1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (C) 2007-2009 Semihalf, Rafal Jaworowski <raj@semihalf.com> 5 * Copyright (C) 2006 Semihalf, Marian Balakowicz <m8@semihalf.com> 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN 20 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED 22 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 23 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 24 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 25 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 26 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * Some hw specific parts of this pmap were derived or influenced 29 * by NetBSD's ibm4xx pmap module. More generic code is shared with 30 * a few other pmap modules from the FreeBSD tree. 31 */ 32 33 /* 34 * VM layout notes: 35 * 36 * Kernel and user threads run within one common virtual address space 37 * defined by AS=0. 38 * 39 * 32-bit pmap: 40 * Virtual address space layout: 41 * ----------------------------- 42 * 0x0000_0000 - 0x7fff_ffff : user process 43 * 0x8000_0000 - 0xbfff_ffff : pmap_mapdev()-ed area (PCI/PCIE etc.) 44 * 0xc000_0000 - 0xc0ff_ffff : kernel reserved 45 * 0xc000_0000 - data_end : kernel code+data, env, metadata etc. 46 * 0xc100_0000 - 0xffff_ffff : KVA 47 * 0xc100_0000 - 0xc100_3fff : reserved for page zero/copy 48 * 0xc100_4000 - 0xc200_3fff : reserved for ptbl bufs 49 * 0xc200_4000 - 0xc200_8fff : guard page + kstack0 50 * 0xc200_9000 - 0xfeef_ffff : actual free KVA space 51 * 52 * 64-bit pmap: 53 * Virtual address space layout: 54 * ----------------------------- 55 * 0x0000_0000_0000_0000 - 0xbfff_ffff_ffff_ffff : user process 56 * 0x0000_0000_0000_0000 - 0x8fff_ffff_ffff_ffff : text, data, heap, maps, libraries 57 * 0x9000_0000_0000_0000 - 0xafff_ffff_ffff_ffff : mmio region 58 * 0xb000_0000_0000_0000 - 0xbfff_ffff_ffff_ffff : stack 59 * 0xc000_0000_0000_0000 - 0xcfff_ffff_ffff_ffff : kernel reserved 60 * 0xc000_0000_0000_0000 - endkernel-1 : kernel code & data 61 * endkernel - msgbufp-1 : flat device tree 62 * msgbufp - kernel_pdir-1 : message buffer 63 * kernel_pdir - kernel_pp2d-1 : kernel page directory 64 * kernel_pp2d - . : kernel pointers to page directory 65 * pmap_zero_copy_min - crashdumpmap-1 : reserved for page zero/copy 66 * crashdumpmap - ptbl_buf_pool_vabase-1 : reserved for ptbl bufs 67 * ptbl_buf_pool_vabase - virtual_avail-1 : user page directories and page tables 68 * virtual_avail - 0xcfff_ffff_ffff_ffff : actual free KVA space 69 * 0xd000_0000_0000_0000 - 0xdfff_ffff_ffff_ffff : coprocessor region 70 * 0xe000_0000_0000_0000 - 0xefff_ffff_ffff_ffff : mmio region 71 * 0xf000_0000_0000_0000 - 0xffff_ffff_ffff_ffff : direct map 72 * 0xf000_0000_0000_0000 - +Maxmem : physmem map 73 * - 0xffff_ffff_ffff_ffff : device direct map 74 */ 75 76 #include <sys/cdefs.h> 77 __FBSDID("$FreeBSD$"); 78 79 #include "opt_ddb.h" 80 #include "opt_kstack_pages.h" 81 82 #include <sys/param.h> 83 #include <sys/conf.h> 84 #include <sys/malloc.h> 85 #include <sys/ktr.h> 86 #include <sys/proc.h> 87 #include <sys/user.h> 88 #include <sys/queue.h> 89 #include <sys/systm.h> 90 #include <sys/kernel.h> 91 #include <sys/kerneldump.h> 92 #include <sys/linker.h> 93 #include <sys/msgbuf.h> 94 #include <sys/lock.h> 95 #include <sys/mutex.h> 96 #include <sys/rwlock.h> 97 #include <sys/sched.h> 98 #include <sys/smp.h> 99 #include <sys/vmmeter.h> 100 101 #include <vm/vm.h> 102 #include <vm/vm_page.h> 103 #include <vm/vm_kern.h> 104 #include <vm/vm_pageout.h> 105 #include <vm/vm_extern.h> 106 #include <vm/vm_object.h> 107 #include <vm/vm_param.h> 108 #include <vm/vm_map.h> 109 #include <vm/vm_pager.h> 110 #include <vm/vm_phys.h> 111 #include <vm/vm_pagequeue.h> 112 #include <vm/uma.h> 113 114 #include <machine/_inttypes.h> 115 #include <machine/cpu.h> 116 #include <machine/pcb.h> 117 #include <machine/platform.h> 118 119 #include <machine/tlb.h> 120 #include <machine/spr.h> 121 #include <machine/md_var.h> 122 #include <machine/mmuvar.h> 123 #include <machine/pmap.h> 124 #include <machine/pte.h> 125 126 #include <ddb/ddb.h> 127 128 #include "mmu_if.h" 129 130 #define SPARSE_MAPDEV 131 #ifdef DEBUG 132 #define debugf(fmt, args...) printf(fmt, ##args) 133 #else 134 #define debugf(fmt, args...) 135 #endif 136 137 #ifdef __powerpc64__ 138 #define PRI0ptrX "016lx" 139 #else 140 #define PRI0ptrX "08x" 141 #endif 142 143 #define TODO panic("%s: not implemented", __func__); 144 145 extern unsigned char _etext[]; 146 extern unsigned char _end[]; 147 148 extern uint32_t *bootinfo; 149 150 vm_paddr_t kernload; 151 vm_offset_t kernstart; 152 vm_size_t kernsize; 153 154 /* Message buffer and tables. */ 155 static vm_offset_t data_start; 156 static vm_size_t data_end; 157 158 /* Phys/avail memory regions. */ 159 static struct mem_region *availmem_regions; 160 static int availmem_regions_sz; 161 static struct mem_region *physmem_regions; 162 static int physmem_regions_sz; 163 164 #ifndef __powerpc64__ 165 /* Reserved KVA space and mutex for mmu_booke_zero_page. */ 166 static vm_offset_t zero_page_va; 167 static struct mtx zero_page_mutex; 168 169 /* Reserved KVA space and mutex for mmu_booke_copy_page. */ 170 static vm_offset_t copy_page_src_va; 171 static vm_offset_t copy_page_dst_va; 172 static struct mtx copy_page_mutex; 173 #endif 174 175 static struct mtx tlbivax_mutex; 176 177 /**************************************************************************/ 178 /* PMAP */ 179 /**************************************************************************/ 180 181 static int mmu_booke_enter_locked(mmu_t, pmap_t, vm_offset_t, vm_page_t, 182 vm_prot_t, u_int flags, int8_t psind); 183 184 unsigned int kptbl_min; /* Index of the first kernel ptbl. */ 185 unsigned int kernel_ptbls; /* Number of KVA ptbls. */ 186 #ifdef __powerpc64__ 187 unsigned int kernel_pdirs; 188 #endif 189 static uma_zone_t ptbl_root_zone; 190 191 /* 192 * If user pmap is processed with mmu_booke_remove and the resident count 193 * drops to 0, there are no more pages to remove, so we need not continue. 194 */ 195 #define PMAP_REMOVE_DONE(pmap) \ 196 ((pmap) != kernel_pmap && (pmap)->pm_stats.resident_count == 0) 197 198 #if defined(COMPAT_FREEBSD32) || !defined(__powerpc64__) 199 extern int elf32_nxstack; 200 #endif 201 202 /**************************************************************************/ 203 /* TLB and TID handling */ 204 /**************************************************************************/ 205 206 /* Translation ID busy table */ 207 static volatile pmap_t tidbusy[MAXCPU][TID_MAX + 1]; 208 209 /* 210 * TLB0 capabilities (entry, way numbers etc.). These can vary between e500 211 * core revisions and should be read from h/w registers during early config. 212 */ 213 uint32_t tlb0_entries; 214 uint32_t tlb0_ways; 215 uint32_t tlb0_entries_per_way; 216 uint32_t tlb1_entries; 217 218 #define TLB0_ENTRIES (tlb0_entries) 219 #define TLB0_WAYS (tlb0_ways) 220 #define TLB0_ENTRIES_PER_WAY (tlb0_entries_per_way) 221 222 #define TLB1_ENTRIES (tlb1_entries) 223 224 static vm_offset_t tlb1_map_base = (vm_offset_t)VM_MAXUSER_ADDRESS + PAGE_SIZE; 225 226 static tlbtid_t tid_alloc(struct pmap *); 227 static void tid_flush(tlbtid_t tid); 228 229 #ifdef DDB 230 #ifdef __powerpc64__ 231 static void tlb_print_entry(int, uint32_t, uint64_t, uint32_t, uint32_t); 232 #else 233 static void tlb_print_entry(int, uint32_t, uint32_t, uint32_t, uint32_t); 234 #endif 235 #endif 236 237 static void tlb1_read_entry(tlb_entry_t *, unsigned int); 238 static void tlb1_write_entry(tlb_entry_t *, unsigned int); 239 static int tlb1_iomapped(int, vm_paddr_t, vm_size_t, vm_offset_t *); 240 static vm_size_t tlb1_mapin_region(vm_offset_t, vm_paddr_t, vm_size_t); 241 242 static vm_size_t tsize2size(unsigned int); 243 static unsigned int size2tsize(vm_size_t); 244 static unsigned int ilog2(unsigned long); 245 246 static void set_mas4_defaults(void); 247 248 static inline void tlb0_flush_entry(vm_offset_t); 249 static inline unsigned int tlb0_tableidx(vm_offset_t, unsigned int); 250 251 /**************************************************************************/ 252 /* Page table management */ 253 /**************************************************************************/ 254 255 static struct rwlock_padalign pvh_global_lock; 256 257 /* Data for the pv entry allocation mechanism */ 258 static uma_zone_t pvzone; 259 static int pv_entry_count = 0, pv_entry_max = 0, pv_entry_high_water = 0; 260 261 #define PV_ENTRY_ZONE_MIN 2048 /* min pv entries in uma zone */ 262 263 #ifndef PMAP_SHPGPERPROC 264 #define PMAP_SHPGPERPROC 200 265 #endif 266 267 #ifdef __powerpc64__ 268 #define PMAP_ROOT_SIZE (sizeof(pte_t***) * PP2D_NENTRIES) 269 static pte_t *ptbl_alloc(mmu_t, pmap_t, pte_t **, 270 unsigned int, boolean_t); 271 static void ptbl_free(mmu_t, pmap_t, pte_t **, unsigned int, vm_page_t); 272 static void ptbl_hold(mmu_t, pmap_t, pte_t **, unsigned int); 273 static int ptbl_unhold(mmu_t, pmap_t, vm_offset_t); 274 #else 275 #define PMAP_ROOT_SIZE (sizeof(pte_t**) * PDIR_NENTRIES) 276 static void ptbl_init(void); 277 static struct ptbl_buf *ptbl_buf_alloc(void); 278 static void ptbl_buf_free(struct ptbl_buf *); 279 static void ptbl_free_pmap_ptbl(pmap_t, pte_t *); 280 281 static pte_t *ptbl_alloc(mmu_t, pmap_t, unsigned int, boolean_t); 282 static void ptbl_free(mmu_t, pmap_t, unsigned int); 283 static void ptbl_hold(mmu_t, pmap_t, unsigned int); 284 static int ptbl_unhold(mmu_t, pmap_t, unsigned int); 285 #endif 286 287 static vm_paddr_t pte_vatopa(mmu_t, pmap_t, vm_offset_t); 288 static int pte_enter(mmu_t, pmap_t, vm_page_t, vm_offset_t, uint32_t, boolean_t); 289 static int pte_remove(mmu_t, pmap_t, vm_offset_t, uint8_t); 290 static pte_t *pte_find(mmu_t, pmap_t, vm_offset_t); 291 static void kernel_pte_alloc(vm_offset_t, vm_offset_t, vm_offset_t); 292 293 static pv_entry_t pv_alloc(void); 294 static void pv_free(pv_entry_t); 295 static void pv_insert(pmap_t, vm_offset_t, vm_page_t); 296 static void pv_remove(pmap_t, vm_offset_t, vm_page_t); 297 298 static void booke_pmap_init_qpages(void); 299 300 struct ptbl_buf { 301 TAILQ_ENTRY(ptbl_buf) link; /* list link */ 302 vm_offset_t kva; /* va of mapping */ 303 }; 304 305 #ifndef __powerpc64__ 306 /* Number of kva ptbl buffers, each covering one ptbl (PTBL_PAGES). */ 307 #define PTBL_BUFS (128 * 16) 308 309 /* ptbl free list and a lock used for access synchronization. */ 310 static TAILQ_HEAD(, ptbl_buf) ptbl_buf_freelist; 311 static struct mtx ptbl_buf_freelist_lock; 312 313 /* Base address of kva space allocated fot ptbl bufs. */ 314 static vm_offset_t ptbl_buf_pool_vabase; 315 316 /* Pointer to ptbl_buf structures. */ 317 static struct ptbl_buf *ptbl_bufs; 318 #endif 319 320 #ifdef SMP 321 extern tlb_entry_t __boot_tlb1[]; 322 void pmap_bootstrap_ap(volatile uint32_t *); 323 #endif 324 325 /* 326 * Kernel MMU interface 327 */ 328 static void mmu_booke_clear_modify(mmu_t, vm_page_t); 329 static void mmu_booke_copy(mmu_t, pmap_t, pmap_t, vm_offset_t, 330 vm_size_t, vm_offset_t); 331 static void mmu_booke_copy_page(mmu_t, vm_page_t, vm_page_t); 332 static void mmu_booke_copy_pages(mmu_t, vm_page_t *, 333 vm_offset_t, vm_page_t *, vm_offset_t, int); 334 static int mmu_booke_enter(mmu_t, pmap_t, vm_offset_t, vm_page_t, 335 vm_prot_t, u_int flags, int8_t psind); 336 static void mmu_booke_enter_object(mmu_t, pmap_t, vm_offset_t, vm_offset_t, 337 vm_page_t, vm_prot_t); 338 static void mmu_booke_enter_quick(mmu_t, pmap_t, vm_offset_t, vm_page_t, 339 vm_prot_t); 340 static vm_paddr_t mmu_booke_extract(mmu_t, pmap_t, vm_offset_t); 341 static vm_page_t mmu_booke_extract_and_hold(mmu_t, pmap_t, vm_offset_t, 342 vm_prot_t); 343 static void mmu_booke_init(mmu_t); 344 static boolean_t mmu_booke_is_modified(mmu_t, vm_page_t); 345 static boolean_t mmu_booke_is_prefaultable(mmu_t, pmap_t, vm_offset_t); 346 static boolean_t mmu_booke_is_referenced(mmu_t, vm_page_t); 347 static int mmu_booke_ts_referenced(mmu_t, vm_page_t); 348 static vm_offset_t mmu_booke_map(mmu_t, vm_offset_t *, vm_paddr_t, vm_paddr_t, 349 int); 350 static int mmu_booke_mincore(mmu_t, pmap_t, vm_offset_t, 351 vm_paddr_t *); 352 static void mmu_booke_object_init_pt(mmu_t, pmap_t, vm_offset_t, 353 vm_object_t, vm_pindex_t, vm_size_t); 354 static boolean_t mmu_booke_page_exists_quick(mmu_t, pmap_t, vm_page_t); 355 static void mmu_booke_page_init(mmu_t, vm_page_t); 356 static int mmu_booke_page_wired_mappings(mmu_t, vm_page_t); 357 static void mmu_booke_pinit(mmu_t, pmap_t); 358 static void mmu_booke_pinit0(mmu_t, pmap_t); 359 static void mmu_booke_protect(mmu_t, pmap_t, vm_offset_t, vm_offset_t, 360 vm_prot_t); 361 static void mmu_booke_qenter(mmu_t, vm_offset_t, vm_page_t *, int); 362 static void mmu_booke_qremove(mmu_t, vm_offset_t, int); 363 static void mmu_booke_release(mmu_t, pmap_t); 364 static void mmu_booke_remove(mmu_t, pmap_t, vm_offset_t, vm_offset_t); 365 static void mmu_booke_remove_all(mmu_t, vm_page_t); 366 static void mmu_booke_remove_write(mmu_t, vm_page_t); 367 static void mmu_booke_unwire(mmu_t, pmap_t, vm_offset_t, vm_offset_t); 368 static void mmu_booke_zero_page(mmu_t, vm_page_t); 369 static void mmu_booke_zero_page_area(mmu_t, vm_page_t, int, int); 370 static void mmu_booke_activate(mmu_t, struct thread *); 371 static void mmu_booke_deactivate(mmu_t, struct thread *); 372 static void mmu_booke_bootstrap(mmu_t, vm_offset_t, vm_offset_t); 373 static void *mmu_booke_mapdev(mmu_t, vm_paddr_t, vm_size_t); 374 static void *mmu_booke_mapdev_attr(mmu_t, vm_paddr_t, vm_size_t, vm_memattr_t); 375 static void mmu_booke_unmapdev(mmu_t, vm_offset_t, vm_size_t); 376 static vm_paddr_t mmu_booke_kextract(mmu_t, vm_offset_t); 377 static void mmu_booke_kenter(mmu_t, vm_offset_t, vm_paddr_t); 378 static void mmu_booke_kenter_attr(mmu_t, vm_offset_t, vm_paddr_t, vm_memattr_t); 379 static void mmu_booke_kremove(mmu_t, vm_offset_t); 380 static boolean_t mmu_booke_dev_direct_mapped(mmu_t, vm_paddr_t, vm_size_t); 381 static void mmu_booke_sync_icache(mmu_t, pmap_t, vm_offset_t, 382 vm_size_t); 383 static void mmu_booke_dumpsys_map(mmu_t, vm_paddr_t pa, size_t, 384 void **); 385 static void mmu_booke_dumpsys_unmap(mmu_t, vm_paddr_t pa, size_t, 386 void *); 387 static void mmu_booke_scan_init(mmu_t); 388 static vm_offset_t mmu_booke_quick_enter_page(mmu_t mmu, vm_page_t m); 389 static void mmu_booke_quick_remove_page(mmu_t mmu, vm_offset_t addr); 390 static int mmu_booke_change_attr(mmu_t mmu, vm_offset_t addr, 391 vm_size_t sz, vm_memattr_t mode); 392 static int mmu_booke_map_user_ptr(mmu_t mmu, pmap_t pm, 393 volatile const void *uaddr, void **kaddr, size_t ulen, size_t *klen); 394 static int mmu_booke_decode_kernel_ptr(mmu_t mmu, vm_offset_t addr, 395 int *is_user, vm_offset_t *decoded_addr); 396 397 398 static mmu_method_t mmu_booke_methods[] = { 399 /* pmap dispatcher interface */ 400 MMUMETHOD(mmu_clear_modify, mmu_booke_clear_modify), 401 MMUMETHOD(mmu_copy, mmu_booke_copy), 402 MMUMETHOD(mmu_copy_page, mmu_booke_copy_page), 403 MMUMETHOD(mmu_copy_pages, mmu_booke_copy_pages), 404 MMUMETHOD(mmu_enter, mmu_booke_enter), 405 MMUMETHOD(mmu_enter_object, mmu_booke_enter_object), 406 MMUMETHOD(mmu_enter_quick, mmu_booke_enter_quick), 407 MMUMETHOD(mmu_extract, mmu_booke_extract), 408 MMUMETHOD(mmu_extract_and_hold, mmu_booke_extract_and_hold), 409 MMUMETHOD(mmu_init, mmu_booke_init), 410 MMUMETHOD(mmu_is_modified, mmu_booke_is_modified), 411 MMUMETHOD(mmu_is_prefaultable, mmu_booke_is_prefaultable), 412 MMUMETHOD(mmu_is_referenced, mmu_booke_is_referenced), 413 MMUMETHOD(mmu_ts_referenced, mmu_booke_ts_referenced), 414 MMUMETHOD(mmu_map, mmu_booke_map), 