cache.hh (4626:ed8aacb19c03) cache.hh (4628:17b3ce796176)
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;

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174 * Does all the processing necessary to perform the provided request.
175 * @param pkt The memory request to perform.
176 * @param lat The latency of the access.
177 * @param writebacks List for any writebacks that need to be performed.
178 * @param update True if the replacement data should be updated.
179 * @return Pointer to the cache block touched by the request. NULL if it
180 * was a miss.
181 */
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;

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174 * Does all the processing necessary to perform the provided request.
175 * @param pkt The memory request to perform.
176 * @param lat The latency of the access.
177 * @param writebacks List for any writebacks that need to be performed.
178 * @param update True if the replacement data should be updated.
179 * @return Pointer to the cache block touched by the request. NULL if it
180 * was a miss.
181 */
182 bool access(PacketPtr pkt, BlkType *blk, int & lat);
182 bool access(PacketPtr pkt, BlkType *&blk, int &lat);
183
184 /**
185 *Handle doing the Compare and Swap function for SPARC.
186 */
187 void cmpAndSwap(BlkType *blk, PacketPtr pkt);
188
189 /**
190 * Populates a cache block and handles all outstanding requests for the

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196 * @param writebacks List for any writebacks that need to be performed.
197 * @return Pointer to the new cache block.
198 */
199 BlkType *handleFill(PacketPtr pkt, BlkType *blk,
200 PacketList &writebacks);
201
202 bool satisfyCpuSideRequest(PacketPtr pkt, BlkType *blk);
203 bool satisfyTarget(MSHR::Target *target, BlkType *blk);
183
184 /**
185 *Handle doing the Compare and Swap function for SPARC.
186 */
187 void cmpAndSwap(BlkType *blk, PacketPtr pkt);
188
189 /**
190 * Populates a cache block and handles all outstanding requests for the

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196 * @param writebacks List for any writebacks that need to be performed.
197 * @return Pointer to the new cache block.
198 */
199 BlkType *handleFill(PacketPtr pkt, BlkType *blk,
200 PacketList &writebacks);
201
202 bool satisfyCpuSideRequest(PacketPtr pkt, BlkType *blk);
203 bool satisfyTarget(MSHR::Target *target, BlkType *blk);
204 void satisfyMSHR(MSHR *mshr, PacketPtr pkt, BlkType *blk);
204 bool satisfyMSHR(MSHR *mshr, PacketPtr pkt, BlkType *blk);
205
206 void doTimingSupplyResponse(PacketPtr req_pkt, uint8_t *blk_data);
207
208 /**
209 * Sets the blk to the new state.
210 * @param blk The cache block being snooped.
211 * @param new_state The new coherence state for the block.
212 */

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305
306 /**
307 * Allocate a new MSHR or write buffer to handle a miss.
308 * @param pkt The access that missed.
309 * @param time The time to continue processing the miss.
310 * @param isFill Whether to fetch & allocate a block
311 * or just forward the request.
312 */
205
206 void doTimingSupplyResponse(PacketPtr req_pkt, uint8_t *blk_data);
207
208 /**
209 * Sets the blk to the new state.
210 * @param blk The cache block being snooped.
211 * @param new_state The new coherence state for the block.
212 */

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305
306 /**
307 * Allocate a new MSHR or write buffer to handle a miss.
308 * @param pkt The access that missed.
309 * @param time The time to continue processing the miss.
310 * @param isFill Whether to fetch & allocate a block
311 * or just forward the request.
312 */
313 MSHR *allocateBuffer(PacketPtr pkt, Tick time, bool isFill,
314 bool requestBus);
313 MSHR *allocateBuffer(PacketPtr pkt, Tick time, bool requestBus);
315
316 /**
317 * Selects a outstanding request to service.
318 * @return The request to service, NULL if none found.
319 */
314
315 /**
316 * Selects a outstanding request to service.
317 * @return The request to service, NULL if none found.
318 */
319 PacketPtr getBusPacket(PacketPtr cpu_pkt, BlkType *blk,
320 bool needsExclusive);
320 MSHR *getNextMSHR();
321 MSHR *getNextMSHR();
321 PacketPtr getPacket();
322 PacketPtr getTimingPacket();
322
323 /**
324 * Marks a request as in service (sent on the bus). This can have side
325 * effect since storage for no response commands is deallocated once they
326 * are successfully sent.
327 * @param pkt The request that was sent on the bus.
328 */
329 void markInService(MSHR *mshr);
330
331 /**
323
324 /**
325 * Marks a request as in service (sent on the bus). This can have side
326 * effect since storage for no response commands is deallocated once they
327 * are successfully sent.
328 * @param pkt The request that was sent on the bus.
329 */
330 void markInService(MSHR *mshr);
331
332 /**
332 * Collect statistics and free resources of a satisfied request.
333 * @param pkt The request that has been satisfied.
334 * @param time The time when the request is satisfied.
335 */
336 void handleResponse(PacketPtr pkt, Tick time);
337
338 /**
339 * Perform the given writeback request.
340 * @param pkt The writeback request.
341 */
342 void doWriteback(PacketPtr pkt);
343
344 /**
345 * Return whether there are any outstanding misses.
346 */

--- 19 unchanged lines hidden --- 		333 * Perform the given writeback request.
334 * @param pkt The writeback request.
335 */
336 void doWriteback(PacketPtr pkt);
337
338 /**
339 * Return whether there are any outstanding misses.
340 */

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