & TD_PV) == 0) 1386 continue; 1387 pm = TTE_GET_PMAP(tp); 1388 va = TTE_GET_VA(tp); 1389 PMAP_LOCK(pm); 1390 if ((tp->tte_data & TD_WIRED) != 0) 1391 pm->pm_stats.wired_count--; 1392 if ((tp->tte_data & TD_REF) != 0) 1393 vm_page_aflag_set(m, PGA_REFERENCED); 1394 if ((tp->tte_data & TD_W) != 0) 1395 vm_page_dirty(m); 1396 tp->tte_data &= ~TD_V; 1397 tlb_page_demap(pm, va); 1398 TAILQ_REMOVE(&m->md.tte_list, tp, tte_link); 1399 pm->pm_stats.resident_count--; 1400 pmap_cache_remove(m, va); 1401 TTE_ZERO(tp); 1402 PMAP_UNLOCK(pm); 1403 } 1404 vm_page_aflag_clear(m, PGA_WRITEABLE); 1405 rw_wunlock(&tte_list_global_lock); 1406} 1407 1408static int 1409pmap_protect_tte(struct pmap *pm, struct pmap *pm2, struct tte *tp, 1410 vm_offset_t va) 1411{ 1412 u_long data; 1413 vm_page_t m; 1414 1415 PMAP_LOCK_ASSERT(pm, MA_OWNED); 1416 data = atomic_clear_long(&tp->tte_data, TD_SW | TD_W); 1417 if ((data & (TD_PV | TD_W)) == (TD_PV | TD_W)) { 1418 m = PHYS_TO_VM_PAGE(TD_PA(data)); 1419 vm_page_dirty(m); 1420 } 1421 return (1); 1422} 1423 1424/* 1425 * Set the physical protection on the specified range of this map as requested. 1426 */ 1427void 1428pmap_protect(pmap_t pm, vm_offset_t sva, vm_offset_t eva, vm_prot_t prot) 1429{ 1430 vm_offset_t va; 1431 struct tte *tp; 1432 1433 CTR4(KTR_PMAP, "pmap_protect: ctx=%#lx sva=%#lx eva=%#lx prot=%#lx", 1434 pm->pm_context[curcpu], sva, eva, prot); 1435 1436 if ((prot & VM_PROT_READ) == VM_PROT_NONE) { 1437 pmap_remove(pm, sva, eva); 1438 return; 1439 } 1440 1441 if (prot & VM_PROT_WRITE) 1442 return; 1443 1444 PMAP_LOCK(pm); 1445 if (eva - sva > PMAP_TSB_THRESH) { 1446 tsb_foreach(pm, NULL, sva, eva, pmap_protect_tte); 1447 tlb_context_demap(pm); 1448 } else { 1449 for (va = sva; va < eva; va += PAGE_SIZE) 1450 if ((tp = tsb_tte_lookup(pm, va)) != NULL) 1451 pmap_protect_tte(pm, NULL, tp, va); 1452 tlb_range_demap(pm, sva, eva - 1); 1453 } 1454 PMAP_UNLOCK(pm); 1455} 1456 1457/* 1458 * Map the given physical page at the specified virtual address in the 1459 * target pmap with the protection requested. If specified the page 1460 * will be wired down. 1461 */ 1462int 1463pmap_enter(pmap_t pm, vm_offset_t va, vm_page_t m, vm_prot_t prot, 1464 u_int flags, int8_t psind) 1465{ 1466 int rv; 1467 1468 rw_wlock(&tte_list_global_lock); 1469 PMAP_LOCK(pm); 1470 rv = pmap_enter_locked(pm, va, m, prot, flags, psind); 1471 rw_wunlock(&tte_list_global_lock); 1472 PMAP_UNLOCK(pm); 1473 return (rv); 1474} 1475 1476/* 1477 * Map the given physical page at the specified virtual address in the 1478 * target pmap with the protection requested. If specified the page 1479 * will be wired down. 1480 * 1481 * The page queues and pmap must be locked. 1482 */ 1483static int 1484pmap_enter_locked(pmap_t pm, vm_offset_t va, vm_page_t m, vm_prot_t prot, 1485 u_int flags, int8_t psind __unused) 1486{ 1487 struct tte *tp; 1488 vm_paddr_t pa; 1489 vm_page_t real; 1490 u_long data; 1491 boolean_t wired; 1492 1493 rw_assert(&tte_list_global_lock, RA_WLOCKED); 1494 PMAP_LOCK_ASSERT(pm, MA_OWNED); 1495 if ((m->oflags & VPO_UNMANAGED) == 0 && !vm_page_xbusied(m)) 1496 VM_OBJECT_ASSERT_LOCKED(m->object); 1497 PMAP_STATS_INC(pmap_nenter); 1498 pa = VM_PAGE_TO_PHYS(m); 1499 wired = (flags & PMAP_ENTER_WIRED) != 0; 1500 1501 /* 1502 * If this is a fake page from the device_pager, but it covers actual 1503 * physical memory, convert to the real backing page. 1504 */ 1505 if ((m->flags & PG_FICTITIOUS) != 0) { 1506 real = vm_phys_paddr_to_vm_page(pa); 1507 if (real != NULL) 1508 m = real; 1509 } 1510 1511 CTR6(KTR_PMAP, 1512 "pmap_enter_locked: ctx=%p m=%p va=%#lx pa=%#lx prot=%#x wired=%d", 1513 pm->pm_context[curcpu], m, va, pa, prot, wired); 1514 1515 /* 1516 * If there is an existing mapping, and the physical address has not 1517 * changed, must be protection or wiring change. 1518 */ 1519 if ((tp = tsb_tte_lookup(pm, va)) != NULL && TTE_GET_PA(tp) == pa) { 1520 CTR0(KTR_PMAP, "pmap_enter_locked: update"); 1521 PMAP_STATS_INC(pmap_nenter_update); 1522 1523 /* 1524 * Wiring change, just update stats. 1525 */ 1526 if (wired) { 1527 if ((tp->tte_data & TD_WIRED) == 0) { 1528 tp->tte_data |= TD_WIRED; 1529 pm->pm_stats.wired_count++; 1530 } 1531 } else { 1532 if ((tp->tte_data & TD_WIRED) != 0) { 1533 tp->tte_data &= ~TD_WIRED; 1534 pm->pm_stats.wired_count--; 1535 } 1536 } 1537 1538 /* 1539 * Save the old bits and clear the ones we're interested in. 1540 */ 1541 data = tp->tte_data; 1542 tp->tte_data &= ~(TD_EXEC | TD_SW | TD_W); 1543 1544 /* 1545 * If we're turning off write permissions, sense modify status. 1546 */ 1547 if ((prot & VM_PROT_WRITE) != 0) { 1548 tp->tte_data |= TD_SW; 1549 if (wired) 1550 tp->tte_data |= TD_W; 1551 if ((m->oflags & VPO_UNMANAGED) == 0) 1552 vm_page_aflag_set(m, PGA_WRITEABLE); 1553 } else if ((data & TD_W) != 0) 1554 vm_page_dirty(m); 1555 1556 /* 1557 * If we're turning on execute permissions, flush the icache. 1558 */ 1559 if ((prot & VM_PROT_EXECUTE) != 0) { 1560 if ((data & TD_EXEC) == 0) 1561 icache_page_inval(pa); 1562 tp->tte_data |= TD_EXEC; 1563 } 1564 1565 /* 1566 * Delete the old mapping. 1567 */ 1568 tlb_page_demap(pm, TTE_GET_VA(tp)); 1569 } else { 1570 /* 1571 * If there is an existing mapping, but its for a different 1572 * physical address, delete the old mapping. 1573 */ 1574 if (tp != NULL) { 1575 CTR0(KTR_PMAP, "pmap_enter_locked: replace"); 1576 PMAP_STATS_INC(pmap_nenter_replace); 1577 pmap_remove_tte(pm, NULL, tp, va); 1578 tlb_page_demap(pm, va); 1579 } else { 1580 CTR0(KTR_PMAP, "pmap_enter_locked: new"); 1581 PMAP_STATS_INC(pmap_nenter_new); 1582 } 1583 1584 /* 1585 * Now set up the data and install the new mapping. 1586 */ 1587 data = TD_V | TD_8K | TD_PA(pa); 1588 if (pm == kernel_pmap) 1589 data |= TD_P; 1590 if ((prot & VM_PROT_WRITE) != 0) { 1591 data |= TD_SW; 1592 if ((m->oflags & VPO_UNMANAGED) == 0) 1593 vm_page_aflag_set(m, PGA_WRITEABLE); 1594 } 1595 if (prot & VM_PROT_EXECUTE) { 1596 data |= TD_EXEC; 1597 icache_page_inval(pa); 1598 } 1599 1600 /* 1601 * If its wired update stats. We also don't need reference or 1602 * modify tracking for wired mappings, so set the bits now. 1603 */ 1604 if (wired) { 1605 pm->pm_stats.wired_count++; 1606 data |= TD_REF | TD_WIRED; 1607 if ((prot & VM_PROT_WRITE) != 0) 1608 data |= TD_W; 1609 } 1610 1611 tsb_tte_enter(pm, m, va, TS_8K, data); 1612 } 1613 1614 return (KERN_SUCCESS); 1615} 1616 1617/* 1618 * Maps a sequence of resident pages belonging to the same object. 