osfmk/arm/pmap.h

   1 /*
   2  *
   3  * Copyright (c) 2007-2016 Apple Inc. All rights reserved.
   4  *
   5  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   6  *
   7  * This file contains Original Code and/or Modifications of Original Code
   8  * as defined in and that are subject to the Apple Public Source License
   9  * Version 2.0 (the 'License'). You may not use this file except in
  10  * compliance with the License. The rights granted to you under the License
  11  * may not be used to create, or enable the creation or redistribution of,
  12  * unlawful or unlicensed copies of an Apple operating system, or to
  13  * circumvent, violate, or enable the circumvention or violation of, any
  14  * terms of an Apple operating system software license agreement.
  15  *
  16  * Please obtain a copy of the License at
  17  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  18  *
  19  * The Original Code and all software distributed under the License are
  20  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  21  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  22  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  23  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  24  * Please see the License for the specific language governing rights and
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  27  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  28  */
  29 #ifndef _ARM_PMAP_H_
  30 #define _ARM_PMAP_H_    1
  31
  32 #include <mach_assert.h>
  33
  34 #include <arm/proc_reg.h>
  35 #if defined(__arm64__)
  36 #include <arm64/proc_reg.h>
  37 #endif
  38
  39 /*
  40  *      Machine-dependent structures for the physical map module.
  41  */
  42
  43 #ifndef ASSEMBLER
  44
  45 #include <mach/kern_return.h>
  46 #include <mach/machine/vm_types.h>
  47 #include <mach/vm_prot.h>
  48 #include <mach/vm_statistics.h>
  49 #include <mach/machine/vm_param.h>
  50 #include <kern/kern_types.h>
  51 #include <kern/thread.h>
  52 #include <kern/queue.h>
  53
  54 /* Base address for low globals. */
  55 #define LOW_GLOBAL_BASE_ADDRESS 0xfffffff000000000ULL
  56
  57 /*
  58  * This indicates (roughly) where there is free space for the VM
  59  * to use for the heap; this does not need to be precise.
  60  */
  61 #if __ARM64_PMAP_SUBPAGE_L1__ && __ARM_16K_PG__
  62 #define KERNEL_PMAP_HEAP_RANGE_START VM_MIN_KERNEL_AND_KEXT_ADDRESS
  63 #else
  64 #define KERNEL_PMAP_HEAP_RANGE_START LOW_GLOBAL_BASE_ADDRESS
  65 #endif
  66
  67 #if defined(__arm64__)
  68
  69 typedef uint64_t        tt_entry_t;                                     /* translation table entry type */
  70 #define TT_ENTRY_NULL    ((tt_entry_t *) 0)
  71
  72 typedef uint64_t        pt_entry_t;                                     /* page table entry type */
  73 #define PT_ENTRY_NULL    ((pt_entry_t *) 0)
  74
  75 typedef uint64_t        pmap_paddr_t;                           /* physical address (not ppnum_t) */
  76
  77 #elif defined(__arm__)
  78
  79 typedef uint32_t         tt_entry_t;                            /* translation table entry type */
  80 #define PT_ENTRY_NULL    ((pt_entry_t *) 0)
  81
  82 typedef uint32_t        pt_entry_t;                                     /* page table entry type */
  83 #define TT_ENTRY_NULL    ((tt_entry_t *) 0)
  84
  85 typedef  uint32_t       pmap_paddr_t;                   /* physical address (not ppnum_t) */
  86
  87 #else
  88 #error unknown arch
  89 #endif
  90
  91
  92 /* superpages */
  93 #define SUPERPAGE_NBASEPAGES 1  /* No superpages support */
  94
  95 /*
  96  *      Convert addresses to pages and vice versa.
  97  *      No rounding is used.
  98  */
  99 #define arm_atop(x)         (((vm_map_address_t)(x)) >> ARM_PGSHIFT)
 100 #define arm_ptoa(x)         (((vm_map_address_t)(x)) << ARM_PGSHIFT)
 101
 102 /*
 103  *      Round off or truncate to the nearest page.  These will work
 104  *      for either addresses or counts.  (i.e. 1 byte rounds to 1 page
 105  *      bytes.
