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 * $FreeBSD$ 44178172Simp */ 45178172Simp 46178172Simp#ifndef _MACHINE_PMAP_H_ 47178172Simp#define _MACHINE_PMAP_H_ 48178172Simp 49178172Simp#include <machine/vmparam.h> 50187301Sgonzo#include <machine/pte.h> 51178172Simp 52219122Sjchandra#if defined(__mips_n32) || defined(__mips_n64) /* PHYSADDR_64BIT */ 53219122Sjchandra#define NKPT 256 /* mem > 4G, vm_page_startup needs more KPTs */ 54219122Sjchandra#else 55178172Simp#define NKPT 120 /* actual number of kernel page tables */ 56219122Sjchandra#endif 57178172Simp 58178172Simp#ifndef LOCORE 59178172Simp 60178172Simp#include <sys/queue.h> 61222813Sattilio#include <sys/_cpuset.h> 62178172Simp#include <sys/_lock.h> 63178172Simp#include <sys/_mutex.h> 64178172Simp 65178172Simp/* 66178172Simp * Pmap stuff 67178172Simp */ 68178172Simpstruct pv_entry; 69239236Salcstruct pv_chunk; 70178172Simp 71178172Simpstruct md_page { 72178172Simp int pv_flags; 73191735Salc TAILQ_HEAD(, pv_entry) pv_list; 74178172Simp}; 75178172Simp 76178172Simp#define PV_TABLE_REF 0x02 /* referenced */ 77289699Sian#define PV_MEMATTR_UNCACHEABLE 0x04 78178172Simp 79178172Simp#define ASID_BITS 8 80178172Simp#define ASIDGEN_BITS (32 - ASID_BITS) 81178172Simp#define ASIDGEN_MASK ((1 << ASIDGEN_BITS) - 1) 82178172Simp 83178172Simpstruct pmap { 84178172Simp pd_entry_t *pm_segtab; /* KVA of segment table */ 85239236Salc TAILQ_HEAD(, pv_chunk) pm_pvchunk; /* list of mappings in pmap */ 86222813Sattilio cpuset_t pm_active; /* active on cpus */ 87178172Simp struct { 88178172Simp u_int32_t asid:ASID_BITS; /* TLB address space tag */ 89178172Simp u_int32_t gen:ASIDGEN_BITS; /* its generation number */ 90178172Simp } pm_asid[MAXSMPCPU]; 91178172Simp struct pmap_statistics pm_stats; /* pmap statistics */ 92178172Simp struct mtx pm_mtx; 93178172Simp}; 94178172Simp 95178172Simptypedef struct pmap *pmap_t; 96178172Simp 97187301Sgonzo#ifdef _KERNEL 98178172Simp 99178172Simppt_entry_t *pmap_pte(pmap_t, vm_offset_t); 100233381Sgonzovm_paddr_t pmap_kextract(vm_offset_t va); 101178172Simp 102178172Simp#define vtophys(va) pmap_kextract(((vm_offset_t) (va))) 103209243Sjchandra#define pmap_asid(pmap) (pmap)->pm_asid[PCPU_GET(cpuid)].asid 104178172Simp 105191735Salcextern struct pmap kernel_pmap_store; 106191735Salc#define kernel_pmap (&kernel_pmap_store) 107191735Salc 108178172Simp#define PMAP_LOCK(pmap) mtx_lock(&(pmap)->pm_mtx) 109178172Simp#define PMAP_LOCK_ASSERT(pmap, type) mtx_assert(&(pmap)->pm_mtx, (type)) 110178172Simp#define PMAP_LOCK_DESTROY(pmap) mtx_destroy(&(pmap)->pm_mtx) 111178172Simp#define PMAP_LOCK_INIT(pmap) mtx_init(&(pmap)->pm_mtx, "pmap", \ 112178172Simp NULL, MTX_DEF) 113178172Simp#define PMAP_LOCKED(pmap) mtx_owned(&(pmap)->pm_mtx) 114178172Simp#define PMAP_MTX(pmap) (&(pmap)->pm_mtx) 115178172Simp#define PMAP_TRYLOCK(pmap) mtx_trylock(&(pmap)->pm_mtx) 116178172Simp#define PMAP_UNLOCK(pmap) mtx_unlock(&(pmap)->pm_mtx) 117178172Simp 118178172Simp/* 119178172Simp * For each vm_page_t, there is a list of all currently valid virtual 120178172Simp * mappings of that page. An entry is a pv_entry_t, the list is pv_table. 