1619 * The sequence begins with the given page m_start. This page is 1620 * mapped at the given virtual address start. Each subsequent page is 1621 * mapped at a virtual address that is offset from start by the same 1622 * amount as the page is offset from m_start within the object. The 1623 * last page in the sequence is the page with the largest offset from 1624 * m_start that can be mapped at a virtual address less than the given 1625 * virtual address end. Not every virtual page between start and end 1626 * is mapped; only those for which a resident page exists with the 1627 * corresponding offset from m_start are mapped. 1628 */ 1629void 1630pmap_enter_object(pmap_t pm, vm_offset_t start, vm_offset_t end, 1631 vm_page_t m_start, vm_prot_t prot) 1632{ 1633 vm_page_t m; 1634 vm_pindex_t diff, psize; 1635 1636 VM_OBJECT_ASSERT_LOCKED(m_start->object); 1637 1638 psize = atop(end - start); 1639 m = m_start; 1640 rw_wlock(&tte_list_global_lock); 1641 PMAP_LOCK(pm); 1642 while (m != NULL && (diff = m->pindex - m_start->pindex) < psize) { 1643 pmap_enter_locked(pm, start + ptoa(diff), m, prot & 1644 (VM_PROT_READ | VM_PROT_EXECUTE), 0, 0); 1645 m = TAILQ_NEXT(m, listq); 1646 } 1647 rw_wunlock(&tte_list_global_lock); 1648 PMAP_UNLOCK(pm); 1649} 1650 1651void 1652pmap_enter_quick(pmap_t pm, vm_offset_t va, vm_page_t m, vm_prot_t prot) 1653{ 1654 1655 rw_wlock(&tte_list_global_lock); 1656 PMAP_LOCK(pm); 1657 pmap_enter_locked(pm, va, m, prot & (VM_PROT_READ | VM_PROT_EXECUTE), 1658 0, 0); 1659 rw_wunlock(&tte_list_global_lock); 1660 PMAP_UNLOCK(pm); 1661} 1662 1663void 1664pmap_object_init_pt(pmap_t pm, vm_offset_t addr, vm_object_t object, 1665 vm_pindex_t pindex, vm_size_t size) 1666{ 1667 1668 VM_OBJECT_ASSERT_WLOCKED(object); 1669 KASSERT(object->type == OBJT_DEVICE || object->type == OBJT_SG, 1670 ("pmap_object_init_pt: non-device object")); 1671} 1672 1673/* 1674 * Change the wiring attribute for a map/virtual-address pair. 1675 * The mapping must already exist in the pmap. 1676 */ 1677void 1678pmap_change_wiring(pmap_t pm, vm_offset_t va, boolean_t wired) 1679{ 1680 struct tte *tp; 1681 u_long data; 1682 1683 PMAP_LOCK(pm); 1684 if ((tp = tsb_tte_lookup(pm, va)) != NULL) { 1685 if (wired) { 1686 data = atomic_set_long(&tp->tte_data, TD_WIRED); 1687 if ((data & TD_WIRED) == 0) 1688 pm->pm_stats.wired_count++; 1689 } else { 1690 data = atomic_clear_long(&tp->tte_data, TD_WIRED); 1691 if ((data & TD_WIRED) != 0) 1692 pm->pm_stats.wired_count--; 1693 } 1694 } 1695 PMAP_UNLOCK(pm); 1696} 1697 1698static int 1699pmap_copy_tte(pmap_t src_pmap, pmap_t dst_pmap, struct tte *tp, 1700 vm_offset_t va) 1701{ 1702 vm_page_t m; 1703 u_long data; 1704 1705 if ((tp->tte_data & TD_FAKE) != 0) 1706 return (1); 1707 if (tsb_tte_lookup(dst_pmap, va) == NULL) { 1708 data = tp->tte_data & 1709 ~(TD_PV | TD_REF | TD_SW | TD_CV | TD_W); 1710 m = PHYS_TO_VM_PAGE(TTE_GET_PA(tp)); 1711 tsb_tte_enter(dst_pmap, m, va, TS_8K, data); 1712 } 1713 return (1); 1714} 1715 1716void 1717pmap_copy(pmap_t dst_pmap, pmap_t src_pmap, vm_offset_t dst_addr, 1718 vm_size_t len, vm_offset_t src_addr) 1719{ 