packet.hh (4022:c422464ca16e) | packet.hh (4024:9eada81a030b) |
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1/* 2 * Copyright (c) 2006 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; --- 26 unchanged lines hidden (view full) --- 35 * Declaration of the Packet class. 36 */ 37 38#ifndef __MEM_PACKET_HH__ 39#define __MEM_PACKET_HH__ 40 41#include <cassert> 42#include <list> | 1/* 2 * Copyright (c) 2006 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; --- 26 unchanged lines hidden (view full) --- 35 * Declaration of the Packet class. 36 */ 37 38#ifndef __MEM_PACKET_HH__ 39#define __MEM_PACKET_HH__ 40 41#include <cassert> 42#include <list> |
43#include <bitset> | |
44 | 43 |
44#include "base/compiler.hh" |
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45#include "base/misc.hh" 46#include "mem/request.hh" 47#include "sim/host.hh" 48#include "sim/root.hh" 49 50 51struct Packet; 52typedef Packet *PacketPtr; --- 4 unchanged lines hidden (view full) --- 57#define NACKED_LINE (1 << 0) 58#define SATISFIED (1 << 1) 59#define SHARED_LINE (1 << 2) 60#define CACHE_LINE_FILL (1 << 3) 61#define COMPRESSED (1 << 4) 62#define NO_ALLOCATE (1 << 5) 63#define SNOOP_COMMIT (1 << 6) 64 | 45#include "base/misc.hh" 46#include "mem/request.hh" 47#include "sim/host.hh" 48#include "sim/root.hh" 49 50 51struct Packet; 52typedef Packet *PacketPtr; --- 4 unchanged lines hidden (view full) --- 57#define NACKED_LINE (1 << 0) 58#define SATISFIED (1 << 1) 59#define SHARED_LINE (1 << 2) 60#define CACHE_LINE_FILL (1 << 3) 61#define COMPRESSED (1 << 4) 62#define NO_ALLOCATE (1 << 5) 63#define SNOOP_COMMIT (1 << 6) 64 |
65 66class MemCmd 67{ 68 public: 69 70 /** List of all commands associated with a packet. */ 71 enum Command 72 { 73 InvalidCmd, 74 ReadReq, 75 WriteReq, 76 WriteReqNoAck, 77 ReadResp, 78 WriteResp, 79 Writeback, 80 SoftPFReq, 81 HardPFReq, 82 SoftPFResp, 83 HardPFResp, 84 InvalidateReq, 85 WriteInvalidateReq, 86 WriteInvalidateResp, 87 UpgradeReq, 88 ReadExReq, 89 ReadExResp, 90 NUM_MEM_CMDS 91 }; 92 93 private: 94 /** List of command attributes. */ 95 enum Attribute 96 { 97 IsRead, 98 IsWrite, 99 IsPrefetch, 100 IsInvalidate, 101 IsRequest, 102 IsResponse, 103 NeedsResponse, 104 IsSWPrefetch, 105 IsHWPrefetch, 106 IsUpgrade, 107 HasData, 108 NUM_COMMAND_ATTRIBUTES 109 }; 110 111 /** Structure that defines attributes and other data associated 112 * with a Command. */ 113 struct CommandInfo { 114 /** Set of attribute flags. */ 115 const std::bitset<NUM_COMMAND_ATTRIBUTES> attributes; 116 /** Corresponding response for requests; InvalidCmd if no 117 * response is applicable. */ 118 const Command response; 119 /** String representation (for printing) */ 120 const std::string str; 121 }; 122 123 /** Array to map Command enum to associated info. */ 124 static const CommandInfo commandInfo[]; 125 126 private: 127 128 Command cmd; 129 130 bool testCmdAttrib(MemCmd::Attribute attrib) const { 131 return commandInfo[cmd].attributes[attrib] != 0; 132 } 133 134 public: 135 136 bool isRead() const { return testCmdAttrib(IsRead); } 137 bool isWrite() const { return testCmdAttrib(IsWrite); } 138 bool isRequest() const { return testCmdAttrib(IsRequest); } 139 bool isResponse() const { return testCmdAttrib(IsResponse); } 140 bool needsResponse() const { return testCmdAttrib(NeedsResponse); } 141 bool isInvalidate() const { return testCmdAttrib(IsInvalidate); } 142 bool hasData() const { return testCmdAttrib(HasData); } 143 144 const Command responseCommand() const { 145 return commandInfo[cmd].response; 146 } 147 148 /** Return the string to a cmd given by idx. */ 149 const std::string &toString() const { 150 return commandInfo[cmd].str; 151 } 152 153 int toInt() const { return (int)cmd; } 154 155 MemCmd(Command _cmd) 156 : cmd(_cmd) 157 { } 158 159 MemCmd(int _cmd) 160 : cmd((Command)_cmd) 161 { } 162 163 MemCmd() 164 : cmd(InvalidCmd) 165 { } 166 167 bool operator==(MemCmd c2) { return (cmd == c2.cmd); } 168 bool operator!=(MemCmd c2) { return (cmd != c2.cmd); } 169 170 friend class Packet; 171}; 172 | 65//for now. @todo fix later 66#define NUM_MEM_CMDS (1 << 11) |