 106  */
 107 #define arm_round_page(x)   \
 108         ((((vm_map_address_t)(x)) + ARM_PGMASK) & ~ARM_PGMASK)
 109 #define arm_trunc_page(x)   (((vm_map_address_t)(x)) & ~ARM_PGMASK)
 110
 111 /* Convert address offset to page table index */
 112 #define ptenum(a) ((((a) & ARM_TT_LEAF_INDEX_MASK) >> ARM_TT_LEAF_SHIFT))
 113
 114 /*
 115  * For setups where the kernel page size does not match the hardware
 116  * page size (assumably, the kernel page size must be a multiple of
 117  * the hardware page size), we will need to determine what the page
 118  * ratio is.
 119  */
 120 #define PAGE_RATIO                      ((1 << PAGE_SHIFT) >> ARM_PGSHIFT)
 121 #define TEST_PAGE_RATIO_4       (PAGE_RATIO == 4)
 122
 123 #if (__ARM_VMSA__ <= 7)
 124 #define NTTES   (ARM_PGBYTES / sizeof(tt_entry_t))
 125 #define NPTES   ((ARM_PGBYTES/4) /sizeof(pt_entry_t))
 126 #else
 127 #define NTTES   (ARM_PGBYTES / sizeof(tt_entry_t))
 128 #define NPTES   (ARM_PGBYTES / sizeof(pt_entry_t))
 129 #endif
 130
 131 extern void flush_mmu_tlb(void);
 132 extern void flush_core_tlb(void);
 133 #if defined(__arm64__)
 134 extern void flush_mmu_tlb_allentries(uint64_t, uint64_t);
 135 extern void flush_mmu_tlb_entry(uint64_t);
 136 extern void flush_mmu_tlb_entries(uint64_t, uint64_t);
 137 extern void flush_mmu_tlb_asid(uint64_t);
 138 extern void flush_core_tlb_asid(uint64_t);
 139 /*
 140  * TLBI appers to only deal in 4KB page addresses, so give
 141  * it an explicit shift of 12.
 142  */
 143 #define TLBI_ADDR_SIZE 44
 144 #define TLBI_ADDR_MASK ((1ULL << TLBI_ADDR_SIZE) - 1)
 145 #define TLBI_ADDR_SHIFT (12)
 146 #define tlbi_addr(x) (((x) >> TLBI_ADDR_SHIFT) & TLBI_ADDR_MASK)
 147
 148 #define TLBI_ASID_SHIFT 48
 149 #define TLBI_ASID_SIZE 16
 150 #define TLBI_ASID_MASK (((1ULL << TLBI_ASID_SIZE) - 1) << TLBI_ASID_SHIFT)
 151 #define tlbi_asid(x) (((uint64_t)x << TLBI_ASID_SHIFT) & TLBI_ASID_MASK)
 152 #else
 153 extern void flush_mmu_tlb_entry(uint32_t);
 154 extern void flush_mmu_tlb_entries(uint32_t, uint32_t);
 155 extern void flush_mmu_tlb_mva_entries(uint32_t);
 156 extern void flush_mmu_tlb_asid(uint32_t);
 157 extern void flush_core_tlb_asid(uint32_t);
 158 #endif
 159 extern void flush_mmu_tlb_region(vm_offset_t va, unsigned length);
 160
 161 #if defined(__arm64__)
 162 extern uint64_t get_mmu_control(void);
 163 extern void set_mmu_control(uint64_t);
 164 extern uint64_t get_aux_control(void);
 165 extern void set_aux_control(uint64_t);
 166 extern void set_mmu_ttb(uint64_t);
 167 extern void set_mmu_ttb_alternate(uint64_t);
 168 extern uint64_t get_tcr(void);
 169 extern void set_tcr(uint64_t);
 170 #else
 171 extern uint32_t get_mmu_control(void);
 172 extern void set_mmu_control(uint32_t);
 173 extern uint32_t get_aux_control(void);
 174 extern void set_aux_control(uint32_t);
 175 extern void set_mmu_ttb(pmap_paddr_t);
 176 extern void set_mmu_ttb_alternate(pmap_paddr_t);
 177 extern void set_context_id(uint32_t);
 178 #endif
 179
 180 extern pmap_paddr_t get_mmu_ttb(void);
 181 extern pmap_paddr_t mmu_kvtop(vm_offset_t va);
