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(NPMAPS) 83 #define NPMAPS 32768 84 #endif /* !defined(NPMAPS) */ 85 86 struct slbtnode; 87 88 struct pvo_entry { 89 LIST_ENTRY(pvo_entry) pvo_vlink; /* Link to common virt page */ 90 #ifndef __powerpc64__ 91 LIST_ENTRY(pvo_entry) pvo_olink; /* Link to overflow entry */ 92 #endif 93 RB_ENTRY(pvo_entry) pvo_plink; /* Link to pmap entries */ 94 struct { 95 #ifndef __powerpc64__ 96 /* 32-bit fields */ 97 pte_t pte; 98 #endif 99 /* 64-bit fields */ 100 uintptr_t slot; 101 vm_paddr_t pa; 102 vm_prot_t prot; 103 } pvo_pte; 104 pmap_t pvo_pmap; /* Owning pmap */ 105 vm_offset_t pvo_vaddr; /* VA of entry */ 106 uint64_t pvo_vpn; /* Virtual page number */ 107 }; 108 LIST_HEAD(pvo_head, pvo_entry); 109 RB_HEAD(pvo_tree, pvo_entry); 110 int pvo_vaddr_compare(struct pvo_entry *, struct pvo_entry *); 111 RB_PROTOTYPE(pvo_tree, pvo_entry, pvo_plink, pvo_vaddr_compare); 112 113 /* Used by 32-bit PMAP */ 114 #define PVO_PTEGIDX_MASK 0x007UL /* which PTEG slot */ 115 #define PVO_PTEGIDX_VALID 0x008UL /* slot is valid */ 116 /* Used by 64-bit PMAP */ 117 #define PVO_HID 0x008UL /* PVO entry in alternate hash*/ 118 /* Used by both */ 119 #define PVO_WIRED 0x010UL /* PVO entry is wired */ 120 #define PVO_MANAGED 0x020UL /* PVO entry is managed */ 121 #define PVO_BOOTSTRAP 0x080UL /* PVO entry allocated during 122 bootstrap */ 123 #define PVO_DEAD 0x100UL /* waiting to be deleted */ 124 #define PVO_LARGE 0x200UL /* large page */ 125 #define PVO_VADDR(pvo) ((pvo)->pvo_vaddr & ~ADDR_POFF) 126 #define PVO_PTEGIDX_GET(pvo) ((pvo)->pvo_vaddr & PVO_PTEGIDX_MASK) 127 #define PVO_PTEGIDX_ISSET(pvo) ((pvo)->pvo_vaddr & PVO_PTEGIDX_VALID) 128 #define PVO_PTEGIDX_CLR(pvo) \ 129 ((void)((pvo)->pvo_vaddr &= ~(PVO_PTEGIDX_VALID|PVO_PTEGIDX_MASK))) 130 #define PVO_PTEGIDX_SET(pvo, i) \ 131 ((void)((pvo)->pvo_vaddr |= (i)|PVO_PTEGIDX_VALID)) 132 #define PVO_VSID(pvo) ((pvo)->pvo_vpn >> 16) 133 134 struct pmap { 135 struct pmap_statistics pm_stats; 136 struct mtx pm_mtx; 137 cpuset_t pm_active; 138 union { 139 #ifdef AIM 140 struct { 141 142 #ifdef __powerpc64__ 143 struct slbtnode *pm_slb_tree_root; 144 struct slb **pm_slb; 145 int pm_slb_len; 146 #else 147 register_t pm_sr[16]; 148 #endif 149 150 struct pmap *pmap_phys; 151 struct pvo_tree pmap_pvo; 152 }; 153 #endif 154 #ifdef BOOKE 155 struct { 156 /* TID to identify this pmap entries in TLB */ 157 tlbtid_t pm_tid[MAXCPU]; 158 159 #ifdef __powerpc64__ 160 /* 161 * Page table directory, 162 * array of pointers to page directories. 163 */ 164 pte_t **pm_pp2d[PP2D_NENTRIES]; 165 166 /* List of allocated pdir bufs (pdir kva regions). */ 167 TAILQ_HEAD(, ptbl_buf) pm_pdir_list; 168 #else 169 /* 170 * Page table directory, 171 * array of pointers to page tables. 172 */ 173 pte_t *pm_pdir[PDIR_NENTRIES]; 174 #endif 175 176 /* List of allocated ptbl bufs (ptbl kva regions). */ 177 TAILQ_HEAD(, ptbl_buf) pm_ptbl_list; 178 }; 179 #endif 180 }; 181 }; 182 183 struct pv_entry { 184 pmap_t pv_pmap; 185 vm_offset_t pv_va; 186 TAILQ_ENTRY(pv_entry) pv_link; 187 }; 188 typedef struct pv_entry *pv_entry_t; 189 190 struct md_page { 191 union { 192 struct { 193 volatile int32_t mdpg_attrs; 194 vm_memattr_t mdpg_cache_attrs; 195 struct pvo_head mdpg_pvoh; 196 }; 197 struct { 198 TAILQ_HEAD(, pv_entry) pv_list; 199 int pv_tracked; 200 }; 201 }; 202 }; 203 204 #ifdef AIM 205 #define pmap_page_get_memattr(m) ((m)->md.mdpg_cache_attrs) 206 #define pmap_page_is_mapped(m) (!LIST_EMPTY(&(m)->md.mdpg_pvoh)) 207 #else 208 #define pmap_page_get_memattr(m) VM_MEMATTR_DEFAULT 209 #define pmap_page_is_mapped(m) (!TAILQ_EMPTY(&(m)->md.pv_list)) 210 #endif 211 212 /* 213 * Return the VSID corresponding to a given virtual address. 214 * If no VSID is currently defined, it will allocate one, and add 215 * it to a free slot if available. 216 * 217 * NB: The PMAP MUST be locked already. 218 */ 219 uint64_t va_to_vsid(pmap_t pm, vm_offset_t va); 220 221 /* Lock-free, non-allocating lookup routines */ 222 uint64_t kernel_va_to_slbv(vm_offset_t va); 223 struct slb *user_va_to_slb_entry(pmap_t pm, vm_offset_t va); 224 225 uint64_t allocate_user_vsid(pmap_t pm, uint64_t esid, int large); 226 void free_vsid(pmap_t pm, uint64_t esid, int large); 227 void slb_insert_user(pmap_t pm, struct slb *slb); 228 void slb_insert_kernel(uint64_t slbe, uint64_t slbv); 229 230 struct slbtnode *slb_alloc_tree(void); 231 void slb_free_tree(pmap_t pm); 232 struct slb **slb_alloc_user_cache(void); 233 void slb_free_user_cache(struct slb **); 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 static inline int 292 pmap_vmspace_copy(pmap_t dst_pmap __unused, pmap_t src_pmap __unused) 293 { 294 295 return (0); 296 } 297 298 #endif 299 300 #endif /* !_MACHINE_PMAP_H_ */ 301