415 MMUMETHOD(mmu_mincore, mmu_booke_mincore), 416 MMUMETHOD(mmu_object_init_pt, mmu_booke_object_init_pt), 417 MMUMETHOD(mmu_page_exists_quick,mmu_booke_page_exists_quick), 418 MMUMETHOD(mmu_page_init, mmu_booke_page_init), 419 MMUMETHOD(mmu_page_wired_mappings, mmu_booke_page_wired_mappings), 420 MMUMETHOD(mmu_pinit, mmu_booke_pinit), 421 MMUMETHOD(mmu_pinit0, mmu_booke_pinit0), 422 MMUMETHOD(mmu_protect, mmu_booke_protect), 423 MMUMETHOD(mmu_qenter, mmu_booke_qenter), 424 MMUMETHOD(mmu_qremove, mmu_booke_qremove), 425 MMUMETHOD(mmu_release, mmu_booke_release), 426 MMUMETHOD(mmu_remove, mmu_booke_remove), 427 MMUMETHOD(mmu_remove_all, mmu_booke_remove_all), 428 MMUMETHOD(mmu_remove_write, mmu_booke_remove_write), 429 MMUMETHOD(mmu_sync_icache, mmu_booke_sync_icache), 430 MMUMETHOD(mmu_unwire, mmu_booke_unwire), 431 MMUMETHOD(mmu_zero_page, mmu_booke_zero_page), 432 MMUMETHOD(mmu_zero_page_area, mmu_booke_zero_page_area), 433 MMUMETHOD(mmu_activate, mmu_booke_activate), 434 MMUMETHOD(mmu_deactivate, mmu_booke_deactivate), 435 MMUMETHOD(mmu_quick_enter_page, mmu_booke_quick_enter_page), 436 MMUMETHOD(mmu_quick_remove_page, mmu_booke_quick_remove_page), 437 438 /* Internal interfaces */ 439 MMUMETHOD(mmu_bootstrap, mmu_booke_bootstrap), 440 MMUMETHOD(mmu_dev_direct_mapped,mmu_booke_dev_direct_mapped), 441 MMUMETHOD(mmu_mapdev, mmu_booke_mapdev), 442 MMUMETHOD(mmu_mapdev_attr, mmu_booke_mapdev_attr), 443 MMUMETHOD(mmu_kenter, mmu_booke_kenter), 444 MMUMETHOD(mmu_kenter_attr, mmu_booke_kenter_attr), 445 MMUMETHOD(mmu_kextract, mmu_booke_kextract), 446 MMUMETHOD(mmu_kremove, mmu_booke_kremove), 447 MMUMETHOD(mmu_unmapdev, mmu_booke_unmapdev), 448 MMUMETHOD(mmu_change_attr, mmu_booke_change_attr), 449 MMUMETHOD(mmu_map_user_ptr, mmu_booke_map_user_ptr), 450 MMUMETHOD(mmu_decode_kernel_ptr, mmu_booke_decode_kernel_ptr), 451 452 /* dumpsys() support */ 453 MMUMETHOD(mmu_dumpsys_map, mmu_booke_dumpsys_map), 454 MMUMETHOD(mmu_dumpsys_unmap, mmu_booke_dumpsys_unmap), 455 MMUMETHOD(mmu_scan_init, mmu_booke_scan_init), 456 457 { 0, 0 } 458 }; 459 460 MMU_DEF(booke_mmu, MMU_TYPE_BOOKE, mmu_booke_methods, 0); 461 462 static __inline uint32_t 463 tlb_calc_wimg(vm_paddr_t pa, vm_memattr_t ma) 464 { 465 uint32_t attrib; 466 int i; 467 468 if (ma != VM_MEMATTR_DEFAULT) { 469 switch (ma) { 470 case VM_MEMATTR_UNCACHEABLE: 471 return (MAS2_I | MAS2_G); 472 case VM_MEMATTR_WRITE_COMBINING: 473 case VM_MEMATTR_WRITE_BACK: 474 case VM_MEMATTR_PREFETCHABLE: 475 return (MAS2_I); 476 case VM_MEMATTR_WRITE_THROUGH: 477 return (MAS2_W | MAS2_M); 478 case VM_MEMATTR_CACHEABLE: 479 return (MAS2_M); 480 } 481 } 482 483 /* 484 * Assume the page is cache inhibited and access is guarded unless 485 * it's in our available memory array. 486 */ 487 attrib = _TLB_ENTRY_IO; 488 for (i = 0; i < physmem_regions_sz; i++) { 489 if ((pa >= physmem_regions[i].mr_start) && 490 (pa < (physmem_regions[i].mr_start + 491 physmem_regions[i].mr_size))) { 492 attrib = _TLB_ENTRY_MEM; 493 break; 494 } 495 } 496 497 return (attrib); 498 } 499 500 static inline void 501 tlb_miss_lock(void) 502 { 503 #ifdef SMP 504 struct pcpu *pc; 505 506 if (!smp_started) 507 return; 508 509 STAILQ_FOREACH(pc, &cpuhead, pc_allcpu) { 510 if (pc != pcpup) { 511 512 CTR3(KTR_PMAP, "%s: tlb miss LOCK of CPU=%d, " 513 "tlb_lock=%p", __func__, pc->pc_cpuid, pc->pc_booke.tlb_lock); 514 515 KASSERT((pc->pc_cpuid != PCPU_GET(cpuid)), 516 ("tlb_miss_lock: tried to lock self")); 517 518 tlb_lock(pc->pc_booke.tlb_lock); 519 520 CTR1(KTR_PMAP, "%s: locked", __func__); 521 } 522 } 523 #endif 524 } 525 526 static inline void 527 tlb_miss_unlock(void) 528 { 529 #ifdef SMP 530 struct pcpu *pc; 531 532 if (!smp_started) 533 return; 534 535 STAILQ_FOREACH(pc, &cpuhead, pc_allcpu) { 536 if (pc != pcpup) { 537 CTR2(KTR_PMAP, "%s: tlb miss UNLOCK of CPU=%d", 538 __func__, pc->pc_cpuid); 539 540 tlb_unlock(pc->pc_booke.tlb_lock); 541 542 CTR1(KTR_PMAP, "%s: unlocked", __func__); 543 } 544 } 545 #endif 546 } 547 548 /* Return number of entries in TLB0. */ 549 static __inline void 550 tlb0_get_tlbconf(void) 551 { 552 uint32_t tlb0_cfg; 553 554 tlb0_cfg = mfspr(SPR_TLB0CFG); 555 tlb0_entries = tlb0_cfg & TLBCFG_NENTRY_MASK; 556 tlb0_ways = (tlb0_cfg & TLBCFG_ASSOC_MASK) >> TLBCFG_ASSOC_SHIFT; 557 tlb0_entries_per_way = tlb0_entries / tlb0_ways; 558 } 559 560 /* Return number of entries in TLB1. */ 561 static __inline void 562 tlb1_get_tlbconf(void) 563 { 564 uint32_t tlb1_cfg; 565 566 tlb1_cfg = mfspr(SPR_TLB1CFG); 567 tlb1_entries = tlb1_cfg & TLBCFG_NENTRY_MASK; 568 } 569 570 /**************************************************************************/ 571 /* Page table related */ 572 /**************************************************************************/ 573 574 #ifdef __powerpc64__ 575 /* Initialize pool of kva ptbl buffers. */ 576 static void 577 ptbl_init(void) 578 { 579 } 580 581 /* Get a pointer to a PTE in a page table. */ 582 static __inline pte_t * 583 pte_find(mmu_t mmu, pmap_t pmap, vm_offset_t va) 584 { 585 pte_t **pdir; 586 pte_t *ptbl; 587 588 KASSERT((pmap != NULL), ("pte_find: invalid pmap")); 589 590 pdir = pmap->pm_pp2d[PP2D_IDX(va)]; 591 if (!pdir) 592 return NULL; 593 ptbl = pdir[PDIR_IDX(va)]; 594 return ((ptbl != NULL) ? &ptbl[PTBL_IDX(va)] : NULL); 595 } 596 597 /* 598 * allocate a page of pointers to page directories, do not preallocate the 599 * page tables 600 */ 601 static pte_t ** 602 pdir_alloc(mmu_t mmu, pmap_t pmap, unsigned int pp2d_idx, bool nosleep) 603 { 604 vm_page_t m; 605 pte_t **pdir; 606 int req; 607 608 req = VM_ALLOC_NOOBJ | VM_ALLOC_WIRED; 609 while ((m = vm_page_alloc(NULL, pp2d_idx, req)) == NULL) { 610 PMAP_UNLOCK(pmap); 611 if (nosleep) { 612 return (NULL); 613 } 614 vm_wait(NULL); 615 PMAP_LOCK(pmap); 616 } 617 618 /* Zero whole ptbl. */ 619 pdir = (pte_t **)PHYS_TO_DMAP(VM_PAGE_TO_PHYS(m)); 620 mmu_booke_zero_page(mmu, m); 621 622 return (pdir); 623 } 624 625 /* Free pdir pages and invalidate pdir entry. */ 626 static void 627 pdir_free(mmu_t mmu, pmap_t pmap, unsigned int pp2d_idx, vm_page_t m) 628 { 629 pte_t **pdir; 630 631 pdir = pmap->pm_pp2d[pp2d_idx]; 632 633 KASSERT((pdir != NULL), ("pdir_free: null pdir")); 634 635 pmap->pm_pp2d[pp2d_idx] = NULL; 636 637 vm_wire_sub(1); 638 vm_page_free_zero(m); 639 } 640 641 /* 642 * Decrement pdir pages hold count and attempt to free pdir pages. Called 643 * when removing directory entry from pdir. 644 * 645 * Return 1 if pdir pages were freed. 646 */ 647 static int 648 pdir_unhold(mmu_t mmu, pmap_t pmap, u_int pp2d_idx) 649 { 650 pte_t **pdir; 651 vm_paddr_t pa; 652 vm_page_t m; 653 654 KASSERT((pmap != kernel_pmap), 655 ("pdir_unhold: unholding kernel pdir!")); 656 657 pdir = pmap->pm_pp2d[pp2d_idx]; 658 659 /* decrement hold count */ 660 pa = DMAP_TO_PHYS((vm_offset_t) pdir); 661 m = PHYS_TO_VM_PAGE(pa); 662 663 /* 664 * Free pdir page if there are no dir entries in this pdir. 665 */ 666 m->ref_count--; 667 if (m->ref_count == 0) { 668 pdir_free(mmu, pmap, pp2d_idx, m); 669 return (1); 670 } 671 return (0); 672 } 673 674 /* 675 * Increment hold count for pdir pages. This routine is used when new ptlb 676 * entry is being inserted into pdir. 677 */ 678 static void 679 pdir_hold(mmu_t mmu, pmap_t pmap, pte_t ** pdir) 680 { 681 vm_page_t m; 682 683 KASSERT((pmap != kernel_pmap), 684 ("pdir_hold: holding kernel pdir!")); 685 686 KASSERT((pdir != NULL), ("pdir_hold: null pdir")); 687 688 m = PHYS_TO_VM_PAGE(DMAP_TO_PHYS((vm_offset_t)pdir)); 689 m->ref_count++; 690 } 691 692 /* Allocate page table. */ 693 static pte_t * 694 ptbl_alloc(mmu_t mmu, pmap_t pmap, pte_t ** pdir, unsigned int pdir_idx, 695 boolean_t nosleep) 696 { 697 vm_page_t m; 698 pte_t *ptbl; 699 int req; 700 701 KASSERT((pdir[pdir_idx] == NULL), 702 ("%s: valid ptbl entry exists!", __func__)); 703 704 req = VM_ALLOC_NOOBJ | VM_ALLOC_WIRED; 705 while ((m = vm_page_alloc(NULL, pdir_idx, req)) == NULL) { 706 PMAP_UNLOCK(pmap); 707 rw_wunlock(&pvh_global_lock); 708 if (nosleep) { 709 return (NULL); 710 } 711 vm_wait(NULL); 712 rw_wlock(&pvh_global_lock); 713 PMAP_LOCK(pmap); 714 } 715 716 /* Zero whole ptbl. */ 717 ptbl = (pte_t *)PHYS_TO_DMAP(VM_PAGE_TO_PHYS(m)); 718 mmu_booke_zero_page(mmu, m); 719 720 return (ptbl); 721 } 722 723 /* Free ptbl pages and invalidate pdir entry. */ 724 static void 725 ptbl_free(mmu_t mmu, pmap_t pmap, pte_t ** pdir, unsigned int pdir_idx, vm_page_t m) 726 { 727 pte_t *ptbl; 728 729 ptbl = pdir[pdir_idx]; 730 731 KASSERT((ptbl != NULL), ("ptbl_free: null ptbl")); 732 733 pdir[pdir_idx] = NULL; 734 735 vm_wire_sub(1); 736 vm_page_free_zero(m); 737 } 738 739 /* 740 * Decrement ptbl pages hold count and attempt to free ptbl pages. Called 741 * when removing pte entry from ptbl. 742 * 743 * Return 1 if ptbl pages were freed. 744 */ 745 static int 746 ptbl_unhold(mmu_t mmu, pmap_t pmap, vm_offset_t va) 747 { 748 pte_t *ptbl; 749 vm_page_t m; 750 u_int pp2d_idx; 751 pte_t **pdir; 752 u_int pdir_idx; 753 754 pp2d_idx = PP2D_IDX(va); 755 pdir_idx = PDIR_IDX(va); 756 757 KASSERT((pmap != kernel_pmap), 758 ("ptbl_unhold: unholding kernel ptbl!")); 759 760 pdir = pmap->pm_pp2d[pp2d_idx]; 761 ptbl = pdir[pdir_idx]; 762 763 /* decrement hold count */ 764 m = PHYS_TO_VM_PAGE(DMAP_TO_PHYS((vm_offset_t) ptbl)); 765 766 /* 767 * Free ptbl pages if there are no pte entries in this ptbl. 768 * ref_count has the same value for all ptbl pages, so check the 769 * last page. 770 */ 771 m->ref_count--; 772 if (m->ref_count == 0) { 773 ptbl_free(mmu, pmap, pdir, pdir_idx, m); 774 pdir_unhold(mmu, pmap, pp2d_idx); 775 return (1); 776 } 777 return (0); 778 } 779 780 /* 781 * Increment hold count for ptbl pages. This routine is used when new pte 782 * entry is being inserted into ptbl. 783 */ 784 static void 785 ptbl_hold(mmu_t mmu, pmap_t pmap, pte_t ** pdir, unsigned int pdir_idx) 786 { 787 pte_t *ptbl; 788 vm_page_t m; 789 790 KASSERT((pmap != kernel_pmap), 791 ("ptbl_hold: holding kernel ptbl!")); 792 793 ptbl = pdir[pdir_idx]; 794 795 KASSERT((ptbl != NULL), ("ptbl_hold: null ptbl")); 796 797 m = PHYS_TO_VM_PAGE(DMAP_TO_PHYS((vm_offset_t) ptbl)); 798 m->ref_count++; 799 } 800 #else 801 802 /* Initialize pool of kva ptbl buffers. */ 803 static void 804 ptbl_init(void) 805 { 806 int i; 807 808 CTR3(KTR_PMAP, "%s: s (ptbl_bufs = 0x%08x size 0x%08x)", __func__, 809 (uint32_t)ptbl_bufs, sizeof(struct ptbl_buf) * PTBL_BUFS); 810 CTR3(KTR_PMAP, "%s: s (ptbl_buf_pool_vabase = 0x%08x size = 0x%08x)", 811 __func__, ptbl_buf_pool_vabase, PTBL_BUFS * PTBL_PAGES * PAGE_SIZE); 812 813 mtx_init(&ptbl_buf_freelist_lock, "ptbl bufs lock", NULL, MTX_DEF); 814 TAILQ_INIT(&ptbl_buf_freelist); 815 816 for (i = 0; i < PTBL_BUFS; i++) { 817 ptbl_bufs[i].kva = 818 ptbl_buf_pool_vabase + i * PTBL_PAGES * PAGE_SIZE; 819 TAILQ_INSERT_TAIL(&ptbl_buf_freelist, &ptbl_bufs[i], link); 820 } 821 } 822 823 /* Get a ptbl_buf from the freelist. */ 824 static struct ptbl_buf * 825 ptbl_buf_alloc(void) 826 { 827 struct ptbl_buf *buf; 828 829 mtx_lock(&ptbl_buf_freelist_lock); 830 buf = TAILQ_FIRST(&ptbl_buf_freelist); 831 if (buf != NULL) 832 TAILQ_REMOVE(&ptbl_buf_freelist, buf, link); 833 mtx_unlock(&ptbl_buf_freelist_lock); 834 835 CTR2(KTR_PMAP, "%s: buf = %p", __func__, buf); 836 837 return (buf); 838 } 839 840 /* Return ptbl buff to free pool. */ 841 static void 842 ptbl_buf_free(struct ptbl_buf *buf) 843 { 844 845 CTR2(KTR_PMAP, "%s: buf = %p", __func__, buf); 846 847 mtx_lock(&ptbl_buf_freelist_lock); 848 TAILQ_INSERT_TAIL(&ptbl_buf_freelist, buf, link); 849 mtx_unlock(&ptbl_buf_freelist_lock); 850 } 851 852 /* 853 * Search the list of allocated ptbl bufs and find on list of allocated ptbls 854 */ 855 static void 856 ptbl_free_pmap_ptbl(pmap_t pmap, pte_t *ptbl) 857 { 858 struct ptbl_buf *pbuf; 859 860 CTR2(KTR_PMAP, "%s: ptbl = %p", __func__, ptbl); 861 862 PMAP_LOCK_ASSERT(pmap, MA_OWNED); 863 864 TAILQ_FOREACH(pbuf, &pmap->pm_ptbl_list, link) 865 if (pbuf->kva == (vm_offset_t)ptbl) { 866 /* Remove from pmap ptbl buf list. */ 867 TAILQ_REMOVE(&pmap->pm_ptbl_list, pbuf, link); 868 869 /* Free corresponding ptbl buf. */ 870 ptbl_buf_free(pbuf); 871 break; 872 } 873 } 874 875 /* Allocate page table. */ 876 static pte_t * 877 ptbl_alloc(mmu_t mmu, pmap_t pmap, unsigned int pdir_idx, boolean_t nosleep) 878 { 879 vm_page_t mtbl[PTBL_PAGES]; 880 vm_page_t m; 881 struct ptbl_buf *pbuf; 882 unsigned int pidx; 883 pte_t *ptbl; 884 int i, j; 885 886 CTR4(KTR_PMAP, "%s: pmap = %p su = %d pdir_idx = %d", __func__, pmap, 887 (pmap == kernel_pmap), pdir_idx); 888 889 KASSERT((pdir_idx <= (VM_MAXUSER_ADDRESS / PDIR_SIZE)), 890 ("ptbl_alloc: invalid pdir_idx")); 891 KASSERT((pmap->pm_pdir[pdir_idx] == NULL), 892 ("pte_alloc: valid ptbl entry exists!")); 893 894 pbuf = ptbl_buf_alloc(); 895 if (pbuf == NULL) 896 panic("pte_alloc: couldn't alloc kernel virtual memory"); 897 898 ptbl = (pte_t *)pbuf->kva; 899 900 CTR2(KTR_PMAP, "%s: ptbl kva = %p", __func__, ptbl); 901 902 for (i = 0; i < PTBL_PAGES; i++) { 903 pidx = (PTBL_PAGES * pdir_idx) + i; 904 while ((m = vm_page_alloc(NULL, pidx, 905 VM_ALLOC_NOOBJ | VM_ALLOC_WIRED)) == NULL) { 906 PMAP_UNLOCK(pmap); 907 rw_wunlock(&pvh_global_lock); 908 if (nosleep) { 909 ptbl_free_pmap_ptbl(pmap, ptbl); 910 for (j = 0; j < i; j++) 911 vm_page_free(mtbl[j]); 912 vm_wire_sub(i); 913 return (NULL); 914 } 915 vm_wait(NULL); 916 rw_wlock(&pvh_global_lock); 917 PMAP_LOCK(pmap); 918 } 919 mtbl[i] = m; 920 } 921 922 /* Map allocated pages into kernel_pmap. */ 923 mmu_booke_qenter(mmu, (vm_offset_t)ptbl, mtbl, PTBL_PAGES); 924 925 /* Zero whole ptbl. */ 926 bzero((caddr_t)ptbl, PTBL_PAGES * PAGE_SIZE); 927 928 /* Add pbuf to the pmap ptbl bufs list. */ 929 TAILQ_INSERT_TAIL(&pmap->pm_ptbl_list, pbuf, link); 930 931 return (ptbl); 932 } 933 934 /* Free ptbl pages and invalidate pdir entry. */ 935 static void 936 ptbl_free(mmu_t mmu, pmap_t pmap, unsigned int pdir_idx) 937 { 938 pte_t *ptbl; 939 vm_paddr_t pa; 940 vm_offset_t va; 941 vm_page_t m; 942 int i; 943 944 CTR4(KTR_PMAP, "%s: pmap = %p su = %d pdir_idx = %d", __func__, pmap, 945 (pmap == kernel_pmap), pdir_idx); 946 947 KASSERT((pdir_idx <= (VM_MAXUSER_ADDRESS / PDIR_SIZE)), 948 ("ptbl_free: invalid pdir_idx")); 949 950 ptbl = pmap->pm_pdir[pdir_idx]; 951 952 CTR2(KTR_PMAP, "%s: ptbl = %p", __func__, ptbl); 953 954 KASSERT((ptbl != NULL), ("ptbl_free: null ptbl")); 955 956 /* 957 * Invalidate the pdir entry as soon as possible, so that other CPUs 958 * don't attempt to look up the page tables we are releasing. 959 */ 960 mtx_lock_spin(&tlbivax_mutex); 961 tlb_miss_lock(); 962 963 pmap->pm_pdir[pdir_idx] = NULL; 964 965 tlb_miss_unlock(); 966 mtx_unlock_spin(&tlbivax_mutex); 967 968 for (i = 0; i < PTBL_PAGES; i++) { 969 va = ((vm_offset_t)ptbl + (i * PAGE_SIZE)); 970 pa = pte_vatopa(mmu, kernel_pmap, va); 971 m = PHYS_TO_VM_PAGE(pa); 972 vm_page_free_zero(m); 973 vm_wire_sub(1); 974 mmu_booke_kremove(mmu, va); 975 } 976 977 ptbl_free_pmap_ptbl(pmap, ptbl); 978 } 979 980 /* 981 * Decrement ptbl pages hold count and attempt to free ptbl pages. 982 * Called when removing pte entry from ptbl. 983 * 984 * Return 1 if ptbl pages were freed. 