--- /dev/null
+/*
+ * Copyright (c) 2004 The Regents of The University of Michigan
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met: redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer;
+ * redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution;
+ * neither the name of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Authors: Ali Saidi
+ * Ron Dreslinski
+ */
+
+/*
+ Copyright (c) 2000 Computer Engineering and Communication Networks Lab (TIK)
+ Swiss Federal Institute of Technology (ETH) Zurich, Switzerland
+
+ All rights reserved.
+ Permission is hereby granted, without written agreement and without
+ license or royalty fees, to use, copy, modify, and distribute this
+ software and its documentation for any purpose, provided that the above
+ copyright notice and the following two paragraphs appear in all copies
+ of this software.
+
+ IN NO EVENT SHALL THE TIK OR THE ETH ZURICH BE LIABLE TO ANY PARTY
+ FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
+ ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF
+ THE TIK OR THE ETH ZURICH HAVE BEEN ADVISED OF THE POSSIBILITY OF
+ SUCH DAMAGE.
+
+ THE TIK AND THE ETH ZURICH SPECIFICALLY DISCLAIM ANY WARRANTIES,
+ INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE
+ PROVIDED HEREUNDER IS ON AN "AS IS" BASIS, AND TIK AND THE ETH ZURICH
+ HAVE NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES,
+ ENHANCEMENTS, OR MODIFICATIONS.
+*/
+
+/* authors: Andreas Romer 4/99 - 7/99
+ Matthias Gries 4/99 - 2/01
+
+
+References: http://www.tik.ee.ethz.ch/
+======================================
+-> Publications http://www.tik.ee.ethz.ch/db/tik/publications/form_search_publications.php3
+
+
+Matthias Gries: A Survey of Synchronous RAM Architectures.
+TIK Report Nr. 71, Computer Engineering and Networks Lab (TIK),
+Swiss Federal Institute of Technology (ETH) Zurich, April, 1999
+
+-> DRAM survey
+
+
+Matthias Gries, Andreas Romer: Performance Evaluation of Recent
+DRAM Architectures for Embedded Systems.
+TIK Report Nr. 82, Computer Engineering and Networks Lab (TIK),
+Swiss Federal Institute of Technology (ETH) Zurich, November, 1999.
+
+-> description of the DRAM and controller models for SimpleScalar in the appendix
+(note that the current software version additionally supports overlapping in
+ closed-page mode with slightly modified timing)
+
+
+Matthias Gries: The Impact of Recent DRAM Architectures on Embedded Systems Performance.
+Euromicro2000, Symposium on Digital Systems Design, IEEE Computer, Maastricht, Netherlands,
+Vol. 1, pages 282-289, September, 2000.
+
+-> performance study with SimpleScalar
+
+
+Matthias Gries: Modeling a Memory Subsystem with Petri Nets: a Case Study.
+A. Yakovlev, L. Gomes, and L. Lavagno (Eds), Hardware Design and Petri Nets,
+Kluwer Academic, pages 291-310, March, 2000.
+
+-> SDRAM + controller performance model as a high-level Petri net
+*/
+
+/**
+ * @file
+ * Definition of a DRAM like main memory.
+ */
+
+
+#include "mem/dram.hh"
+#include "sim/builder.hh"
+
+#include <string>
+
+extern int maxThreadsPerCPU;
+
+/* SDRAM system: PC100/PC133 2-2-2 DIMM timing according to
+ PC SDRAM Specification, Rev. 1.7, Intel Corp, Nov. 1999.
+
+ 64 bit DIMM consists of four 16x organized 256 Mbit SDRAMs, 128 MByte of main memory in total.*/
+/* the settings above must be changed if another memory is used */
+/* DRDRAM system: 16 bit channel, four chips (single RIMM), 128 MByte of main memory in total.
+ Timing: Rambus Inc, Direct RDRAM, preliminary information, 256/288Mbit: 40-800 timing */
+
+
+#define DR_STACK_BASE 0x8000000 /* total size of memory: 128 Mbyte */
+#define DR_BANK_SIZE 0x100000 /* size of a bank : 1 Mbyte */
+#define DR_ROW_SIZE 0x800 /* size of a row : 2 Kbyte */
+#define DR_NUM_BANKS (DR_STACK_BASE/DR_BANK_SIZE) /* number of banks : 128 */
+#define DR_NUM_ROWS (DR_BANK_SIZE/DR_ROW_SIZE) /* number of rows per bank: 512 */
+#define DR_DATA_BASE 0x4000000 /* Size of textsegment : 64 Mbyte */
+#define DR_NUM_BYTE_MEM 16 /* data packet capacity: 16 byte */
+#define DR_NUM_DEVS 4 /* number of devices along channel */
+#define DR_BANK_SAMP 16 /* 16 banks are together in one group in each device: bank 15 and 16 have no shared SAMPs */
+#define DR_T_PACKET 4 /* number of cycles (in 400 MHz) the memory needs to deliver a data packet */
+#define DR_T_RCD 7 /* RAS to CAS delay */
+#define DR_T_CAC 8 /* read access delay: number of cylces from read to data (trailing to leading edge of packet!) */
+#define DR_T_CWD 6 /* Write delay: number of cylces from write to write data (trailing to leading edge of packet!) */
+#define DR_T_RP 8 /* row precharge delay */
+#define DR_T_RTR 8 /* retire delay*/
+#define DR_T_RDP 4 /* min delay from read to precharge in cycles */
+#define DR_T_PP 8 /* precharge to precharge time to any bank in the same device */
+#define DR_T_RAS 20 /* minimal row active time */
+/*the settings above need to be changed if the memory is altered*/
+#define DR_DYNAMIC_SIZE (DR_STACK_BASE - DR_DATA_BASE) /* size of the heap and stack at most: 64 Mbyte */
+// #define DR_NUM_BANKS (DR_STACK_BASE/DR_BANK_SIZE) /* number of banks : 128 */
+// #define DR_NUM_ROWS (DR_BANK_SIZE/DR_ROW_SIZE) /* number of rows per bank: 512 */
+#define DR_T_OWR (DR_T_CWD + DR_T_PACKET - DR_T_RTR) /* overlap after write retire */
+#define DR_T_HELP (DR_T_CAC+DR_T_PACKET-DR_T_RDP+DR_T_PACKET) /* used for read after read with precharge */
+/*delays until data is ready/written to the memory for the DRDRAM*/
+#define DR_T_READ_READ_SROW (DR_T_CAC + DR_T_PACKET) /* RAR, row hit, current bank */
+#define DR_T_READ_WRITE_SROW (DR_T_CAC + DR_T_PACKET) /* RAW, row hit, current bank */
+#define DR_T_WRITE_READ_SROW (DR_T_CWD + DR_T_PACKET) /* WAR, row hit, current bank */
+#define DR_T_WRITE_WRITE_SROW (DR_T_CWD + DR_T_PACKET) /* WAW, row hit, current bank */
+#define DR_T_READ_READ_SBANK (DR_T_RP+DR_T_RCD+DR_T_CAC+DR_T_PACKET) /* RAR, row miss, current bank */
+#define DR_T_READ_WRITE_SBANK (DR_T_RP+DR_T_RCD+DR_T_CAC+DR_T_PACKET) /* RAW, row miss, current bank */
+#define DR_T_WRITE_READ_SBANK (DR_T_RP+DR_T_RCD+DR_T_CWD+DR_T_PACKET) /* WAR, row miss, current bank */
+#define DR_T_WRITE_WRITE_SBANK (DR_T_RP+DR_T_RCD+DR_T_CWD+DR_T_PACKET) /* WAR, row miss, current bank */
+#define DR_T_READ_READ_OBANK (DR_T_PP+DR_T_RP+DR_T_RCD+DR_T_CAC+DR_T_PACKET) /* RAR, row miss, another bank */
+#define DR_T_READ_WRITE_OBANK (DR_T_PP+DR_T_RP+DR_T_RCD+DR_T_CAC+DR_T_PACKET) /* RAW, row miss, another bank */
+#define DR_T_WRITE_READ_OBANK (DR_T_PP+DR_T_RP+DR_T_RCD+DR_T_CWD+DR_T_PACKET) /* WAR, row miss, another bank */
+#define DR_T_WRITE_WRITE_OBANK (DR_T_PP+DR_T_RP+DR_T_RCD+DR_T_CWD+DR_T_PACKET) /* WAR, row miss, another bank */
+/* best-case latencies (due to overlap / row hits in another bank) */
+#define DR_BEST_T_READ_READ_SROW 0 /* RAR, row hit, current bank */
+#define DR_BEST_T_READ_WRITE_SROW (DR_T_CAC+DR_T_PACKET-DR_T_OWR) /* RAW, row hit, current bank */
+#define DR_BEST_T_WRITE_READ_SROW 0 /* WAR, row hit, current bank */
+#define DR_BEST_T_WRITE_WRITE_SROW (DR_T_CWD+DR_T_PACKET-DR_T_OWR) /* WAR, row hit, current bank */