173/** 174 * A Packet is used to encapsulate a transfer between two objects in 175 * the memory system (e.g., the L1 and L2 cache). (In contrast, a 176 * single Request travels all the way from the requester to the 177 * ultimate destination and back, possibly being conveyed by several 178 * different Packets along the way.) 179 */ 180class Packet 181{ 182 public: | 67/** 68 * A Packet is used to encapsulate a transfer between two objects in 69 * the memory system (e.g., the L1 and L2 cache). (In contrast, a 70 * single Request travels all the way from the requester to the 71 * ultimate destination and back, possibly being conveyed by several 72 * different Packets along the way.) 73 */ 74class Packet 75{ 76 public: |
183 184 typedef MemCmd::Command Command; 185 | |
186 /** Temporary FLAGS field until cache gets working, this should be in coherence/sender state. */ 187 uint64_t flags; 188 189 private: 190 /** A pointer to the data being transfered. It can be differnt 191 * sizes at each level of the heirarchy so it belongs in the 192 * packet, not request. This may or may not be populated when a 193 * responder recieves the packet. If not populated it memory --- 79 unchanged lines hidden (view full) --- 273 public: 274 virtual ~SenderState() {} 275 }; 276 277 /** This packet's sender state. Devices should use dynamic_cast<> 278 * to cast to the state appropriate to the sender. */ 279 SenderState *senderState; 280 | 77 /** Temporary FLAGS field until cache gets working, this should be in coherence/sender state. */ 78 uint64_t flags; 79 80 private: 81 /** A pointer to the data being transfered. It can be differnt 82 * sizes at each level of the heirarchy so it belongs in the 83 * packet, not request. This may or may not be populated when a 84 * responder recieves the packet. If not populated it memory --- 79 unchanged lines hidden (view full) --- 164 public: 165 virtual ~SenderState() {} 166 }; 167 168 /** This packet's sender state. Devices should use dynamic_cast<> 169 * to cast to the state appropriate to the sender. */ 170 SenderState *senderState; 171 |
172 private: 173 /** List of command attributes. */ 174 // If you add a new CommandAttribute, make sure to increase NUM_MEM_CMDS 175 // as well. 176 enum CommandAttribute 177 { 178 IsRead = 1 << 0, 179 IsWrite = 1 << 1, 180 IsPrefetch = 1 << 2, 181 IsInvalidate = 1 << 3, 182 IsRequest = 1 << 4, 183 IsResponse = 1 << 5, 184 NeedsResponse = 1 << 6, 185 IsSWPrefetch = 1 << 7, 186 IsHWPrefetch = 1 << 8, 187 IsUpgrade = 1 << 9, 188 HasData = 1 << 10 189 }; 190 |
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281 public: | 191 public: |
192 /** List of all commands associated with a packet. */ 193 enum Command 194 { 195 InvalidCmd = 0, 196 ReadReq = IsRead | IsRequest | NeedsResponse, 197 WriteReq = IsWrite | IsRequest | NeedsResponse | HasData, 198 WriteReqNoAck = IsWrite | IsRequest | HasData, 199 ReadResp = IsRead | IsResponse | NeedsResponse | HasData, 200 WriteResp = IsWrite | IsResponse | NeedsResponse, 201 Writeback = IsWrite | IsRequest | HasData, 202 SoftPFReq = IsRead | IsRequest | IsSWPrefetch | NeedsResponse, 203 HardPFReq = IsRead | IsRequest | IsHWPrefetch | NeedsResponse, 204 SoftPFResp = IsRead | IsResponse | IsSWPrefetch 205 | NeedsResponse | HasData, 206 HardPFResp = IsRead | IsResponse | IsHWPrefetch 207 | NeedsResponse | HasData, 208 InvalidateReq = IsInvalidate | IsRequest, 209 WriteInvalidateReq = IsWrite | IsInvalidate | IsRequest 210 | HasData | NeedsResponse, 211 WriteInvalidateResp = IsWrite | IsInvalidate | IsRequest 212 | NeedsResponse | IsResponse, 213 UpgradeReq = IsInvalidate | IsRequest | IsUpgrade, 214 ReadExReq = IsRead | IsInvalidate | IsRequest | NeedsResponse, 215 ReadExResp = IsRead | IsInvalidate | IsResponse 216 | NeedsResponse | HasData 217 }; |
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282 | 218 |
283 /** The command field of the packet. */ 284 MemCmd cmd; 285 | |