985 */ 986 static int 987 ptbl_unhold(mmu_t mmu, pmap_t pmap, unsigned int pdir_idx) 988 { 989 pte_t *ptbl; 990 vm_paddr_t pa; 991 vm_page_t m; 992 int i; 993 994 CTR4(KTR_PMAP, "%s: pmap = %p su = %d pdir_idx = %d", __func__, pmap, 995 (pmap == kernel_pmap), pdir_idx); 996 997 KASSERT((pdir_idx <= (VM_MAXUSER_ADDRESS / PDIR_SIZE)), 998 ("ptbl_unhold: invalid pdir_idx")); 999 KASSERT((pmap != kernel_pmap), 1000 ("ptbl_unhold: unholding kernel ptbl!")); 1001 1002 ptbl = pmap->pm_pdir[pdir_idx]; 1003 1004 //debugf("ptbl_unhold: ptbl = 0x%08x\n", (u_int32_t)ptbl); 1005 KASSERT(((vm_offset_t)ptbl >= VM_MIN_KERNEL_ADDRESS), 1006 ("ptbl_unhold: non kva ptbl")); 1007 1008 /* decrement hold count */ 1009 for (i = 0; i < PTBL_PAGES; i++) { 1010 pa = pte_vatopa(mmu, kernel_pmap, 1011 (vm_offset_t)ptbl + (i * PAGE_SIZE)); 1012 m = PHYS_TO_VM_PAGE(pa); 1013 m->ref_count--; 1014 } 1015 1016 /* 1017 * Free ptbl pages if there are no pte etries in this ptbl. 1018 * ref_count has the same value for all ptbl pages, so check the last 1019 * page. 1020 */ 1021 if (m->ref_count == 0) { 1022 ptbl_free(mmu, pmap, pdir_idx); 1023 1024 //debugf("ptbl_unhold: e (freed ptbl)\n"); 1025 return (1); 1026 } 1027 1028 return (0); 1029 } 1030 1031 /* 1032 * Increment hold count for ptbl pages. This routine is used when a new pte 1033 * entry is being inserted into the ptbl. 1034 */ 1035 static void 1036 ptbl_hold(mmu_t mmu, pmap_t pmap, unsigned int pdir_idx) 1037 { 1038 vm_paddr_t pa; 1039 pte_t *ptbl; 1040 vm_page_t m; 1041 int i; 1042 1043 CTR3(KTR_PMAP, "%s: pmap = %p pdir_idx = %d", __func__, pmap, 1044 pdir_idx); 1045 1046 KASSERT((pdir_idx <= (VM_MAXUSER_ADDRESS / PDIR_SIZE)), 1047 ("ptbl_hold: invalid pdir_idx")); 1048 KASSERT((pmap != kernel_pmap), 1049 ("ptbl_hold: holding kernel ptbl!")); 1050 1051 ptbl = pmap->pm_pdir[pdir_idx]; 1052 1053 KASSERT((ptbl != NULL), ("ptbl_hold: null ptbl")); 1054 1055 for (i = 0; i < PTBL_PAGES; i++) { 1056 pa = pte_vatopa(mmu, kernel_pmap, 1057 (vm_offset_t)ptbl + (i * PAGE_SIZE)); 1058 m = PHYS_TO_VM_PAGE(pa); 1059 m->ref_count++; 1060 } 1061 } 1062 #endif 1063 1064 /* Allocate pv_entry structure. */ 1065 pv_entry_t 1066 pv_alloc(void) 1067 { 1068 pv_entry_t pv; 1069 1070 pv_entry_count++; 1071 if (pv_entry_count > pv_entry_high_water) 1072 pagedaemon_wakeup(0); /* XXX powerpc NUMA */ 1073 pv = uma_zalloc(pvzone, M_NOWAIT); 1074 1075 return (pv); 1076 } 1077 1078 /* Free pv_entry structure. */ 1079 static __inline void 1080 pv_free(pv_entry_t pve) 1081 { 1082 1083 pv_entry_count--; 1084 uma_zfree(pvzone, pve); 1085 } 1086 1087 1088 /* Allocate and initialize pv_entry structure. */ 1089 static void 1090 pv_insert(pmap_t pmap, vm_offset_t va, vm_page_t m) 1091 { 1092 pv_entry_t pve; 1093 1094 //int su = (pmap == kernel_pmap); 1095 //debugf("pv_insert: s (su = %d pmap = 0x%08x va = 0x%08x m = 0x%08x)\n", su, 1096 // (u_int32_t)pmap, va, (u_int32_t)m); 1097 1098 pve = pv_alloc(); 1099 if (pve == NULL) 1100 panic("pv_insert: no pv entries!"); 1101 1102 pve->pv_pmap = pmap; 1103 pve->pv_va = va; 1104 1105 /* add to pv_list */ 1106 PMAP_LOCK_ASSERT(pmap, MA_OWNED); 1107 rw_assert(&pvh_global_lock, RA_WLOCKED); 1108 1109 TAILQ_INSERT_TAIL(&m->md.pv_list, pve, pv_link); 1110 1111 //debugf("pv_insert: e\n"); 1112 } 1113 1114 /* Destroy pv entry. */ 1115 static void 1116 pv_remove(pmap_t pmap, vm_offset_t va, vm_page_t m) 1117 { 1118 pv_entry_t pve; 1119 1120 //int su = (pmap == kernel_pmap); 1121 //debugf("pv_remove: s (su = %d pmap = 0x%08x va = 0x%08x)\n", su, (u_int32_t)pmap, va); 1122 1123 PMAP_LOCK_ASSERT(pmap, MA_OWNED); 1124 rw_assert(&pvh_global_lock, RA_WLOCKED); 1125 1126 /* find pv entry */ 1127 TAILQ_FOREACH(pve, &m->md.pv_list, pv_link) { 1128 if ((pmap == pve->pv_pmap) && (va == pve->pv_va)) { 1129 /* remove from pv_list */ 1130 TAILQ_REMOVE(&m->md.pv_list, pve, pv_link); 1131 if (TAILQ_EMPTY(&m->md.pv_list)) 1132 vm_page_aflag_clear(m, PGA_WRITEABLE); 1133 1134 /* free pv entry struct */ 1135 pv_free(pve); 1136 break; 1137 } 1138 } 1139 1140 //debugf("pv_remove: e\n"); 1141 } 1142 1143 #ifdef __powerpc64__ 1144 /* 1145 * Clean pte entry, try to free page table page if requested. 1146 * 1147 * Return 1 if ptbl pages were freed, otherwise return 0. 1148 */ 1149 static int 1150 pte_remove(mmu_t mmu, pmap_t pmap, vm_offset_t va, u_int8_t flags) 1151 { 1152 vm_page_t m; 1153 pte_t *pte; 1154 1155 pte = pte_find(mmu, pmap, va); 1156 KASSERT(pte != NULL, ("%s: NULL pte", __func__)); 1157 1158 if (!PTE_ISVALID(pte)) 1159 return (0); 1160 1161 /* Get vm_page_t for mapped pte. */ 1162 m = PHYS_TO_VM_PAGE(PTE_PA(pte)); 1163 1164 if (PTE_ISWIRED(pte)) 1165 pmap->pm_stats.wired_count--; 1166 1167 /* Handle managed entry. */ 1168 if (PTE_ISMANAGED(pte)) { 1169 1170 /* Handle modified pages. */ 1171 if (PTE_ISMODIFIED(pte)) 1172 vm_page_dirty(m); 1173 1174 /* Referenced pages. */ 1175 if (PTE_ISREFERENCED(pte)) 1176 vm_page_aflag_set(m, PGA_REFERENCED); 1177 1178 /* Remove pv_entry from pv_list. */ 1179 pv_remove(pmap, va, m); 1180 } else if (pmap == kernel_pmap && m && m->md.pv_tracked) { 1181 pv_remove(pmap, va, m); 1182 if (TAILQ_EMPTY(&m->md.pv_list)) 1183 m->md.pv_tracked = false; 1184 } 1185 mtx_lock_spin(&tlbivax_mutex); 1186 tlb_miss_lock(); 1187 1188 tlb0_flush_entry(va); 1189 *pte = 0; 1190 1191 tlb_miss_unlock(); 1192 mtx_unlock_spin(&tlbivax_mutex); 1193 1194 pmap->pm_stats.resident_count--; 1195 1196 if (flags & PTBL_UNHOLD) { 1197 return (ptbl_unhold(mmu, pmap, va)); 1198 } 1199 return (0); 1200 } 1201 1202 /* 1203 * Insert PTE for a given page and virtual address. 1204 */ 1205 static int 1206 pte_enter(mmu_t mmu, pmap_t pmap, vm_page_t m, vm_offset_t va, uint32_t flags, 1207 boolean_t nosleep) 1208 { 1209 unsigned int pp2d_idx = PP2D_IDX(va); 1210 unsigned int pdir_idx = PDIR_IDX(va); 1211 unsigned int ptbl_idx = PTBL_IDX(va); 1212 pte_t *ptbl, *pte, pte_tmp; 1213 pte_t **pdir; 1214 1215 /* Get the page directory pointer. */ 1216 pdir = pmap->pm_pp2d[pp2d_idx]; 1217 if (pdir == NULL) 1218 pdir = pdir_alloc(mmu, pmap, pp2d_idx, nosleep); 1219 1220 /* Get the page table pointer. */ 1221 ptbl = pdir[pdir_idx]; 1222 1223 if (ptbl == NULL) { 1224 /* Allocate page table pages. */ 1225 ptbl = ptbl_alloc(mmu, pmap, pdir, pdir_idx, nosleep); 1226 if (ptbl == NULL) { 1227 KASSERT(nosleep, ("nosleep and NULL ptbl")); 1228 return (ENOMEM); 1229 } 1230 pte = &ptbl[ptbl_idx]; 1231 } else { 1232 /* 1233 * Check if there is valid mapping for requested va, if there 1234 * is, remove it. 1235 */ 1236 pte = &ptbl[ptbl_idx]; 1237 if (PTE_ISVALID(pte)) { 1238 pte_remove(mmu, pmap, va, PTBL_HOLD); 1239 } else { 1240 /* 1241 * pte is not used, increment hold count for ptbl 1242 * pages. 1243 */ 1244 if (pmap != kernel_pmap) 1245 ptbl_hold(mmu, pmap, pdir, pdir_idx); 1246 } 1247 } 1248 1249 if (pdir[pdir_idx] == NULL) { 1250 if (pmap != kernel_pmap && pmap->pm_pp2d[pp2d_idx] != NULL) 1251 pdir_hold(mmu, pmap, pdir); 1252 pdir[pdir_idx] = ptbl; 1253 } 1254 if (pmap->pm_pp2d[pp2d_idx] == NULL) 1255 pmap->pm_pp2d[pp2d_idx] = pdir; 1256 1257 /* 1258 * Insert pv_entry into pv_list for mapped page if part of managed 1259 * memory. 1260 */ 1261 if ((m->oflags & VPO_UNMANAGED) == 0) { 1262 flags |= PTE_MANAGED; 1263 1264 /* Create and insert pv entry. */ 1265 pv_insert(pmap, va, m); 1266 } 1267 1268 pmap->pm_stats.resident_count++; 1269 1270 pte_tmp = PTE_RPN_FROM_PA(VM_PAGE_TO_PHYS(m)); 1271 pte_tmp |= (PTE_VALID | flags); 1272 1273 mtx_lock_spin(&tlbivax_mutex); 1274 tlb_miss_lock(); 1275 1276 tlb0_flush_entry(va); 1277 *pte = pte_tmp; 1278 1279 tlb_miss_unlock(); 1280 mtx_unlock_spin(&tlbivax_mutex); 1281 1282 return (0); 1283 } 1284 1285 /* Return the pa for the given pmap/va. */ 1286 static vm_paddr_t 1287 pte_vatopa(mmu_t mmu, pmap_t pmap, vm_offset_t va) 1288 { 1289 vm_paddr_t pa = 0; 1290 pte_t *pte; 1291 1292 pte = pte_find(mmu, pmap, va); 1293 if ((pte != NULL) && PTE_ISVALID(pte)) 1294 pa = (PTE_PA(pte) | (va & PTE_PA_MASK)); 1295 return (pa); 1296 } 1297 1298 1299 /* allocate pte entries to manage (addr & mask) to (addr & mask) + size */ 1300 static void 1301 kernel_pte_alloc(vm_offset_t data_end, vm_offset_t addr, vm_offset_t pdir) 1302 { 1303 int i, j; 1304 vm_offset_t va; 1305 pte_t *pte; 1306 1307 va = addr; 1308 /* Initialize kernel pdir */ 1309 for (i = 0; i < kernel_pdirs; i++) { 1310 kernel_pmap->pm_pp2d[i + PP2D_IDX(va)] = 1311 (pte_t **)(pdir + (i * PAGE_SIZE * PDIR_PAGES)); 1312 for (j = PDIR_IDX(va + (i * PAGE_SIZE * PDIR_NENTRIES * PTBL_NENTRIES)); 1313 j < PDIR_NENTRIES; j++) { 1314 kernel_pmap->pm_pp2d[i + PP2D_IDX(va)][j] = 1315 (pte_t *)(pdir + (kernel_pdirs * PAGE_SIZE) + 1316 (((i * PDIR_NENTRIES) + j) * PAGE_SIZE)); 1317 } 1318 } 1319 1320 /* 1321 * Fill in PTEs covering kernel code and data. They are not required 1322 * for address translation, as this area is covered by static TLB1 1323 * entries, but for pte_vatopa() to work correctly with kernel area 1324 * addresses. 1325 */ 1326 for (va = addr; va < data_end; va += PAGE_SIZE) { 1327 pte = &(kernel_pmap->pm_pp2d[PP2D_IDX(va)][PDIR_IDX(va)][PTBL_IDX(va)]); 1328 *pte = PTE_RPN_FROM_PA(kernload + (va - kernstart)); 1329 *pte |= PTE_M | PTE_SR | PTE_SW | PTE_SX | PTE_WIRED | 1330 PTE_VALID | PTE_PS_4KB; 1331 } 1332 } 1333 #else 1334 /* 1335 * Clean pte entry, try to free page table page if requested. 1336 * 1337 * Return 1 if ptbl pages were freed, otherwise return 0. 1338 */ 1339 static int 1340 pte_remove(mmu_t mmu, pmap_t pmap, vm_offset_t va, uint8_t flags) 1341 { 1342 unsigned int pdir_idx = PDIR_IDX(va); 1343 unsigned int ptbl_idx = PTBL_IDX(va); 1344 vm_page_t m; 1345 pte_t *ptbl; 1346 pte_t *pte; 1347 1348 //int su = (pmap == kernel_pmap); 1349 //debugf("pte_remove: s (su = %d pmap = 0x%08x va = 0x%08x flags = %d)\n", 1350 // su, (u_int32_t)pmap, va, flags); 1351 1352 ptbl = pmap->pm_pdir[pdir_idx]; 1353 KASSERT(ptbl, ("pte_remove: null ptbl")); 1354 1355 pte = &ptbl[ptbl_idx]; 1356 1357 if (pte == NULL || !PTE_ISVALID(pte)) 1358 return (0); 1359 1360 if (PTE_ISWIRED(pte)) 1361 pmap->pm_stats.wired_count--; 1362 1363 /* Get vm_page_t for mapped pte. */ 1364 m = PHYS_TO_VM_PAGE(PTE_PA(pte)); 1365 1366 /* Handle managed entry. */ 1367 if (PTE_ISMANAGED(pte)) { 1368 1369 if (PTE_ISMODIFIED(pte)) 1370 vm_page_dirty(m); 1371 1372 if (PTE_ISREFERENCED(pte)) 1373 vm_page_aflag_set(m, PGA_REFERENCED); 1374 1375 pv_remove(pmap, va, m); 1376 } else if (pmap == kernel_pmap && m && m->md.pv_tracked) { 1377 /* 1378 * Always pv_insert()/pv_remove() on MPC85XX, in case DPAA is 1379 * used. This is needed by the NCSW support code for fast 1380 * VA<->PA translation. 1381 */ 1382 pv_remove(pmap, va, m); 1383 if (TAILQ_EMPTY(&m->md.pv_list)) 1384 m->md.pv_tracked = false; 1385 } 1386 1387 mtx_lock_spin(&tlbivax_mutex); 1388 tlb_miss_lock(); 1389 1390 tlb0_flush_entry(va); 1391 *pte = 0; 1392 1393 tlb_miss_unlock(); 1394 mtx_unlock_spin(&tlbivax_mutex); 1395 1396 pmap->pm_stats.resident_count--; 1397 1398 if (flags & PTBL_UNHOLD) { 1399 //debugf("pte_remove: e (unhold)\n"); 1400 return (ptbl_unhold(mmu, pmap, pdir_idx)); 1401 } 1402 1403 //debugf("pte_remove: e\n"); 1404 return (0); 1405 } 1406 1407 /* 1408 * Insert PTE for a given page and virtual address. 1409 */ 1410 static int 1411 pte_enter(mmu_t mmu, pmap_t pmap, vm_page_t m, vm_offset_t va, uint32_t flags, 1412 boolean_t nosleep) 1413 { 1414 unsigned int pdir_idx = PDIR_IDX(va); 1415 unsigned int ptbl_idx = PTBL_IDX(va); 1416 pte_t *ptbl, *pte, pte_tmp; 1417 1418 CTR4(KTR_PMAP, "%s: su = %d pmap = %p va = %p", __func__, 1419 pmap == kernel_pmap, pmap, va); 1420 1421 /* Get the page table pointer. */ 1422 ptbl = pmap->pm_pdir[pdir_idx]; 1423 1424 if (ptbl == NULL) { 1425 /* Allocate page table pages. */ 1426 ptbl = ptbl_alloc(mmu, pmap, pdir_idx, nosleep); 1427 if (ptbl == NULL) { 1428 KASSERT(nosleep, ("nosleep and NULL ptbl")); 1429 return (ENOMEM); 1430 } 1431 pmap->pm_pdir[pdir_idx] = ptbl; 1432 pte = &ptbl[ptbl_idx]; 1433 } else { 1434 /* 1435 * Check if there is valid mapping for requested 1436 * va, if there is, remove it. 1437 */ 1438 pte = &pmap->pm_pdir[pdir_idx][ptbl_idx]; 1439 if (PTE_ISVALID(pte)) { 1440 pte_remove(mmu, pmap, va, PTBL_HOLD); 1441 } else { 1442 /* 1443 * pte is not used, increment hold count 1444 * for ptbl pages. 1445 */ 1446 if (pmap != kernel_pmap) 1447 ptbl_hold(mmu, pmap, pdir_idx); 1448 } 1449 } 1450 1451 /* 1452 * Insert pv_entry into pv_list for mapped page if part of managed 1453 * memory. 1454 */ 1455 if ((m->oflags & VPO_UNMANAGED) == 0) { 1456 flags |= PTE_MANAGED; 1457 1458 /* Create and insert pv entry. */ 1459 pv_insert(pmap, va, m); 1460 } 1461 1462 pmap->pm_stats.resident_count++; 1463 1464 pte_tmp = PTE_RPN_FROM_PA(VM_PAGE_TO_PHYS(m)); 1465 pte_tmp |= (PTE_VALID | flags | PTE_PS_4KB); /* 4KB pages only */ 1466 1467 mtx_lock_spin(&tlbivax_mutex); 1468 tlb_miss_lock(); 1469 1470 tlb0_flush_entry(va); 1471 *pte = pte_tmp; 1472 1473 tlb_miss_unlock(); 1474 mtx_unlock_spin(&tlbivax_mutex); 1475 return (0); 1476 } 1477 1478 /* Return the pa for the given pmap/va. */ 1479 static vm_paddr_t 1480 pte_vatopa(mmu_t mmu, pmap_t pmap, vm_offset_t va) 1481 { 1482 vm_paddr_t pa = 0; 1483 pte_t *pte; 1484 1485 pte = pte_find(mmu, pmap, va); 1486 if ((pte != NULL) && PTE_ISVALID(pte)) 1487 pa = (PTE_PA(pte) | (va & PTE_PA_MASK)); 1488 return (pa); 1489 } 1490 1491 /* Get a pointer to a PTE in a page table. */ 1492 static pte_t * 1493 pte_find(mmu_t mmu, pmap_t pmap, vm_offset_t va) 1494 { 1495 unsigned int pdir_idx = PDIR_IDX(va); 1496 unsigned int ptbl_idx = PTBL_IDX(va); 1497 1498 KASSERT((pmap != NULL), ("pte_find: invalid pmap")); 1499 1500 if (pmap->pm_pdir[pdir_idx]) 1501 return (&(pmap->pm_pdir[pdir_idx][ptbl_idx])); 1502 1503 return (NULL); 1504 } 1505 1506 /* Set up kernel page tables. */ 1507 static void 1508 kernel_pte_alloc(vm_offset_t data_end, vm_offset_t addr, vm_offset_t pdir) 1509 { 1510 int i; 1511 vm_offset_t va; 1512 pte_t *pte; 1513 1514 /* Initialize kernel pdir */ 1515 for (i = 0; i < kernel_ptbls; i++) 1516 kernel_pmap->pm_pdir[kptbl_min + i] = 1517 (pte_t *)(pdir + (i * PAGE_SIZE * PTBL_PAGES)); 1518 1519 /* 1520 * Fill in PTEs covering kernel code and data. They are not required 1521 * for address translation, as this area is covered by static TLB1 1522 * entries, but for pte_vatopa() to work correctly with kernel area 1523 * addresses. 1524 */ 1525 for (va = addr; va < data_end; va += PAGE_SIZE) { 1526 pte = &(kernel_pmap->pm_pdir[PDIR_IDX(va)][PTBL_IDX(va)]); 1527 *pte = PTE_RPN_FROM_PA(kernload + (va - kernstart)); 1528 *pte |= PTE_M | PTE_SR | PTE_SW | PTE_SX | PTE_WIRED | 1529 PTE_VALID | PTE_PS_4KB; 1530 } 1531 } 1532 #endif 1533 1534 /**************************************************************************/ 1535 /* PMAP related */ 1536 /**************************************************************************/ 1537 1538 /* 1539 * This is called during booke_init, before the system is really initialized. 1540 */ 1541 static void 1542 mmu_booke_bootstrap(mmu_t mmu, vm_offset_t start, vm_offset_t kernelend) 1543 { 1544 vm_paddr_t phys_kernelend; 1545 struct mem_region *mp, *mp1; 1546 int cnt, i, j; 1547 vm_paddr_t s, e, sz; 1548 vm_paddr_t physsz, hwphyssz; 1549 u_int phys_avail_count; 1550 vm_size_t kstack0_sz; 1551 vm_offset_t kernel_pdir, kstack0; 1552 vm_paddr_t kstack0_phys; 1553 void *dpcpu; 1554 vm_offset_t kernel_ptbl_root; 1555 1556 debugf("mmu_booke_bootstrap: entered\n"); 1557 1558 /* Set interesting system properties */ 1559 #ifdef __powerpc64__ 1560 hw_direct_map = 1; 1561 #else 1562 hw_direct_map = 0; 1563 #endif 1564 #if defined(COMPAT_FREEBSD32) || !defined(__powerpc64__) 1565 elf32_nxstack = 1; 1566 #endif 1567 1568 /* Initialize invalidation mutex */ 1569 mtx_init(&tlbivax_mutex, "tlbivax", NULL, MTX_SPIN); 1570 1571 /* Read TLB0 size and associativity. */ 1572 tlb0_get_tlbconf(); 1573 1574 /* 1575 * Align kernel start and end address (kernel image). 1576 * Note that kernel end does not necessarily relate to kernsize. 1577 * kernsize is the size of the kernel that is actually mapped. 