 182 extern pmap_paddr_t mmu_kvtop_wpreflight(vm_offset_t va);
 183 extern pmap_paddr_t mmu_uvtop(vm_offset_t va);
 184
 185 #if (__ARM_VMSA__ <= 7)
 186 /* Convert address offset to translation table index */
 187 #define ttenum(a)               ((a) >> ARM_TT_L1_SHIFT)
 188
 189 /* Convert translation table index to user virtual address */
 190 #define tteitova(a)             ((a) << ARM_TT_L1_SHIFT)
 191
 192 #define pa_to_suptte(a)         ((a) & ARM_TTE_SUPER_L1_MASK)
 193 #define suptte_to_pa(p)         ((p) & ARM_TTE_SUPER_L1_MASK)
 194
 195 #define pa_to_sectte(a)         ((a) & ARM_TTE_BLOCK_L1_MASK)
 196 #define sectte_to_pa(p)         ((p) & ARM_TTE_BLOCK_L1_MASK)
 197
 198 #define pa_to_tte(a)            ((a) & ARM_TTE_TABLE_MASK)
 199 #define tte_to_pa(p)            ((p) & ARM_TTE_TABLE_MASK)
 200
 201 #define pa_to_pte(a)            ((a) & ARM_PTE_PAGE_MASK)
 202 #define pte_to_pa(p)            ((p) & ARM_PTE_PAGE_MASK)
 203 #define pte_increment_pa(p)     ((p) += ptoa(1))
 204
 205 #define ARM_NESTING_SIZE_MIN    ((PAGE_SIZE/0x1000)*4*ARM_TT_L1_SIZE)
 206 #define ARM_NESTING_SIZE_MAX    ((256*ARM_TT_L1_SIZE))
 207
 208 #else
 209
 210 /* Convert address offset to translation table index */
 211 #define ttel0num(a)     ((a & ARM_TTE_L0_MASK) >> ARM_TT_L0_SHIFT)
 212 #define ttel1num(a)     ((a & ARM_TTE_L1_MASK) >> ARM_TT_L1_SHIFT)
 213 #define ttel2num(a)     ((a & ARM_TTE_L2_MASK) >> ARM_TT_L2_SHIFT)
 214
 215 #define pa_to_tte(a)            ((a) & ARM_TTE_TABLE_MASK)
 216 #define tte_to_pa(p)            ((p) & ARM_TTE_TABLE_MASK)
 217
 218 #define pa_to_pte(a)            ((a) & ARM_PTE_MASK)
 219 #define pte_to_pa(p)            ((p) & ARM_PTE_MASK)
 220 #define pte_to_ap(p)            (((p) & ARM_PTE_APMASK) >> ARM_PTE_APSHIFT)
 221 #define pte_increment_pa(p)     ((p) += ptoa(1))
 222
 223 #define ARM_NESTING_SIZE_MIN    ((PAGE_SIZE/ARM_PGBYTES)*ARM_TT_L2_SIZE)
 224 #define ARM_NESTING_SIZE_MAX    (0x0000000010000000ULL)
 225
 226 #define TLBFLUSH_SIZE   (ARM_TTE_MAX/((sizeof(unsigned int))*BYTE_SIZE))
 227
 228 #endif  /* __ARM_VMSA__ <= 7 */
 229
 230 #define PMAP_GC_INFLIGHT        1
 231 #define PMAP_GC_WAIT            2
 232
 233 /*
 234  *      Convert translation/page table entry to kernel virtual address
 235  */
 236 #define ttetokv(a)      (phystokv(tte_to_pa(a)))
 237 #define ptetokv(a)      (phystokv(pte_to_pa(a)))
 238
 239 struct pmap {
 240         tt_entry_t                      *tte;                   /* translation table entries */
 241         pmap_paddr_t            ttep;                   /* translation table physical */
 242         vm_map_address_t        min;                    /* min address in pmap */
 243         vm_map_address_t        max;                    /* max address in pmap */
 244         unsigned int            asid;                   /* address space id */
 245         unsigned int            vasid;                  /* Virtual address space id */
 246         unsigned int            stamp;                  /* creation stamp */
 247         unsigned int            wired;                  /* wired bits */