1720 struct tte *tp; 1721 vm_offset_t va; 1722 1723 if (dst_addr != src_addr) 1724 return; 1725 rw_wlock(&tte_list_global_lock); 1726 if (dst_pmap < src_pmap) { 1727 PMAP_LOCK(dst_pmap); 1728 PMAP_LOCK(src_pmap); 1729 } else { 1730 PMAP_LOCK(src_pmap); 1731 PMAP_LOCK(dst_pmap); 1732 } 1733 if (len > PMAP_TSB_THRESH) { 1734 tsb_foreach(src_pmap, dst_pmap, src_addr, src_addr + len, 1735 pmap_copy_tte); 1736 tlb_context_demap(dst_pmap); 1737 } else { 1738 for (va = src_addr; va < src_addr + len; va += PAGE_SIZE) 1739 if ((tp = tsb_tte_lookup(src_pmap, va)) != NULL) 1740 pmap_copy_tte(src_pmap, dst_pmap, tp, va); 1741 tlb_range_demap(dst_pmap, src_addr, src_addr + len - 1); 1742 } 1743 rw_wunlock(&tte_list_global_lock); 1744 PMAP_UNLOCK(src_pmap); 1745 PMAP_UNLOCK(dst_pmap); 1746} 1747 1748void 1749pmap_zero_page(vm_page_t m) 1750{ 1751 struct tte *tp; 1752 vm_offset_t va; 1753 vm_paddr_t pa; 1754 1755 KASSERT((m->flags & PG_FICTITIOUS) == 0, 1756 ("pmap_zero_page: fake page")); 1757 PMAP_STATS_INC(pmap_nzero_page); 1758 pa = VM_PAGE_TO_PHYS(m); 1759 if (dcache_color_ignore != 0 || m->md.color == DCACHE_COLOR(pa)) { 1760 PMAP_STATS_INC(pmap_nzero_page_c); 1761 va = TLB_PHYS_TO_DIRECT(pa); 1762 cpu_block_zero((void *)va, PAGE_SIZE); 1763 } else if (m->md.color == -1) { 1764 PMAP_STATS_INC(pmap_nzero_page_nc); 1765 aszero(ASI_PHYS_USE_EC, pa, PAGE_SIZE); 1766 } else { 1767 PMAP_STATS_INC(pmap_nzero_page_oc); 1768 PMAP_LOCK(kernel_pmap); 1769 va = pmap_temp_map_1 + (m->md.color * PAGE_SIZE); 1770 tp = tsb_kvtotte(va); 1771 tp->tte_data = TD_V | TD_8K | TD_PA(pa) | TD_CP | TD_CV | TD_W; 1772 tp->tte_vpn = TV_VPN(va, TS_8K); 1773 cpu_block_zero((void *)va, PAGE_SIZE); 1774 tlb_page_demap(kernel_pmap, va); 1775 PMAP_UNLOCK(kernel_pmap); 1776 } 1777} 1778 1779void 1780pmap_zero_page_area(vm_page_t m, int off, int size) 1781{ 1782 struct tte *tp; 1783 vm_offset_t va; 1784 vm_paddr_t pa; 1785 1786 KASSERT((m->flags & PG_FICTITIOUS) == 0, 1787 ("pmap_zero_page_area: fake page")); 1788 KASSERT(off + size <= PAGE_SIZE, ("pmap_zero_page_area: bad off/size")); 1789 PMAP_STATS_INC(pmap_nzero_page_area); 1790 pa = VM_PAGE_TO_PHYS(m); 1791 if (dcache_color_ignore != 0 || m->md.color == DCACHE_COLOR(pa)) { 1792 PMAP_STATS_INC(pmap_nzero_page_area_c); 1793 va = TLB_PHYS_TO_DIRECT(pa); 1794 bzero((void *)(va + off), size); 1795 } else if (m->md.color == -1) { 1796 PMAP_STATS_INC(pmap_nzero_page_area_nc); 1797 aszero(ASI_PHYS_USE_EC, pa + off, size); 1798 } else { 1799 PMAP_STATS_INC(pmap_nzero_page_area_oc); 1800 PMAP_LOCK(kernel_pmap); 1801 va = pmap_temp_map_1 + (m->md.color * PAGE_SIZE); 1802 tp = tsb_kvtotte(va); 1803 tp->tte_data = TD_V | TD_8K | TD_PA(pa) | TD_CP | TD_CV | TD_W; 1804 tp->tte_vpn = TV_VPN(va, TS_8K); 1805 bzero((void *)(va + off), size); 1806 tlb_page_demap(kernel_pmap, va); 1807 PMAP_UNLOCK(kernel_pmap); 1808 } 1809} 1810 1811void 1812pmap_zero_page_idle(vm_page_t m) 1813{ 1814 struct tte *tp; 1815 vm_offset_t va; 1816 vm_paddr_t pa; 1817 1818 KASSERT((m->flags & PG_FICTITIOUS) == 0, 1819 ("pmap_zero_page_idle: fake page")); 1820 PMAP_STATS_INC(pmap_nzero_page_idle); 1821 pa = VM_PAGE_TO_PHYS(m); 1822 if (dcache_color_ignore != 0 || m->md.color == DCACHE_COLOR(pa)) { 1823 PMAP_STATS_INC(pmap_nzero_page_idle_c); 1824 va = TLB_PHYS_TO_DIRECT(pa); 1825 cpu_block_zero((void *)va, PAGE_SIZE); 1826 } else if (m->md.color == -1) { 1827 PMAP_STATS_INC(pmap_nzero_page_idle_nc); 1828 aszero(ASI_PHYS_USE_EC, pa, PAGE_SIZE); 1829 } else { 1830 PMAP_STATS_INC(pmap_nzero_page_idle_oc); 1831 va = pmap_idle_map + (m->md.color * PAGE_SIZE); 1832 tp = tsb_kvtotte(va); 1833 tp->tte_data = TD_V | TD_8K | TD_PA(pa) | TD_CP | TD_CV | TD_W; 1834 tp->tte_vpn = TV_VPN(va, TS_8K); 1835 cpu_block_zero((void *)va, PAGE_SIZE); 1836 tlb_page_demap(kernel_pmap, va); 1837 } 1838} 1839 1840void 1841pmap_copy_page(vm_page_t msrc, vm_page_t mdst) 1842{ 1843 vm_offset_t vdst; 1844 vm_offset_t vsrc; 1845 vm_paddr_t pdst; 1846 vm_paddr_t psrc; 1847 struct tte *tp; 1848 1849 KASSERT((mdst->flags & PG_FICTITIOUS) == 0, 1850 ("pmap_copy_page: fake dst page")); 1851 KASSERT((msrc->flags & PG_FICTITIOUS) == 0, 1852 ("pmap_copy_page: fake src page")); 1853 PMAP_STATS_INC(pmap_ncopy_page); 1854 pdst = VM_PAGE_TO_PHYS(mdst); 1855 psrc = VM_PAGE_TO_PHYS(msrc); 1856 if (dcache_color_ignore != 0 || 1857 (msrc->md.color == DCACHE_COLOR(psrc) && 1858 mdst->md.color == DCACHE_COLOR(pdst))) { 1859 PMAP_STATS_INC(pmap_ncopy_page_c); 1860 vdst = TLB_PHYS_TO_DIRECT(pdst); 1861 vsrc = TLB_PHYS_TO_DIRECT(psrc); 1862 cpu_block_copy((void *)vsrc, (void *)vdst, PAGE_SIZE); 1863 } else if (msrc->md.color == -1 && mdst->md.color == -1) { 1864 PMAP_STATS_INC(pmap_ncopy_page_nc); 1865 ascopy(ASI_PHYS_USE_EC, psrc, pdst, PAGE_SIZE); 1866 } else if (msrc->md.color == -1) { 1867 if (mdst->md.color == DCACHE_COLOR(pdst)) { 1868 PMAP_STATS_INC(pmap_ncopy_page_dc); 1869 vdst = TLB_PHYS_TO_DIRECT(pdst); 1870 ascopyfrom(ASI_PHYS_USE_EC, psrc, (void *)vdst, 1871 PAGE_SIZE); 1872 } else { 1873 PMAP_STATS_INC(pmap_ncopy_page_doc); 1874 PMAP_LOCK(kernel_pmap); 1875 vdst = pmap_temp_map_1 + (mdst->md.color * PAGE_SIZE); 1876 tp = tsb_kvtotte(vdst); 1877 tp->tte_data = 1878 TD_V | TD_8K | TD_PA(pdst) | TD_CP | TD_CV | TD_W; 1879 tp->tte_vpn = TV_VPN(vdst, TS_8K); 1880 ascopyfrom(ASI_PHYS_USE_EC, psrc, (void *)vdst, 1881 PAGE_SIZE); 1882 tlb_page_demap(kernel_pmap, vdst); 1883 PMAP_UNLOCK(kernel_pmap); 1884 } 1885 } else if (mdst->md.color == -1) { 1886 if (msrc->md.color == DCACHE_COLOR(psrc)) { 1887 PMAP_STATS_INC(pmap_ncopy_page_sc); 1888 vsrc = TLB_PHYS_TO_DIRECT(psrc); 1889 ascopyto((void *)vsrc, ASI_PHYS_USE_EC, pdst, 1890 PAGE_SIZE); 1891 } else { 1892 PMAP_STATS_INC(pmap_ncopy_page_soc); 1893 PMAP_LOCK(kernel_pmap); 1894 vsrc = pmap_temp_map_1 + (msrc->md.color * PAGE_SIZE); 1895 tp = tsb_kvtotte(vsrc); 1896 tp->tte_data = 1897 TD_V | TD_8K | TD_PA(psrc) | TD_CP | TD_CV | TD_W; 1898 tp->tte_vpn = TV_VPN(vsrc, TS_8K); 1899 ascopyto((void *)vsrc, ASI_PHYS_USE_EC, pdst, 1900 PAGE_SIZE); 1901 tlb_page_demap(kernel_pmap, vsrc); 1902 PMAP_UNLOCK(kernel_pmap); 1903 } 1904 } else { 1905 PMAP_STATS_INC(pmap_ncopy_page_oc); 1906 PMAP_LOCK(kernel_pmap); 1907 vdst = pmap_temp_map_1 + (mdst->md.color * PAGE_SIZE); 1908 tp = tsb_kvtotte(vdst); 1909 tp->tte_data = 1910 TD_V | TD_8K | TD_PA(pdst) | TD_CP | TD_CV | TD_W; 1911 tp->tte_vpn = TV_VPN(vdst, TS_8K); 1912 