dram_ctrl.cc (10213:2e630c6c2042) dram_ctrl.cc (10214:39eb5d4c400a)
1/*
2 * Copyright (c) 2010-2014 ARM Limited
3 * All rights reserved
4 *
5 * The license below extends only to copyright in the software and shall
6 * not be construed as granting a license to any other intellectual
7 * property including but not limited to intellectual property relating
8 * to a hardware implementation of the functionality of the software

--- 836 unchanged lines hidden (view full) ---

845 assert(bank.openRow != Bank::NO_ROW);
846
847 // sample the bytes per activate here since we are closing
848 // the page
849 bytesPerActivate.sample(bank.bytesAccessed);
850
851 bank.openRow = Bank::NO_ROW;
852
1/*
2 * Copyright (c) 2010-2014 ARM Limited
3 * All rights reserved
4 *
5 * The license below extends only to copyright in the software and shall
6 * not be construed as granting a license to any other intellectual
7 * property including but not limited to intellectual property relating
8 * to a hardware implementation of the functionality of the software

--- 836 unchanged lines hidden (view full) ---

845 assert(bank.openRow != Bank::NO_ROW);
846
847 // sample the bytes per activate here since we are closing
848 // the page
849 bytesPerActivate.sample(bank.bytesAccessed);
850
851 bank.openRow = Bank::NO_ROW;
852
853 // no precharge allowed before this one
854 bank.preAllowedAt = pre_at;
855
853 Tick pre_done_at = pre_at + tRP;
854
855 bank.actAllowedAt = std::max(bank.actAllowedAt, pre_done_at);
856
857 assert(numBanksActive != 0);
858 --numBanksActive;
859
860 DPRINTF(DRAM, "Precharging bank at tick %lld, now got %d active\n",

--- 439 unchanged lines hidden (view full) ---

1300 }
1301 }
1302
1303 // at this point, ensure that all banks are precharged
1304 if (refreshState == REF_PRE) {
1305 // precharge any active bank if we are not already in the idle
1306 // state
1307 if (pwrState != PWR_IDLE) {
856 Tick pre_done_at = pre_at + tRP;
857
858 bank.actAllowedAt = std::max(bank.actAllowedAt, pre_done_at);
859
860 assert(numBanksActive != 0);
861 --numBanksActive;
862
863 DPRINTF(DRAM, "Precharging bank at tick %lld, now got %d active\n",

--- 439 unchanged lines hidden (view full) ---

1303 }
1304 }
1305
1306 // at this point, ensure that all banks are precharged
1307 if (refreshState == REF_PRE) {
1308 // precharge any active bank if we are not already in the idle
1309 // state
1310 if (pwrState != PWR_IDLE) {
1311 // at the moment, we use a precharge all even if there is
1312 // only a single bank open
1308 DPRINTF(DRAM, "Precharging all\n");
1313 DPRINTF(DRAM, "Precharging all\n");
1314
1315 // first determine when we can precharge
1316 Tick pre_at = curTick();
1309 for (int i = 0; i < ranksPerChannel; i++) {
1310 for (int j = 0; j < banksPerRank; j++) {
1317 for (int i = 0; i < ranksPerChannel; i++) {
1318 for (int j = 0; j < banksPerRank; j++) {
1311 if (banks[i][j].openRow != Bank::NO_ROW) {
1312 // respect both causality and any existing bank
1313 // constraints
1314 Tick pre_at = std::max(banks[i][j].preAllowedAt,
1315 curTick());
1319 // respect both causality and any existing bank
1320 // constraints, some banks could already have a
1321 // (auto) precharge scheduled
1322 pre_at = std::max(banks[i][j].preAllowedAt, pre_at);
1323 }
1324 }
1316
1325
1326 // make sure all banks are precharged, and for those that
1327 // already are, update their availability
1328 Tick act_allowed_at = pre_at + tRP;
1329
1330 for (int i = 0; i < ranksPerChannel; i++) {
1331 for (int j = 0; j < banksPerRank; j++) {
1332 if (banks[i][j].openRow != Bank::NO_ROW) {
1317 prechargeBank(banks[i][j], pre_at);
1333 prechargeBank(banks[i][j], pre_at);
1334 } else {
1335 banks[i][j].actAllowedAt =
1336 std::max(banks[i][j].actAllowedAt, act_allowed_at);
1337 banks[i][j].preAllowedAt =
1338 std::max(banks[i][j].preAllowedAt, pre_at);
1318 }
1319 }
1320 }
1321 } else {
1322 DPRINTF(DRAM, "All banks already precharged, starting refresh\n");
1323
1324 // go ahead and kick the power state machine into gear if
1325 // we are already idle

--- 482 unchanged lines hidden --- 		1339 }
1340 }
1341 }
1342 } else {
1343 DPRINTF(DRAM, "All banks already precharged, starting refresh\n");
1344
1345 // go ahead and kick the power state machine into gear if
1346 // we are already idle

--- 482 unchanged lines hidden ---