The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

FreeBSD/Linux Kernel Cross Reference
sys/mips/include/pmap.h

Version: -  FREEBSD  -  FREEBSD-13-STABLE  -  FREEBSD-13-0  -  FREEBSD-12-STABLE  -  FREEBSD-12-0  -  FREEBSD-11-STABLE  -  FREEBSD-11-0  -  FREEBSD-10-STABLE  -  FREEBSD-10-0  -  FREEBSD-9-STABLE  -  FREEBSD-9-0  -  FREEBSD-8-STABLE  -  FREEBSD-8-0  -  FREEBSD-7-STABLE  -  FREEBSD-7-0  -  FREEBSD-6-STABLE  -  FREEBSD-6-0  -  FREEBSD-5-STABLE  -  FREEBSD-5-0  -  FREEBSD-4-STABLE  -  FREEBSD-3-STABLE  -  FREEBSD22  -  l41  -  OPENBSD  -  linux-2.6  -  MK84  -  PLAN9  -  xnu-8792 
SearchContext: -  none  -  3  -  10 

    1 /*-
    2  * SPDX-License-Identifier: BSD-3-Clause
    3  *
    4  * Copyright (c) 1991 Regents of the University of California.
    5  * All rights reserved.
    6  *
    7  * This code is derived from software contributed to Berkeley by
    8  * the Systems Programming Group of the University of Utah Computer
    9  * Science Department and William Jolitz of UUNET Technologies Inc.
   10  *
   11  * Redistribution and use in source and binary forms, with or without
   12  * modification, are permitted provided that the following conditions
   13  * are met:
   14  * 1. Redistributions of source code must retain the above copyright
   15  *    notice, this list of conditions and the following disclaimer.
   16  * 2. Redistributions in binary form must reproduce the above copyright
   17  *    notice, this list of conditions and the following disclaimer in the
   18  *    documentation and/or other materials provided with the distribution.
   19  * 3. Neither the name of the University nor the names of its contributors
   20  *    may be used to endorse or promote products derived from this software
   21  *    without specific prior written permission.
   22  *
   23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   33  * SUCH DAMAGE.
   34  *
   35  * Derived from hp300 version by Mike Hibler, this version by William
   36  * Jolitz uses a recursive map [a pde points to the page directory] to
   37  * map the page tables using the pagetables themselves. This is done to
   38  * reduce the impact on kernel virtual memory for lots of sparse address
   39  * space, and to reduce the cost of memory to each process.
   40  *
   41  *      from: hp300: @(#)pmap.h 7.2 (Berkeley) 12/16/90
   42  *      from: @(#)pmap.h        7.4 (Berkeley) 5/12/91
   43  *      from: src/sys/i386/include/pmap.h,v 1.65.2.2 2000/11/30 01:54:42 peter
   44  *      JNPR: pmap.h,v 1.7.2.1 2007/09/10 07:44:12 girish
   45  *      $FreeBSD$
   46  */
   47 
   48 #ifndef _MACHINE_PMAP_H_
   49 #define _MACHINE_PMAP_H_
   50 
   51 #include <vm/vm_param.h>
   52 #include <machine/pte.h>
   53 
   54 #if defined(__mips_n32) || defined(__mips_n64) /* PHYSADDR_64BIT */
   55 #define NKPT            256     /* mem > 4G, vm_page_startup needs more KPTs */
   56 #else
   57 #define NKPT            120     /* actual number of kernel page tables */
   58 #endif
   59 
   60 #ifndef LOCORE
   61 
   62 #include <sys/queue.h>
   63 #include <sys/_cpuset.h>
   64 #include <sys/_lock.h>
   65 #include <sys/_mutex.h>
   66 
   67 /*
   68  * Pmap stuff
   69  */
   70 struct pv_entry;
   71 struct pv_chunk;
   72 
   73 struct md_page {
   74         int pv_flags;
   75         TAILQ_HEAD(, pv_entry) pv_list;
   76 };
   77 
   78 #define PV_TABLE_REF            0x02    /* referenced */
   79 #define PV_MEMATTR_MASK         0xf0    /* store vm_memattr_t here */
   80 #define PV_MEMATTR_SHIFT        0x04
   81 
   82 #define ASID_BITS               8
   83 #define ASIDGEN_BITS            (32 - ASID_BITS)
   84 #define ASIDGEN_MASK            ((1 << ASIDGEN_BITS) - 1)
   85 
   86 struct pmap {
   87         pd_entry_t *pm_segtab;  /* KVA of segment table */
   88         TAILQ_HEAD(, pv_chunk)  pm_pvchunk;     /* list of mappings in pmap */
   89         cpuset_t        pm_active;              /* active on cpus */
   90         struct {
   91                 u_int32_t asid:ASID_BITS;       /* TLB address space tag */
   92                 u_int32_t gen:ASIDGEN_BITS;     /* its generation number */
   93         }      pm_asid[MAXSMPCPU];
   94         struct pmap_statistics pm_stats;        /* pmap statistics */