 248         volatile uint32_t       ref_count;              /* pmap reference count */
 249         unsigned int            cpu_ref;                /* number of cpus using pmap */
 250         unsigned int            gc_status;              /* gc status */
 251         ledger_t                        ledger;                 /* ledger tracking phys mappings */
 252         decl_simple_lock_data(,lock)            /* lock on map */
 253         struct pmap_statistics  stats;          /* map statistics */
 254         queue_chain_t           pmaps;                  /* global list of pmaps */
 255         tt_entry_t                      *tt_entry_free; /* free translation table entries */
 256         tt_entry_t                      *prev_tte;              /* previous translation table */
 257         unsigned int            tte_index_max;  /* max tte index in translation table entries */
 258         boolean_t                       nx_enabled;             /* no execute */
 259         boolean_t                       nested;                 /* is nested */
 260         boolean_t                       is_64bit;               /* is 64bit */
 261         struct pmap                     *nested_pmap;   /* nested pmap */
 262         vm_map_address_t        nested_region_grand_addr;
 263         vm_map_address_t        nested_region_subord_addr;
 264         vm_map_offset_t         nested_region_size;
 265         unsigned int            *nested_region_asid_bitmap;
 266         unsigned int            nested_region_asid_bitmap_size;
 267
 268 #if (__ARM_VMSA__ <= 7)
 269         decl_simple_lock_data(,tt1_lock)        /* lock on tt1 */
 270 #endif
 271 #if MACH_ASSERT
 272         int                                     pmap_pid;
 273         char                            pmap_procname[17];
 274 #endif /* MACH_ASSERT */
 275 #if DEVELOPMENT || DEBUG
 276         boolean_t               footprint_suspended;
 277         boolean_t               footprint_was_suspended;
 278 #endif /* DEVELOPMENT || DEBUG */
 279 };
 280
 281 /* typedef struct pmap *pmap_t; */
 282 #define PMAP_NULL       ((pmap_t) 0)
 283
 284
 285 /*
 286  * WIMG control
 287  */
 288 #define VM_MEM_INNER            0x10
 289 #define VM_MEM_EARLY_ACK        0x20
 290
 291 #define VM_WIMG_DEFAULT         (VM_MEM_COHERENT)
 292 #define VM_WIMG_COPYBACK        (VM_MEM_COHERENT)
 293 #define VM_WIMG_INNERWBACK      (VM_MEM_COHERENT | VM_MEM_INNER)
 294 #define VM_WIMG_IO              (VM_MEM_COHERENT | VM_MEM_NOT_CACHEABLE | VM_MEM_GUARDED)
 295 #define VM_WIMG_POSTED          (VM_MEM_COHERENT | VM_MEM_NOT_CACHEABLE | VM_MEM_GUARDED | VM_MEM_EARLY_ACK)
 296 #define VM_WIMG_WTHRU           (VM_MEM_WRITE_THROUGH | VM_MEM_COHERENT | VM_MEM_GUARDED)
 297 #define VM_WIMG_WCOMB           (VM_MEM_NOT_CACHEABLE | VM_MEM_COHERENT)
 298
 299
 300 #if VM_DEBUG
 301 extern int      pmap_list_resident_pages(
 302                         pmap_t          pmap,
 303                         vm_offset_t  *listp,
 304                         int             space
 305                 );
 306 #else /* #if VM_DEBUG */
