Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/osfmk/ppc/savearea.h
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1 /* 2 * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved. 3 * 4 * @APPLE_LICENSE_HEADER_START@ 5 * 6 * The contents of this file constitute Original Code as defined in and 7 * are subject to the Apple Public Source License Version 1.1 (the 8 * "License"). You may not use this file except in compliance with the 9 * License. Please obtain a copy of the License at 10 * http://www.apple.com/publicsource and read it before using this file. 11 * 12 * This Original Code and all software distributed under the License are 13 * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER 14 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 15 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 16 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the 17 * License for the specific language governing rights and limitations 18 * under the License. 19 * 20 * @APPLE_LICENSE_HEADER_END@ 21 */ 22 #ifdef XNU_KERNEL_PRIVATE 23 24 #ifndef _PPC_SAVEAREA_H_ 25 #define _PPC_SAVEAREA_H_ 26 27 #ifndef ASSEMBLER 28 29 #include <sys/appleapiopts.h> 30 31 #ifdef __APPLE_API_PRIVATE 32 33 #ifdef MACH_KERNEL_PRIVATE 34 #include <stdint.h> 35 #include <mach/vm_types.h> 36 37 #pragma pack(4) /* Make sure the structure stays as we defined it */ 38 typedef struct savearea_comm { 39 40 /* 41 * The following fields are common to all saveareas and are used to manage individual 42 * contexts. 43 * 44 * Fields that start with "save" are part of the individual saveareas. Those that 45 * start with "sac" pertain to the free pool stuff and are valid only on the first slot 46 * in the page. 47 */ 48 49 50 /* Keep the save_prev, sac_next, and sac_prev in these positions, some assembler code depends upon it to 51 * match up with fields in saveanchor. 52 */ 53 /* offset 0x000 */ 54 addr64_t save_prev; /* The address of the previous (or next) savearea */ 55 addr64_t sac_next; /* Points to next savearea page that has a free slot - real */ 56 addr64_t sac_prev; /* Points to previous savearea page that has a free slot - real */ 57 unsigned int save_level; /* Context ID */ 58 unsigned int save_01C; 59 60 /* 0x20 */ 61 unsigned int save_time[2]; /* Context save time - for debugging or performance */ 62 struct thread *save_act; /* Associated thread */ 63 unsigned int save_02c; 64 uint64_t sac_vrswap; /* XOR mask to swap V to R or vice versa */ 65 unsigned int save_flags; /* Various flags */ 66 unsigned int sac_flags; /* Various flags */ 67 68 /* offset 0x040 */ 69 uint64_t save_misc0; /* Various stuff */ 70 uint64_t save_misc1; /* Various stuff - snapshot chain during hibernation */ 71 unsigned int sac_alloc; /* Bitmap of allocated slots */ 72 unsigned int save_054; 73 unsigned int save_misc2; 74 unsigned int save_misc3; 75 76 /* offset 0x0060 */ 77 } savearea_comm; 78 #pragma pack() 79 #endif 80 81 #ifdef BSD_KERNEL_PRIVATE 82 typedef struct savearea_comm { 83 unsigned int save_000[24]; 84 } savearea_comm; 85 #endif 86 87 #if defined(MACH_KERNEL_PRIVATE) || defined(BSD_KERNEL_PRIVATE) 88 /* 89 * This type of savearea contains all of the general context. 