1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause AND BSD-4-Clause 3 * 4 * Copyright (C) 2006 Semihalf, Marian Balakowicz <m8@semihalf.com> 5 * All rights reserved. 6 * 7 * Adapted for Freescale's e500 core CPUs. 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. The name of the author may not be used to endorse or promote products 18 * derived from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN 23 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED 25 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 26 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 27 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 28 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 29 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 * 31 * $FreeBSD$ 32 */ 33 /*- 34 * Copyright (C) 1995, 1996 Wolfgang Solfrank. 35 * Copyright (C) 1995, 1996 TooLs GmbH. 36 * All rights reserved. 37 * 38 * Redistribution and use in source and binary forms, with or without 39 * modification, are permitted provided that the following conditions 40 * are met: 41 * 1. Redistributions of source code must retain the above copyright 42 * notice, this list of conditions and the following disclaimer. 43 * 2. Redistributions in binary form must reproduce the above copyright 44 * notice, this list of conditions and the following disclaimer in the 45 * documentation and/or other materials provided with the distribution. 46 * 3. All advertising materials mentioning features or use of this software 47 * must display the following acknowledgement: 48 * This product includes software developed by TooLs GmbH. 49 * 4. The name of TooLs GmbH may not be used to endorse or promote products 50 * derived from this software without specific prior written permission. 51 * 52 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR 53 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 54 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 55 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 56 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 57 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 58 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 59 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 60 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 61 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 62 * 63 * from: $NetBSD: pmap.h,v 1.17 2000/03/30 16:18:24 jdolecek Exp $ 64 */ 65 66 #ifndef _MACHINE_PMAP_H_ 67 #define _MACHINE_PMAP_H_ 68 69 #include <sys/queue.h> 70 #include <sys/tree.h> 71 #include <sys/_cpuset.h> 72 #include <sys/_lock.h> 73 #include <sys/_mutex.h> 74 #include <machine/sr.h> 75 #include <machine/pte.h> 76 #include <machine/slb.h> 77 #include <machine/tlb.h> 78 #include <machine/vmparam.h> 79 #ifdef __powerpc64__ 80 #include <vm/vm_radix.h> 81 #endif 82 83 /* 84 * The radix page table structure is described by levels 1-4. 85 * See Fig 33. on p. 1002 of Power ISA v3.0B 86 * 87 * Page directories and tables must be size aligned. 88 */ 89 90 /* Root page directory - 64k -- each entry covers 512GB */ 91 typedef uint64_t pml1_entry_t; 92 /* l2 page directory - 4k -- each entry covers 1GB */ 93 typedef uint64_t pml2_entry_t; 94 /* l3 page directory - 4k -- each entry covers 2MB */ 95 typedef uint64_t pml3_entry_t; 96 /* l4 page directory - 256B/4k -- each entry covers 64k/4k */ 97 typedef uint64_t pml4_entry_t; 98 99 typedef uint64_t pt_entry_t; 100 101 struct pmap; 102 typedef struct pmap *pmap_t; 103 104 #define PMAP_ENTER_QUICK_LOCKED 0x10000000 105 106 #if !defined(NPMAPS) 107 #define NPMAPS 32768 108 #endif /* !defined(NPMAPS) */ 109 110 struct slbtnode; 111 112 struct pvo_entry { 113 LIST_ENTRY(pvo_entry) pvo_vlink; /* Link to common virt page */ 114 #ifndef __powerpc64__ 115 LIST_ENTRY(pvo_entry) pvo_olink; /* Link to overflow entry */ 116 #endif 117 union { 118 