 307 #define pmap_list_resident_pages(pmap, listp, space) (0)
 308 #endif /* #if VM_DEBUG */
 309
 310 extern int copysafe(vm_map_address_t from, vm_map_address_t to, uint32_t cnt, int type, uint32_t *bytes_copied);
 311
 312 /* globals shared between arm_vm_init and pmap */
 313 extern tt_entry_t *cpu_tte;     /* first CPUs translation table (shared with kernel pmap) */
 314 extern pmap_paddr_t cpu_ttep;  /* physical translation table addr */
 315
 316 #if __arm64__
 317 extern void *ropagetable_begin;
 318 extern void *ropagetable_end;
 319 #endif
 320
 321 #if __arm64__
 322 extern tt_entry_t *invalid_tte; /* global invalid translation table  */
 323 extern pmap_paddr_t invalid_ttep;  /* physical invalid translation table addr */
 324 #endif
 325
 326 #define PMAP_CONTEXT(pmap, thread)
 327
 328 /*
 329  * platform dependent Prototypes
 330  */
 331 extern void pmap_switch_user_ttb(pmap_t pmap);
 332 extern void pmap_bootstrap(vm_offset_t);
 333 extern vm_map_address_t pmap_ptov(pmap_t, ppnum_t);
 334 extern ppnum_t pmap_find_phys(pmap_t map, addr64_t va);
 335 extern void pmap_set_pmap(pmap_t pmap, thread_t thread);
 336 extern void pmap_collect(pmap_t pmap);
 337 extern  void pmap_gc(void);
 338 #if defined(__arm64__)
 339 extern vm_offset_t      pmap_extract(pmap_t pmap, vm_map_offset_t va);
 340 #endif
 341
 342 /*
 343  * Interfaces implemented as macros.
 344  */
 345
 346 #define PMAP_SWITCH_USER(th, new_map, my_cpu) {                         \
 347         th->map = new_map;                                                                              \
 348         pmap_set_pmap(vm_map_pmap(new_map), th);                                \
 349 }
 350
 351 #define pmap_kernel()                                                                           \
 352         (kernel_pmap)
 353
 354 #define pmap_compressed(pmap)                                                           \
 355         ((pmap)->stats.compressed)
 356
 357 #define pmap_resident_count(pmap)                                                       \
 358         ((pmap)->stats.resident_count)
 359
 360 #define pmap_resident_max(pmap)                                                         \
 361         ((pmap)->stats.resident_max)
 362
 363 #define MACRO_NOOP
 364
 365 #define pmap_copy(dst_pmap, src_pmap, dst_addr, len, src_addr)          \
 366         MACRO_NOOP
 367
 368 #define pmap_pageable(pmap, start, end, pageable)                       \
 369         MACRO_NOOP
 370
 371 #define pmap_kernel_va(VA)                                              \
 372         (((VA) >= VM_MIN_KERNEL_ADDRESS) && ((VA) <= VM_MAX_KERNEL_ADDRESS))
 373
 374 #define pmap_attribute(pmap,addr,size,attr,value)                       \
 375         (KERN_INVALID_ADDRESS)
 376
 377 #define copyinmsg(from, to, cnt)                                                        \
 378         copyin(from, to, cnt)
 379
 380 #define copyoutmsg(from, to, cnt)                                                       \
 381         copyout(from, to, cnt)
 382
 383 extern pmap_paddr_t kvtophys(vm_offset_t va);
