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 - ptbl_bufs-1 : message buffer 63 * ptbl_bufs - kernel_pdir-1 : kernel page tables 64 * kernel_pdir - kernel_pp2d-1 : kernel page directory 65 * kernel_pp2d - . : kernel pointers to page directory 66 * pmap_zero_copy_min - crashdumpmap-1 : reserved for page zero/copy 67 * crashdumpmap - ptbl_buf_pool_vabase-1 : reserved for ptbl bufs 68 * ptbl_buf_pool_vabase - virtual_avail-1 : user page directories and page tables 69 * virtual_avail - 0xcfff_ffff_ffff_ffff : actual free KVA space 70 * 0xd000_0000_0000_0000 - 0xdfff_ffff_ffff_ffff : coprocessor region 71 * 0xe000_0000_0000_0000 - 0xefff_ffff_ffff_ffff : mmio region 72 * 0xf000_0000_0000_0000 - 0xffff_ffff_ffff_ffff : direct map 73 * 0xf000_0000_0000_0000 - +Maxmem : physmem map 74 * - 0xffff_ffff_ffff_ffff : device direct map 75 */ 76 77 #include <sys/cdefs.h> 78 __FBSDID("$FreeBSD$"); 79 80 #include "opt_ddb.h" 81 #include "opt_kstack_pages.h" 82 83 #include <sys/param.h> 84 #include <sys/conf.h> 85 #include <sys/malloc.h> 86 #include <sys/ktr.h> 87 #include <sys/proc.h> 88 #include <sys/user.h> 89 #include <sys/queue.h> 90 #include <sys/systm.h> 91 #include <sys/kernel.h> 92 #include <sys/kerneldump.h> 93 #include <sys/linker.h> 94 #include <sys/msgbuf.h> 95 #include <sys/lock.h> 96 #include <sys/mutex.h> 97 #include <sys/rwlock.h> 98 #include <sys/sched.h> 99 #include <sys/smp.h> 100 #include <sys/vmmeter.h> 101 102 #include <vm/vm.h> 103 #include <vm/vm_page.h> 104 #include <vm/vm_kern.h> 105 #include <vm/vm_pageout.h> 106 #include <vm/vm_extern.h> 107 #include <vm/vm_object.h> 108 #include <vm/vm_param.h> 109 #include <vm/vm_map.h> 110 #include <vm/vm_pager.h> 111 #include <vm/vm_phys.h> 112 #include <vm/vm_pagequeue.h> 113 #include <vm/uma.h> 114 115 #include <machine/_inttypes.h> 116 #include <machine/cpu.h> 117 #include <machine/pcb.h> 118 #include <machine/platform.h> 119 120 #include <machine/tlb.h> 121 #include <machine/spr.h> 122 #include <machine/md_var.h> 123 #include <machine/mmuvar.h> 124 #include <machine/pmap.h> 125 #include <machine/pte.h> 126 127 #include <ddb/ddb.h> 128 129 #include "mmu_if.h" 130 131 #define SPARSE_MAPDEV 132 #ifdef DEBUG 133 #define debugf(fmt, args...) printf(fmt, ##args) 134 #else 135 #define debugf(fmt, args...) 136 #endif 137 138 #ifdef __powerpc64__ 139 #define PRI0ptrX "016lx" 140 #else 141 #define PRI0ptrX "08x" 142 #endif 143 144 #define TODO panic("%s: not implemented", __func__); 145 146 extern unsigned char _etext[]; 147 extern unsigned char _end[]; 148 149 extern uint32_t *bootinfo; 150 151 vm_paddr_t kernload; 152 vm_offset_t kernstart; 153 vm_size_t kernsize; 154 155 /* Message buffer and tables. */ 156 static vm_offset_t data_start; 157 static vm_size_t data_end; 158 159 /* Phys/avail memory regions. */ 160 static struct mem_region *availmem_regions; 161 static int availmem_regions_sz; 162 static struct mem_region *physmem_regions; 163 static int physmem_regions_sz; 164 165 /* 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 static struct mtx tlbivax_mutex; 170 171 /* Reserved KVA space and mutex for mmu_booke_copy_page. */ 172 static vm_offset_t copy_page_src_va; 173 static vm_offset_t copy_page_dst_va; 174 static struct mtx copy_page_mutex; 175 176 /**************************************************************************/ 177 /* PMAP */ 178 /**************************************************************************/ 179 180 static int mmu_booke_enter_locked(mmu_t, pmap_t, vm_offset_t, vm_page_t, 181 vm_prot_t, u_int flags, int8_t psind); 182 183 unsigned int kptbl_min; /* Index of the first kernel ptbl. */ 184 unsigned int kernel_ptbls; /* Number of KVA ptbls. */ 185 #ifdef __powerpc64__ 186 unsigned int kernel_pdirs; 187 #endif 188 189 /* 190 * If user pmap is processed with mmu_booke_remove and the resident count 191 * drops to 0, there are no more pages to remove, so we need not continue. 192 */ 193 #define PMAP_REMOVE_DONE(pmap) \ 194 ((pmap) != kernel_pmap && (pmap)->pm_stats.resident_count == 0) 195 196 #if defined(COMPAT_FREEBSD32) || !defined(__powerpc64__) 197 extern int elf32_nxstack; 198 #endif 199 200 /**************************************************************************/ 201 /* TLB and TID handling */ 202 /**************************************************************************/ 203 204 /* Translation ID busy table */ 205 static volatile pmap_t tidbusy[MAXCPU][TID_MAX + 1]; 206 207 /* 208 * TLB0 capabilities (entry, way numbers etc.). These can vary between e500 209 * core revisions and should be read from h/w registers during early config. 210 */ 211 uint32_t tlb0_entries; 212 uint32_t tlb0_ways; 213 uint32_t tlb0_entries_per_way; 214 uint32_t tlb1_entries; 215 216 #define TLB0_ENTRIES (tlb0_entries) 217 #define TLB0_WAYS (tlb0_ways) 218 #define TLB0_ENTRIES_PER_WAY (tlb0_entries_per_way) 219 220 #define TLB1_ENTRIES (tlb1_entries) 221 222 static vm_offset_t tlb1_map_base = VM_MAXUSER_ADDRESS + PAGE_SIZE; 223 224 static tlbtid_t tid_alloc(struct pmap *); 225 static void tid_flush(tlbtid_t tid); 226 227 #ifdef DDB 228 #ifdef __powerpc64__ 229 static void tlb_print_entry(int, uint32_t, uint64_t, uint32_t, uint32_t); 230 #else 231 static void tlb_print_entry(int, uint32_t, uint32_t, uint32_t, uint32_t); 232 #endif 233 #endif 234 235 static void tlb1_read_entry(tlb_entry_t *, unsigned int); 236 static void tlb1_write_entry(tlb_entry_t *, unsigned int); 237 static int tlb1_iomapped(int, vm_paddr_t, vm_size_t, vm_offset_t *); 238 static vm_size_t tlb1_mapin_region(vm_offset_t, vm_paddr_t, vm_size_t); 239 240 static vm_size_t tsize2size(unsigned int); 241 static unsigned int size2tsize(vm_size_t); 242 static unsigned int ilog2(unsigned long); 243 244 static void set_mas4_defaults(void); 245 246 static inline void tlb0_flush_entry(vm_offset_t); 247 static inline unsigned int tlb0_tableidx(vm_offset_t, unsigned int); 248 249 /**************************************************************************/ 250 /* Page table management */ 251 /**************************************************************************/ 252 253 static struct rwlock_padalign pvh_global_lock; 254 255 /* Data for the pv entry allocation mechanism */ 256 static uma_zone_t pvzone; 257 static int pv_entry_count = 0, pv_entry_max = 0, pv_entry_high_water = 0; 258 259 #define PV_ENTRY_ZONE_MIN 2048 /* min pv entries in uma zone */ 260 261 #ifndef PMAP_SHPGPERPROC 262 #define PMAP_SHPGPERPROC 200 263 #endif 264 265 static void ptbl_init(void); 266 static struct ptbl_buf *ptbl_buf_alloc(void); 267 static void ptbl_buf_free(struct ptbl_buf *); 268 static void ptbl_free_pmap_ptbl(pmap_t, pte_t *); 269 270 #ifdef __powerpc64__ 271 static pte_t *ptbl_alloc(mmu_t, pmap_t, pte_t **, 272 unsigned int, boolean_t); 273 static void ptbl_free(mmu_t, pmap_t, pte_t **, unsigned int); 274 static void ptbl_hold(mmu_t, pmap_t, pte_t **, unsigned int); 275 static int ptbl_unhold(mmu_t, pmap_t, vm_offset_t); 276 #else 277 static pte_t *ptbl_alloc(mmu_t, pmap_t, unsigned int, boolean_t); 278 static void ptbl_free(mmu_t, pmap_t, unsigned int); 279 static void ptbl_hold(mmu_t, pmap_t, unsigned int); 280 static int ptbl_unhold(mmu_t, pmap_t, unsigned int); 281 #endif 282 283 static vm_paddr_t pte_vatopa(mmu_t, pmap_t, vm_offset_t); 284 static int pte_enter(mmu_t, pmap_t, vm_page_t, vm_offset_t, uint32_t, boolean_t); 285 static int pte_remove(mmu_t, pmap_t, vm_offset_t, uint8_t); 286 static pte_t *pte_find(mmu_t, pmap_t, vm_offset_t); 287 static void kernel_pte_alloc(vm_offset_t, vm_offset_t, vm_offset_t); 288 289 static pv_entry_t pv_alloc(void); 290 static void pv_free(pv_entry_t); 291 static void pv_insert(pmap_t, vm_offset_t, vm_page_t); 292 static void pv_remove(pmap_t, vm_offset_t, vm_page_t); 293 294 static void booke_pmap_init_qpages(void); 295 296 /* Number of kva ptbl buffers, each covering one ptbl (PTBL_PAGES). */ 297 #ifdef __powerpc64__ 298 #define PTBL_BUFS (16UL * 16 * 16) 299 #else 300 #define PTBL_BUFS (128 * 16) 301 #endif 302 303 struct ptbl_buf { 304 TAILQ_ENTRY(ptbl_buf) link; /* list link */ 305 vm_offset_t kva; /* va of mapping */ 306 }; 307 308 /* ptbl free list and a lock used for access synchronization. */ 309 static TAILQ_HEAD(, ptbl_buf) ptbl_buf_freelist; 310 static struct mtx ptbl_buf_freelist_lock; 311 312 /* Base address of kva space allocated fot ptbl bufs. */ 313 static vm_offset_t ptbl_buf_pool_vabase; 314 315 /* Pointer to ptbl_buf structures. */ 316 static struct ptbl_buf *ptbl_bufs; 317 318 #ifdef SMP 319 extern tlb_entry_t __boot_tlb1[]; 320 void pmap_bootstrap_ap(volatile uint32_t *); 321 #endif 322 323 /* 324 * Kernel MMU interface 325 */ 326 static void mmu_booke_clear_modify(mmu_t, vm_page_t); 327 static void mmu_booke_copy(mmu_t, pmap_t, pmap_t, vm_offset_t, 328 vm_size_t, vm_offset_t); 329 static void mmu_booke_copy_page(mmu_t, vm_page_t, vm_page_t); 330 static void mmu_booke_copy_pages(mmu_t, vm_page_t *, 331 vm_offset_t, vm_page_t *, vm_offset_t, int); 332 static int mmu_booke_enter(mmu_t, pmap_t, vm_offset_t, vm_page_t, 333 vm_prot_t, u_int flags, int8_t psind); 334 static void mmu_booke_enter_object(mmu_t, pmap_t, vm_offset_t, vm_offset_t, 335 vm_page_t, vm_prot_t); 336 static void mmu_booke_enter_quick(mmu_t, pmap_t, vm_offset_t, vm_page_t, 337 vm_prot_t); 338 static vm_paddr_t mmu_booke_extract(mmu_t, pmap_t, vm_offset_t); 339 static vm_page_t mmu_booke_extract_and_hold(mmu_t, pmap_t, vm_offset_t, 340 vm_prot_t); 341 static void mmu_booke_init(mmu_t); 342 static boolean_t mmu_booke_is_modified(mmu_t, vm_page_t); 343 static boolean_t mmu_booke_is_prefaultable(mmu_t, pmap_t, vm_offset_t); 344 static boolean_t mmu_booke_is_referenced(mmu_t, vm_page_t); 345 static int mmu_booke_ts_referenced(mmu_t, vm_page_t); 346 static vm_offset_t mmu_booke_map(mmu_t, vm_offset_t *, vm_paddr_t, vm_paddr_t, 347 int); 348 static int mmu_booke_mincore(mmu_t, pmap_t, vm_offset_t, 349 vm_paddr_t *); 350 static void mmu_booke_object_init_pt(mmu_t, pmap_t, vm_offset_t, 351 vm_object_t, vm_pindex_t, vm_size_t); 352 static boolean_t mmu_booke_page_exists_quick(mmu_t, pmap_t, vm_page_t); 353 static void mmu_booke_page_init(mmu_t, vm_page_t); 354 static int mmu_booke_page_wired_mappings(mmu_t, vm_page_t); 355 static void mmu_booke_pinit(mmu_t, pmap_t); 356 static void mmu_booke_pinit0(mmu_t, pmap_t); 357 static void mmu_booke_protect(mmu_t, pmap_t, vm_offset_t, vm_offset_t, 358 vm_prot_t); 359 static void mmu_booke_qenter(mmu_t, vm_offset_t, vm_page_t *, int); 360 static void mmu_booke_qremove(mmu_t, vm_offset_t, int); 361 static void mmu_booke_release(mmu_t, pmap_t); 362 static void mmu_booke_remove(mmu_t, pmap_t, vm_offset_t, vm_offset_t); 363 static void mmu_booke_remove_all(mmu_t, vm_page_t); 364 static void mmu_booke_remove_write(mmu_t, vm_page_t); 365 static void mmu_booke_unwire(mmu_t, pmap_t, vm_offset_t, vm_offset_t); 366 static void mmu_booke_zero_page(mmu_t, vm_page_t); 367 static void mmu_booke_zero_page_area(mmu_t, vm_page_t, int, int); 368 static void mmu_booke_activate(mmu_t, struct thread *); 369 static void mmu_booke_deactivate(mmu_t, struct thread *); 370 static void mmu_booke_bootstrap(mmu_t, vm_offset_t, vm_offset_t); 371 static void *mmu_booke_mapdev(mmu_t, vm_paddr_t, vm_size_t); 372 static void *mmu_booke_mapdev_attr(mmu_t, vm_paddr_t, vm_size_t, vm_memattr_t); 373 static void mmu_booke_unmapdev(mmu_t, vm_offset_t, vm_size_t); 374 static vm_paddr_t mmu_booke_kextract(mmu_t, vm_offset_t); 375 static void mmu_booke_kenter(mmu_t, vm_offset_t, vm_paddr_t); 376 static void mmu_booke_kenter_attr(mmu_t, vm_offset_t, vm_paddr_t, vm_memattr_t); 377 static void mmu_booke_kremove(mmu_t, vm_offset_t); 378 static boolean_t mmu_booke_dev_direct_mapped(mmu_t, vm_paddr_t, vm_size_t); 379 static void mmu_booke_sync_icache(mmu_t, pmap_t, vm_offset_t, 380 vm_size_t); 381 static void mmu_booke_dumpsys_map(mmu_t, vm_paddr_t pa, size_t, 382 void **); 383 static void mmu_booke_dumpsys_unmap(mmu_t, vm_paddr_t pa, size_t, 384 void *); 385 static void mmu_booke_scan_init(mmu_t); 386 static vm_offset_t mmu_booke_quick_enter_page(mmu_t mmu, vm_page_t m); 387 static void mmu_booke_quick_remove_page(mmu_t mmu, vm_offset_t addr); 388 static int mmu_booke_change_attr(mmu_t mmu, vm_offset_t addr, 389 vm_size_t sz, vm_memattr_t mode); 390 static int mmu_booke_map_user_ptr(mmu_t mmu, pmap_t pm, 391 volatile const void *uaddr, void **kaddr, size_t ulen, size_t *klen); 392 static int mmu_booke_decode_kernel_ptr(mmu_t mmu, vm_offset_t addr, 393 int *is_user, vm_offset_t *decoded_addr); 394 395 396 static mmu_method_t mmu_booke_methods[] = { 397 /* pmap dispatcher interface */ 398 MMUMETHOD(mmu_clear_modify, mmu_booke_clear_modify), 399 MMUMETHOD(mmu_copy, mmu_booke_copy), 400 MMUMETHOD(mmu_copy_page, mmu_booke_copy_page), 401 MMUMETHOD(mmu_copy_pages, mmu_booke_copy_pages), 402 MMUMETHOD(mmu_enter, mmu_booke_enter), 403 MMUMETHOD(mmu_enter_object, mmu_booke_enter_object), 404 MMUMETHOD(mmu_enter_quick, mmu_booke_enter_quick), 405 MMUMETHOD(mmu_extract, mmu_booke_extract), 406 MMUMETHOD(mmu_extract_and_hold, mmu_booke_extract_and_hold), 407 MMUMETHOD(mmu_init, mmu_booke_init), 408 MMUMETHOD(mmu_is_modified, mmu_booke_is_modified), 409 MMUMETHOD(mmu_is_prefaultable, mmu_booke_is_prefaultable), 410 MMUMETHOD(mmu_is_referenced, mmu_booke_is_referenced), 411 MMUMETHOD(mmu_ts_referenced, mmu_booke_ts_referenced), 412 MMUMETHOD(mmu_map, mmu_booke_map), 413 MMUMETHOD(mmu_mincore, mmu_booke_mincore), 414 MMUMETHOD(mmu_object_init_pt, mmu_booke_object_init_pt), 415 MMUMETHOD(mmu_page_exists_quick,mmu_booke_page_exists_quick), 416 MMUMETHOD(mmu_page_init, mmu_booke_page_init), 417 MMUMETHOD(mmu_page_wired_mappings, mmu_booke_page_wired_mappings), 418 MMUMETHOD(mmu_pinit, mmu_booke_pinit), 419 MMUMETHOD(mmu_pinit0, mmu_booke_pinit0), 420 MMUMETHOD(mmu_protect, mmu_booke_protect), 421 MMUMETHOD(mmu_qenter, mmu_booke_qenter), 422 MMUMETHOD(mmu_qremove, mmu_booke_qremove), 423 MMUMETHOD(mmu_release, mmu_booke_release), 424 MMUMETHOD(mmu_remove, mmu_booke_remove), 425 MMUMETHOD(mmu_remove_all, mmu_booke_remove_all), 426 MMUMETHOD(mmu_remove_write, mmu_booke_remove_write), 427 MMUMETHOD(mmu_sync_icache, mmu_booke_sync_icache), 428 MMUMETHOD(mmu_unwire, mmu_booke_unwire), 429 MMUMETHOD(mmu_zero_page, mmu_booke_zero_page), 430 MMUMETHOD(mmu_zero_page_area, mmu_booke_zero_page_area), 431 MMUMETHOD(mmu_activate, mmu_booke_activate), 432 MMUMETHOD(mmu_deactivate, mmu_booke_deactivate), 433 MMUMETHOD(mmu_quick_enter_page, mmu_booke_quick_enter_page), 434 MMUMETHOD(mmu_quick_remove_page, mmu_booke_quick_remove_page), 435 436 /* Internal interfaces */ 437 MMUMETHOD(mmu_bootstrap, mmu_booke_bootstrap), 438 MMUMETHOD(mmu_dev_direct_mapped,mmu_booke_dev_direct_mapped), 439 MMUMETHOD(mmu_mapdev, mmu_booke_mapdev), 440 MMUMETHOD(mmu_mapdev_attr, mmu_booke_mapdev_attr), 441 MMUMETHOD(mmu_kenter, mmu_booke_kenter), 442 MMUMETHOD(mmu_kenter_attr, mmu_booke_kenter_attr), 443 MMUMETHOD(mmu_kextract, mmu_booke_kextract), 444 MMUMETHOD(mmu_kremove, mmu_booke_kremove), 445 MMUMETHOD(mmu_unmapdev, mmu_booke_unmapdev), 446 MMUMETHOD(mmu_change_attr, mmu_booke_change_attr), 447 MMUMETHOD(mmu_map_user_ptr, mmu_booke_map_user_ptr), 448 MMUMETHOD(mmu_decode_kernel_ptr, mmu_booke_decode_kernel_ptr), 449 450 /* dumpsys() support */ 451 MMUMETHOD(mmu_dumpsys_map, mmu_booke_dumpsys_map), 452 MMUMETHOD(mmu_dumpsys_unmap, mmu_booke_dumpsys_unmap), 453 MMUMETHOD(mmu_scan_init, mmu_booke_scan_init), 454 455 { 0, 0 } 456 }; 457 458 MMU_DEF(booke_mmu, MMU_TYPE_BOOKE, mmu_booke_methods, 0); 459 460 static __inline uint32_t 461 tlb_calc_wimg(vm_paddr_t pa, vm_memattr_t ma) 462 { 463 uint32_t attrib; 464 int i; 465 466 if (ma != VM_MEMATTR_DEFAULT) { 467 switch (ma) { 468 case VM_MEMATTR_UNCACHEABLE: 469 return (MAS2_I | MAS2_G); 470 case VM_MEMATTR_WRITE_COMBINING: 471 case VM_MEMATTR_WRITE_BACK: 472 case VM_MEMATTR_PREFETCHABLE: 473 return (MAS2_I); 474 case VM_MEMATTR_WRITE_THROUGH: 475 return (MAS2_W | MAS2_M); 476 case VM_MEMATTR_CACHEABLE: 477 return (MAS2_M); 478 } 479 } 480 481 /* 482 * Assume the page is cache inhibited and access is guarded unless 483 * it's in our available memory array. 