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 79 struct pmap; 80 typedef struct pmap *pmap_t; 81 82 #if defined(AIM) 83 84 #if !defined(NPMAPS) 85 #define NPMAPS 32768 86 #endif /* !defined(NPMAPS) */ 87 88 struct slbtnode; 89 90 struct pvo_entry { 91 LIST_ENTRY(pvo_entry) pvo_vlink; /* Link to common virt page */ 92 #ifndef __powerpc64__ 93 LIST_ENTRY(pvo_entry) pvo_olink; /* Link to overflow entry */ 94 #endif 95 RB_ENTRY(pvo_entry) pvo_plink; /* Link to pmap entries */ 96 struct { 97 #ifndef __powerpc64__ 98 /* 32-bit fields */ 99 struct pte pte; 100 #endif 101 /* 64-bit fields */ 102 uintptr_t slot; 103 vm_paddr_t pa; 104 vm_prot_t prot; 105 } pvo_pte; 106 pmap_t pvo_pmap; /* Owning pmap */ 107 vm_offset_t pvo_vaddr; /* VA of entry */ 108 uint64_t pvo_vpn; /* Virtual page number */ 109 }; 110 LIST_HEAD(pvo_head, pvo_entry); 111 RB_HEAD(pvo_tree, pvo_entry); 112 int pvo_vaddr_compare(struct pvo_entry *, struct pvo_entry *); 113 RB_PROTOTYPE(pvo_tree, pvo_entry, pvo_plink, pvo_vaddr_compare); 114 115 /* Used by 32-bit PMAP */ 116 #define PVO_PTEGIDX_MASK 0x007UL /* which PTEG slot */ 117 #define PVO_PTEGIDX_VALID 0x008UL /* slot is valid */ 118 /* Used by 64-bit PMAP */ 119 #define PVO_HID 0x008UL /* PVO entry in alternate hash*/ 120 /* Used by both */ 121 #define PVO_WIRED 0x010UL /* PVO entry is wired */ 122 #define PVO_MANAGED 0x020UL /* PVO entry is managed */ 123 #define PVO_BOOTSTRAP 0x080UL /* PVO entry allocated during 124 bootstrap */ 125 #define PVO_DEAD 0x100UL /* waiting to be deleted */ 126 #define PVO_LARGE 0x200UL /* large page */ 127 #define PVO_VADDR(pvo) ((pvo)->pvo_vaddr & ~ADDR_POFF) 128 #define PVO_PTEGIDX_GET(pvo) ((pvo)->pvo_vaddr & PVO_PTEGIDX_MASK) 129 #define PVO_PTEGIDX_ISSET(pvo) ((pvo)->pvo_vaddr & PVO_PTEGIDX_VALID) 130 #define PVO_PTEGIDX_CLR(pvo) \ 131 ((void)((pvo)->pvo_vaddr &= ~(PVO_PTEGIDX_VALID|PVO_PTEGIDX_MASK))) 132 #define PVO_PTEGIDX_SET(pvo, i) \ 133 ((void)((pvo)->pvo_vaddr |= (i)|PVO_PTEGIDX_VALID)) 134 #define PVO_VSID(pvo) ((pvo)->pvo_vpn >> 16) 135 136 struct pmap { 137 struct pmap_statistics pm_stats; 138 struct mtx pm_mtx; 139 140 #ifdef __powerpc64__ 141 struct slbtnode *pm_slb_tree_root; 142 struct slb **pm_slb; 143 int pm_slb_len; 144 #else 145 register_t pm_sr[16]; 146 #endif 147 cpuset_t pm_active; 148 149 struct pmap *pmap_phys; 150 struct pvo_tree pmap_pvo; 151 }; 152 153 struct md_page { 154 volatile int32_t mdpg_attrs; 155 vm_memattr_t mdpg_cache_attrs; 156 struct pvo_head mdpg_pvoh; 157 }; 158 159 #define pmap_page_get_memattr(m) ((m)->md.mdpg_cache_attrs) 160 #define pmap_page_is_mapped(m) (!LIST_EMPTY(&(m)->md.mdpg_pvoh)) 161 162 /* 163 * Return the VSID corresponding to a given virtual address. 164 * If no VSID is currently defined, it will allocate one, and add 165 * it to a free slot if available. 166 * 167 * NB: The PMAP MUST be locked already. 168 */ 169 uint64_t va_to_vsid(pmap_t pm, vm_offset_t va); 170 171 /* Lock-free, non-allocating lookup routines */ 172 uint64_t kernel_va_to_slbv(vm_offset_t va); 173 struct slb *user_va_to_slb_entry(pmap_t pm, vm_offset_t va); 174 175 uint64_t allocate_user_vsid(pmap_t pm, uint64_t esid, int large); 176 void free_vsid(pmap_t pm, uint64_t esid, int large); 177 void slb_insert_user(pmap_t pm, struct slb *slb); 178 void slb_insert_kernel(uint64_t slbe, uint64_t slbv); 179 180 struct slbtnode *slb_alloc_tree(void); 181 void slb_free_tree(pmap_t pm); 182 struct slb **slb_alloc_user_cache(void); 183 void slb_free_user_cache(struct slb **); 184 185 #elif defined(BOOKE) 186 187 struct pmap { 188 struct pmap_statistics pm_stats; /* pmap statistics */ 189 struct mtx pm_mtx; /* pmap mutex */ 190 tlbtid_t pm_tid[MAXCPU]; /* TID to identify this pmap entries in TLB */ 191 cpuset_t pm_active; /* active on cpus */ 192 193 #ifdef __powerpc64__ 194 /* Page table directory, array of pointers to page directories. */ 195 pte_t **pm_pp2d[PP2D_NENTRIES]; 196 197 /* List of allocated pdir bufs (pdir kva regions). */ 198 TAILQ_HEAD(, ptbl_buf) pm_pdir_list; 199 #else 200 /* Page table directory, array of pointers to page tables. */ 201 pte_t *pm_pdir[PDIR_NENTRIES]; 202 #endif 203 204 /* List of allocated ptbl bufs (ptbl kva regions). */ 205 TAILQ_HEAD(, ptbl_buf) pm_ptbl_list; 206 }; 207 208 struct pv_entry { 209 pmap_t pv_pmap; 210 vm_offset_t pv_va; 211 TAILQ_ENTRY(pv_entry) pv_link; 212 }; 213 typedef struct pv_entry *pv_entry_t; 214 215 struct md_page { 216 TAILQ_HEAD(, pv_entry) pv_list; 217 int pv_tracked; 218 }; 219 220 #define pmap_page_get_memattr(m) VM_MEMATTR_DEFAULT 221 #define pmap_page_is_mapped(m) (!TAILQ_EMPTY(&(m)->md.pv_list)) 222 223 #else 224 /* 225 * Common pmap members between AIM and BOOKE. 226 * libkvm needs pm_stats at the same location between both, as it doesn't define 227 * AIM nor BOOKE, and is expected to work across all. 228 */ 229 struct pmap { 230 struct pmap_statistics pm_stats; /* pmap statistics */ 231 struct mtx pm_mtx; /* pmap mutex */ 232 }; 233 #endif /* AIM */ 234 235 extern struct pmap kernel_pmap_store; 236 #define kernel_pmap (&kernel_pmap_store) 237 238 #ifdef _KERNEL 239 240 #define PMAP_LOCK(pmap) mtx_lock(&(pmap)->pm_mtx) 241 #define PMAP_LOCK_ASSERT(pmap, type) \ 242 mtx_assert(&(pmap)->pm_mtx, (type)) 243 #define PMAP_LOCK_DESTROY(pmap) mtx_destroy(&(pmap)->pm_mtx) 244 #define PMAP_LOCK_INIT(pmap) mtx_init(&(pmap)->pm_mtx, \ 245 (pmap == kernel_pmap) ? "kernelpmap" : \ 246 "pmap", NULL, MTX_DEF) 247 #define PMAP_LOCKED(pmap) mtx_owned(&(pmap)->pm_mtx) 248 #define PMAP_MTX(pmap) (&(pmap)->pm_mtx) 249 #define PMAP_TRYLOCK(pmap) mtx_trylock(&(pmap)->pm_mtx) 250 #define PMAP_UNLOCK(pmap) mtx_unlock(&(pmap)->pm_mtx) 251 252 #define pmap_page_is_write_mapped(m) (((m)->aflags & PGA_WRITEABLE) != 0) 253 254 void pmap_bootstrap(vm_offset_t, vm_offset_t); 255 void pmap_kenter(vm_offset_t va, vm_paddr_t pa); 256 void pmap_kenter_attr(vm_offset_t va, vm_paddr_t pa, vm_memattr_t); 257 void pmap_kremove(vm_offset_t); 258 void *pmap_mapdev(vm_paddr_t, vm_size_t); 259 void *pmap_mapdev_attr(vm_paddr_t, vm_size_t, vm_memattr_t); 260 void pmap_unmapdev(vm_offset_t, vm_size_t); 261 void pmap_page_set_memattr(vm_page_t, vm_memattr_t); 262 int pmap_change_attr(vm_offset_t, vm_size_t, vm_memattr_t); 263 int pmap_map_user_ptr(pmap_t pm, volatile const void *uaddr, 264 void **kaddr, size_t ulen, size_t *klen); 265 int pmap_decode_kernel_ptr(vm_offset_t addr, int *is_user, 266 vm_offset_t *decoded_addr); 267 void pmap_deactivate(struct thread *); 268 vm_paddr_t pmap_kextract(vm_offset_t); 269 int pmap_dev_direct_mapped(vm_paddr_t, vm_size_t); 270 boolean_t pmap_mmu_install(char *name, int prio); 271 272 #define vtophys(va) pmap_kextract((vm_offset_t)(va)) 273 274 #define PHYS_AVAIL_SZ 256 /* Allows up to 16GB Ram on pSeries with 275 * logical memory block size of 64MB. 276 * For more Ram increase the lmb or this value. 277 */ 278 279 extern vm_paddr_t phys_avail[PHYS_AVAIL_SZ]; 280 extern vm_offset_t virtual_avail; 281 extern vm_offset_t virtual_end; 282 283 extern vm_offset_t msgbuf_phys; 284 285 extern int pmap_bootstrapped; 286 287 vm_offset_t pmap_early_io_map(vm_paddr_t pa, vm_size_t size); 288 void pmap_early_io_unmap(vm_offset_t va, vm_size_t size); 289 void pmap_track_page(pmap_t pmap, vm_offset_t va); 290 291 #endif 292 293 #endif /* !_MACHINE_PMAP_H_ */ 294