pmap_motorola.h revision 1.26
1 /* $NetBSD: pmap_motorola.h,v 1.26 2009/12/11 17:53:22 tsutsui 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 #include <sys/simplelock.h> 80 #include <machine/cpu.h> 81 #include <machine/pte.h> 82 83 /* 84 * Pmap stuff 85 */ 86 struct pmap { 87 pt_entry_t *pm_ptab; /* KVA of page table */ 88 st_entry_t *pm_stab; /* KVA of segment table */ 89 u_int pm_stfree; /* 040: free lev2 blocks */ 90 st_entry_t *pm_stpa; /* 040: ST phys addr */ 91 uint16_t pm_sref; /* segment table ref count */ 92 uint16_t pm_count; /* pmap reference count */ 93 struct simplelock pm_lock; /* lock on pmap */ 94 struct pmap_statistics pm_stats; /* pmap statistics */ 95 int pm_ptpages; /* more stats: PT pages */ 96 }; 97 98 /* 99 * MMU specific segment values 100 * 101 * We are using following segment layout in m68k pmap_motorola.c: 102 * 68020/030 4KB/page: l1,l2,page == 10,10,12 (%tc = 0x82c0aa00) 103 * 68020/030 8KB/page: l1,l2,page == 8,11,13 (%tc = 0x82d08b00) 104 * 68040/060 4KB/page: l1,l2,l3,page == 7,7,6,12 105 * 68040/060 8KB/page: l1,l2,l3,page == 7,7,5,13 106 * 107 * 68020/030 l2 size is chosen per NPTEPG, a number of page table entries 108 * per page, to use one whole page for PTEs per one segment table entry, 109 * and maybe also because 68020 HP MMU machines use simlar structures. 110 * 111 * 68040/060 layout is defined by hardware design and not configurable, 112 * as defined in <m68k/pte_motorola.h>. 113 * 114 * Even on 68040/060, we still appropriate 2-level ste-pte pmap structures 115 * for 68020/030 (derived from 4.4BSD/hp300) to handle 040's 3-level MMU. 116 * TIA_SIZE and TIB_SIZE are used to represent such pmap structures and 117 * they are also refered on 040/060. 118 * 119 * NBSEG and SEGOFSET are used to check l2 STE of the specified VA, 120 * so they have different values between 020/030 and 040/060. 121 */ 122 /* 8KB / 4KB */ 123 #define TIB_SHIFT (PG_SHIFT - 2) /* 11 / 10 */ 124 #define TIB_SIZE (1U << TIB_SHIFT) /* 2048 / 1024 */ 125 #define TIA_SHIFT (32 - TIB_SHIFT - PG_SHIFT) /* 8 / 10 */ 126 #define TIA_SIZE (1U << TIA_SHIFT) /* 256 / 1024 */ 127 128 #define SEGSHIFT (TIB_SHIFT + PG_SHIFT) /* 24 / 22 */ 129 130 #define NBSEG30 (1U << SEGSHIFT) 131 #define NBSEG40 (1U << SG4_SHIFT2) 132 133 #if ( defined(M68020) || defined(M68030)) && \ 134 (!defined(M68040) && !defined(M68060)) 135 #define NBSEG NBSEG30 136 #elif ( defined(M68040) || defined(M68060)) && \ 137 (!defined(M68020) && !defined(M68030)) 138 #define NBSEG NBSEG40 139 #else 140 #define NBSEG ((mmutype == MMU_68040) ? NBSEG40 : NBSEG30) 141 #endif 142 143 #define SEGOFSET (NBSEG - 1) /* byte offset into segment */ 144 145 #define m68k_round_seg(x) ((((vaddr_t)(x)) + SEGOFSET) & ~SEGOFSET) 146 #define m68k_trunc_seg(x) ((vaddr_t)(x) & ~SEGOFSET) 147 #define m68k_seg_offset(x) ((vaddr_t)(x) & SEGOFSET) 148 149 /* 150 * On the 040, we keep track of which level 2 blocks are already in use 151 * with the pm_stfree mask. Bits are arranged from LSB (block 0) to MSB 152 * (block 31). For convenience, the level 1 table is considered to be 153 * block 0. 154 * 155 * MAX[KU]L2SIZE control how many pages of level 2 descriptors are allowed. 156 * for the kernel and users. 