1 /* $NetBSD: pmap.h,v 1.80 2026/04/22 08:27:18 skrll Exp $ */ 2 3 /* 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Ralph Campbell. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)pmap.h 8.1 (Berkeley) 6/10/93 35 */ 36 37 /* 38 * Copyright (c) 1987 Carnegie-Mellon University 39 * 40 * This code is derived from software contributed to Berkeley by 41 * Ralph Campbell. 42 * 43 * Redistribution and use in source and binary forms, with or without 44 * modification, are permitted provided that the following conditions 45 * are met: 46 * 1. Redistributions of source code must retain the above copyright 47 * notice, this list of conditions and the following disclaimer. 48 * 2. Redistributions in binary form must reproduce the above copyright 49 * notice, this list of conditions and the following disclaimer in the 50 * documentation and/or other materials provided with the distribution. 51 * 3. All advertising materials mentioning features or use of this software 52 * must display the following acknowledgement: 53 * This product includes software developed by the University of 54 * California, Berkeley and its contributors. 55 * 4. Neither the name of the University nor the names of its contributors 56 * may be used to endorse or promote products derived from this software 57 * without specific prior written permission. 58 * 59 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 60 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 61 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 62 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 63 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 64 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 65 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 66 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 67 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 68 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 69 * SUCH DAMAGE. 70 * 71 * @(#)pmap.h 8.1 (Berkeley) 6/10/93 72 */ 73 74 #ifndef _MIPS_PMAP_H_ 75 #define _MIPS_PMAP_H_ 76 77 #ifdef _KERNEL_OPT 78 #include "opt_multiprocessor.h" 79 #include "opt_uvmhist.h" 80 #include "opt_cputype.h" 81 #endif 82 83 #include <sys/evcnt.h> 84 #include <sys/kcpuset.h> 85 #include <sys/kernhist.h> 86 87 #ifndef __BSD_PTENTRY_T__ 88 #define __BSD_PTENTRY_T__ 89 typedef uint32_t pt_entry_t; 90 #define PRIxPTE PRIx32 91 #endif /* __BSD_PTENTRY_T__ */ 92 93 #define KERNEL_PID 0 94 95 #if defined(__PMAP_PRIVATE) 96 struct vm_page_md; 97 98 #include <mips/locore.h> 99 #include <mips/cache.h> 100 101 #define PMAP_VIRTUAL_CACHE_ALIASES 102 #define PMAP_INVALID_SEGTAB_ADDRESS ((pmap_segtab_t *)NULL) 103 #define PMAP_TLB_NEED_SHOOTDOWN 1 104 #define PMAP_TLB_FLUSH_ASID_ON_RESET false 105 #if UPAGES > 1 106 #define PMAP_TLB_WIRED_UPAGES MIPS3_TLB_WIRED_UPAGES 107 #endif 108 #define pmap_md_tlb_asid_max() (MIPS_TLB_NUM_PIDS - 1) 109 #ifdef MULTIPROCESSOR 110 #define PMAP_NO_PV_UNCACHED 111 #endif 112 113 /* 114 * We need the pmap_segtab's to be aligned on MIPS*R2 so we can use the 115 * EXT/INS instructions on their addresses. 116 */ 117 #if (MIPS32R2 + MIPS64R2 + MIPS64R2_RMIXL) > 0 118 #define PMAP_SEGTAB_ALIGN __aligned(sizeof(void *)*NSEGPG) __section(".data1") 119 #endif 120 121 #include <uvm/uvm_physseg.h> 122 123 void pmap_md_init(void); 124 void pmap_md_icache_sync_all(void); 125 void pmap_md_icache_sync_range_index(vaddr_t, vsize_t); 126 void pmap_md_page_syncicache(struct vm_page_md *, const kcpuset_t *); 127 bool pmap_md_vca_add(struct vm_page_md *, vaddr_t, pt_entry_t *); 128 void pmap_md_vca_clean(struct vm_page_md *, int); 129 void pmap_md_vca_remove(struct vm_page *, vaddr_t, bool, bool); 130 bool pmap_md_ok_to_steal_p(const uvm_physseg_t, size_t); 131 bool pmap_md_tlb_check_entry(void *, vaddr_t, tlb_asid_t, pt_entry_t); 132 133 static inline bool 134 pmap_md_virtual_cache_aliasing_p(void) 135 { 136 return MIPS_CACHE_VIRTUAL_ALIAS; 137 } 138 139 static inline vsize_t 140 pmap_md_cache_prefer_mask(void) 141 { 142 return MIPS_HAS_R4K_MMU ? mips_cache_info.mci_cache_prefer_mask : 0; 143 } 144 145 static inline void 146 pmap_md_asid_activate(tlb_asid_t asid, struct pmap *pm, struct lwp *l) 147 { 148 149 tlb_set_asid(asid, pm); 150 } 151 152 static inline void 153 pmap_md_asid_deactivate(struct pmap *pm) 154 { 155 156 tlb_set_asid(KERNEL_PID, pmap_kernel()); 157 } 158 159 #endif /* __PMAP_PRIVATE */ 160 161 // these use register_t so we can pass XKPHYS addresses to them on N32 162 bool pmap_md_direct_mapped_vaddr_p(register_t); 163 paddr_t pmap_md_direct_mapped_vaddr_to_paddr(register_t); 164 bool pmap_md_io_vaddr_p(vaddr_t); 165 166 static inline bool 167 pmap_md_kernel_vaddr_p(vaddr_t va) 168 { 169 return false; 170 } 171 172 static inline paddr_t 173 pmap_md_kernel_vaddr_to_paddr(vaddr_t vax) 174 { 175 /* Not used due to false from pmap_md_kernel_vaddr_p */ 176 177 return 0; 178 } 179 180 /* 181 * Alternate mapping hooks for pool pages. Avoids thrashing the TLB. 182 */ 183 vaddr_t pmap_md_map_poolpage(paddr_t, size_t); 184 paddr_t pmap_md_unmap_poolpage(vaddr_t, size_t); 185 struct vm_page *pmap_md_alloc_poolpage(int); 186 187 /* 188 * Other hooks for the pool allocator. 189 */ 190 paddr_t pmap_md_pool_vtophys(vaddr_t); 191 vaddr_t pmap_md_pool_phystov(paddr_t); 192 #define POOL_VTOPHYS(va) pmap_md_pool_vtophys((vaddr_t)va) 193 #define POOL_PHYSTOV(pa) pmap_md_pool_phystov((paddr_t)pa) 194 195 #define pmap_md_direct_map_paddr(pa) pmap_md_pool_phystov((paddr_t)pa) 196 197 struct tlbmask { 198 vaddr_t tlb_hi; 199 #ifdef __mips_o32 200 uint32_t tlb_lo0; 201 uint32_t tlb_lo1; 202 #else 203 uint64_t tlb_lo0; 204 uint64_t tlb_lo1; 205 #endif 206 uint32_t tlb_mask; 207 }; 208 209 #ifdef _LP64 210 #define PMAP_SEGTABSIZE NSEGPG 211 #else 212 #define PMAP_SEGTABSIZE (1 << (31 - SEGSHIFT)) 213 #endif 214 215 #include <uvm/uvm_pmap.h> 216 #include <uvm/pmap/vmpagemd.h> 217 #include <uvm/pmap/pmap.h> 218 #include <uvm/pmap/pmap_pvt.h> 219 #include <uvm/pmap/pmap_tlb.h> 220 #include <uvm/pmap/pmap_synci.h> 221 222 #ifdef _KERNEL 223 /* 224 * Select CCA to use for unmanaged pages. 225 */ 226 #define PMAP_CCA_FOR_PA(pa) CCA_UNCACHED /* uncached */ 227 228 #if defined(_MIPS_PADDR_T_64BIT) || defined(_LP64) 229 #define PGC_NOCACHE 0x4000000000000000ULL 230 #define PGC_PREFETCH 0x2000000000000000ULL 231 #endif 232 233 #if defined(__PMAP_PRIVATE) 234 #include <mips/pte.h> 235 #endif 236 237 /* 238 * The user address space is 2Gb (0x0 - 0x80000000). 239 * User programs are laid out in memory as follows: 240 * address 241 * USRTEXT 0x00001000 242 * USRDATA USRTEXT + text_size 243 * USRSTACK 0x7FFFFFFF 244 * 245 * The user address space is mapped using a two level structure where 246 * virtual address bits 30..22 are used to index into a segment table which 247 * points to a page worth of PTEs (4096 page can hold 1024 PTEs). 248 * Bits 21..12 are then used to index a PTE which describes a page within 249 * a segment. 250 * 251 * The wired entries in the TLB will contain the following: 252 * 0-1 (UPAGES) for curproc user struct and kernel stack. 253 * 254 * Note: The kernel doesn't use the same data structures as user programs. 255 * All the PTE entries are stored in a single array in Sysmap which is 256 * dynamically allocated at boot time. 257 */ 258 259 #define pmap_phys_address(x) mips_ptob(x) 260 261 /* 262 * Bootstrap the system enough to run with virtual memory. 263 */ 264 void pmap_bootstrap(void); 265 void pmap_md_alloc_ephemeral_address_space(struct cpu_info *); 266 void pmap_procwr(struct proc *, vaddr_t, size_t); 267 #define PMAP_NEED_PROCWR 268 269 /* 270 * pmap_prefer() helps reduce virtual-coherency exceptions in 271 * the virtually-indexed cache on mips3 CPUs. 272 */ 273 #ifdef MIPS3_PLUS 274 #define PMAP_PREFER(pa, va, sz, td) pmap_prefer((pa), (va), (sz), (td)) 275 void pmap_prefer(vaddr_t, vaddr_t *, vsize_t, int); 276 #endif /* MIPS3_PLUS */ 277 278 #define PMAP_ENABLE_PMAP_KMPAGE /* enable the PMAP_KMPAGE flag */ 279 280 #ifdef MIPS64_SB1 281 /* uncached accesses are bad; all accesses should be cached (and coherent) */ 282 #undef PMAP_PAGEIDLEZERO 283 #define PMAP_PAGEIDLEZERO(pa) (pmap_zero_page(pa), true) 284 285 int sbmips_cca_for_pa(paddr_t); 286 287 #undef PMAP_CCA_FOR_PA 288 #define PMAP_CCA_FOR_PA(pa) sbmips_cca_for_pa(pa) 289 #endif 290 291 #ifdef __HAVE_PMAP_PV_TRACK 292 struct pmap_page { 293 struct vm_page_md pp_md; 294 }; 295 296 #define PMAP_PAGE_TO_MD(ppage) (&((ppage)->pp_md)) 297 #endif 298 299 #endif /* _KERNEL */ 300 #endif /* _MIPS_PMAP_H_ */ 301
Indexes created Sun Aug 30 00:27:18 UTC 2026