1 /* 2 * Copyright (c) 1991 Regents of the University of California. 3 * Copyright (c) 2003 Peter Wemm. 4 * Copyright (c) 2008 The DragonFly Project. 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. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the University of 22 * California, Berkeley and its contributors. 23 * 4. Neither the name of the University nor the names of its contributors 24 * may be used to endorse or promote products derived from this software 25 * without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 37 * SUCH DAMAGE. 38 * 39 * Derived from hp300 version by Mike Hibler, this version by William 40 * Jolitz uses a recursive map [a pde points to the page directory] to 41 * map the page tables using the pagetables themselves. This is done to 42 * reduce the impact on kernel virtual memory for lots of sparse address 43 * space, and to reduce the cost of memory to each process. 44 * 45 * from: hp300: @(#)pmap.h 7.2 (Berkeley) 12/16/90 46 * from: @(#)pmap.h 7.4 (Berkeley) 5/12/91 47 * $FreeBSD: src/sys/i386/include/pmap.h,v 1.65.2.3 2001/10/03 07:15:37 peter Exp $ 48 * $DragonFly: src/sys/platform/pc64/include/pmap.h,v 1.1 2008/08/29 17:07:17 dillon Exp $ 49 */ 50 51 #ifndef _MACHINE_PMAP_H_ 52 #define _MACHINE_PMAP_H_ 53 54 #include <cpu/pmap.h> 55 56 /* 57 * Size of Kernel address space. This is the number of page table pages 58 * (2MB each) to use for the kernel. 256 pages == 512 Megabyte. 59 * This **MUST** be a multiple of 4 (eg: 252, 256, 260, etc). 60 */ 61 #ifndef KVA_PAGES 62 #define KVA_PAGES 256 63 #endif 64 65 /* 66 * Pte related macros. This is complicated by having to deal with 67 * the sign extension of the 48th bit. 68 */ 69 #define KVADDR(l4, l3, l2, l1) ( \ 70 ((unsigned long)-1 << 47) | \ 71 ((unsigned long)(l4) << PML4SHIFT) | \ 72 ((unsigned long)(l3) << PDPSHIFT) | \ 73 ((unsigned long)(l2) << PDRSHIFT) | \ 74 ((unsigned long)(l1) << PAGE_SHIFT)) 75 76 #define UVADDR(l4, l3, l2, l1) ( \ 77 ((unsigned long)(l4) << PML4SHIFT) | \ 78 ((unsigned long)(l3) << PDPSHIFT) | \ 79 ((unsigned long)(l2) << PDRSHIFT) | \ 80 ((unsigned long)(l1) << PAGE_SHIFT)) 81 82 /* 83 * NOTE: We no longer hardwire NKPT, it is calculated in create_pagetables() 84 */ 85 #define NKPML4E 1 /* number of kernel PML4 slots */ 86 /* NKPDPE defined in vmparam.h */ 87 88 #define NUPML4E (NPML4EPG/2) /* number of userland PML4 pages */ 89 #define NUPDPE (NUPML4E*NPDPEPG)/* number of userland PDP pages */ 90 #define NUPDE (NUPDPE*NPDEPG) /* number of userland PD entries */ 91 92 #define NDMPML4E 1 /* number of dmap PML4 slots */ 93 94 /* 95 * The *PML4I values control the layout of virtual memory 96 */ 97 #define PML4PML4I (NPML4EPG/2) /* Index of recursive pml4 mapping */ 98 99 #define KPML4I (NPML4EPG-1) /* Top 512GB for KVM */ 100 #define DMPML4I (KPML4I-1) /* Next 512GB down for direct map */ 101 102 #define KPDPI (NPDPEPG-2) /* kernbase at -2GB */ 103 104 /* per-CPU data is at -2MB */ 105 /* XXX can the kernel decide to use this memory for something else? */ 106 #define MPPML4I KPML4I 107 #define MPPDPI KPDPI 108 #define MPPTDI (NPDEPG-1) 109 110 /* 111 * XXX doesn't really belong here I guess... 112 */ 113 #define ISA_HOLE_START 0xa0000 114 #define ISA_HOLE_LENGTH (0x100000-ISA_HOLE_START) 115 116 #ifndef LOCORE 117 118 #ifndef _SYS_TYPES_H_ 119 #include <sys/types.h> 120 #endif 121 #ifndef _SYS_QUEUE_H_ 122 #include <sys/queue.h> 123 #endif 124 #ifndef _MACHINE_TYPES_H_ 125 #include <machine/types.h> 126 #endif 127 #ifndef _MACHINE_PARAM_H_ 128 #include <machine/param.h> 129 #endif 130 131 /* 132 * Address of current and alternate address space page table maps 133 * and directories. 