+#define DR_BEST_T_READ_READ_SBANK (DR_T_RCD + DR_T_CAC) /* RAR, row miss, current bank */
+#define DR_BEST_T_READ_WRITE_SBANK (DR_T_RP-DR_T_OWR+DR_T_RCD+DR_T_CAC+DR_T_PACKET) /* RAW, row miss, current bank */
+#define DR_BEST_T_WRITE_READ_SBANK (DR_T_RCD+DR_T_CWD) /* WAR, row miss, current bank */
+#define DR_BEST_T_WRITE_WRITE_SBANK (DR_T_RP-DR_T_OWR+DR_T_RCD+DR_T_CWD+DR_T_PACKET) /* WAW, row miss, current bank */
+#define DR_BEST_T_READ_READ_OBANK 0 /* RAR, row miss/hit, another bank */
+#define DR_BEST_T_READ_WRITE_OBANK (DR_T_PACKET+DR_T_CAC-DR_T_OWR) /* RAW, row miss/hit, another bank */
+#define DR_BEST_T_WRITE_READ_OBANK 0 /* WAR, row miss/hit, another bank */
+#define DR_BEST_T_WRITE_WRITE_OBANK 0 /* WAW, row miss/hit, another bank */
+#define DR_BEST_T_READ_WRITE_ODEV (DR_T_CAC-DR_T_CWD) /* RAW, row miss/hit, another device */
+
+
+#define MIN(a,b) ((a<b) ? a : b)
+#define SD_ROW_SIZE 0x1000 /* size of a row : 4 Kbyte */
+
+
+
+DRAMMemory::DRAMMemory(Params *p)
+ : PhysicalMemory(p), cpu_ratio(p->cpu_ratio), bus_width(p->bus_width),
+ mem_type(p->mem_type), mem_actpolicy(p->mem_actpolicy),
+ memctrladdr_type(p->memctrladdr_type), act_lat(p->act_lat),
+ cas_lat(p->cas_lat), war_lat(p->war_lat),
+ pre_lat(p->pre_lat), dpl_lat(p->dpl_lat),
+ trc_lat(p->trc_lat), num_banks(p->num_banks),
+ num_cpus(p->num_cpus), last_dev(DR_NUM_DEVS+1),
+ lastCmdIsRead(true), precharge(0), same_row_read_access(0), srr_after_read(0),
+ srr_after_write(0), same_row_write_access(0), srw_after_read(0),
+ srw_after_write(0), same_bank_read_access(0), sbr_after_read(0),
+ sbr_after_write(0), same_bank_write_access(0), sbw_after_read(0),
+ sbw_after_write(0), other_bank_read_access_hit(0), obr_after_read_hit(0),
+ obr_after_write_hit(0), other_bank_write_access_hit(0),
+ obw_after_read_hit(0), obw_after_write_hit(0), obr_after_read_miss(0),
+ obr_after_write_miss(0),
+ obw_after_read_miss(0), obw_after_write_miss(0), total_access(0),
+ adjacent_access(0), adjacent_read(0), adjacent_write(0),
+ command_overlapping(0), best_case(0), in_between_case(0), worst_case(0),
+ full_overlapping(0), partial_overlapping(0), mem_access_details(false),
+ memctrlpipe_enable(false), time_last_access(0)
+{
+ warn("This DRAM module has not been tested with the new memory system at all!");
+ bank_size = (params()->addrRange.size() + 1) / num_banks;
+ num_rows = bank_size / SD_ROW_SIZE; /* 0x1000 size of row 4Kbtye */
+ active_row = new int[num_banks];
+ last_bank = num_banks+1;
+ last_row = num_rows;
+ busy_until = new Tick[num_banks];
+ memset(busy_until,0,sizeof(Tick)*num_banks); /* initiliaze */
+
+}
+
+void
+DRAMMemory::regStats()
+{
+ using namespace Stats;
+
+ accesses
+ .init(maxThreadsPerCPU)
+ .name(name() + ".accesses")
+ .desc("total number of accesses")
+ .flags(total)
+ ;
+
+ bytesRequested
+ .init(maxThreadsPerCPU)
+ .name(name() + ".bytes_requested")
+ .desc("total number of bytes requested")
+ .flags(total)
+ ;
+
+ bytesSent
+ .init(maxThreadsPerCPU)
+ .name(name() + ".bytes_sent")
+ .desc("total number of bytes sent")
+ .flags(total)
+ ;
+
+ compressedAccesses
+ .init(maxThreadsPerCPU)
+ .name(name() + ".compressed_responses")
+ .desc("total number of accesses that are compressed")
+ .flags(total)
+ ;
+
+ // stats for power modelling
+ cycles_nCKE
+ .init(1)
+ .name(name() + ".cycles_nCKE")
+ .desc("cycles when CKE is low")
+ .flags(total)
+ ;
+
+ cycles_all_precharge_CKE
+ .init(1)
+ .name(name() + ".cycles_all_precharge_CKE")
+ .desc("cycles when all banks precharged")
+ .flags(total)
+ ;
+
+ cycles_all_precharge_nCKE
+ .init(1)
+ .name(name() + ".cycles_all_precharge_nCKE")
+ .desc("cycles when all banks precharged and CKE is low")
+ .flags(total)
+ ;
+
+ cycles_bank_active_nCKE
+ .init(1)
+ .name(name() + ".cycles_bank_active_nCKE")
+ .desc("cycles when banks active and CKE low")
+ .flags(total)
+ ;
+
+ // we derive this from other stats later
+ // so DR TODO for now this counter is unused
+ cycles_avg_ACT
+ .init(1)
+ .name(name() + ".cycles_avg_ACT")
+ .desc("avg cycles between ACT commands")
+ .flags(total)
+ ;
+
+ cycles_read_out
+ .init(1)
+ .name(name() + ".cycles_read_out")
+ .desc("cycles outputting read data")
+ .flags(total)
+ ;
+
+ cycles_write_in
+ .init(1)
+ .name(name() + ".cycles_write_in")
+ .desc("cycles inputting write data")
+ .flags(total)
+ ;
+
+ cycles_between_misses
+ .init(1)
+ .name(name() + ".cycles_between_misses")
+ .desc("cycles between open page misses")
+ .flags(total)
+ ;
+
+ other_bank_read_access_miss
+ .init(1)
+ .name(name() + ".other_bank_read_access_miss")
+ .desc("read miss count")
+ .flags(total)
+ ;
+
+ other_bank_write_access_miss
+ .init(1)
+ .name(name() + ".other_bank_write_access_miss")
+ .desc("write miss count")
+ .flags(total)
+ ;
+
+ // DR TODO for now, only output stats which are involved in power equations
+ total_latency
+ .name(name() + ".total_latency")
+ .desc("total DRAM latency")
+ ;
+
+ total_arb_latency
+ .name(name() + ".total_arb_latency")
+ .desc("total arbitration latency")
+ ;
+
+ avg_latency
+ .name(name() + ".avg_latency")
+ .desc("average DRAM latency")
+ ;
+
+ avg_arb_latency
+ .name(name() + ".avg_arb_latency")
+ .desc("average arbitration DRAM latency")
+ ;
+
+ bank_access_profile
+ .init(num_banks,num_cpus)
+ .name(name() + "[cpu][bank]")
+ .desc("DRAM bank access profile")
+ ;
+
+ total_icache_req
+ .name(name() + ".total_icache_req")
+ .desc("total number of requests from icache")
+ ;
+
+ avg_latency = total_latency / accesses;
+ avg_arb_latency = total_arb_latency / accesses;
+}
+
+
+
+
+// DR DEBUG: assume we have a 500 MHz CPU and 100 MHz RAM
+// static float cpu_ratio = 5; // ratio between CPU speed and memory bus speed
+// DR TODO: get this parameter from the simulation
+
+static char *mem_access_output=NULL;
+ /* latency of access [CPU cycles]*/
+Tick
+DRAMMemory::calculateLatency(Packet *pkt)
+{
+
+ bool cmdIsRead = pkt->isRead();
+
+ int lat=0, temp=0, current_bank=0;
+ int current_row=0, current_device=0;
+
+ int was_miss = 0; // determines if there was an active row miss this access
+
+ //md_addr_t physic_address; /* linear memory address to be accessed */
+ Addr physic_address; /* linear memory address to be accessed */
+
+ int num_blocks=0;
+ int corrected_overlap, /* overlap of consecutive accesses [CPU cycles] */
+ overlap=0; /* overlap of consecutive accesses [mem bus cycles] */
+ int adjacent=0; /* 1 indicates that current bank is adjacent to the last accessed one*/
+
+ int chunks = (pkt->getSize() + (bus_width - 1)) / bus_width; // burst length
+ assert(chunks >0);
+ physic_address = pkt->getAddr();
+
+ ///////////////////////////////////////////////////////////////////////////
+ // DR added more stats for power modelling
+ // NOTE:
+ // for DRAM closed-page, automatic precharge after read or write,
+ // i.e. whenever idle
+
+
+ // count number of cycles where dram is not busy, use for CKE low signal
+ // calculate as percentage of all clock cycles
+ // if busy, do not add to idle count. Else add cycles since last access
+/* #define SD_NUM_BANKS (SD_STACK_BASE/SD_BANK_SIZE) */ /* number of banks */
+/* #define SD_NUM_ROWS (SD_BANK_SIZE/SD_ROW_SIZE) */ /* number of rows per bank */
