pte.h revision 1.18.50.1
1 /* $NetBSD: pte.h,v 1.18.50.1 2008/03/24 07:15:05 keiichi Exp $ */ 2 3 /* 4 * Copyright (c) 1996-1999 Eduardo Horvath 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 12 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND 13 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 14 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 15 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE 16 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 17 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 18 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 19 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 20 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 21 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 22 * SUCH DAMAGE. 23 * 24 */ 25 26 #ifndef _MACHINE_PTE_H_ 27 #define _MACHINE_PTE_H_ 28 29 #if defined(_KERNEL_OPT) 30 #include "opt_sparc_arch.h" 31 #endif 32 33 /* 34 * Address translation works as follows: 35 * 36 ** 37 * For sun4u: 38 * 39 * Take your pick; it's all S/W anyway. We'll start by emulating a sun4. 40 * Oh, here's the sun4u TTE for reference: 41 * 42 * struct sun4u_tte { 43 * uint64 tag_g:1, (global flag) 44 * tag_ctxt:15, (context for mapping) 45 * tag_unassigned:6, 46 * tag_va:42; (virtual address bits<64:22>) 47 * uint64 data_v:1, (valid bit) 48 * data_size:2, (page size [8K*8**<SIZE>]) 49 * data_nfo:1, (no-fault only) 50 * data_ie:1, (invert endianness [inefficient]) 51 * data_soft2:2, (reserved for S/W) 52 * data_pa:36, (physical address) 53 * data_soft:6, (reserved for S/W) 54 * data_lock:1, (lock into TLB) 55 * data_cacheable:2, (cacheability control) 56 * data_e:1, (explicit accesses only) 57 * data_priv:1, (privileged page) 58 * data_w:1, (writable) 59 * data_g:1; (same as tag_g) 60 * }; 61 */ 62 63 /* virtual address to virtual page number */ 64 #define VA_SUN4_VPG(va) (((int)(va) >> 13) & 31) 65 #define VA_SUN4C_VPG(va) (((int)(va) >> 12) & 63) 66 #define VA_SUN4U_VPG(va) (((int)(va) >> 13) & 31) 67 68 /* virtual address to offset within page */ 69 #define VA_SUN4_OFF(va) (((int)(va)) & 0x1FFF) 70 #define VA_SUN4C_OFF(va) (((int)(va)) & 0xFFF) 71 #define VA_SUN4U_OFF(va) (((int)(va)) & 0x1FFF) 72 73 /* When we go to 64-bit VAs we need to handle the hole */ 74 #define VA_VPG(va) VA_SUN4U_VPG(va) 75 #define VA_OFF(va) VA_SUN4U_OFF(va) 76 77 #define PG_SHIFT4U 13 78 #define MMU_PAGE_ALIGN 8192 79 80 /* If you know where a tte is in the tsb, how do you find its va? */ 81 #define TSBVA(i) ((tsb[(i)].tag.f.tag_va<<22)|(((i)<<13)&0x3ff000)) 82 83 #ifndef _LOCORE 84 /* 85 * This is the spitfire TTE. 86 * 87 * We could use bitmasks and shifts to construct this if 88 * we had a 64-bit compiler w/64-bit longs. Otherwise it's 89 * a real pain to do this in C. 90 */ 91 #if 0 92 /* We don't use bitfeilds anyway. */ 93 struct sun4u_tag_fields { 94 uint64_t tag_g:1, /* global flag */ 95 tag_ctxt:15, /* context for mapping */ 96 tag_unassigned:6, 97 tag_va:42; /* virtual address bits<64:22> */ 98 }; 99 union sun4u_tag { struct sun4u_tag_fields f; int64_t tag; }; 100 struct sun4u_data_fields { 101 