RB_ENTRY(pvo_entry) pvo_plink; /* Link to pmap entries */ 119 SLIST_ENTRY(pvo_entry) pvo_dlink; /* Link to delete enty */ 120 }; 121 struct { 122 #ifndef __powerpc64__ 123 /* 32-bit fields */ 124 pte_t pte; 125 #endif 126 /* 64-bit fields */ 127 uintptr_t slot; 128 vm_paddr_t pa; 129 vm_prot_t prot; 130 } pvo_pte; 131 pmap_t pvo_pmap; /* Owning pmap */ 132 vm_offset_t pvo_vaddr; /* VA of entry */ 133 uint64_t pvo_vpn; /* Virtual page number */ 134 }; 135 LIST_HEAD(pvo_head, pvo_entry); 136 SLIST_HEAD(pvo_dlist, pvo_entry); 137 RB_HEAD(pvo_tree, pvo_entry); 138 int pvo_vaddr_compare(struct pvo_entry *, struct pvo_entry *); 139 RB_PROTOTYPE(pvo_tree, pvo_entry, pvo_plink, pvo_vaddr_compare); 140 141 /* Used by 32-bit PMAP */ 142 #define PVO_PTEGIDX_MASK 0x007UL /* which PTEG slot */ 143 #define PVO_PTEGIDX_VALID 0x008UL /* slot is valid */ 144 /* Used by 64-bit PMAP */ 145 #define PVO_HID 0x008UL /* PVO entry in alternate hash*/ 146 /* Used by both */ 147 #define PVO_WIRED 0x010UL /* PVO entry is wired */ 148 #define PVO_MANAGED 0x020UL /* PVO entry is managed */ 149 #define PVO_BOOTSTRAP 0x080UL /* PVO entry allocated during 150 bootstrap */ 151 #define PVO_DEAD 0x100UL /* waiting to be deleted */ 152 #define PVO_LARGE 0x200UL /* large page */ 153 #define PVO_VADDR(pvo) ((pvo)->pvo_vaddr & ~ADDR_POFF) 154 #define PVO_PTEGIDX_GET(pvo) ((pvo)->pvo_vaddr & PVO_PTEGIDX_MASK) 155 #define PVO_PTEGIDX_ISSET(pvo) ((pvo)->pvo_vaddr & PVO_PTEGIDX_VALID) 156 #define PVO_PTEGIDX_CLR(pvo) \ 157 ((void)((pvo)->pvo_vaddr &= ~(PVO_PTEGIDX_VALID|PVO_PTEGIDX_MASK))) 158 #define PVO_PTEGIDX_SET(pvo, i) \ 159 ((void)((pvo)->pvo_vaddr |= (i)|PVO_PTEGIDX_VALID)) 160 #define PVO_VSID(pvo) ((pvo)->pvo_vpn >> 16) 161 162 struct pmap { 163 struct pmap_statistics pm_stats; 164 struct mtx pm_mtx; 165 cpuset_t pm_active; 166 union { 167 struct { 168 #ifdef __powerpc64__ 169 struct slbtnode *pm_slb_tree_root; 170 struct slb **pm_slb; 171 int pm_slb_len; 172 #else 173 register_t pm_sr[16]; 174 #endif 175 176 struct pmap *pmap_phys; 177 struct pvo_tree pmap_pvo; 178 }; 179 #ifdef __powerpc64__ 180 /* Radix support */ 181 struct { 182 pml1_entry_t *pm_pml1; /* KVA of root page directory */ 183 struct vm_radix pm_radix; /* spare page table pages */ 184 TAILQ_HEAD(,pv_chunk) pm_pvchunk; /* list of mappings in pmap */ 185 uint64_t pm_pid; /* PIDR value */ 186 int pm_flags; 187 }; 188 #endif 189 struct { 190 /* TID to identify this pmap entries in TLB */ 191 tlbtid_t pm_tid[MAXCPU]; 192 193 #ifdef __powerpc64__ 194 /* 195 * Page table directory, 196 * array of pointers to page directories. 197 */ 198 pte_t ****pm_root; 199 #else 200 /* 201 * Page table directory, 202 * array of pointers to page tables. 203 */ 204 pte_t **pm_pdir; 205 206 /* List of allocated ptbl bufs (ptbl kva regions). */ 207 TAILQ_HEAD(, ptbl_buf) pm_ptbl_list; 208 #endif 209 }; 210 } __aligned(CACHE_LINE_SIZE); 211 }; 212 213 /* 214 * pv_entries are allocated in chunks per-process. This avoids the 215 * need to track per-pmap assignments. 216 */ 217 #define _NPCPV 126 218 #define _NPCM howmany(_NPCPV, 64) 219 220 #define PV_CHUNK_HEADER \ 221 pmap_t pc_pmap; \ 222 TAILQ_ENTRY(pv_chunk) pc_list; \ 223 uint64_t pc_map[_NPCM]; /* bitmap; 1 = free */ \ 224 TAILQ_ENTRY(pv_chunk) pc_lru; 225 226 struct pv_entry { 227 pmap_t pv_pmap; 228 vm_offset_t pv_va; 229 TAILQ_ENTRY(pv_entry) pv_link; 230 }; 231 typedef struct pv_entry *pv_entry_t; 232 233 struct pv_chunk_header { 234 PV_CHUNK_HEADER 235 }; 236 struct pv_chunk { 237 PV_CHUNK_HEADER 238 uint64_t reserved; 239 struct pv_entry pc_pventry[_NPCPV]; 240 }; 241 242 struct md_page { 243 union { 244 struct { 245 volatile int32_t mdpg_attrs; 246 vm_memattr_t mdpg_cache_attrs; 247 struct pvo_head mdpg_pvoh; 248 int pv_gen; /* (p) */ 249 }; 250 struct { 251 int pv_tracked; 252 }; 253 }; 254 TAILQ_HEAD(, pv_entry) pv_list; /* (p) */ 255 }; 256 257 #ifdef AIM 258 #define pmap_page_get_memattr(m) ((m)->md.mdpg_cache_attrs) 259 #else 260 #define pmap_page_get_memattr(m) VM_MEMATTR_DEFAULT 261 #endif /* AIM */ 262 263 /* 264 * Return the VSID corresponding to a given virtual address. 