+/*delays until data is ready/written to the memory for the SDRAM*/
+ int SD_T_READ_READ_SROW = cas_lat; /* RAR, row hit, current bank */
+ int SD_T_READ_WRITE_SROW = cas_lat; /* RAW, row hit, current bank */
+ int SD_T_WRITE_READ_SROW = war_lat-1; /* WAR, row hit, current bank */
+ int SD_T_WRITE_WRITE_SROW = 0; /* WAW, row hit, current bank */
+ int SD_T_READ_READ_SBANK = (pre_lat+act_lat+cas_lat); /* RAR, row miss, current bank */
+ int SD_T_READ_WRITE_SBANK = (pre_lat+act_lat+cas_lat+(dpl_lat-1)); /* RAW, row miss, current bank */
+ int SD_T_WRITE_READ_SBANK = (pre_lat+act_lat); /* WAR, row miss, current bank */
+ int SD_T_WRITE_WRITE_SBANK = (pre_lat+act_lat+(dpl_lat-1)); /* WAW, row miss, current bank */
+ int SD_T_READ_READ_OBANK = (pre_lat+act_lat+cas_lat); /* RAR, row miss, another bank */
+ int SD_T_READ_WRITE_OBANK = (pre_lat+act_lat+cas_lat); /* RAW, row miss, another bank */
+ int SD_T_WRITE_READ_OBANK = (pre_lat+act_lat); /* WAR, row miss, another bank */
+ int SD_T_WRITE_WRITE_OBANK = (pre_lat+act_lat); /* WAW, row miss, another bank */
+/* best-case latencies (due to overlap / row hits in another bank) */
+ int SD_BEST_T_READ_READ_SROW = 0; /* RAR, row hit, current bank */
+ int SD_BEST_T_READ_READ_SBANK = (act_lat+cas_lat); /* RAR, row miss, current bank */
+ int SD_BEST_T_WRITE_READ_SBANK = (act_lat); /* WAR, row miss, current bank */
+ int SD_BEST_T_READ_READ_OBANK = 0; /* RAR, row miss/hit, another bank */
+ int SD_BEST_T_READ_WRITE_OBANK = cas_lat; /* RAW, row miss/hit, another bank */
+ int SD_BEST_T_WRITE_READ_OBANK = (war_lat -1); /* WAR, row miss/hit, another bank */
+ int SD_BEST_T_WRITE_WRITE_OBANK = 0; /* WAW, row miss/hit, another bank */
+
+ Tick time_since_last_access = curTick-time_last_access;
+ Tick time_last_miss = 0; // used for keeping track of times between activations (page misses)
+ //int was_idle = (curTick > busy_until);
+ bool srow_flag = false;
+ int timing_correction = 0;
+
+ int was_idle = (curTick > busy_until[current_bank]);
+ cycles_nCKE[0] += was_idle ? MIN(curTick-busy_until[current_bank], time_since_last_access) : 0;
+
+ // bank is precharged
+ //active_row[current_bank] == DR_NUM_ROWS
+ int all_precharged = 1;
+ int bank_max = num_banks;
+ int row_max = num_rows;
+
+ if( (mem_type == "SDRAM") && (mem_actpolicy == "closed") ) {
+ // SDRAM does not use the active_row array in closed_page mode
+ // TODO: handle closed page operation
+
+ } else { // DRDRAM uses the active_row array
+ for( int i = 0; i < bank_max; i++ ) {
+ if( (active_row[current_bank] != row_max)) all_precharged = 0;
+ }
+ }
+
+ if(all_precharged) {
+ if(was_idle) {
+ cycles_all_precharge_nCKE[0] += MIN(curTick-busy_until[current_bank], time_since_last_access);
+ cycles_all_precharge_CKE[0] += MIN(0, busy_until[current_bank]-time_last_access);
+ }
+ else {
+ cycles_all_precharge_CKE[0] += time_since_last_access;
+ }
+ } else { // some bank is active
+ if(was_idle) {
+ cycles_bank_active_nCKE[0] += MIN(curTick-busy_until[current_bank], time_since_last_access);
+ }
+ else {
+ }
+ }
+
+ if( cmdIsRead ) {
+ cycles_read_out[0] += chunks;
+ } else {
+ cycles_write_in[0] += chunks;
+ }
+
+
+ time_last_access = curTick;
+ ////////////////////////////////////////////////////////////////////////////
+
+ if ((mem_type == "SDRAM") && (mem_actpolicy == "open"))
+ {
+ /* Split transaction on m5 makes it challenging to */
+ /* model the DRAM. A single cycle latency is assumed */
+ /* for dequeueing an address bus request. In response to */
+ /* that, the current DRAM implementation assumes that a */
+ /* seperate DRAM command generator / controller exists per */
+ /* bank and the dequeued addresses are queued to these */
+ /* controllers. We can view this as an ideal scenario for */
+ /* a shared DRAM command generator / controller with */
+ /* support for overlapping DRAM commands. */
+ /* Compare DRAM PRE,ACT,CAS etc. latencies, DRAM clock */
+ /* frequency and the number of banks to determine whether */
+ /* the ideal scenario with a shared DRAM command generator */
+ /* is equivalent to having multiple DRAM command generators */
+ /* per bank */
+ if ((memctrladdr_type != "interleaved"))/* i.e. mc_type is linear */
+ {
+ current_bank=physic_address/bank_size;
+ temp=physic_address-current_bank*bank_size;/*address in bank*/
+ current_row=temp/SD_ROW_SIZE;
+ }
+ else/* mc_type interleaved */
+ /* This memory controller maps the addresses differently
+ * depending on the row_size, every row is mapped to another
+ * bank. Thus, the text segment uses half of every bank, the heap
+ * the next quarter of each bank, and the stack the rest.
+ */
+
+ {
+ num_blocks = physic_address/SD_ROW_SIZE; /* row number */
+ current_bank=num_blocks%num_banks;
+ current_row=num_blocks/num_banks;
+ }
+
+ if (mem_access_details == true)
+ {
+ // DR TODO
+ //fprintf(mem_accessfd," %09u %4d %3d\n",physic_address,current_row,current_bank);
+ }
+ else
+ {
+ if (mem_access_output!=0)
+ {
+ //fprintf(mem_accessfd,"\n");
+ }
+ }
+ total_access++;
+
+ if (memctrlpipe_enable == true)
+ {
+ overlap=(int)(busy_until[current_bank] - curTick);
+ }
+ else overlap = 0;
+
+ if (cpu_ratio < 1.0)
+ {
+ corrected_overlap = overlap*((int)(1/cpu_ratio)); /* floor */
+ }
+ else
+ {
+ corrected_overlap = (int) (overlap/cpu_ratio);
+ }
+
+ /*fprintf(stderr,"%10.0f %10.0f %4d %4d ",(double)busy_until, (double)curTick, overlap, corrected_overlap); debugging*/
+
+ if (cmdIsRead == lastCmdIsRead)/*same command*/
+ {
+ if (current_bank == last_bank)/*same bank*/
+ {
+ if (current_row == last_row)/*same row*/
+ {
+ /* Page Hit */
+ if (cmdIsRead)
+ {
+ if (corrected_overlap > 0)/*overlapping*/
+ {
+ /*best case*/
+ if (corrected_overlap >= cas_lat)
+ {
+ lat=SD_BEST_T_READ_READ_SROW;
+ srow_flag = true;
+ best_case++;
+ full_overlapping++;
+ }
+ else/*in between case*/
+ {
+ lat = cas_lat-corrected_overlap;
+ srow_flag = true;
+ in_between_case++;
+ partial_overlapping++;
+ }
+ }
+ else
+ {
+ /*worst case*/
+ lat = SD_T_READ_READ_SROW;
+ srow_flag = true;
+ worst_case++;
+ }
+ same_row_read_access++;
+ srr_after_read++;
+ }
+ else/*write*/
+ {/*no option case*/
+ lat = SD_T_WRITE_WRITE_SROW;
+ srow_flag = true;
+ same_row_write_access++;
+ srw_after_write++;
+ worst_case++;
+ }
+ }
+ else /*other row in same bank*/
+ {
+ /* Page miss */
+ if (cmdIsRead)
+ {
+ if (corrected_overlap > 0)/*overlapping*/
+ {
+ if (corrected_overlap >= pre_lat)/*best case*/
+ {
+ lat = SD_BEST_T_READ_READ_SBANK;
+ best_case++;
+ full_overlapping++;
+ }
+ else/*in between case*/
+ {
+ lat = SD_T_READ_READ_SBANK-corrected_overlap;
+ in_between_case++;
+ partial_overlapping++;
+ }
+ }
+ else/*worst case*/
+ {
+ lat = SD_T_READ_READ_SBANK;
+ worst_case++;
+ }
+ same_bank_read_access++;
+ sbr_after_read++;
+ }
+ else/*write*/
+ {/*no option case*/
+ lat = SD_T_WRITE_WRITE_SBANK;
+ same_bank_write_access++;
+ sbw_after_write++;
+ worst_case++;
+ }
+ }
+ }
+ else /*other bank*/
+ {
+ if (cmdIsRead)
+ {
+ /* Page empty */
+ if (current_row == active_row[current_bank])/*row is still active*/
+ {
+ if (corrected_overlap > 0 )/*overlapping*/
+ {
+ if(corrected_overlap >= pre_lat)/*best case*/
