sys/platform/vkernel64/include/pmap.h

   1 /*
   2  * Copyright (c) 1991 Regents of the University of California.
   3  * All rights reserved.
   4  *
   5  * This code is derived from software contributed to Berkeley by
   6  * the Systems Programming Group of the University of Utah Computer
   7  * Science Department and William Jolitz of UUNET Technologies Inc.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  * 3. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  * Derived from hp300 version by Mike Hibler, this version by William
  34  * Jolitz uses a recursive map [a pde points to the page directory] to
  35  * map the page tables using the pagetables themselves. This is done to
  36  * reduce the impact on kernel virtual memory for lots of sparse address
  37  * space, and to reduce the cost of memory to each process.
  38  *
  39  * from: hp300: @(#)pmap.h      7.2 (Berkeley) 12/16/90
  40  * from: @(#)pmap.h     7.4 (Berkeley) 5/12/91
  41  * $FreeBSD: src/sys/i386/include/pmap.h,v 1.65.2.3 2001/10/03 07:15:37 peter Exp $
  42  */
  43
  44 #ifndef _MACHINE_PMAP_H_
  45 #define _MACHINE_PMAP_H_
  46
  47 #include <cpu/pmap.h>
  48
  49 /*
  50  * Pte related macros
  51  */
  52 #define KVADDR(l4, l3, l2, l1) ( \
  53         ((unsigned long)-1 << 47) | \
  54         ((unsigned long)(l4) << PML4SHIFT) | \
  55         ((unsigned long)(l3) << PDPSHIFT) | \
  56         ((unsigned long)(l2) << PDRSHIFT) | \
  57         ((unsigned long)(l1) << PAGE_SHIFT))
  58
  59 #define UVADDR(l4, l3, l2, l1) ( \
  60         ((unsigned long)(l4) << PML4SHIFT) | \
  61         ((unsigned long)(l3) << PDPSHIFT) | \
  62         ((unsigned long)(l2) << PDRSHIFT) | \
  63         ((unsigned long)(l1) << PAGE_SHIFT))
  64
  65 /*
  66  * Initial number of kernel page tables.  NKPT is now calculated in the
  67  * pmap code.
  68  *
  69  * Give NKPDPE a generous value, allowing the kernel to map up to 128G.
  70  */
  71 #define NKPML4E         1               /* number of kernel PML4 slots */
  72 #define NKPDPE          128             /* number of kernel PDP slots */
  73
  74 #define NUPML4E         (NPML4EPG/2)    /* number of userland PML4 pages */
  75 #define NUPDPE          (NUPML4E*NPDPEPG)/* number of userland PDP pages */
  76 #define NUPDE           (NUPDPE*NPDEPG) /* number of userland PD entries */
  77
  78 #define NDMPML4E        1               /* number of dmap PML4 slots */
  79 #define NDMPDPE         NPTEPG          /* number of dmap PDPE slots */
  80
  81 /*
  82  * The *PML4I values control the layout of virtual memory
  83  */
  84 #define PML4PML4I       (NPML4EPG/2)    /* Index of recursive pml4 mapping */
  85
  86
  87 #ifndef LOCORE
  88
  89 #ifndef _SYS_TYPES_H_
  90 #include <sys/types.h>
  91 #endif
  92 #ifndef _SYS_QUEUE_H_
  93 #include <sys/queue.h>
  94 #endif
  95 #ifndef _SYS_SPINLOCK_H_
  96 #include <sys/spinlock.h>
  97 #endif
  98 #ifndef _SYS_THREAD_H_
  99 #include <sys/thread.h>
 100 #endif
 101 #ifndef _SYS_VKERNEL_H_
 102 #include <sys/vkernel.h>
 103 #endif
 104 #ifndef _MACHINE_TYPES_H_
 105 #include <machine/types.h>
 106 #endif
 107 #ifndef _MACHINE_PARAM_H_
 108 #include <machine/param.h>
 109 #endif
 110
 111 #ifdef _KERNEL
 112
 113 /*
 114  * XXX
 115  */
 116 #define vtophys(va)     pmap_kextract(((vm_offset_t)(va)))
 117 #define vtophys_pte(va) ((pt_entry_t)pmap_kextract(((vm_offset_t)(va))))
 118
 119 #endif
 120
 121 #define pte_load_clear(pte)     atomic_readandclear_long(pte)
 122
 123 /*
 124  * Pmap stuff
 125  */
 126 struct pv_entry;
 127 struct vm_page;
 128 struct vm_object;
 129
 130 struct md_page {
 131         int pv_list_count;
 132         TAILQ_HEAD(,pv_entry)   pv_list;
 133 };
 134
 135 struct md_object {
 136 };
 137
 138 /*
 139  * Each machine dependent implementation is expected to
 140  * keep certain statistics.  They may do this anyway they
 141  * so choose, but are expected to return the statistics
 142  * in the following structure.