484 */ 485 attrib = _TLB_ENTRY_IO; 486 for (i = 0; i < physmem_regions_sz; i++) { 487 if ((pa >= physmem_regions[i].mr_start) && 488 (pa < (physmem_regions[i].mr_start + 489 physmem_regions[i].mr_size))) { 490 attrib = _TLB_ENTRY_MEM; 491 break; 492 } 493 } 494 495 return (attrib); 496 } 497 498 static inline void 499 tlb_miss_lock(void) 500 { 501 #ifdef SMP 502 struct pcpu *pc; 503 504 if (!smp_started) 505 return; 506 507 STAILQ_FOREACH(pc, &cpuhead, pc_allcpu) { 508 if (pc != pcpup) { 509 510 CTR3(KTR_PMAP, "%s: tlb miss LOCK of CPU=%d, " 511 "tlb_lock=%p", __func__, pc->pc_cpuid, pc->pc_booke.tlb_lock); 512 513 KASSERT((pc->pc_cpuid != PCPU_GET(cpuid)), 514 ("tlb_miss_lock: tried to lock self")); 515 516 tlb_lock(pc->pc_booke.tlb_lock); 517 518 CTR1(KTR_PMAP, "%s: locked", __func__); 519 } 520 } 521 #endif 522 } 523 524 static inline void 525 tlb_miss_unlock(void) 526 { 527 #ifdef SMP 528 struct pcpu *pc; 529 530 if (!smp_started) 531 return; 532 533 STAILQ_FOREACH(pc, &cpuhead, pc_allcpu) { 534 if (pc != pcpup) { 535 CTR2(KTR_PMAP, "%s: tlb miss UNLOCK of CPU=%d", 536 __func__, pc->pc_cpuid); 537 538 tlb_unlock(pc->pc_booke.tlb_lock); 539 540 CTR1(KTR_PMAP, "%s: unlocked", __func__); 541 } 542 } 543 #endif 544 } 545 546 /* Return number of entries in TLB0. */ 547 static __inline void 548 tlb0_get_tlbconf(void) 549 { 550 uint32_t tlb0_cfg; 551 552 tlb0_cfg = mfspr(SPR_TLB0CFG); 553 tlb0_entries = tlb0_cfg & TLBCFG_NENTRY_MASK; 554 tlb0_ways = (tlb0_cfg & TLBCFG_ASSOC_MASK) >> TLBCFG_ASSOC_SHIFT; 555 tlb0_entries_per_way = tlb0_entries / tlb0_ways; 556 } 557 558 /* Return number of entries in TLB1. */ 559 static __inline void 560 tlb1_get_tlbconf(void) 561 { 562 uint32_t tlb1_cfg; 563 564 tlb1_cfg = mfspr(SPR_TLB1CFG); 565 tlb1_entries = tlb1_cfg & TLBCFG_NENTRY_MASK; 566 } 567 568 /**************************************************************************/ 569 /* Page table related */ 570 /**************************************************************************/ 571 572 #ifdef __powerpc64__ 573 /* Initialize pool of kva ptbl buffers. */ 574 static void 575 ptbl_init(void) 576 { 577 int i; 578 579 mtx_init(&ptbl_buf_freelist_lock, "ptbl bufs lock", NULL, MTX_DEF); 580 TAILQ_INIT(&ptbl_buf_freelist); 581 582 for (i = 0; i < PTBL_BUFS; i++) { 583 ptbl_bufs[i].kva = ptbl_buf_pool_vabase + 584 i * MAX(PTBL_PAGES,PDIR_PAGES) * PAGE_SIZE; 585 TAILQ_INSERT_TAIL(&ptbl_buf_freelist, &ptbl_bufs[i], link); 586 } 587 } 588 589 /* Get an sf_buf from the freelist. */ 590 static struct ptbl_buf * 591 ptbl_buf_alloc(void) 592 { 593 struct ptbl_buf *buf; 594 595 mtx_lock(&ptbl_buf_freelist_lock); 596 buf = TAILQ_FIRST(&ptbl_buf_freelist); 597 if (buf != NULL) 598 TAILQ_REMOVE(&ptbl_buf_freelist, buf, link); 599 mtx_unlock(&ptbl_buf_freelist_lock); 600 601 return (buf); 602 } 603 604 /* Return ptbl buff to free pool. */ 605 static void 606 ptbl_buf_free(struct ptbl_buf *buf) 607 { 608 mtx_lock(&ptbl_buf_freelist_lock); 609 TAILQ_INSERT_TAIL(&ptbl_buf_freelist, buf, link); 610 mtx_unlock(&ptbl_buf_freelist_lock); 611 } 612 613 /* 614 * Search the list of allocated ptbl bufs and find on list of allocated ptbls 615 */ 616 static void 617 ptbl_free_pmap_ptbl(pmap_t pmap, pte_t * ptbl) 618 { 619 struct ptbl_buf *pbuf; 620 621 TAILQ_FOREACH(pbuf, &pmap->pm_ptbl_list, link) { 622 if (pbuf->kva == (vm_offset_t) ptbl) { 623 /* Remove from pmap ptbl buf list. */ 624 TAILQ_REMOVE(&pmap->pm_ptbl_list, pbuf, link); 625 626 /* Free corresponding ptbl buf. */ 627 ptbl_buf_free(pbuf); 628 629 break; 630 } 631 } 632 } 633 634 /* Get a pointer to a PTE in a page table. */ 635 static __inline pte_t * 636 pte_find(mmu_t mmu, pmap_t pmap, vm_offset_t va) 637 { 638 pte_t **pdir; 639 pte_t *ptbl; 640 641 KASSERT((pmap != NULL), ("pte_find: invalid pmap")); 642 643 pdir = pmap->pm_pp2d[PP2D_IDX(va)]; 644 if (!pdir) 645 return NULL; 646 ptbl = pdir[PDIR_IDX(va)]; 647 return ((ptbl != NULL) ? &ptbl[PTBL_IDX(va)] : NULL); 648 } 649 650 /* 651 * Search the list of allocated pdir bufs and find on list of allocated pdirs 652 */ 653 static void 654 ptbl_free_pmap_pdir(mmu_t mmu, pmap_t pmap, pte_t ** pdir) 655 { 656 struct ptbl_buf *pbuf; 657 658 TAILQ_FOREACH(pbuf, &pmap->pm_pdir_list, link) { 659 if (pbuf->kva == (vm_offset_t) pdir) { 660 /* Remove from pmap ptbl buf list. */ 661 TAILQ_REMOVE(&pmap->pm_pdir_list, pbuf, link); 662 663 /* Free corresponding pdir buf. */ 664 ptbl_buf_free(pbuf); 665 666 break; 667 } 668 } 669 } 670 /* Free pdir pages and invalidate pdir entry. */ 671 static void 672 pdir_free(mmu_t mmu, pmap_t pmap, unsigned int pp2d_idx) 673 { 674 pte_t **pdir; 675 vm_paddr_t pa; 676 vm_offset_t va; 677 vm_page_t m; 678 int i; 679 680 pdir = pmap->pm_pp2d[pp2d_idx]; 681 682 KASSERT((pdir != NULL), ("pdir_free: null pdir")); 683 684 pmap->pm_pp2d[pp2d_idx] = NULL; 685 686 for (i = 0; i < PDIR_PAGES; i++) { 687 va = ((vm_offset_t) pdir + (i * PAGE_SIZE)); 688 pa = pte_vatopa(mmu, kernel_pmap, va); 689 m = PHYS_TO_VM_PAGE(pa); 690 vm_page_free_zero(m); 691 vm_wire_sub(1); 692 pmap_kremove(va); 693 } 694 695 ptbl_free_pmap_pdir(mmu, pmap, pdir); 696 } 697 698 /* 699 * Decrement pdir pages hold count and attempt to free pdir pages. Called 700 * when removing directory entry from pdir. 701 * 702 * Return 1 if pdir pages were freed. 703 */ 704 static int 705 pdir_unhold(mmu_t mmu, pmap_t pmap, u_int pp2d_idx) 706 { 707 pte_t **pdir; 708 vm_paddr_t pa; 709 vm_page_t m; 710 int i; 711 712 KASSERT((pmap != kernel_pmap), 713 ("pdir_unhold: unholding kernel pdir!")); 714 715 pdir = pmap->pm_pp2d[pp2d_idx]; 716 717 KASSERT(((vm_offset_t) pdir >= VM_MIN_KERNEL_ADDRESS), 718 ("pdir_unhold: non kva pdir")); 719 720 /* decrement hold count */ 721 for (i = 0; i < PDIR_PAGES; i++) { 722 pa = pte_vatopa(mmu, kernel_pmap, 723 (vm_offset_t) pdir + (i * PAGE_SIZE)); 724 m = PHYS_TO_VM_PAGE(pa); 725 m->wire_count--; 726 } 727 728 /* 729 * Free pdir pages if there are no dir entries in this pdir. 730 * wire_count has the same value for all ptbl pages, so check the 731 * last page. 732 */ 733 if (m->wire_count == 0) { 734 pdir_free(mmu, pmap, pp2d_idx); 735 return (1); 736 } 737 return (0); 738 } 739 740 /* 741 * Increment hold count for pdir pages. This routine is used when new ptlb 742 * entry is being inserted into pdir. 743 */ 744 static void 745 pdir_hold(mmu_t mmu, pmap_t pmap, pte_t ** pdir) 746 { 747 vm_paddr_t pa; 748 vm_page_t m; 749 int i; 750 751 KASSERT((pmap != kernel_pmap), 752 ("pdir_hold: holding kernel pdir!")); 753 754 KASSERT((pdir != NULL), ("pdir_hold: null pdir")); 755 756 for (i = 0; i < PDIR_PAGES; i++) { 757 pa = pte_vatopa(mmu, kernel_pmap, 758 (vm_offset_t) pdir + (i * PAGE_SIZE)); 759 m = PHYS_TO_VM_PAGE(pa); 760 m->wire_count++; 761 } 762 } 763 764 /* Allocate page table. */ 765 static pte_t * 766 ptbl_alloc(mmu_t mmu, pmap_t pmap, pte_t ** pdir, unsigned int pdir_idx, 767 boolean_t nosleep) 768 { 769 vm_page_t mtbl [PTBL_PAGES]; 770 vm_page_t m; 771 struct ptbl_buf *pbuf; 772 unsigned int pidx; 773 pte_t *ptbl; 774 int i, j; 775 int req; 776 777 KASSERT((pdir[pdir_idx] == NULL), 778 ("%s: valid ptbl entry exists!", __func__)); 779 780 pbuf = ptbl_buf_alloc(); 781 if (pbuf == NULL) 782 panic("%s: couldn't alloc kernel virtual memory", __func__); 783 784 ptbl = (pte_t *) pbuf->kva; 785 786 for (i = 0; i < PTBL_PAGES; i++) { 787 pidx = (PTBL_PAGES * pdir_idx) + i; 788 req = VM_ALLOC_NOOBJ | VM_ALLOC_WIRED; 789 while ((m = vm_page_alloc(NULL, pidx, req)) == NULL) { 790 PMAP_UNLOCK(pmap); 791 rw_wunlock(&pvh_global_lock); 792 if (nosleep) { 793 ptbl_free_pmap_ptbl(pmap, ptbl); 794 for (j = 0; j < i; j++) 795 vm_page_free(mtbl[j]); 796 vm_wire_sub(i); 797 return (NULL); 798 } 799 vm_wait(NULL); 800 rw_wlock(&pvh_global_lock); 801 PMAP_LOCK(pmap); 802 } 803 mtbl[i] = m; 804 } 805 806 /* Mapin allocated pages into kernel_pmap. */ 807 mmu_booke_qenter(mmu, (vm_offset_t) ptbl, mtbl, PTBL_PAGES); 808 /* Zero whole ptbl. */ 809 bzero((caddr_t) ptbl, PTBL_PAGES * PAGE_SIZE); 810 811 /* Add pbuf to the pmap ptbl bufs list. */ 812 TAILQ_INSERT_TAIL(&pmap->pm_ptbl_list, pbuf, link); 813 814 return (ptbl); 815 } 816 817 /* Free ptbl pages and invalidate pdir entry. */ 818 static void 819 ptbl_free(mmu_t mmu, pmap_t pmap, pte_t ** pdir, unsigned int pdir_idx) 820 { 821 pte_t *ptbl; 822 vm_paddr_t pa; 823 vm_offset_t va; 824 vm_page_t m; 825 int i; 826 827 ptbl = pdir[pdir_idx]; 828 829 KASSERT((ptbl != NULL), ("ptbl_free: null ptbl")); 830 831 pdir[pdir_idx] = NULL; 832 833 for (i = 0; i < PTBL_PAGES; i++) { 834 va = ((vm_offset_t) ptbl + (i * PAGE_SIZE)); 835 pa = pte_vatopa(mmu, kernel_pmap, va); 836 m = PHYS_TO_VM_PAGE(pa); 837 vm_page_free_zero(m); 838 vm_wire_sub(1); 839 pmap_kremove(va); 840 } 841 842 ptbl_free_pmap_ptbl(pmap, ptbl); 843 } 844 845 /* 846 * Decrement ptbl pages hold count and attempt to free ptbl pages. Called 847 * when removing pte entry from ptbl. 848 * 849 * Return 1 if ptbl pages were freed. 850 */ 851 static int 852 ptbl_unhold(mmu_t mmu, pmap_t pmap, vm_offset_t va) 853 { 854 pte_t *ptbl; 855 vm_paddr_t pa; 856 vm_page_t m; 857 u_int pp2d_idx; 858 pte_t **pdir; 859 u_int pdir_idx; 860 int i; 861 862 pp2d_idx = PP2D_IDX(va); 863 pdir_idx = PDIR_IDX(va); 864 865 KASSERT((pmap != kernel_pmap), 866 ("ptbl_unhold: unholding kernel ptbl!")); 867 868 pdir = pmap->pm_pp2d[pp2d_idx]; 869 ptbl = pdir[pdir_idx]; 870 871 KASSERT(((vm_offset_t) ptbl >= VM_MIN_KERNEL_ADDRESS), 872 ("ptbl_unhold: non kva ptbl")); 873 874 /* decrement hold count */ 875 for (i = 0; i < PTBL_PAGES; i++) { 876 pa = pte_vatopa(mmu, kernel_pmap, 877 (vm_offset_t) ptbl + (i * PAGE_SIZE)); 878 m = PHYS_TO_VM_PAGE(pa); 879 m->wire_count--; 880 } 881 882 /* 883 * Free ptbl pages if there are no pte entries in this ptbl. 884 * wire_count has the same value for all ptbl pages, so check the 885 * last page. 886 */ 887 if (m->wire_count == 0) { 888 /* A pair of indirect entries might point to this ptbl page */ 889 #if 0 890 tlb_flush_entry(pmap, va & ~((2UL * PAGE_SIZE_1M) - 1), 891 TLB_SIZE_1M, MAS6_SIND); 892 tlb_flush_entry(pmap, (va & ~((2UL * PAGE_SIZE_1M) - 1)) | PAGE_SIZE_1M, 893 TLB_SIZE_1M, MAS6_SIND); 894 #endif 895 ptbl_free(mmu, pmap, pdir, pdir_idx); 896 pdir_unhold(mmu, pmap, pp2d_idx); 897 return (1); 898 } 899 return (0); 900 } 901 902 /* 903 * Increment hold count for ptbl pages. This routine is used when new pte 904 * entry is being inserted into ptbl. 905 */ 906 static void 907 ptbl_hold(mmu_t mmu, pmap_t pmap, pte_t ** pdir, unsigned int pdir_idx) 908 { 909 vm_paddr_t pa; 910 pte_t *ptbl; 911 vm_page_t m; 912 int i; 913 914 KASSERT((pmap != kernel_pmap), 915 ("ptbl_hold: holding kernel ptbl!")); 916 917 ptbl = pdir[pdir_idx]; 918 919 KASSERT((ptbl != NULL), ("ptbl_hold: null ptbl")); 920 921 for (i = 0; i < PTBL_PAGES; i++) { 922 pa = pte_vatopa(mmu, kernel_pmap, 923 (vm_offset_t) ptbl + (i * PAGE_SIZE)); 924 m = PHYS_TO_VM_PAGE(pa); 925 m->wire_count++; 926 } 927 } 928 #else 929 930 /* Initialize pool of kva ptbl buffers. */ 931 static void 932 ptbl_init(void) 933 { 934 int i; 935 936 CTR3(KTR_PMAP, "%s: s (ptbl_bufs = 0x%08x size 0x%08x)", __func__, 937 (uint32_t)ptbl_bufs, sizeof(struct ptbl_buf) * PTBL_BUFS); 938 CTR3(KTR_PMAP, "%s: s (ptbl_buf_pool_vabase = 0x%08x size = 0x%08x)", 939 __func__, ptbl_buf_pool_vabase, PTBL_BUFS * PTBL_PAGES * PAGE_SIZE); 940 941 mtx_init(&ptbl_buf_freelist_lock, "ptbl bufs lock", NULL, MTX_DEF); 942 TAILQ_INIT(&ptbl_buf_freelist); 943 944 for (i = 0; i < PTBL_BUFS; i++) { 945 ptbl_bufs[i].kva = 946 ptbl_buf_pool_vabase + i * PTBL_PAGES * PAGE_SIZE; 947 TAILQ_INSERT_TAIL(&ptbl_buf_freelist, &ptbl_bufs[i], link); 948 } 949 } 950 951 /* Get a ptbl_buf from the freelist. */ 952 static struct ptbl_buf * 953 ptbl_buf_alloc(void) 954 { 955 struct ptbl_buf *buf; 956 957 mtx_lock(&ptbl_buf_freelist_lock); 958 buf = TAILQ_FIRST(&ptbl_buf_freelist); 959 if (buf != NULL) 960 TAILQ_REMOVE(&ptbl_buf_freelist, buf, link); 961 mtx_unlock(&ptbl_buf_freelist_lock); 962 963 CTR2(KTR_PMAP, "%s: buf = %p", __func__, buf); 964 965 return (buf); 966 } 967 968 /* Return ptbl buff to free pool. */ 969 static void 970 ptbl_buf_free(struct ptbl_buf *buf) 971 { 972 973 CTR2(KTR_PMAP, "%s: buf = %p", __func__, buf); 974 975 mtx_lock(&ptbl_buf_freelist_lock); 976 TAILQ_INSERT_TAIL(&ptbl_buf_freelist, buf, link); 977 mtx_unlock(&ptbl_buf_freelist_lock); 978 } 979 980 /* 981 * Search the list of allocated ptbl bufs and find on list of allocated ptbls 982 */ 983 static void 984 ptbl_free_pmap_ptbl(pmap_t pmap, pte_t *ptbl) 985 { 986 struct ptbl_buf *pbuf; 987 988 CTR2(KTR_PMAP, "%s: ptbl = %p", __func__, ptbl); 989 990 PMAP_LOCK_ASSERT(pmap, MA_OWNED); 991 992 TAILQ_FOREACH(pbuf, &pmap->pm_ptbl_list, link) 993 if (pbuf->kva == (vm_offset_t)ptbl) { 994 /* Remove from pmap ptbl buf list. */ 995 TAILQ_REMOVE(&pmap->pm_ptbl_list, pbuf, link); 996 997 /* Free corresponding ptbl buf. */ 998 ptbl_buf_free(pbuf); 999 break; 1000 } 1001 } 1002 1003 /* Allocate page table. */ 1004 static pte_t * 1005 ptbl_alloc(mmu_t mmu, pmap_t pmap, unsigned int pdir_idx, boolean_t nosleep) 1006 { 1007 vm_page_t mtbl[PTBL_PAGES]; 1008 vm_page_t m; 1009 struct ptbl_buf *pbuf; 1010 unsigned int pidx; 1011 pte_t *ptbl; 1012 int i, j; 1013 1014 CTR4(KTR_PMAP, "%s: pmap = %p su = %d pdir_idx = %d", __func__, pmap, 1015 (pmap == kernel_pmap), pdir_idx); 1016 1017 KASSERT((pdir_idx <= (VM_MAXUSER_ADDRESS / PDIR_SIZE)), 1018 ("ptbl_alloc: invalid pdir_idx")); 1019 KASSERT((pmap->pm_pdir[pdir_idx] == NULL), 1020 ("pte_alloc: valid ptbl entry exists!")); 1021 1022 pbuf = ptbl_buf_alloc(); 1023 if (pbuf == NULL) 1024 panic("pte_alloc: couldn't alloc kernel virtual memory"); 1025 1026 ptbl = (pte_t *)pbuf->kva; 1027 1028 CTR2(KTR_PMAP, "%s: ptbl kva = %p", __func__, ptbl); 1029 1030 for (i = 0; i < PTBL_PAGES; i++) { 1031 pidx = (PTBL_PAGES * pdir_idx) + i; 1032 while ((m = vm_page_alloc(NULL, pidx, 1033 VM_ALLOC_NOOBJ | VM_ALLOC_WIRED)) == NULL) { 1034 PMAP_UNLOCK(pmap); 1035 rw_wunlock(&pvh_global_lock); 1036 if (nosleep) { 1037 ptbl_free_pmap_ptbl(pmap, ptbl); 1038 for (j = 0; j < i; j++) 1039 vm_page_free(mtbl[j]); 1040 vm_wire_sub(i); 1041 return (NULL); 1042 } 1043 vm_wait(NULL); 1044 rw_wlock(&pvh_global_lock); 1045 PMAP_LOCK(pmap); 1046 } 1047 mtbl[i] = m; 1048 } 1049 1050 /* Map allocated pages into kernel_pmap. */ 1051 mmu_booke_qenter(mmu, (vm_offset_t)ptbl, mtbl, PTBL_PAGES); 1052 1053 /* Zero whole ptbl. */ 1054 bzero((caddr_t)ptbl, PTBL_PAGES * PAGE_SIZE); 1055 1056 /* Add pbuf to the pmap ptbl bufs list. */ 1057 TAILQ_INSERT_TAIL(&pmap->pm_ptbl_list, pbuf, link); 1058 1059 return (ptbl); 1060 } 1061 1062 /* Free ptbl pages and invalidate pdir entry. */ 1063 static void 1064 ptbl_free(mmu_t mmu, pmap_t pmap, unsigned int pdir_idx) 1065 { 1066 pte_t *ptbl; 1067 vm_paddr_t pa; 1068 vm_offset_t va; 1069 vm_page_t m; 1070 int i; 1071 1072 CTR4(KTR_PMAP, "%s: pmap = %p su = %d pdir_idx = %d", __func__, pmap, 1073 (pmap == kernel_pmap), pdir_idx); 1074 1075 KASSERT((pdir_idx <= (VM_MAXUSER_ADDRESS / PDIR_SIZE)), 1076 ("ptbl_free: invalid pdir_idx")); 1077 1078 ptbl = pmap->pm_pdir[pdir_idx]; 1079 1080 CTR2(KTR_PMAP, "%s: ptbl = %p", __func__, ptbl); 1081 1082 KASSERT((ptbl != NULL), ("ptbl_free: null ptbl")); 1083 1084 /* 1085 * Invalidate the pdir entry as soon as possible, so that other CPUs 1086 * don't attempt to look up the page tables we are releasing. 