 384
 385 extern vm_map_address_t pmap_map(vm_map_address_t va, vm_offset_t sa, vm_offset_t ea, vm_prot_t prot, unsigned int flags);
 386 extern vm_map_address_t pmap_map_high_window_bd( vm_offset_t pa, vm_size_t len, vm_prot_t prot);
 387 extern kern_return_t pmap_map_block(pmap_t pmap, addr64_t va, ppnum_t pa, uint32_t size, vm_prot_t prot, int attr, unsigned int flags);
 388 extern void pmap_map_globals(void);
 389
 390 #define PMAP_MAP_BD_DEVICE      0x1
 391 #define PMAP_MAP_BD_WCOMB       0x2
 392 #define PMAP_MAP_BD_POSTED      0x3
 393 #define PMAP_MAP_BD_MASK        0x3
 394
 395 extern vm_map_address_t pmap_map_bd_with_options(vm_map_address_t va, vm_offset_t sa, vm_offset_t ea, vm_prot_t prot, int32_t options);
 396 extern vm_map_address_t pmap_map_bd(vm_map_address_t va, vm_offset_t sa, vm_offset_t ea, vm_prot_t prot);
 397
 398 extern void pmap_init_pte_page(pmap_t, pt_entry_t *, vm_offset_t, unsigned int ttlevel, boolean_t alloc_ptd);
 399 extern void pmap_init_pte_static_page(pmap_t, pt_entry_t *, pmap_paddr_t);
 400
 401 extern boolean_t pmap_valid_address(pmap_paddr_t addr);
 402 extern void pmap_disable_NX(pmap_t pmap);
 403 extern void pmap_set_nested(pmap_t pmap);
 404 extern vm_map_address_t pmap_create_sharedpage(void);
 405 extern void pmap_insert_sharedpage(pmap_t pmap);
 406 extern void pmap_protect_sharedpage(void);
 407
 408 extern vm_offset_t pmap_cpu_windows_copy_addr(int cpu_num, unsigned int index);
 409 extern unsigned int pmap_map_cpu_windows_copy(ppnum_t pn, vm_prot_t prot, unsigned int wimg_bits);
 410 extern void pmap_unmap_cpu_windows_copy(unsigned int index);
 411
 412 extern void pt_fake_zone_init(int);
 413 extern void pt_fake_zone_info(int *, vm_size_t *, vm_size_t *, vm_size_t *, vm_size_t *,
 414                               uint64_t *, int *, int *, int *);
 415
 416 extern boolean_t pmap_valid_page(ppnum_t pn);
 417
 418 #define MACHINE_PMAP_IS_EMPTY 1
 419 extern boolean_t pmap_is_empty(pmap_t pmap, vm_map_offset_t start, vm_map_offset_t end);
 420
 421 #define ARM_PMAP_MAX_OFFSET_DEFAULT     0x01
 422 #define ARM_PMAP_MAX_OFFSET_MIN         0x02
 423 #define ARM_PMAP_MAX_OFFSET_MAX         0x04
 424 #define ARM_PMAP_MAX_OFFSET_DEVICE      0x08
 425 #define ARM_PMAP_MAX_OFFSET_JUMBO       0x10
 426
 427 #define ASID_SHIFT                      (11)                            /* Shift for the maximum virtual ASID value (2048) */
 428 #define MAX_ASID                        (1 << ASID_SHIFT)               /* Max supported ASIDs (can be virtual) */
 429 #define ARM_ASID_SHIFT                  (8)                             /* Shift for the maximum ARM ASID value (256) */
 430 #define ARM_MAX_ASID                    (1 << ARM_ASID_SHIFT)           /* Max ASIDs supported by the hardware */
 431 #define ASID_VIRT_BITS                  (ASID_SHIFT - ARM_ASID_SHIFT)   /* The number of virtual bits in a virtaul ASID */
 432 #define NBBY                            8
 433
 434 extern vm_map_offset_t pmap_max_offset(boolean_t is64, unsigned int option);
 435
