osfmk/ppc/pmap.h

   1 /*
   2  * Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 /*
  23  * @OSF_COPYRIGHT@
  24  */
  25 /*
  26  * Copyright (c) 1990 The University of Utah and
  27  * the Center for Software Science at the University of Utah (CSS).
  28  * All rights reserved.
  29  *
  30  * Permission to use, copy, modify and distribute this software is hereby
  31  * granted provided that (1) source code retains these copyright, permission,
  32  * and disclaimer notices, and (2) redistributions including binaries
  33  * reproduce the notices in supporting documentation, and (3) all advertising
  34  * materials mentioning features or use of this software display the following
  35  * acknowledgement: ``This product includes software developed by the Center
  36  * for Software Science at the University of Utah.''
  37  *
  38  * THE UNIVERSITY OF UTAH AND CSS ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS
  39  * IS" CONDITION.  THE UNIVERSITY OF UTAH AND CSS DISCLAIM ANY LIABILITY OF
  40  * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
  41  *
  42  * CSS requests users of this software to return to css-dist@cs.utah.edu any
  43  * improvements that they make and grant CSS redistribution rights.
  44  *
  45  *      Utah $Hdr: pmap.h 1.13 91/09/25$
  46  *      Author: Mike Hibler, Bob Wheeler, University of Utah CSS, 9/90
  47  */
  48
  49 #ifndef _PPC_PMAP_H_
  50 #define _PPC_PMAP_H_
  51
  52 #include <mach/vm_types.h>
  53 #include <mach/machine/vm_types.h>
  54 #include <mach/vm_prot.h>
  55 #include <mach/vm_statistics.h>
  56 #include <kern/queue.h>
  57 #include <vm/pmap.h>
  58 #include <ppc/mappings.h>
  59
  60 #define maxPPage32 0x000FFFFF                   /* Maximum page number in 32-bit machines */
  61
  62 typedef uint32_t shexlock;
  63
  64 #pragma pack(4)                                                 /* Make sure the structure stays as we defined it */
  65
  66 struct sgc {
  67         uint64_t        sgcESID;                                /* ESID portion of segment cache */
  68 #define sgcESmsk        0xFFFFFFFFF0000000ULL   /* ESID portion of segment register cache */
  69         uint64_t        sgcVSID;                                /* VSID portion of segment cache */
  70 #define sgcVSmsk        0xFFFFFFFFFFFFF000ULL   /* VSID mask */
  71 #define sgcVSKeys       0x0000000000000C00ULL   /* Protection keys */
  72 #define sgcVSKeyUsr     53                                      /* User protection key */
  73 #define sgcVSNoEx       0x0000000000000200ULL   /* No execute */
  74 };
  75 #pragma pack()
  76
  77 typedef struct sgc sgc;
  78
  79 #pragma pack(4)                                                 /* Make sure the structure stays as we defined it */
  80 struct pmap_vmm_stats {
  81         unsigned int    vxsGpf;                         /* Guest faults */
  82         unsigned int    vxsGpfMiss;                     /* Faults that miss in hash table */
  83
  84         unsigned int    vxsGrm;                         /* Guest mapping remove requests */
  85         unsigned int    vxsGrmMiss;                     /* Remove misses in hash table */
  86         unsigned int    vxsGrmActive;           /* Remove hits that are active */
  87
  88         unsigned int    vxsGra;                         /* Guest remove all mappings requests */
  89         unsigned int    vxsGraHits;                     /* Remove hits in hash table */
  90         unsigned int    vxsGraActive;           /* Remove hits that are active */
  91
  92         unsigned int    vxsGrl;                         /* Guest remove local mappings requests */
  93         unsigned int    vxsGrlActive;           /* Active mappings removed */
  94
  95         unsigned int    vxsGrs;                         /* Guest mapping resumes */
  96         unsigned int    vxsGrsHitAct;           /* Resume hits active entry */
  97         unsigned int    vxsGrsHitSusp;          /* Resume hits suspended entry */
  98         unsigned int    vxsGrsMissGV;           /* Resume misses on guest virtual */
  99         unsigned int    vxsGrsHitPE;            /* Resume hits on host virtual */
 100         unsigned int    vxsGrsMissPE;           /* Resume misses on host virtual */
 101
 102         unsigned int    vxsGad;                         /* Guest mapping adds */
 103         unsigned int    vxsGadHit;                      /* Add hits entry (active or dormant) */
 104         unsigned int    vxsGadFree;                     /* Add takes free entry in group */
 105         unsigned int    vxsGadDormant;          /* Add steals dormant entry in group */
 106         unsigned int    vxsGadSteal;            /* Add steals active entry in group */
 107
 108         unsigned int    vxsGsu;                         /* Guest mapping suspends */
 109         unsigned int    vxsGsuHit;                      /* Suspend hits entry (active only) */
 110         unsigned int    vxsGsuMiss;                     /* Suspend misses entry */
 111