1087 */ 1088 mtx_lock_spin(&tlbivax_mutex); 1089 tlb_miss_lock(); 1090 1091 pmap->pm_pdir[pdir_idx] = NULL; 1092 1093 tlb_miss_unlock(); 1094 mtx_unlock_spin(&tlbivax_mutex); 1095 1096 for (i = 0; i < PTBL_PAGES; i++) { 1097 va = ((vm_offset_t)ptbl + (i * PAGE_SIZE)); 1098 pa = pte_vatopa(mmu, kernel_pmap, va); 1099 m = PHYS_TO_VM_PAGE(pa); 1100 vm_page_free_zero(m); 1101 vm_wire_sub(1); 1102 mmu_booke_kremove(mmu, va); 1103 } 1104 1105 ptbl_free_pmap_ptbl(pmap, ptbl); 1106 } 1107 1108 /* 1109 * Decrement ptbl pages hold count and attempt to free ptbl pages. 1110 * Called when removing pte entry from ptbl. 1111 * 1112 * Return 1 if ptbl pages were freed. 1113 */ 1114 static int 1115 ptbl_unhold(mmu_t mmu, pmap_t pmap, unsigned int pdir_idx) 1116 { 1117 pte_t *ptbl; 1118 vm_paddr_t pa; 1119 vm_page_t m; 1120 int i; 1121 1122 CTR4(KTR_PMAP, "%s: pmap = %p su = %d pdir_idx = %d", __func__, pmap, 1123 (pmap == kernel_pmap), pdir_idx); 1124 1125 KASSERT((pdir_idx <= (VM_MAXUSER_ADDRESS / PDIR_SIZE)), 1126 ("ptbl_unhold: invalid pdir_idx")); 1127 KASSERT((pmap != kernel_pmap), 1128 ("ptbl_unhold: unholding kernel ptbl!")); 1129 1130 ptbl = pmap->pm_pdir[pdir_idx]; 1131 1132 //debugf("ptbl_unhold: ptbl = 0x%08x\n", (u_int32_t)ptbl); 1133 KASSERT(((vm_offset_t)ptbl >= VM_MIN_KERNEL_ADDRESS), 1134 ("ptbl_unhold: non kva ptbl")); 1135 1136 /* decrement hold count */ 1137 for (i = 0; i < PTBL_PAGES; i++) { 1138 pa = pte_vatopa(mmu, kernel_pmap, 1139 (vm_offset_t)ptbl + (i * PAGE_SIZE)); 1140 m = PHYS_TO_VM_PAGE(pa); 1141 m->wire_count--; 1142 } 1143 1144 /* 1145 * Free ptbl pages if there are no pte etries in this ptbl. 1146 * wire_count has the same value for all ptbl pages, so check the last 1147 * page. 1148 */ 1149 if (m->wire_count == 0) { 1150 ptbl_free(mmu, pmap, pdir_idx); 1151 1152 //debugf("ptbl_unhold: e (freed ptbl)\n"); 1153 return (1); 1154 } 1155 1156 return (0); 1157 } 1158 1159 /* 1160 * Increment hold count for ptbl pages. This routine is used when a new pte 1161 * entry is being inserted into the ptbl. 1162 */ 1163 static void 1164 ptbl_hold(mmu_t mmu, pmap_t pmap, unsigned int pdir_idx) 1165 { 1166 vm_paddr_t pa; 1167 pte_t *ptbl; 1168 vm_page_t m; 1169 int i; 1170 1171 CTR3(KTR_PMAP, "%s: pmap = %p pdir_idx = %d", __func__, pmap, 1172 pdir_idx); 1173 1174 KASSERT((pdir_idx <= (VM_MAXUSER_ADDRESS / PDIR_SIZE)), 1175 ("ptbl_hold: invalid pdir_idx")); 1176 KASSERT((pmap != kernel_pmap), 1177 ("ptbl_hold: holding kernel ptbl!")); 1178 1179 ptbl = pmap->pm_pdir[pdir_idx]; 1180 1181 KASSERT((ptbl != NULL), ("ptbl_hold: null ptbl")); 1182 1183 for (i = 0; i < PTBL_PAGES; i++) { 1184 pa = pte_vatopa(mmu, kernel_pmap, 1185 (vm_offset_t)ptbl + (i * PAGE_SIZE)); 1186 m = PHYS_TO_VM_PAGE(pa); 1187 m->wire_count++; 1188 } 1189 } 1190 #endif 1191 1192 /* Allocate pv_entry structure. */ 1193 pv_entry_t 1194 pv_alloc(void) 1195 { 1196 pv_entry_t pv; 1197 1198 pv_entry_count++; 1199 if (pv_entry_count > pv_entry_high_water) 1200 pagedaemon_wakeup(0); /* XXX powerpc NUMA */ 1201 pv = uma_zalloc(pvzone, M_NOWAIT); 1202 1203 return (pv); 1204 } 1205 1206 /* Free pv_entry structure. */ 1207 static __inline void 1208 pv_free(pv_entry_t pve) 1209 { 1210 1211 pv_entry_count--; 1212 uma_zfree(pvzone, pve); 1213 } 1214 1215 1216 /* Allocate and initialize pv_entry structure. */ 1217 static void 1218 pv_insert(pmap_t pmap, vm_offset_t va, vm_page_t m) 1219 { 1220 pv_entry_t pve; 1221 1222 //int su = (pmap == kernel_pmap); 1223 //debugf("pv_insert: s (su = %d pmap = 0x%08x va = 0x%08x m = 0x%08x)\n", su, 1224 // (u_int32_t)pmap, va, (u_int32_t)m); 1225 1226 pve = pv_alloc(); 1227 if (pve == NULL) 1228 panic("pv_insert: no pv entries!"); 1229 1230 pve->pv_pmap = pmap; 1231 pve->pv_va = va; 1232 1233 /* add to pv_list */ 1234 PMAP_LOCK_ASSERT(pmap, MA_OWNED); 1235 rw_assert(&pvh_global_lock, RA_WLOCKED); 1236 1237 TAILQ_INSERT_TAIL(&m->md.pv_list, pve, pv_link); 1238 1239 //debugf("pv_insert: e\n"); 1240 } 1241 1242 /* Destroy pv entry. */ 1243 static void 1244 pv_remove(pmap_t pmap, vm_offset_t va, vm_page_t m) 1245 { 1246 pv_entry_t pve; 1247 1248 //int su = (pmap == kernel_pmap); 1249 //debugf("pv_remove: s (su = %d pmap = 0x%08x va = 0x%08x)\n", su, (u_int32_t)pmap, va); 1250 1251 PMAP_LOCK_ASSERT(pmap, MA_OWNED); 1252 rw_assert(&pvh_global_lock, RA_WLOCKED); 1253 1254 /* find pv entry */ 1255 TAILQ_FOREACH(pve, &m->md.pv_list, pv_link) { 1256 if ((pmap == pve->pv_pmap) && (va == pve->pv_va)) { 1257 /* remove from pv_list */ 1258 TAILQ_REMOVE(&m->md.pv_list, pve, pv_link); 1259 if (TAILQ_EMPTY(&m->md.pv_list)) 1260 vm_page_aflag_clear(m, PGA_WRITEABLE); 1261 1262 /* free pv entry struct */ 1263 pv_free(pve); 1264 break; 1265 } 1266 } 1267 1268 //debugf("pv_remove: e\n"); 1269 } 1270 1271 #ifdef __powerpc64__ 1272 /* 1273 * Clean pte entry, try to free page table page if requested. 1274 * 1275 * Return 1 if ptbl pages were freed, otherwise return 0. 1276 */ 1277 static int 1278 pte_remove(mmu_t mmu, pmap_t pmap, vm_offset_t va, u_int8_t flags) 1279 { 1280 vm_page_t m; 1281 pte_t *pte; 1282 1283 pte = pte_find(mmu, pmap, va); 1284 KASSERT(pte != NULL, ("%s: NULL pte", __func__)); 1285 1286 if (!PTE_ISVALID(pte)) 1287 return (0); 1288 1289 /* Get vm_page_t for mapped pte. */ 1290 m = PHYS_TO_VM_PAGE(PTE_PA(pte)); 1291 1292 if (PTE_ISWIRED(pte)) 1293 pmap->pm_stats.wired_count--; 1294 1295 /* Handle managed entry. */ 1296 if (PTE_ISMANAGED(pte)) { 1297 1298 /* Handle modified pages. */ 1299 if (PTE_ISMODIFIED(pte)) 1300 vm_page_dirty(m); 1301 1302 /* Referenced pages. */ 1303 if (PTE_ISREFERENCED(pte)) 1304 vm_page_aflag_set(m, PGA_REFERENCED); 1305 1306 /* Remove pv_entry from pv_list. */ 1307 pv_remove(pmap, va, m); 1308 } else if (m->md.pv_tracked) { 1309 pv_remove(pmap, va, m); 1310 if (TAILQ_EMPTY(&m->md.pv_list)) 1311 m->md.pv_tracked = false; 1312 } 1313 mtx_lock_spin(&tlbivax_mutex); 1314 tlb_miss_lock(); 1315 1316 tlb0_flush_entry(va); 1317 *pte = 0; 1318 1319 tlb_miss_unlock(); 1320 mtx_unlock_spin(&tlbivax_mutex); 1321 1322 pmap->pm_stats.resident_count--; 1323 1324 if (flags & PTBL_UNHOLD) { 1325 return (ptbl_unhold(mmu, pmap, va)); 1326 } 1327 return (0); 1328 } 1329 1330 /* 1331 * allocate a page of pointers to page directories, do not preallocate the 1332 * page tables 1333 */ 1334 static pte_t ** 1335 pdir_alloc(mmu_t mmu, pmap_t pmap, unsigned int pp2d_idx, bool nosleep) 1336 { 1337 vm_page_t mtbl [PDIR_PAGES]; 1338 vm_page_t m; 1339 struct ptbl_buf *pbuf; 1340 pte_t **pdir; 1341 unsigned int pidx; 1342 int i; 1343 int req; 1344 1345 pbuf = ptbl_buf_alloc(); 1346 1347 if (pbuf == NULL) 1348 panic("%s: couldn't alloc kernel virtual memory", __func__); 1349 1350 /* Allocate pdir pages, this will sleep! */ 1351 for (i = 0; i < PDIR_PAGES; i++) { 1352 pidx = (PDIR_PAGES * pp2d_idx) + i; 1353 req = VM_ALLOC_NOOBJ | VM_ALLOC_WIRED; 1354 while ((m = vm_page_alloc(NULL, pidx, req)) == NULL) { 1355 PMAP_UNLOCK(pmap); 1356 vm_wait(NULL); 1357 PMAP_LOCK(pmap); 1358 } 1359 mtbl[i] = m; 1360 } 1361 1362 /* Mapin allocated pages into kernel_pmap. */ 1363 pdir = (pte_t **) pbuf->kva; 1364 pmap_qenter((vm_offset_t) pdir, mtbl, PDIR_PAGES); 1365 1366 /* Zero whole pdir. */ 1367 bzero((caddr_t) pdir, PDIR_PAGES * PAGE_SIZE); 1368 1369 /* Add pdir to the pmap pdir bufs list. */ 1370 TAILQ_INSERT_TAIL(&pmap->pm_pdir_list, pbuf, link); 1371 1372 return pdir; 1373 } 1374 1375 /* 1376 * Insert PTE for a given page and virtual address. 1377 */ 1378 static int 1379 pte_enter(mmu_t mmu, pmap_t pmap, vm_page_t m, vm_offset_t va, uint32_t flags, 1380 boolean_t nosleep) 1381 { 1382 unsigned int pp2d_idx = PP2D_IDX(va); 1383 unsigned int pdir_idx = PDIR_IDX(va); 1384 unsigned int ptbl_idx = PTBL_IDX(va); 1385 pte_t *ptbl, *pte; 1386 pte_t **pdir; 1387 1388 /* Get the page directory pointer. */ 1389 pdir = pmap->pm_pp2d[pp2d_idx]; 1390 if (pdir == NULL) 1391 pdir = pdir_alloc(mmu, pmap, pp2d_idx, nosleep); 1392 1393 /* Get the page table pointer. */ 1394 ptbl = pdir[pdir_idx]; 1395 1396 if (ptbl == NULL) { 1397 /* Allocate page table pages. */ 1398 ptbl = ptbl_alloc(mmu, pmap, pdir, pdir_idx, nosleep); 1399 if (ptbl == NULL) { 1400 KASSERT(nosleep, ("nosleep and NULL ptbl")); 1401 return (ENOMEM); 1402 } 1403 } else { 1404 /* 1405 * Check if there is valid mapping for requested va, if there 1406 * is, remove it. 1407 */ 1408 pte = &pdir[pdir_idx][ptbl_idx]; 1409 if (PTE_ISVALID(pte)) { 1410 pte_remove(mmu, pmap, va, PTBL_HOLD); 1411 } else { 1412 /* 1413 * pte is not used, increment hold count for ptbl 1414 * pages. 1415 */ 1416 if (pmap != kernel_pmap) 1417 ptbl_hold(mmu, pmap, pdir, pdir_idx); 1418 } 1419 } 1420 1421 if (pdir[pdir_idx] == NULL) { 1422 if (pmap != kernel_pmap && pmap->pm_pp2d[pp2d_idx] != NULL) 1423 pdir_hold(mmu, pmap, pdir); 1424 pdir[pdir_idx] = ptbl; 1425 } 1426 if (pmap->pm_pp2d[pp2d_idx] == NULL) 1427 pmap->pm_pp2d[pp2d_idx] = pdir; 1428 1429 /* 1430 * Insert pv_entry into pv_list for mapped page if part of managed 1431 * memory. 1432 */ 1433 if ((m->oflags & VPO_UNMANAGED) == 0) { 1434 flags |= PTE_MANAGED; 1435 1436 /* Create and insert pv entry. */ 1437 pv_insert(pmap, va, m); 1438 } 1439 1440 mtx_lock_spin(&tlbivax_mutex); 1441 tlb_miss_lock(); 1442 1443 tlb0_flush_entry(va); 1444 pmap->pm_stats.resident_count++; 1445 pte = &pdir[pdir_idx][ptbl_idx]; 1446 *pte = PTE_RPN_FROM_PA(VM_PAGE_TO_PHYS(m)); 1447 *pte |= (PTE_VALID | flags); 1448 1449 tlb_miss_unlock(); 1450 mtx_unlock_spin(&tlbivax_mutex); 1451 1452 return (0); 1453 } 1454 1455 /* Return the pa for the given pmap/va. */ 1456 static vm_paddr_t 1457 pte_vatopa(mmu_t mmu, pmap_t pmap, vm_offset_t va) 1458 { 1459 vm_paddr_t pa = 0; 1460 pte_t *pte; 1461 1462 pte = pte_find(mmu, pmap, va); 1463 if ((pte != NULL) && PTE_ISVALID(pte)) 1464 pa = (PTE_PA(pte) | (va & PTE_PA_MASK)); 1465 return (pa); 1466 } 1467 1468 1469 /* allocate pte entries to manage (addr & mask) to (addr & mask) + size */ 1470 static void 1471 kernel_pte_alloc(vm_offset_t data_end, vm_offset_t addr, vm_offset_t pdir) 1472 { 1473 int i, j; 1474 vm_offset_t va; 1475 pte_t *pte; 1476 1477 va = addr; 1478 /* Initialize kernel pdir */ 1479 for (i = 0; i < kernel_pdirs; i++) { 1480 kernel_pmap->pm_pp2d[i + PP2D_IDX(va)] = 1481 (pte_t **)(pdir + (i * PAGE_SIZE * PDIR_PAGES)); 1482 for (j = PDIR_IDX(va + (i * PAGE_SIZE * PDIR_NENTRIES * PTBL_NENTRIES)); 1483 j < PDIR_NENTRIES; j++) { 1484 kernel_pmap->pm_pp2d[i + PP2D_IDX(va)][j] = 1485 (pte_t *)(pdir + (kernel_pdirs * PAGE_SIZE * PDIR_PAGES) + 1486 (((i * PDIR_NENTRIES) + j) * PAGE_SIZE * PTBL_PAGES)); 1487 } 1488 } 1489 1490 /* 1491 * Fill in PTEs covering kernel code and data. They are not required 1492 * for address translation, as this area is covered by static TLB1 1493 * entries, but for pte_vatopa() to work correctly with kernel area 1494 * addresses. 1495 */ 1496 for (va = addr; va < data_end; va += PAGE_SIZE) { 1497 pte = &(kernel_pmap->pm_pp2d[PP2D_IDX(va)][PDIR_IDX(va)][PTBL_IDX(va)]); 1498 *pte = PTE_RPN_FROM_PA(kernload + (va - kernstart)); 1499 *pte |= PTE_M | PTE_SR | PTE_SW | PTE_SX | PTE_WIRED | 1500 PTE_VALID | PTE_PS_4KB; 1501 } 1502 } 1503 #else 1504 /* 1505 * Clean pte entry, try to free page table page if requested. 1506 * 1507 * Return 1 if ptbl pages were freed, otherwise return 0. 1508 */ 1509 static int 1510 pte_remove(mmu_t mmu, pmap_t pmap, vm_offset_t va, uint8_t flags) 1511 { 1512 unsigned int pdir_idx = PDIR_IDX(va); 1513 unsigned int ptbl_idx = PTBL_IDX(va); 1514 vm_page_t m; 1515 pte_t *ptbl; 1516 pte_t *pte; 1517 1518 //int su = (pmap == kernel_pmap); 1519 //debugf("pte_remove: s (su = %d pmap = 0x%08x va = 0x%08x flags = %d)\n", 1520 // su, (u_int32_t)pmap, va, flags); 1521 1522 ptbl = pmap->pm_pdir[pdir_idx]; 1523 KASSERT(ptbl, ("pte_remove: null ptbl")); 1524 1525 pte = &ptbl[ptbl_idx]; 1526 1527 if (pte == NULL || !PTE_ISVALID(pte)) 1528 return (0); 1529 1530 if (PTE_ISWIRED(pte)) 1531 pmap->pm_stats.wired_count--; 1532 1533 /* Get vm_page_t for mapped pte. */ 1534 m = PHYS_TO_VM_PAGE(PTE_PA(pte)); 1535 1536 /* Handle managed entry. */ 1537 if (PTE_ISMANAGED(pte)) { 1538 1539 if (PTE_ISMODIFIED(pte)) 1540 vm_page_dirty(m); 1541 1542 if (PTE_ISREFERENCED(pte)) 1543 vm_page_aflag_set(m, PGA_REFERENCED); 1544 1545 pv_remove(pmap, va, m); 1546 } else if (m->md.pv_tracked) { 1547 /* 1548 * Always pv_insert()/pv_remove() on MPC85XX, in case DPAA is 1549 * used. This is needed by the NCSW support code for fast 1550 * VA<->PA translation. 1551 */ 1552 pv_remove(pmap, va, m); 1553 if (TAILQ_EMPTY(&m->md.pv_list)) 1554 m->md.pv_tracked = false; 1555 } 1556 1557 mtx_lock_spin(&tlbivax_mutex); 1558 tlb_miss_lock(); 1559 1560 tlb0_flush_entry(va); 1561 *pte = 0; 1562 1563 tlb_miss_unlock(); 1564 mtx_unlock_spin(&tlbivax_mutex); 1565 1566 pmap->pm_stats.resident_count--; 1567 1568 if (flags & PTBL_UNHOLD) { 1569 //debugf("pte_remove: e (unhold)\n"); 1570 return (ptbl_unhold(mmu, pmap, pdir_idx)); 1571 } 1572 1573 //debugf("pte_remove: e\n"); 1574 return (0); 1575 } 1576 1577 /* 1578 * Insert PTE for a given page and virtual address. 1579 */ 1580 static int 1581 pte_enter(mmu_t mmu, pmap_t pmap, vm_page_t m, vm_offset_t va, uint32_t flags, 1582 boolean_t nosleep) 1583 { 1584 unsigned int pdir_idx = PDIR_IDX(va); 1585 unsigned int ptbl_idx = PTBL_IDX(va); 1586 pte_t *ptbl, *pte; 1587 1588 CTR4(KTR_PMAP, "%s: su = %d pmap = %p va = %p", __func__, 1589 pmap == kernel_pmap, pmap, va); 1590 1591 /* Get the page table pointer. */ 1592 ptbl = pmap->pm_pdir[pdir_idx]; 1593 1594 if (ptbl == NULL) { 1595 /* Allocate page table pages. */ 1596 ptbl = ptbl_alloc(mmu, pmap, pdir_idx, nosleep); 1597 if (ptbl == NULL) { 1598 KASSERT(nosleep, ("nosleep and NULL ptbl")); 1599 return (ENOMEM); 1600 } 1601 } else { 1602 /* 1603 * Check if there is valid mapping for requested 1604 * va, if there is, remove it. 1605 */ 1606 pte = &pmap->pm_pdir[pdir_idx][ptbl_idx]; 1607 if (PTE_ISVALID(pte)) { 1608 pte_remove(mmu, pmap, va, PTBL_HOLD); 1609 } else { 1610 /* 1611 * pte is not used, increment hold count 1612 * for ptbl pages. 1613 */ 1614 if (pmap != kernel_pmap) 1615 ptbl_hold(mmu, pmap, pdir_idx); 1616 } 1617 } 1618 1619 /* 1620 * Insert pv_entry into pv_list for mapped page if part of managed 1621 * memory. 1622 */ 1623 if ((m->oflags & VPO_UNMANAGED) == 0) { 1624 flags |= PTE_MANAGED; 1625 1626 /* Create and insert pv entry. */ 1627 pv_insert(pmap, va, m); 1628 } 1629 1630 pmap->pm_stats.resident_count++; 1631 1632 mtx_lock_spin(&tlbivax_mutex); 1633 tlb_miss_lock(); 1634 1635 tlb0_flush_entry(va); 1636 if (pmap->pm_pdir[pdir_idx] == NULL) { 1637 /* 1638 * If we just allocated a new page table, hook it in 1639 * the pdir. 1640 */ 1641 pmap->pm_pdir[pdir_idx] = ptbl; 1642 } 1643 pte = &(pmap->pm_pdir[pdir_idx][ptbl_idx]); 1644 *pte = PTE_RPN_FROM_PA(VM_PAGE_TO_PHYS(m)); 1645 *pte |= (PTE_VALID | flags | PTE_PS_4KB); /* 4KB pages only */ 1646 1647 tlb_miss_unlock(); 1648 mtx_unlock_spin(&tlbivax_mutex); 1649 return (0); 1650 } 1651 1652 /* Return the pa for the given pmap/va. */ 1653 static vm_paddr_t 1654 pte_vatopa(mmu_t mmu, pmap_t pmap, vm_offset_t va) 1655 { 1656 vm_paddr_t pa = 0; 1657 pte_t *pte; 1658 1659 pte = pte_find(mmu, pmap, va); 1660 if ((pte != NULL) && PTE_ISVALID(pte)) 1661 pa = (PTE_PA(pte) | (va & PTE_PA_MASK)); 1662 return (pa); 1663 } 1664 1665 /* Get a pointer to a PTE in a page table. */ 1666 static pte_t * 1667 pte_find(mmu_t mmu, pmap_t pmap, vm_offset_t va) 1668 { 1669 unsigned int pdir_idx = PDIR_IDX(va); 1670 unsigned int ptbl_idx = PTBL_IDX(va); 1671 1672 KASSERT((pmap != NULL), ("pte_find: invalid pmap")); 1673 1674 if (pmap->pm_pdir[pdir_idx]) 1675 return (&(pmap->pm_pdir[pdir_idx][ptbl_idx])); 1676 1677 return (NULL); 1678 } 1679 1680 /* Set up kernel page tables. */ 1681 static void 1682 kernel_pte_alloc(vm_offset_t data_end, vm_offset_t addr, vm_offset_t pdir) 1683 { 1684 int i; 1685 vm_offset_t va; 1686 pte_t *pte; 1687 1688 /* Initialize kernel pdir */ 1689 for (i = 0; i < kernel_ptbls; i++) 1690 kernel_pmap->pm_pdir[kptbl_min + i] = 1691 (pte_t *)(pdir + (i * PAGE_SIZE * PTBL_PAGES)); 1692 1693 /* 1694 * Fill in PTEs covering kernel code and data. They are not required 1695 * for address translation, as this area is covered by static TLB1 1696 * entries, but for pte_vatopa() to work correctly with kernel area 1697 * addresses. 