vsrc = pmap_temp_map_2 + (msrc->md.color * PAGE_SIZE); 1913 tp = tsb_kvtotte(vsrc); 1914 tp->tte_data = 1915 TD_V | TD_8K | TD_PA(psrc) | TD_CP | TD_CV | TD_W; 1916 tp->tte_vpn = TV_VPN(vsrc, TS_8K); 1917 cpu_block_copy((void *)vsrc, (void *)vdst, PAGE_SIZE); 1918 tlb_page_demap(kernel_pmap, vdst); 1919 tlb_page_demap(kernel_pmap, vsrc); 1920 PMAP_UNLOCK(kernel_pmap); 1921 } 1922} 1923 1924int unmapped_buf_allowed; 1925 1926void 1927pmap_copy_pages(vm_page_t ma[], vm_offset_t a_offset, vm_page_t mb[], 1928 vm_offset_t b_offset, int xfersize) 1929{ 1930 1931 panic("pmap_copy_pages: not implemented"); 1932} 1933 1934/* 1935 * Returns true if the pmap's pv is one of the first 1936 * 16 pvs linked to from this page. This count may 1937 * be changed upwards or downwards in the future; it 1938 * is only necessary that true be returned for a small 1939 * subset of pmaps for proper page aging. 1940 */ 1941boolean_t 1942pmap_page_exists_quick(pmap_t pm, vm_page_t m) 1943{ 1944 struct tte *tp; 1945 int loops; 1946 boolean_t rv; 1947 1948 KASSERT((m->oflags & VPO_UNMANAGED) == 0, 1949 ("pmap_page_exists_quick: page %p is not managed", m)); 1950 loops = 0; 1951 rv = FALSE; 1952 rw_wlock(&tte_list_global_lock); 1953 TAILQ_FOREACH(tp, &m->md.tte_list, tte_link) { 1954 if ((tp->tte_data & TD_PV) == 0) 1955 continue; 1956 if (TTE_GET_PMAP(tp) == pm) { 1957 rv = TRUE; 1958 break; 1959 } 1960 if (++loops >= 16) 1961 break; 1962 } 1963 rw_wunlock(&tte_list_global_lock); 1964 return (rv); 1965} 1966 1967/* 1968 * Return the number of managed mappings to the given physical page 1969 * that are wired. 1970 */ 1971int 1972pmap_page_wired_mappings(vm_page_t m) 1973{ 1974 struct tte *tp; 1975 int count; 1976 1977 count = 0; 1978 if ((m->oflags & VPO_UNMANAGED) != 0) 1979 return (count); 1980 rw_wlock(&tte_list_global_lock); 1981 TAILQ_FOREACH(tp, &m->md.tte_list, tte_link) 1982 if ((tp->tte_data & (TD_PV | TD_WIRED)) == (TD_PV | TD_WIRED)) 1983 count++; 1984 rw_wunlock(&tte_list_global_lock); 1985 return (count); 1986} 1987 1988/* 1989 * Remove all pages from specified address space, this aids process exit 1990 * speeds. This is much faster than pmap_remove in the case of running down 1991 * an entire address space. Only works for the current pmap. 1992 */ 1993void 1994pmap_remove_pages(pmap_t pm) 1995{ 1996 1997} 1998 1999/* 2000 * Returns TRUE if the given page has a managed mapping. 2001 */ 2002boolean_t 2003pmap_page_is_mapped(vm_page_t m) 2004{ 2005 struct tte *tp; 2006 boolean_t rv; 2007 2008 rv = FALSE; 2009 if ((m->oflags & VPO_UNMANAGED) != 0) 2010 return (rv); 2011 rw_wlock(&tte_list_global_lock); 2012 TAILQ_FOREACH(tp, &m->md.tte_list, tte_link) 2013 if ((tp->tte_data & TD_PV) != 0) { 2014 rv = TRUE; 2015 break; 2016 } 2017 rw_wunlock(&tte_list_global_lock); 2018 return (rv); 2019} 2020 2021/* 2022 * Return a count of reference bits for a page, clearing those bits. 2023 * It is not necessary for every reference bit to be cleared, but it 2024 * is necessary that 0 only be returned when there are truly no 2025 * reference bits set. 2026 * 2027 * XXX: The exact number of bits to check and clear is a matter that 2028 * should be tested and standardized at some point in the future for 2029 * optimal aging of shared pages. 