pmap.h revision 217345
1187301Sgonzo/*- 2178172Simp * Copyright (c) 1991 Regents of the University of California. 3178172Simp * All rights reserved. 4178172Simp * 5178172Simp * This code is derived from software contributed to Berkeley by 6178172Simp * the Systems Programming Group of the University of Utah Computer 7178172Simp * Science Department and William Jolitz of UUNET Technologies Inc. 8178172Simp * 9178172Simp * Redistribution and use in source and binary forms, with or without 10178172Simp * modification, are permitted provided that the following conditions 11178172Simp * are met: 12178172Simp * 1. Redistributions of source code must retain the above copyright 13178172Simp * notice, this list of conditions and the following disclaimer. 14178172Simp * 2. Redistributions in binary form must reproduce the above copyright 15178172Simp * notice, this list of conditions and the following disclaimer in the 16178172Simp * documentation and/or other materials provided with the distribution. 17178172Simp * 4. Neither the name of the University nor the names of its contributors 18178172Simp * may be used to endorse or promote products derived from this software 19178172Simp * without specific prior written permission. 20178172Simp * 21178172Simp * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22178172Simp * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23178172Simp * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24178172Simp * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25178172Simp * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26178172Simp * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27178172Simp * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28178172Simp * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29178172Simp * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30178172Simp * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31178172Simp * SUCH DAMAGE. 32178172Simp * 33178172Simp * Derived from hp300 version by Mike Hibler, this version by William 34178172Simp * Jolitz uses a recursive map [a pde points to the page directory] to 35178172Simp * map the page tables using the pagetables themselves. This is done to 36178172Simp * reduce the impact on kernel virtual memory for lots of sparse address 37178172Simp * space, and to reduce the cost of memory to each process. 38178172Simp * 39178172Simp * from: hp300: @(#)pmap.h 7.2 (Berkeley) 12/16/90 40178172Simp * from: @(#)pmap.h 7.4 (Berkeley) 5/12/91 41178172Simp * from: src/sys/i386/include/pmap.h,v 1.65.2.2 2000/11/30 01:54:42 peter 42178172Simp * JNPR: pmap.h,v 1.7.2.1 2007/09/10 07:44:12 girish 43178172Simp * $FreeBSD: head/sys/mips/include/pmap.h 217345 2011-01-13 06:48:43Z jchandra $ 44178172Simp */ 45178172Simp 46178172Simp#ifndef _MACHINE_PMAP_H_ 47178172Simp#define _MACHINE_PMAP_H_ 48178172Simp 49178172Simp#include <machine/vmparam.h> 50187301Sgonzo#include <machine/pte.h> 51178172Simp 52178172Simp#define NKPT 120 /* actual number of kernel page tables */ 53178172Simp 54178172Simp#ifndef LOCORE 55178172Simp 56178172Simp#include <sys/queue.h> 57178172Simp#include <sys/_lock.h> 58178172Simp#include <sys/_mutex.h> 59178172Simp 60178172Simp/* 61178172Simp * Pmap stuff 62178172Simp */ 63178172Simpstruct pv_entry; 64178172Simp 65178172Simpstruct md_page { 66178172Simp int pv_list_count; 67178172Simp int pv_flags; 68191735Salc TAILQ_HEAD(, pv_entry) pv_list; 69178172Simp}; 70178172Simp 71178172Simp#define PV_TABLE_MOD 0x01 /* modified */ 72178172Simp#define PV_TABLE_REF 0x02 /* referenced */ 73178172Simp 74178172Simp#define ASID_BITS 8 75178172Simp#define ASIDGEN_BITS (32 - ASID_BITS) 76178172Simp#define ASIDGEN_MASK ((1 << ASIDGEN_BITS) - 1) 77178172Simp 78178172Simpstruct pmap { 79178172Simp pd_entry_t *pm_segtab; /* KVA of segment table */ 80191735Salc TAILQ_HEAD(, pv_entry) pm_pvlist; /* list of mappings in 81191735Salc * pmap */ 82207410Skmacy uint32_t pm_gen_count; /* generation count (pmap lock dropped) */ 83207410Skmacy u_int pm_retries; 84211197Sjhb cpumask_t pm_active; /* active on cpus */ 85178172Simp struct { 86178172Simp u_int32_t asid:ASID_BITS; /* TLB