+ {
+ lat = SD_BEST_T_READ_READ_OBANK;
+ best_case++;
+ full_overlapping++;
+ }
+ else/*in between case*/
+ {
+ lat = SD_T_READ_READ_OBANK - corrected_overlap;
+ in_between_case++;
+ partial_overlapping++;
+ }
+ }
+ else/*in between case*/
+ {
+ lat = SD_T_READ_READ_OBANK;
+ in_between_case++;
+ }
+ other_bank_read_access_hit++;
+ obr_after_read_hit++;
+ }
+ else/*row is not active*/
+ {
+ if (corrected_overlap > 0 )/*overlapping*/
+ {
+ if(corrected_overlap >= SD_T_READ_READ_OBANK )/*best case*/
+ {
+ lat = SD_BEST_T_READ_READ_OBANK;
+ best_case++;
+ full_overlapping++;
+ }
+ else/*in between case*/
+ {
+ lat = SD_T_READ_READ_OBANK-corrected_overlap;
+ in_between_case++;
+ partial_overlapping++;
+ }
+ }
+ else/*worst case*/
+ {
+ lat = SD_T_READ_READ_OBANK;
+ worst_case++;
+ }
+
+ // DR keep track of time between misses
+ was_miss = 1;
+
+ other_bank_read_access_miss[0]++;
+ obr_after_read_miss++;
+ }
+ }
+ else/*write*/
+ {
+ if (current_row == active_row[current_bank])/*row is still active*/
+ { /*best_case*/
+ lat = SD_BEST_T_WRITE_WRITE_OBANK;
+ best_case++;
+ other_bank_write_access_hit++;
+ obw_after_write_hit++;
+ }
+ else/*row is not active*/
+ {
+ if (corrected_overlap > 0 )/*overlapping*/
+ {
+ if(corrected_overlap >=SD_T_WRITE_WRITE_OBANK)/*best case*/
+ {
+ lat = SD_BEST_T_WRITE_WRITE_OBANK;
+ best_case++;
+ full_overlapping++;
+ }
+ else/*in between case*/
+ {
+ lat = SD_T_WRITE_WRITE_OBANK-corrected_overlap;
+ in_between_case++;
+ partial_overlapping++;
+ }
+ }
+ else/*worst case*/
+ {
+ lat = SD_T_WRITE_WRITE_OBANK;
+ worst_case++;
+ }
+
+ // DR keep track of time between misses
+ was_miss = 1;
+
+ other_bank_write_access_miss[0]++;
+ obw_after_write_miss++;
+
+ }
+ }
+ }
+ }
+ else /*lastCmdIsRead != cmdIsRead*/
+ {
+ if (current_bank == last_bank)/*same bank*/
+ {
+ if (current_row == last_row)/*same row*/
+ {
+ /* Page Hit */
+ if (cmdIsRead)
+ {/*worst case*/
+ lat = SD_T_READ_WRITE_SROW;
+ srow_flag = true;
+ same_row_read_access++;
+ srr_after_write++;
+ worst_case++;
+ }
+ else/*write*/
+ {/*worst case*/
+ lat = SD_T_WRITE_READ_SROW;
+ srow_flag = true;
+ same_row_write_access++;
+ srw_after_read++;
+ worst_case++;
+ }
+ }
+ else /*other row in same bank*/
+ {
+ /* Page Miss */
+ if (cmdIsRead)
+ {/*worst case*/
+ lat = SD_T_READ_WRITE_SBANK;
+ same_bank_read_access++;
+ sbr_after_write++;
+ worst_case++;
+ }
+ else/*write*/
+ {
+ if (corrected_overlap > 0 )/*overlapping*/
+ {
+ if (corrected_overlap >= pre_lat)/*best case*/
+ {
+ lat = SD_BEST_T_WRITE_READ_SBANK;
+ best_case++;
+ full_overlapping++;
+ }
+ else/*in between case*/
+ {
+ lat = SD_T_WRITE_READ_SBANK-corrected_overlap;
+ in_between_case++;
+ partial_overlapping++;
+ }
+ }
+ else/*worst case*/
+ {
+ lat = SD_T_WRITE_READ_OBANK;
+ worst_case++;
+ }
+ same_bank_write_access++;
+ sbw_after_read++;
+ }
+ }
+ }
+ else /*other bank*/
+ {
+ /* Page empty */
+ if (cmdIsRead)
+ {
+ if (current_row == active_row[current_bank])/*row is still active*/
+ { /*best case*/
+ lat = SD_BEST_T_READ_WRITE_OBANK;
+ best_case++;
+ other_bank_read_access_hit++;
+ obr_after_write_hit++;
+ }
+ else/*row is not active*/
+ {
+ if (corrected_overlap > 0 )/*overlapping*/
+ {
+ if(corrected_overlap >= (pre_lat+act_lat))/*best case*/
+ {
+ lat = SD_BEST_T_READ_WRITE_OBANK;
+ best_case++;
+ full_overlapping++;
+ }
+ else/*in between case*/
+ {
+ lat = SD_T_READ_WRITE_OBANK-corrected_overlap;
+ in_between_case++;
+ partial_overlapping++;
+ }
+ }
+ else/*worst case*/
+ {
+ lat = SD_T_READ_WRITE_OBANK;
+ worst_case++;
+ }
+ // DR keep track of time between misses
+ was_miss = 1;
+
+ other_bank_read_access_miss[0]++;
+ obr_after_write_miss++;
+ }
+ }
+ else/*write*/
+ {
+ if (current_row == active_row[current_bank])/*row is still active*/
+ { /*best case*/
+ lat = SD_BEST_T_WRITE_READ_OBANK;
+ best_case++;
+ other_bank_write_access_hit++;
+ obw_after_read_hit++;
+ }
+ else/*row is not active*/
+ {
+ if (corrected_overlap > 0 )/*overlapping*/
+ {
+ if (corrected_overlap >= (SD_T_WRITE_READ_OBANK-SD_BEST_T_WRITE_READ_OBANK))/*best case*/
+ {/*best case*/
+ lat = SD_BEST_T_WRITE_READ_OBANK;
+ best_case++;
+ full_overlapping++;
+ }
+ else/*in between case*/
+ {
+ lat = SD_T_WRITE_READ_OBANK-corrected_overlap;
+ in_between_case++;
+ partial_overlapping++;
+ }
+ }
+ else/*worst case*/
+ {
+ lat = SD_T_WRITE_READ_OBANK;
+ worst_case++;
+ }
+
+ // DR keep track of time between misses
+ was_miss = 1;
+
+ other_bank_write_access_miss[0]++;
+ obw_after_read_miss++;
+ }
+ }
+ }
+ }
+ /*fprintf(stderr,"%4d %4d ",lat,active_row[current_bank]);debugging*/
+
+ lat += chunks; /* burst length added*/
+ if(srow_flag == false)
+ timing_correction = cpu_ratio*(trc_lat - pre_lat - act_lat - cas_lat - 1);
+
+
+ /*fprintf(stderr,"%4d ",lat);debugging*/
+
+ active_row[current_bank]=current_row; /* open-page (hit) register */
+ lastCmdIsRead = cmdIsRead;
+ last_bank = current_bank;
+ last_row = current_row;
+
+ if (cpu_ratio < 1.0)
+ {
+ lat = (lat+((int)(1/cpu_ratio)-1))/(int)(1/cpu_ratio);
+ }
+ else
+ {
+ temp = (int)(lat*cpu_ratio);
+ lat = (lat*cpu_ratio == temp)?temp:(temp+1); /*round up*/
+ }
+
+ /*fprintf(stderr,"%4d \n",lat);debugging*/
+
+ if (overlap <= 0) /*memory interface is not busy*/
+ {
+ if (memctrlpipe_enable == true)
+ {
+ busy_until[current_bank]=curTick+lat+
+ timing_correction;
+ }
+ else
+ {
+ if (busy_until[current_bank] >= curTick)
+ {
+ busy_until[current_bank]+=(lat+
+ timing_correction);
+ total_arb_latency += (busy_until[current_bank]
+ - curTick - lat
+ - timing_correction);
+ lat=busy_until[current_bank] - curTick;
+ }
+ else busy_until[current_bank]=curTick+lat+
+ timing_correction;
+ }
+ }
+ else/*the memory request will be satisfied temp cycles after curTick*/
+ {
+ busy_until[current_bank] +=(lat+
+ timing_correction);
+ command_overlapping++;
+ lat+=overlap;
+ total_arb_latency += overlap;
+ }
+
+ // DR for power stats
+ if( was_miss ) {
+ cycles_between_misses[0] += (busy_until[current_bank] - time_last_miss);
+ time_last_miss = busy_until[current_bank];
+ }
+ // cout <<"cpu id = " << _cpu_num << "current_bank = " << current_bank << endl;
+ // if((_cpu_num < num_cpus) && (_cpu_num >= 0))
+ // bank_access_profile[_cpu_num][current_bank]++;
+
+ return lat;
+ }
+
+
+ /***********************************************************/
+ /******************** DRDRAM ***********************/
+ /***********************************************************/
+
+ else if ((mem_type == "DRDRAM") && (mem_actpolicy == "open"))/*DRDRAM*/ /*a closed bank has an activ_row number of DR_NUM_ROWS: highest +1*/
+ {
+ if ((memctrladdr_type != "interleaved"))/* i.e. mc_type is linear */
+ {
+ current_bank=physic_address/DR_BANK_SIZE;
+ temp=physic_address-current_bank*DR_BANK_SIZE;/*address in bank*/
+ current_row=temp/DR_ROW_SIZE;
+ current_device=current_bank/(DR_NUM_BANKS/DR_NUM_DEVS);
+ }
+
+ else/*mc_type interleaved*/
+ /* This memory controller maps the addresses differently
+ * depending on the row-size, every row is mapped to another
+ * bank. So the text segment uses half of every bank. The heap
+ * the next quarter of each bank and the stack the rest.
