1/* 2 * Copyright (c) 2002-2005 The Regents of The University of Michigan 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer; --- 39 unchanged lines hidden (view full) --- 48#include "sim/core.hh" 49 50class Request; 51 52typedef Request* RequestPtr; 53 54class Request : public FastAlloc 55{ |
56 public: 57 typedef uint32_t FlagsType; 58 typedef ::Flags<FlagsType> Flags; 59 60 /** ASI information for this request if it exists. */ 61 static const FlagsType ASI_BITS = 0x000000FF; 62 /** The request is a Load locked/store conditional. */ 63 static const FlagsType LLSC = 0x00000100; --- 27 unchanged lines hidden (view full) --- 91 /** This request is for a memory swap. */ 92 static const FlagsType MEM_SWAP = 0x00100000; 93 static const FlagsType MEM_SWAP_COND = 0x00200000; 94 /** The request should ignore unaligned access faults */ 95 static const FlagsType NO_HALF_WORD_ALIGN_FAULT = 0x00400000; 96 /** This request is to a memory mapped register. */ 97 static const FlagsType MMAPED_IPR = 0x00800000; 98 |
99 /** These flags are *not* cleared when a Request object is reused 100 (assigned a new address). */ 101 static const FlagsType STICKY_FLAGS = INST_READ; 102 |
103 private: |
104 typedef uint8_t PrivateFlagsType; 105 typedef ::Flags<PrivateFlagsType> PrivateFlags; |
106 107 /** Whether or not the size is valid. */ |
108 static const PrivateFlagsType VALID_SIZE = 0x00000001; |
109 /** Whether or not paddr is valid (has been written yet). */ |
110 static const PrivateFlagsType VALID_PADDR = 0x00000002; |
111 /** Whether or not the vaddr & asid are valid. */ |
112 static const PrivateFlagsType VALID_VADDR = 0x00000004; |
113 /** Whether or not the pc is valid. */ |
114 static const PrivateFlagsType VALID_PC = 0x00000010; |
115 /** Whether or not the context ID is valid. */ |
116 static const PrivateFlagsType VALID_CONTEXT_ID = 0x00000020; 117 static const PrivateFlagsType VALID_THREAD_ID = 0x00000040; |
118 /** Whether or not the sc result is valid. */ |
119 static const PrivateFlagsType VALID_EXTRA_DATA = 0x00000080; |
120 |
121 /** These flags are *not* cleared when a Request object is reused 122 (assigned a new address). */ 123 static const PrivateFlagsType STICKY_PRIVATE_FLAGS = 124 VALID_CONTEXT_ID | VALID_THREAD_ID; 125 |
126 private: 127 /** 128 * The physical address of the request. Valid only if validPaddr 129 * is set. 130 */ 131 Addr paddr; 132 133 /** 134 * The size of the request. This field must be set when vaddr or 135 * paddr is written via setVirt() or setPhys(), so it is always 136 * valid as long as one of the address fields is valid. 137 */ 138 int size; 139 140 /** Flag structure for the request. */ 141 Flags flags; 142 |
143 /** Private flags for field validity checking. */ 144 PrivateFlags privateFlags; 145 |
146 /** 147 * The time this request was started. Used to calculate 148 * latencies. This field is set to curTick any time paddr or vaddr 149 * is written. 150 */ 151 Tick time; 152 153 /** The address space ID. */ --- 28 unchanged lines hidden (view full) --- 182 Request(Addr paddr, int size, Flags flags) 183 { 184 setPhys(paddr, size, flags); 185 } 186 187 Request(int asid, Addr vaddr, int size, Flags flags, Addr pc, 188 int cid, int tid) 189 { |
190 setVirt(asid, vaddr, size, flags, pc); |
191 setThreadContext(cid, tid); |
192 } 193 194 ~Request() {} // for FastAlloc 195 196 /** 197 * Set up CPU and thread numbers. 198 */ 199 void 200 setThreadContext(int context_id, int thread_id) 201 { 202 _contextId = context_id; 203 _threadId = thread_id; |
204 privateFlags.set(VALID_CONTEXT_ID|VALID_THREAD_ID); |
205 } 206 207 /** 208 * Set up a physical (e.g. device) request in a previously 209 * allocated Request object. 210 */ 211 void 212 setPhys(Addr _paddr, int _size, Flags _flags) 213 { 214 assert(_size >= 0); 215 paddr = _paddr; 216 size = _size; 217 time = curTick; 218 |
219 flags.clear(~STICKY_FLAGS); 220 flags.set(_flags); 221 privateFlags.clear(~STICKY_PRIVATE_FLAGS); 222 privateFlags.set(VALID_PADDR|VALID_SIZE); |
223 } 224 225 /** 226 * Set up a virtual (e.g., CPU) request in a previously 227 * allocated Request object. 228 */ 229 void 230 setVirt(int _asid, Addr _vaddr, int _size, Flags _flags, Addr _pc) 231 { 232 assert(_size >= 0); 233 asid = _asid; 234 vaddr = _vaddr; 235 size = _size; |
236 flags = _flags; |
237 pc = _pc; 238 time = curTick; 239 |