 112         unsigned int    vxsGtd;                         /* Guest test ref&chg */
 113         unsigned int    vxsGtdHit;                      /* Test r&c hits entry (active only) */
 114         unsigned int    vxsGtdMiss;                     /* Test r&c misses entry */
 115 };
 116 #pragma pack()
 117 typedef struct pmap_vmm_stats pmap_vmm_stats;
 118
 119 /* Not wanting to tax all of our customers for the sins of those that use virtual operating
 120    systems, we've built the hash table from its own primitive virtual memory. We first
 121    allocate a pmap_vmm_ext with sufficient space following to accomodate the hash table
 122    index (one 64-bit physical address per 4k-byte page of hash table). The allocation
 123    must not cross a 4k-byte page boundary (we'll be accessing the block with relocation
 124    off), so we'll try a couple of times, then just burn a whole page. We stuff the effective
 125    address of the cache-aligned index into hIdxBase; the physical-mode code locates the index
 126    by adding the size of a pmap_vmm_extension to its translated physical address, then rounding
 127    up to the next 32-byte boundary. Now we grab enough virtual pages to contain the hash table,
 128    and fill in the index with the page's physical addresses. For the final touch that's sure
 129    to please, we initialize the hash table. Mmmmm, golden brown perfection.
 130  */
 131
 132 #pragma pack(4)
 133 struct pmap_vmm_ext {
 134         addr64_t                vmxSalt;                        /* This block's virt<->real conversion salt */
 135         addr64_t                vmxHostPmapPhys;        /* Host pmap physical address */
 136         struct pmap             *vmxHostPmap;           /* Host pmap effective address */
 137         addr64_t                *vmxHashPgIdx;          /* Hash table physical index base address */
 138         vm_offset_t             *vmxHashPgList;         /* List of virtual pages comprising the hash table */
 139         unsigned int    *vmxActiveBitmap;       /* Bitmap of active mappings in hash table */
 140         pmap_vmm_stats  vmxStats;                       /* Stats for VMM assists */
 141 #define VMX_HPIDX_OFFSET ((sizeof(pmap_vmm_ext) + 127) & ~127)
 142                                                                                 /* The hash table physical index begins at the first
 143                                                                                    128-byte boundary after the pmap_vmm_ext struct */
 144 #define VMX_HPLIST_OFFSET (VMX_HPIDX_OFFSET + (GV_HPAGES * sizeof(addr64_t)))
 145 #define VMX_ACTMAP_OFFSET (VMX_HPLIST_OFFSET + (GV_HPAGES * sizeof(vm_offset_t)))
 146 };
 147 #pragma pack()
 148 typedef struct pmap_vmm_ext pmap_vmm_ext;
 149
 150 #pragma pack(4)                                                 /* Make sure the structure stays as we defined it */
 151 struct pmap {
 152         queue_head_t    pmap_link;                      /* MUST BE FIRST */
 153         addr64_t                pmapvr;                         /* Virtual to real conversion mask */
 154         shexlock                pmapSXlk;                       /* Shared/Exclusive lock for mapping changes */
 155         unsigned int    space;                          /* space for this pmap */
 156 #define invalSpace 0x00000001                   /* Predefined always invalid space */
 157         int                             ref_count;                      /* reference count */
 158         unsigned int    pmapFlags;                      /* Flags */
 159 #define pmapKeys        0x00000007                      /* Keys and no execute bit to use with this pmap */
 160 #define pmapKeyDef      0x00000006                      /* Default keys - Sup = 1, user = 1, no ex = 0 */
 161 #define pmapVMhost      0x00000010                      /* pmap with Virtual Machines attached to it */
 162 #define pmapVMgsaa      0x00000020                      /* Guest shadow assist active */
 163         unsigned int    spaceNum;                       /* Space number */
 164         unsigned int    pmapCCtl;                       /* Cache control */
 165 #define pmapCCtlVal     0xFFFF0000                      /* Valid entries */
 166 #define pmapCCtlLck     0x00008000                      /* Lock bit */
 167 #define pmapCCtlLckb    16                              /* Lock bit */
 168 #define pmapCCtlGen     0x00007FFF                      /* Generation number */
 169
 170 #define pmapSegCacheCnt 16                              /* Maximum number of cache entries */
 171 #define pmapSegCacheUse 16                              /* Number of cache entries to use */
 172
 173         struct pmap             *freepmap;                      /* Free pmaps */
 174         pmap_vmm_ext   *pmapVmmExt;                     /* VMM extension block, for VMM host and guest pmaps */
 175         addr64_t                pmapVmmExtPhys;         /* VMM extension block physical address */
 176 /*                                                                                      0x038 */