 436 boolean_t pmap_virtual_region(unsigned int region_select, vm_map_offset_t *startp, vm_map_size_t *size);
 437
 438 boolean_t pmap_enforces_execute_only(pmap_t pmap);
 439
 440 /* pmap dispatch indices */
 441 #define ARM_FAST_FAULT_INDEX 0
 442 #define ARM_FORCE_FAST_FAULT_INDEX 1
 443 #define MAPPING_FREE_PRIME_INDEX 2
 444 #define MAPPING_REPLENISH_INDEX 3
 445 #define PHYS_ATTRIBUTE_CLEAR_INDEX 4
 446 #define PHYS_ATTRIBUTE_SET_INDEX 5
 447 #define PMAP_BATCH_SET_CACHE_ATTRIBUTES_INDEX 6
 448 #define PMAP_CHANGE_WIRING_INDEX 7
 449 #define PMAP_CREATE_INDEX 8
 450 #define PMAP_DESTROY_INDEX 9
 451 #define PMAP_ENTER_OPTIONS_INDEX 10
 452 #define PMAP_EXTRACT_INDEX 11
 453 #define PMAP_FIND_PHYS_INDEX 12
 454 #define PMAP_INSERT_SHAREDPAGE_INDEX 13
 455 #define PMAP_IS_EMPTY_INDEX 14
 456 #define PMAP_MAP_CPU_WINDOWS_COPY_INDEX 15
 457 #define PMAP_MARK_PAGE_AS_PMAP_PAGE_INDEX 16
 458 #define PMAP_NEST_INDEX 17
 459 #define PMAP_PAGE_PROTECT_OPTIONS_INDEX 18
 460 #define PMAP_PROTECT_OPTIONS_INDEX 19
 461 #define PMAP_QUERY_PAGE_INFO_INDEX 20
 462 #define PMAP_QUERY_RESIDENT_INDEX 21
 463 #define PMAP_REFERENCE_INDEX 22
 464 #define PMAP_REMOVE_OPTIONS_INDEX 23
 465 #define PMAP_RETURN_INDEX 24
 466 #define PMAP_SET_CACHE_ATTRIBUTES_INDEX 25
 467 #define PMAP_SET_NESTED_INDEX 26
 468 #define PMAP_SET_PROCESS_INDEX 27
 469 #define PMAP_SWITCH_INDEX 28
 470 #define PMAP_SWITCH_USER_TTB_INDEX 29
 471 #define PMAP_UNHINT_KV_ADDR_INDEX 30
 472 #define PMAP_UNMAP_CPU_WINDOWS_COPY_INDEX 31
 473 #define PMAP_UNNEST_OPTIONS_INDEX 32
 474 #define PMAP_FOOTPRINT_SUSPEND_INDEX 33
 475 #define PMAP_CPU_DATA_INIT_INDEX 34
 476 #define PMAP_RELEASE_PAGES_TO_KERNEL_INDEX 35
 477
 478 #define MAX_PMAP_INDEX 36
 479
 480 #define PMAP_INVALID_CPU_NUM (~0U)
 481
 482 struct pmap_cpu_data {
 483         pmap_t cpu_user_pmap;
 484         unsigned int cpu_number;
 485         unsigned int cpu_user_pmap_stamp;
 486
 487         /*
 488          * This supports overloading of ARM ASIDs by the pmap.  The field needs
 489          * to be wide enough to cover all the virtual bits in a virtual ASID.
 490          * With 256 physical ASIDs, 8-bit fields let us support up to 65536
 491          * Virtual ASIDs, minus all that would map on to 0 (as 0 is a global
 492          * ASID).
 493          *
 494          * If we were to use bitfield shenanigans here, we could save a bit of
 495          * memory by only having enough bits to support MAX_ASID.  However, such
 496          * an implementation would be more error prone.
 497          */
 498         uint8_t cpu_asid_high_bits[ARM_MAX_ASID];
 499 };
 500
 501 typedef struct pmap_cpu_data pmap_cpu_data_t;
 502
 503 /* Initialize the pmap per-CPU data for the current CPU. */
 504 extern void pmap_cpu_data_init(void);
 505
 506 /* Get the pmap per-CPU data for the current CPU. */
 507 extern pmap_cpu_data_t * pmap_get_cpu_data(void);
 508
 509 #define MARK_AS_PMAP_TEXT
 510 #define MARK_AS_PMAP_DATA
 511
 512 extern kern_return_t pmap_return(boolean_t do_panic, boolean_t do_recurse);
 513
 514 #endif /* #ifndef ASSEMBLER */
 515
 516 #endif /* #ifndef _ARM_PMAP_H_ */