1578 */ 1579 data_start = round_page(kernelend); 1580 data_end = data_start; 1581 1582 /* Allocate the dynamic per-cpu area. */ 1583 dpcpu = (void *)data_end; 1584 data_end += DPCPU_SIZE; 1585 1586 /* Allocate space for the message buffer. */ 1587 msgbufp = (struct msgbuf *)data_end; 1588 data_end += msgbufsize; 1589 debugf(" msgbufp at 0x%"PRI0ptrX" end = 0x%"PRI0ptrX"\n", 1590 (uintptr_t)msgbufp, data_end); 1591 1592 data_end = round_page(data_end); 1593 1594 #ifdef __powerpc64__ 1595 kernel_ptbl_root = data_end; 1596 data_end += PP2D_NENTRIES * sizeof(pte_t**); 1597 #else 1598 /* Allocate space for ptbl_bufs. */ 1599 ptbl_bufs = (struct ptbl_buf *)data_end; 1600 data_end += sizeof(struct ptbl_buf) * PTBL_BUFS; 1601 debugf(" ptbl_bufs at 0x%"PRI0ptrX" end = 0x%"PRI0ptrX"\n", 1602 (uintptr_t)ptbl_bufs, data_end); 1603 1604 data_end = round_page(data_end); 1605 kernel_ptbl_root = data_end; 1606 data_end += PDIR_NENTRIES * sizeof(pte_t*); 1607 #endif 1608 1609 /* Allocate PTE tables for kernel KVA. */ 1610 kernel_pdir = data_end; 1611 kernel_ptbls = howmany(VM_MAX_KERNEL_ADDRESS - VM_MIN_KERNEL_ADDRESS, 1612 PDIR_SIZE); 1613 #ifdef __powerpc64__ 1614 kernel_pdirs = howmany(kernel_ptbls, PDIR_NENTRIES); 1615 data_end += kernel_pdirs * PDIR_PAGES * PAGE_SIZE; 1616 #endif 1617 data_end += kernel_ptbls * PTBL_PAGES * PAGE_SIZE; 1618 debugf(" kernel ptbls: %d\n", kernel_ptbls); 1619 debugf(" kernel pdir at 0x%"PRI0ptrX" end = 0x%"PRI0ptrX"\n", 1620 kernel_pdir, data_end); 1621 1622 debugf(" data_end: 0x%"PRI0ptrX"\n", data_end); 1623 if (data_end - kernstart > kernsize) { 1624 kernsize += tlb1_mapin_region(kernstart + kernsize, 1625 kernload + kernsize, (data_end - kernstart) - kernsize); 1626 } 1627 data_end = kernstart + kernsize; 1628 debugf(" updated data_end: 0x%"PRI0ptrX"\n", data_end); 1629 1630 /* 1631 * Clear the structures - note we can only do it safely after the 1632 * possible additional TLB1 translations are in place (above) so that 1633 * all range up to the currently calculated 'data_end' is covered. 1634 */ 1635 dpcpu_init(dpcpu, 0); 1636 #ifdef __powerpc64__ 1637 memset((void *)kernel_pdir, 0, 1638 kernel_pdirs * PDIR_PAGES * PAGE_SIZE + 1639 kernel_ptbls * PTBL_PAGES * PAGE_SIZE); 1640 #else 1641 memset((void *)ptbl_bufs, 0, sizeof(struct ptbl_buf) * PTBL_SIZE); 1642 memset((void *)kernel_pdir, 0, kernel_ptbls * PTBL_PAGES * PAGE_SIZE); 1643 #endif 1644 1645 /*******************************************************/ 1646 /* Set the start and end of kva. */ 1647 /*******************************************************/ 1648 virtual_avail = round_page(data_end); 1649 virtual_end = VM_MAX_KERNEL_ADDRESS; 1650 1651 #ifndef __powerpc64__ 1652 /* Allocate KVA space for page zero/copy operations. */ 1653 zero_page_va = virtual_avail; 1654 virtual_avail += PAGE_SIZE; 1655 copy_page_src_va = virtual_avail; 1656 virtual_avail += PAGE_SIZE; 1657 copy_page_dst_va = virtual_avail; 1658 virtual_avail += PAGE_SIZE; 1659 debugf("zero_page_va = 0x%"PRI0ptrX"\n", zero_page_va); 1660 debugf("copy_page_src_va = 0x%"PRI0ptrX"\n", copy_page_src_va); 1661 debugf("copy_page_dst_va = 0x%"PRI0ptrX"\n", copy_page_dst_va); 1662 1663 /* Initialize page zero/copy mutexes. */ 1664 mtx_init(&zero_page_mutex, "mmu_booke_zero_page", NULL, MTX_DEF); 1665 mtx_init(©_page_mutex, "mmu_booke_copy_page", NULL, MTX_DEF); 1666 1667 /* Allocate KVA space for ptbl bufs. */ 1668 ptbl_buf_pool_vabase = virtual_avail; 1669 virtual_avail += PTBL_BUFS * PTBL_PAGES * PAGE_SIZE; 1670 debugf("ptbl_buf_pool_vabase = 0x%"PRI0ptrX" end = 0x%"PRI0ptrX"\n", 1671 ptbl_buf_pool_vabase, virtual_avail); 1672 #endif 1673 1674 /* Calculate corresponding physical addresses for the kernel region. */ 1675 phys_kernelend = kernload + kernsize; 1676 debugf("kernel image and allocated data:\n"); 1677 debugf(" kernload = 0x%09llx\n", (uint64_t)kernload); 1678 debugf(" kernstart = 0x%"PRI0ptrX"\n", kernstart); 1679 debugf(" kernsize = 0x%"PRI0ptrX"\n", kernsize); 1680 1681 /* 1682 * Remove kernel physical address range from avail regions list. Page 1683 * align all regions. Non-page aligned memory isn't very interesting 1684 * to us. Also, sort the entries for ascending addresses. 1685 */ 1686 1687 /* Retrieve phys/avail mem regions */ 1688 mem_regions(&physmem_regions, &physmem_regions_sz, 1689 &availmem_regions, &availmem_regions_sz); 1690 1691 if (PHYS_AVAIL_ENTRIES < availmem_regions_sz) 1692 panic("mmu_booke_bootstrap: phys_avail too small"); 1693 1694 sz = 0; 1695 cnt = availmem_regions_sz; 1696 debugf("processing avail regions:\n"); 1697 for (mp = availmem_regions; mp->mr_size; mp++) { 1698 s = mp->mr_start; 1699 e = mp->mr_start + mp->mr_size; 1700 debugf(" %09jx-%09jx -> ", (uintmax_t)s, (uintmax_t)e); 1701 /* Check whether this region holds all of the kernel. */ 1702 if (s < kernload && e > phys_kernelend) { 1703 availmem_regions[cnt].mr_start = phys_kernelend; 1704 availmem_regions[cnt++].mr_size = e - phys_kernelend; 1705 e = kernload; 1706 } 1707 /* Look whether this regions starts within the kernel. */ 1708 if (s >= kernload && s < phys_kernelend) { 1709 if (e <= phys_kernelend) 1710 goto empty; 1711 s = phys_kernelend; 1712 } 1713 /* Now look whether this region ends within the kernel. */ 1714 if (e > kernload && e <= phys_kernelend) { 1715 if (s >= kernload) 1716 goto empty; 1717 e = kernload; 1718 } 1719 /* Now page align the start and size of the region. */ 1720 s = round_page(s); 1721 e = trunc_page(e); 1722 if (e < s) 1723 e = s; 1724 sz = e - s; 1725 debugf("%09jx-%09jx = %jx\n", 1726 (uintmax_t)s, (uintmax_t)e, (uintmax_t)sz); 1727 1728 /* Check whether some memory is left here. */ 1729 if (sz == 0) { 1730 empty: 1731 memmove(mp, mp + 1, 1732 (cnt - (mp - availmem_regions)) * sizeof(*mp)); 1733 cnt--; 1734 mp--; 1735 continue; 1736 } 1737 1738 /* Do an insertion sort. */ 1739 for (mp1 = availmem_regions; mp1 < mp; mp1++) 1740 if (s < mp1->mr_start) 1741 break; 1742 if (mp1 < mp) { 1743 memmove(mp1 + 1, mp1, (char *)mp - (char *)mp1); 1744 mp1->mr_start = s; 1745 mp1->mr_size = sz; 1746 } else { 1747 mp->mr_start = s; 1748 mp->mr_size = sz; 1749 } 1750 } 1751 availmem_regions_sz = cnt; 1752 1753 /*******************************************************/ 1754 /* Steal physical memory for kernel stack from the end */ 1755 /* of the first avail region */ 1756 /*******************************************************/ 1757 kstack0_sz = kstack_pages * PAGE_SIZE; 1758 kstack0_phys = availmem_regions[0].mr_start + 1759 availmem_regions[0].mr_size; 1760 kstack0_phys -= kstack0_sz; 1761 availmem_regions[0].mr_size -= kstack0_sz; 1762 1763 /*******************************************************/ 1764 /* Fill in phys_avail table, based on availmem_regions */ 1765 /*******************************************************/ 1766 phys_avail_count = 0; 1767 physsz = 0; 1768 hwphyssz = 0; 1769 TUNABLE_ULONG_FETCH("hw.physmem", (u_long *) &hwphyssz); 1770 1771 debugf("fill in phys_avail:\n"); 1772 for (i = 0, j = 0; i < availmem_regions_sz; i++, j += 2) { 1773 1774 debugf(" region: 0x%jx - 0x%jx (0x%jx)\n", 1775 (uintmax_t)availmem_regions[i].mr_start, 1776 (uintmax_t)availmem_regions[i].mr_start + 1777 availmem_regions[i].mr_size, 1778 (uintmax_t)availmem_regions[i].mr_size); 1779 1780 if (hwphyssz != 0 && 1781 (physsz + availmem_regions[i].mr_size) >= hwphyssz) { 1782 debugf(" hw.physmem adjust\n"); 1783 if (physsz < hwphyssz) { 1784 phys_avail[j] = availmem_regions[i].mr_start; 1785 phys_avail[j + 1] = 1786 availmem_regions[i].mr_start + 1787 hwphyssz - physsz; 1788 physsz = hwphyssz; 1789 phys_avail_count++; 1790 dump_avail[j] = phys_avail[j]; 1791 dump_avail[j + 1] = phys_avail[j + 1]; 1792 } 1793 break; 1794 } 1795 1796 phys_avail[j] = availmem_regions[i].mr_start; 1797 phys_avail[j + 1] = availmem_regions[i].mr_start + 1798 availmem_regions[i].mr_size; 1799 phys_avail_count++; 1800 physsz += availmem_regions[i].mr_size; 1801 dump_avail[j] = phys_avail[j]; 1802 dump_avail[j + 1] = phys_avail[j + 1]; 1803 } 1804 physmem = btoc(physsz); 1805 1806 /* Calculate the last available physical address. */ 1807 for (i = 0; phys_avail[i + 2] != 0; i += 2) 1808 ; 1809 Maxmem = powerpc_btop(phys_avail[i + 1]); 1810 1811 debugf("Maxmem = 0x%08lx\n", Maxmem); 1812 debugf("phys_avail_count = %d\n", phys_avail_count); 1813 debugf("physsz = 0x%09jx physmem = %jd (0x%09jx)\n", 1814 (uintmax_t)physsz, (uintmax_t)physmem, (uintmax_t)physmem); 1815 1816 #ifdef __powerpc64__ 1817 /* 1818 * Map the physical memory contiguously in TLB1. 1819 * Round so it fits into a single mapping. 1820 */ 1821 tlb1_mapin_region(DMAP_BASE_ADDRESS, 0, 1822 phys_avail[i + 1]); 1823 #endif 1824 1825 /*******************************************************/ 1826 /* Initialize (statically allocated) kernel pmap. */ 1827 /*******************************************************/ 1828 PMAP_LOCK_INIT(kernel_pmap); 1829 #ifdef __powerpc64__ 1830 kernel_pmap->pm_pp2d = (pte_t ***)kernel_ptbl_root; 1831 #else 1832 kptbl_min = VM_MIN_KERNEL_ADDRESS / PDIR_SIZE; 1833 kernel_pmap->pm_pdir = (pte_t **)kernel_ptbl_root; 1834 #endif 1835 1836 debugf("kernel_pmap = 0x%"PRI0ptrX"\n", (uintptr_t)kernel_pmap); 1837 kernel_pte_alloc(virtual_avail, kernstart, kernel_pdir); 1838 for (i = 0; i < MAXCPU; i++) { 1839 kernel_pmap->pm_tid[i] = TID_KERNEL; 1840 1841 /* Initialize each CPU's tidbusy entry 0 with kernel_pmap */ 1842 tidbusy[i][TID_KERNEL] = kernel_pmap; 1843 } 1844 1845 /* Mark kernel_pmap active on all CPUs */ 1846 CPU_FILL(&kernel_pmap->pm_active); 1847 1848 /* 1849 * Initialize the global pv list lock. 1850 */ 1851 rw_init(&pvh_global_lock, "pmap pv global"); 1852 1853 /*******************************************************/ 1854 /* Final setup */ 1855 /*******************************************************/ 1856 1857 /* Enter kstack0 into kernel map, provide guard page */ 1858 kstack0 = virtual_avail + KSTACK_GUARD_PAGES * PAGE_SIZE; 1859 thread0.td_kstack = kstack0; 1860 thread0.td_kstack_pages = kstack_pages; 1861 1862 debugf("kstack_sz = 0x%08x\n", kstack0_sz); 1863 debugf("kstack0_phys at 0x%09llx - 0x%09llx\n", 1864 kstack0_phys, kstack0_phys + kstack0_sz); 1865 debugf("kstack0 at 0x%"PRI0ptrX" - 0x%"PRI0ptrX"\n", 1866 kstack0, kstack0 + kstack0_sz); 1867 1868 virtual_avail += KSTACK_GUARD_PAGES * PAGE_SIZE + kstack0_sz; 1869 for (i = 0; i < kstack_pages; i++) { 1870 mmu_booke_kenter(mmu, kstack0, kstack0_phys); 1871 kstack0 += PAGE_SIZE; 1872 kstack0_phys += PAGE_SIZE; 1873 } 1874 1875 pmap_bootstrapped = 1; 1876 1877 debugf("virtual_avail = %"PRI0ptrX"\n", virtual_avail); 1878 debugf("virtual_end = %"PRI0ptrX"\n", virtual_end); 1879 1880 debugf("mmu_booke_bootstrap: exit\n"); 1881 } 1882 1883 #ifdef SMP 1884 void 1885 tlb1_ap_prep(void) 1886 { 1887 tlb_entry_t *e, tmp; 1888 unsigned int i; 1889 1890 /* Prepare TLB1 image for AP processors */ 1891 e = __boot_tlb1; 1892 for (i = 0; i < TLB1_ENTRIES; i++) { 1893 tlb1_read_entry(&tmp, i); 1894 1895 if ((tmp.mas1 & MAS1_VALID) && (tmp.mas2 & _TLB_ENTRY_SHARED)) 1896 memcpy(e++, &tmp, sizeof(tmp)); 1897 } 1898 } 1899 1900 void 1901 pmap_bootstrap_ap(volatile uint32_t *trcp __unused) 1902 { 1903 int i; 1904 1905 /* 1906 * Finish TLB1 configuration: the BSP already set up its TLB1 and we 1907 * have the snapshot of its contents in the s/w __boot_tlb1[] table 1908 * created by tlb1_ap_prep(), so use these values directly to 1909 * (re)program AP's TLB1 hardware. 1910 * 1911 * Start at index 1 because index 0 has the kernel map. 1912 */ 1913 for (i = 1; i < TLB1_ENTRIES; i++) { 1914 if (__boot_tlb1[i].mas1 & MAS1_VALID) 1915 tlb1_write_entry(&__boot_tlb1[i], i); 1916 } 1917 1918 set_mas4_defaults(); 1919 } 1920 #endif 1921 1922 static void 1923 booke_pmap_init_qpages(void) 1924 { 1925 struct pcpu *pc; 1926 int i; 1927 1928 CPU_FOREACH(i) { 1929 pc = pcpu_find(i); 1930 pc->pc_qmap_addr = kva_alloc(PAGE_SIZE); 1931 if (pc->pc_qmap_addr == 0) 1932 panic("pmap_init_qpages: unable to allocate KVA"); 1933 } 1934 } 1935 1936 SYSINIT(qpages_init, SI_SUB_CPU, SI_ORDER_ANY, booke_pmap_init_qpages, NULL); 1937 1938 /* 1939 * Get the physical page address for the given pmap/virtual address. 1940 */ 1941 static vm_paddr_t 1942 mmu_booke_extract(mmu_t mmu, pmap_t pmap, vm_offset_t va) 1943 { 1944 vm_paddr_t pa; 1945 1946 PMAP_LOCK(pmap); 1947 pa = pte_vatopa(mmu, pmap, va); 1948 PMAP_UNLOCK(pmap); 1949 1950 return (pa); 1951 } 1952 1953 /* 1954 * Extract the physical page address associated with the given 1955 * kernel virtual address. 1956 */ 1957 static vm_paddr_t 1958 mmu_booke_kextract(mmu_t mmu, vm_offset_t va) 1959 { 1960 tlb_entry_t e; 1961 vm_paddr_t p = 0; 1962 int i; 1963 1964 #ifdef __powerpc64__ 1965 if (va >= DMAP_BASE_ADDRESS && va <= DMAP_MAX_ADDRESS) 1966 return (DMAP_TO_PHYS(va)); 1967 #endif 1968 1969 if (va >= VM_MIN_KERNEL_ADDRESS && va <= VM_MAX_KERNEL_ADDRESS) 1970 p = pte_vatopa(mmu, kernel_pmap, va); 1971 1972 if (p == 0) { 1973 /* Check TLB1 mappings */ 1974 for (i = 0; i < TLB1_ENTRIES; i++) { 1975 tlb1_read_entry(&e, i); 1976 if (!(e.mas1 & MAS1_VALID)) 1977 continue; 1978 if (va >= e.virt && va < e.virt + e.size) 1979 return (e.phys + (va - e.virt)); 1980 } 1981 } 1982 1983 return (p); 1984 } 1985 1986 /* 1987 * Initialize the pmap module. 1988 * Called by vm_init, to initialize any structures that the pmap 1989 * system needs to map virtual memory. 1990 */ 1991 static void 1992 mmu_booke_init(mmu_t mmu) 1993 { 1994 int shpgperproc = PMAP_SHPGPERPROC; 1995 1996 /* 1997 * Initialize the address space (zone) for the pv entries. Set a 1998 * high water mark so that the system can recover from excessive 1999 * numbers of pv entries. 2000 */ 2001 pvzone = uma_zcreate("PV ENTRY", sizeof(struct pv_entry), NULL, NULL, 2002 NULL, NULL, UMA_ALIGN_PTR, UMA_ZONE_VM | UMA_ZONE_NOFREE); 2003 2004 TUNABLE_INT_FETCH("vm.pmap.shpgperproc", &shpgperproc); 2005 pv_entry_max = shpgperproc * maxproc + vm_cnt.v_page_count; 2006 2007 TUNABLE_INT_FETCH("vm.pmap.pv_entries", &pv_entry_max); 2008 pv_entry_high_water = 9 * (pv_entry_max / 10); 2009 2010 uma_zone_reserve_kva(pvzone, pv_entry_max); 2011 2012 /* Pre-fill pvzone with initial number of pv entries. */ 2013 uma_prealloc(pvzone, PV_ENTRY_ZONE_MIN); 2014 2015 /* Create a UMA zone for page table roots. */ 2016 ptbl_root_zone = uma_zcreate("pmap root", PMAP_ROOT_SIZE, 2017 NULL, NULL, NULL, NULL, UMA_ALIGN_CACHE, UMA_ZONE_VM); 2018 2019 /* Initialize ptbl allocation. */ 2020 ptbl_init(); 2021 } 2022 2023 /* 2024 * Map a list of wired pages into kernel virtual address space. This is 2025 * intended for temporary mappings which do not need page modification or 2026 * references recorded. Existing mappings in the region are overwritten. 2027 */ 2028 static void 2029 mmu_booke_qenter(mmu_t mmu, vm_offset_t sva, vm_page_t *m, int count) 2030 { 2031 vm_offset_t va; 2032 2033 va = sva; 2034 while (count-- > 0) { 2035 mmu_booke_kenter(mmu, va, VM_PAGE_TO_PHYS(*m)); 2036 va += PAGE_SIZE; 2037 m++; 2038 } 2039 } 2040 2041 /* 2042 * Remove page mappings from kernel virtual address space. Intended for 2043 * temporary mappings entered by mmu_booke_qenter. 2044 */ 2045 static void 2046 mmu_booke_qremove(mmu_t mmu, vm_offset_t sva, int count) 2047 { 2048 vm_offset_t va; 2049 2050 va = sva; 2051 while (count-- > 0) { 2052 mmu_booke_kremove(mmu, va); 2053 va += PAGE_SIZE; 2054 } 2055 } 2056 2057 /* 2058 * Map a wired page into kernel virtual address space. 