 177         uint64_t                pmapSCSubTag;           /* Segment cache sub-tags. This is a 16 entry 4 bit array */
 178 /*                                                                                      0x040 */
 179         sgc                     pmapSegCache[pmapSegCacheCnt];  /* SLD values cached for quick load */
 180
 181 /*                                                                                      0x140 */
 182 /* if fanout is 4, then shift is 1, if fanout is 8 shift is 2, etc */
 183 #define kSkipListFanoutShift    1
 184 /* with n lists, we can handle (fanout**n) pages optimally */
 185 #define kSkipListMaxLists               12
 186     unsigned char       pmapCurLists;           /*  0x140 - max #lists any mapping in this pmap currently has */
 187     unsigned char       pmapRsv2[3];
 188     uint32_t            pmapRandNum;            /* 0x144 - used by mapSetLists() as a random number generator */
 189     addr64_t            pmapSkipLists[kSkipListMaxLists];       /* 0x148 - the list headers */
 190 /* following statistics conditionally gathered */
 191     uint64_t            pmapSearchVisits;       /* 0x1A8 - nodes visited searching pmaps */
 192     uint32_t            pmapSearchCnt;          /* 0x1B0 - number of calls to mapSearch or mapSearchFull */
 193
 194         unsigned int    pmapRsv3[3];
 195
 196 /*                                                                                      0x1C0 */
 197
 198         struct pmap_statistics  stats;          /* statistics */
 199
 200 /* Need to pad out to a power of 2 - right now it is 512 bytes */
 201 #define pmapSize 512
 202 };
 203 #pragma pack()
 204
 205 #pragma pack(4)
 206 struct pmapTransTab {
 207         addr64_t                pmapPAddr;                      /* Physcial address of pmap */
 208         unsigned int    pmapVAddr;                      /* Virtual address of pmap */
 209 };
 210 #pragma pack()                                                  /* Make sure the structure stays as we defined it */
 211
 212 typedef struct pmapTransTab pmapTransTab;
 213
 214 /*
 215  *      Address Chunk IDentified Table
 216  */
 217
 218 struct acidTabEnt {
 219         unsigned int    acidVAddr;                      /* Virtual address of pmap or pointer to next free entry */
 220         unsigned int    acidGas;                        /* reserved */
 221         addr64_t                acidPAddr;                      /* Physcial address of pmap */
 222 };
 223
 224 typedef struct acidTabEnt acidTabEnt;
 225
 226 extern acidTabEnt *acidTab;                             /* Pointer to acid table */
 227 extern acidTabEnt *acidFree;                    /* List of free acid entries */
 228
 229 #define PMAP_NULL  ((pmap_t) 0)
 230
 231 extern pmap_t   cursor_pmap;                    /* The pmap to start allocations with */
 232 extern pmap_t   sharedPmap;
 233 extern unsigned int sharedPage;
 234 extern int ppc_max_adrsp;                               /* Maximum number of concurrent address spaces allowed. */
 235 extern addr64_t vm_max_address;                 /* Maximum effective address supported */
 236 extern addr64_t vm_max_physical;                /* Maximum physical address supported */
 237 extern pmapTransTab *pmapTrans;                 /* Space to pmap translate table */
 238 #define PMAP_SWITCH_USER(th, map, my_cpu) th->map = map;
 239
 240 #define PMAP_CONTEXT(pmap,th)
 241
 242 #define pmap_kernel_va(VA)      \
 243         (((VA) >= VM_MIN_KERNEL_ADDRESS) && ((VA) <= vm_last_addr))
 244
 245 #define PPC_SID_KERNEL  0       /* Must change KERNEL_SEG_REG0_VALUE if !0 */
 246
 247 #define maxAdrSp 16384
 248 #define maxAdrSpb 14
 249 #define USER_MEM_WINDOW_VADDR   0x00000000E0000000ULL
 250 #define PHYS_MEM_WINDOW_VADDR   0x0000000100000000ULL
 251 #define IO_MEM_WINDOW_VADDR             0x0000000080000000ULL
 252 #define IO_MEM_WINDOW_SIZE              0x0000000080000000ULL
 253 #define pmapSmallBlock 65536
 254
 255 #define pmap_kernel()                   (kernel_pmap)
 256 #define pmap_resident_count(pmap)       ((pmap)->stats.resident_count)
 257 #define pmap_remove_attributes(pmap,start,end)
 258 #define pmap_copy(dpmap,spmap,da,len,sa)
 259 #define pmap_update()
 260
 261 #define PMAP_DEFAULT_CACHE      0
 262 #define PMAP_INHIBIT_CACHE      1
 263 #define PMAP_GUARDED_CACHE      2
 264 #define PMAP_ACTIVATE_CACHE     4
 265 #define PMAP_NO_GUARD_CACHE     8
 266
 267 /* corresponds to cached, coherent, not writethru, not guarded */
 268 #define VM_WIMG_DEFAULT         (VM_MEM_COHERENT)
 269 #define VM_WIMG_COPYBACK        (VM_MEM_COHERENT)
 270 #define VM_WIMG_IO              (VM_MEM_COHERENT |      \
 271                                 VM_MEM_NOT_CACHEABLE | VM_MEM_GUARDED)
 272 #define VM_WIMG_WTHRU           (VM_MEM_WRITE_THROUGH | VM_MEM_COHERENT | VM_MEM_GUARDED)
 273 /* write combining mode, aka store gather */
 274 #define VM_WIMG_WCOMB           (VM_MEM_NOT_CACHEABLE | VM_MEM_COHERENT)
 275
 276 /*
 277  * prototypes.