1698 */ 1699 for (va = addr; va < data_end; va += PAGE_SIZE) { 1700 pte = &(kernel_pmap->pm_pdir[PDIR_IDX(va)][PTBL_IDX(va)]); 1701 *pte = PTE_RPN_FROM_PA(kernload + (va - kernstart)); 1702 *pte |= PTE_M | PTE_SR | PTE_SW | PTE_SX | PTE_WIRED | 1703 PTE_VALID | PTE_PS_4KB; 1704 } 1705 } 1706 #endif 1707 1708 /**************************************************************************/ 1709 /* PMAP related */ 1710 /**************************************************************************/ 1711 1712 /* 1713 * This is called during booke_init, before the system is really initialized. 1714 */ 1715 static void 1716 mmu_booke_bootstrap(mmu_t mmu, vm_offset_t start, vm_offset_t kernelend) 1717 { 1718 vm_paddr_t phys_kernelend; 1719 struct mem_region *mp, *mp1; 1720 int cnt, i, j; 1721 vm_paddr_t s, e, sz; 1722 vm_paddr_t physsz, hwphyssz; 1723 u_int phys_avail_count; 1724 vm_size_t kstack0_sz; 1725 vm_offset_t kernel_pdir, kstack0; 1726 vm_paddr_t kstack0_phys; 1727 void *dpcpu; 1728 1729 debugf("mmu_booke_bootstrap: entered\n"); 1730 1731 /* Set interesting system properties */ 1732 #ifdef __powerpc64__ 1733 hw_direct_map = 1; 1734 #else 1735 hw_direct_map = 0; 1736 #endif 1737 #if defined(COMPAT_FREEBSD32) || !defined(__powerpc64__) 1738 elf32_nxstack = 1; 1739 #endif 1740 1741 /* Initialize invalidation mutex */ 1742 mtx_init(&tlbivax_mutex, "tlbivax", NULL, MTX_SPIN); 1743 1744 /* Read TLB0 size and associativity. */ 1745 tlb0_get_tlbconf(); 1746 1747 /* 1748 * Align kernel start and end address (kernel image). 1749 * Note that kernel end does not necessarily relate to kernsize. 1750 * kernsize is the size of the kernel that is actually mapped. 1751 */ 1752 kernstart = trunc_page(start); 1753 data_start = round_page(kernelend); 1754 data_end = data_start; 1755 1756 /* Allocate the dynamic per-cpu area. */ 1757 dpcpu = (void *)data_end; 1758 data_end += DPCPU_SIZE; 1759 1760 /* Allocate space for the message buffer. */ 1761 msgbufp = (struct msgbuf *)data_end; 1762 data_end += msgbufsize; 1763 debugf(" msgbufp at 0x%"PRI0ptrX" end = 0x%"PRI0ptrX"\n", 1764 (uintptr_t)msgbufp, data_end); 1765 1766 data_end = round_page(data_end); 1767 1768 /* Allocate space for ptbl_bufs. */ 1769 ptbl_bufs = (struct ptbl_buf *)data_end; 1770 data_end += sizeof(struct ptbl_buf) * PTBL_BUFS; 1771 debugf(" ptbl_bufs at 0x%"PRI0ptrX" end = 0x%"PRI0ptrX"\n", 1772 (uintptr_t)ptbl_bufs, data_end); 1773 1774 data_end = round_page(data_end); 1775 1776 /* Allocate PTE tables for kernel KVA. */ 1777 kernel_pdir = data_end; 1778 kernel_ptbls = howmany(VM_MAX_KERNEL_ADDRESS - VM_MIN_KERNEL_ADDRESS, 1779 PDIR_SIZE); 1780 #ifdef __powerpc64__ 1781 kernel_pdirs = howmany(kernel_ptbls, PDIR_NENTRIES); 1782 data_end += kernel_pdirs * PDIR_PAGES * PAGE_SIZE; 1783 #endif 1784 data_end += kernel_ptbls * PTBL_PAGES * PAGE_SIZE; 1785 debugf(" kernel ptbls: %d\n", kernel_ptbls); 1786 debugf(" kernel pdir at 0x%"PRI0ptrX" end = 0x%"PRI0ptrX"\n", 1787 kernel_pdir, data_end); 1788 1789 debugf(" data_end: 0x%"PRI0ptrX"\n", data_end); 1790 if (data_end - kernstart > kernsize) { 1791 kernsize += tlb1_mapin_region(kernstart + kernsize, 1792 kernload + kernsize, (data_end - kernstart) - kernsize); 1793 } 1794 data_end = kernstart + kernsize; 1795 debugf(" updated data_end: 0x%"PRI0ptrX"\n", data_end); 1796 1797 /* 1798 * Clear the structures - note we can only do it safely after the 1799 * possible additional TLB1 translations are in place (above) so that 1800 * all range up to the currently calculated 'data_end' is covered. 1801 */ 1802 dpcpu_init(dpcpu, 0); 1803 memset((void *)ptbl_bufs, 0, sizeof(struct ptbl_buf) * PTBL_SIZE); 1804 #ifdef __powerpc64__ 1805 memset((void *)kernel_pdir, 0, 1806 kernel_pdirs * PDIR_PAGES * PAGE_SIZE + 1807 kernel_ptbls * PTBL_PAGES * PAGE_SIZE); 1808 #else 1809 memset((void *)kernel_pdir, 0, kernel_ptbls * PTBL_PAGES * PAGE_SIZE); 1810 #endif 1811 1812 /*******************************************************/ 1813 /* Set the start and end of kva. */ 1814 /*******************************************************/ 1815 virtual_avail = round_page(data_end); 1816 virtual_end = VM_MAX_KERNEL_ADDRESS; 1817 1818 /* Allocate KVA space for page zero/copy operations. */ 1819 zero_page_va = virtual_avail; 1820 virtual_avail += PAGE_SIZE; 1821 copy_page_src_va = virtual_avail; 1822 virtual_avail += PAGE_SIZE; 1823 copy_page_dst_va = virtual_avail; 1824 virtual_avail += PAGE_SIZE; 1825 debugf("zero_page_va = 0x%"PRI0ptrX"\n", zero_page_va); 1826 debugf("copy_page_src_va = 0x%"PRI0ptrX"\n", copy_page_src_va); 1827 debugf("copy_page_dst_va = 0x%"PRI0ptrX"\n", copy_page_dst_va); 1828 1829 /* Initialize page zero/copy mutexes. */ 1830 mtx_init(&zero_page_mutex, "mmu_booke_zero_page", NULL, MTX_DEF); 1831 mtx_init(©_page_mutex, "mmu_booke_copy_page", NULL, MTX_DEF); 1832 1833 /* Allocate KVA space for ptbl bufs. */ 1834 ptbl_buf_pool_vabase = virtual_avail; 1835 virtual_avail += PTBL_BUFS * PTBL_PAGES * PAGE_SIZE; 1836 debugf("ptbl_buf_pool_vabase = 0x%"PRI0ptrX" end = 0x%"PRI0ptrX"\n", 1837 ptbl_buf_pool_vabase, virtual_avail); 1838 1839 /* Calculate corresponding physical addresses for the kernel region. */ 1840 phys_kernelend = kernload + kernsize; 1841 debugf("kernel image and allocated data:\n"); 1842 debugf(" kernload = 0x%09llx\n", (uint64_t)kernload); 1843 debugf(" kernstart = 0x%"PRI0ptrX"\n", kernstart); 1844 debugf(" kernsize = 0x%"PRI0ptrX"\n", kernsize); 1845 1846 if (sizeof(phys_avail) / sizeof(phys_avail[0]) < availmem_regions_sz) 1847 panic("mmu_booke_bootstrap: phys_avail too small"); 1848 1849 /* 1850 * Remove kernel physical address range from avail regions list. Page 1851 * align all regions. Non-page aligned memory isn't very interesting 1852 * to us. Also, sort the entries for ascending addresses. 1853 */ 1854 1855 /* Retrieve phys/avail mem regions */ 1856 mem_regions(&physmem_regions, &physmem_regions_sz, 1857 &availmem_regions, &availmem_regions_sz); 1858 sz = 0; 1859 cnt = availmem_regions_sz; 1860 debugf("processing avail regions:\n"); 1861 for (mp = availmem_regions; mp->mr_size; mp++) { 1862 s = mp->mr_start; 1863 e = mp->mr_start + mp->mr_size; 1864 debugf(" %09jx-%09jx -> ", (uintmax_t)s, (uintmax_t)e); 1865 /* Check whether this region holds all of the kernel. */ 1866 if (s < kernload && e > phys_kernelend) { 1867 availmem_regions[cnt].mr_start = phys_kernelend; 1868 availmem_regions[cnt++].mr_size = e - phys_kernelend; 1869 e = kernload; 1870 } 1871 /* Look whether this regions starts within the kernel. */ 1872 if (s >= kernload && s < phys_kernelend) { 1873 if (e <= phys_kernelend) 1874 goto empty; 1875 s = phys_kernelend; 1876 } 1877 /* Now look whether this region ends within the kernel. */ 1878 if (e > kernload && e <= phys_kernelend) { 1879 if (s >= kernload) 1880 goto empty; 1881 e = kernload; 1882 } 1883 /* Now page align the start and size of the region. */ 1884 s = round_page(s); 1885 e = trunc_page(e); 1886 if (e < s) 1887 e = s; 1888 sz = e - s; 1889 debugf("%09jx-%09jx = %jx\n", 1890 (uintmax_t)s, (uintmax_t)e, (uintmax_t)sz); 1891 1892 /* Check whether some memory is left here. */ 1893 if (sz == 0) { 1894 empty: 1895 memmove(mp, mp + 1, 1896 (cnt - (mp - availmem_regions)) * sizeof(*mp)); 1897 cnt--; 1898 mp--; 1899 continue; 1900 } 1901 1902 /* Do an insertion sort. */ 1903 for (mp1 = availmem_regions; mp1 < mp; mp1++) 1904 if (s < mp1->mr_start) 1905 break; 1906 if (mp1 < mp) { 1907 memmove(mp1 + 1, mp1, (char *)mp - (char *)mp1); 1908 mp1->mr_start = s; 1909 mp1->mr_size = sz; 1910 } else { 1911 mp->mr_start = s; 1912 mp->mr_size = sz; 1913 } 1914 } 1915 availmem_regions_sz = cnt; 1916 1917 /*******************************************************/ 1918 /* Steal physical memory for kernel stack from the end */ 1919 /* of the first avail region */ 1920 /*******************************************************/ 1921 kstack0_sz = kstack_pages * PAGE_SIZE; 1922 kstack0_phys = availmem_regions[0].mr_start + 1923 availmem_regions[0].mr_size; 1924 kstack0_phys -= kstack0_sz; 1925 availmem_regions[0].mr_size -= kstack0_sz; 1926 1927 /*******************************************************/ 1928 /* Fill in phys_avail table, based on availmem_regions */ 1929 /*******************************************************/ 1930 phys_avail_count = 0; 1931 physsz = 0; 1932 hwphyssz = 0; 1933 TUNABLE_ULONG_FETCH("hw.physmem", (u_long *) &hwphyssz); 1934 1935 debugf("fill in phys_avail:\n"); 1936 for (i = 0, j = 0; i < availmem_regions_sz; i++, j += 2) { 1937 1938 debugf(" region: 0x%jx - 0x%jx (0x%jx)\n", 1939 (uintmax_t)availmem_regions[i].mr_start, 1940 (uintmax_t)availmem_regions[i].mr_start + 1941 availmem_regions[i].mr_size, 1942 (uintmax_t)availmem_regions[i].mr_size); 1943 1944 if (hwphyssz != 0 && 1945 (physsz + availmem_regions[i].mr_size) >= hwphyssz) { 1946 debugf(" hw.physmem adjust\n"); 1947 if (physsz < hwphyssz) { 1948 phys_avail[j] = availmem_regions[i].mr_start; 1949 phys_avail[j + 1] = 1950 availmem_regions[i].mr_start + 1951 hwphyssz - physsz; 1952 physsz = hwphyssz; 1953 phys_avail_count++; 1954 } 1955 break; 1956 } 1957 1958 phys_avail[j] = availmem_regions[i].mr_start; 1959 phys_avail[j + 1] = availmem_regions[i].mr_start + 1960 availmem_regions[i].mr_size; 1961 phys_avail_count++; 1962 physsz += availmem_regions[i].mr_size; 1963 } 1964 physmem = btoc(physsz); 1965 1966 /* Calculate the last available physical address. */ 1967 for (i = 0; phys_avail[i + 2] != 0; i += 2) 1968 ; 1969 Maxmem = powerpc_btop(phys_avail[i + 1]); 1970 1971 debugf("Maxmem = 0x%08lx\n", Maxmem); 1972 debugf("phys_avail_count = %d\n", phys_avail_count); 1973 debugf("physsz = 0x%09jx physmem = %jd (0x%09jx)\n", 1974 (uintmax_t)physsz, (uintmax_t)physmem, (uintmax_t)physmem); 1975 1976 #ifdef __powerpc64__ 1977 /* 1978 * Map the physical memory contiguously in TLB1. 1979 * Round so it fits into a single mapping. 1980 */ 1981 tlb1_mapin_region(DMAP_BASE_ADDRESS, 0, 1982 phys_avail[i + 1]); 1983 #endif 1984 1985 /*******************************************************/ 1986 /* Initialize (statically allocated) kernel pmap. */ 1987 /*******************************************************/ 1988 PMAP_LOCK_INIT(kernel_pmap); 1989 #ifndef __powerpc64__ 1990 kptbl_min = VM_MIN_KERNEL_ADDRESS / PDIR_SIZE; 1991 #endif 1992 1993 debugf("kernel_pmap = 0x%"PRI0ptrX"\n", (uintptr_t)kernel_pmap); 1994 kernel_pte_alloc(virtual_avail, kernstart, kernel_pdir); 1995 for (i = 0; i < MAXCPU; i++) { 1996 kernel_pmap->pm_tid[i] = TID_KERNEL; 1997 1998 /* Initialize each CPU's tidbusy entry 0 with kernel_pmap */ 1999 tidbusy[i][TID_KERNEL] = kernel_pmap; 2000 } 2001 2002 /* Mark kernel_pmap active on all CPUs */ 2003 CPU_FILL(&kernel_pmap->pm_active); 2004 2005 /* 2006 * Initialize the global pv list lock. 2007 */ 2008 rw_init(&pvh_global_lock, "pmap pv global"); 2009 2010 /*******************************************************/ 2011 /* Final setup */ 2012 /*******************************************************/ 2013 2014 /* Enter kstack0 into kernel map, provide guard page */ 2015 kstack0 = virtual_avail + KSTACK_GUARD_PAGES * PAGE_SIZE; 2016 thread0.td_kstack = kstack0; 2017 thread0.td_kstack_pages = kstack_pages; 2018 2019 debugf("kstack_sz = 0x%08x\n", kstack0_sz); 2020 debugf("kstack0_phys at 0x%09llx - 0x%09llx\n", 2021 kstack0_phys, kstack0_phys + kstack0_sz); 2022 debugf("kstack0 at 0x%"PRI0ptrX" - 0x%"PRI0ptrX"\n", 2023 kstack0, kstack0 + kstack0_sz); 2024 2025 virtual_avail += KSTACK_GUARD_PAGES * PAGE_SIZE + kstack0_sz; 2026 for (i = 0; i < kstack_pages; i++) { 2027 mmu_booke_kenter(mmu, kstack0, kstack0_phys); 2028 kstack0 += PAGE_SIZE; 2029 kstack0_phys += PAGE_SIZE; 2030 } 2031 2032 pmap_bootstrapped = 1; 2033 2034 debugf("virtual_avail = %"PRI0ptrX"\n", virtual_avail); 2035 debugf("virtual_end = %"PRI0ptrX"\n", virtual_end); 2036 2037 debugf("mmu_booke_bootstrap: exit\n"); 2038 } 2039 2040 #ifdef SMP 2041 void 2042 tlb1_ap_prep(void) 2043 { 2044 tlb_entry_t *e, tmp; 2045 unsigned int i; 2046 2047 /* Prepare TLB1 image for AP processors */ 2048 e = __boot_tlb1; 2049 for (i = 0; i < TLB1_ENTRIES; i++) { 2050 tlb1_read_entry(&tmp, i); 2051 2052 if ((tmp.mas1 & MAS1_VALID) && (tmp.mas2 & _TLB_ENTRY_SHARED)) 2053 memcpy(e++, &tmp, sizeof(tmp)); 2054 } 2055 } 2056 2057 void 2058 pmap_bootstrap_ap(volatile uint32_t *trcp __unused) 2059 { 2060 int i; 2061 2062 /* 2063 * Finish TLB1 configuration: the BSP already set up its TLB1 and we 2064 * have the snapshot of its contents in the s/w __boot_tlb1[] table 2065 * created by tlb1_ap_prep(), so use these values directly to 2066 * (re)program AP's TLB1 hardware. 2067 * 2068 * Start at index 1 because index 0 has the kernel map. 2069 */ 2070 for (i = 1; i < TLB1_ENTRIES; i++) { 2071 if (__boot_tlb1[i].mas1 & MAS1_VALID) 2072 tlb1_write_entry(&__boot_tlb1[i], i); 2073 } 2074 2075 set_mas4_defaults(); 2076 } 2077 #endif 2078 2079 static void 2080 booke_pmap_init_qpages(void) 2081 { 2082 struct pcpu *pc; 2083 int i; 2084 2085 CPU_FOREACH(i) { 2086 pc = pcpu_find(i); 2087 pc->pc_qmap_addr = kva_alloc(PAGE_SIZE); 2088 if (pc->pc_qmap_addr == 0) 2089 panic("pmap_init_qpages: unable to allocate KVA"); 2090 } 2091 } 2092 2093 SYSINIT(qpages_init, SI_SUB_CPU, SI_ORDER_ANY, booke_pmap_init_qpages, NULL); 2094 2095 /* 2096 * Get the physical page address for the given pmap/virtual address. 2097 */ 2098 static vm_paddr_t 2099 mmu_booke_extract(mmu_t mmu, pmap_t pmap, vm_offset_t va) 2100 { 2101 vm_paddr_t pa; 2102 2103 PMAP_LOCK(pmap); 2104 pa = pte_vatopa(mmu, pmap, va); 2105 PMAP_UNLOCK(pmap); 2106 2107 return (pa); 2108 } 2109 2110 /* 2111 * Extract the physical page address associated with the given 2112 * kernel virtual address. 2113 */ 2114 static vm_paddr_t 2115 mmu_booke_kextract(mmu_t mmu, vm_offset_t va) 2116 { 2117 tlb_entry_t e; 2118 vm_paddr_t p = 0; 2119 int i; 2120 2121 if (va >= VM_MIN_KERNEL_ADDRESS && va <= VM_MAX_KERNEL_ADDRESS) 2122 p = pte_vatopa(mmu, kernel_pmap, va); 2123 2124 if (p == 0) { 2125 /* Check TLB1 mappings */ 2126 for (i = 0; i < TLB1_ENTRIES; i++) { 2127 tlb1_read_entry(&e, i); 2128 if (!(e.mas1 & MAS1_VALID)) 2129 continue; 2130 if (va >= e.virt && va < e.virt + e.size) 2131 return (e.phys + (va - e.virt)); 2132 } 2133 } 2134 2135 return (p); 2136 } 2137 2138 /* 2139 * Initialize the pmap module. 2140 * Called by vm_init, to initialize any structures that the pmap 2141 * system needs to map virtual memory. 2142 */ 2143 static void 2144 mmu_booke_init(mmu_t mmu) 2145 { 2146 int shpgperproc = PMAP_SHPGPERPROC; 2147 2148 /* 2149 * Initialize the address space (zone) for the pv entries. Set a 2150 * high water mark so that the system can recover from excessive 2151 * numbers of pv entries. 