2059 */ 2060 static void 2061 mmu_booke_kenter(mmu_t mmu, vm_offset_t va, vm_paddr_t pa) 2062 { 2063 2064 mmu_booke_kenter_attr(mmu, va, pa, VM_MEMATTR_DEFAULT); 2065 } 2066 2067 static void 2068 mmu_booke_kenter_attr(mmu_t mmu, vm_offset_t va, vm_paddr_t pa, vm_memattr_t ma) 2069 { 2070 uint32_t flags; 2071 pte_t *pte; 2072 2073 KASSERT(((va >= VM_MIN_KERNEL_ADDRESS) && 2074 (va <= VM_MAX_KERNEL_ADDRESS)), ("mmu_booke_kenter: invalid va")); 2075 2076 flags = PTE_SR | PTE_SW | PTE_SX | PTE_WIRED | PTE_VALID; 2077 flags |= tlb_calc_wimg(pa, ma) << PTE_MAS2_SHIFT; 2078 flags |= PTE_PS_4KB; 2079 2080 pte = pte_find(mmu, kernel_pmap, va); 2081 KASSERT((pte != NULL), ("mmu_booke_kenter: invalid va. NULL PTE")); 2082 2083 mtx_lock_spin(&tlbivax_mutex); 2084 tlb_miss_lock(); 2085 2086 if (PTE_ISVALID(pte)) { 2087 2088 CTR1(KTR_PMAP, "%s: replacing entry!", __func__); 2089 2090 /* Flush entry from TLB0 */ 2091 tlb0_flush_entry(va); 2092 } 2093 2094 *pte = PTE_RPN_FROM_PA(pa) | flags; 2095 2096 //debugf("mmu_booke_kenter: pdir_idx = %d ptbl_idx = %d va=0x%08x " 2097 // "pa=0x%08x rpn=0x%08x flags=0x%08x\n", 2098 // pdir_idx, ptbl_idx, va, pa, pte->rpn, pte->flags); 2099 2100 /* Flush the real memory from the instruction cache. */ 2101 if ((flags & (PTE_I | PTE_G)) == 0) 2102 __syncicache((void *)va, PAGE_SIZE); 2103 2104 tlb_miss_unlock(); 2105 mtx_unlock_spin(&tlbivax_mutex); 2106 } 2107 2108 /* 2109 * Remove a page from kernel page table. 2110 */ 2111 static void 2112 mmu_booke_kremove(mmu_t mmu, vm_offset_t va) 2113 { 2114 pte_t *pte; 2115 2116 CTR2(KTR_PMAP,"%s: s (va = 0x%"PRI0ptrX")\n", __func__, va); 2117 2118 KASSERT(((va >= VM_MIN_KERNEL_ADDRESS) && 2119 (va <= VM_MAX_KERNEL_ADDRESS)), 2120 ("mmu_booke_kremove: invalid va")); 2121 2122 pte = pte_find(mmu, kernel_pmap, va); 2123 2124 if (!PTE_ISVALID(pte)) { 2125 2126 CTR1(KTR_PMAP, "%s: invalid pte", __func__); 2127 2128 return; 2129 } 2130 2131 mtx_lock_spin(&tlbivax_mutex); 2132 tlb_miss_lock(); 2133 2134 /* Invalidate entry in TLB0, update PTE. */ 2135 tlb0_flush_entry(va); 2136 *pte = 0; 2137 2138 tlb_miss_unlock(); 2139 mtx_unlock_spin(&tlbivax_mutex); 2140 } 2141 2142 /* 2143 * Provide a kernel pointer corresponding to a given userland pointer. 2144 * The returned pointer is valid until the next time this function is 2145 * called in this thread. This is used internally in copyin/copyout. 2146 */ 2147 int 2148 mmu_booke_map_user_ptr(mmu_t mmu, pmap_t pm, volatile const void *uaddr, 2149 void **kaddr, size_t ulen, size_t *klen) 2150 { 2151 2152 if (trunc_page((uintptr_t)uaddr + ulen) > VM_MAXUSER_ADDRESS) 2153 return (EFAULT); 2154 2155 *kaddr = (void *)(uintptr_t)uaddr; 2156 if (klen) 2157 *klen = ulen; 2158 2159 return (0); 2160 } 2161 2162 /* 2163 * Figure out where a given kernel pointer (usually in a fault) points 2164 * to from the VM's perspective, potentially remapping into userland's 2165 * address space. 2166 */ 2167 static int 2168 mmu_booke_decode_kernel_ptr(mmu_t mmu, vm_offset_t addr, int *is_user, 2169 vm_offset_t *decoded_addr) 2170 { 2171 2172 if (trunc_page(addr) <= VM_MAXUSER_ADDRESS) 2173 *is_user = 1; 2174 else 2175 *is_user = 0; 2176 2177 *decoded_addr = addr; 2178 return (0); 2179 } 2180 2181 /* 2182 * Initialize pmap associated with process 0. 2183 */ 2184 static void 2185 mmu_booke_pinit0(mmu_t mmu, pmap_t pmap) 2186 { 2187 2188 PMAP_LOCK_INIT(pmap); 2189 mmu_booke_pinit(mmu, pmap); 2190 PCPU_SET(curpmap, pmap); 2191 } 2192 2193 /* 2194 * Initialize a preallocated and zeroed pmap structure, 2195 * such as one in a vmspace structure. 2196 */ 2197 static void 2198 mmu_booke_pinit(mmu_t mmu, pmap_t pmap) 2199 { 2200 int i; 2201 2202 CTR4(KTR_PMAP, "%s: pmap = %p, proc %d '%s'", __func__, pmap, 2203 curthread->td_proc->p_pid, curthread->td_proc->p_comm); 2204 2205 KASSERT((pmap != kernel_pmap), ("pmap_pinit: initializing kernel_pmap")); 2206 2207 for (i = 0; i < MAXCPU; i++) 2208 pmap->pm_tid[i] = TID_NONE; 2209 CPU_ZERO(&kernel_pmap->pm_active); 2210 bzero(&pmap->pm_stats, sizeof(pmap->pm_stats)); 2211 #ifdef __powerpc64__ 2212 pmap->pm_pp2d = uma_zalloc(ptbl_root_zone, M_WAITOK); 2213 bzero(pmap->pm_pp2d, sizeof(pte_t **) * PP2D_NENTRIES); 2214 #else 2215 pmap->pm_pdir = uma_zalloc(ptbl_root_zone, M_WAITOK); 2216 bzero(pmap->pm_pdir, sizeof(pte_t *) * PDIR_NENTRIES); 2217 TAILQ_INIT(&pmap->pm_ptbl_list); 2218 #endif 2219 } 2220 2221 /* 2222 * Release any resources held by the given physical map. 2223 * Called when a pmap initialized by mmu_booke_pinit is being released. 2224 * Should only be called if the map contains no valid mappings. 2225 */ 2226 static void 2227 mmu_booke_release(mmu_t mmu, pmap_t pmap) 2228 { 2229 2230 KASSERT(pmap->pm_stats.resident_count == 0, 2231 ("pmap_release: pmap resident count %ld != 0", 2232 pmap->pm_stats.resident_count)); 2233 #ifdef __powerpc64__ 2234 uma_zfree(ptbl_root_zone, pmap->pm_pp2d); 2235 #else 2236 uma_zfree(ptbl_root_zone, pmap->pm_pdir); 2237 #endif 2238 } 2239 2240 /* 2241 * Insert the given physical page at the specified virtual address in the 2242 * target physical map with the protection requested. If specified the page 2243 * will be wired down. 2244 */ 2245 static int 2246 mmu_booke_enter(mmu_t mmu, pmap_t pmap, vm_offset_t va, vm_page_t m, 2247 vm_prot_t prot, u_int flags, int8_t psind) 2248 { 2249 int error; 2250 2251 rw_wlock(&pvh_global_lock); 2252 PMAP_LOCK(pmap); 2253 error = mmu_booke_enter_locked(mmu, pmap, va, m, prot, flags, psind); 2254 PMAP_UNLOCK(pmap); 2255 rw_wunlock(&pvh_global_lock); 2256 return (error); 2257 } 2258 2259 static int 2260 mmu_booke_enter_locked(mmu_t mmu, pmap_t pmap, vm_offset_t va, vm_page_t m, 2261 vm_prot_t prot, u_int pmap_flags, int8_t psind __unused) 2262 { 2263 pte_t *pte; 2264 vm_paddr_t pa; 2265 uint32_t flags; 2266 int error, su, sync; 2267 2268 pa = VM_PAGE_TO_PHYS(m); 2269 su = (pmap == kernel_pmap); 2270 sync = 0; 2271 2272 //debugf("mmu_booke_enter_locked: s (pmap=0x%08x su=%d tid=%d m=0x%08x va=0x%08x " 2273 // "pa=0x%08x prot=0x%08x flags=%#x)\n", 2274 // (u_int32_t)pmap, su, pmap->pm_tid, 2275 // (u_int32_t)m, va, pa, prot, flags); 2276 2277 if (su) { 2278 KASSERT(((va >= virtual_avail) && 2279 (va <= VM_MAX_KERNEL_ADDRESS)), 2280 ("mmu_booke_enter_locked: kernel pmap, non kernel va")); 2281 } else { 2282 KASSERT((va <= VM_MAXUSER_ADDRESS), 2283 ("mmu_booke_enter_locked: user pmap, non user va")); 2284 } 2285 if ((m->oflags & VPO_UNMANAGED) == 0) { 2286 if ((pmap_flags & PMAP_ENTER_QUICK_LOCKED) == 0) 2287 VM_PAGE_OBJECT_BUSY_ASSERT(m); 2288 else 2289 VM_OBJECT_ASSERT_LOCKED(m->object); 2290 } 2291 2292 PMAP_LOCK_ASSERT(pmap, MA_OWNED); 2293 2294 /* 2295 * If there is an existing mapping, and the physical address has not 2296 * changed, must be protection or wiring change. 2297 */ 2298 if (((pte = pte_find(mmu, pmap, va)) != NULL) && 2299 (PTE_ISVALID(pte)) && (PTE_PA(pte) == pa)) { 2300 2301 /* 2302 * Before actually updating pte->flags we calculate and 2303 * prepare its new value in a helper var. 2304 */ 2305 flags = *pte; 2306 flags &= ~(PTE_UW | PTE_UX | PTE_SW | PTE_SX | PTE_MODIFIED); 2307 2308 /* Wiring change, just update stats. */ 2309 if ((pmap_flags & PMAP_ENTER_WIRED) != 0) { 2310 if (!PTE_ISWIRED(pte)) { 2311 flags |= PTE_WIRED; 2312 pmap->pm_stats.wired_count++; 2313 } 2314 } else { 2315 if (PTE_ISWIRED(pte)) { 2316 flags &= ~PTE_WIRED; 2317 pmap->pm_stats.wired_count--; 2318 } 2319 } 2320 2321 if (prot & VM_PROT_WRITE) { 2322 /* Add write permissions. */ 2323 flags |= PTE_SW; 2324 if (!su) 2325 flags |= PTE_UW; 2326 2327 if ((flags & PTE_MANAGED) != 0) 2328 vm_page_aflag_set(m, PGA_WRITEABLE); 2329 } else { 2330 /* Handle modified pages, sense modify status. */ 2331 2332 /* 2333 * The PTE_MODIFIED flag could be set by underlying 2334 * TLB misses since we last read it (above), possibly 2335 * other CPUs could update it so we check in the PTE 2336 * directly rather than rely on that saved local flags 2337 * copy. 2338 */ 2339 if (PTE_ISMODIFIED(pte)) 2340 vm_page_dirty(m); 2341 } 2342 2343 if (prot & VM_PROT_EXECUTE) { 2344 flags |= PTE_SX; 2345 if (!su) 2346 flags |= PTE_UX; 2347 2348 /* 2349 * Check existing flags for execute permissions: if we 2350 * are turning execute permissions on, icache should 2351 * be flushed. 2352 */ 2353 if ((*pte & (PTE_UX | PTE_SX)) == 0) 2354 sync++; 2355 } 2356 2357 flags &= ~PTE_REFERENCED; 2358 2359 /* 2360 * The new flags value is all calculated -- only now actually 2361 * update the PTE. 2362 */ 2363 mtx_lock_spin(&tlbivax_mutex); 2364 tlb_miss_lock(); 2365 2366 tlb0_flush_entry(va); 2367 *pte &= ~PTE_FLAGS_MASK; 2368 *pte |= flags; 2369 2370 tlb_miss_unlock(); 2371 mtx_unlock_spin(&tlbivax_mutex); 2372 2373 } else { 2374 /* 2375 * If there is an existing mapping, but it's for a different 2376 * physical address, pte_enter() will delete the old mapping. 2377 */ 2378 //if ((pte != NULL) && PTE_ISVALID(pte)) 2379 // debugf("mmu_booke_enter_locked: replace\n"); 2380 //else 2381 // debugf("mmu_booke_enter_locked: new\n"); 2382 2383 /* Now set up the flags and install the new mapping. */ 2384 flags = (PTE_SR | PTE_VALID); 2385 flags |= PTE_M; 2386 2387 if (!su) 2388 flags |= PTE_UR; 2389 2390 if (prot & VM_PROT_WRITE) { 2391 flags |= PTE_SW; 2392 if (!su) 2393 flags |= PTE_UW; 2394 2395 if ((m->oflags & VPO_UNMANAGED) == 0) 2396 vm_page_aflag_set(m, PGA_WRITEABLE); 2397 } 2398 2399 if (prot & VM_PROT_EXECUTE) { 2400 flags |= PTE_SX; 2401 if (!su) 2402 flags |= PTE_UX; 2403 } 2404 2405 /* If its wired update stats. */ 2406 if ((pmap_flags & PMAP_ENTER_WIRED) != 0) 2407 flags |= PTE_WIRED; 2408 2409 error = pte_enter(mmu, pmap, m, va, flags, 2410 (pmap_flags & PMAP_ENTER_NOSLEEP) != 0); 2411 if (error != 0) 2412 return (KERN_RESOURCE_SHORTAGE); 2413 2414 if ((flags & PMAP_ENTER_WIRED) != 0) 2415 pmap->pm_stats.wired_count++; 2416 2417 /* Flush the real memory from the instruction cache. */ 2418 if (prot & VM_PROT_EXECUTE) 2419 sync++; 2420 } 2421 2422 if (sync && (su || pmap == PCPU_GET(curpmap))) { 2423 __syncicache((void *)va, PAGE_SIZE); 2424 sync = 0; 2425 } 2426 2427 return (KERN_SUCCESS); 2428 } 2429 2430 /* 2431 * Maps a sequence of resident pages belonging to the same object. 2432 * The sequence begins with the given page m_start. This page is 2433 * mapped at the given virtual address start. Each subsequent page is 2434 * mapped at a virtual address that is offset from start by the same 2435 * amount as the page is offset from m_start within the object. The 2436 * last page in the sequence is the page with the largest offset from 2437 * m_start that can be mapped at a virtual address less than the given 2438 * virtual address end. Not every virtual page between start and end 2439 * is mapped; only those for which a resident page exists with the 2440 * corresponding offset from m_start are mapped. 2441 */ 2442 static void 2443 mmu_booke_enter_object(mmu_t mmu, pmap_t pmap, vm_offset_t start, 2444 vm_offset_t end, vm_page_t m_start, vm_prot_t prot) 2445 { 2446 vm_page_t m; 2447 vm_pindex_t diff, psize; 2448 2449 VM_OBJECT_ASSERT_LOCKED(m_start->object); 2450 2451 psize = atop(end - start); 2452 m = m_start; 2453 rw_wlock(&pvh_global_lock); 2454 PMAP_LOCK(pmap); 2455 while (m != NULL && (diff = m->pindex - m_start->pindex) < psize) { 2456 mmu_booke_enter_locked(mmu, pmap, start + ptoa(diff), m, 2457 prot & (VM_PROT_READ | VM_PROT_EXECUTE), 2458 PMAP_ENTER_NOSLEEP | PMAP_ENTER_QUICK_LOCKED, 0); 2459 m = TAILQ_NEXT(m, listq); 2460 } 2461 rw_wunlock(&pvh_global_lock); 2462 PMAP_UNLOCK(pmap); 2463 } 2464 2465 static void 2466 mmu_booke_enter_quick(mmu_t mmu, pmap_t pmap, vm_offset_t va, vm_page_t m, 2467 vm_prot_t prot) 2468 { 2469 2470 rw_wlock(&pvh_global_lock); 2471 PMAP_LOCK(pmap); 2472 mmu_booke_enter_locked(mmu, pmap, va, m, 2473 prot & (VM_PROT_READ | VM_PROT_EXECUTE), PMAP_ENTER_NOSLEEP | 2474 PMAP_ENTER_QUICK_LOCKED, 0); 2475 rw_wunlock(&pvh_global_lock); 2476 PMAP_UNLOCK(pmap); 2477 } 2478 2479 /* 2480 * Remove the given range of addresses from the specified map. 2481 * 2482 * It is assumed that the start and end are properly rounded to the page size. 2483 */ 2484 static void 2485 mmu_booke_remove(mmu_t mmu, pmap_t pmap, vm_offset_t va, vm_offset_t endva) 2486 { 2487 pte_t *pte; 2488 uint8_t hold_flag; 2489 2490 int su = (pmap == kernel_pmap); 2491 2492 //debugf("mmu_booke_remove: s (su = %d pmap=0x%08x tid=%d va=0x%08x endva=0x%08x)\n", 2493 // su, (u_int32_t)pmap, pmap->pm_tid, va, endva); 2494 2495 if (su) { 2496 KASSERT(((va >= virtual_avail) && 2497 (va <= VM_MAX_KERNEL_ADDRESS)), 2498 ("mmu_booke_remove: kernel pmap, non kernel va")); 2499 } else { 2500 KASSERT((va <= VM_MAXUSER_ADDRESS), 2501 ("mmu_booke_remove: user pmap, non user va")); 2502 } 2503 2504 if (PMAP_REMOVE_DONE(pmap)) { 2505 //debugf("mmu_booke_remove: e (empty)\n"); 2506 return; 2507 } 2508 2509 hold_flag = PTBL_HOLD_FLAG(pmap); 2510 //debugf("mmu_booke_remove: hold_flag = %d\n", hold_flag); 2511 2512 rw_wlock(&pvh_global_lock); 2513 PMAP_LOCK(pmap); 2514 for (; va < endva; va += PAGE_SIZE) { 2515 pte = pte_find(mmu, pmap, va); 2516 if ((pte != NULL) && PTE_ISVALID(pte)) 2517 pte_remove(mmu, pmap, va, hold_flag); 2518 } 2519 PMAP_UNLOCK(pmap); 2520 rw_wunlock(&pvh_global_lock); 2521 2522 //debugf("mmu_booke_remove: e\n"); 2523 } 2524 2525 /* 2526 * Remove physical page from all pmaps in which it resides. 2527 */ 2528 static void 2529 mmu_booke_remove_all(mmu_t mmu, vm_page_t m) 2530 { 2531 pv_entry_t pv, pvn; 2532 uint8_t hold_flag; 2533 2534 rw_wlock(&pvh_global_lock); 2535 for (pv = TAILQ_FIRST(&m->md.pv_list); pv != NULL; pv = pvn) { 2536 pvn = TAILQ_NEXT(pv, pv_link); 2537 2538 PMAP_LOCK(pv->pv_pmap); 2539 hold_flag = PTBL_HOLD_FLAG(pv->pv_pmap); 2540 pte_remove(mmu, pv->pv_pmap, pv->pv_va, hold_flag); 2541 PMAP_UNLOCK(pv->pv_pmap); 2542 } 2543 vm_page_aflag_clear(m, PGA_WRITEABLE); 2544 rw_wunlock(&pvh_global_lock); 2545 } 2546 2547 /* 2548 * Map a range of physical addresses into kernel virtual address space. 2549 */ 2550 static vm_offset_t 2551 mmu_booke_map(mmu_t mmu, vm_offset_t *virt, vm_paddr_t pa_start, 2552 vm_paddr_t pa_end, int prot) 2553 { 2554 vm_offset_t sva = *virt; 2555 vm_offset_t va = sva; 2556 2557 #ifdef __powerpc64__ 2558 /* XXX: Handle memory not starting at 0x0. */ 2559 if (pa_end < ctob(Maxmem)) 2560 return (PHYS_TO_DMAP(pa_start)); 2561 #endif 2562 2563 while (pa_start < pa_end) { 2564 mmu_booke_kenter(mmu, va, pa_start); 2565 va += PAGE_SIZE; 2566 pa_start += PAGE_SIZE; 2567 } 2568 *virt = va; 2569 2570 return (sva); 2571 } 2572 2573 /* 2574 * The pmap must be activated before it's address space can be accessed in any 2575 * way. 2576 */ 2577 static void 2578 mmu_booke_activate(mmu_t mmu, struct thread *td) 2579 { 2580 pmap_t pmap; 2581 u_int cpuid; 2582 2583 pmap = &td->td_proc->p_vmspace->vm_pmap; 2584 2585 CTR5(KTR_PMAP, "%s: s (td = %p, proc = '%s', id = %d, pmap = 0x%"PRI0ptrX")", 2586 __func__, td, td->td_proc->p_comm, td->td_proc->p_pid, pmap); 2587 2588 KASSERT((pmap != kernel_pmap), ("mmu_booke_activate: kernel_pmap!")); 2589 2590 sched_pin(); 2591 2592 cpuid = PCPU_GET(cpuid); 2593 CPU_SET_ATOMIC(cpuid, &pmap->pm_active); 2594 PCPU_SET(curpmap, pmap); 2595 2596 if (pmap->pm_tid[cpuid] == TID_NONE) 2597 tid_alloc(pmap); 2598 2599 /* Load PID0 register with pmap tid value. */ 2600 mtspr(SPR_PID0, pmap->pm_tid[cpuid]); 2601 __asm __volatile("isync"); 2602 2603 mtspr(SPR_DBCR0, td->td_pcb->pcb_cpu.booke.dbcr0); 2604 2605 sched_unpin(); 2606 2607 CTR3(KTR_PMAP, "%s: e (tid = %d for '%s')", __func__, 2608 pmap->pm_tid[PCPU_GET(cpuid)], td->td_proc->p_comm); 2609 } 2610 2611 /* 2612 * Deactivate the specified process's address space. 