8 implies only the initial "segment table" 157 * page is used. WARNING: don't change MAXUL2SIZE unless you can allocate 158 * physically contiguous pages for the ST in pmap.c! 159 */ 160 #define MAXKL2SIZE 32 161 #if PAGE_SIZE == 8192 162 #define MAXUL2SIZE 16 163 #else 164 #define MAXUL2SIZE 8 165 #endif 166 #define l2tobm(n) (1 << (n)) 167 #define bmtol2(n) (ffs(n) - 1) 168 169 /* 170 * Macros for speed 171 */ 172 #define PMAP_ACTIVATE(pmap, loadhw) \ 173 { \ 174 if ((loadhw)) \ 175 loadustp(m68k_btop((paddr_t)(pmap)->pm_stpa)); \ 176 } 177 178 /* 179 * For each struct vm_page, there is a list of all currently valid virtual 180 * mappings of that page. An entry is a pv_entry, the list is pv_table. 181 */ 182 struct pv_entry { 183 struct pv_entry *pv_next; /* next pv_entry */ 184 struct pmap *pv_pmap; /* pmap where mapping lies */ 185 vaddr_t pv_va; /* virtual address for mapping */ 186 st_entry_t *pv_ptste; /* non-zero if VA maps a PT page */ 187 struct pmap *pv_ptpmap; /* if pv_ptste, pmap for PT page */ 188 }; 189 190 struct pv_page; 191 192 struct pv_page_info { 193 TAILQ_ENTRY(pv_page) pgi_list; 194 struct pv_entry *pgi_freelist; 195 int pgi_nfree; 196 }; 197 198 /* 199 * This is basically: 200 * ((PAGE_SIZE - sizeof(struct pv_page_info)) / sizeof(struct pv_entry)) 201 */ 202 #if PAGE_SIZE == 8192 203 #define NPVPPG 340 204 #else 205 #define NPVPPG 170 206 #endif 207 208 struct pv_page { 209 struct pv_page_info pvp_pgi; 210 struct pv_entry pvp_pv[NPVPPG]; 211 }; 212 213 #define active_pmap(pm) \ 214 ((pm) == pmap_kernel() || (pm) == curproc->p_vmspace->vm_map.pmap) 215 #define active_user_pmap(pm) \ 216 (curproc && \ 217 (pm) != pmap_kernel() && (pm) == curproc->p_vmspace->vm_map.pmap) 218 219 extern struct pv_header *pv_table; /* array of entries, one per page */ 220 221 #define pmap_resident_count(pmap) ((pmap)->pm_stats.resident_count) 222 #define pmap_wired_count(pmap) ((pmap)->pm_stats.wired_count) 223 224 #define pmap_update(pmap) /* nothing (yet) */ 225 226 static __inline void 227 pmap_remove_all(struct pmap *pmap) 228 { 229 /* Nothing. */ 230 } 231 232 extern paddr_t Sysseg_pa; 233 extern st_entry_t *Sysseg; 234 extern pt_entry_t *Sysmap, *Sysptmap; 235 extern vsize_t Sysptsize; 236 extern vsize_t mem_size; 237 extern vaddr_t virtual_avail, virtual_end; 238 extern u_int protection_codes[]; 239 #if defined(M68040) || defined(M68060) 240 extern u_int protostfree; 241 #endif 242 243 extern char *vmmap; /* map for mem, dumps, etc. */ 244 extern void *CADDR1, *CADDR2; 245 extern void *msgbufaddr; 246 247 /* for lwp0 uarea initialization after MMU enabled */ 248 extern vaddr_t lwp0uarea; 249 void pmap_bootstrap_finalize(void); 250 251 vaddr_t pmap_map(vaddr_t, paddr_t, paddr_t, int); 252 void pmap_procwr(struct proc *, vaddr_t, size_t); 253 #define PMAP_NEED_PROCWR 254 255 #ifdef CACHE_HAVE_VAC 256 void pmap_prefer(vaddr_t, vaddr_t *); 257 #define PMAP_PREFER(foff, vap, sz, td) pmap_prefer((foff), (vap)) 258 #endif 259 260 void _pmap_set_page_cacheable(struct pmap *, vaddr_t); 261 void _pmap_set_page_cacheinhibit(struct pmap *, vaddr_t); 262 int _pmap_page_is_cacheable(struct pmap *, vaddr_t); 263 264 #endif /* !_M68K_PMAP_MOTOROLA_H_ */ 265
Indexes created Wed Sep 24 15:09:51 GMT 2025