2030 */ 2031int 2032pmap_ts_referenced(vm_page_t m) 2033{ 2034 struct tte *tpf; 2035 struct tte *tpn; 2036 struct tte *tp; 2037 u_long data; 2038 int count; 2039 2040 KASSERT((m->oflags & VPO_UNMANAGED) == 0, 2041 ("pmap_ts_referenced: page %p is not managed", m)); 2042 count = 0; 2043 rw_wlock(&tte_list_global_lock); 2044 if ((tp = TAILQ_FIRST(&m->md.tte_list)) != NULL) { 2045 tpf = tp; 2046 do { 2047 tpn = TAILQ_NEXT(tp, tte_link); 2048 TAILQ_REMOVE(&m->md.tte_list, tp, tte_link); 2049 TAILQ_INSERT_TAIL(&m->md.tte_list, tp, tte_link); 2050 if ((tp->tte_data & TD_PV) == 0) 2051 continue; 2052 data = atomic_clear_long(&tp->tte_data, TD_REF); 2053 if ((data & TD_REF) != 0 && ++count > 4) 2054 break; 2055 } while ((tp = tpn) != NULL && tp != tpf); 2056 } 2057 rw_wunlock(&tte_list_global_lock); 2058 return (count); 2059} 2060 2061boolean_t 2062pmap_is_modified(vm_page_t m) 2063{ 2064 struct tte *tp; 2065 boolean_t rv; 2066 2067 KASSERT((m->oflags & VPO_UNMANAGED) == 0, 2068 ("pmap_is_modified: page %p is not managed", m)); 2069 rv = FALSE; 2070 2071 /* 2072 * If the page is not exclusive busied, then PGA_WRITEABLE cannot be 2073 * concurrently set while the object is locked. Thus, if PGA_WRITEABLE 2074 * is clear, no TTEs can have TD_W set. 2075 */ 2076 VM_OBJECT_ASSERT_WLOCKED(m->object); 2077 if (!vm_page_xbusied(m) && (m->aflags & PGA_WRITEABLE) == 0) 2078 return (rv); 2079 rw_wlock(&tte_list_global_lock); 2080 TAILQ_FOREACH(tp, &m->md.tte_list, tte_link) { 2081 if ((tp->tte_data & TD_PV) == 0) 2082 continue; 2083 if ((tp->tte_data & TD_W) != 0) { 2084 rv = TRUE; 2085 break; 2086 } 2087 } 2088 rw_wunlock(&tte_list_global_lock); 2089 return (rv); 2090} 2091 2092/* 2093 * pmap_is_prefaultable: 2094 * 2095 * Return whether or not the specified virtual address is elgible 2096 * for prefault. 2097 */ 2098boolean_t 2099pmap_is_prefaultable(pmap_t pmap, vm_offset_t addr) 2100{ 2101 boolean_t rv; 2102 2103 PMAP_LOCK(pmap); 2104 rv = tsb_tte_lookup(pmap, addr) == NULL; 2105 PMAP_UNLOCK(pmap); 2106 return (rv); 2107} 2108 2109/* 2110 * Return whether or not the specified physical page was referenced 2111 * in any physical maps. 2112 */ 2113boolean_t 2114pmap_is_referenced(vm_page_t m) 2115{ 2116 struct tte *tp; 2117 boolean_t rv; 2118 2119 KASSERT((m->oflags & VPO_UNMANAGED) == 0, 2120 ("pmap_is_referenced: page %p is not managed", m)); 2121 rv = FALSE; 2122 rw_wlock(&tte_list_global_lock); 2123 TAILQ_FOREACH(tp, &m->md.tte_list, tte_link) { 2124 if ((tp->tte_data & TD_PV) == 0) 2125 continue; 2126 if ((tp->tte_data & TD_REF) != 0) { 2127 rv = TRUE; 2128 break; 2129 } 2130 } 2131 rw_wunlock(&tte_list_global_lock); 2132 return (rv); 2133} 2134 2135/* 2136 * This function is advisory. 