2152 */ 2153 pvzone = uma_zcreate("PV ENTRY", sizeof(struct pv_entry), NULL, NULL, 2154 NULL, NULL, UMA_ALIGN_PTR, UMA_ZONE_VM | UMA_ZONE_NOFREE); 2155 2156 TUNABLE_INT_FETCH("vm.pmap.shpgperproc", &shpgperproc); 2157 pv_entry_max = shpgperproc * maxproc + vm_cnt.v_page_count; 2158 2159 TUNABLE_INT_FETCH("vm.pmap.pv_entries", &pv_entry_max); 2160 pv_entry_high_water = 9 * (pv_entry_max / 10); 2161 2162 uma_zone_reserve_kva(pvzone, pv_entry_max); 2163 2164 /* Pre-fill pvzone with initial number of pv entries. */ 2165 uma_prealloc(pvzone, PV_ENTRY_ZONE_MIN); 2166 2167 /* Initialize ptbl allocation. */ 2168 ptbl_init(); 2169 } 2170 2171 /* 2172 * Map a list of wired pages into kernel virtual address space. This is 2173 * intended for temporary mappings which do not need page modification or 2174 * references recorded. Existing mappings in the region are overwritten. 2175 */ 2176 static void 2177 mmu_booke_qenter(mmu_t mmu, vm_offset_t sva, vm_page_t *m, int count) 2178 { 2179 vm_offset_t va; 2180 2181 va = sva; 2182 while (count-- > 0) { 2183 mmu_booke_kenter(mmu, va, VM_PAGE_TO_PHYS(*m)); 2184 va += PAGE_SIZE; 2185 m++; 2186 } 2187 } 2188 2189 /* 2190 * Remove page mappings from kernel virtual address space. Intended for 2191 * temporary mappings entered by mmu_booke_qenter. 2192 */ 2193 static void 2194 mmu_booke_qremove(mmu_t mmu, vm_offset_t sva, int count) 2195 { 2196 vm_offset_t va; 2197 2198 va = sva; 2199 while (count-- > 0) { 2200 mmu_booke_kremove(mmu, va); 2201 va += PAGE_SIZE; 2202 } 2203 } 2204 2205 /* 2206 * Map a wired page into kernel virtual address space. 2207 */ 2208 static void 2209 mmu_booke_kenter(mmu_t mmu, vm_offset_t va, vm_paddr_t pa) 2210 { 2211 2212 mmu_booke_kenter_attr(mmu, va, pa, VM_MEMATTR_DEFAULT); 2213 } 2214 2215 static void 2216 mmu_booke_kenter_attr(mmu_t mmu, vm_offset_t va, vm_paddr_t pa, vm_memattr_t ma) 2217 { 2218 uint32_t flags; 2219 pte_t *pte; 2220 2221 KASSERT(((va >= VM_MIN_KERNEL_ADDRESS) && 2222 (va <= VM_MAX_KERNEL_ADDRESS)), ("mmu_booke_kenter: invalid va")); 2223 2224 flags = PTE_SR | PTE_SW | PTE_SX | PTE_WIRED | PTE_VALID; 2225 flags |= tlb_calc_wimg(pa, ma) << PTE_MAS2_SHIFT; 2226 flags |= PTE_PS_4KB; 2227 2228 pte = pte_find(mmu, kernel_pmap, va); 2229 KASSERT((pte != NULL), ("mmu_booke_kenter: invalid va. NULL PTE")); 2230 2231 mtx_lock_spin(&tlbivax_mutex); 2232 tlb_miss_lock(); 2233 2234 if (PTE_ISVALID(pte)) { 2235 2236 CTR1(KTR_PMAP, "%s: replacing entry!", __func__); 2237 2238 /* Flush entry from TLB0 */ 2239 tlb0_flush_entry(va); 2240 } 2241 2242 *pte = PTE_RPN_FROM_PA(pa) | flags; 2243 2244 //debugf("mmu_booke_kenter: pdir_idx = %d ptbl_idx = %d va=0x%08x " 2245 // "pa=0x%08x rpn=0x%08x flags=0x%08x\n", 2246 // pdir_idx, ptbl_idx, va, pa, pte->rpn, pte->flags); 2247 2248 /* Flush the real memory from the instruction cache. */ 2249 if ((flags & (PTE_I | PTE_G)) == 0) 2250 __syncicache((void *)va, PAGE_SIZE); 2251 2252 tlb_miss_unlock(); 2253 mtx_unlock_spin(&tlbivax_mutex); 2254 } 2255 2256 /* 2257 * Remove a page from kernel page table. 2258 */ 2259 static void 2260 mmu_booke_kremove(mmu_t mmu, vm_offset_t va) 2261 { 2262 pte_t *pte; 2263 2264 CTR2(KTR_PMAP,"%s: s (va = 0x%"PRI0ptrX")\n", __func__, va); 2265 2266 KASSERT(((va >= VM_MIN_KERNEL_ADDRESS) && 2267 (va <= VM_MAX_KERNEL_ADDRESS)), 2268 ("mmu_booke_kremove: invalid va")); 2269 2270 pte = pte_find(mmu, kernel_pmap, va); 2271 2272 if (!PTE_ISVALID(pte)) { 2273 2274 CTR1(KTR_PMAP, "%s: invalid pte", __func__); 2275 2276 return; 2277 } 2278 2279 mtx_lock_spin(&tlbivax_mutex); 2280 tlb_miss_lock(); 2281 2282 /* Invalidate entry in TLB0, update PTE. */ 2283 tlb0_flush_entry(va); 2284 *pte = 0; 2285 2286 tlb_miss_unlock(); 2287 mtx_unlock_spin(&tlbivax_mutex); 2288 } 2289 2290 /* 2291 * Provide a kernel pointer corresponding to a given userland pointer. 2292 * The returned pointer is valid until the next time this function is 2293 * called in this thread. This is used internally in copyin/copyout. 2294 */ 2295 int 2296 mmu_booke_map_user_ptr(mmu_t mmu, pmap_t pm, volatile const void *uaddr, 2297 void **kaddr, size_t ulen, size_t *klen) 2298 { 2299 2300 if ((uintptr_t)uaddr + ulen > VM_MAXUSER_ADDRESS + PAGE_SIZE) 2301 return (EFAULT); 2302 2303 *kaddr = (void *)(uintptr_t)uaddr; 2304 if (klen) 2305 *klen = ulen; 2306 2307 return (0); 2308 } 2309 2310 /* 2311 * Figure out where a given kernel pointer (usually in a fault) points 2312 * to from the VM's perspective, potentially remapping into userland's 2313 * address space. 2314 */ 2315 static int 2316 mmu_booke_decode_kernel_ptr(mmu_t mmu, vm_offset_t addr, int *is_user, 2317 vm_offset_t *decoded_addr) 2318 { 2319 2320 if (addr < VM_MAXUSER_ADDRESS) 2321 *is_user = 1; 2322 else 2323 *is_user = 0; 2324 2325 *decoded_addr = addr; 2326 return (0); 2327 } 2328 2329 /* 2330 * Initialize pmap associated with process 0. 2331 */ 2332 static void 2333 mmu_booke_pinit0(mmu_t mmu, pmap_t pmap) 2334 { 2335 2336 PMAP_LOCK_INIT(pmap); 2337 mmu_booke_pinit(mmu, pmap); 2338 PCPU_SET(curpmap, pmap); 2339 } 2340 2341 /* 2342 * Initialize a preallocated and zeroed pmap structure, 2343 * such as one in a vmspace structure. 2344 */ 2345 static void 2346 mmu_booke_pinit(mmu_t mmu, pmap_t pmap) 2347 { 2348 int i; 2349 2350 CTR4(KTR_PMAP, "%s: pmap = %p, proc %d '%s'", __func__, pmap, 2351 curthread->td_proc->p_pid, curthread->td_proc->p_comm); 2352 2353 KASSERT((pmap != kernel_pmap), ("pmap_pinit: initializing kernel_pmap")); 2354 2355 for (i = 0; i < MAXCPU; i++) 2356 pmap->pm_tid[i] = TID_NONE; 2357 CPU_ZERO(&kernel_pmap->pm_active); 2358 bzero(&pmap->pm_stats, sizeof(pmap->pm_stats)); 2359 #ifdef __powerpc64__ 2360 bzero(&pmap->pm_pp2d, sizeof(pte_t **) * PP2D_NENTRIES); 2361 TAILQ_INIT(&pmap->pm_pdir_list); 2362 #else 2363 bzero(&pmap->pm_pdir, sizeof(pte_t *) * PDIR_NENTRIES); 2364 #endif 2365 TAILQ_INIT(&pmap->pm_ptbl_list); 2366 } 2367 2368 /* 2369 * Release any resources held by the given physical map. 2370 * Called when a pmap initialized by mmu_booke_pinit is being released. 2371 * Should only be called if the map contains no valid mappings. 2372 */ 2373 static void 2374 mmu_booke_release(mmu_t mmu, pmap_t pmap) 2375 { 2376 2377 KASSERT(pmap->pm_stats.resident_count == 0, 2378 ("pmap_release: pmap resident count %ld != 0", 2379 pmap->pm_stats.resident_count)); 2380 } 2381 2382 /* 2383 * Insert the given physical page at the specified virtual address in the 2384 * target physical map with the protection requested. If specified the page 2385 * will be wired down. 2386 */ 2387 static int 2388 mmu_booke_enter(mmu_t mmu, pmap_t pmap, vm_offset_t va, vm_page_t m, 2389 vm_prot_t prot, u_int flags, int8_t psind) 2390 { 2391 int error; 2392 2393 rw_wlock(&pvh_global_lock); 2394 PMAP_LOCK(pmap); 2395 error = mmu_booke_enter_locked(mmu, pmap, va, m, prot, flags, psind); 2396 PMAP_UNLOCK(pmap); 2397 rw_wunlock(&pvh_global_lock); 2398 return (error); 2399 } 2400 2401 static int 2402 mmu_booke_enter_locked(mmu_t mmu, pmap_t pmap, vm_offset_t va, vm_page_t m, 2403 vm_prot_t prot, u_int pmap_flags, int8_t psind __unused) 2404 { 2405 pte_t *pte; 2406 vm_paddr_t pa; 2407 uint32_t flags; 2408 int error, su, sync; 2409 2410 pa = VM_PAGE_TO_PHYS(m); 2411 su = (pmap == kernel_pmap); 2412 sync = 0; 2413 2414 //debugf("mmu_booke_enter_locked: s (pmap=0x%08x su=%d tid=%d m=0x%08x va=0x%08x " 2415 // "pa=0x%08x prot=0x%08x flags=%#x)\n", 2416 // (u_int32_t)pmap, su, pmap->pm_tid, 2417 // (u_int32_t)m, va, pa, prot, flags); 2418 2419 if (su) { 2420 KASSERT(((va >= virtual_avail) && 2421 (va <= VM_MAX_KERNEL_ADDRESS)), 2422 ("mmu_booke_enter_locked: kernel pmap, non kernel va")); 2423 } else { 2424 KASSERT((va <= VM_MAXUSER_ADDRESS), 2425 ("mmu_booke_enter_locked: user pmap, non user va")); 2426 } 2427 if ((m->oflags & VPO_UNMANAGED) == 0 && !vm_page_xbusied(m)) 2428 VM_OBJECT_ASSERT_LOCKED(m->object); 2429 2430 PMAP_LOCK_ASSERT(pmap, MA_OWNED); 2431 2432 /* 2433 * If there is an existing mapping, and the physical address has not 2434 * changed, must be protection or wiring change. 2435 */ 2436 if (((pte = pte_find(mmu, pmap, va)) != NULL) && 2437 (PTE_ISVALID(pte)) && (PTE_PA(pte) == pa)) { 2438 2439 /* 2440 * Before actually updating pte->flags we calculate and 2441 * prepare its new value in a helper var. 2442 */ 2443 flags = *pte; 2444 flags &= ~(PTE_UW | PTE_UX | PTE_SW | PTE_SX | PTE_MODIFIED); 2445 2446 /* Wiring change, just update stats. */ 2447 if ((pmap_flags & PMAP_ENTER_WIRED) != 0) { 2448 if (!PTE_ISWIRED(pte)) { 2449 flags |= PTE_WIRED; 2450 pmap->pm_stats.wired_count++; 2451 } 2452 } else { 2453 if (PTE_ISWIRED(pte)) { 2454 flags &= ~PTE_WIRED; 2455 pmap->pm_stats.wired_count--; 2456 } 2457 } 2458 2459 if (prot & VM_PROT_WRITE) { 2460 /* Add write permissions. */ 2461 flags |= PTE_SW; 2462 if (!su) 2463 flags |= PTE_UW; 2464 2465 if ((flags & PTE_MANAGED) != 0) 2466 vm_page_aflag_set(m, PGA_WRITEABLE); 2467 } else { 2468 /* Handle modified pages, sense modify status. */ 2469 2470 /* 2471 * The PTE_MODIFIED flag could be set by underlying 2472 * TLB misses since we last read it (above), possibly 2473 * other CPUs could update it so we check in the PTE 2474 * directly rather than rely on that saved local flags 2475 * copy. 2476 */ 2477 if (PTE_ISMODIFIED(pte)) 2478 vm_page_dirty(m); 2479 } 2480 2481 if (prot & VM_PROT_EXECUTE) { 2482 flags |= PTE_SX; 2483 if (!su) 2484 flags |= PTE_UX; 2485 2486 /* 2487 * Check existing flags for execute permissions: if we 2488 * are turning execute permissions on, icache should 2489 * be flushed. 2490 */ 2491 if ((*pte & (PTE_UX | PTE_SX)) == 0) 2492 sync++; 2493 } 2494 2495 flags &= ~PTE_REFERENCED; 2496 2497 /* 2498 * The new flags value is all calculated -- only now actually 2499 * update the PTE. 2500 */ 2501 mtx_lock_spin(&tlbivax_mutex); 2502 tlb_miss_lock(); 2503 2504 tlb0_flush_entry(va); 2505 *pte &= ~PTE_FLAGS_MASK; 2506 *pte |= flags; 2507 2508 tlb_miss_unlock(); 2509 mtx_unlock_spin(&tlbivax_mutex); 2510 2511 } else { 2512 /* 2513 * If there is an existing mapping, but it's for a different 2514 * physical address, pte_enter() will delete the old mapping. 2515 */ 2516 //if ((pte != NULL) && PTE_ISVALID(pte)) 2517 // debugf("mmu_booke_enter_locked: replace\n"); 2518 //else 2519 // debugf("mmu_booke_enter_locked: new\n"); 2520 2521 /* Now set up the flags and install the new mapping. */ 2522 flags = (PTE_SR | PTE_VALID); 2523 flags |= PTE_M; 2524 2525 if (!su) 2526 flags |= PTE_UR; 2527 2528 if (prot & VM_PROT_WRITE) { 2529 flags |= PTE_SW; 2530 if (!su) 2531 flags |= PTE_UW; 2532 2533 if ((m->oflags & VPO_UNMANAGED) == 0) 2534 vm_page_aflag_set(m, PGA_WRITEABLE); 2535 } 2536 2537 if (prot & VM_PROT_EXECUTE) { 2538 flags |= PTE_SX; 2539 if (!su) 2540 flags |= PTE_UX; 2541 } 2542 2543 /* If its wired update stats. */ 2544 if ((pmap_flags & PMAP_ENTER_WIRED) != 0) 2545 flags |= PTE_WIRED; 2546 2547 error = pte_enter(mmu, pmap, m, va, flags, 2548 (pmap_flags & PMAP_ENTER_NOSLEEP) != 0); 2549 if (error != 0) 2550 return (KERN_RESOURCE_SHORTAGE); 2551 2552 if ((flags & PMAP_ENTER_WIRED) != 0) 2553 pmap->pm_stats.wired_count++; 2554 2555 /* Flush the real memory from the instruction cache. */ 2556 if (prot & VM_PROT_EXECUTE) 2557 sync++; 2558 } 2559 2560 if (sync && (su || pmap == PCPU_GET(curpmap))) { 2561 __syncicache((void *)va, PAGE_SIZE); 2562 sync = 0; 2563 } 2564 2565 return (KERN_SUCCESS); 2566 } 2567 2568 /* 2569 * Maps a sequence of resident pages belonging to the same object. 2570 * The sequence begins with the given page m_start. This page is 2571 * mapped at the given virtual address start. Each subsequent page is 2572 * mapped at a virtual address that is offset from start by the same 2573 * amount as the page is offset from m_start within the object. The 2574 * last page in the sequence is the page with the largest offset from 2575 * m_start that can be mapped at a virtual address less than the given 2576 * virtual address end. Not every virtual page between start and end 2577 * is mapped; only those for which a resident page exists with the 2578 * corresponding offset from m_start are mapped. 2579 */ 2580 static void 2581 mmu_booke_enter_object(mmu_t mmu, pmap_t pmap, vm_offset_t start, 2582 vm_offset_t end, vm_page_t m_start, vm_prot_t prot) 2583 { 2584 vm_page_t m; 2585 vm_pindex_t diff, psize; 2586 2587 VM_OBJECT_ASSERT_LOCKED(m_start->object); 2588 2589 psize = atop(end - start); 2590 m = m_start; 2591 rw_wlock(&pvh_global_lock); 2592 PMAP_LOCK(pmap); 2593 while (m != NULL && (diff = m->pindex - m_start->pindex) < psize) { 2594 mmu_booke_enter_locked(mmu, pmap, start + ptoa(diff), m, 2595 prot & (VM_PROT_READ | VM_PROT_EXECUTE), 2596 PMAP_ENTER_NOSLEEP, 0); 2597 m = TAILQ_NEXT(m, listq); 2598 } 2599 rw_wunlock(&pvh_global_lock); 2600 PMAP_UNLOCK(pmap); 2601 } 2602 2603 static void 2604 mmu_booke_enter_quick(mmu_t mmu, pmap_t pmap, vm_offset_t va, vm_page_t m, 2605 vm_prot_t prot) 2606 { 2607 2608 rw_wlock(&pvh_global_lock); 2609 PMAP_LOCK(pmap); 2610 mmu_booke_enter_locked(mmu, pmap, va, m, 2611 prot & (VM_PROT_READ | VM_PROT_EXECUTE), PMAP_ENTER_NOSLEEP, 2612 0); 2613 rw_wunlock(&pvh_global_lock); 2614 PMAP_UNLOCK(pmap); 2615 } 2616 2617 /* 2618 * Remove the given range of addresses from the specified map. 2619 * 2620 * It is assumed that the start and end are properly rounded to the page size. 2621 */ 2622 static void 2623 mmu_booke_remove(mmu_t mmu, pmap_t pmap, vm_offset_t va, vm_offset_t endva) 2624 { 2625 pte_t *pte; 2626 uint8_t hold_flag; 2627 2628 int su = (pmap == kernel_pmap); 2629 2630 //debugf("mmu_booke_remove: s (su = %d pmap=0x%08x tid=%d va=0x%08x endva=0x%08x)\n", 2631 // su, (u_int32_t)pmap, pmap->pm_tid, va, endva); 2632 2633 if (su) { 2634 KASSERT(((va >= virtual_avail) && 2635 (va <= VM_MAX_KERNEL_ADDRESS)), 2636 ("mmu_booke_remove: kernel pmap, non kernel va")); 2637 } else { 2638 KASSERT((va <= VM_MAXUSER_ADDRESS), 2639 ("mmu_booke_remove: user pmap, non user va")); 2640 } 2641 2642 if (PMAP_REMOVE_DONE(pmap)) { 2643 //debugf("mmu_booke_remove: e (empty)\n"); 2644 return; 2645 } 2646 2647 hold_flag = PTBL_HOLD_FLAG(pmap); 2648 //debugf("mmu_booke_remove: hold_flag = %d\n", hold_flag); 2649 2650 rw_wlock(&pvh_global_lock); 2651 PMAP_LOCK(pmap); 2652 for (; va < endva; va += PAGE_SIZE) { 2653 pte = pte_find(mmu, pmap, va); 2654 if ((pte != NULL) && PTE_ISVALID(pte)) 2655 pte_remove(mmu, pmap, va, hold_flag); 2656 } 2657 PMAP_UNLOCK(pmap); 2658 rw_wunlock(&pvh_global_lock); 2659 2660 //debugf("mmu_booke_remove: e\n"); 2661 } 2662 2663 /* 2664 * Remove physical page from all pmaps in which it resides. 2665 */ 2666 static void 2667 mmu_booke_remove_all(mmu_t mmu, vm_page_t m) 2668 { 2669 pv_entry_t pv, pvn; 2670 uint8_t hold_flag; 2671 2672 rw_wlock(&pvh_global_lock); 2673 for (pv = TAILQ_FIRST(&m->md.pv_list); pv != NULL; pv = pvn) { 2674 pvn = TAILQ_NEXT(pv, pv_link); 2675 2676 PMAP_LOCK(pv->pv_pmap); 2677 hold_flag = PTBL_HOLD_FLAG(pv->pv_pmap); 2678 pte_remove(mmu, pv->pv_pmap, pv->pv_va, hold_flag); 2679 PMAP_UNLOCK(pv->pv_pmap); 2680 } 2681 vm_page_aflag_clear(m, PGA_WRITEABLE); 2682 rw_wunlock(&pvh_global_lock); 2683 } 2684 2685 /* 2686 * Map a range of physical addresses into kernel virtual address space. 