   95         struct mtx pm_mtx;
   96 };
   97 
   98 typedef struct pmap *pmap_t;
   99 
  100 #ifdef  _KERNEL
  101 
  102 pt_entry_t *pmap_pte(pmap_t, vm_offset_t);
  103 vm_paddr_t pmap_kextract(vm_offset_t va);
  104 
  105 #define vtophys(va)     pmap_kextract(((vm_offset_t) (va)))
  106 #define pmap_asid(pmap) (pmap)->pm_asid[PCPU_GET(cpuid)].asid
  107 
  108 extern struct pmap      kernel_pmap_store;
  109 #define kernel_pmap     (&kernel_pmap_store)
  110 
  111 #define PMAP_LOCK(pmap)         mtx_lock(&(pmap)->pm_mtx)
  112 #define PMAP_LOCK_ASSERT(pmap, type)    mtx_assert(&(pmap)->pm_mtx, (type))
  113 #define PMAP_LOCK_DESTROY(pmap) mtx_destroy(&(pmap)->pm_mtx)
  114 #define PMAP_LOCK_INIT(pmap)    mtx_init(&(pmap)->pm_mtx, "pmap", \
  115                                     NULL, MTX_DEF)
  116 #define PMAP_LOCKED(pmap)       mtx_owned(&(pmap)->pm_mtx)
  117 #define PMAP_MTX(pmap)          (&(pmap)->pm_mtx)
  118 #define PMAP_TRYLOCK(pmap)      mtx_trylock(&(pmap)->pm_mtx)
  119 #define PMAP_UNLOCK(pmap)       mtx_unlock(&(pmap)->pm_mtx)
  120 
  121 /*
  122  * For each vm_page_t, there is a list of all currently valid virtual
  123  * mappings of that page.  An entry is a pv_entry_t, the list is pv_table.
  124  */
  125 typedef struct pv_entry {
  126         vm_offset_t pv_va;      /* virtual address for mapping */
  127         TAILQ_ENTRY(pv_entry) pv_list;
  128 }       *pv_entry_t;
  129 
  130 /*
  131  * pv_entries are allocated in chunks per-process.  This avoids the
  132  * need to track per-pmap assignments.
  133  */
  134 #ifdef __mips_n64
  135 #define _NPCM   3
  136 #define _NPCPV  168
  137 #else
  138 #define _NPCM   11
  139 #define _NPCPV  336
  140 #endif
  141 struct pv_chunk {
  142         pmap_t                  pc_pmap;
  143         TAILQ_ENTRY(pv_chunk)   pc_list;
  144         u_long                  pc_map[_NPCM];  /* bitmap; 1 = free */
  145         TAILQ_ENTRY(pv_chunk)   pc_lru;
  146         struct pv_entry         pc_pventry[_NPCPV];
  147 };
  148 
  149 /*
  150  * physmem_desc[] is a superset of phys_avail[] and describes all the
  151  * memory present in the system.
  152  *
  153  * phys_avail[] is similar but does not include the memory stolen by
  154  * pmap_steal_memory().
  155  *
  156  * Each memory region is described by a pair of elements in the array
  157  * so we can describe up to (PHYS_AVAIL_ENTRIES / 2) distinct memory
  158  * regions.
  159  */
  160 extern vm_paddr_t physmem_desc[PHYS_AVAIL_COUNT];
  161 
  162 extern vm_offset_t virtual_avail;
  163 extern vm_offset_t virtual_end;
  164 
  165 #define pmap_page_get_memattr(m) (((m)->md.pv_flags & PV_MEMATTR_MASK) >> PV_MEMATTR_SHIFT)
  166 #define pmap_page_is_mapped(m)  (!TAILQ_EMPTY(&(m)->md.pv_list))
  167 #define pmap_page_is_write_mapped(m)    (((m)->a.flags & PGA_WRITEABLE) != 0)
  168 
  169 void pmap_bootstrap(void);
  170 void *pmap_mapdev(vm_paddr_t, vm_size_t);
  171 void *pmap_mapdev_attr(vm_paddr_t, vm_size_t, vm_memattr_t);
  172 void pmap_unmapdev(vm_offset_t, vm_size_t);
  173 vm_offset_t pmap_steal_memory(vm_size_t size);
  174 void pmap_kenter(vm_offset_t va, vm_paddr_t pa);
  175 void pmap_kenter_attr(vm_offset_t va, vm_paddr_t pa, vm_memattr_t attr);
  176 void pmap_kenter_device(vm_offset_t, vm_size_t, vm_paddr_t);
  177 void pmap_kremove(vm_offset_t va);
  178 void pmap_kremove_device(vm_offset_t, vm_size_t);
  179 void *pmap_kenter_temporary(vm_paddr_t pa, int i);
  180 void pmap_kenter_temporary_free(vm_paddr_t pa);
  181 void pmap_flush_pvcache(vm_page_t m);
  182 int pmap_emulate_modified(pmap_t pmap, vm_offset_t va);
  183 void pmap_page_set_memattr(vm_page_t, vm_memattr_t);
  184 int pmap_change_attr(vm_offset_t, vm_size_t, vm_memattr_t);
  185 
  186 static inline int
  187 pmap_vmspace_copy(pmap_t dst_pmap __unused, pmap_t src_pmap __unused)
  188 {
  189 
  190         return (0);
  191 }
  192 
  193 #endif                          /* _KERNEL */
  194 
  195 #endif                          /* !LOCORE */
  196 
  197 #endif                          /* !_MACHINE_PMAP_H_ */

Cache object: caded9a93aa6077a6d26b1f9094aabce


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]


This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.