134 */ 135 #ifdef _KERNEL 136 #define addr_PTmap (KVADDR(PML4PML4I, 0, 0, 0)) 137 #define addr_PDmap (KVADDR(PML4PML4I, PML4PML4I, 0, 0)) 138 #define addr_PDPmap (KVADDR(PML4PML4I, PML4PML4I, PML4PML4I, 0)) 139 #define addr_PML4map (KVADDR(PML4PML4I, PML4PML4I, PML4PML4I, PML4PML4I)) 140 #define addr_PML4pml4e (addr_PML4map + (PML4PML4I * sizeof(pml4_entry_t))) 141 #define PTmap ((pt_entry_t *)(addr_PTmap)) 142 #define PDmap ((pd_entry_t *)(addr_PDmap)) 143 #define PDPmap ((pd_entry_t *)(addr_PDPmap)) 144 #define PML4map ((pd_entry_t *)(addr_PML4map)) 145 #define PML4pml4e ((pd_entry_t *)(addr_PML4pml4e)) 146 147 extern u_int64_t KPML4phys; /* physical address of kernel level 4 */ 148 #endif 149 150 #ifdef _KERNEL 151 152 /* 153 * XXX 154 */ 155 #define vtophys(va) pmap_kextract(((vm_offset_t)(va))) 156 #define vtophys_pte(va) ((pt_entry_t)pmap_kextract(((vm_offset_t)(va)))) 157 158 #endif 159 160 #define pte_load_clear(pte) atomic_readandclear_long(pte) 161 162 static __inline void 163 pte_store(pt_entry_t *ptep, pt_entry_t pte) 164 { 165 166 *ptep = pte; 167 } 168 169 #define pde_store(pdep, pde) pte_store((pdep), (pde)) 170 171 /* 172 * Pmap stuff 173 */ 174 struct pv_entry; 175 struct vm_page; 176 struct vm_object; 177 struct vmspace; 178 179 struct md_page { 180 int pv_list_count; 181 TAILQ_HEAD(,pv_entry) pv_list; 182 }; 183 184 /* 185 * Each machine dependent implementation is expected to 186 * keep certain statistics. They may do this anyway they 187 * so choose, but are expected to return the statistics 188 * in the following structure. 189 * 190 * NOTE: We try to match the size of the pc32 pmap with the vkernel pmap 191 * so the same utilities (like 'ps') can be used on both. 192 */ 193 struct pmap_statistics { 194 long resident_count; /* # of pages mapped (total) */ 195 long wired_count; /* # of pages wired */ 196 }; 197 typedef struct pmap_statistics *pmap_statistics_t; 198 199 struct pmap { 200 pml4_entry_t *pm_pml4; /* KVA of level 4 page table */ 201 struct vm_page *pm_pdirm; /* VM page for pg directory */ 202 struct vm_object *pm_pteobj; /* Container for pte's */ 203 TAILQ_ENTRY(pmap) pm_pmnode; /* list of pmaps */ 204 TAILQ_HEAD(,pv_entry) pm_pvlist; /* list of mappings in pmap */ 205 int pm_count; /* reference count */ 206 cpumask_t pm_active; /* active on cpus */ 207 int pm_filler02; /* (filler sync w/vkernel) */ 208 struct pmap_statistics pm_stats; /* pmap statistics */ 209 struct vm_page *pm_ptphint; /* pmap ptp hint */ 210 int pm_generation; /* detect pvlist deletions */ 211 }; 212 213 #define CPUMASK_LOCK (1 << SMP_MAXCPU) 214 215 #define pmap_resident_count(pmap) (pmap)->pm_stats.resident_count 216 217 typedef struct pmap *pmap_t; 218 219 #ifdef _KERNEL 220 extern struct pmap kernel_pmap; 221 #endif 222 223 /* 224 * For each vm_page_t, there is a list of all currently valid virtual 225 * mappings of that page. An entry is a pv_entry_t, the list is pv_table. 226 */ 227 typedef struct pv_entry { 228 pmap_t pv_pmap; /* pmap where mapping lies */ 229 vm_offset_t pv_va; /* virtual address for mapping */ 230 TAILQ_ENTRY(pv_entry) pv_list; 231 TAILQ_ENTRY(pv_entry) pv_plist; 232 struct vm_page *pv_ptem; /* VM page for pte */ 233 } *pv_entry_t; 234 235 #ifdef _KERNEL 236 237 #define NPPROVMTRR 8 238 #define PPRO_VMTRRphysBase0 0x200 239 #define PPRO_VMTRRphysMask0 0x201 240 struct ppro_vmtrr { 241 u_int64_t base, mask; 242 }; 243 extern struct ppro_vmtrr PPro_vmtrr[NPPROVMTRR]; 244 245 extern caddr_t CADDR1; 246 extern pt_entry_t *CMAP1; 247 extern vm_paddr_t dump_avail[]; 248 extern vm_paddr_t avail_end; 249 extern vm_paddr_t avail_start; 250 extern vm_offset_t clean_eva; 251 extern vm_offset_t clean_sva; 252 extern char *ptvmmap; /* poor name! */ 253 254 void pmap_interlock_wait (struct vmspace *); 255 void pmap_bootstrap (vm_paddr_t *); 256 void *pmap_mapdev (vm_paddr_t, vm_size_t); 257 void *pmap_mapdev_uncacheable(vm_paddr_t, vm_size_t); 258 void pmap_unmapdev (vm_offset_t, vm_size_t); 259 struct vm_page *pmap_use_pt (pmap_t, vm_offset_t); 260 #ifdef SMP 261 void pmap_set_opt (void); 262 #endif 263 vm_paddr_t pmap_kextract(vm_offset_t); 264 265 #endif /* _KERNEL */ 266 267 #endif /* !LOCORE */ 268 269 #endif /* !_MACHINE_PMAP_H_ */ 270