+ */
+
+ {
+ num_blocks = physic_address/DR_ROW_SIZE; /* row number */
+ current_bank=(num_blocks%DR_NUM_BANKS)*2; /*every 'second' bank will be used*/
+ /*banks above DR_NUM_BANKS are the uneven banks*/
+ current_bank = ((current_bank < DR_NUM_BANKS) ? current_bank:(current_bank - DR_NUM_BANKS+1));
+ current_row=num_blocks/DR_NUM_BANKS;
+ current_device=current_bank/(DR_NUM_BANKS/DR_NUM_DEVS);
+ }
+ if (abs(current_bank-last_bank)==1)/*access to an adjacent bank*/
+ {
+ if (!((current_bank%DR_BANK_SAMP == (DR_BANK_SAMP-1))&&(last_bank%DR_BANK_SAMP == 0))/*not 15/16 (current/last)*/
+ &&(!((last_bank%DR_BANK_SAMP == (DR_BANK_SAMP-1))&&(current_bank%DR_BANK_SAMP == 0))))/*not 16/15(current/last)*/
+ {
+ adjacent_access++;
+ adjacent=1;/*an adjacent bank is accessed*/
+ if (cmdIsRead)
+ adjacent_read++;
+ else
+ adjacent_write++;
+ }
+ }
+ precharge=0;/*at this moment no bank needs to be precharged*/
+ if (active_row[current_bank] == DR_NUM_ROWS)/*bank is precharged*/
+ {
+ if (prechargeBanksAround(current_bank)> 0)/*a bank next to the current is activated*/
+ {
+ if ((adjacent==1)&&(precharge==1))
+ {
+ /*since adjacent banks share SAMPs, this access would be the same as (in terms of latency)
+ *an access to another row in the same bank if only one adjacent bank was active*/
+ last_bank = current_bank;
+ last_row = current_row+1;
+ precharge=0;/*set to 0 for next memory access*/
+ }
+ }
+ }
+ if (mem_access_details == true)
+ {
+ //fprintf(mem_accessfd," %09u %4d %3d %15d\n",physic_address,current_row,current_bank,(int)adjacent_access);
+ }
+ else
+ {
+ if (mem_access_output!=NULL)
+ {
+ //fprintf(mem_accessfd,"\n");
+ }
+ }
+ total_access++;
+
+ if (memctrlpipe_enable == true)
+ {
+ overlap=(int)(busy_until[current_bank] - curTick);
+ }
+ else overlap=0;
+
+ if (cpu_ratio < 1.0)
+ {
+ corrected_overlap = overlap*((int)(1/cpu_ratio)); /* floor */
+ }
+ else
+ {
+ corrected_overlap = (int) (overlap/cpu_ratio);
+ }
+
+ /*fprintf(stderr,"%10.0f %10.0f %6d %6d %2d %2d ",(double)busy_until, (double)curTick, overlap, corrected_overlap,precharge,adjacent);debugging*/
+
+ if (cmdIsRead == lastCmdIsRead)/*same command*/
+ {
+ if (current_bank == last_bank)/*same bank*/
+ {
+ if (current_row == last_row)/*same row*/
+ {
+ if (cmdIsRead)
+ {
+ if (corrected_overlap > 0)/*overlapping*/
+ {
+ /*best case*/
+ if (corrected_overlap >= DR_T_READ_READ_SROW)
+ {
+ lat=DR_BEST_T_READ_READ_SROW;
+ srow_flag = true;
+ best_case++;
+ full_overlapping++;
+ }
+ else/*in between case*/
+ {
+ lat = DR_T_READ_READ_SROW-corrected_overlap;
+ srow_flag = true;
+ in_between_case++;
+ partial_overlapping++;
+ }
+ }
+ else
+ {
+ /*worst case*/
+ lat = DR_T_READ_READ_SROW;
+ srow_flag = true;
+ worst_case++;
+ }
+ same_row_read_access++;
+ srr_after_read++;
+ }
+ else/*write, always retire the previous data*/
+ {
+ if (corrected_overlap > 0)/*overlapping*/
+ {
+ /*best case*/
+ if (corrected_overlap >= DR_T_OWR)
+ {
+ lat=DR_BEST_T_WRITE_WRITE_SROW;
+ srow_flag = true;
+ best_case++;
+ full_overlapping++;
+ }
+ else/*in between case*/
+ {
+ lat = DR_T_WRITE_WRITE_SROW-corrected_overlap;
+ srow_flag = true;
+ in_between_case++;
+ partial_overlapping++;
+ }
+ }
+ else
+ {
+ /*worst case*/
+ lat = DR_T_WRITE_WRITE_SROW;
+ srow_flag = true;
+ worst_case++;
+ }
+ same_row_write_access++;
+ srw_after_write++;
+ }
+ }
+ else /*other row in same bank*/
+ {
+ if (cmdIsRead)
+ {
+ if (corrected_overlap > 0)/*overlapping*/
+ {
+ if (corrected_overlap >= DR_T_HELP)/*best case*/
+ {
+ lat = DR_BEST_T_READ_READ_SBANK;
+ best_case++;
+ full_overlapping++;
+ }
+ else/*in between case*/
+ {
+ lat = DR_T_READ_READ_SBANK-corrected_overlap;
+ in_between_case++;
+ partial_overlapping++;
+ }
+ }
+ else/*worst case*/
+ {
+ lat = DR_T_READ_READ_SBANK;
+ worst_case++;
+ }
+ same_bank_read_access++;
+ sbr_after_read++;
+ }
+ else/*write*/
+ {
+ if (corrected_overlap > 0)/*overlapping*/
+ {
+ if (corrected_overlap >= DR_T_OWR)/*best case*/
+ {
+ lat = DR_BEST_T_WRITE_WRITE_SBANK;
+ best_case++;
+ full_overlapping++;
+ }
+ else/*in between case*/
+ {
+ lat = DR_T_WRITE_WRITE_SBANK-corrected_overlap;
+ in_between_case++;
+ partial_overlapping++;
+ }
+ }
+ else/*worst case*/
+ {
+ lat = DR_T_WRITE_WRITE_SBANK;
+ worst_case++;
+ }
+ same_bank_write_access++;
+ sbw_after_write++;
+ }
+ }
+ }
+ else /*other bank*/
+ {
+ if (cmdIsRead)
+ {
+ if (current_row == active_row[current_bank])/*row is still active*/
+ {
+ if (corrected_overlap > 0 )/*overlapping*/
+ {
+ if(corrected_overlap >= (DR_T_CAC+DR_T_PACKET))/*best case*/
+ {
+ lat = DR_BEST_T_READ_READ_OBANK;
+ best_case++;
+ full_overlapping++;
+ }
+ else/*in between case*/
+ {
+ lat = DR_T_CAC+DR_T_PACKET-corrected_overlap;
+ in_between_case++;
+ partial_overlapping++;
+ }
+ }
+ else/*in between case*/
+ {
+ lat = DR_T_CAC+DR_T_PACKET;
+ in_between_case++;
+ }
+ other_bank_read_access_hit++;
+ obr_after_read_hit++;
+ }
+ else/*row is not active or bank is precharged/not active*/
+ {
+ if (active_row[current_bank]!=DR_NUM_ROWS)/*row is not active, but bank is active*/
+ {
+ if (corrected_overlap > 0 )/*overlapping*/
+ {
+ if(corrected_overlap >= (DR_T_RP+DR_T_RCD+DR_T_CAC+DR_T_PACKET))/*best case*/
+ {
+ lat = DR_BEST_T_READ_READ_OBANK;
+ best_case++;
+ full_overlapping++;
+ }
+ else/*in between case*/
+ {
+ lat = DR_T_RP+DR_T_RCD+DR_T_CAC+DR_T_PACKET-corrected_overlap;
+ in_between_case++;
+ partial_overlapping++;
+ }
+ }
+ else/*worst case*/
+ {
+ lat = DR_T_RP+DR_T_RCD+DR_T_CAC+DR_T_PACKET;
+ in_between_case++;
+ }
+ }
+ else/*current_row == DR_NUM_ROWS:precharged or inactive*/
+ {
+ if(precharge == 0)/*no adjacent bank is active*/
+ {
+ if (corrected_overlap > 0 )/*overlapping*/
+ {
+ if(corrected_overlap >= (DR_T_RCD+DR_T_CAC+DR_T_PACKET))/*best case*/
+ {
+ lat = DR_BEST_T_READ_READ_OBANK;
+ best_case++;
+ full_overlapping++;
+ }
+ else/*in between case*/
+ {
+ lat = DR_T_RCD+DR_T_CAC+DR_T_PACKET-corrected_overlap;
+ in_between_case++;
+ partial_overlapping++;
+ }
+ }
+ else/*worst case*/
+ {
+ lat = DR_T_RCD+DR_T_CAC+DR_T_PACKET;
+ in_between_case++;
+ }
+ }
+ else/*one ore two adjacent banks are active*/
+ {
+ if (precharge == 1)
+ {
+ if (corrected_overlap > 0 )/*overlapping*/
+ {
+ if(corrected_overlap >= (DR_T_RP+DR_T_RCD+DR_T_CAC+DR_T_PACKET))/*best case*/
+ {
+ lat = DR_BEST_T_READ_READ_OBANK;
+ best_case++;
+ full_overlapping++;
+ }
+ else/*in between case*/
+ {
+ lat = (DR_T_RP+DR_T_RCD+DR_T_CAC+DR_T_PACKET)-corrected_overlap;
+ in_between_case++;
+ partial_overlapping++;
+ }
+ }
+ else/*worst case*/
+ {
+ lat = (DR_T_RP+DR_T_RCD+DR_T_CAC+DR_T_PACKET);
+ in_between_case++;
+ }
+ }
+ else /*precharge ==2: two rows must be precharged*/
+ {
+ if (adjacent == 1)/*these banks are adjacent*/
+ {
+ if (corrected_overlap > 0 )/*overlapping*/
+ {
+ if(corrected_overlap >= DR_T_PP+2*DR_T_PACKET-DR_T_RDP+DR_T_CAC)/*best case*/
+ {
+ lat = DR_T_RDP+DR_T_RP+DR_T_RCD-DR_T_PACKET;
+ in_between_case++;
+ full_overlapping++;
+ }
+ else/*in between case*/
+ {
+ lat = DR_T_READ_READ_OBANK-corrected_overlap;
+ in_between_case++;
+ partial_overlapping++;
+ }
+ }
+ else/*worst case*/
+ {
+ lat = DR_T_READ_READ_OBANK;
+ worst_case++;
+ }
+ }
+ else/*adjacent == 0: two not adjacent banks need to be precharged*/