121178172Simp */ 122178172Simptypedef struct pv_entry { 123178172Simp vm_offset_t pv_va; /* virtual address for mapping */ 124191735Salc TAILQ_ENTRY(pv_entry) pv_list; 125178172Simp} *pv_entry_t; 126178172Simp 127202031Simp/* 128239236Salc * pv_entries are allocated in chunks per-process. This avoids the 129239236Salc * need to track per-pmap assignments. 130239236Salc */ 131239236Salc#ifdef __mips_n64 132239236Salc#define _NPCM 3 133239236Salc#define _NPCPV 168 134239236Salc#else 135239236Salc#define _NPCM 11 136239236Salc#define _NPCPV 336 137239236Salc#endif 138239236Salcstruct pv_chunk { 139239236Salc pmap_t pc_pmap; 140239236Salc TAILQ_ENTRY(pv_chunk) pc_list; 141239236Salc u_long pc_map[_NPCM]; /* bitmap; 1 = free */ 142239236Salc TAILQ_ENTRY(pv_chunk) pc_lru; 143239236Salc struct pv_entry pc_pventry[_NPCPV]; 144239236Salc}; 145239236Salc 146239236Salc/* 147202031Simp * physmem_desc[] is a superset of phys_avail[] and describes all the 148202031Simp * memory present in the system. 149202031Simp * 150202031Simp * phys_avail[] is similar but does not include the memory stolen by 151202031Simp * pmap_steal_memory(). 152202031Simp * 153202031Simp * Each memory region is described by a pair of elements in the array 154202031Simp * so we can describe up to (PHYS_AVAIL_ENTRIES / 2) distinct memory 155202031Simp * regions. 156202031Simp */ 157202031Simp#define PHYS_AVAIL_ENTRIES 10 158217345Sjchandraextern vm_paddr_t phys_avail[PHYS_AVAIL_ENTRIES + 2]; 159217345Sjchandraextern vm_paddr_t physmem_desc[PHYS_AVAIL_ENTRIES + 2]; 160202031Simp 161178172Simpextern vm_offset_t virtual_avail; 162178172Simpextern vm_offset_t virtual_end; 163178172Simp 164214903Sgonzoextern vm_paddr_t dump_avail[PHYS_AVAIL_ENTRIES + 2]; 165214903Sgonzo 166195649Salc#define pmap_page_get_memattr(m) VM_MEMATTR_DEFAULT 167178172Simp#define pmap_page_is_mapped(m) (!TAILQ_EMPTY(&(m)->md.pv_list)) 168237168Salc#define pmap_page_is_write_mapped(m) (((m)->aflags & PGA_WRITEABLE) != 0) 169178172Simp 170178172Simpvoid pmap_bootstrap(void); 171217345Sjchandravoid *pmap_mapdev(vm_paddr_t, vm_size_t); 172178172Simpvoid pmap_unmapdev(vm_offset_t, vm_size_t); 173178172Simpvm_offset_t pmap_steal_memory(vm_size_t size); 174187327Simpvoid pmap_kenter(vm_offset_t va, vm_paddr_t pa); 175212989Sneelvoid pmap_kenter_attr(vm_offset_t va, vm_paddr_t pa, int attr); 176187327Simpvoid pmap_kremove(vm_offset_t va); 177178172Simpvoid *pmap_kenter_temporary(vm_paddr_t pa, int i); 178178172Simpvoid pmap_kenter_temporary_free(vm_paddr_t pa); 179202031Simpvoid pmap_flush_pvcache(vm_page_t m); 180211217Sjchandraint pmap_emulate_modified(pmap_t pmap, vm_offset_t va); 181289699Sianvoid pmap_page_set_memattr(vm_page_t, vm_memattr_t); 182216315Sjchandra 183178172Simp#endif /* _KERNEL */ 184178172Simp 185178172Simp#endif /* !LOCORE */ 186178172Simp 187178172Simp#endif /* !_MACHINE_PMAP_H_ */ 188