1 /* $NetBSD: pmap_motorola.h,v 1.43 2023/12/31 21:59:24 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 1991, 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 * the Systems Programming Group of the University of Utah Computer 9 * Science Department. 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. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * @(#)pmap.h 8.1 (Berkeley) 6/10/93 36 */ 37 38 /* 39 * Copyright (c) 1987 Carnegie-Mellon University 40 * 41 * This code is derived from software contributed to Berkeley by 42 * the Systems Programming Group of the University of Utah Computer 43 * Science Department. 44 * 45 * Redistribution and use in source and binary forms, with or without 46 * modification, are permitted provided that the following conditions 47 * are met: 48 * 1. Redistributions of source code must retain the above copyright 49 * notice, this list of conditions and the following disclaimer. 50 * 2. Redistributions in binary form must reproduce the above copyright 51 * notice, this list of conditions and the following disclaimer in the 52 * documentation and/or other materials provided with the distribution. 53 * 3. All advertising materials mentioning features or use of this software 54 * must display the following acknowledgement: 55 * This product includes software developed by the University of 56 * California, Berkeley and its contributors. 57 * 4. Neither the name of the University nor the names of its contributors 58 * may be used to endorse or promote products derived from this software 59 * without specific prior written permission. 60 * 61 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 62 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 63 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 64 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 65 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 66 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 67 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 68 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 69 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 70 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 71 * SUCH DAMAGE. 72 * 73 * @(#)pmap.h 8.1 (Berkeley) 6/10/93 74 */ 75 76 #ifndef _M68K_PMAP_MOTOROLA_H_ 77 #define _M68K_PMAP_MOTOROLA_H_ 78 79 #ifdef _KERNEL_OPT 80 #include "opt_m68k_arch.h" 81 #endif 82 83 #include <machine/cpu.h> 84 #include <machine/pte.h> 85 86 /* 87 * Pmap stuff 88 */ 89 struct pmap { 90 pt_entry_t *pm_ptab; /* KVA of page table */ 91 st_entry_t *pm_stab; /* KVA of segment table */ 92 u_int pm_stfree; /* 040: free lev2 blocks */ 93 st_entry_t *pm_stpa; /* 040: ST phys addr */ 94 uint16_t pm_sref; /* segment table ref count */ 95 u_int pm_count; /* pmap reference count */ 96 struct pmap_statistics pm_stats; /* pmap statistics */ 97 int pm_ptpages; /* more stats: PT pages */ 98 }; 99 100 /* 101 * Root Pointer attributes for Supervisor and User modes. 102 * 103 * Supervisor: 104 * - No index limit (Lower limit == 0) 105 * - Points to Short format descriptor table. 106 * - Shared Globally 107 * 108 * User: 109 * - No index limit (Lower limit == 0) 110 * - Points to Short format descriptor table. 111 */ 112 #define MMU51_SRP_BITS (DTE51_LOWER | DTE51_SG | DT51_SHORT) 113 #define MMU51_CRP_BITS (DTE51_LOWER | DT51_SHORT) 114 115 /* 116 * MMU specific segment values 117 * 118 * We are using following segment layout in m68k pmap_motorola.c: 119 * 68020/030 4KB/page: l1,l2,page == 10,10,12 (%tc = 0x82c0aa00) 120 * 68020/030 8KB/page: l1,l2,page == 8,11,13 (%tc = 0x82d08b00) 121 * 68040/060 4KB/page: l1,l2,l3,page == 7,7,6,12 (%tc = 0x8000) 122 * 68040/060 8KB/page: l1,l2,l3,page == 7,7,5,13 (%tc = 0xc000) 123 * 124 * 68020/030 l2 size is chosen per NPTEPG, a number of page table entries 125 * per page, to use one whole page for PTEs per one segment table entry, 126 * and maybe also because 68020 HP MMU machines use similar structures. 127 * 128 * 68040/060 layout is defined by hardware design and not configurable, 129 * as defined in <m68k/pte_motorola.h>. 130 * 131 * Even on 68040/060, we still appropriate 2-level ste-pte pmap structures 132 * for 68020/030 (derived from 4.4BSD/hp300) to handle 040's 3-level MMU. 133 * TIA_SIZE and TIB_SIZE are used to represent such pmap structures and 134 * they are also referred on 040/060. 