2687 */ 2688 static vm_offset_t 2689 mmu_booke_map(mmu_t mmu, vm_offset_t *virt, vm_paddr_t pa_start, 2690 vm_paddr_t pa_end, int prot) 2691 { 2692 vm_offset_t sva = *virt; 2693 vm_offset_t va = sva; 2694 2695 //debugf("mmu_booke_map: s (sva = 0x%08x pa_start = 0x%08x pa_end = 0x%08x)\n", 2696 // sva, pa_start, pa_end); 2697 2698 while (pa_start < pa_end) { 2699 mmu_booke_kenter(mmu, va, pa_start); 2700 va += PAGE_SIZE; 2701 pa_start += PAGE_SIZE; 2702 } 2703 *virt = va; 2704 2705 //debugf("mmu_booke_map: e (va = 0x%08x)\n", va); 2706 return (sva); 2707 } 2708 2709 /* 2710 * The pmap must be activated before it's address space can be accessed in any 2711 * way. 2712 */ 2713 static void 2714 mmu_booke_activate(mmu_t mmu, struct thread *td) 2715 { 2716 pmap_t pmap; 2717 u_int cpuid; 2718 2719 pmap = &td->td_proc->p_vmspace->vm_pmap; 2720 2721 CTR5(KTR_PMAP, "%s: s (td = %p, proc = '%s', id = %d, pmap = 0x%"PRI0ptrX")", 2722 __func__, td, td->td_proc->p_comm, td->td_proc->p_pid, pmap); 2723 2724 KASSERT((pmap != kernel_pmap), ("mmu_booke_activate: kernel_pmap!")); 2725 2726 sched_pin(); 2727 2728 cpuid = PCPU_GET(cpuid); 2729 CPU_SET_ATOMIC(cpuid, &pmap->pm_active); 2730 PCPU_SET(curpmap, pmap); 2731 2732 if (pmap->pm_tid[cpuid] == TID_NONE) 2733 tid_alloc(pmap); 2734 2735 /* Load PID0 register with pmap tid value. */ 2736 mtspr(SPR_PID0, pmap->pm_tid[cpuid]); 2737 __asm __volatile("isync"); 2738 2739 mtspr(SPR_DBCR0, td->td_pcb->pcb_cpu.booke.dbcr0); 2740 2741 sched_unpin(); 2742 2743 CTR3(KTR_PMAP, "%s: e (tid = %d for '%s')", __func__, 2744 pmap->pm_tid[PCPU_GET(cpuid)], td->td_proc->p_comm); 2745 } 2746 2747 /* 2748 * Deactivate the specified process's address space. 2749 */ 2750 static void 2751 mmu_booke_deactivate(mmu_t mmu, struct thread *td) 2752 { 2753 pmap_t pmap; 2754 2755 pmap = &td->td_proc->p_vmspace->vm_pmap; 2756 2757 CTR5(KTR_PMAP, "%s: td=%p, proc = '%s', id = %d, pmap = 0x%"PRI0ptrX, 2758 __func__, td, td->td_proc->p_comm, td->td_proc->p_pid, pmap); 2759 2760 td->td_pcb->pcb_cpu.booke.dbcr0 = mfspr(SPR_DBCR0); 2761 2762 CPU_CLR_ATOMIC(PCPU_GET(cpuid), &pmap->pm_active); 2763 PCPU_SET(curpmap, NULL); 2764 } 2765 2766 /* 2767 * Copy the range specified by src_addr/len 2768 * from the source map to the range dst_addr/len 2769 * in the destination map. 2770 * 2771 * This routine is only advisory and need not do anything. 2772 */ 2773 static void 2774 mmu_booke_copy(mmu_t mmu, pmap_t dst_pmap, pmap_t src_pmap, 2775 vm_offset_t dst_addr, vm_size_t len, vm_offset_t src_addr) 2776 { 2777 2778 } 2779 2780 /* 2781 * Set the physical protection on the specified range of this map as requested. 2782 */ 2783 static void 2784 mmu_booke_protect(mmu_t mmu, pmap_t pmap, vm_offset_t sva, vm_offset_t eva, 2785 vm_prot_t prot) 2786 { 2787 vm_offset_t va; 2788 vm_page_t m; 2789 pte_t *pte; 2790 2791 if ((prot & VM_PROT_READ) == VM_PROT_NONE) { 2792 mmu_booke_remove(mmu, pmap, sva, eva); 2793 return; 2794 } 2795 2796 if (prot & VM_PROT_WRITE) 2797 return; 2798 2799 PMAP_LOCK(pmap); 2800 for (va = sva; va < eva; va += PAGE_SIZE) { 2801 if ((pte = pte_find(mmu, pmap, va)) != NULL) { 2802 if (PTE_ISVALID(pte)) { 2803 m = PHYS_TO_VM_PAGE(PTE_PA(pte)); 2804 2805 mtx_lock_spin(&tlbivax_mutex); 2806 tlb_miss_lock(); 2807 2808 /* Handle modified pages. */ 2809 if (PTE_ISMODIFIED(pte) && PTE_ISMANAGED(pte)) 2810 vm_page_dirty(m); 2811 2812 tlb0_flush_entry(va); 2813 *pte &= ~(PTE_UW | PTE_SW | PTE_MODIFIED); 2814 2815 tlb_miss_unlock(); 2816 mtx_unlock_spin(&tlbivax_mutex); 2817 } 2818 } 2819 } 2820 PMAP_UNLOCK(pmap); 2821 } 2822 2823 /* 2824 * Clear the write and modified bits in each of the given page's mappings. 2825 */ 2826 static void 2827 mmu_booke_remove_write(mmu_t mmu, vm_page_t m) 2828 { 2829 pv_entry_t pv; 2830 pte_t *pte; 2831 2832 KASSERT((m->oflags & VPO_UNMANAGED) == 0, 2833 ("mmu_booke_remove_write: page %p is not managed", m)); 2834 2835 /* 2836 * If the page is not exclusive busied, then PGA_WRITEABLE cannot be 2837 * set by another thread while the object is locked. Thus, 2838 * if PGA_WRITEABLE is clear, no page table entries need updating. 2839 */ 2840 VM_OBJECT_ASSERT_WLOCKED(m->object); 2841 if (!vm_page_xbusied(m) && (m->aflags & PGA_WRITEABLE) == 0) 2842 return; 2843 rw_wlock(&pvh_global_lock); 2844 TAILQ_FOREACH(pv, &m->md.pv_list, pv_link) { 2845 PMAP_LOCK(pv->pv_pmap); 2846 if ((pte = pte_find(mmu, pv->pv_pmap, pv->pv_va)) != NULL) { 2847 if (PTE_ISVALID(pte)) { 2848 m = PHYS_TO_VM_PAGE(PTE_PA(pte)); 2849 2850 mtx_lock_spin(&tlbivax_mutex); 2851 tlb_miss_lock(); 2852 2853 /* Handle modified pages. */ 2854 if (PTE_ISMODIFIED(pte)) 2855 vm_page_dirty(m); 2856 2857 /* Flush mapping from TLB0. */ 2858 *pte &= ~(PTE_UW | PTE_SW | PTE_MODIFIED); 2859 2860 tlb_miss_unlock(); 2861 mtx_unlock_spin(&tlbivax_mutex); 2862 } 2863 } 2864 PMAP_UNLOCK(pv->pv_pmap); 2865 } 2866 vm_page_aflag_clear(m, PGA_WRITEABLE); 2867 rw_wunlock(&pvh_global_lock); 2868 } 2869 2870 static void 2871 mmu_booke_sync_icache(mmu_t mmu, pmap_t pm, vm_offset_t va, vm_size_t sz) 2872 { 2873 pte_t *pte; 2874 pmap_t pmap; 2875 vm_page_t m; 2876 vm_offset_t addr; 2877 vm_paddr_t pa = 0; 2878 int active, valid; 2879 2880 va = trunc_page(va); 2881 sz = round_page(sz); 2882 2883 rw_wlock(&pvh_global_lock); 2884 pmap = PCPU_GET(curpmap); 2885 active = (pm == kernel_pmap || pm == pmap) ? 1 : 0; 2886 while (sz > 0) { 2887 PMAP_LOCK(pm); 2888 pte = pte_find(mmu, pm, va); 2889 valid = (pte != NULL && PTE_ISVALID(pte)) ? 1 : 0; 2890 if (valid) 2891 pa = PTE_PA(pte); 2892 PMAP_UNLOCK(pm); 2893 if (valid) { 2894 if (!active) { 2895 /* Create a mapping in the active pmap. */ 2896 addr = 0; 2897 m = PHYS_TO_VM_PAGE(pa); 2898 PMAP_LOCK(pmap); 2899 pte_enter(mmu, pmap, m, addr, 2900 PTE_SR | PTE_VALID | PTE_UR, FALSE); 2901 __syncicache((void *)addr, PAGE_SIZE); 2902 pte_remove(mmu, pmap, addr, PTBL_UNHOLD); 2903 PMAP_UNLOCK(pmap); 2904 } else 2905 __syncicache((void *)va, PAGE_SIZE); 2906 } 2907 va += PAGE_SIZE; 2908 sz -= PAGE_SIZE; 2909 } 2910 rw_wunlock(&pvh_global_lock); 2911 } 2912 2913 /* 2914 * Atomically extract and hold the physical page with the given 2915 * pmap and virtual address pair if that mapping permits the given 2916 * protection. 2917 */ 2918 static vm_page_t 2919 mmu_booke_extract_and_hold(mmu_t mmu, pmap_t pmap, vm_offset_t va, 2920 vm_prot_t prot) 2921 { 2922 pte_t *pte; 2923 vm_page_t m; 2924 uint32_t pte_wbit; 2925 vm_paddr_t pa; 2926 2927 m = NULL; 2928 pa = 0; 2929 PMAP_LOCK(pmap); 2930 retry: 2931 pte = pte_find(mmu, pmap, va); 2932 if ((pte != NULL) && PTE_ISVALID(pte)) { 2933 if (pmap == kernel_pmap) 2934 pte_wbit = PTE_SW; 2935 else 2936 pte_wbit = PTE_UW; 2937 2938 if ((*pte & pte_wbit) || ((prot & VM_PROT_WRITE) == 0)) { 2939 if (vm_page_pa_tryrelock(pmap, PTE_PA(pte), &pa)) 2940 goto retry; 2941 m = PHYS_TO_VM_PAGE(PTE_PA(pte)); 2942 vm_page_hold(m); 2943 } 2944 } 2945 2946 PA_UNLOCK_COND(pa); 2947 PMAP_UNLOCK(pmap); 2948 return (m); 2949 } 2950 2951 /* 2952 * Initialize a vm_page's machine-dependent fields. 2953 */ 2954 static void 2955 mmu_booke_page_init(mmu_t mmu, vm_page_t m) 2956 { 2957 2958 m->md.pv_tracked = 0; 2959 TAILQ_INIT(&m->md.pv_list); 2960 } 2961 2962 /* 2963 * mmu_booke_zero_page_area zeros the specified hardware page by 2964 * mapping it into virtual memory and using bzero to clear 2965 * its contents. 2966 * 2967 * off and size must reside within a single page. 2968 */ 2969 static void 2970 mmu_booke_zero_page_area(mmu_t mmu, vm_page_t m, int off, int size) 2971 { 2972 vm_offset_t va; 2973 2974 /* XXX KASSERT off and size are within a single page? */ 2975 2976 mtx_lock(&zero_page_mutex); 2977 va = zero_page_va; 2978 2979 mmu_booke_kenter(mmu, va, VM_PAGE_TO_PHYS(m)); 2980 bzero((caddr_t)va + off, size); 2981 mmu_booke_kremove(mmu, va); 2982 2983 mtx_unlock(&zero_page_mutex); 2984 } 2985 2986 /* 2987 * mmu_booke_zero_page zeros the specified hardware page. 2988 */ 2989 static void 2990 mmu_booke_zero_page(mmu_t mmu, vm_page_t m) 2991 { 2992 vm_offset_t off, va; 2993 2994 mtx_lock(&zero_page_mutex); 2995 va = zero_page_va; 2996 2997 mmu_booke_kenter(mmu, va, VM_PAGE_TO_PHYS(m)); 2998 for (off = 0; off < PAGE_SIZE; off += cacheline_size) 2999 __asm __volatile("dcbz 0,%0" :: "r"(va + off)); 3000 mmu_booke_kremove(mmu, va); 3001 3002 mtx_unlock(&zero_page_mutex); 3003 } 3004 3005 /* 3006 * mmu_booke_copy_page copies the specified (machine independent) page by 3007 * mapping the page into virtual memory and using memcopy to copy the page, 3008 * one machine dependent page at a time. 3009 */ 3010 static void 3011 mmu_booke_copy_page(mmu_t mmu, vm_page_t sm, vm_page_t dm) 3012 { 3013 vm_offset_t sva, dva; 3014 3015 sva = copy_page_src_va; 3016 dva = copy_page_dst_va; 3017 3018 mtx_lock(©_page_mutex); 3019 mmu_booke_kenter(mmu, sva, VM_PAGE_TO_PHYS(sm)); 3020 mmu_booke_kenter(mmu, dva, VM_PAGE_TO_PHYS(dm)); 3021 memcpy((caddr_t)dva, (caddr_t)sva, PAGE_SIZE); 3022 mmu_booke_kremove(mmu, dva); 3023 mmu_booke_kremove(mmu, sva); 3024 mtx_unlock(©_page_mutex); 3025 } 3026 3027 static inline void 3028 mmu_booke_copy_pages(mmu_t mmu, vm_page_t *ma, vm_offset_t a_offset, 3029 vm_page_t *mb, vm_offset_t b_offset, int xfersize) 3030 { 3031 void *a_cp, *b_cp; 3032 vm_offset_t a_pg_offset, b_pg_offset; 3033 int cnt; 3034 3035 mtx_lock(©_page_mutex); 3036 while (xfersize > 0) { 3037 a_pg_offset = a_offset & PAGE_MASK; 3038 cnt = min(xfersize, PAGE_SIZE - a_pg_offset); 3039 mmu_booke_kenter(mmu, copy_page_src_va, 3040 VM_PAGE_TO_PHYS(ma[a_offset >> PAGE_SHIFT])); 3041 a_cp = (char *)copy_page_src_va + a_pg_offset; 3042 b_pg_offset = b_offset & PAGE_MASK; 3043 cnt = min(cnt, PAGE_SIZE - b_pg_offset); 3044 mmu_booke_kenter(mmu, copy_page_dst_va, 3045 VM_PAGE_TO_PHYS(mb[b_offset >> PAGE_SHIFT])); 3046 b_cp = (char *)copy_page_dst_va + b_pg_offset; 3047 bcopy(a_cp, b_cp, cnt); 3048 mmu_booke_kremove(mmu, copy_page_dst_va); 3049 mmu_booke_kremove(mmu, copy_page_src_va); 3050 a_offset += cnt; 3051 b_offset += cnt; 3052 xfersize -= cnt; 3053 } 3054 mtx_unlock(©_page_mutex); 3055 } 3056 3057 static vm_offset_t 3058 mmu_booke_quick_enter_page(mmu_t mmu, vm_page_t m) 3059 { 3060 vm_paddr_t paddr; 3061 vm_offset_t qaddr; 3062 uint32_t flags; 3063 pte_t *pte; 3064 3065 paddr = VM_PAGE_TO_PHYS(m); 3066 3067 flags = PTE_SR | PTE_SW | PTE_SX | PTE_WIRED | PTE_VALID; 3068 flags |= tlb_calc_wimg(paddr, pmap_page_get_memattr(m)) << PTE_MAS2_SHIFT; 3069 flags |= PTE_PS_4KB; 3070 3071 critical_enter(); 3072 qaddr = PCPU_GET(qmap_addr); 3073 3074 pte = pte_find(mmu, kernel_pmap, qaddr); 3075 3076 KASSERT(*pte == 0, ("mmu_booke_quick_enter_page: PTE busy")); 3077 3078 /* 3079 * XXX: tlbivax is broadcast to other cores, but qaddr should 3080 * not be present in other TLBs. Is there a better instruction 3081 * sequence to use? Or just forget it & use mmu_booke_kenter()... 3082 */ 3083 __asm __volatile("tlbivax 0, %0" :: "r"(qaddr & MAS2_EPN_MASK)); 3084 __asm __volatile("isync; msync"); 3085 3086 *pte = PTE_RPN_FROM_PA(paddr) | flags; 3087 3088 /* Flush the real memory from the instruction cache. */ 3089 if ((flags & (PTE_I | PTE_G)) == 0) 3090 __syncicache((void *)qaddr, PAGE_SIZE); 3091 3092 return (qaddr); 3093 } 3094 3095 static void 3096 mmu_booke_quick_remove_page(mmu_t mmu, vm_offset_t addr) 3097 { 3098 pte_t *pte; 3099 3100 pte = pte_find(mmu, kernel_pmap, addr); 3101 3102 KASSERT(PCPU_GET(qmap_addr) == addr, 3103 ("mmu_booke_quick_remove_page: invalid address")); 3104 KASSERT(*pte != 0, 3105 ("mmu_booke_quick_remove_page: PTE not in use")); 3106 3107 *pte = 0; 3108 critical_exit(); 3109 } 3110 3111 /* 3112 * Return whether or not the specified physical page was modified 3113 * in any of physical maps. 3114 */ 3115 static boolean_t 3116 mmu_booke_is_modified(mmu_t mmu, vm_page_t m) 3117 { 3118 pte_t *pte; 3119 pv_entry_t pv; 3120 boolean_t rv; 3121 3122 KASSERT((m->oflags & VPO_UNMANAGED) == 0, 3123 ("mmu_booke_is_modified: page %p is not managed", m)); 3124 rv = FALSE; 3125 3126 /* 3127 * If the page is not exclusive busied, then PGA_WRITEABLE cannot be 3128 * concurrently set while the object is locked. Thus, if PGA_WRITEABLE 3129 * is clear, no PTEs can be modified. 3130 */ 3131 VM_OBJECT_ASSERT_WLOCKED(m->object); 3132 if (!vm_page_xbusied(m) && (m->aflags & PGA_WRITEABLE) == 0) 3133 return (rv); 3134 rw_wlock(&pvh_global_lock); 3135 TAILQ_FOREACH(pv, &m->md.pv_list, pv_link) { 3136 PMAP_LOCK(pv->pv_pmap); 3137 if ((pte = pte_find(mmu, pv->pv_pmap, pv->pv_va)) != NULL && 3138 PTE_ISVALID(pte)) { 3139 if (PTE_ISMODIFIED(pte)) 3140 rv = TRUE; 3141 } 3142 PMAP_UNLOCK(pv->pv_pmap); 3143 if (rv) 3144 break; 3145 } 3146 rw_wunlock(&pvh_global_lock); 3147 return (rv); 3148 } 3149 3150 /* 3151 * Return whether or not the specified virtual address is eligible 3152 * for prefault. 3153 */ 3154 static boolean_t 3155 mmu_booke_is_prefaultable(mmu_t mmu, pmap_t pmap, vm_offset_t addr) 3156 { 3157 3158 return (FALSE); 3159 } 3160 3161 /* 3162 * Return whether or not the specified physical page was referenced 3163 * in any physical maps. 3164 */ 3165 static boolean_t 3166 mmu_booke_is_referenced(mmu_t mmu, vm_page_t m) 3167 { 3168 pte_t *pte; 3169 pv_entry_t pv; 3170 boolean_t rv; 3171 3172 KASSERT((m->oflags & VPO_UNMANAGED) == 0, 3173 ("mmu_booke_is_referenced: page %p is not managed", m)); 3174 rv = FALSE; 3175 rw_wlock(&pvh_global_lock); 3176 TAILQ_FOREACH(pv, &m->md.pv_list, pv_link) { 3177 PMAP_LOCK(pv->pv_pmap); 3178 if ((pte = pte_find(mmu, pv->pv_pmap, pv->pv_va)) != NULL && 3179 PTE_ISVALID(pte)) { 3180 if (PTE_ISREFERENCED(pte)) 3181 rv = TRUE; 3182 } 3183 PMAP_UNLOCK(pv->pv_pmap); 3184 if (rv) 3185 break; 3186 } 3187 rw_wunlock(&pvh_global_lock); 3188 return (rv); 3189 } 3190 3191 /* 3192 * Clear the modify bits on the specified physical page. 3193 */ 3194 static void 3195 mmu_booke_clear_modify(mmu_t mmu, vm_page_t m) 3196 { 3197 pte_t *pte; 3198 pv_entry_t pv; 3199 3200 KASSERT((m->oflags & VPO_UNMANAGED) == 0, 3201 ("mmu_booke_clear_modify: page %p is not managed", m)); 3202 VM_OBJECT_ASSERT_WLOCKED(m->object); 3203 KASSERT(!vm_page_xbusied(m), 3204 ("mmu_booke_clear_modify: page %p is exclusive busied", m)); 3205 3206 /* 3207 * If the page is not PG_AWRITEABLE, then no PTEs can be modified. 3208 * If the object containing the page is locked and the page is not 3209 * exclusive busied, then PG_AWRITEABLE cannot be concurrently set. 3210 */ 3211 if ((m->aflags & PGA_WRITEABLE) == 0) 3212 return; 3213 rw_wlock(&pvh_global_lock); 3214 TAILQ_FOREACH(pv, &m->md.pv_list, pv_link) { 3215 PMAP_LOCK(pv->pv_pmap); 3216 if ((pte = pte_find(mmu, pv->pv_pmap, pv->pv_va)) != NULL && 3217 PTE_ISVALID(pte)) { 3218 mtx_lock_spin(&tlbivax_mutex); 3219 tlb_miss_lock(); 3220 3221 if (*pte & (PTE_SW | PTE_UW | PTE_MODIFIED)) { 3222 tlb0_flush_entry(pv->pv_va); 3223 *pte &= ~(PTE_SW | PTE_UW | PTE_MODIFIED | 3224 PTE_REFERENCED); 3225 } 3226 3227 tlb_miss_unlock(); 3228 mtx_unlock_spin(&tlbivax_mutex); 3229 } 3230 PMAP_UNLOCK(pv->pv_pmap); 3231 } 3232 rw_wunlock(&pvh_global_lock); 3233 } 3234 3235 /* 3236 * Return a count of reference bits for a page, clearing those bits. 3237 * It is not necessary for every reference bit to be cleared, but it 3238 * is necessary that 0 only be returned when there are truly no 3239 * reference bits set. 3240 * 3241 * As an optimization, update the page's dirty field if a modified bit is 3242 * found while counting reference bits. This opportunistic update can be 3243 * performed at low cost and can eliminate the need for some future calls 3244 * to pmap_is_modified(). However, since this function stops after 3245 * finding PMAP_TS_REFERENCED_MAX reference bits, it may not detect some 3246 * dirty pages. Those dirty pages will only be detected by a future call 3247 * to pmap_is_modified(). 