| dram_ctrl.cc (10489:99d59caa4c8f) | dram_ctrl.cc (10492:59f9f18aae0c) |
|---|---|
| 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 --- 903 unchanged lines hidden (view full) --- 912 // 1) bank group architecture is not supportted 913 // 2) bank is in a different bank group 914 banks[rank][i].actAllowedAt = std::max(act_tick + tRRD, 915 banks[rank][i].actAllowedAt); 916 } 917 } 918 919 // next, we deal with tXAW, if the activation limit is disabled | 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 --- 903 unchanged lines hidden (view full) --- 912 // 1) bank group architecture is not supportted 913 // 2) bank is in a different bank group 914 banks[rank][i].actAllowedAt = std::max(act_tick + tRRD, 915 banks[rank][i].actAllowedAt); 916 } 917 } 918 919 // next, we deal with tXAW, if the activation limit is disabled |
| 920 // then we are done 921 if (actTicks[rank].empty()) 922 return; | 920 // then we directly schedule an activate power event 921 if (!actTicks[rank].empty()) { 922 // sanity check 923 if (actTicks[rank].back() && 924 (act_tick - actTicks[rank].back()) < tXAW) { 925 panic("Got %d activates in window %d (%llu - %llu) which " 926 "is smaller than %llu\n", activationLimit, act_tick - 927 actTicks[rank].back(), act_tick, actTicks[rank].back(), 928 tXAW); 929 } |
| 923 | 930 |
| 924 // sanity check 925 if (actTicks[rank].back() && (act_tick - actTicks[rank].back()) < tXAW) { 926 panic("Got %d activates in window %d (%llu - %llu) which is smaller " 927 "than %llu\n", activationLimit, act_tick - actTicks[rank].back(), 928 act_tick, actTicks[rank].back(), tXAW); 929 } | 931 // shift the times used for the book keeping, the last element 932 // (highest index) is the oldest one and hence the lowest value 933 actTicks[rank].pop_back(); |
| 930 | 934 |
| 931 // shift the times used for the book keeping, the last element 932 // (highest index) is the oldest one and hence the lowest value 933 actTicks[rank].pop_back(); | 935 // record an new activation (in the future) 936 actTicks[rank].push_front(act_tick); |
| 934 | 937 |
| 935 // record an new activation (in the future) 936 actTicks[rank].push_front(act_tick); 937 938 // cannot activate more than X times in time window tXAW, push the 939 // next one (the X + 1'st activate) to be tXAW away from the 940 // oldest in our window of X 941 if (actTicks[rank].back() && (act_tick - actTicks[rank].back()) < tXAW) { 942 DPRINTF(DRAM, "Enforcing tXAW with X = %d, next activate no earlier " 943 "than %llu\n", activationLimit, actTicks[rank].back() + tXAW); | 938 // cannot activate more than X times in time window tXAW, push the 939 // next one (the X + 1'st activate) to be tXAW away from the 940 // oldest in our window of X 941 if (actTicks[rank].back() && 942 (act_tick - actTicks[rank].back()) < tXAW) { 943 DPRINTF(DRAM, "Enforcing tXAW with X = %d, next activate " 944 "no earlier than %llu\n", activationLimit, 945 actTicks[rank].back() + tXAW); |
| 944 for(int j = 0; j < banksPerRank; j++) 945 // next activate must not happen before end of window 946 banks[rank][j].actAllowedAt = 947 std::max(actTicks[rank].back() + tXAW, 948 banks[rank][j].actAllowedAt); | 946 for(int j = 0; j < banksPerRank; j++) 947 // next activate must not happen before end of window 948 banks[rank][j].actAllowedAt = 949 std::max(actTicks[rank].back() + tXAW, 950 banks[rank][j].actAllowedAt); |
| 951 } |
|
| 949 } 950 951 // at the point when this activate takes place, make sure we 952 // transition to the active power state 953 if (!activateEvent.scheduled()) 954 schedule(activateEvent, act_tick); 955 else if (activateEvent.when() > act_tick) 956 // move it sooner in time --- 1183 unchanged lines hidden --- | 952 } 953 954 // at the point when this activate takes place, make sure we 955 // transition to the active power state 956 if (!activateEvent.scheduled()) 957 schedule(activateEvent, act_tick); 958 else if (activateEvent.when() > act_tick) 959 // move it sooner in time --- 1183 unchanged lines hidden --- |