 143  */
 144 struct pmap_statistics {
 145         long resident_count;    /* # of pages mapped (total) */
 146         long wired_count;       /* # of pages wired */
 147 };
 148 typedef struct pmap_statistics *pmap_statistics_t;
 149
 150 struct pmap {
 151         pml4_entry_t            *pm_pml4;       /* KVA of level 4 page table */
 152         struct vm_page          *pm_pdirm;      /* VM page for pg directory */
 153         vpte_t                  pm_pdirpte;     /* pte mapping phys page */
 154         struct vm_object        *pm_pteobj;     /* Container for pte's */
 155         TAILQ_ENTRY(pmap)       pm_pmnode;      /* list of pmaps */
 156         TAILQ_HEAD(,pv_entry)   pm_pvlist;      /* list of mappings in pmap */
 157         TAILQ_HEAD(,pv_entry)   pm_pvlist_free; /* free mappings */
 158         int                     pm_count;       /* reference count */
 159         cpulock_t               pm_active_lock; /* interlock */
 160         cpumask_t               pm_active;      /* active on cpus */
 161         vm_pindex_t             pm_pdindex;     /* page dir page in obj */
 162         struct pmap_statistics  pm_stats;       /* pmap statistics */
 163         struct  vm_page         *pm_ptphint;    /* pmap ptp hint */
 164         int                     pm_generation;  /* detect pvlist deletions */
 165         struct spinlock         pm_spin;
 166         struct lwkt_token       pm_token;
 167 };
 168
 169 #define pmap_resident_count(pmap) (pmap)->pm_stats.resident_count
 170
 171 typedef struct pmap     *pmap_t;
 172
 173 #ifdef _KERNEL
 174 extern struct pmap      kernel_pmap;
 175 #endif
 176
 177 /*
 178  * For each vm_page_t, there is a list of all currently valid virtual
 179  * mappings of that page.  An entry is a pv_entry_t, the list is pv_table.
 180  */
 181 typedef struct pv_entry {
 182         pmap_t          pv_pmap;        /* pmap where mapping lies */
 183         vm_offset_t     pv_va;          /* virtual address for mapping */
 184         TAILQ_ENTRY(pv_entry)   pv_list;
 185         TAILQ_ENTRY(pv_entry)   pv_plist;
 186         struct vm_page  *pv_ptem;       /* VM page for pte */
 187 } *pv_entry_t;
 188
 189 #ifdef  _KERNEL
 190
 191 extern caddr_t  CADDR1;
 192 extern pt_entry_t *CMAP1;
 193 extern char *ptvmmap;           /* poor name! */
 194 extern vm_offset_t clean_sva;
 195 extern vm_offset_t clean_eva;
 196
 197 #ifndef __VM_PAGE_T_DEFINED__
 198 #define __VM_PAGE_T_DEFINED__
 199 typedef struct vm_page *vm_page_t;
 200 #endif
 201 #ifndef __VM_MEMATTR_T_DEFINED__
 202 #define __VM_MEMATTR_T_DEFINED__
 203 typedef char vm_memattr_t;
 204 #endif
 205
 206 void    pmap_bootstrap(vm_paddr_t *, int64_t);
 207 void    *pmap_mapdev (vm_paddr_t, vm_size_t);
 208 void    pmap_page_set_memattr(vm_page_t m, vm_memattr_t ma);
 209 void    pmap_unmapdev (vm_offset_t, vm_size_t);
 210 void    pmap_release(struct pmap *pmap);
 211 void    pmap_interlock_wait (struct vmspace *);
 212
 213 struct vm_page *pmap_use_pt (pmap_t, vm_offset_t);
 214
 215 static __inline int
 216 pmap_emulate_ad_bits(pmap_t pmap) {
 217         return 0;
 218 }
 219
 220 #endif /* _KERNEL */
 221
 222 #endif /* !LOCORE */
 223
 224 #endif /* !_MACHINE_PMAP_H_ */