3248 */ 3249 static int 3250 mmu_booke_ts_referenced(mmu_t mmu, vm_page_t m) 3251 { 3252 pte_t *pte; 3253 pv_entry_t pv; 3254 int count; 3255 3256 KASSERT((m->oflags & VPO_UNMANAGED) == 0, 3257 ("mmu_booke_ts_referenced: page %p is not managed", m)); 3258 count = 0; 3259 rw_wlock(&pvh_global_lock); 3260 TAILQ_FOREACH(pv, &m->md.pv_list, pv_link) { 3261 PMAP_LOCK(pv->pv_pmap); 3262 if ((pte = pte_find(mmu, pv->pv_pmap, pv->pv_va)) != NULL && 3263 PTE_ISVALID(pte)) { 3264 if (PTE_ISMODIFIED(pte)) 3265 vm_page_dirty(m); 3266 if (PTE_ISREFERENCED(pte)) { 3267 mtx_lock_spin(&tlbivax_mutex); 3268 tlb_miss_lock(); 3269 3270 tlb0_flush_entry(pv->pv_va); 3271 *pte &= ~PTE_REFERENCED; 3272 3273 tlb_miss_unlock(); 3274 mtx_unlock_spin(&tlbivax_mutex); 3275 3276 if (++count >= PMAP_TS_REFERENCED_MAX) { 3277 PMAP_UNLOCK(pv->pv_pmap); 3278 break; 3279 } 3280 } 3281 } 3282 PMAP_UNLOCK(pv->pv_pmap); 3283 } 3284 rw_wunlock(&pvh_global_lock); 3285 return (count); 3286 } 3287 3288 /* 3289 * Clear the wired attribute from the mappings for the specified range of 3290 * addresses in the given pmap. Every valid mapping within that range must 3291 * have the wired attribute set. In contrast, invalid mappings cannot have 3292 * the wired attribute set, so they are ignored. 3293 * 3294 * The wired attribute of the page table entry is not a hardware feature, so 3295 * there is no need to invalidate any TLB entries. 3296 */ 3297 static void 3298 mmu_booke_unwire(mmu_t mmu, pmap_t pmap, vm_offset_t sva, vm_offset_t eva) 3299 { 3300 vm_offset_t va; 3301 pte_t *pte; 3302 3303 PMAP_LOCK(pmap); 3304 for (va = sva; va < eva; va += PAGE_SIZE) { 3305 if ((pte = pte_find(mmu, pmap, va)) != NULL && 3306 PTE_ISVALID(pte)) { 3307 if (!PTE_ISWIRED(pte)) 3308 panic("mmu_booke_unwire: pte %p isn't wired", 3309 pte); 3310 *pte &= ~PTE_WIRED; 3311 pmap->pm_stats.wired_count--; 3312 } 3313 } 3314 PMAP_UNLOCK(pmap); 3315 3316 } 3317 3318 /* 3319 * Return true if the pmap's pv is one of the first 16 pvs linked to from this 3320 * page. This count may be changed upwards or downwards in the future; it is 3321 * only necessary that true be returned for a small subset of pmaps for proper 3322 * page aging. 3323 */ 3324 static boolean_t 3325 mmu_booke_page_exists_quick(mmu_t mmu, pmap_t pmap, vm_page_t m) 3326 { 3327 pv_entry_t pv; 3328 int loops; 3329 boolean_t rv; 3330 3331 KASSERT((m->oflags & VPO_UNMANAGED) == 0, 3332 ("mmu_booke_page_exists_quick: page %p is not managed", m)); 3333 loops = 0; 3334 rv = FALSE; 3335 rw_wlock(&pvh_global_lock); 3336 TAILQ_FOREACH(pv, &m->md.pv_list, pv_link) { 3337 if (pv->pv_pmap == pmap) { 3338 rv = TRUE; 3339 break; 3340 } 3341 if (++loops >= 16) 3342 break; 3343 } 3344 rw_wunlock(&pvh_global_lock); 3345 return (rv); 3346 } 3347 3348 /* 3349 * Return the number of managed mappings to the given physical page that are 3350 * wired. 3351 */ 3352 static int 3353 mmu_booke_page_wired_mappings(mmu_t mmu, vm_page_t m) 3354 { 3355 pv_entry_t pv; 3356 pte_t *pte; 3357 int count = 0; 3358 3359 if ((m->oflags & VPO_UNMANAGED) != 0) 3360 return (count); 3361 rw_wlock(&pvh_global_lock); 3362 TAILQ_FOREACH(pv, &m->md.pv_list, pv_link) { 3363 PMAP_LOCK(pv->pv_pmap); 3364 if ((pte = pte_find(mmu, pv->pv_pmap, pv->pv_va)) != NULL) 3365 if (PTE_ISVALID(pte) && PTE_ISWIRED(pte)) 3366 count++; 3367 PMAP_UNLOCK(pv->pv_pmap); 3368 } 3369 rw_wunlock(&pvh_global_lock); 3370 return (count); 3371 } 3372 3373 static int 3374 mmu_booke_dev_direct_mapped(mmu_t mmu, vm_paddr_t pa, vm_size_t size) 3375 { 3376 int i; 3377 vm_offset_t va; 3378 3379 /* 3380 * This currently does not work for entries that 3381 * overlap TLB1 entries. 3382 */ 3383 for (i = 0; i < TLB1_ENTRIES; i ++) { 3384 if (tlb1_iomapped(i, pa, size, &va) == 0) 3385 return (0); 3386 } 3387 3388 return (EFAULT); 3389 } 3390 3391 void 3392 mmu_booke_dumpsys_map(mmu_t mmu, vm_paddr_t pa, size_t sz, void **va) 3393 { 3394 vm_paddr_t ppa; 3395 vm_offset_t ofs; 3396 vm_size_t gran; 3397 3398 /* Minidumps are based on virtual memory addresses. */ 3399 if (do_minidump) { 3400 *va = (void *)(vm_offset_t)pa; 3401 return; 3402 } 3403 3404 /* Raw physical memory dumps don't have a virtual address. */ 3405 /* We always map a 256MB page at 256M. */ 3406 gran = 256 * 1024 * 1024; 3407 ppa = rounddown2(pa, gran); 3408 ofs = pa - ppa; 3409 *va = (void *)gran; 3410 tlb1_set_entry((vm_offset_t)va, ppa, gran, _TLB_ENTRY_IO); 3411 3412 if (sz > (gran - ofs)) 3413 tlb1_set_entry((vm_offset_t)(va + gran), ppa + gran, gran, 3414 _TLB_ENTRY_IO); 3415 } 3416 3417 void 3418 mmu_booke_dumpsys_unmap(mmu_t mmu, vm_paddr_t pa, size_t sz, void *va) 3419 { 3420 vm_paddr_t ppa; 3421 vm_offset_t ofs; 3422 vm_size_t gran; 3423 tlb_entry_t e; 3424 int i; 3425 3426 /* Minidumps are based on virtual memory addresses. */ 3427 /* Nothing to do... */ 3428 if (do_minidump) 3429 return; 3430 3431 for (i = 0; i < TLB1_ENTRIES; i++) { 3432 tlb1_read_entry(&e, i); 3433 if (!(e.mas1 & MAS1_VALID)) 3434 break; 3435 } 3436 3437 /* Raw physical memory dumps don't have a virtual address. */ 3438 i--; 3439 e.mas1 = 0; 3440 e.mas2 = 0; 3441 e.mas3 = 0; 3442 tlb1_write_entry(&e, i); 3443 3444 gran = 256 * 1024 * 1024; 3445 ppa = rounddown2(pa, gran); 3446 ofs = pa - ppa; 3447 if (sz > (gran - ofs)) { 3448 i--; 3449 e.mas1 = 0; 3450 e.mas2 = 0; 3451 e.mas3 = 0; 3452 tlb1_write_entry(&e, i); 3453 } 3454 } 3455 3456 extern struct dump_pa dump_map[PHYS_AVAIL_SZ + 1]; 3457 3458 void 3459 mmu_booke_scan_init(mmu_t mmu) 3460 { 3461 vm_offset_t va; 3462 pte_t *pte; 3463 int i; 3464 3465 if (!do_minidump) { 3466 /* Initialize phys. segments for dumpsys(). */ 3467 memset(&dump_map, 0, sizeof(dump_map)); 3468 mem_regions(&physmem_regions, &physmem_regions_sz, &availmem_regions, 3469 &availmem_regions_sz); 3470 for (i = 0; i < physmem_regions_sz; i++) { 3471 dump_map[i].pa_start = physmem_regions[i].mr_start; 3472 dump_map[i].pa_size = physmem_regions[i].mr_size; 3473 } 3474 return; 3475 } 3476 3477 /* Virtual segments for minidumps: */ 3478 memset(&dump_map, 0, sizeof(dump_map)); 3479 3480 /* 1st: kernel .data and .bss. */ 3481 dump_map[0].pa_start = trunc_page((uintptr_t)_etext); 3482 dump_map[0].pa_size = 3483 round_page((uintptr_t)_end) - dump_map[0].pa_start; 3484 3485 /* 2nd: msgbuf and tables (see pmap_bootstrap()). */ 3486 dump_map[1].pa_start = data_start; 3487 dump_map[1].pa_size = data_end - data_start; 3488 3489 /* 3rd: kernel VM. */ 3490 va = dump_map[1].pa_start + dump_map[1].pa_size; 3491 /* Find start of next chunk (from va). */ 3492 while (va < virtual_end) { 3493 /* Don't dump the buffer cache. */ 3494 if (va >= kmi.buffer_sva && va < kmi.buffer_eva) { 3495 va = kmi.buffer_eva; 3496 continue; 3497 } 3498 pte = pte_find(mmu, kernel_pmap, va); 3499 if (pte != NULL && PTE_ISVALID(pte)) 3500 break; 3501 va += PAGE_SIZE; 3502 } 3503 if (va < virtual_end) { 3504 dump_map[2].pa_start = va; 3505 va += PAGE_SIZE; 3506 /* Find last page in chunk. */ 3507 while (va < virtual_end) { 3508 /* Don't run into the buffer cache. */ 3509 if (va == kmi.buffer_sva) 3510 break; 3511 pte = pte_find(mmu, kernel_pmap, va); 3512 if (pte == NULL || !PTE_ISVALID(pte)) 3513 break; 3514 va += PAGE_SIZE; 3515 } 3516 dump_map[2].pa_size = va - dump_map[2].pa_start; 3517 } 3518 } 3519 3520 /* 3521 * Map a set of physical memory pages into the kernel virtual address space. 3522 * Return a pointer to where it is mapped. This routine is intended to be used 3523 * for mapping device memory, NOT real memory. 3524 */ 3525 static void * 3526 mmu_booke_mapdev(mmu_t mmu, vm_paddr_t pa, vm_size_t size) 3527 { 3528 3529 return (mmu_booke_mapdev_attr(mmu, pa, size, VM_MEMATTR_DEFAULT)); 3530 } 3531 3532 static void * 3533 mmu_booke_mapdev_attr(mmu_t mmu, vm_paddr_t pa, vm_size_t size, vm_memattr_t ma) 3534 { 3535 tlb_entry_t e; 3536 void *res; 3537 uintptr_t va, tmpva; 3538 vm_size_t sz; 3539 int i; 3540 3541 /* 3542 * Check if this is premapped in TLB1. Note: this should probably also 3543 * check whether a sequence of TLB1 entries exist that match the 3544 * requirement, but now only checks the easy case. 3545 */ 3546 for (i = 0; i < TLB1_ENTRIES; i++) { 3547 tlb1_read_entry(&e, i); 3548 if (!(e.mas1 & MAS1_VALID)) 3549 continue; 3550 if (pa >= e.phys && 3551 (pa + size) <= (e.phys + e.size) && 3552 (ma == VM_MEMATTR_DEFAULT || 3553 tlb_calc_wimg(pa, ma) == 3554 (e.mas2 & (MAS2_WIMGE_MASK & ~_TLB_ENTRY_SHARED)))) 3555 return (void *)(e.virt + 3556 (vm_offset_t)(pa - e.phys)); 3557 } 3558 3559 size = roundup(size, PAGE_SIZE); 3560 3561 /* 3562 * The device mapping area is between VM_MAXUSER_ADDRESS and 3563 * VM_MIN_KERNEL_ADDRESS. This gives 1GB of device addressing. 3564 */ 3565 #ifdef SPARSE_MAPDEV 3566 /* 3567 * With a sparse mapdev, align to the largest starting region. This 3568 * could feasibly be optimized for a 'best-fit' alignment, but that 3569 * calculation could be very costly. 3570 * Align to the smaller of: 3571 * - first set bit in overlap of (pa & size mask) 3572 * - largest size envelope 3573 * 3574 * It's possible the device mapping may start at a PA that's not larger 3575 * than the size mask, so we need to offset in to maximize the TLB entry 3576 * range and minimize the number of used TLB entries. 3577 */ 3578 do { 3579 tmpva = tlb1_map_base; 3580 sz = ffsl(((1 << flsl(size-1)) - 1) & pa); 3581 sz = sz ? min(roundup(sz + 3, 4), flsl(size) - 1) : flsl(size) - 1; 3582 va = roundup(tlb1_map_base, 1 << sz) | (((1 << sz) - 1) & pa); 3583 #ifdef __powerpc64__ 3584 } while (!atomic_cmpset_long(&tlb1_map_base, tmpva, va + size)); 3585 #else 3586 } while (!atomic_cmpset_int(&tlb1_map_base, tmpva, va + size)); 3587 #endif 3588 #else 3589 #ifdef __powerpc64__ 3590 va = atomic_fetchadd_long(&tlb1_map_base, size); 3591 #else 3592 va = atomic_fetchadd_int(&tlb1_map_base, size); 3593 #endif 3594 #endif 3595 res = (void *)va; 3596 3597 do { 3598 sz = 1 << (ilog2(size) & ~1); 3599 /* Align size to PA */ 3600 if (pa % sz != 0) { 3601 do { 3602 sz >>= 2; 3603 } while (pa % sz != 0); 3604 } 3605 /* Now align from there to VA */ 3606 if (va % sz != 0) { 3607 do { 3608 sz >>= 2; 3609 } while (va % sz != 0); 3610 } 3611 if (bootverbose) 3612 printf("Wiring VA=%lx to PA=%jx (size=%lx)\n", 3613 va, (uintmax_t)pa, sz); 3614 if (tlb1_set_entry(va, pa, sz, 3615 _TLB_ENTRY_SHARED | tlb_calc_wimg(pa, ma)) < 0) 3616 return (NULL); 3617 size -= sz; 3618 pa += sz; 3619 va += sz; 3620 } while (size > 0); 3621 3622 return (res); 3623 } 3624 3625 /* 3626 * 'Unmap' a range mapped by mmu_booke_mapdev(). 3627 */ 3628 static void 3629 mmu_booke_unmapdev(mmu_t mmu, vm_offset_t va, vm_size_t size) 3630 { 3631 #ifdef SUPPORTS_SHRINKING_TLB1 3632 vm_offset_t base, offset; 3633 3634 /* 3635 * Unmap only if this is inside kernel virtual space. 3636 */ 3637 if ((va >= VM_MIN_KERNEL_ADDRESS) && (va <= VM_MAX_KERNEL_ADDRESS)) { 3638 base = trunc_page(va); 3639 offset = va & PAGE_MASK; 3640 size = roundup(offset + size, PAGE_SIZE); 3641 kva_free(base, size); 3642 } 3643 #endif 3644 } 3645 3646 /* 3647 * mmu_booke_object_init_pt preloads the ptes for a given object into the 3648 * specified pmap. This eliminates the blast of soft faults on process startup 3649 * and immediately after an mmap. 3650 */ 3651 static void 3652 mmu_booke_object_init_pt(mmu_t mmu, pmap_t pmap, vm_offset_t addr, 3653 vm_object_t object, vm_pindex_t pindex, vm_size_t size) 3654 { 3655 3656 VM_OBJECT_ASSERT_WLOCKED(object); 3657 KASSERT(object->type == OBJT_DEVICE || object->type == OBJT_SG, 3658 ("mmu_booke_object_init_pt: non-device object")); 3659 } 3660 3661 /* 3662 * Perform the pmap work for mincore. 3663 */ 3664 static int 3665 mmu_booke_mincore(mmu_t mmu, pmap_t pmap, vm_offset_t addr, 3666 vm_paddr_t *locked_pa) 3667 { 3668 3669 /* XXX: this should be implemented at some point */ 3670 return (0); 3671 } 3672 3673 static int 3674 mmu_booke_change_attr(mmu_t mmu, vm_offset_t addr, vm_size_t sz, 3675 vm_memattr_t mode) 3676 { 3677 vm_offset_t va; 3678 pte_t *pte; 3679 int i, j; 3680 tlb_entry_t e; 3681 3682 /* Check TLB1 mappings */ 3683 for (i = 0; i < TLB1_ENTRIES; i++) { 3684 tlb1_read_entry(&e, i); 3685 if (!(e.mas1 & MAS1_VALID)) 3686 continue; 3687 if (addr >= e.virt && addr < e.virt + e.size) 3688 break; 3689 } 3690 if (i < TLB1_ENTRIES) { 3691 /* Only allow full mappings to be modified for now. */ 3692 /* Validate the range. */ 3693 for (j = i, va = addr; va < addr + sz; va += e.size, j++) { 3694 tlb1_read_entry(&e, j); 3695 if (va != e.virt || (sz - (va - addr) < e.size)) 3696 return (EINVAL); 3697 } 3698 for (va = addr; va < addr + sz; va += e.size, i++) { 3699 tlb1_read_entry(&e, i); 3700 e.mas2 &= ~MAS2_WIMGE_MASK; 3701 e.mas2 |= tlb_calc_wimg(e.phys, mode); 3702 3703 /* 3704 * Write it out to the TLB. Should really re-sync with other 3705 * cores. 3706 */ 3707 tlb1_write_entry(&e, i); 3708 } 3709 return (0); 3710 } 3711 3712 /* Not in TLB1, try through pmap */ 3713 /* First validate the range. */ 3714 for (va = addr; va < addr + sz; va += PAGE_SIZE) { 3715 pte = pte_find(mmu, kernel_pmap, va); 3716 if (pte == NULL || !PTE_ISVALID(pte)) 3717 return (EINVAL); 3718 } 3719 3720 mtx_lock_spin(&tlbivax_mutex); 3721 tlb_miss_lock(); 3722 for (va = addr; va < addr + sz; va += PAGE_SIZE) { 3723 pte = pte_find(mmu, kernel_pmap, va); 3724 *pte &= ~(PTE_MAS2_MASK << PTE_MAS2_SHIFT); 3725 *pte |= tlb_calc_wimg(PTE_PA(pte), mode) << PTE_MAS2_SHIFT; 3726 tlb0_flush_entry(va); 3727 } 3728 tlb_miss_unlock(); 3729 mtx_unlock_spin(&tlbivax_mutex); 3730 3731 return (0); 3732 } 3733 3734 /**************************************************************************/ 3735 /* TID handling */ 3736 /**************************************************************************/ 3737 3738 /* 3739 * Allocate a TID. If necessary, steal one from someone else. 3740 * The new TID is flushed from the TLB before returning. 3741 */ 3742 static tlbtid_t 3743 tid_alloc(pmap_t pmap) 3744 { 3745 tlbtid_t tid; 3746 int thiscpu; 3747 3748 KASSERT((pmap != kernel_pmap), ("tid_alloc: kernel pmap")); 3749 3750 CTR2(KTR_PMAP, "%s: s (pmap = %p)", __func__, pmap); 3751 3752 thiscpu = PCPU_GET(cpuid); 3753 3754 tid = PCPU_GET(booke.tid_next); 3755 if (tid > TID_MAX) 3756 tid = TID_MIN; 3757 PCPU_SET(booke.tid_next, tid + 1); 3758 3759 /* If we are stealing TID then clear the relevant pmap's field */ 3760 if (tidbusy[thiscpu][tid] != NULL) { 3761 3762 CTR2(KTR_PMAP, "%s: warning: stealing tid %d", __func__, tid); 3763 3764 tidbusy[thiscpu][tid]->pm_tid[thiscpu] = TID_NONE; 3765 3766 /* Flush all entries from TLB0 matching this TID. */ 3767 tid_flush(tid); 3768 } 3769 3770 tidbusy[thiscpu][tid] = pmap; 3771 pmap->pm_tid[thiscpu] = tid; 3772 __asm __volatile("msync; isync"); 3773 3774 CTR3(KTR_PMAP, "%s: e (%02d next = %02d)", __func__, tid, 3775 PCPU_GET(booke.tid_next)); 3776 3777 return (tid); 3778 } 3779 3780 /**************************************************************************/ 3781 /* TLB0 handling */ 3782 /**************************************************************************/ 3783 3784 /* Convert TLB0 va and way number to tlb0[] table index. */ 3785 static inline unsigned int 3786 tlb0_tableidx(vm_offset_t va, unsigned int way) 3787 { 3788 unsigned int idx; 3789 3790 idx = (way * TLB0_ENTRIES_PER_WAY); 3791 idx += (va & MAS2_TLB0_ENTRY_IDX_MASK) >> MAS2_TLB0_ENTRY_IDX_SHIFT; 3792 return (idx); 3793 } 3794 3795 /* 3796 * Invalidate TLB0 entry. 3797 */ 3798 static inline void 3799 tlb0_flush_entry(vm_offset_t va) 3800 { 3801 3802 CTR2(KTR_PMAP, "%s: s va=0x%08x", __func__, va); 3803 3804 mtx_assert(&tlbivax_mutex, MA_OWNED); 3805 3806 __asm __volatile("tlbivax 0, %0" :: "r"(va & MAS2_EPN_MASK)); 3807 __asm __volatile("isync; msync"); 3808 __asm __volatile("tlbsync; msync"); 3809 3810 CTR1(KTR_PMAP, "%s: e", __func__); 3811 } 3812 3813 3814 /**************************************************************************/ 3815 /* TLB1 handling */ 3816 /**************************************************************************/ 3817 3818 /* 3819 * TLB1 mapping notes: 3820 * 3821 * TLB1[0] Kernel text and data. 3822 * TLB1[1-15] Additional kernel text and data mappings (if required), PCI 3823 * windows, other devices mappings. 