+ {
+ if (corrected_overlap > 0 )/*overlapping*/
+ {
+ if(corrected_overlap >= DR_T_READ_READ_OBANK)/*best case*/
+ {
+ lat = DR_BEST_T_READ_READ_OBANK;
+ best_case++;
+ full_overlapping++;
+ }
+ else/*in between case*/
+ {
+ lat = DR_T_READ_READ_OBANK-corrected_overlap;
+ in_between_case++;
+ partial_overlapping++;
+ }
+ }
+ else/*worst case*/
+ {
+ lat = DR_T_READ_READ_OBANK;
+ worst_case++;
+ }
+ }
+ }
+ }
+ }
+ other_bank_read_access_miss[0]++;
+ obr_after_read_miss++;
+ }
+ }
+ else/*write*/
+ {
+ if (current_row == active_row[current_bank])/*row is still active*/
+ {
+ if (corrected_overlap > 0 )/*overlapping*/
+ {
+ if(corrected_overlap >= (DR_T_CWD+DR_T_PACKET))/*best case*/
+ {
+ lat = DR_BEST_T_WRITE_WRITE_OBANK;
+ best_case++;
+ full_overlapping++;
+ }
+ else/*in between case*/
+ {
+ lat = DR_T_CWD+DR_T_PACKET-corrected_overlap;
+ in_between_case++;
+ partial_overlapping++;
+ }
+ }
+ else/*worst case*/
+ {
+ lat = DR_T_CWD+DR_T_PACKET;
+ in_between_case++;
+ }
+ other_bank_write_access_hit++;
+ obw_after_write_hit++;
+ }
+ else/*row is not active or bank is precharged/not active*/
+ {
+ if (active_row[current_bank] != DR_NUM_ROWS)/*row is not active,but bank is active*/
+ {
+ if (corrected_overlap > 0 )/*overlapping*/
+ {
+ if(corrected_overlap >= (DR_T_RP+DR_T_RCD+DR_T_CWD+DR_T_PACKET))/*best case*/
+ {
+ lat = DR_BEST_T_WRITE_WRITE_OBANK;
+ best_case++;
+ full_overlapping++;
+ }
+ else/*in between case*/
+ {
+ lat = DR_T_RP+DR_T_RCD+DR_T_CWD+DR_T_PACKET-corrected_overlap;
+ in_between_case++;
+ partial_overlapping++;
+ }
+ }
+ else/*worst case*/
+ {
+ lat = DR_T_RP+DR_T_RCD+DR_T_CWD+DR_T_PACKET;
+ in_between_case++;
+ }
+ }
+ else/*current_row == DR_NUM_ROWS:precharged or inactive*/
+ {
+ if(precharge == 0)/*no adjacent bank is active*/
+ {
+ if (corrected_overlap > 0 )/*overlapping*/
+ {
+ if(corrected_overlap >= (DR_T_RCD+DR_T_CWD+DR_T_PACKET))/*best case*/
+ {
+ lat = DR_BEST_T_WRITE_WRITE_OBANK;
+ best_case++;
+ full_overlapping++;
+ }
+ else/*in between case*/
+ {
+ lat = DR_T_RCD+DR_T_CWD+DR_T_PACKET-corrected_overlap;
+ in_between_case++;
+ partial_overlapping++;
+ }
+ }
+ else/*worst case*/
+ {
+ lat = DR_T_RCD+DR_T_CWD+DR_T_PACKET;
+ in_between_case++;
+ }
+ }
+ else/*one ore two adjacent banks are active*/
+ {
+ if (precharge == 1)/*last_bank is no adjacent*/
+ {
+ if (corrected_overlap > 0 )/*overlapping*/
+ {
+ if(corrected_overlap >= (DR_T_RP+DR_T_RCD+DR_T_CWD+DR_T_PACKET))/*best case*/
+ {
+ lat = DR_BEST_T_WRITE_WRITE_OBANK;
+ best_case++;
+ full_overlapping++;
+ }
+ else/*in between case*/
+ {
+ lat = (DR_T_RP+DR_T_RCD+DR_T_CWD+DR_T_PACKET)-corrected_overlap;
+ in_between_case++;
+ partial_overlapping++;
+ }
+ }
+ else/*worst case*/
+ {
+ lat = (DR_T_RP+DR_T_RCD+DR_T_CWD+DR_T_PACKET);
+ in_between_case++;
+ }
+ }
+ else /*precharge ==2: two rows have to be precharged*/
+ {
+ if (adjacent == 1)/*these banks are adjacent*/
+ {
+ if (corrected_overlap > 0 )/*overlapping*/
+ {
+ if(corrected_overlap >= DR_T_OWR+DR_T_PP)/*best case*/
+ {
+ lat = DR_T_WRITE_WRITE_OBANK-DR_T_OWR-DR_T_PP;
+ in_between_case++;
+ full_overlapping++;
+ }
+ else/*in between case*/
+ {
+ lat = DR_T_WRITE_WRITE_OBANK-corrected_overlap;
+ in_between_case++;
+ partial_overlapping++;
+ }
+ }
+ else/*worst case*/
+ {
+ lat = DR_T_WRITE_WRITE_OBANK;
+ worst_case++;
+ }
+ }
+ else/*adjacent == 0: two not adjacent banks need to be precharged*/
+ {
+ if (corrected_overlap > 0 )/*overlapping*/
+ {
+ if(corrected_overlap >= DR_T_WRITE_WRITE_OBANK)/*best case*/
+ {
+ lat = DR_BEST_T_WRITE_WRITE_OBANK;
+ best_case++;
+ full_overlapping++;
+ }
+ else/*in between case*/
+ {
+ lat = DR_T_WRITE_WRITE_OBANK-corrected_overlap;
+ in_between_case++;
+ partial_overlapping++;
+ }
+ }
+ else/*worst case*/
+ {
+ lat = DR_T_WRITE_WRITE_OBANK;
+ worst_case++;
+ }
+ }
+ }
+ }
+ }
+ other_bank_write_access_miss[0]++;
+ obw_after_write_miss++;
+ }
+ }
+ }
+ }
+ else /*lastCmdIsRead != cmdIsRead*/
+ {
+ if (current_bank == last_bank)/*same bank*/
+ {
+ if (current_row == last_row)/*same row*/
+ {
+ if (cmdIsRead)
+ {
+ if (corrected_overlap > 0)/*overlapping*/
+ {
+ /*best case*/
+ if (corrected_overlap >= DR_T_OWR)
+ {
+ lat=DR_BEST_T_READ_WRITE_SROW;
+ srow_flag = true;
+ best_case++;
+ full_overlapping++;
+ }
+ else/*in between case*/
+ {
+ lat = DR_T_READ_WRITE_SROW-corrected_overlap;
+ srow_flag = true;
+ in_between_case++;
+ partial_overlapping++;
+ }
+ }
+ else
+ {
+ /*worst case*/
+ lat = DR_T_READ_WRITE_SROW;
+ srow_flag = true;
+ worst_case++;
+ }
+ same_row_read_access++;
+ srr_after_write++;
+ }
+ else/*write*/
+ {
+ if (corrected_overlap > 0)/*overlapping*/
+ {
+ /*best case*/
+ if (corrected_overlap >= DR_T_WRITE_READ_SROW)
+ {
+ lat=DR_BEST_T_WRITE_READ_SROW;
+ srow_flag = true;
+ best_case++;
+ full_overlapping++;
+ }
+ else/*in between case*/
+ {
+ lat = DR_T_WRITE_READ_SROW-corrected_overlap;
+ srow_flag = true;
+ in_between_case++;
+ partial_overlapping++;
+ }
+ }
+ else
+ {
+ /*worst case*/
+ lat = DR_T_WRITE_READ_SROW;
+ srow_flag = true;
+ worst_case++;
+ }
+ same_row_write_access++;
+ srw_after_read++;
+ }
+ }
+ else /*other row in same bank*/
+ {
+ if (cmdIsRead)
+ {
+ if (corrected_overlap > 0 )/*overlapping*/
+ {
+ if (corrected_overlap >= DR_T_OWR)/*best case*/
+ {
+ lat = DR_BEST_T_READ_WRITE_SBANK;
+ best_case++;
+ full_overlapping++;
+ }
+ else/*in between case*/
+ {
+ lat = DR_T_READ_WRITE_SBANK-corrected_overlap;
+ in_between_case++;
+ partial_overlapping++;
+ }
+ }
+ else/*worst case*/
+ {
+ lat = DR_T_READ_WRITE_SBANK;
+ worst_case++;
+ }
+ same_bank_read_access++;
+ sbr_after_write++;
+ }
+ else/*write*/
+ {
+ if (corrected_overlap > 0 )/*overlapping*/
+ {
+ if (corrected_overlap >= DR_T_HELP)/*best case*/
+ {
+ lat = DR_BEST_T_WRITE_READ_SBANK;
+ best_case++;
+ full_overlapping++;
+ }
+ else/*in between case*/
+ {
+ lat = DR_T_WRITE_READ_SBANK-corrected_overlap;
+ in_between_case++;
+ partial_overlapping++;
+ }
+ }
+ else/*worst case*/
+ {
+ lat = DR_T_WRITE_READ_SBANK;
+ worst_case++;
+ }
+ same_bank_write_access++;
+ sbw_after_read++;
+ }
+ }
+ }
+ else /*other bank*/
+ {
+ if (cmdIsRead)
+ {
+ if (current_row == active_row[current_bank])/*row is still active*/
+ {
+ if (corrected_overlap > 0 )/*overlapping*/
+ {
+ if(last_dev != current_device)
+ {
+ if(corrected_overlap >= DR_T_CWD+DR_T_PACKET)/*best case*/
+ {
+ lat = DR_BEST_T_READ_WRITE_ODEV;
+ best_case++;
+ full_overlapping++;
+ }
+ else/*in between case*/
+ {
+ lat = DR_T_CAC+DR_T_PACKET-corrected_overlap;
+ in_between_case++;
+ partial_overlapping++;
+ }
+ }
+ else /* same device */
+ {
+ if(corrected_overlap >= DR_T_OWR)/*best case*/
+ {
+ lat = DR_BEST_T_READ_WRITE_OBANK;
+ best_case++;
+ full_overlapping++;
+ }
+ else/*in between case*/
+ {
+ lat = DR_T_CAC+DR_T_PACKET-corrected_overlap;
+ in_between_case++;
+ partial_overlapping++;
+ }
+ }
+ }
+ else/*in between case, no overlap*/
+ {
+ lat = DR_T_CAC+DR_T_PACKET;
+ in_between_case++;
+ }
+ other_bank_read_access_hit++;
+ obr_after_write_hit++;
+ }
+
+ else/*row is not active or bank is precharged/not active*/
+ {
+ if (active_row[current_bank] != DR_NUM_ROWS)/*row is not active,but bank is active*/
+ {