240 flags.clear(~STICKY_FLAGS); 241 flags.set(_flags); 242 privateFlags.clear(~STICKY_PRIVATE_FLAGS); 243 privateFlags.set(VALID_VADDR|VALID_SIZE|VALID_PC); |
244 } 245 246 /** 247 * Set just the physical address. This should only be used to 248 * record the result of a translation, and thus the vaddr must be 249 * valid before this method is called. Otherwise, use setPhys() 250 * to guarantee that the size and flags are also set. 251 */ 252 void 253 setPaddr(Addr _paddr) 254 { |
255 assert(privateFlags.isSet(VALID_VADDR)); |
256 paddr = _paddr; |
257 privateFlags.set(VALID_PADDR); |
258 } 259 260 /** 261 * Generate two requests as if this request had been split into two 262 * pieces. The original request can't have been translated already. 263 */ 264 void splitOnVaddr(Addr split_addr, RequestPtr &req1, RequestPtr &req2) 265 { |
266 assert(privateFlags.isSet(VALID_VADDR)); 267 assert(privateFlags.noneSet(VALID_PADDR)); |
268 assert(split_addr > vaddr && split_addr < vaddr + size); 269 req1 = new Request; 270 *req1 = *this; 271 req2 = new Request; 272 *req2 = *this; 273 req1->size = split_addr - vaddr; 274 req2->vaddr = split_addr; 275 req2->size = size - req1->size; 276 } 277 278 /** 279 * Accessor for paddr. 280 */ |
281 bool 282 hasPaddr() 283 { 284 return privateFlags.isSet(VALID_PADDR); 285 } 286 |
287 Addr 288 getPaddr() 289 { |
290 assert(privateFlags.isSet(VALID_PADDR)); |
291 return paddr; 292 } 293 294 /** 295 * Accessor for size. 296 */ |
297 bool 298 hasSize() 299 { 300 return privateFlags.isSet(VALID_SIZE); 301 } 302 |
303 int 304 getSize() 305 { |
306 assert(privateFlags.isSet(VALID_SIZE)); |
307 return size; 308 } 309 310 /** Accessor for time. */ 311 Tick 312 getTime() 313 { |
314 assert(privateFlags.isSet(VALID_PADDR|VALID_VADDR)); |
315 return time; 316 } 317 |
318 /** Accessor for flags. */ 319 Flags 320 getFlags() 321 { |
322 assert(privateFlags.isSet(VALID_PADDR|VALID_VADDR)); 323 return flags; |
324 } 325 |
326 void 327 setFlags(Flags _flags) 328 { |
329 assert(privateFlags.isSet(VALID_PADDR|VALID_VADDR)); |
330 flags.set(_flags); 331 } 332 |
333 /** Accessor function for vaddr.*/ 334 Addr 335 getVaddr() 336 { |
337 assert(privateFlags.isSet(VALID_VADDR)); |
338 return vaddr; 339 } 340 341 /** Accessor function for asid.*/ 342 int 343 getAsid() 344 { |
345 assert(privateFlags.isSet(VALID_VADDR)); |
346 return asid; 347 } 348 349 /** Accessor function for asi.*/ 350 uint8_t 351 getAsi() 352 { |
353 assert(privateFlags.isSet(VALID_VADDR)); |
354 return flags & ASI_BITS; 355 } 356 |
357 /** Accessor function for MMAPED_IPR flag. */ |
358 bool 359 isMmapedIpr() 360 { |
361 assert(privateFlags.isSet(VALID_PADDR)); |
362 return flags.isSet(MMAPED_IPR); 363 } 364 |
365 void 366 setMmapedIpr(bool r) 367 { 368 assert(VALID_VADDR); 369 flags.set(MMAPED_IPR); 370 } 371 372 /** Accessor function to check if sc result is valid. */ 373 bool 374 extraDataValid() 375 { |
376 return privateFlags.isSet(VALID_EXTRA_DATA); |
377 } 378 379 /** Accessor function for store conditional return value.*/ 380 uint64_t 381 getExtraData() const 382 { |
383 assert(privateFlags.isSet(VALID_EXTRA_DATA)); |
384 return extraData; 385 } 386 387 /** Accessor function for store conditional return value.*/ 388 void 389 setExtraData(uint64_t _extraData) 390 { 391 extraData = _extraData; |
392 privateFlags.set(VALID_EXTRA_DATA); |
393 } 394 395 bool 396 hasContextId() const 397 { |
398 return privateFlags.isSet(VALID_CONTEXT_ID); |
399 } 400 401 /** Accessor function for context ID.*/ 402 int 403 contextId() const 404 { |
405 assert(privateFlags.isSet(VALID_CONTEXT_ID)); |
406 return _contextId; 407 } 408 409 /** Accessor function for thread ID. */ 410 int 411 threadId() const 412 { |
413 assert(privateFlags.isSet(VALID_THREAD_ID)); |
414 return _threadId; 415 } 416 417 bool 418 hasPC() const 419 { |
420 return privateFlags.isSet(VALID_PC); |
421 } 422 423 /** Accessor function for pc.*/ 424 Addr 425 getPC() const 426 { |
427 assert(privateFlags.isSet(VALID_PC)); |
428 return pc; 429 } 430 431 /** Accessor Function to Check Cacheability. */ 432 bool isUncacheable() const { return flags.isSet(UNCACHEABLE); } 433 bool isInstRead() const { return flags.isSet(INST_READ); } 434 bool isLLSC() const { return flags.isSet(LLSC); } 435 bool isLocked() const { return flags.isSet(LOCKED); } --- 23 unchanged lines hidden --- |