3824 */ 3825 3826 /* 3827 * Read an entry from given TLB1 slot. 3828 */ 3829 void 3830 tlb1_read_entry(tlb_entry_t *entry, unsigned int slot) 3831 { 3832 register_t msr; 3833 uint32_t mas0; 3834 3835 KASSERT((entry != NULL), ("%s(): Entry is NULL!", __func__)); 3836 3837 msr = mfmsr(); 3838 __asm __volatile("wrteei 0"); 3839 3840 mas0 = MAS0_TLBSEL(1) | MAS0_ESEL(slot); 3841 mtspr(SPR_MAS0, mas0); 3842 __asm __volatile("isync; tlbre"); 3843 3844 entry->mas1 = mfspr(SPR_MAS1); 3845 entry->mas2 = mfspr(SPR_MAS2); 3846 entry->mas3 = mfspr(SPR_MAS3); 3847 3848 switch ((mfpvr() >> 16) & 0xFFFF) { 3849 case FSL_E500v2: 3850 case FSL_E500mc: 3851 case FSL_E5500: 3852 case FSL_E6500: 3853 entry->mas7 = mfspr(SPR_MAS7); 3854 break; 3855 default: 3856 entry->mas7 = 0; 3857 break; 3858 } 3859 mtmsr(msr); 3860 3861 entry->virt = entry->mas2 & MAS2_EPN_MASK; 3862 entry->phys = ((vm_paddr_t)(entry->mas7 & MAS7_RPN) << 32) | 3863 (entry->mas3 & MAS3_RPN); 3864 entry->size = 3865 tsize2size((entry->mas1 & MAS1_TSIZE_MASK) >> MAS1_TSIZE_SHIFT); 3866 } 3867 3868 struct tlbwrite_args { 3869 tlb_entry_t *e; 3870 unsigned int idx; 3871 }; 3872 3873 static void 3874 tlb1_write_entry_int(void *arg) 3875 { 3876 struct tlbwrite_args *args = arg; 3877 uint32_t mas0; 3878 3879 /* Select entry */ 3880 mas0 = MAS0_TLBSEL(1) | MAS0_ESEL(args->idx); 3881 3882 mtspr(SPR_MAS0, mas0); 3883 __asm __volatile("isync"); 3884 mtspr(SPR_MAS1, args->e->mas1); 3885 __asm __volatile("isync"); 3886 mtspr(SPR_MAS2, args->e->mas2); 3887 __asm __volatile("isync"); 3888 mtspr(SPR_MAS3, args->e->mas3); 3889 __asm __volatile("isync"); 3890 switch ((mfpvr() >> 16) & 0xFFFF) { 3891 case FSL_E500mc: 3892 case FSL_E5500: 3893 case FSL_E6500: 3894 mtspr(SPR_MAS8, 0); 3895 __asm __volatile("isync"); 3896 /* FALLTHROUGH */ 3897 case FSL_E500v2: 3898 mtspr(SPR_MAS7, args->e->mas7); 3899 __asm __volatile("isync"); 3900 break; 3901 default: 3902 break; 3903 } 3904 3905 __asm __volatile("tlbwe; isync; msync"); 3906 3907 } 3908 3909 static void 3910 tlb1_write_entry_sync(void *arg) 3911 { 3912 /* Empty synchronization point for smp_rendezvous(). */ 3913 } 3914 3915 /* 3916 * Write given entry to TLB1 hardware. 3917 */ 3918 static void 3919 tlb1_write_entry(tlb_entry_t *e, unsigned int idx) 3920 { 3921 struct tlbwrite_args args; 3922 3923 args.e = e; 3924 args.idx = idx; 3925 3926 #ifdef SMP 3927 if ((e->mas2 & _TLB_ENTRY_SHARED) && smp_started) { 3928 mb(); 3929 smp_rendezvous(tlb1_write_entry_sync, 3930 tlb1_write_entry_int, 3931 tlb1_write_entry_sync, &args); 3932 } else 3933 #endif 3934 { 3935 register_t msr; 3936 3937 msr = mfmsr(); 3938 __asm __volatile("wrteei 0"); 3939 tlb1_write_entry_int(&args); 3940 mtmsr(msr); 3941 } 3942 } 3943 3944 /* 3945 * Return the largest uint value log such that 2^log <= num. 3946 */ 3947 static unsigned int 3948 ilog2(unsigned long num) 3949 { 3950 long lz; 3951 3952 #ifdef __powerpc64__ 3953 __asm ("cntlzd %0, %1" : "=r" (lz) : "r" (num)); 3954 return (63 - lz); 3955 #else 3956 __asm ("cntlzw %0, %1" : "=r" (lz) : "r" (num)); 3957 return (31 - lz); 3958 #endif 3959 } 3960 3961 /* 3962 * Convert TLB TSIZE value to mapped region size. 3963 */ 3964 static vm_size_t 3965 tsize2size(unsigned int tsize) 3966 { 3967 3968 /* 3969 * size = 4^tsize KB 3970 * size = 4^tsize * 2^10 = 2^(2 * tsize - 10) 3971 */ 3972 3973 return ((1 << (2 * tsize)) * 1024); 3974 } 3975 3976 /* 3977 * Convert region size (must be power of 4) to TLB TSIZE value. 3978 */ 3979 static unsigned int 3980 size2tsize(vm_size_t size) 3981 { 3982 3983 return (ilog2(size) / 2 - 5); 3984 } 3985 3986 /* 3987 * Register permanent kernel mapping in TLB1. 3988 * 3989 * Entries are created starting from index 0 (current free entry is 3990 * kept in tlb1_idx) and are not supposed to be invalidated. 3991 */ 3992 int 3993 tlb1_set_entry(vm_offset_t va, vm_paddr_t pa, vm_size_t size, 3994 uint32_t flags) 3995 { 3996 tlb_entry_t e; 3997 uint32_t ts, tid; 3998 int tsize, index; 3999 4000 for (index = 0; index < TLB1_ENTRIES; index++) { 4001 tlb1_read_entry(&e, index); 4002 if ((e.mas1 & MAS1_VALID) == 0) 4003 break; 4004 /* Check if we're just updating the flags, and update them. */ 4005 if (e.phys == pa && e.virt == va && e.size == size) { 4006 e.mas2 = (va & MAS2_EPN_MASK) | flags; 4007 tlb1_write_entry(&e, index); 4008 return (0); 4009 } 4010 } 4011 if (index >= TLB1_ENTRIES) { 4012 printf("tlb1_set_entry: TLB1 full!\n"); 4013 return (-1); 4014 } 4015 4016 /* Convert size to TSIZE */ 4017 tsize = size2tsize(size); 4018 4019 tid = (TID_KERNEL << MAS1_TID_SHIFT) & MAS1_TID_MASK; 4020 /* XXX TS is hard coded to 0 for now as we only use single address space */ 4021 ts = (0 << MAS1_TS_SHIFT) & MAS1_TS_MASK; 4022 4023 e.phys = pa; 4024 e.virt = va; 4025 e.size = size; 4026 e.mas1 = MAS1_VALID | MAS1_IPROT | ts | tid; 4027 e.mas1 |= ((tsize << MAS1_TSIZE_SHIFT) & MAS1_TSIZE_MASK); 4028 e.mas2 = (va & MAS2_EPN_MASK) | flags; 4029 4030 /* Set supervisor RWX permission bits */ 4031 e.mas3 = (pa & MAS3_RPN) | MAS3_SR | MAS3_SW | MAS3_SX; 4032 e.mas7 = (pa >> 32) & MAS7_RPN; 4033 4034 tlb1_write_entry(&e, index); 4035 4036 /* 4037 * XXX in general TLB1 updates should be propagated between CPUs, 4038 * since current design assumes to have the same TLB1 set-up on all 4039 * cores. 4040 */ 4041 return (0); 4042 } 4043 4044 /* 4045 * Map in contiguous RAM region into the TLB1 using maximum of 4046 * KERNEL_REGION_MAX_TLB_ENTRIES entries. 4047 * 4048 * If necessary round up last entry size and return total size 4049 * used by all allocated entries. 4050 */ 4051 vm_size_t 4052 tlb1_mapin_region(vm_offset_t va, vm_paddr_t pa, vm_size_t size) 4053 { 4054 vm_size_t pgs[KERNEL_REGION_MAX_TLB_ENTRIES]; 4055 vm_size_t mapped, pgsz, base, mask; 4056 int idx, nents; 4057 4058 /* Round up to the next 1M */ 4059 size = roundup2(size, 1 << 20); 4060 4061 mapped = 0; 4062 idx = 0; 4063 base = va; 4064 pgsz = 64*1024*1024; 4065 while (mapped < size) { 4066 while (mapped < size && idx < KERNEL_REGION_MAX_TLB_ENTRIES) { 4067 while (pgsz > (size - mapped)) 4068 pgsz >>= 2; 4069 pgs[idx++] = pgsz; 4070 mapped += pgsz; 4071 } 4072 4073 /* We under-map. Correct for this. */ 4074 if (mapped < size) { 4075 while (pgs[idx - 1] == pgsz) { 4076 idx--; 4077 mapped -= pgsz; 4078 } 4079 /* XXX We may increase beyond out starting point. */ 4080 pgsz <<= 2; 4081 pgs[idx++] = pgsz; 4082 mapped += pgsz; 4083 } 4084 } 4085 4086 nents = idx; 4087 mask = pgs[0] - 1; 4088 /* Align address to the boundary */ 4089 if (va & mask) { 4090 va = (va + mask) & ~mask; 4091 pa = (pa + mask) & ~mask; 4092 } 4093 4094 for (idx = 0; idx < nents; idx++) { 4095 pgsz = pgs[idx]; 4096 debugf("%u: %llx -> %jx, size=%jx\n", idx, pa, 4097 (uintmax_t)va, (uintmax_t)pgsz); 4098 tlb1_set_entry(va, pa, pgsz, 4099 _TLB_ENTRY_SHARED | _TLB_ENTRY_MEM); 4100 pa += pgsz; 4101 va += pgsz; 4102 } 4103 4104 mapped = (va - base); 4105 if (bootverbose) 4106 printf("mapped size 0x%"PRIxPTR" (wasted space 0x%"PRIxPTR")\n", 4107 mapped, mapped - size); 4108 return (mapped); 4109 } 4110 4111 /* 4112 * TLB1 initialization routine, to be called after the very first 4113 * assembler level setup done in locore.S. 4114 */ 4115 void 4116 tlb1_init() 4117 { 4118 uint32_t mas0, mas1, mas2, mas3, mas7; 4119 uint32_t tsz; 4120 4121 tlb1_get_tlbconf(); 4122 4123 mas0 = MAS0_TLBSEL(1) | MAS0_ESEL(0); 4124 mtspr(SPR_MAS0, mas0); 4125 __asm __volatile("isync; tlbre"); 4126 4127 mas1 = mfspr(SPR_MAS1); 4128 mas2 = mfspr(SPR_MAS2); 4129 mas3 = mfspr(SPR_MAS3); 4130 mas7 = mfspr(SPR_MAS7); 4131 4132 kernload = ((vm_paddr_t)(mas7 & MAS7_RPN) << 32) | 4133 (mas3 & MAS3_RPN); 4134 4135 tsz = (mas1 & MAS1_TSIZE_MASK) >> MAS1_TSIZE_SHIFT; 4136 kernsize += (tsz > 0) ? tsize2size(tsz) : 0; 4137 4138 /* Setup TLB miss defaults */ 4139 set_mas4_defaults(); 4140 } 4141 4142 /* 4143 * pmap_early_io_unmap() should be used in short conjunction with 4144 * pmap_early_io_map(), as in the following snippet: 4145 * 4146 * x = pmap_early_io_map(...); 4147 * <do something with x> 4148 * pmap_early_io_unmap(x, size); 4149 * 4150 * And avoiding more allocations between. 4151 */ 4152 void 4153 pmap_early_io_unmap(vm_offset_t va, vm_size_t size) 4154 { 4155 int i; 4156 tlb_entry_t e; 4157 vm_size_t isize; 4158 4159 size = roundup(size, PAGE_SIZE); 4160 isize = size; 4161 for (i = 0; i < TLB1_ENTRIES && size > 0; i++) { 4162 tlb1_read_entry(&e, i); 4163 if (!(e.mas1 & MAS1_VALID)) 4164 continue; 4165 if (va <= e.virt && (va + isize) >= (e.virt + e.size)) { 4166 size -= e.size; 4167 e.mas1 &= ~MAS1_VALID; 4168 tlb1_write_entry(&e, i); 4169 } 4170 } 4171 if (tlb1_map_base == va + isize) 4172 tlb1_map_base -= isize; 4173 } 4174 4175 vm_offset_t 4176 pmap_early_io_map(vm_paddr_t pa, vm_size_t size) 4177 { 4178 vm_paddr_t pa_base; 4179 vm_offset_t va, sz; 4180 int i; 4181 tlb_entry_t e; 4182 4183 KASSERT(!pmap_bootstrapped, ("Do not use after PMAP is up!")); 4184 4185 for (i = 0; i < TLB1_ENTRIES; i++) { 4186 tlb1_read_entry(&e, i); 4187 if (!(e.mas1 & MAS1_VALID)) 4188 continue; 4189 if (pa >= e.phys && (pa + size) <= 4190 (e.phys + e.size)) 4191 return (e.virt + (pa - e.phys)); 4192 } 4193 4194 pa_base = rounddown(pa, PAGE_SIZE); 4195 size = roundup(size + (pa - pa_base), PAGE_SIZE); 4196 tlb1_map_base = roundup2(tlb1_map_base, 1 << (ilog2(size) & ~1)); 4197 va = tlb1_map_base + (pa - pa_base); 4198 4199 do { 4200 sz = 1 << (ilog2(size) & ~1); 4201 tlb1_set_entry(tlb1_map_base, pa_base, sz, 4202 _TLB_ENTRY_SHARED | _TLB_ENTRY_IO); 4203 size -= sz; 4204 pa_base += sz; 4205 tlb1_map_base += sz; 4206 } while (size > 0); 4207 4208 return (va); 4209 } 4210 4211 void 4212 pmap_track_page(pmap_t pmap, vm_offset_t va) 4213 { 4214 vm_paddr_t pa; 4215 vm_page_t page; 4216 struct pv_entry *pve; 4217 4218 va = trunc_page(va); 4219 pa = pmap_kextract(va); 4220 page = PHYS_TO_VM_PAGE(pa); 4221 4222 rw_wlock(&pvh_global_lock); 4223 PMAP_LOCK(pmap); 4224 4225 TAILQ_FOREACH(pve, &page->md.pv_list, pv_link) { 4226 if ((pmap == pve->pv_pmap) && (va == pve->pv_va)) { 4227 goto out; 4228 } 4229 } 4230 page->md.pv_tracked = true; 4231 pv_insert(pmap, va, page); 4232 out: 4233 PMAP_UNLOCK(pmap); 4234 rw_wunlock(&pvh_global_lock); 4235 } 4236 4237 4238 /* 4239 * Setup MAS4 defaults. 4240 * These values are loaded to MAS0-2 on a TLB miss. 4241 */ 4242 static void 4243 set_mas4_defaults(void) 4244 { 4245 uint32_t mas4; 4246 4247 /* Defaults: TLB0, PID0, TSIZED=4K */ 4248 mas4 = MAS4_TLBSELD0; 4249 mas4 |= (TLB_SIZE_4K << MAS4_TSIZED_SHIFT) & MAS4_TSIZED_MASK; 4250 #ifdef SMP 4251 mas4 |= MAS4_MD; 4252 #endif 4253 mtspr(SPR_MAS4, mas4); 4254 __asm __volatile("isync"); 4255 } 4256 4257 4258 /* 4259 * Return 0 if the physical IO range is encompassed by one of the 4260 * the TLB1 entries, otherwise return related error code. 4261 */ 4262 static int 4263 tlb1_iomapped(int i, vm_paddr_t pa, vm_size_t size, vm_offset_t *va) 4264 { 4265 uint32_t prot; 4266 vm_paddr_t pa_start; 4267 vm_paddr_t pa_end; 4268 unsigned int entry_tsize; 4269 vm_size_t entry_size; 4270 tlb_entry_t e; 4271 4272 *va = (vm_offset_t)NULL; 4273 4274 tlb1_read_entry(&e, i); 4275 /* Skip invalid entries */ 4276 if (!(e.mas1 & MAS1_VALID)) 4277 return (EINVAL); 4278 4279 /* 4280 * The entry must be cache-inhibited, guarded, and r/w 4281 * so it can function as an i/o page 4282 */ 4283 prot = e.mas2 & (MAS2_I | MAS2_G); 4284 if (prot != (MAS2_I | MAS2_G)) 4285 return (EPERM); 4286 4287 prot = e.mas3 & (MAS3_SR | MAS3_SW); 4288 if (prot != (MAS3_SR | MAS3_SW)) 4289 return (EPERM); 4290 4291 /* The address should be within the entry range. */ 4292 entry_tsize = (e.mas1 & MAS1_TSIZE_MASK) >> MAS1_TSIZE_SHIFT; 4293 KASSERT((entry_tsize), ("tlb1_iomapped: invalid entry tsize")); 4294 4295 entry_size = tsize2size(entry_tsize); 4296 pa_start = (((vm_paddr_t)e.mas7 & MAS7_RPN) << 32) | 4297 (e.mas3 & MAS3_RPN); 4298 pa_end = pa_start + entry_size; 4299 4300 if ((pa < pa_start) || ((pa + size) > pa_end)) 4301 return (ERANGE); 4302 4303 /* Return virtual address of this mapping. */ 4304 *va = (e.mas2 & MAS2_EPN_MASK) + (pa - pa_start); 4305 return (0); 4306 } 4307 4308 /* 4309 * Invalidate all TLB0 entries which match the given TID. Note this is 4310 * dedicated for cases when invalidations should NOT be propagated to other 4311 * CPUs. 4312 */ 4313 static void 4314 tid_flush(tlbtid_t tid) 4315 { 4316 register_t msr; 4317 uint32_t mas0, mas1, mas2; 4318 int entry, way; 4319 4320 4321 /* Don't evict kernel translations */ 4322 if (tid == TID_KERNEL) 4323 return; 4324 4325 msr = mfmsr(); 4326 __asm __volatile("wrteei 0"); 4327 4328 for (way = 0; way < TLB0_WAYS; way++) 4329 for (entry = 0; entry < TLB0_ENTRIES_PER_WAY; entry++) { 4330 4331 mas0 = MAS0_TLBSEL(0) | MAS0_ESEL(way); 4332 mtspr(SPR_MAS0, mas0); 4333 __asm __volatile("isync"); 4334 4335 mas2 = entry << MAS2_TLB0_ENTRY_IDX_SHIFT; 4336 mtspr(SPR_MAS2, mas2); 4337 4338 __asm __volatile("isync; tlbre"); 4339 4340 mas1 = mfspr(SPR_MAS1); 4341 4342 if (!(mas1 & MAS1_VALID)) 4343 continue; 4344 if (((mas1 & MAS1_TID_MASK) >> MAS1_TID_SHIFT) != tid) 4345 continue; 4346 mas1 &= ~MAS1_VALID; 4347 mtspr(SPR_MAS1, mas1); 4348 __asm __volatile("isync; tlbwe; isync; msync"); 4349 } 4350 mtmsr(msr); 4351 } 4352 4353 #ifdef DDB 4354 /* Print out contents of the MAS registers for each TLB0 entry */ 4355 static void 4356 #ifdef __powerpc64__ 4357 tlb_print_entry(int i, uint32_t mas1, uint64_t mas2, uint32_t mas3, 4358 #else 4359 tlb_print_entry(int i, uint32_t mas1, uint32_t mas2, uint32_t mas3, 4360 #endif 4361 uint32_t mas7) 4362 { 4363 int as; 4364 char desc[3]; 4365 tlbtid_t tid; 4366 vm_size_t size; 4367 unsigned int tsize; 4368 4369 desc[2] = '\0'; 4370 if (mas1 & MAS1_VALID) 4371 desc[0] = 'V'; 4372 else 4373 desc[0] = ' '; 4374 4375 if (mas1 & MAS1_IPROT) 4376 desc[1] = 'P'; 4377 else 4378 desc[1] = ' '; 4379 4380 as = (mas1 & MAS1_TS_MASK) ? 1 : 0; 4381 tid = MAS1_GETTID(mas1); 4382 4383 tsize = (mas1 & MAS1_TSIZE_MASK) >> MAS1_TSIZE_SHIFT; 4384 size = 0; 4385 if (tsize) 4386 size = tsize2size(tsize); 4387 4388 printf("%3d: (%s) [AS=%d] " 4389 "sz = 0x%08x tsz = %d tid = %d mas1 = 0x%08x " 4390 "mas2(va) = 0x%"PRI0ptrX" mas3(pa) = 0x%08x mas7 = 0x%08x\n", 4391 i, desc, as, size, tsize, tid, mas1, mas2, mas3, mas7); 4392 } 4393 4394 DB_SHOW_COMMAND(tlb0, tlb0_print_tlbentries) 4395 { 4396 uint32_t mas0, mas1, mas3, mas7; 4397 #ifdef __powerpc64__ 4398 uint64_t mas2; 4399 #else 4400 uint32_t mas2; 4401 #endif 4402 int entryidx, way, idx; 4403 4404 printf("TLB0 entries:\n"); 4405 for (way = 0; way < TLB0_WAYS; way ++) 4406 for (entryidx = 0; entryidx < TLB0_ENTRIES_PER_WAY; entryidx++) { 4407 4408 mas0 = MAS0_TLBSEL(0) | MAS0_ESEL(way); 4409 mtspr(SPR_MAS0, mas0); 4410 __asm __volatile("isync"); 4411 4412 mas2 = entryidx << MAS2_TLB0_ENTRY_IDX_SHIFT; 4413 mtspr(SPR_MAS2, mas2); 4414 4415 __asm __volatile("isync; tlbre"); 4416 4417 mas1 = mfspr(SPR_MAS1); 4418 mas2 = mfspr(SPR_MAS2); 4419 mas3 = mfspr(SPR_MAS3); 4420 mas7 = mfspr(SPR_MAS7); 4421 4422 idx = tlb0_tableidx(mas2, way); 4423 tlb_print_entry(idx, mas1, mas2, mas3, mas7); 4424 } 4425 } 4426 4427 /* 4428 * Print out contents of the MAS registers for each TLB1 entry 4429 */ 4430 DB_SHOW_COMMAND(tlb1, tlb1_print_tlbentries) 4431 { 4432 uint32_t mas0, mas1, mas3, mas7; 4433 #ifdef __powerpc64__ 4434 uint64_t mas2; 4435 #else 4436 uint32_t mas2; 4437 #endif 4438 int i; 4439 4440 printf("TLB1 entries:\n"); 4441 for (i = 0; i < TLB1_ENTRIES; i++) { 4442 4443 mas0 = MAS0_TLBSEL(1) | MAS0_ESEL(i); 4444 mtspr(SPR_MAS0, mas0); 4445 4446 __asm __volatile("isync; tlbre"); 4447 4448 mas1 = mfspr(SPR_MAS1); 4449 mas2 = mfspr(SPR_MAS2); 4450 mas3 = mfspr(SPR_MAS3); 4451 mas7 = mfspr(SPR_MAS7); 4452 4453 tlb_print_entry(i, mas1, mas2, mas3, mas7); 4454 } 4455 } 4456 #endif 4457