+ if (corrected_overlap > 0 )/*overlapping*/
+ {
+ if (last_dev != current_device)
+ {
+ if(corrected_overlap >= (DR_T_RP+DR_T_RCD+DR_T_CWD+DR_T_PACKET))/*best case*/
+ {
+ lat = DR_BEST_T_READ_WRITE_ODEV;
+ best_case++;
+ full_overlapping++;
+ }
+ else/*in between case*/
+ {
+ lat = DR_T_RP+DR_T_RCD+DR_T_CAC+DR_T_PACKET-corrected_overlap;
+ in_between_case++;
+ partial_overlapping++;
+ }
+ }
+ else /* same device */
+ {
+ if(corrected_overlap >= (DR_T_RP+DR_T_RCD+DR_T_OWR))/*best case*/
+ {
+ lat = DR_BEST_T_READ_WRITE_OBANK;
+ best_case++;
+ full_overlapping++;
+ }
+ else/*in between case*/
+ {
+ lat = DR_T_RP+DR_T_RCD+DR_T_CAC+DR_T_PACKET-corrected_overlap;
+ in_between_case++;
+ partial_overlapping++;
+ }
+ }
+ }
+ else/*worst case*/
+ {
+ lat = DR_T_RP+DR_T_RCD+DR_T_CAC+DR_T_PACKET;
+ in_between_case++;
+ }
+ }
+ else/*current_row == DR_NUM_ROWS:precharged or inactive*/
+ {
+ if(precharge == 0)/*no adjacent bank is active*/
+ {
+ if (corrected_overlap > 0 )/*overlapping*/
+ {
+ if(last_dev != current_device)
+ {
+ if(corrected_overlap >= (DR_T_RCD+DR_T_CWD+DR_T_PACKET))/*best case*/
+ {
+ lat = DR_BEST_T_READ_WRITE_ODEV;
+ best_case++;
+ full_overlapping++;
+ }
+ else/*in between case*/
+ {
+ lat = DR_T_RCD+DR_T_CAC+DR_T_PACKET-corrected_overlap;
+ in_between_case++;
+ partial_overlapping++;
+ }
+ }
+ else /* same device */
+ {
+ if(corrected_overlap >= (DR_T_RCD+DR_T_OWR))/*best case*/
+ {
+ lat = DR_BEST_T_READ_WRITE_OBANK;
+ best_case++;
+ full_overlapping++;
+ }
+ else/*in between case*/
+ {
+ lat = DR_T_RCD+DR_T_CAC+DR_T_PACKET-corrected_overlap;
+ in_between_case++;
+ partial_overlapping++;
+ }
+ }
+ }
+ else/*worst case*/
+ {
+ lat = DR_T_RCD+DR_T_CAC+DR_T_PACKET;
+ in_between_case++;
+ }
+ }
+ else/*one or two adjacent banks are active*/
+ {
+ if (precharge == 1)/*an adjacent bank (!=last_bank) needs to be precharged*/
+ {
+ if (corrected_overlap > 0 )/*overlapping*/
+ {
+ if(last_dev != current_device)
+ {
+ if(corrected_overlap >= (DR_T_RP+DR_T_RCD+DR_T_CWD+DR_T_PACKET))/*best case*/
+ {
+ lat = DR_BEST_T_READ_WRITE_ODEV;
+ best_case++;
+ full_overlapping++;
+ }
+ else/*in between case*/
+ {
+ lat = (DR_T_RP+DR_T_RCD+DR_T_CAC+DR_T_PACKET)-corrected_overlap;
+ in_between_case++;
+ partial_overlapping++;
+ }
+ }
+ else /* same device */
+ {
+ if(corrected_overlap >= (DR_T_RP+DR_T_RCD+DR_T_OWR))/*best case*/
+ {
+ lat = DR_BEST_T_READ_WRITE_OBANK;
+ best_case++;
+ full_overlapping++;
+ }
+ else/*in between case*/
+ {
+ lat = (DR_T_RP+DR_T_RCD+DR_T_CAC+DR_T_PACKET)-corrected_overlap;
+ in_between_case++;
+ partial_overlapping++;
+ }
+ }
+ }
+ else/*worst case*/
+ {
+ lat = (DR_T_RP+DR_T_RCD+DR_T_CAC+DR_T_PACKET);
+ in_between_case++;
+ }
+ }
+ else /*precharge ==2: two rows have to be precharged*/
+ {
+ if (adjacent == 1) /* the banks are adjacent */
+ {
+ if (corrected_overlap > 0 )/*overlapping*/
+ {
+ if(corrected_overlap >= DR_T_OWR + DR_T_PP)/*best case*/
+ {
+ lat = DR_T_READ_WRITE_OBANK-DR_T_OWR - DR_T_PP;
+ in_between_case++;
+ full_overlapping++;
+ }
+ else/*in between case*/
+ {
+ lat = DR_T_READ_WRITE_OBANK-corrected_overlap;
+ in_between_case++;
+ partial_overlapping++;
+ }
+ }
+ else/*worst case*/
+ {
+ lat = DR_T_READ_WRITE_OBANK;
+ worst_case++;
+ }
+ }
+ else/*adjacent == 0: two not adjacent banks need to be precharged*/
+ {
+ if (corrected_overlap > 0 )/*overlapping*/
+ {
+ if (last_dev != current_device)
+ {
+ if(corrected_overlap >= (DR_T_PP+DR_T_RP+DR_T_RCD+DR_T_CWD+DR_T_PACKET))/*best case*/
+ {
+ lat = DR_BEST_T_READ_WRITE_ODEV;
+ best_case++;
+ full_overlapping++;
+ }
+ else/*in between case*/
+ {
+ lat = DR_T_READ_WRITE_OBANK-corrected_overlap;
+ in_between_case++;
+ partial_overlapping++;
+ }
+ }
+ else /* same device */
+ {
+ if(corrected_overlap >= (DR_T_PP+DR_T_RP+DR_T_RCD+DR_T_OWR))/*best case*/
+ {
+ lat = DR_BEST_T_READ_WRITE_OBANK;
+ best_case++;
+ full_overlapping++;
+ }
+ else/*in between case*/
+ {
+ lat = DR_T_READ_WRITE_OBANK-corrected_overlap;
+ in_between_case++;
+ partial_overlapping++;
+ }
+ }
+ }
+ else/*worst case*/
+ {
+ lat = DR_T_READ_WRITE_OBANK;
+ worst_case++;
+ }
+ }
+ }
+ }
+ }
+ other_bank_read_access_miss[0]++;
+ obr_after_write_miss++;
+ }
+ }
+ else/*write*/
+ {
+ if (current_row == active_row[current_bank])/*row is still active*/
+ {
+ if (corrected_overlap > 0 )/*overlapping*/
+ {
+ if(corrected_overlap >= DR_T_CWD+DR_T_PACKET)/*best case*/
+ {
+ lat = DR_BEST_T_WRITE_READ_OBANK;
+ best_case++;
+ full_overlapping++;
+ }
+ else/*in between case*/
+ {
+ lat = DR_T_CWD+DR_T_PACKET-corrected_overlap;
+ in_between_case++;
+ partial_overlapping++;
+ }
+ }
+ else/*in between case*/
+ {
+ lat = DR_T_CWD+DR_T_PACKET;
+ in_between_case++;
+ }
+ other_bank_write_access_hit++;
+ obw_after_read_hit++;
+ }
+ else/*row is not active or bank is precharged/not active*/
+ {
+ if (active_row[current_bank] != DR_NUM_ROWS)/*row is not active,but bank is active*/
+ {
+ if (corrected_overlap > 0 )/*overlapping*/
+ {
+ if(corrected_overlap >= (DR_T_RP+DR_T_RCD+DR_T_CWD+DR_T_PACKET))/*best case*/
+ {
+ lat = DR_BEST_T_WRITE_READ_OBANK;
+ best_case++;
+ full_overlapping++;
+ }
+ else/*in between case*/
+ {
+ lat = DR_T_RP+DR_T_RCD+DR_T_CWD+DR_T_PACKET-corrected_overlap;
+ in_between_case++;
+ partial_overlapping++;
+ }
+ }
+ else/*worst case*/
+ {
+ lat = DR_T_RP+DR_T_RCD+DR_T_CWD+DR_T_PACKET;
+ in_between_case++;
+ }
+ }
+ else/*current_row == DR_NUM_ROWS:precharged or inactive*/
+ {
+ if(precharge == 0)/*no adjacent bank is active*/
+ {
+ if (corrected_overlap > 0 )/*overlapping*/
+ {
+ if(corrected_overlap >= (DR_T_RCD+DR_T_CWD+DR_T_PACKET))/*best case*/
+ {
+ lat = DR_BEST_T_WRITE_READ_OBANK;
+ best_case++;
+ full_overlapping++;
+ }
+ else/*in between case*/
+ {
+ lat = DR_T_RCD+DR_T_CWD+DR_T_PACKET-corrected_overlap;
+ in_between_case++;
+ partial_overlapping++;
+ }
+ }
+ else/*worst case*/
+ {
+ lat = DR_T_RCD+DR_T_CWD+DR_T_PACKET;
+ in_between_case++;
+ }
+ }
+ else/*one or two adjacent banks are active*/
+ {
+ if (precharge == 1)/*an adjacent bank (!=last_bank) needs to be precharged first*/
+ {
+ if (corrected_overlap > 0 )/*overlapping*/
+ {
+ if(corrected_overlap >= (DR_T_RP+DR_T_RCD+DR_T_CWD+DR_T_PACKET))/*best case*/
+ {
+ lat = DR_BEST_T_WRITE_READ_OBANK;
+ best_case++;
+ full_overlapping++;
+ }
+ else/*in between case*/
+ {
+ lat = (DR_T_RP+DR_T_RCD+DR_T_CWD+DR_T_PACKET)-corrected_overlap;
+ in_between_case++;
+ partial_overlapping++;
+ }
+ }
+ else/*worst case*/
+ {
+ lat = (DR_T_RP+DR_T_RCD+DR_T_CWD+DR_T_PACKET);
+ in_between_case++;
+ }
+ }
+ else /*precharge ==2: two rows have to be precharged*/
+ {
+ if (adjacent == 1)/*these banks are adjacent*/
+ {
+ if (corrected_overlap > 0 )/*overlapping*/
+ {
+ if(corrected_overlap >= DR_T_PP-DR_T_RDP+2*DR_T_PACKET+DR_T_CAC)/*best case*/
+ {
+ lat = DR_T_WRITE_READ_OBANK-(DR_T_PP-DR_T_RDP+2*DR_T_PACKET+DR_T_CAC);
+ in_between_case++;
+ full_overlapping++;
+ }
+ else/*in between case*/
+ {
+ lat = DR_T_WRITE_READ_OBANK-corrected_overlap;
+ in_between_case++;
+ partial_overlapping++;
+ }
+ }
+ else/*worst case*/
+ {
+ lat = DR_T_WRITE_READ_OBANK;
+ worst_case++;
+ }
+ }
+ else/*adjacent == 0: two not adjacent banks need to be precharged*/
+ {
+ if (corrected_overlap > 0 )/*overlapping*/