286 /** Return the string name of the cmd field (for debugging and 287 * tracing). */ | 219 /** Return the string name of the cmd field (for debugging and 220 * tracing). */ |
288 const std::string &cmdString() const { return cmd.toString(); } | 221 const std::string &cmdString() const; |
289 | 222 |
223 /** Reutrn the string to a cmd given by idx. */ 224 const std::string &cmdIdxToString(Command idx); 225 |
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290 /** Return the index of this command. */ | 226 /** Return the index of this command. */ |
291 inline int cmdToIndex() const { return cmd.toInt(); } | 227 inline int cmdToIndex() const { return (int) cmd; } |
292 | 228 |
293 public: | 229 /** The command field of the packet. */ 230 Command cmd; |
294 | 231 |
295 bool isRead() const { return cmd.isRead(); } 296 bool isWrite() const { return cmd.isWrite(); } 297 bool isRequest() const { return cmd.isRequest(); } 298 bool isResponse() const { return cmd.isResponse(); } 299 bool needsResponse() const { return cmd.needsResponse(); } 300 bool isInvalidate() const { return cmd.isInvalidate(); } 301 bool hasData() const { return cmd.hasData(); } | 232 bool isRead() const { return (cmd & IsRead) != 0; } 233 bool isWrite() const { return (cmd & IsWrite) != 0; } 234 bool isRequest() const { return (cmd & IsRequest) != 0; } 235 bool isResponse() const { return (cmd & IsResponse) != 0; } 236 bool needsResponse() const { return (cmd & NeedsResponse) != 0; } 237 bool isInvalidate() const { return (cmd & IsInvalidate) != 0; } 238 bool hasData() const { return (cmd & HasData) != 0; } |
302 303 bool isCacheFill() const { return (flags & CACHE_LINE_FILL) != 0; } 304 bool isNoAllocate() const { return (flags & NO_ALLOCATE) != 0; } 305 bool isCompressed() const { return (flags & COMPRESSED) != 0; } 306 307 bool nic_pkt() { panic("Unimplemented"); M5_DUMMY_RETURN } 308 309 /** Possible results of a packet's request. */ --- 17 unchanged lines hidden (view full) --- 327 short getDest() const { return dest; } 328 void setDest(short _dest) { dest = _dest; } 329 330 Addr getAddr() const { assert(addrSizeValid); return addr; } 331 int getSize() const { assert(addrSizeValid); return size; } 332 Addr getOffset(int blkSize) const { return addr & (Addr)(blkSize - 1); } 333 334 void addrOverride(Addr newAddr) { assert(addrSizeValid); addr = newAddr; } | 239 240 bool isCacheFill() const { return (flags & CACHE_LINE_FILL) != 0; } 241 bool isNoAllocate() const { return (flags & NO_ALLOCATE) != 0; } 242 bool isCompressed() const { return (flags & COMPRESSED) != 0; } 243 244 bool nic_pkt() { panic("Unimplemented"); M5_DUMMY_RETURN } 245 246 /** Possible results of a packet's request. */ --- 17 unchanged lines hidden (view full) --- 264 short getDest() const { return dest; } 265 void setDest(short _dest) { dest = _dest; } 266 267 Addr getAddr() const { assert(addrSizeValid); return addr; } 268 int getSize() const { assert(addrSizeValid); return size; } 269 Addr getOffset(int blkSize) const { return addr & (Addr)(blkSize - 1); } 270 271 void addrOverride(Addr newAddr) { assert(addrSizeValid); addr = newAddr; } |
335 void cmdOverride(MemCmd newCmd) { cmd = newCmd; } | 272 void cmdOverride(Command newCmd) { cmd = newCmd; } |
336 337 /** Constructor. Note that a Request object must be constructed 338 * first, but the Requests's physical address and size fields 339 * need not be valid. The command and destination addresses 340 * must be supplied. */ | 273 274 /** Constructor. Note that a Request object must be constructed 275 * first, but the Requests's physical address and size fields 276 * need not be valid. The command and destination addresses 277 * must be supplied. */ |
341 Packet(Request *_req, MemCmd _cmd, short _dest) | 278 Packet(Request *_req, Command _cmd, short _dest) |