address space tag */ 87178172Simp u_int32_t gen:ASIDGEN_BITS; /* its generation number */ 88178172Simp } pm_asid[MAXSMPCPU]; 89178172Simp struct pmap_statistics pm_stats; /* pmap statistics */ 90178172Simp struct vm_page *pm_ptphint; /* pmap ptp hint */ 91178172Simp struct mtx pm_mtx; 92178172Simp}; 93178172Simp 94178172Simptypedef struct pmap *pmap_t; 95178172Simp 96187301Sgonzo#ifdef _KERNEL 97178172Simp 98178172Simppt_entry_t *pmap_pte(pmap_t, vm_offset_t); 99178172Simpvm_offset_t pmap_kextract(vm_offset_t va); 100178172Simp 101178172Simp#define vtophys(va) pmap_kextract(((vm_offset_t) (va))) 102209243Sjchandra#define pmap_asid(pmap) (pmap)->pm_asid[PCPU_GET(cpuid)].asid 103178172Simp 104191735Salcextern struct pmap kernel_pmap_store; 105191735Salc#define kernel_pmap (&kernel_pmap_store) 106191735Salc 107178172Simp#define PMAP_LOCK(pmap) mtx_lock(&(pmap)->pm_mtx) 108178172Simp#define PMAP_LOCK_ASSERT(pmap, type) mtx_assert(&(pmap)->pm_mtx, (type)) 109178172Simp#define PMAP_LOCK_DESTROY(pmap) mtx_destroy(&(pmap)->pm_mtx) 110178172Simp#define PMAP_LOCK_INIT(pmap) mtx_init(&(pmap)->pm_mtx, "pmap", \ 111178172Simp NULL, MTX_DEF) 112178172Simp#define PMAP_LOCKED(pmap) mtx_owned(&(pmap)->pm_mtx) 113178172Simp#define PMAP_MTX(pmap) (&(pmap)->pm_mtx) 114178172Simp#define PMAP_TRYLOCK(pmap) mtx_trylock(&(pmap)->pm_mtx) 115178172Simp#define PMAP_UNLOCK(pmap) mtx_unlock(&(pmap)->pm_mtx) 116178172Simp 117178172Simp/* 118178172Simp * For each vm_page_t, there is a list of all currently valid virtual 119178172Simp * mappings of that page. An entry is a pv_entry_t, the list is pv_table. 120178172Simp */ 121178172Simptypedef struct pv_entry { 122178172Simp pmap_t pv_pmap; /* pmap where mapping lies */ 123178172Simp vm_offset_t pv_va; /* virtual address for mapping */ 124191735Salc TAILQ_ENTRY(pv_entry) pv_list; 125191735Salc TAILQ_ENTRY(pv_entry) pv_plist; 126178172Simp vm_page_t pv_ptem; /* VM page for pte */ 127178172Simp} *pv_entry_t; 128178172Simp 129202031Simp/* 130202031Simp * physmem_desc[] is a superset of phys_avail[] and describes all the 131202031Simp * memory present in the system. 132202031Simp * 133202031Simp * phys_avail[] is similar but does not include the memory stolen by 134202031Simp * pmap_steal_memory(). 135202031Simp * 136202031Simp * Each memory region is described by a pair of elements in the array 137202031Simp * so we can describe up to (PHYS_AVAIL_ENTRIES / 2) distinct memory 138202031Simp * regions. 139202031Simp */ 140202031Simp#define PHYS_AVAIL_ENTRIES 10 141217345Sjchandraextern vm_paddr_t phys_avail[PHYS_AVAIL_ENTRIES + 2]; 142217345Sjchandraextern vm_paddr_t physmem_desc[PHYS_AVAIL_ENTRIES + 2]; 143202031Simp 144178172Simpextern vm_offset_t virtual_avail; 145178172Simpextern vm_offset_t virtual_end; 146178172Simp 147214903Sgonzoextern vm_paddr_t dump_avail[PHYS_AVAIL_ENTRIES + 2]; 148214903Sgonzo 149195649Salc#define pmap_page_get_memattr(m) VM_MEMATTR_DEFAULT 150178172Simp#define pmap_page_is_mapped(m) (!TAILQ_EMPTY(&(m)->md.pv_list)) 151195649Salc#define pmap_page_set_memattr(m, ma) (void)0 152178172Simp 153178172Simpvoid pmap_bootstrap(void); 154217345Sjchandravoid *pmap_mapdev(vm_paddr_t, vm_size_t); 155178172Simpvoid pmap_unmapdev(vm_offset_t, vm_size_t); 156178172Simpvm_offset_t pmap_steal_memory(vm_size_t size); 157217345Sjchandraint page_is_managed(vm_paddr_t pa); 158187327Simpvoid pmap_kenter(vm_offset_t va, vm_paddr_t pa); 159212989Sneelvoid pmap_kenter_attr(vm_offset_t va, vm_paddr_t pa, int attr); 160187327Simpvoid pmap_kremove(vm_offset_t va); 161178172Simpvoid *pmap_kenter_temporary(vm_paddr_t pa, int i); 162178172Simpvoid pmap_kenter_temporary_free(vm_paddr_t pa); 163178172Simpint pmap_compute_pages_to_dump(void); 164202031Simpvoid pmap_flush_pvcache(vm_page_t m); 165211217Sjchandraint pmap_emulate_modified(pmap_t pmap, vm_offset_t va); 166216315Sjchandravoid pmap_grow_direct_page_cache(void); 167216315Sjchandravm_page_t pmap_alloc_direct_page(unsigned int index, int req); 168216315Sjchandra 169178172Simp#endif /* _KERNEL */ 170178172Simp 171178172Simp#endif /* !LOCORE */ 172178172Simp 173178172Simp#endif /* !_MACHINE_PMAP_H_ */ 174