2613 */ 2614 static void 2615 mmu_booke_deactivate(mmu_t mmu, struct thread *td) 2616 { 2617 pmap_t pmap; 2618 2619 pmap = &td->td_proc->p_vmspace->vm_pmap; 2620 2621 CTR5(KTR_PMAP, "%s: td=%p, proc = '%s', id = %d, pmap = 0x%"PRI0ptrX, 2622 __func__, td, td->td_proc->p_comm, td->td_proc->p_pid, pmap); 2623 2624 td->td_pcb->pcb_cpu.booke.dbcr0 = mfspr(SPR_DBCR0); 2625 2626 CPU_CLR_ATOMIC(PCPU_GET(cpuid), &pmap->pm_active); 2627 PCPU_SET(curpmap, NULL); 2628 } 2629 2630 /* 2631 * Copy the range specified by src_addr/len 2632 * from the source map to the range dst_addr/len 2633 * in the destination map. 2634 * 2635 * This routine is only advisory and need not do anything. 2636 */ 2637 static void 2638 mmu_booke_copy(mmu_t mmu, pmap_t dst_pmap, pmap_t src_pmap, 2639 vm_offset_t dst_addr, vm_size_t len, vm_offset_t src_addr) 2640 { 2641 2642 } 2643 2644 /* 2645 * Set the physical protection on the specified range of this map as requested. 2646 */ 2647 static void 2648 mmu_booke_protect(mmu_t mmu, pmap_t pmap, vm_offset_t sva, vm_offset_t eva, 2649 vm_prot_t prot) 2650 { 2651 vm_offset_t va; 2652 vm_page_t m; 2653 pte_t *pte; 2654 2655 if ((prot & VM_PROT_READ) == VM_PROT_NONE) { 2656 mmu_booke_remove(mmu, pmap, sva, eva); 2657 return; 2658 } 2659 2660 if (prot & VM_PROT_WRITE) 2661 return; 2662 2663 PMAP_LOCK(pmap); 2664 for (va = sva; va < eva; va += PAGE_SIZE) { 2665 if ((pte = pte_find(mmu, pmap, va)) != NULL) { 2666 if (PTE_ISVALID(pte)) { 2667 m = PHYS_TO_VM_PAGE(PTE_PA(pte)); 2668 2669 mtx_lock_spin(&tlbivax_mutex); 2670 tlb_miss_lock(); 2671 2672 /* Handle modified pages. */ 2673 if (PTE_ISMODIFIED(pte) && PTE_ISMANAGED(pte)) 2674 vm_page_dirty(m); 2675 2676 tlb0_flush_entry(va); 2677 *pte &= ~(PTE_UW | PTE_SW | PTE_MODIFIED); 2678 2679 tlb_miss_unlock(); 2680 mtx_unlock_spin(&tlbivax_mutex); 2681 } 2682 } 2683 } 2684 PMAP_UNLOCK(pmap); 2685 } 2686 2687 /* 2688 * Clear the write and modified bits in each of the given page's mappings. 2689 */ 2690 static void 2691 mmu_booke_remove_write(mmu_t mmu, vm_page_t m) 2692 { 2693 pv_entry_t pv; 2694 pte_t *pte; 2695 2696 KASSERT((m->oflags & VPO_UNMANAGED) == 0, 2697 ("mmu_booke_remove_write: page %p is not managed", m)); 2698 vm_page_assert_busied(m); 2699 2700 if (!pmap_page_is_write_mapped(m)) 2701 return; 2702 rw_wlock(&pvh_global_lock); 2703 TAILQ_FOREACH(pv, &m->md.pv_list, pv_link) { 2704 PMAP_LOCK(pv->pv_pmap); 2705 if ((pte = pte_find(mmu, pv->pv_pmap, pv->pv_va)) != NULL) { 2706 if (PTE_ISVALID(pte)) { 2707 m = PHYS_TO_VM_PAGE(PTE_PA(pte)); 2708 2709 mtx_lock_spin(&tlbivax_mutex); 2710 tlb_miss_lock(); 2711 2712 /* Handle modified pages. */ 2713 if (PTE_ISMODIFIED(pte)) 2714 vm_page_dirty(m); 2715 2716 /* Flush mapping from TLB0. */ 2717 *pte &= ~(PTE_UW | PTE_SW | PTE_MODIFIED); 2718 2719 tlb_miss_unlock(); 2720 mtx_unlock_spin(&tlbivax_mutex); 2721 } 2722 } 2723 PMAP_UNLOCK(pv->pv_pmap); 2724 } 2725 vm_page_aflag_clear(m, PGA_WRITEABLE); 2726 rw_wunlock(&pvh_global_lock); 2727 } 2728 2729 static void 2730 mmu_booke_sync_icache(mmu_t mmu, pmap_t pm, vm_offset_t va, vm_size_t sz) 2731 { 2732 pte_t *pte; 2733 vm_paddr_t pa = 0; 2734 int sync_sz, valid; 2735 #ifndef __powerpc64__ 2736 pmap_t pmap; 2737 vm_page_t m; 2738 vm_offset_t addr; 2739 int active; 2740 #endif 2741 2742 #ifndef __powerpc64__ 2743 rw_wlock(&pvh_global_lock); 2744 pmap = PCPU_GET(curpmap); 2745 active = (pm == kernel_pmap || pm == pmap) ? 1 : 0; 2746 #endif 2747 while (sz > 0) { 2748 PMAP_LOCK(pm); 2749 pte = pte_find(mmu, pm, va); 2750 valid = (pte != NULL && PTE_ISVALID(pte)) ? 1 : 0; 2751 if (valid) 2752 pa = PTE_PA(pte); 2753 PMAP_UNLOCK(pm); 2754 sync_sz = PAGE_SIZE - (va & PAGE_MASK); 2755 sync_sz = min(sync_sz, sz); 2756 if (valid) { 2757 #ifdef __powerpc64__ 2758 pa += (va & PAGE_MASK); 2759 __syncicache((void *)PHYS_TO_DMAP(pa), sync_sz); 2760 #else 2761 if (!active) { 2762 /* Create a mapping in the active pmap. */ 2763 addr = 0; 2764 m = PHYS_TO_VM_PAGE(pa); 2765 PMAP_LOCK(pmap); 2766 pte_enter(mmu, pmap, m, addr, 2767 PTE_SR | PTE_VALID, FALSE); 2768 addr += (va & PAGE_MASK); 2769 __syncicache((void *)addr, sync_sz); 2770 pte_remove(mmu, pmap, addr, PTBL_UNHOLD); 2771 PMAP_UNLOCK(pmap); 2772 } else 2773 __syncicache((void *)va, sync_sz); 2774 #endif 2775 } 2776 va += sync_sz; 2777 sz -= sync_sz; 2778 } 2779 #ifndef __powerpc64__ 2780 rw_wunlock(&pvh_global_lock); 2781 #endif 2782 } 2783 2784 /* 2785 * Atomically extract and hold the physical page with the given 2786 * pmap and virtual address pair if that mapping permits the given 2787 * protection. 2788 */ 2789 static vm_page_t 2790 mmu_booke_extract_and_hold(mmu_t mmu, pmap_t pmap, vm_offset_t va, 2791 vm_prot_t prot) 2792 { 2793 pte_t *pte; 2794 vm_page_t m; 2795 uint32_t pte_wbit; 2796 2797 m = NULL; 2798 PMAP_LOCK(pmap); 2799 pte = pte_find(mmu, pmap, va); 2800 if ((pte != NULL) && PTE_ISVALID(pte)) { 2801 if (pmap == kernel_pmap) 2802 pte_wbit = PTE_SW; 2803 else 2804 pte_wbit = PTE_UW; 2805 2806 if ((*pte & pte_wbit) != 0 || (prot & VM_PROT_WRITE) == 0) { 2807 m = PHYS_TO_VM_PAGE(PTE_PA(pte)); 2808 if (!vm_page_wire_mapped(m)) 2809 m = NULL; 2810 } 2811 } 2812 PMAP_UNLOCK(pmap); 2813 return (m); 2814 } 2815 2816 /* 2817 * Initialize a vm_page's machine-dependent fields. 2818 */ 2819 static void 2820 mmu_booke_page_init(mmu_t mmu, vm_page_t m) 2821 { 2822 2823 m->md.pv_tracked = 0; 2824 TAILQ_INIT(&m->md.pv_list); 2825 } 2826 2827 /* 2828 * mmu_booke_zero_page_area zeros the specified hardware page by 2829 * mapping it into virtual memory and using bzero to clear 2830 * its contents. 2831 * 2832 * off and size must reside within a single page. 2833 */ 2834 static void 2835 mmu_booke_zero_page_area(mmu_t mmu, vm_page_t m, int off, int size) 2836 { 2837 vm_offset_t va; 2838 2839 /* XXX KASSERT off and size are within a single page? */ 2840 2841 #ifdef __powerpc64__ 2842 va = PHYS_TO_DMAP(VM_PAGE_TO_PHYS(m)); 2843 bzero((caddr_t)va + off, size); 2844 #else 2845 mtx_lock(&zero_page_mutex); 2846 va = zero_page_va; 2847 2848 mmu_booke_kenter(mmu, va, VM_PAGE_TO_PHYS(m)); 2849 bzero((caddr_t)va + off, size); 2850 mmu_booke_kremove(mmu, va); 2851 2852 mtx_unlock(&zero_page_mutex); 2853 #endif 2854 } 2855 2856 /* 2857 * mmu_booke_zero_page zeros the specified hardware page. 2858 */ 2859 static void 2860 mmu_booke_zero_page(mmu_t mmu, vm_page_t m) 2861 { 2862 vm_offset_t off, va; 2863 2864 #ifdef __powerpc64__ 2865 va = PHYS_TO_DMAP(VM_PAGE_TO_PHYS(m)); 2866 2867 for (off = 0; off < PAGE_SIZE; off += cacheline_size) 2868 __asm __volatile("dcbz 0,%0" :: "r"(va + off)); 2869 #else 2870 va = zero_page_va; 2871 mtx_lock(&zero_page_mutex); 2872 2873 mmu_booke_kenter(mmu, va, VM_PAGE_TO_PHYS(m)); 2874 2875 for (off = 0; off < PAGE_SIZE; off += cacheline_size) 2876 __asm __volatile("dcbz 0,%0" :: "r"(va + off)); 2877 2878 mmu_booke_kremove(mmu, va); 2879 2880 mtx_unlock(&zero_page_mutex); 2881 #endif 2882 } 2883 2884 /* 2885 * mmu_booke_copy_page copies the specified (machine independent) page by 2886 * mapping the page into virtual memory and using memcopy to copy the page, 2887 * one machine dependent page at a time. 2888 */ 2889 static void 2890 mmu_booke_copy_page(mmu_t mmu, vm_page_t sm, vm_page_t dm) 2891 { 2892 vm_offset_t sva, dva; 2893 2894 #ifdef __powerpc64__ 2895 sva = PHYS_TO_DMAP(VM_PAGE_TO_PHYS(sm)); 2896 dva = PHYS_TO_DMAP(VM_PAGE_TO_PHYS(dm)); 2897 memcpy((caddr_t)dva, (caddr_t)sva, PAGE_SIZE); 2898 #else 2899 sva = copy_page_src_va; 2900 dva = copy_page_dst_va; 2901 2902 mtx_lock(©_page_mutex); 2903 mmu_booke_kenter(mmu, sva, VM_PAGE_TO_PHYS(sm)); 2904 mmu_booke_kenter(mmu, dva, VM_PAGE_TO_PHYS(dm)); 2905 2906 memcpy((caddr_t)dva, (caddr_t)sva, PAGE_SIZE); 2907 2908 mmu_booke_kremove(mmu, dva); 2909 mmu_booke_kremove(mmu, sva); 2910 mtx_unlock(©_page_mutex); 2911 #endif 2912 } 2913 2914 static inline void 2915 mmu_booke_copy_pages(mmu_t mmu, vm_page_t *ma, vm_offset_t a_offset, 2916 vm_page_t *mb, vm_offset_t b_offset, int xfersize) 2917 { 2918 void *a_cp, *b_cp; 2919 vm_offset_t a_pg_offset, b_pg_offset; 2920 int cnt; 2921 2922 #ifdef __powerpc64__ 2923 vm_page_t pa, pb; 2924 2925 while (xfersize > 0) { 2926 a_pg_offset = a_offset & PAGE_MASK; 2927 pa = ma[a_offset >> PAGE_SHIFT]; 2928 b_pg_offset = b_offset & PAGE_MASK; 2929 pb = mb[b_offset >> PAGE_SHIFT]; 2930 cnt = min(xfersize, PAGE_SIZE - a_pg_offset); 2931 cnt = min(cnt, PAGE_SIZE - b_pg_offset); 2932 a_cp = (caddr_t)((uintptr_t)PHYS_TO_DMAP(VM_PAGE_TO_PHYS(pa)) + 2933 a_pg_offset); 2934 b_cp = (caddr_t)((uintptr_t)PHYS_TO_DMAP(VM_PAGE_TO_PHYS(pb)) + 2935 b_pg_offset); 2936 bcopy(a_cp, b_cp, cnt); 2937 a_offset += cnt; 2938 b_offset += cnt; 2939 xfersize -= cnt; 2940 } 2941 #else 2942 mtx_lock(©_page_mutex); 2943 while (xfersize > 0) { 2944 a_pg_offset = a_offset & PAGE_MASK; 2945 cnt = min(xfersize, PAGE_SIZE - a_pg_offset); 2946 mmu_booke_kenter(mmu, copy_page_src_va, 2947 VM_PAGE_TO_PHYS(ma[a_offset >> PAGE_SHIFT])); 2948 a_cp = (char *)copy_page_src_va + a_pg_offset; 2949 b_pg_offset = b_offset & PAGE_MASK; 2950 cnt = min(cnt, PAGE_SIZE - b_pg_offset); 2951 mmu_booke_kenter(mmu, copy_page_dst_va, 2952 VM_PAGE_TO_PHYS(mb[b_offset >> PAGE_SHIFT])); 2953 b_cp = (char *)copy_page_dst_va + b_pg_offset; 2954 bcopy(a_cp, b_cp, cnt); 2955 mmu_booke_kremove(mmu, copy_page_dst_va); 2956 mmu_booke_kremove(mmu, copy_page_src_va); 2957 a_offset += cnt; 2958 b_offset += cnt; 2959 xfersize -= cnt; 2960 } 2961 mtx_unlock(©_page_mutex); 2962 #endif 2963 } 2964 2965 static vm_offset_t 2966 mmu_booke_quick_enter_page(mmu_t mmu, vm_page_t m) 2967 { 2968 #ifdef __powerpc64__ 2969 return (PHYS_TO_DMAP(VM_PAGE_TO_PHYS(m))); 2970 #else 2971 vm_paddr_t paddr; 2972 vm_offset_t qaddr; 2973 uint32_t flags; 2974 pte_t *pte; 2975 2976 paddr = VM_PAGE_TO_PHYS(m); 2977 2978 flags = PTE_SR | PTE_SW | PTE_SX | PTE_WIRED | PTE_VALID; 2979 flags |= tlb_calc_wimg(paddr, pmap_page_get_memattr(m)) << PTE_MAS2_SHIFT; 2980 flags |= PTE_PS_4KB; 2981 2982 critical_enter(); 2983 qaddr = PCPU_GET(qmap_addr); 2984 2985 pte = pte_find(mmu, kernel_pmap, qaddr); 2986 2987 KASSERT(*pte == 0, ("mmu_booke_quick_enter_page: PTE busy")); 2988 2989 /* 2990 * XXX: tlbivax is broadcast to other cores, but qaddr should 2991 * not be present in other TLBs. Is there a better instruction 2992 * sequence to use? Or just forget it & use mmu_booke_kenter()... 2993 */ 2994 __asm __volatile("tlbivax 0, %0" :: "r"(qaddr & MAS2_EPN_MASK)); 2995 __asm __volatile("isync; msync"); 2996 2997 *pte = PTE_RPN_FROM_PA(paddr) | flags; 2998 2999 /* Flush the real memory from the instruction cache. */ 3000 if ((flags & (PTE_I | PTE_G)) == 0) 3001 __syncicache((void *)qaddr, PAGE_SIZE); 3002 3003 return (qaddr); 3004 #endif 3005 } 3006 3007 static void 3008 mmu_booke_quick_remove_page(mmu_t mmu, vm_offset_t addr) 3009 { 3010 #ifndef __powerpc64__ 3011 pte_t *pte; 3012 3013 pte = pte_find(mmu, kernel_pmap, addr); 3014 3015 KASSERT(PCPU_GET(qmap_addr) == addr, 3016 ("mmu_booke_quick_remove_page: invalid address")); 3017 KASSERT(*pte != 0, 3018 ("mmu_booke_quick_remove_page: PTE not in use")); 3019 3020 *pte = 0; 3021 critical_exit(); 3022 #endif 3023 } 3024 3025 /* 3026 * Return whether or not the specified physical page was modified 3027 * in any of physical maps. 3028 */ 3029 static boolean_t 3030 mmu_booke_is_modified(mmu_t mmu, vm_page_t m) 3031 { 3032 pte_t *pte; 3033 pv_entry_t pv; 3034 boolean_t rv; 3035 3036 KASSERT((m->oflags & VPO_UNMANAGED) == 0, 3037 ("mmu_booke_is_modified: page %p is not managed", m)); 3038 rv = FALSE; 3039 3040 /* 3041 * If the page is not busied then this check is racy. 3042 */ 3043 if (!pmap_page_is_write_mapped(m)) 3044 return (FALSE); 3045 3046 rw_wlock(&pvh_global_lock); 3047 TAILQ_FOREACH(pv, &m->md.pv_list, pv_link) { 3048 PMAP_LOCK(pv->pv_pmap); 3049 if ((pte = pte_find(mmu, pv->pv_pmap, pv->pv_va)) != NULL && 3050 PTE_ISVALID(pte)) { 3051 if (PTE_ISMODIFIED(pte)) 3052 rv = TRUE; 3053 } 3054 PMAP_UNLOCK(pv->pv_pmap); 3055 if (rv) 3056 break; 3057 } 3058 rw_wunlock(&pvh_global_lock); 3059 return (rv); 3060 } 3061 3062 /* 3063 * Return whether or not the specified virtual address is eligible 3064 * for prefault. 3065 */ 3066 static boolean_t 3067 mmu_booke_is_prefaultable(mmu_t mmu, pmap_t pmap, vm_offset_t addr) 3068 { 3069 3070 return (FALSE); 3071 } 3072 3073 /* 3074 * Return whether or not the specified physical page was referenced 3075 * in any physical maps. 3076 */ 3077 static boolean_t 3078 mmu_booke_is_referenced(mmu_t mmu, vm_page_t m) 3079 { 3080 pte_t *pte; 3081 pv_entry_t pv; 3082 boolean_t rv; 3083 3084 KASSERT((m->oflags & VPO_UNMANAGED) == 0, 3085 ("mmu_booke_is_referenced: page %p is not managed", m)); 3086 rv = FALSE; 3087 rw_wlock(&pvh_global_lock); 3088 TAILQ_FOREACH(pv, &m->md.pv_list, pv_link) { 3089 PMAP_LOCK(pv->pv_pmap); 3090 if ((pte = pte_find(mmu, pv->pv_pmap, pv->pv_va)) != NULL && 3091 PTE_ISVALID(pte)) { 3092 if (PTE_ISREFERENCED(pte)) 3093 rv = TRUE; 3094 } 3095 PMAP_UNLOCK(pv->pv_pmap); 3096 if (rv) 3097 break; 3098 } 3099 rw_wunlock(&pvh_global_lock); 3100 return (rv); 3101 } 3102 3103 /* 3104 * Clear the modify bits on the specified physical page. 3105 */ 3106 static void 3107 mmu_booke_clear_modify(mmu_t mmu, vm_page_t m) 3108 { 3109 pte_t *pte; 3110 pv_entry_t pv; 3111 3112 KASSERT((m->oflags & VPO_UNMANAGED) == 0, 3113 ("mmu_booke_clear_modify: page %p is not managed", m)); 3114 vm_page_assert_busied(m); 3115 3116 if (!pmap_page_is_write_mapped(m)) 3117 return; 3118 3119 rw_wlock(&pvh_global_lock); 3120 TAILQ_FOREACH(pv, &m->md.pv_list, pv_link) { 3121 PMAP_LOCK(pv->pv_pmap); 3122 if ((pte = pte_find(mmu, pv->pv_pmap, pv->pv_va)) != NULL && 3123 PTE_ISVALID(pte)) { 3124 mtx_lock_spin(&tlbivax_mutex); 3125 tlb_miss_lock(); 3126 3127 if (*pte & (PTE_SW | PTE_UW | PTE_MODIFIED)) { 3128 tlb0_flush_entry(pv->pv_va); 3129 *pte &= ~(PTE_SW | PTE_UW | PTE_MODIFIED | 3130 PTE_REFERENCED); 3131 } 3132 3133 tlb_miss_unlock(); 3134 mtx_unlock_spin(&tlbivax_mutex); 3135 } 3136 PMAP_UNLOCK(pv->pv_pmap); 3137 } 3138 rw_wunlock(&pvh_global_lock); 3139 } 3140 3141 /* 3142 * Return a count of reference bits for a page, clearing those bits. 3143 * It is not necessary for every reference bit to be cleared, but it 3144 * is necessary that 0 only be returned when there are truly no 3145 * reference bits set. 3146 * 3147 * As an optimization, update the page's dirty field if a modified bit is 3148 * found while counting reference bits. This opportunistic update can be 3149 * performed at low cost and can eliminate the need for some future calls 3150 * to pmap_is_modified(). However, since this function stops after 3151 * finding PMAP_TS_REFERENCED_MAX reference bits, it may not detect some 3152 * dirty pages. Those dirty pages will only be detected by a future call 3153 * to pmap_is_modified(). 3154 */ 3155 static int 3156 mmu_booke_ts_referenced(mmu_t mmu, vm_page_t m) 3157 { 3158 pte_t *pte; 3159 pv_entry_t pv; 3160 int count; 3161 3162 KASSERT((m->oflags & VPO_UNMANAGED) == 0, 3163 ("mmu_booke_ts_referenced: page %p is not managed", m)); 3164 count = 0; 3165 rw_wlock(&pvh_global_lock); 3166 TAILQ_FOREACH(pv, &m->md.pv_list, pv_link) { 3167 PMAP_LOCK(pv->pv_pmap); 3168 if ((pte = pte_find(mmu, pv->pv_pmap, pv->pv_va)) != NULL && 3169 PTE_ISVALID(pte)) { 3170 if (PTE_ISMODIFIED(pte)) 3171 vm_page_dirty(m); 3172 if (PTE_ISREFERENCED(pte)) { 3173 mtx_lock_spin(&tlbivax_mutex); 3174 tlb_miss_lock(); 3175 3176 tlb0_flush_entry(pv->pv_va); 3177 *pte &= ~PTE_REFERENCED; 3178 3179 tlb_miss_unlock(); 3180 mtx_unlock_spin(&tlbivax_mutex); 3181 3182 if (++count >= PMAP_TS_REFERENCED_MAX) { 3183 PMAP_UNLOCK(pv->pv_pmap); 3184 break; 3185 } 3186 } 3187 } 3188 PMAP_UNLOCK(pv->pv_pmap); 3189 } 3190 rw_wunlock(&pvh_global_lock); 3191 return (count); 3192 } 3193 3194 /* 3195 * Clear the wired attribute from the mappings for the specified range of 3196 * addresses in the given pmap. Every valid mapping within that range must 3197 * have the wired attribute set. In contrast, invalid mappings cannot have 3198 * the wired attribute set, so they are ignored. 