90 */ 91 92 #pragma pack(4) /* Make sure the structure stays as we defined it */ 93 typedef struct savearea { 94 95 savearea_comm save_hdr; /* Stuff common to all saveareas */ 96 97 uint64_t save_xdat0; /* Exception data 0 */ 98 uint64_t save_xdat1; /* Exception data 1 */ 99 uint64_t save_xdat2; /* Exception data 2 */ 100 uint64_t save_xdat3; /* Exception data 3 */ 101 /* offset 0x0080 */ 102 uint64_t save_r0; 103 uint64_t save_r1; 104 uint64_t save_r2; 105 uint64_t save_r3; 106 /* offset 0x0A0 */ 107 uint64_t save_r4; 108 uint64_t save_r5; 109 uint64_t save_r6; 110 uint64_t save_r7; 111 /* offset 0x0C0 */ 112 uint64_t save_r8; 113 uint64_t save_r9; 114 uint64_t save_r10; 115 uint64_t save_r11; 116 /* offset 0x0E0 */ 117 uint64_t save_r12; 118 uint64_t save_r13; 119 uint64_t save_r14; 120 uint64_t save_r15; 121 /* offset 0x100 */ 122 uint64_t save_r16; 123 uint64_t save_r17; 124 uint64_t save_r18; 125 uint64_t save_r19; 126 /* offset 0x120 */ 127 uint64_t save_r20; 128 uint64_t save_r21; 129 uint64_t save_r22; 130 uint64_t save_r23; 131 /* offset 0x140 */ 132 uint64_t save_r24; 133 uint64_t save_r25; 134 uint64_t save_r26; 135 uint64_t save_r27; 136 /* offset 0x160 */ 137 uint64_t save_r28; 138 uint64_t save_r29; 139 uint64_t save_r30; 140 uint64_t save_r31; 141 /* offset 0x180 */ 142 uint64_t save_srr0; 143 uint64_t save_srr1; 144 uint64_t save_xer; 145 uint64_t save_lr; 146 /* offset 0x1A0 */ 147 uint64_t save_ctr; 148 uint64_t save_dar; 149 unsigned int save_cr; 150 unsigned int save_dsisr; 151 unsigned int save_exception; 152 unsigned int save_vrsave; 153 /* offset 0x1C0 */ 154 unsigned int save_vscr[4]; 155 unsigned int save_fpscrpad; 156 unsigned int save_fpscr; 157 unsigned int save_1d8[2]; 158 /* offset 0x1E0 */ 159 unsigned int save_1E0[8]; 160 /* offset 0x200 - keep on 128 byte bndry */ 161 uint32_t save_pmc[8]; 162 uint64_t save_mmcr0; /* offset 0x220 */ 163 uint64_t save_mmcr1; 164 uint64_t save_mmcr2; 165 166 unsigned int save_238[2]; 167 /* offset 0x240 */ 168 unsigned int save_instr[16]; /* Instrumentation */ 169 /* offset 0x280 */ 170 } savearea; 171 #pragma pack() 172 173 174 /* 175 * This type of savearea contains all of the floating point context. 176 */ 177 178 #pragma pack(4) /* Make sure the structure stays as we defined it */ 179 typedef struct savearea_fpu { 180 181 savearea_comm save_hdr; /* Stuff common to all saveareas */ 182 183 unsigned int save_060[8]; /* Fill 32 bytes */ 184 /* offset 0x0080 */ 185 double save_fp0; 186 double save_fp1; 187 double save_fp2; 188 double save_fp3; 189 190 double save_fp4; 191 double save_fp5; 192 double save_fp6; 193 double save_fp7; 194 195 double save_fp8; 196 double save_fp9; 197 double save_fp10; 198 double save_fp11; 199 200 double save_fp12; 201 double save_fp13; 202 double save_fp14; 203 double save_fp15; 204 205 double save_fp16; 206 double save_fp17; 207 double save_fp18; 208 double save_fp19; 209 210 double save_fp20; 211 double save_fp21; 212 double save_fp22; 213 double save_fp23; 214 215 double save_fp24; 216 double save_fp25; 217 double save_fp26; 218 double save_fp27; 219 220 double save_fp28; 221 double save_fp29; 222 double save_fp30; 223 double save_fp31; 224 /* offset 0x180 */ 225 unsigned int save_180[8]; 226 unsigned int save_1A0[8]; 227 unsigned int save_1C0[8]; 228 unsigned int save_1E0[8]; 229 unsigned int save_200[8]; 230 unsigned int save_220[8]; 231 unsigned int save_240[8]; 232 unsigned int save_260[8]; 233 234 /* offset 0x280 */ 235 } savearea_fpu; 236 #pragma pack() 237 238 239 240 /* 241 * This type of savearea contains all of the vector context. 