2137 */ 2138void 2139pmap_advise(pmap_t pmap, vm_offset_t sva, vm_offset_t eva, int advice) 2140{ 2141} 2142 2143void 2144pmap_clear_modify(vm_page_t m) 2145{ 2146 struct tte *tp; 2147 u_long data; 2148 2149 KASSERT((m->oflags & VPO_UNMANAGED) == 0, 2150 ("pmap_clear_modify: page %p is not managed", m)); 2151 VM_OBJECT_ASSERT_WLOCKED(m->object); 2152 KASSERT(!vm_page_xbusied(m), 2153 ("pmap_clear_modify: page %p is exclusive busied", m)); 2154 2155 /* 2156 * If the page is not PGA_WRITEABLE, then no TTEs can have TD_W set. 2157 * If the object containing the page is locked and the page is not 2158 * exclusive busied, then PGA_WRITEABLE cannot be concurrently set. 2159 */ 2160 if ((m->aflags & PGA_WRITEABLE) == 0) 2161 return; 2162 rw_wlock(&tte_list_global_lock); 2163 TAILQ_FOREACH(tp, &m->md.tte_list, tte_link) { 2164 if ((tp->tte_data & TD_PV) == 0) 2165 continue; 2166 data = atomic_clear_long(&tp->tte_data, TD_W); 2167 if ((data & TD_W) != 0) 2168 tlb_page_demap(TTE_GET_PMAP(tp), TTE_GET_VA(tp)); 2169 } 2170 rw_wunlock(&tte_list_global_lock); 2171} 2172 2173void 2174pmap_remove_write(vm_page_t m) 2175{ 2176 struct tte *tp; 2177 u_long data; 2178 2179 KASSERT((m->oflags & VPO_UNMANAGED) == 0, 2180 ("pmap_remove_write: page %p is not managed", m)); 2181 2182 /* 2183 * If the page is not exclusive busied, then PGA_WRITEABLE cannot be 2184 * set by another thread while the object is locked. Thus, 2185 * if PGA_WRITEABLE is clear, no page table entries need updating. 2186 */ 2187 VM_OBJECT_ASSERT_WLOCKED(m->object); 2188 if (!vm_page_xbusied(m) && (m->aflags & PGA_WRITEABLE) == 0) 2189 return; 2190 rw_wlock(&tte_list_global_lock); 2191 TAILQ_FOREACH(tp, &m->md.tte_list, tte_link) { 2192 if ((tp->tte_data & TD_PV) == 0) 2193 continue; 2194 data = atomic_clear_long(&tp->tte_data, TD_SW | TD_W); 2195 if ((data & TD_W) != 0) { 2196 vm_page_dirty(m); 2197 tlb_page_demap(TTE_GET_PMAP(tp), TTE_GET_VA(tp)); 2198 } 2199 } 2200 vm_page_aflag_clear(m, PGA_WRITEABLE); 2201 rw_wunlock(&tte_list_global_lock); 2202} 2203 2204int 2205pmap_mincore(pmap_t pm, vm_offset_t addr, vm_paddr_t *locked_pa) 2206{ 2207 2208 /* TODO; */ 2209 return (0); 2210} 2211 2212/* 2213 * Activate a user pmap. The pmap must be activated before its address space 2214 * can be accessed in any way. 2215 */ 2216void 2217pmap_activate(struct thread *td) 2218{ 2219 struct vmspace *vm; 2220 struct pmap *pm; 2221 int context; 2222 2223 critical_enter(); 2224 vm = td->td_proc->p_vmspace; 2225 pm = vmspace_pmap(vm); 2226 2227 context = PCPU_GET(tlb_ctx); 2228 if (context == PCPU_GET(tlb_ctx_max)) { 2229 tlb_flush_user(); 2230 context = PCPU_GET(tlb_ctx_min); 2231 } 2232 PCPU_SET(tlb_ctx, context + 1); 2233 2234 pm->pm_context[curcpu] = context; 2235#ifdef SMP 2236 CPU_SET_ATOMIC(PCPU_GET(cpuid), &pm->pm_active); 2237 atomic_store_acq_ptr((uintptr_t *)PCPU_PTR(pmap), (uintptr_t)pm); 2238#else 2239 CPU_SET(PCPU_GET(cpuid), &pm->pm_active); 2240 PCPU_SET(pmap, pm); 2241#endif 2242 2243 stxa(AA_DMMU_TSB, ASI_DMMU, pm->pm_tsb); 2244 stxa(AA_IMMU_TSB, ASI_IMMU, pm->pm_tsb); 2245 stxa(AA_DMMU_PCXR, ASI_DMMU, (ldxa(AA_DMMU_PCXR, ASI_DMMU) & 2246 TLB_CXR_PGSZ_MASK) | context); 2247 flush(KERNBASE); 2248 critical_exit(); 2249} 2250 2251void 2252pmap_sync_icache(pmap_t pm, vm_offset_t va, vm_size_t sz) 2253{ 2254 2255} 2256 2257/* 2258 * Increase the starting virtual address of the given mapping if a 2259 * different alignment might result in more superpage mappings. 2260 */ 2261void 2262pmap_align_superpage(vm_object_t object, vm_ooffset_t offset, 2263 vm_offset_t *addr, vm_size_t size) 2264{ 2265 2266} 2267