265 * If no VSID is currently defined, it will allocate one, and add 266 * it to a free slot if available. 267 * 268 * NB: The PMAP MUST be locked already. 269 */ 270 uint64_t va_to_vsid(pmap_t pm, vm_offset_t va); 271 272 /* Lock-free, non-allocating lookup routines */ 273 uint64_t kernel_va_to_slbv(vm_offset_t va); 274 struct slb *user_va_to_slb_entry(pmap_t pm, vm_offset_t va); 275 276 uint64_t allocate_user_vsid(pmap_t pm, uint64_t esid, int large); 277 void free_vsid(pmap_t pm, uint64_t esid, int large); 278 void slb_insert_user(pmap_t pm, struct slb *slb); 279 void slb_insert_kernel(uint64_t slbe, uint64_t slbv); 280 281 struct slbtnode *slb_alloc_tree(void); 282 void slb_free_tree(pmap_t pm); 283 struct slb **slb_alloc_user_cache(void); 284 void slb_free_user_cache(struct slb **); 285 286 extern struct pmap kernel_pmap_store; 287 #define kernel_pmap (&kernel_pmap_store) 288 289 #ifdef _KERNEL 290 291 #define PMAP_LOCK(pmap) mtx_lock(&(pmap)->pm_mtx) 292 #define PMAP_LOCK_ASSERT(pmap, type) \ 293 mtx_assert(&(pmap)->pm_mtx, (type)) 294 #define PMAP_LOCK_DESTROY(pmap) mtx_destroy(&(pmap)->pm_mtx) 295 #define PMAP_LOCK_INIT(pmap) mtx_init(&(pmap)->pm_mtx, \ 296 (pmap == kernel_pmap) ? "kernelpmap" : \ 297 "pmap", NULL, MTX_DEF | MTX_DUPOK) 298 #define PMAP_LOCKED(pmap) mtx_owned(&(pmap)->pm_mtx) 299 #define PMAP_MTX(pmap) (&(pmap)->pm_mtx) 300 #define PMAP_TRYLOCK(pmap) mtx_trylock(&(pmap)->pm_mtx) 301 #define PMAP_UNLOCK(pmap) mtx_unlock(&(pmap)->pm_mtx) 302 303 #define pmap_page_is_write_mapped(m) (((m)->a.flags & PGA_WRITEABLE) != 0) 304 305 #define pmap_vm_page_alloc_check(m) 306 307 void pmap_bootstrap(vm_offset_t, vm_offset_t); 308 void pmap_kenter(vm_offset_t va, vm_paddr_t pa); 309 void pmap_kenter_attr(vm_offset_t va, vm_paddr_t pa, vm_memattr_t); 310 void pmap_kremove(vm_offset_t); 311 void *pmap_mapdev(vm_paddr_t, vm_size_t); 312 void *pmap_mapdev_attr(vm_paddr_t, vm_size_t, vm_memattr_t); 313 void pmap_unmapdev(vm_offset_t, vm_size_t); 314 void pmap_page_set_memattr(vm_page_t, vm_memattr_t); 315 int pmap_change_attr(vm_offset_t, vm_size_t, vm_memattr_t); 316 int pmap_map_user_ptr(pmap_t pm, volatile const void *uaddr, 317 void **kaddr, size_t ulen, size_t *klen); 318 int pmap_decode_kernel_ptr(vm_offset_t addr, int *is_user, 319 vm_offset_t *decoded_addr); 320 void pmap_deactivate(struct thread *); 321 vm_paddr_t pmap_kextract(vm_offset_t); 322 int pmap_dev_direct_mapped(vm_paddr_t, vm_size_t); 323 boolean_t pmap_mmu_install(char *name, int prio); 324 void pmap_mmu_init(void); 325 const char *pmap_mmu_name(void); 326 bool pmap_ps_enabled(pmap_t pmap); 327 int pmap_nofault(pmap_t pmap, vm_offset_t va, vm_prot_t flags); 328 boolean_t pmap_page_is_mapped(vm_page_t m); 329 330 void pmap_page_array_startup(long count); 331 332 #define vtophys(va) pmap_kextract((vm_offset_t)(va)) 333 334 extern vm_offset_t virtual_avail; 335 extern vm_offset_t virtual_end; 336 extern caddr_t crashdumpmap; 337 338 extern vm_offset_t msgbuf_phys; 339 340 extern int pmap_bootstrapped; 341 extern int radix_mmu; 342 extern int superpages_enabled; 343 344 #ifdef AIM 345 void pmap_early_io_map_init(void); 346 #endif 347 vm_offset_t pmap_early_io_map(vm_paddr_t pa, vm_size_t size); 348 void pmap_early_io_unmap(vm_offset_t va, vm_size_t size); 349 void pmap_track_page(pmap_t pmap, vm_offset_t va); 350 void pmap_page_print_mappings(vm_page_t m); 351 void pmap_tlbie_all(void); 352 353 static inline int 354 pmap_vmspace_copy(pmap_t dst_pmap __unused, pmap_t src_pmap __unused) 355 { 356 357 return (0); 358 } 359 360 #endif 361 362 #endif /* !_MACHINE_PMAP_H_ */ 363