uint64_t data_v:1, /* valid bit */ 102 data_size:2, /* page size [8K*8**<SIZE>] */ 103 data_nfo:1, /* no-fault only */ 104 data_ie:1, /* invert endianness [inefficient] */ 105 data_soft2:2, /* reserved for S/W */ 106 data_pa:36, /* physical address */ 107 data_accessed:1,/* S/W accessed bit */ 108 data_modified:1,/* S/W modified bit */ 109 data_realw:1, /* S/W real writable bit (to manage modified) */ 110 data_tsblock:1, /* S/W TSB locked entry */ 111 data_exec:1, /* S/W Executable */ 112 data_onlyexec:1,/* S/W Executable only */ 113 data_lock:1, /* lock into TLB */ 114 data_cacheable:2, /* cacheability control */ 115 data_e:1, /* explicit accesses only */ 116 data_priv:1, /* privileged page */ 117 data_w:1, /* writable */ 118 data_g:1; /* same as tag_g */ 119 }; 120 union sun4u_data { struct sun4u_data_fields f; int64_t data; }; 121 struct sun4u_tte { 122 union sun4u_tag tag; 123 union sun4u_data data; 124 }; 125 #else 126 struct sun4u_tte { 127 int64_t tag; 128 int64_t data; 129 }; 130 #endif 131 typedef struct sun4u_tte pte_t; 132 133 #endif /* _LOCORE */ 134 135 /* TSB tag masks */ 136 #define CTX_MASK ((1<<13)-1) 137 #define TSB_TAG_CTX_SHIFT 48 138 #define TSB_TAG_VA_SHIFT 22 139 #define TSB_TAG_G 0x8000000000000000LL 140 141 #define TSB_TAG_CTX(t) ((((int64_t)(t))>>TSB_TAG_CTX_SHIFT)&CTX_MASK) 142 #define TSB_TAG_VA(t) ((((int64_t)(t))<<TSB_TAG_VA_SHIFT)) 143 #define TSB_TAG(g,ctx,va) ((((uint64_t)((g)!=0))<<63)|(((uint64_t)(ctx)&CTX_MASK)<<TSB_TAG_CTX_SHIFT)|(((uint64_t)va)>>TSB_TAG_VA_SHIFT)) 144 145 /* Page sizes */ 146 #define PGSZ_8K 0 147 #define PGSZ_64K 1 148 #define PGSZ_512K 2 149 #define PGSZ_4M 3 150 151 #define PGSZ_SHIFT 61 152 #define TLB_SZ(s) (((uint64_t)(s))<<PGSZ_SHIFT) 153 154 /* TLB data masks */ 155 #define TLB_V 0x8000000000000000LL 156 #define TLB_8K TLB_SZ(PGSZ_8K) 157 #define TLB_64K TLB_SZ(PGSZ_64K) 158 #define TLB_512K TLB_SZ(PGSZ_512K) 159 #define TLB_4M TLB_SZ(PGSZ_4M) 160 #define TLB_SZ_MASK 0x6000000000000000LL 161 #define TLB_NFO 0x1000000000000000LL 162 #define TLB_IE 0x0800000000000000LL 163 #define TLB_SOFT2_MASK 0x07fe000000000000LL 164 #define TLB_DIAG_MASK 0x0001fe0000000000LL 165 #define TLB_PA_MASK 0x000001ffffffe000LL 166 #define TLB_SOFT_MASK 0x0000000000001f80LL 167 /* S/W bits */ 168 /* Access & TSB locked bits are swapped so I can set access w/one insn */ 169 /* #define TLB_ACCESS 0x0000000000001000LL */ 170 #define TLB_ACCESS 0x0000000000000200LL 171 #define TLB_MODIFY 0x0000000000000800LL 172 #define TLB_REAL_W 0x0000000000000400LL 173 /* #define TLB_TSB_LOCK 0x0000000000000200LL */ 174 #define TLB_TSB_LOCK 0x0000000000001000LL 175 #define TLB_EXEC 0x0000000000000100LL 176 #define TLB_EXEC_ONLY 0x0000000000000080LL 177 /* H/W bits */ 178 #define TLB_L 0x0000000000000040LL 179 #define TLB_CACHE_MASK 0x0000000000000030LL 180 #define TLB_CP 0x0000000000000020LL 181 #define TLB_CV 0x0000000000000010LL 182 #define TLB_E 0x0000000000000008LL 183 #define TLB_P 0x0000000000000004LL 184 #define TLB_W 0x0000000000000002LL 185 #define TLB_G 0x0000000000000001LL 186 187 /* Use a bit in the SOFT2 area to indicate a locked mapping. */ 