242 */ 243 244 #pragma pack(4) /* Make sure the structure stays as we defined it */ 245 typedef struct savearea_vec { 246 247 savearea_comm save_hdr; /* Stuff common to all saveareas */ 248 249 unsigned int save_060[7]; /* Fill 32 bytes */ 250 unsigned int save_vrvalid; /* Valid registers in saved context */ 251 252 /* offset 0x0080 */ 253 unsigned int save_vr0[4]; 254 unsigned int save_vr1[4]; 255 unsigned int save_vr2[4]; 256 unsigned int save_vr3[4]; 257 unsigned int save_vr4[4]; 258 unsigned int save_vr5[4]; 259 unsigned int save_vr6[4]; 260 unsigned int save_vr7[4]; 261 unsigned int save_vr8[4]; 262 unsigned int save_vr9[4]; 263 unsigned int save_vr10[4]; 264 unsigned int save_vr11[4]; 265 unsigned int save_vr12[4]; 266 unsigned int save_vr13[4]; 267 unsigned int save_vr14[4]; 268 unsigned int save_vr15[4]; 269 unsigned int save_vr16[4]; 270 unsigned int save_vr17[4]; 271 unsigned int save_vr18[4]; 272 unsigned int save_vr19[4]; 273 unsigned int save_vr20[4]; 274 unsigned int save_vr21[4]; 275 unsigned int save_vr22[4]; 276 unsigned int save_vr23[4]; 277 unsigned int save_vr24[4]; 278 unsigned int save_vr25[4]; 279 unsigned int save_vr26[4]; 280 unsigned int save_vr27[4]; 281 unsigned int save_vr28[4]; 282 unsigned int save_vr29[4]; 283 unsigned int save_vr30[4]; 284 unsigned int save_vr31[4]; 285 286 /* offset 0x280 */ 287 } savearea_vec; 288 #pragma pack() 289 #endif /* MACH_KERNEL_PRIVATE || BSD_KERNEL_PRIVATE */ 290 291 #ifdef MACH_KERNEL_PRIVATE 292 293 #pragma pack(4) /* Make sure the structure stays as we defined it */ 294 struct Saveanchor { 295 296 /* 297 * Note that this force aligned in aligned_data.s and must be in V=R storage. 298 * Also, all addresses in chains are physical. This structure can only be 299 * updated with translation and interrupts disabled. This is because it is 300 * locked during exception processing and if we were to take a PTE miss while the 301 * lock were held, well, that would be very bad now wouldn't it? 302 * Note that the first 24 bytes must be the same format as a savearea header. 303 */ 304 305 unsigned int savelock; /* 000 Lock word for savearea free list manipulation */ 306 int saveRSVD4; /* 004 reserved */ 307 addr64_t savepoolfwd; /* 008 Forward anchor for the free pool */ 308 addr64_t savepoolbwd; /* 010 Backward anchor for the free pool */ 309 volatile addr64_t savefree; /* 018 Anchor for the global free list */ 310 volatile unsigned int savefreecnt; /* 020 Number of saveareas on global free list */ 311 volatile int saveadjust; /* 024 If 0 number of saveareas is ok, otherwise # to change (pos means grow, neg means shrink */ 312 volatile int saveinuse; /* 028 Number of areas in use counting those on the local free list */ 313 unsigned int savetarget; /* 02C Number of saveareas needed */ 314 int savemaxcount; /* 030 Maximum saveareas ever allocated */ 315 unsigned int saveinusesnapshot; /* 034 snapshot inuse count */ 316 volatile addr64_t savefreesnapshot; /* 038 snapshot global free list header */ 317 /* 040 */ 318 }; 319 #pragma pack() 320 321 extern struct Saveanchor saveanchor; /* Aliged savearea anchor */ 322 323 #define sac_cnt (4096 / sizeof(savearea)) /* Number of saveareas per page */ 324 #define sac_empty (0xFFFFFFFF << (32 - sac_cnt)) /* Mask with all entries empty */ 325 #define sac_perm 0x40000000 /* Page permanently assigned */ 326 #define sac_permb 1 /* Page permanently assigned - bit position */ 327 328 #define LocalSaveTarget (((8 + sac_cnt - 1) / sac_cnt) * sac_cnt) /* Target for size of local savearea free list */ 329 #define LocalSaveMin (LocalSaveTarget / 2) /* Min size of local savearea free list before we grow */ 330 #define LocalSaveMax (LocalSaveTarget * 2) /* Max size of local savearea free list before we trim */ 331 332 #define FreeListMin (2 * LocalSaveTarget) /* Always make sure there are enough to fill local list twice per processor */ 333 #define SaveLowHysteresis LocalSaveTarget /* The number off from target before we adjust upwards */ 334 #define SaveHighHysteresis (2 * FreeListMin) /* The