342 : data(NULL), staticData(false), dynamicData(false), arrayData(false), 343 addr(_req->paddr), size(_req->size), dest(_dest), 344 addrSizeValid(_req->validPaddr), 345 srcValid(false), 346 req(_req), coherence(NULL), senderState(NULL), cmd(_cmd), 347 result(Unknown) 348 { 349 flags = 0; 350 time = curTick; 351 } 352 353 /** Alternate constructor if you are trying to create a packet with 354 * a request that is for a whole block, not the address from the req. 355 * this allows for overriding the size/addr of the req.*/ | 279 : data(NULL), staticData(false), dynamicData(false), arrayData(false), 280 addr(_req->paddr), size(_req->size), dest(_dest), 281 addrSizeValid(_req->validPaddr), 282 srcValid(false), 283 req(_req), coherence(NULL), senderState(NULL), cmd(_cmd), 284 result(Unknown) 285 { 286 flags = 0; 287 time = curTick; 288 } 289 290 /** Alternate constructor if you are trying to create a packet with 291 * a request that is for a whole block, not the address from the req. 292 * this allows for overriding the size/addr of the req.*/ |
356 Packet(Request *_req, MemCmd _cmd, short _dest, int _blkSize) | 293 Packet(Request *_req, Command _cmd, short _dest, int _blkSize) |
357 : data(NULL), staticData(false), dynamicData(false), arrayData(false), 358 addr(_req->paddr & ~(_blkSize - 1)), size(_blkSize), 359 dest(_dest), 360 addrSizeValid(_req->validPaddr), srcValid(false), 361 req(_req), coherence(NULL), senderState(NULL), cmd(_cmd), 362 result(Unknown) 363 { 364 flags = 0; --- 28 unchanged lines hidden (view full) --- 393 * for returning as a response to that request. Used for timing 394 * accesses only. For atomic and functional accesses, the 395 * request packet is always implicitly passed back *without* 396 * modifying the destination fields, so this function 397 * should not be called. */ 398 void makeTimingResponse() { 399 assert(needsResponse()); 400 assert(isRequest()); | 294 : data(NULL), staticData(false), dynamicData(false), arrayData(false), 295 addr(_req->paddr & ~(_blkSize - 1)), size(_blkSize), 296 dest(_dest), 297 addrSizeValid(_req->validPaddr), srcValid(false), 298 req(_req), coherence(NULL), senderState(NULL), cmd(_cmd), 299 result(Unknown) 300 { 301 flags = 0; --- 28 unchanged lines hidden (view full) --- 330 * for returning as a response to that request. Used for timing 331 * accesses only. For atomic and functional accesses, the 332 * request packet is always implicitly passed back *without* 333 * modifying the destination fields, so this function 334 * should not be called. */ 335 void makeTimingResponse() { 336 assert(needsResponse()); 337 assert(isRequest()); |
401 cmd = cmd.responseCommand(); | 338 int icmd = (int)cmd; 339 icmd &= ~(IsRequest); 340 icmd |= IsResponse; 341 if (isRead()) 342 icmd |= HasData; 343 if (isWrite()) 344 icmd &= ~HasData; 345 cmd = (Command)icmd; |
402 dest = src; 403 srcValid = false; 404 } 405 | 346 dest = src; 347 srcValid = false; 348 } 349 |
350 351 void toggleData() { 352 int icmd = (int)cmd; 353 icmd ^= HasData; 354 cmd = (Command)icmd; 355 } 356 |
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406 /** 407 * Take a request packet and modify it in place to be suitable for 408 * returning as a response to that request. 409 */ 410 void makeAtomicResponse() 411 { 412 assert(needsResponse()); 413 assert(isRequest()); | 357 /** 358 * Take a request packet and modify it in place to be suitable for 359 * returning as a response to that request. 360 */ 361 void makeAtomicResponse() 362 { 363 assert(needsResponse()); 364 assert(isRequest()); |
414 cmd = cmd.responseCommand(); | 365 int icmd = (int)cmd; 366 icmd &= ~(IsRequest); 367 icmd |= IsResponse; 368 if (isRead()) 369 icmd |= HasData; 370 if (isWrite()) 371 icmd &= ~HasData; 372 cmd = (Command)icmd; |
415 } 416 417 /** 418 * Take a request packet that has been returned as NACKED and 419 * modify it so that it can be sent out again. Only packets that 420 * need a response can be NACKED, so verify that that is true. 421 */ 422 void --- 96 unchanged lines hidden --- | 373 } 374 375 /** 376 * Take a request packet that has been returned as NACKED and 377 * modify it so that it can be sent out again. Only packets that 378 * need a response can be NACKED, so verify that that is true. 379 */ 380 void --- 96 unchanged lines hidden --- |