188 #define TLB_WIRED 0x0010000000000000LL 189 190 /* 191 * The following bits are used by locore so they should 192 * be duplicates of the above w/o the "long long" 193 */ 194 /* S/W bits */ 195 /* #define TTE_ACCESS 0x0000000000001000 */ 196 #define TTE_ACCESS 0x0000000000000200 197 #define TTE_MODIFY 0x0000000000000800 198 #define TTE_REAL_W 0x0000000000000400 199 /* #define TTE_TSB_LOCK 0x0000000000000200 */ 200 #define TTE_TSB_LOCK 0x0000000000001000 201 #define TTE_EXEC 0x0000000000000100 202 #define TTE_EXEC_ONLY 0x0000000000000080 203 /* H/W bits */ 204 #define TTE_L 0x0000000000000040 205 #define TTE_CACHE_MASK 0x0000000000000030 206 #define TTE_CP 0x0000000000000020 207 #define TTE_CV 0x0000000000000010 208 #define TTE_E 0x0000000000000008 209 #define TTE_P 0x0000000000000004 210 #define TTE_W 0x0000000000000002 211 #define TTE_G 0x0000000000000001 212 213 #define TTE_DATA_BITS "\177\20" \ 214 "b\77V\0" "f\75\2SIZE\0" "b\77V\0" "f\75\2SIZE\0" \ 215 "=\0008K\0" "=\00164K\0" "=\002512K\0" "=\0034M\0" \ 216 "b\74NFO\0" "b\73IE\0" "f\62\10SOFT2\0" \ 217 "f\51\10DIAG\0" "f\15\33PA<40:13>\0" "f\7\5SOFT\0" \ 218 "b\6L\0" "b\5CP\0" "b\4CV\0" \ 219 "b\3E\0" "b\2P\0" "b\1W\0" "b\0G\0" 220 221 #define TSB_DATA(g,sz,pa,priv,write,cache,aliased,valid,ie) \ 222 (((valid)?TLB_V:0LL)|TLB_SZ(sz)|(((uint64_t)(pa))&TLB_PA_MASK)|\ 223 ((cache)?((aliased)?TLB_CP:TLB_CACHE_MASK):TLB_E)|\ 224 ((priv)?TLB_P:0LL)|((write)?TLB_W:0LL)|((g)?TLB_G:0LL)|((ie)?TLB_IE:0LL)) 225 226 #define MMU_CACHE_VIRT 0x3 227 #define MMU_CACHE_PHYS 0x2 228 #define MMU_CACHE_NONE 0x0 229 230 /* This needs to be updated for sun4u IOMMUs */ 231 /* 232 * IOMMU PTE bits. 233 */ 234 #define IOPTE_PPN_MASK 0x07ffff00 235 #define IOPTE_PPN_SHIFT 8 236 #define IOPTE_RSVD 0x000000f1 237 #define IOPTE_WRITE 0x00000004 238 #define IOPTE_VALID 0x00000002 239 240 /* 241 * This is purely for compatibility with the old SPARC machines. 242 */ 243 #define NBPRG (1 << 24) /* bytes per region */ 244 #define RGSHIFT 24 /* log2(NBPRG) */ 245 #define NSEGRG (NBPRG / NBPSG) /* segments per region */ 246 247 #define NBPSG (1 << 18) /* bytes per segment */ 248 #define SGSHIFT 18 /* log2(NBPSG) */ 249 250 /* there is no `struct pte'; we just use `int'; this is for non-4M only */ 251 #define PG_V 0x80000000 252 #define PG_PFNUM 0x0007ffff /* n.b.: only 16 bits on sun4c */ 253 254 /* virtual address to virtual region number */ 255 #define VA_VREG(va) (((unsigned int)(va) >> RGSHIFT) & 255) 256 257 /* virtual address to virtual segment number */ 258 #define VA_VSEG(va) (((unsigned int)(va) >> SGSHIFT) & 63) 259 260 #ifndef _LOCORE 261 typedef u_short pmeg_t; /* 10 bits needed per Sun-4 segmap entry */ 262 #endif 263 264 /* 265 * Here are the bit definitions for 4M/SRMMU pte's 266 */ 267 /* MMU TABLE ENTRIES */ 268 #define SRMMU_TETYPE 0x3 /* mask for table entry type */ 269 #define SRMMU_TEPTE 0x2 /* Page Table Entry */ 270 /* PTE FIELDS */ 271 #define SRMMU_PPNMASK 0xFFFFFF00 272 #define SRMMU_PPNPASHIFT 0x4 /* shift to put ppn into PAddr */ 273 274 #endif /* _MACHINE_PTE_H_ */ 275
Indexes created Mon Oct 20 16:09:52 GMT 2025