 278  */
 279 extern vm_offset_t phystokv(vm_offset_t pa);                                    /* Get kernel virtual address from physical */
 280 extern vm_offset_t kvtophys(vm_offset_t va);                                    /* Get physical address from kernel virtual */
 281 extern vm_map_offset_t kvtophys64(vm_map_offset_t va);                          /* Get 64-bit physical address from kernel virtual */
 282 extern vm_offset_t      pmap_map(vm_offset_t va,
 283                                  vm_offset_t spa,
 284                                  vm_offset_t epa,
 285                                  vm_prot_t prot);
 286 extern kern_return_t    pmap_add_physical_memory(vm_offset_t spa,
 287                                                  vm_offset_t epa,
 288                                                  boolean_t available,
 289                                                  unsigned int attr);
 290 extern void             pmap_bootstrap(uint64_t msize,
 291                                        vm_offset_t *first_avail,
 292                                        unsigned int kmapsize);
 293
 294 extern vm_offset_t pmap_boot_map(vm_size_t size);
 295
 296 extern void sync_cache64(addr64_t pa, unsigned length);
 297 extern void sync_ppage(ppnum_t pa);
 298 extern void     sync_cache_virtual(vm_offset_t va, unsigned length);
 299 extern void flush_dcache(vm_offset_t va, unsigned length, boolean_t phys);
 300 extern void flush_dcache64(addr64_t va, unsigned length, boolean_t phys);
 301 extern void invalidate_dcache(vm_offset_t va, unsigned length, boolean_t phys);
 302 extern void invalidate_dcache64(addr64_t va, unsigned length, boolean_t phys);
 303 extern void invalidate_icache(vm_offset_t va, unsigned length, boolean_t phys);
 304 extern void invalidate_icache64(addr64_t va, unsigned length, boolean_t phys);
 305 extern void pmap_sync_page_data_phys(ppnum_t pa);
 306 extern void pmap_sync_page_attributes_phys(ppnum_t pa);
 307 extern void pmap_map_block(pmap_t pmap, addr64_t va, ppnum_t pa, uint32_t size, vm_prot_t prot, int attr, unsigned int flags);
 308 extern int pmap_map_block_rc(pmap_t pmap, addr64_t va, ppnum_t pa, uint32_t size, vm_prot_t prot, int attr, unsigned int flags);
 309
 310 extern kern_return_t pmap_nest(pmap_t grand, pmap_t subord, addr64_t vstart, addr64_t nstart, uint64_t size);
 311 extern kern_return_t pmap_unnest(pmap_t grand, addr64_t vaddr);
 312 extern ppnum_t pmap_find_phys(pmap_t pmap, addr64_t va);
 313 extern void MapUserMemoryWindowInit(void);
 314 extern addr64_t MapUserMemoryWindow(vm_map_t map, addr64_t va);
 315 extern boolean_t pmap_eligible_for_execute(ppnum_t pa);
 316 extern int pmap_list_resident_pages(
 317         struct pmap     *pmap,
 318         vm_offset_t     *listp,
 319         int             space);
 320 extern void pmap_init_sharedpage(vm_offset_t cpg);
 321 extern void pmap_map_sharedpage(task_t task, pmap_t pmap);
 322 extern void pmap_unmap_sharedpage(pmap_t pmap);
 323
 324
 325
 326 #endif /* _PPC_PMAP_H_ */
 327