3199 * 3200 * The wired attribute of the page table entry is not a hardware feature, so 3201 * there is no need to invalidate any TLB entries. 3202 */ 3203 static void 3204 mmu_booke_unwire(mmu_t mmu, pmap_t pmap, vm_offset_t sva, vm_offset_t eva) 3205 { 3206 vm_offset_t va; 3207 pte_t *pte; 3208 3209 PMAP_LOCK(pmap); 3210 for (va = sva; va < eva; va += PAGE_SIZE) { 3211 if ((pte = pte_find(mmu, pmap, va)) != NULL && 3212 PTE_ISVALID(pte)) { 3213 if (!PTE_ISWIRED(pte)) 3214 panic("mmu_booke_unwire: pte %p isn't wired", 3215 pte); 3216 *pte &= ~PTE_WIRED; 3217 pmap->pm_stats.wired_count--; 3218 } 3219 } 3220 PMAP_UNLOCK(pmap); 3221 3222 } 3223 3224 /* 3225 * Return true if the pmap's pv is one of the first 16 pvs linked to from this 3226 * page. This count may be changed upwards or downwards in the future; it is 3227 * only necessary that true be returned for a small subset of pmaps for proper 3228 * page aging. 3229 */ 3230 static boolean_t 3231 mmu_booke_page_exists_quick(mmu_t mmu, pmap_t pmap, vm_page_t m) 3232 { 3233 pv_entry_t pv; 3234 int loops; 3235 boolean_t rv; 3236 3237 KASSERT((m->oflags & VPO_UNMANAGED) == 0, 3238 ("mmu_booke_page_exists_quick: page %p is not managed", m)); 3239 loops = 0; 3240 rv = FALSE; 3241 rw_wlock(&pvh_global_lock); 3242 TAILQ_FOREACH(pv, &m->md.pv_list, pv_link) { 3243 if (pv->pv_pmap == pmap) { 3244 rv = TRUE; 3245 break; 3246 } 3247 if (++loops >= 16) 3248 break; 3249 } 3250 rw_wunlock(&pvh_global_lock); 3251 return (rv); 3252 } 3253 3254 /* 3255 * Return the number of managed mappings to the given physical page that are 3256 * wired. 3257 */ 3258 static int 3259 mmu_booke_page_wired_mappings(mmu_t mmu, vm_page_t m) 3260 { 3261 pv_entry_t pv; 3262 pte_t *pte; 3263 int count = 0; 3264 3265 if ((m->oflags & VPO_UNMANAGED) != 0) 3266 return (count); 3267 rw_wlock(&pvh_global_lock); 3268 TAILQ_FOREACH(pv, &m->md.pv_list, pv_link) { 3269 PMAP_LOCK(pv->pv_pmap); 3270 if ((pte = pte_find(mmu, pv->pv_pmap, pv->pv_va)) != NULL) 3271 if (PTE_ISVALID(pte) && PTE_ISWIRED(pte)) 3272 count++; 3273 PMAP_UNLOCK(pv->pv_pmap); 3274 } 3275 rw_wunlock(&pvh_global_lock); 3276 return (count); 3277 } 3278 3279 static int 3280 mmu_booke_dev_direct_mapped(mmu_t mmu, vm_paddr_t pa, vm_size_t size) 3281 { 3282 int i; 3283 vm_offset_t va; 3284 3285 /* 3286 * This currently does not work for entries that 3287 * overlap TLB1 entries. 3288 */ 3289 for (i = 0; i < TLB1_ENTRIES; i ++) { 3290 if (tlb1_iomapped(i, pa, size, &va) == 0) 3291 return (0); 3292 } 3293 3294 return (EFAULT); 3295 } 3296 3297 void 3298 mmu_booke_dumpsys_map(mmu_t mmu, vm_paddr_t pa, size_t sz, void **va) 3299 { 3300 vm_paddr_t ppa; 3301 vm_offset_t ofs; 3302 vm_size_t gran; 3303 3304 /* Minidumps are based on virtual memory addresses. */ 3305 if (do_minidump) { 3306 *va = (void *)(vm_offset_t)pa; 3307 return; 3308 } 3309 3310 /* Raw physical memory dumps don't have a virtual address. */ 3311 /* We always map a 256MB page at 256M. */ 3312 gran = 256 * 1024 * 1024; 3313 ppa = rounddown2(pa, gran); 3314 ofs = pa - ppa; 3315 *va = (void *)gran; 3316 tlb1_set_entry((vm_offset_t)va, ppa, gran, _TLB_ENTRY_IO); 3317 3318 if (sz > (gran - ofs)) 3319 tlb1_set_entry((vm_offset_t)(va + gran), ppa + gran, gran, 3320 _TLB_ENTRY_IO); 3321 } 3322 3323 void 3324 mmu_booke_dumpsys_unmap(mmu_t mmu, vm_paddr_t pa, size_t sz, void *va) 3325 { 3326 vm_paddr_t ppa; 3327 vm_offset_t ofs; 3328 vm_size_t gran; 3329 tlb_entry_t e; 3330 int i; 3331 3332 /* Minidumps are based on virtual memory addresses. */ 3333 /* Nothing to do... */ 3334 if (do_minidump) 3335 return; 3336 3337 for (i = 0; i < TLB1_ENTRIES; i++) { 3338 tlb1_read_entry(&e, i); 3339 if (!(e.mas1 & MAS1_VALID)) 3340 break; 3341 } 3342 3343 /* Raw physical memory dumps don't have a virtual address. */ 3344 i--; 3345 e.mas1 = 0; 3346 e.mas2 = 0; 3347 e.mas3 = 0; 3348 tlb1_write_entry(&e, i); 3349 3350 gran = 256 * 1024 * 1024; 3351 ppa = rounddown2(pa, gran); 3352 ofs = pa - ppa; 3353 if (sz > (gran - ofs)) { 3354 i--; 3355 e.mas1 = 0; 3356 e.mas2 = 0; 3357 e.mas3 = 0; 3358 tlb1_write_entry(&e, i); 3359 } 3360 } 3361 3362 extern struct dump_pa dump_map[PHYS_AVAIL_SZ + 1]; 3363 3364 void 3365 mmu_booke_scan_init(mmu_t mmu) 3366 { 3367 vm_offset_t va; 3368 pte_t *pte; 3369 int i; 3370 3371 if (!do_minidump) { 3372 /* Initialize phys. segments for dumpsys(). */ 3373 memset(&dump_map, 0, sizeof(dump_map)); 3374 mem_regions(&physmem_regions, &physmem_regions_sz, &availmem_regions, 3375 &availmem_regions_sz); 3376 for (i = 0; i < physmem_regions_sz; i++) { 3377 dump_map[i].pa_start = physmem_regions[i].mr_start; 3378 dump_map[i].pa_size = physmem_regions[i].mr_size; 3379 } 3380 return; 3381 } 3382 3383 /* Virtual segments for minidumps: */ 3384 memset(&dump_map, 0, sizeof(dump_map)); 3385 3386 /* 1st: kernel .data and .bss. */ 3387 dump_map[0].pa_start = trunc_page((uintptr_t)_etext); 3388 dump_map[0].pa_size = 3389 round_page((uintptr_t)_end) - dump_map[0].pa_start; 3390 3391 /* 2nd: msgbuf and tables (see pmap_bootstrap()). */ 3392 dump_map[1].pa_start = data_start; 3393 dump_map[1].pa_size = data_end - data_start; 3394 3395 /* 3rd: kernel VM. */ 3396 va = dump_map[1].pa_start + dump_map[1].pa_size; 3397 /* Find start of next chunk (from va). */ 3398 while (va < virtual_end) { 3399 /* Don't dump the buffer cache. */ 3400 if (va >= kmi.buffer_sva && va < kmi.buffer_eva) { 3401 va = kmi.buffer_eva; 3402 continue; 3403 } 3404 pte = pte_find(mmu, kernel_pmap, va); 3405 if (pte != NULL && PTE_ISVALID(pte)) 3406 break; 3407 va += PAGE_SIZE; 3408 } 3409 if (va < virtual_end) { 3410 dump_map[2].pa_start = va; 3411 va += PAGE_SIZE; 3412 /* Find last page in chunk. */ 3413 while (va < virtual_end) { 3414 /* Don't run into the buffer cache. */ 3415 if (va == kmi.buffer_sva) 3416 break; 3417 pte = pte_find(mmu, kernel_pmap, va); 3418 if (pte == NULL || !PTE_ISVALID(pte)) 3419 break; 3420 va += PAGE_SIZE; 3421 } 3422 dump_map[2].pa_size = va - dump_map[2].pa_start; 3423 } 3424 } 3425 3426 /* 3427 * Map a set of physical memory pages into the kernel virtual address space. 3428 * Return a pointer to where it is mapped. This routine is intended to be used 3429 * for mapping device memory, NOT real memory. 3430 */ 3431 static void * 3432 mmu_booke_mapdev(mmu_t mmu, vm_paddr_t pa, vm_size_t size) 3433 { 3434 3435 return (mmu_booke_mapdev_attr(mmu, pa, size, VM_MEMATTR_DEFAULT)); 3436 } 3437 3438 static void * 3439 mmu_booke_mapdev_attr(mmu_t mmu, vm_paddr_t pa, vm_size_t size, vm_memattr_t ma) 3440 { 3441 tlb_entry_t e; 3442 void *res; 3443 uintptr_t va, tmpva; 3444 vm_size_t sz; 3445 int i; 3446 3447 /* 3448 * Check if this is premapped in TLB1. Note: this should probably also 3449 * check whether a sequence of TLB1 entries exist that match the 3450 * requirement, but now only checks the easy case. 3451 */ 3452 for (i = 0; i < TLB1_ENTRIES; i++) { 3453 tlb1_read_entry(&e, i); 3454 if (!(e.mas1 & MAS1_VALID)) 3455 continue; 3456 if (pa >= e.phys && 3457 (pa + size) <= (e.phys + e.size) && 3458 (ma == VM_MEMATTR_DEFAULT || 3459 tlb_calc_wimg(pa, ma) == 3460 (e.mas2 & (MAS2_WIMGE_MASK & ~_TLB_ENTRY_SHARED)))) 3461 return (void *)(e.virt + 3462 (vm_offset_t)(pa - e.phys)); 3463 } 3464 3465 size = roundup(size, PAGE_SIZE); 3466 3467 /* 3468 * The device mapping area is between VM_MAXUSER_ADDRESS and 3469 * VM_MIN_KERNEL_ADDRESS. This gives 1GB of device addressing. 3470 */ 3471 #ifdef SPARSE_MAPDEV 3472 /* 3473 * With a sparse mapdev, align to the largest starting region. This 3474 * could feasibly be optimized for a 'best-fit' alignment, but that 3475 * calculation could be very costly. 3476 * Align to the smaller of: 3477 * - first set bit in overlap of (pa & size mask) 3478 * - largest size envelope 3479 * 3480 * It's possible the device mapping may start at a PA that's not larger 3481 * than the size mask, so we need to offset in to maximize the TLB entry 3482 * range and minimize the number of used TLB entries. 3483 */ 3484 do { 3485 tmpva = tlb1_map_base; 3486 sz = ffsl(((1 << flsl(size-1)) - 1) & pa); 3487 sz = sz ? min(roundup(sz + 3, 4), flsl(size) - 1) : flsl(size) - 1; 3488 va = roundup(tlb1_map_base, 1 << sz) | (((1 << sz) - 1) & pa); 3489 #ifdef __powerpc64__ 3490 } while (!atomic_cmpset_long(&tlb1_map_base, tmpva, va + size)); 3491 #else 3492 } while (!atomic_cmpset_int(&tlb1_map_base, tmpva, va + size)); 3493 #endif 3494 #else 3495 #ifdef __powerpc64__ 3496 va = atomic_fetchadd_long(&tlb1_map_base, size); 3497 #else 3498 va = atomic_fetchadd_int(&tlb1_map_base, size); 3499 #endif 3500 #endif 3501 res = (void *)va; 3502 3503 do { 3504 sz = 1 << (ilog2(size) & ~1); 3505 /* Align size to PA */ 3506 if (pa % sz != 0) { 3507 do { 3508 sz >>= 2; 3509 } while (pa % sz != 0); 3510 } 3511 /* Now align from there to VA */ 3512 if (va % sz != 0) { 3513 do { 3514 sz >>= 2; 3515 } while (va % sz != 0); 3516 } 3517 if (bootverbose) 3518 printf("Wiring VA=%p to PA=%jx (size=%lx)\n", 3519 (void *)va, (uintmax_t)pa, (long)sz); 3520 if (tlb1_set_entry(va, pa, sz, 3521 _TLB_ENTRY_SHARED | tlb_calc_wimg(pa, ma)) < 0) 3522 return (NULL); 3523 size -= sz; 3524 pa += sz; 3525 va += sz; 3526 } while (size > 0); 3527 3528 return (res); 3529 } 3530 3531 /* 3532 * 'Unmap' a range mapped by mmu_booke_mapdev(). 3533 */ 3534 static void 3535 mmu_booke_unmapdev(mmu_t mmu, vm_offset_t va, vm_size_t size) 3536 { 3537 #ifdef SUPPORTS_SHRINKING_TLB1 3538 vm_offset_t base, offset; 3539 3540 /* 3541 * Unmap only if this is inside kernel virtual space. 3542 */ 3543 if ((va >= VM_MIN_KERNEL_ADDRESS) && (va <= VM_MAX_KERNEL_ADDRESS)) { 3544 base = trunc_page(va); 3545 offset = va & PAGE_MASK; 3546 size = roundup(offset + size, PAGE_SIZE); 3547 kva_free(base, size); 3548 } 3549 #endif 3550 } 3551 3552 /* 3553 * mmu_booke_object_init_pt preloads the ptes for a given object into the 3554 * specified pmap. This eliminates the blast of soft faults on process startup 3555 * and immediately after an mmap. 3556 */ 3557 static void 3558 mmu_booke_object_init_pt(mmu_t mmu, pmap_t pmap, vm_offset_t addr, 3559 vm_object_t object, vm_pindex_t pindex, vm_size_t size) 3560 { 3561 3562 VM_OBJECT_ASSERT_WLOCKED(object); 3563 KASSERT(object->type == OBJT_DEVICE || object->type == OBJT_SG, 3564 ("mmu_booke_object_init_pt: non-device object")); 3565 } 3566 3567 /* 3568 * Perform the pmap work for mincore. 3569 */ 3570 static int 3571 mmu_booke_mincore(mmu_t mmu, pmap_t pmap, vm_offset_t addr, 3572 vm_paddr_t *pap) 3573 { 3574 3575 /* XXX: this should be implemented at some point */ 3576 return (0); 3577 } 3578 3579 static int 3580 mmu_booke_change_attr(mmu_t mmu, vm_offset_t addr, vm_size_t sz, 3581 vm_memattr_t mode) 3582 { 3583 vm_offset_t va; 3584 pte_t *pte; 3585 int i, j; 3586 tlb_entry_t e; 3587 3588 /* Check TLB1 mappings */ 3589 for (i = 0; i < TLB1_ENTRIES; i++) { 3590 tlb1_read_entry(&e, i); 3591 if (!(e.mas1 & MAS1_VALID)) 3592 continue; 3593 if (addr >= e.virt && addr < e.virt + e.size) 3594 break; 3595 } 3596 if (i < TLB1_ENTRIES) { 3597 /* Only allow full mappings to be modified for now. */ 3598 /* Validate the range. */ 3599 for (j = i, va = addr; va < addr + sz; va += e.size, j++) { 3600 tlb1_read_entry(&e, j); 3601 if (va != e.virt || (sz - (va - addr) < e.size)) 3602 return (EINVAL); 3603 } 3604 for (va = addr; va < addr + sz; va += e.size, i++) { 3605 tlb1_read_entry(&e, i); 3606 e.mas2 &= ~MAS2_WIMGE_MASK; 3607 e.mas2 |= tlb_calc_wimg(e.phys, mode); 3608 3609 /* 3610 * Write it out to the TLB. Should really re-sync with other 3611 * cores. 3612 */ 3613 tlb1_write_entry(&e, i); 3614 } 3615 return (0); 3616 } 3617 3618 /* Not in TLB1, try through pmap */ 3619 /* First validate the range. */ 3620 for (va = addr; va < addr + sz; va += PAGE_SIZE) { 3621 pte = pte_find(mmu, kernel_pmap, va); 3622 if (pte == NULL || !PTE_ISVALID(pte)) 3623 return (EINVAL); 3624 } 3625 3626 mtx_lock_spin(&tlbivax_mutex); 3627 tlb_miss_lock(); 3628 for (va = addr; va < addr + sz; va += PAGE_SIZE) { 3629 pte = pte_find(mmu, kernel_pmap, va); 3630 *pte &= ~(PTE_MAS2_MASK << PTE_MAS2_SHIFT); 3631 *pte |= tlb_calc_wimg(PTE_PA(pte), mode) << PTE_MAS2_SHIFT; 3632 tlb0_flush_entry(va); 3633 } 3634 tlb_miss_unlock(); 3635 mtx_unlock_spin(&tlbivax_mutex); 3636 3637 return (0); 3638 } 3639 3640 /**************************************************************************/ 3641 /* TID handling */ 3642 /**************************************************************************/ 3643 3644 /* 3645 * Allocate a TID. If necessary, steal one from someone else. 3646 * The new TID is flushed from the TLB before returning. 3647 */ 3648 static tlbtid_t 3649 tid_alloc(pmap_t pmap) 3650 { 3651 tlbtid_t tid; 3652 int thiscpu; 3653 3654 KASSERT((pmap != kernel_pmap), ("tid_alloc: kernel pmap")); 3655 3656 CTR2(KTR_PMAP, "%s: s (pmap = %p)", __func__, pmap); 3657 3658 thiscpu = PCPU_GET(cpuid); 3659 3660 tid = PCPU_GET(booke.tid_next); 3661 if (tid > TID_MAX) 3662 tid = TID_MIN; 3663 PCPU_SET(booke.tid_next, tid + 1); 3664 3665 /* If we are stealing TID then clear the relevant pmap's field */ 3666 if (tidbusy[thiscpu][tid] != NULL) { 3667 3668 CTR2(KTR_PMAP, "%s: warning: stealing tid %d", __func__, tid); 3669 3670 tidbusy[thiscpu][tid]->pm_tid[thiscpu] = TID_NONE; 3671 3672 /* Flush all entries from TLB0 matching this TID. */ 3673 tid_flush(tid); 3674 } 3675 3676 tidbusy[thiscpu][tid] = pmap; 3677 pmap->pm_tid[thiscpu] = tid; 3678 __asm __volatile("msync; isync"); 3679 3680 CTR3(KTR_PMAP, "%s: e (%02d next = %02d)", __func__, tid, 3681 PCPU_GET(booke.tid_next)); 3682 3683 return (tid); 3684 } 3685 3686 /**************************************************************************/ 3687 /* TLB0 handling */ 3688 /**************************************************************************/ 3689 3690 /* Convert TLB0 va and way number to tlb0[] table index. */ 3691 static inline unsigned int 3692 tlb0_tableidx(vm_offset_t va, unsigned int way) 3693 { 3694 unsigned int idx; 3695 3696 idx = (way * TLB0_ENTRIES_PER_WAY); 3697 idx += (va & MAS2_TLB0_ENTRY_IDX_MASK) >> MAS2_TLB0_ENTRY_IDX_SHIFT; 3698 return (idx); 3699 } 3700 3701 /* 3702 * Invalidate TLB0 entry. 3703 */ 3704 static inline void 3705 tlb0_flush_entry(vm_offset_t va) 3706 { 3707 3708 CTR2(KTR_PMAP, "%s: s va=0x%08x", __func__, va); 3709 3710 mtx_assert(&tlbivax_mutex, MA_OWNED); 3711 3712 __asm __volatile("tlbivax 0, %0" :: "r"(va & MAS2_EPN_MASK)); 3713 __asm __volatile("isync; msync"); 3714 __asm __volatile("tlbsync; msync"); 3715 3716 CTR1(KTR_PMAP, "%s: e", __func__); 3717 } 3718 3719 3720 /**************************************************************************/ 3721 /* TLB1 handling */ 3722 /**************************************************************************/ 3723 3724 /* 3725 * TLB1 mapping notes: 3726 * 3727 * TLB1[0] Kernel text and data. 3728 * TLB1[1-15] Additional kernel text and data mappings (if required), PCI 3729 * windows, other devices mappings. 