number off from target before we adjust downwards */ 335 #define InitialSaveAreas (2 * FreeListMin) /* The number of saveareas to make at boot time */ 336 #define InitialSaveTarget FreeListMin /* The number of saveareas for an initial target. This should be the minimum ever needed. */ 337 #define InitialSaveBloks (InitialSaveAreas + sac_cnt - 1) / sac_cnt /* The number of savearea blocks to allocate at boot */ 338 #define BackPocketSaveBloks 8 /* Number of pages of back pocket saveareas */ 339 340 void save_queue(ppnum_t); /* Add a new savearea block to the free list */ 341 addr64_t save_get_init(void); /* special savearea-get for cpu initialization (returns physical address) */ 342 struct savearea *save_get(void); /* Obtains a savearea from the free list (returns virtual address) */ 343 reg64_t save_get_phys_32(void); /* Obtains a savearea from the free list (returns phys addr in r3) */ 344 reg64_t save_get_phys_64(void); /* Obtains a savearea from the free list (returns phys addr in r3) */ 345 struct savearea *save_alloc(void); /* Obtains a savearea and allocates blocks if needed */ 346 struct savearea *save_cpv(addr64_t); /* Converts a physical savearea address to virtual */ 347 void save_ret(struct savearea *); /* Returns a savearea to the free list by virtual address */ 348 void save_ret_wMSR(struct savearea *, reg64_t); /* returns a savearea and restores an MSR */ 349 void save_ret_phys(reg64_t); /* Returns a savearea to the free list by physical address */ 350 void save_adjust(void); /* Adjust size of the global free list */ 351 struct savearea_comm *save_trim_free(void); /* Remove free pages from savearea pool */ 352 int save_recover(void); /* returns nonzero if we can recover enough from the free pool */ 353 void savearea_init(vm_offset_t addr); /* Boot-time savearea initialization */ 354 355 void save_fake_zone_info( /* report savearea usage statistics as fake zone info */ 356 int *count, 357 vm_size_t *cur_size, 358 vm_size_t *max_size, 359 vm_size_t *elem_size, 360 vm_size_t *alloc_size, 361 int *collectable, 362 int *exhaustable); 363 364 void save_snapshot(void); 365 void save_snapshot_restore(void); 366 367 #endif /* MACH_KERNEL_PRIVATE */ 368 #endif /* __APPLE_API_PRIVATE */ 369 370 #endif /* ndef ASSEMBLER */ 371 372 #define SAVattach 0x80000000 /* Savearea has valid context */ 373 #define SAVrststk 0x00010000 /* Indicates that the current stack should be reset to empty */ 374 #define SAVsyscall 0x00020000 /* Indicates that the savearea is associated with a syscall */ 375 #define SAVredrive 0x00040000 /* Indicates that the low-level fault handler associated */ 376 #define SAVredriveb 13 /* Indicates that the low-level fault handler associated */ 377 #define SAVinstrument 0x00080000 /* Indicates that we should return instrumentation data */ 378 #define SAVinstrumentb 12 /* Indicates that we should return instrumentation data */ 379 #define SAVeat 0x00100000 /* Indicates that interruption should be ignored */ 380 #define SAVeatb 11 /* Indicates that interruption should be ignored */ 381 #define SAVtype 0x0000FF00 /* Shows type of savearea */ 382 #define SAVtypeshft 8 /* Shift to position type */ 383 #define SAVempty 0x86 /* Savearea is on free list */ 384 #define SAVgeneral 0x01 /* Savearea contains general context */ 385 #define SAVfloat 0x02 /* Savearea contains floating point context */ 386 #define SAVvector 0x03 /* Savearea contains vector context */ 387 388 389 390 #endif /* _PPC_SAVEAREA_H_ */ 391 392 #endif /* XNU_KERNEL_PRIVATE */
Cache object: 7ddd66da1d54566dada142e1c254fc46
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