135 * 136 * NBSEG and SEGOFSET are used to check l2 STE of the specified VA, 137 * so they have different values between 020/030 and 040/060. 138 */ 139 /* 8KB / 4KB */ 140 #define TIB_SHIFT (PGSHIFT - 2) /* 11 / 10 */ 141 #define TIB_SIZE (1U << TIB_SHIFT) /* 2048 / 1024 */ 142 #define TIA_SHIFT (32 - TIB_SHIFT - PGSHIFT) /* 8 / 10 */ 143 #define TIA_SIZE (1U << TIA_SHIFT) /* 256 / 1024 */ 144 145 #define MMU51_TCR_BITS (TCR51_E | TCR51_SRE | \ 146 __SHIFTIN(PGSHIFT, TCR51_PS) | \ 147 __SHIFTIN(TIA_SHIFT, TCR51_TIA) | \ 148 __SHIFTIN(TIB_SHIFT, TCR51_TIB)) 149 #define MMU40_TCR_BITS (TCR40_E | \ 150 __SHIFTIN(PGSHIFT - 12, TCR40_P)) 151 152 #define SEGSHIFT (TIB_SHIFT + PGSHIFT) /* 24 / 22 */ 153 154 #define NBSEG30 (1U << SEGSHIFT) 155 #define NBSEG40 (1U << SG4_SHIFT2) 156 157 #if ( defined(M68020) || defined(M68030)) && \ 158 (!defined(M68040) && !defined(M68060)) 159 #define NBSEG NBSEG30 160 #elif ( defined(M68040) || defined(M68060)) && \ 161 (!defined(M68020) && !defined(M68030)) 162 #define NBSEG NBSEG40 163 #else 164 #define NBSEG ((mmutype == MMU_68040) ? NBSEG40 : NBSEG30) 165 #endif 166 167 #define SEGOFSET (NBSEG - 1) /* byte offset into segment */ 168 169 #define m68k_round_seg(x) ((((vaddr_t)(x)) + SEGOFSET) & ~SEGOFSET) 170 #define m68k_trunc_seg(x) ((vaddr_t)(x) & ~SEGOFSET) 171 #define m68k_seg_offset(x) ((vaddr_t)(x) & SEGOFSET) 172 173 /* 174 * On the 040, we keep track of which level 2 blocks are already in use 175 * with the pm_stfree mask. Bits are arranged from LSB (block 0) to MSB 176 * (block 31). For convenience, the level 1 table is considered to be 177 * block 0. 178 * 179 * MAX[KU]L2SIZE control how many pages of level 2 descriptors are allowed 180 * for the kernel and users. 181 * 16 or 8 implies only the initial "segment table" page is used, 182 * i.e. it means PAGE_SIZE / (SG4_LEV1SIZE * sizeof(st_entry_t)). 183 * WARNING: don't change MAXUL2SIZE unless you can allocate 184 * physically contiguous pages for the ST in pmap_motorola.c! 185 */ 186 #define MAXKL2SIZE 32 187 #if PAGE_SIZE == 8192 /* NBPG / (SG4_LEV1SIZE * sizeof(st_entry_t)) */ 188 #define MAXUL2SIZE 16 189 #else 190 #define MAXUL2SIZE 8 191 #endif 192 #define l2tobm(n) (1U << (n)) 193 #define bmtol2(n) (ffs(n) - 1) 194 195 /* 196 * For each struct vm_page, there is a list of all currently valid virtual 197 * mappings of that page. An entry is a pv_entry, the list is pv_table. 198 */ 199 struct pv_entry { 200 struct pv_entry *pv_next; /* next pv_entry */ 201 struct pmap *pv_pmap; /* pmap where mapping lies */ 202 vaddr_t pv_va; /* virtual address for mapping */ 203 st_entry_t *pv_ptste; /* non-zero if VA maps a PT page */ 204 struct pmap *pv_ptpmap; /* if pv_ptste, pmap for PT page */ 205 }; 206 207 extern struct pv_header *pv_table; /* array of entries, one per page */ 208 209 #define pmap_resident_count(pmap) ((pmap)->pm_stats.resident_count) 210 #define pmap_wired_count(pmap) ((pmap)->pm_stats.wired_count) 211 212 #define pmap_update(pmap) __nothing /* nothing (yet) */ 213 214 static __inline bool 215 pmap_remove_all(struct pmap *pmap) 216 { 217 /* Nothing. */ 218 return false; 219 } 220 221 extern paddr_t Sysseg_pa; 222 extern st_entry_t *Sysseg; 223 extern pt_entry_t *Sysmap, *Sysptmap; 224 #define SYSMAP_VA VM_MAX_KERNEL_ADDRESS 225 extern vsize_t Sysptsize; 226 extern vsize_t mem_size; 227 extern vaddr_t virtual_avail, virtual_end; 228 extern u_int protection_codes[]; 229 #if defined(M68040) || defined(M68060) 230 extern u_int protostfree; 231 #endif 232 #ifdef CACHE_HAVE_VAC 233 extern u_int pmap_aliasmask; 234 #endif 235 236 extern char *vmmap; /* map for mem, dumps, etc. */ 237 extern void *CADDR1, *CADDR2; 238 extern void *msgbufaddr; 239 240 /* for lwp0 uarea initialization after MMU enabled */ 241 extern vaddr_t lwp0uarea; 242 void pmap_bootstrap_finalize(void); 243 244 vaddr_t pmap_map(vaddr_t, paddr_t, paddr_t, int); 245 void pmap_procwr(struct proc *, vaddr_t, size_t); 246 #define PMAP_NEED_PROCWR 247 248 #ifdef CACHE_HAVE_VAC 249 void pmap_prefer(vaddr_t, vaddr_t *); 250 #define PMAP_PREFER(foff, vap, sz, td) pmap_prefer((foff), (vap)) 251 #endif 252 253 void _pmap_set_page_cacheable(struct pmap *, vaddr_t); 254 void _pmap_set_page_cacheinhibit(struct pmap *, vaddr_t); 255 int _pmap_page_is_cacheable(struct pmap *, vaddr_t); 256 257 paddr_t vtophys(vaddr_t va); 258 259 #endif /* !_M68K_PMAP_MOTOROLA_H_ */ 260
Indexes created Sun Sep 21 16:09:51 GMT 2025