3730 */ 3731 3732 /* 3733 * Read an entry from given TLB1 slot. 3734 */ 3735 void 3736 tlb1_read_entry(tlb_entry_t *entry, unsigned int slot) 3737 { 3738 register_t msr; 3739 uint32_t mas0; 3740 3741 KASSERT((entry != NULL), ("%s(): Entry is NULL!", __func__)); 3742 3743 msr = mfmsr(); 3744 __asm __volatile("wrteei 0"); 3745 3746 mas0 = MAS0_TLBSEL(1) | MAS0_ESEL(slot); 3747 mtspr(SPR_MAS0, mas0); 3748 __asm __volatile("isync; tlbre"); 3749 3750 entry->mas1 = mfspr(SPR_MAS1); 3751 entry->mas2 = mfspr(SPR_MAS2); 3752 entry->mas3 = mfspr(SPR_MAS3); 3753 3754 switch ((mfpvr() >> 16) & 0xFFFF) { 3755 case FSL_E500v2: 3756 case FSL_E500mc: 3757 case FSL_E5500: 3758 case FSL_E6500: 3759 entry->mas7 = mfspr(SPR_MAS7); 3760 break; 3761 default: 3762 entry->mas7 = 0; 3763 break; 3764 } 3765 __asm __volatile("wrtee %0" :: "r"(msr)); 3766 3767 entry->virt = entry->mas2 & MAS2_EPN_MASK; 3768 entry->phys = ((vm_paddr_t)(entry->mas7 & MAS7_RPN) << 32) | 3769 (entry->mas3 & MAS3_RPN); 3770 entry->size = 3771 tsize2size((entry->mas1 & MAS1_TSIZE_MASK) >> MAS1_TSIZE_SHIFT); 3772 } 3773 3774 struct tlbwrite_args { 3775 tlb_entry_t *e; 3776 unsigned int idx; 3777 }; 3778 3779 static void 3780 tlb1_write_entry_int(void *arg) 3781 { 3782 struct tlbwrite_args *args = arg; 3783 uint32_t mas0; 3784 3785 /* Select entry */ 3786 mas0 = MAS0_TLBSEL(1) | MAS0_ESEL(args->idx); 3787 3788 mtspr(SPR_MAS0, mas0); 3789 mtspr(SPR_MAS1, args->e->mas1); 3790 mtspr(SPR_MAS2, args->e->mas2); 3791 mtspr(SPR_MAS3, args->e->mas3); 3792 switch ((mfpvr() >> 16) & 0xFFFF) { 3793 case FSL_E500mc: 3794 case FSL_E5500: 3795 case FSL_E6500: 3796 mtspr(SPR_MAS8, 0); 3797 /* FALLTHROUGH */ 3798 case FSL_E500v2: 3799 mtspr(SPR_MAS7, args->e->mas7); 3800 break; 3801 default: 3802 break; 3803 } 3804 3805 __asm __volatile("isync; tlbwe; isync; msync"); 3806 3807 } 3808 3809 static void 3810 tlb1_write_entry_sync(void *arg) 3811 { 3812 /* Empty synchronization point for smp_rendezvous(). */ 3813 } 3814 3815 /* 3816 * Write given entry to TLB1 hardware. 3817 */ 3818 static void 3819 tlb1_write_entry(tlb_entry_t *e, unsigned int idx) 3820 { 3821 struct tlbwrite_args args; 3822 3823 args.e = e; 3824 args.idx = idx; 3825 3826 #ifdef SMP 3827 if ((e->mas2 & _TLB_ENTRY_SHARED) && smp_started) { 3828 mb(); 3829 smp_rendezvous(tlb1_write_entry_sync, 3830 tlb1_write_entry_int, 3831 tlb1_write_entry_sync, &args); 3832 } else 3833 #endif 3834 { 3835 register_t msr; 3836 3837 msr = mfmsr(); 3838 __asm __volatile("wrteei 0"); 3839 tlb1_write_entry_int(&args); 3840 __asm __volatile("wrtee %0" :: "r"(msr)); 3841 } 3842 } 3843 3844 /* 3845 * Return the largest uint value log such that 2^log <= num. 3846 */ 3847 static unsigned int 3848 ilog2(unsigned long num) 3849 { 3850 long lz; 3851 3852 #ifdef __powerpc64__ 3853 __asm ("cntlzd %0, %1" : "=r" (lz) : "r" (num)); 3854 return (63 - lz); 3855 #else 3856 __asm ("cntlzw %0, %1" : "=r" (lz) : "r" (num)); 3857 return (31 - lz); 3858 #endif 3859 } 3860 3861 /* 3862 * Convert TLB TSIZE value to mapped region size. 3863 */ 3864 static vm_size_t 3865 tsize2size(unsigned int tsize) 3866 { 3867 3868 /* 3869 * size = 4^tsize KB 3870 * size = 4^tsize * 2^10 = 2^(2 * tsize - 10) 3871 */ 3872 3873 return ((1 << (2 * tsize)) * 1024); 3874 } 3875 3876 /* 3877 * Convert region size (must be power of 4) to TLB TSIZE value. 3878 */ 3879 static unsigned int 3880 size2tsize(vm_size_t size) 3881 { 3882 3883 return (ilog2(size) / 2 - 5); 3884 } 3885 3886 /* 3887 * Register permanent kernel mapping in TLB1. 3888 * 3889 * Entries are created starting from index 0 (current free entry is 3890 * kept in tlb1_idx) and are not supposed to be invalidated. 3891 */ 3892 int 3893 tlb1_set_entry(vm_offset_t va, vm_paddr_t pa, vm_size_t size, 3894 uint32_t flags) 3895 { 3896 tlb_entry_t e; 3897 uint32_t ts, tid; 3898 int tsize, index; 3899 3900 for (index = 0; index < TLB1_ENTRIES; index++) { 3901 tlb1_read_entry(&e, index); 3902 if ((e.mas1 & MAS1_VALID) == 0) 3903 break; 3904 /* Check if we're just updating the flags, and update them. */ 3905 if (e.phys == pa && e.virt == va && e.size == size) { 3906 e.mas2 = (va & MAS2_EPN_MASK) | flags; 3907 tlb1_write_entry(&e, index); 3908 return (0); 3909 } 3910 } 3911 if (index >= TLB1_ENTRIES) { 3912 printf("tlb1_set_entry: TLB1 full!\n"); 3913 return (-1); 3914 } 3915 3916 /* Convert size to TSIZE */ 3917 tsize = size2tsize(size); 3918 3919 tid = (TID_KERNEL << MAS1_TID_SHIFT) & MAS1_TID_MASK; 3920 /* XXX TS is hard coded to 0 for now as we only use single address space */ 3921 ts = (0 << MAS1_TS_SHIFT) & MAS1_TS_MASK; 3922 3923 e.phys = pa; 3924 e.virt = va; 3925 e.size = size; 3926 e.mas1 = MAS1_VALID | MAS1_IPROT | ts | tid; 3927 e.mas1 |= ((tsize << MAS1_TSIZE_SHIFT) & MAS1_TSIZE_MASK); 3928 e.mas2 = (va & MAS2_EPN_MASK) | flags; 3929 3930 /* Set supervisor RWX permission bits */ 3931 e.mas3 = (pa & MAS3_RPN) | MAS3_SR | MAS3_SW | MAS3_SX; 3932 e.mas7 = (pa >> 32) & MAS7_RPN; 3933 3934 tlb1_write_entry(&e, index); 3935 3936 /* 3937 * XXX in general TLB1 updates should be propagated between CPUs, 3938 * since current design assumes to have the same TLB1 set-up on all 3939 * cores. 3940 */ 3941 return (0); 3942 } 3943 3944 /* 3945 * Map in contiguous RAM region into the TLB1 using maximum of 3946 * KERNEL_REGION_MAX_TLB_ENTRIES entries. 3947 * 3948 * If necessary round up last entry size and return total size 3949 * used by all allocated entries. 3950 */ 3951 vm_size_t 3952 tlb1_mapin_region(vm_offset_t va, vm_paddr_t pa, vm_size_t size) 3953 { 3954 vm_size_t pgs[KERNEL_REGION_MAX_TLB_ENTRIES]; 3955 vm_size_t mapped, pgsz, base, mask; 3956 int idx, nents; 3957 3958 /* Round up to the next 1M */ 3959 size = roundup2(size, 1 << 20); 3960 3961 mapped = 0; 3962 idx = 0; 3963 base = va; 3964 pgsz = 64*1024*1024; 3965 while (mapped < size) { 3966 while (mapped < size && idx < KERNEL_REGION_MAX_TLB_ENTRIES) { 3967 while (pgsz > (size - mapped)) 3968 pgsz >>= 2; 3969 pgs[idx++] = pgsz; 3970 mapped += pgsz; 3971 } 3972 3973 /* We under-map. Correct for this. */ 3974 if (mapped < size) { 3975 while (pgs[idx - 1] == pgsz) { 3976 idx--; 3977 mapped -= pgsz; 3978 } 3979 /* XXX We may increase beyond out starting point. */ 3980 pgsz <<= 2; 3981 pgs[idx++] = pgsz; 3982 mapped += pgsz; 3983 } 3984 } 3985 3986 nents = idx; 3987 mask = pgs[0] - 1; 3988 /* Align address to the boundary */ 3989 if (va & mask) { 3990 va = (va + mask) & ~mask; 3991 pa = (pa + mask) & ~mask; 3992 } 3993 3994 for (idx = 0; idx < nents; idx++) { 3995 pgsz = pgs[idx]; 3996 debugf("%u: %llx -> %jx, size=%jx\n", idx, pa, 3997 (uintmax_t)va, (uintmax_t)pgsz); 3998 tlb1_set_entry(va, pa, pgsz, 3999 _TLB_ENTRY_SHARED | _TLB_ENTRY_MEM); 4000 pa += pgsz; 4001 va += pgsz; 4002 } 4003 4004 mapped = (va - base); 4005 if (bootverbose) 4006 printf("mapped size 0x%"PRIxPTR" (wasted space 0x%"PRIxPTR")\n", 4007 mapped, mapped - size); 4008 return (mapped); 4009 } 4010 4011 /* 4012 * TLB1 initialization routine, to be called after the very first 4013 * assembler level setup done in locore.S. 4014 */ 4015 void 4016 tlb1_init() 4017 { 4018 vm_offset_t mas2; 4019 uint32_t mas0, mas1, mas3, mas7; 4020 uint32_t tsz; 4021 4022 tlb1_get_tlbconf(); 4023 4024 mas0 = MAS0_TLBSEL(1) | MAS0_ESEL(0); 4025 mtspr(SPR_MAS0, mas0); 4026 __asm __volatile("isync; tlbre"); 4027 4028 mas1 = mfspr(SPR_MAS1); 4029 mas2 = mfspr(SPR_MAS2); 4030 mas3 = mfspr(SPR_MAS3); 4031 mas7 = mfspr(SPR_MAS7); 4032 4033 kernload = ((vm_paddr_t)(mas7 & MAS7_RPN) << 32) | 4034 (mas3 & MAS3_RPN); 4035 4036 tsz = (mas1 & MAS1_TSIZE_MASK) >> MAS1_TSIZE_SHIFT; 4037 kernsize += (tsz > 0) ? tsize2size(tsz) : 0; 4038 kernstart = trunc_page(mas2); 4039 4040 /* Setup TLB miss defaults */ 4041 set_mas4_defaults(); 4042 } 4043 4044 /* 4045 * pmap_early_io_unmap() should be used in short conjunction with 4046 * pmap_early_io_map(), as in the following snippet: 4047 * 4048 * x = pmap_early_io_map(...); 4049 * <do something with x> 4050 * pmap_early_io_unmap(x, size); 4051 * 4052 * And avoiding more allocations between. 4053 */ 4054 void 4055 pmap_early_io_unmap(vm_offset_t va, vm_size_t size) 4056 { 4057 int i; 4058 tlb_entry_t e; 4059 vm_size_t isize; 4060 4061 size = roundup(size, PAGE_SIZE); 4062 isize = size; 4063 for (i = 0; i < TLB1_ENTRIES && size > 0; i++) { 4064 tlb1_read_entry(&e, i); 4065 if (!(e.mas1 & MAS1_VALID)) 4066 continue; 4067 if (va <= e.virt && (va + isize) >= (e.virt + e.size)) { 4068 size -= e.size; 4069 e.mas1 &= ~MAS1_VALID; 4070 tlb1_write_entry(&e, i); 4071 } 4072 } 4073 if (tlb1_map_base == va + isize) 4074 tlb1_map_base -= isize; 4075 } 4076 4077 vm_offset_t 4078 pmap_early_io_map(vm_paddr_t pa, vm_size_t size) 4079 { 4080 vm_paddr_t pa_base; 4081 vm_offset_t va, sz; 4082 int i; 4083 tlb_entry_t e; 4084 4085 KASSERT(!pmap_bootstrapped, ("Do not use after PMAP is up!")); 4086 4087 for (i = 0; i < TLB1_ENTRIES; i++) { 4088 tlb1_read_entry(&e, i); 4089 if (!(e.mas1 & MAS1_VALID)) 4090 continue; 4091 if (pa >= e.phys && (pa + size) <= 4092 (e.phys + e.size)) 4093 return (e.virt + (pa - e.phys)); 4094 } 4095 4096 pa_base = rounddown(pa, PAGE_SIZE); 4097 size = roundup(size + (pa - pa_base), PAGE_SIZE); 4098 tlb1_map_base = roundup2(tlb1_map_base, 1 << (ilog2(size) & ~1)); 4099 va = tlb1_map_base + (pa - pa_base); 4100 4101 do { 4102 sz = 1 << (ilog2(size) & ~1); 4103 tlb1_set_entry(tlb1_map_base, pa_base, sz, 4104 _TLB_ENTRY_SHARED | _TLB_ENTRY_IO); 4105 size -= sz; 4106 pa_base += sz; 4107 tlb1_map_base += sz; 4108 } while (size > 0); 4109 4110 return (va); 4111 } 4112 4113 void 4114 pmap_track_page(pmap_t pmap, vm_offset_t va) 4115 { 4116 vm_paddr_t pa; 4117 vm_page_t page; 4118 struct pv_entry *pve; 4119 4120 va = trunc_page(va); 4121 pa = pmap_kextract(va); 4122 page = PHYS_TO_VM_PAGE(pa); 4123 4124 rw_wlock(&pvh_global_lock); 4125 PMAP_LOCK(pmap); 4126 4127 TAILQ_FOREACH(pve, &page->md.pv_list, pv_link) { 4128 if ((pmap == pve->pv_pmap) && (va == pve->pv_va)) { 4129 goto out; 4130 } 4131 } 4132 page->md.pv_tracked = true; 4133 pv_insert(pmap, va, page); 4134 out: 4135 PMAP_UNLOCK(pmap); 4136 rw_wunlock(&pvh_global_lock); 4137 } 4138 4139 4140 /* 4141 * Setup MAS4 defaults. 4142 * These values are loaded to MAS0-2 on a TLB miss. 4143 */ 4144 static void 4145 set_mas4_defaults(void) 4146 { 4147 uint32_t mas4; 4148 4149 /* Defaults: TLB0, PID0, TSIZED=4K */ 4150 mas4 = MAS4_TLBSELD0; 4151 mas4 |= (TLB_SIZE_4K << MAS4_TSIZED_SHIFT) & MAS4_TSIZED_MASK; 4152 #ifdef SMP 4153 mas4 |= MAS4_MD; 4154 #endif 4155 mtspr(SPR_MAS4, mas4); 4156 __asm __volatile("isync"); 4157 } 4158 4159 4160 /* 4161 * Return 0 if the physical IO range is encompassed by one of the 4162 * the TLB1 entries, otherwise return related error code. 4163 */ 4164 static int 4165 tlb1_iomapped(int i, vm_paddr_t pa, vm_size_t size, vm_offset_t *va) 4166 { 4167 uint32_t prot; 4168 vm_paddr_t pa_start; 4169 vm_paddr_t pa_end; 4170 unsigned int entry_tsize; 4171 vm_size_t entry_size; 4172 tlb_entry_t e; 4173 4174 *va = (vm_offset_t)NULL; 4175 4176 tlb1_read_entry(&e, i); 4177 /* Skip invalid entries */ 4178 if (!(e.mas1 & MAS1_VALID)) 4179 return (EINVAL); 4180 4181 /* 4182 * The entry must be cache-inhibited, guarded, and r/w 4183 * so it can function as an i/o page 4184 */ 4185 prot = e.mas2 & (MAS2_I | MAS2_G); 4186 if (prot != (MAS2_I | MAS2_G)) 4187 return (EPERM); 4188 4189 prot = e.mas3 & (MAS3_SR | MAS3_SW); 4190 if (prot != (MAS3_SR | MAS3_SW)) 4191 return (EPERM); 4192 4193 /* The address should be within the entry range. */ 4194 entry_tsize = (e.mas1 & MAS1_TSIZE_MASK) >> MAS1_TSIZE_SHIFT; 4195 KASSERT((entry_tsize), ("tlb1_iomapped: invalid entry tsize")); 4196 4197 entry_size = tsize2size(entry_tsize); 4198 pa_start = (((vm_paddr_t)e.mas7 & MAS7_RPN) << 32) | 4199 (e.mas3 & MAS3_RPN); 4200 pa_end = pa_start + entry_size; 4201 4202 if ((pa < pa_start) || ((pa + size) > pa_end)) 4203 return (ERANGE); 4204 4205 /* Return virtual address of this mapping. */ 4206 *va = (e.mas2 & MAS2_EPN_MASK) + (pa - pa_start); 4207 return (0); 4208 } 4209 4210 /* 4211 * Invalidate all TLB0 entries which match the given TID. Note this is 4212 * dedicated for cases when invalidations should NOT be propagated to other 4213 * CPUs. 4214 */ 4215 static void 4216 tid_flush(tlbtid_t tid) 4217 { 4218 register_t msr; 4219 uint32_t mas0, mas1, mas2; 4220 int entry, way; 4221 4222 4223 /* Don't evict kernel translations */ 4224 if (tid == TID_KERNEL) 4225 return; 4226 4227 msr = mfmsr(); 4228 __asm __volatile("wrteei 0"); 4229 4230 /* 4231 * Newer (e500mc and later) have tlbilx, which doesn't broadcast, so use 4232 * it for PID invalidation. 4233 */ 4234 switch ((mfpvr() >> 16) & 0xffff) { 4235 case FSL_E500mc: 4236 case FSL_E5500: 4237 case FSL_E6500: 4238 mtspr(SPR_MAS6, tid << MAS6_SPID0_SHIFT); 4239 /* tlbilxpid */ 4240 __asm __volatile("isync; .long 0x7c000024; isync; msync"); 4241 __asm __volatile("wrtee %0" :: "r"(msr)); 4242 return; 4243 } 4244 4245 for (way = 0; way < TLB0_WAYS; way++) 4246 for (entry = 0; entry < TLB0_ENTRIES_PER_WAY; entry++) { 4247 4248 mas0 = MAS0_TLBSEL(0) | MAS0_ESEL(way); 4249 mtspr(SPR_MAS0, mas0); 4250 4251 mas2 = entry << MAS2_TLB0_ENTRY_IDX_SHIFT; 4252 mtspr(SPR_MAS2, mas2); 4253 4254 __asm __volatile("isync; tlbre"); 4255 4256 mas1 = mfspr(SPR_MAS1); 4257 4258 if (!(mas1 & MAS1_VALID)) 4259 continue; 4260 if (((mas1 & MAS1_TID_MASK) >> MAS1_TID_SHIFT) != tid) 4261 continue; 4262 mas1 &= ~MAS1_VALID; 4263 mtspr(SPR_MAS1, mas1); 4264 __asm __volatile("isync; tlbwe; isync; msync"); 4265 } 4266 __asm __volatile("wrtee %0" :: "r"(msr)); 4267 } 4268 4269 #ifdef DDB 4270 /* Print out contents of the MAS registers for each TLB0 entry */ 4271 static void 4272 #ifdef __powerpc64__ 4273 tlb_print_entry(int i, uint32_t mas1, uint64_t mas2, uint32_t mas3, 4274 #else 4275 tlb_print_entry(int i, uint32_t mas1, uint32_t mas2, uint32_t mas3, 4276 #endif 4277 uint32_t mas7) 4278 { 4279 int as; 4280 char desc[3]; 4281 tlbtid_t tid; 4282 vm_size_t size; 4283 unsigned int tsize; 4284 4285 desc[2] = '\0'; 4286 if (mas1 & MAS1_VALID) 4287 desc[0] = 'V'; 4288 else 4289 desc[0] = ' '; 4290 4291 if (mas1 & MAS1_IPROT) 4292 desc[1] = 'P'; 4293 else 4294 desc[1] = ' '; 4295 4296 as = (mas1 & MAS1_TS_MASK) ? 1 : 0; 4297 tid = MAS1_GETTID(mas1); 4298 4299 tsize = (mas1 & MAS1_TSIZE_MASK) >> MAS1_TSIZE_SHIFT; 4300 size = 0; 4301 if (tsize) 4302 size = tsize2size(tsize); 4303 4304 printf("%3d: (%s) [AS=%d] " 4305 "sz = 0x%jx tsz = %d tid = %d mas1 = 0x%08x " 4306 "mas2(va) = 0x%"PRI0ptrX" mas3(pa) = 0x%08x mas7 = 0x%08x\n", 4307 i, desc, as, (uintmax_t)size, tsize, tid, mas1, mas2, mas3, mas7); 4308 } 4309 4310 DB_SHOW_COMMAND(tlb0, tlb0_print_tlbentries) 4311 { 4312 uint32_t mas0, mas1, mas3, mas7; 4313 #ifdef __powerpc64__ 4314 uint64_t mas2; 4315 #else 4316 uint32_t mas2; 4317 #endif 4318 int entryidx, way, idx; 4319 4320 printf("TLB0 entries:\n"); 4321 for (way = 0; way < TLB0_WAYS; way ++) 4322 for (entryidx = 0; entryidx < TLB0_ENTRIES_PER_WAY; entryidx++) { 4323 4324 mas0 = MAS0_TLBSEL(0) | MAS0_ESEL(way); 4325 mtspr(SPR_MAS0, mas0); 4326 4327 mas2 = entryidx << MAS2_TLB0_ENTRY_IDX_SHIFT; 4328 mtspr(SPR_MAS2, mas2); 4329 4330 __asm __volatile("isync; tlbre"); 4331 4332 mas1 = mfspr(SPR_MAS1); 4333 mas2 = mfspr(SPR_MAS2); 4334 mas3 = mfspr(SPR_MAS3); 4335 mas7 = mfspr(SPR_MAS7); 4336 4337 idx = tlb0_tableidx(mas2, way); 4338 tlb_print_entry(idx, mas1, mas2, mas3, mas7); 4339 } 4340 } 4341 4342 /* 4343 * Print out contents of the MAS registers for each TLB1 entry 4344 */ 4345 DB_SHOW_COMMAND(tlb1, tlb1_print_tlbentries) 4346 { 4347 uint32_t mas0, mas1, mas3, mas7; 4348 #ifdef __powerpc64__ 4349 uint64_t mas2; 4350 #else 4351 uint32_t mas2; 4352 #endif 4353 int i; 4354 4355 printf("TLB1 entries:\n"); 4356 for (i = 0; i < TLB1_ENTRIES; i++) { 4357 4358 mas0 = MAS0_TLBSEL(1) | MAS0_ESEL(i); 4359 mtspr(SPR_MAS0, mas0); 4360 4361 __asm __volatile("isync; tlbre"); 4362 4363 mas1 = mfspr(SPR_MAS1); 4364 mas2 = mfspr(SPR_MAS2); 4365 mas3 = mfspr(SPR_MAS3); 4366 mas7 = mfspr(SPR_MAS7); 4367 4368 tlb_print_entry(i, mas1, mas2, mas3, mas7); 4369 } 4370 } 4371 #endif 4372