+ {
+ if(corrected_overlap >= DR_T_WRITE_READ_OBANK)/*best case*/
+ {
+ lat = DR_BEST_T_WRITE_READ_OBANK;
+ best_case++;
+ full_overlapping++;
+ }
+ else/*in between case*/
+ {
+ lat = DR_T_WRITE_READ_OBANK-corrected_overlap;
+ in_between_case++;
+ partial_overlapping++;
+ }
+ }
+ else/*worst case*/
+ {
+ lat = DR_T_WRITE_READ_OBANK;
+ worst_case++;
+ }
+ }
+ }
+ }
+ }
+ other_bank_write_access_miss[0]++;
+ obw_after_read_miss++;
+ }
+ }
+ }
+ }
+ /*fprintf(stderr,"%4d %4d ",lat,active_row[current_bank]);debugging*/
+
+ lat += chunks * DR_T_PACKET; /*every 128 bit need DR_NUM_CYCLES*/
+
+ /*fprintf(stderr,"%4d ",lat);debugging*/
+
+ if (cpu_ratio < 1.0)
+ {
+ lat = (lat+((int)(1/cpu_ratio)-1))/(int)(1/cpu_ratio);
+ }
+ else
+ {
+ temp = (int)(lat*cpu_ratio);
+ lat = (lat*cpu_ratio == temp)?temp:(temp+1); /*round up*/
+ }
+
+ active_row[current_bank]=current_row;
+ lastCmdIsRead = cmdIsRead;
+ last_bank=current_bank;
+ last_row = current_row;
+ last_dev = current_device;
+
+ /*fprintf(stderr,"%4d \n",lat);debugging*/
+
+ if (overlap <= 0) /*memory interface is not busy*/
+ {
+ if (memctrlpipe_enable == true)
+ {
+ busy_until[current_bank] =curTick+lat;
+ }
+ else
+ {
+ if (busy_until[current_bank] >= curTick)
+ {
+ busy_until[current_bank] +=lat;
+ lat=busy_until[current_bank] - curTick;
+ }
+ else busy_until[current_bank] = curTick+lat;
+ }
+ }
+ else/*the memory request will be satisfied temp cycles after curTick*/
+ {
+ busy_until[current_bank] +=lat;
+ command_overlapping++;
+ lat+=overlap;
+ }
+
+ // if((_cpu_num < num_cpus) && (_cpu_num >= 0))
+ // cout <<"cpu id = " << _cpu_num << "current_bank = " << current_bank << endl;
+ // bank_access_profile[_cpu_num][current_bank]++;
+ return lat;
+ }
+
+ /******************************************************************/
+
+ else if ((mem_type== "SDRAM") && (mem_actpolicy == "closed") && (memctrlpipe_enable == true))
+ /* SDRAM closed-page with overlap, 2/00 MG */
+ {
+ if ((memctrladdr_type != "interleaved"))/* i.e. mc_type is linear*/
+ {
+ // current_bank=physic_address/SD_BANK_SIZE;
+ current_bank=physic_address/bank_size;
+ }
+ else/*mc_type interleaved*/
+ /* This memory management unit maps the addresses different
+ * depending on the row_size, every row is mapped to another
+ * bank. So the text segment uses half of every bank. The heap
+ * the next quarter of each bank and the stack the rest.
+ */
+ {
+ num_blocks = physic_address/SD_ROW_SIZE; /* row number */
+ // current_bank=num_blocks%SD_NUM_BANKS;
+ current_bank=num_blocks%num_banks;
+ }
+
+ if (mem_access_details == true)
+ {
+ //fprintf(mem_accessfd," %09u %3d\n",physic_address,current_bank);
+ }
+ else
+ {
+ if (mem_access_output!=NULL)
+ {
+ //fprintf(mem_accessfd,"\n");
+ }
+ }
+ total_access++;
+
+ overlap=(int)(busy_until[current_bank] - curTick);
+
+ if (current_bank == last_bank)/*same bank*/
+ {
+ if ((lastCmdIsRead == cmdIsRead) && (cmdIsRead))/* RAR */
+ {
+ lat = act_lat + cas_lat;
+ }
+ else if ((lastCmdIsRead == cmdIsRead) && (!cmdIsRead)) /* WAW */
+ {
+ lat = act_lat;
+ }
+ else if ((lastCmdIsRead != cmdIsRead) && (cmdIsRead)) /* RAW */
+ {
+ lat = act_lat + cas_lat;
+ }
+ else /* WAR */
+ {
+ lat = act_lat;
+ }
+ }
+ else /* other bank */
+ {
+ if (cpu_ratio < 1.0)
+ {
+ corrected_overlap = overlap*((int)(1/cpu_ratio)); /* floor */
+ }
+ else
+ {
+ corrected_overlap = (int) (overlap/cpu_ratio);
+ }
+
+ if ((lastCmdIsRead == cmdIsRead) && (cmdIsRead))/* RAR */
+ {
+ if (corrected_overlap > act_lat + cas_lat)
+ {
+ lat = 0;
+ best_case++;
+ full_overlapping++;
+ }
+ else if (corrected_overlap > 0)
+ {
+ lat = act_lat + cas_lat - corrected_overlap;
+ in_between_case++;
+ partial_overlapping++;
+ }
+ else
+ {
+ lat = act_lat + cas_lat;
+ worst_case++;
+ }
+ }
+ else if ((lastCmdIsRead == cmdIsRead) && (!cmdIsRead)) /* WAW */
+ {
+ if (corrected_overlap > act_lat + pre_lat + (dpl_lat-1))
+ {
+ lat = - pre_lat - dpl_lat +1;
+ best_case++;
+ full_overlapping++;
+ }
+ else if (corrected_overlap > 0)
+ {
+ lat = act_lat - corrected_overlap;
+ in_between_case++;
+ partial_overlapping++;
+ }
+ else
+ {
+ lat = act_lat;
+ worst_case++;
+ }
+ }
+ else if ((lastCmdIsRead != cmdIsRead) && (cmdIsRead)) /* RAW */
+ {
+ if (corrected_overlap > cas_lat + pre_lat + dpl_lat - 1 )
+ {
+ lat = act_lat - (pre_lat + dpl_lat - 1);
+ best_case++;
+ partial_overlapping++;
+ }
+ else if (corrected_overlap > 0)
+ {
+ lat = act_lat + cas_lat - corrected_overlap;
+ in_between_case++;
+ partial_overlapping++;
+ }
+ else
+ {
+ lat = act_lat + cas_lat;
+ worst_case++;
+ }
+ }
+ else /* WAR */
+ {
+ if (corrected_overlap > act_lat - (dpl_lat-1))
+ {
+ lat = dpl_lat-1;
+ best_case++;
+ partial_overlapping++;
+ }
+ else if (corrected_overlap > 0)
+ {
+ lat = act_lat - corrected_overlap;
+ in_between_case++;
+ partial_overlapping++;
+ }
+ else
+ {
+ lat = act_lat;
+ worst_case++;
+ }
+ }
+ }
+ lastCmdIsRead = cmdIsRead;
+ last_bank=current_bank;
+ last_row = current_row;
+
+ lat += chunks;
+
+ if (cpu_ratio < 1.0)
+ {
+ lat = (lat+((int)(1/cpu_ratio)-1))/(int)(1/cpu_ratio);
+ }
+ else
+ {
+ temp = (int)(lat*cpu_ratio);
+ lat = (lat*cpu_ratio == temp)?temp:(temp+1); /*round up*/
+ }
+
+ /*fprintf(stderr,"%4d \n",lat); debugging */
+
+ if (overlap <= 0) /*memory interface is not busy*/
+ {
+ busy_until[current_bank] = curTick+lat;
+ }
+ else /*the memory request will be satisfied temp cycles after curTick*/
+ {
+ busy_until[current_bank] +=lat;
+ command_overlapping++;
+ total_arb_latency += overlap;
+ lat+=overlap;
+ }
+ if (!cmdIsRead)
+ {
+ temp = (int)(((dpl_lat-1) + pre_lat)*cpu_ratio);
+ busy_until[current_bank] += (((dpl_lat-1) + pre_lat)*cpu_ratio == temp)?temp:(temp+1);
+ }
+
+
+
+ /*fprintf(stderr,"%10.0f %10.0f %4d %4d \n",(double)busy_until, (double)curTick, overlap, lat);debug*/
+ // if((_cpu_num < num_cpus) && (_cpu_num >= 0))
+ // cout <<"cpu id = " << _cpu_num << "current_bank = " << current_bank << endl;
+ // bank_access_profile[_cpu_num][current_bank]++;
+ return lat;
+ }
+
+ /******************************************************************/
+
+ else if ((mem_type == "DRDRAM") && (mem_actpolicy == "closed") && (memctrlpipe_enable == true))
+ /* DRDRAM closed-page with overlap*/
+ {
+
+ if ((memctrladdr_type != "interleaved"))/*i.e. mc_type is linear*/
+ {
+ current_bank=physic_address/DR_BANK_SIZE;
+ current_device=current_bank/(DR_NUM_BANKS/DR_NUM_DEVS);
+ }
+ else/*mc_type interleaved*/
+ /* This memory management unit maps the addresses different
+ * depending on the row-size, every row is mapped to another
+ * bank. So the text segment uses half of every bank. The heap
+ * the next quarter of each bank and the stack the rest.
+ */
+ {
+ num_blocks = physic_address/DR_ROW_SIZE; /* row number */
+ current_bank=(num_blocks%DR_NUM_BANKS)*2; /*every 'second' bank will be used*/
+ /*banks above DR_NUM_BANKS are the uneven banks*/
+ current_bank = ((current_bank < DR_NUM_BANKS) ? current_bank:(current_bank - DR_NUM_BANKS+1));
+ current_device=current_bank/(DR_NUM_BANKS/DR_NUM_DEVS);
+ }
+
+
+ if (mem_access_details == true)
+ {
+ //fprintf(mem_accessfd," %09u %3d \n",physic_address,current_bank);
+ }
+ else
+ {
+ if (mem_access_output!=NULL)
+ {
+ //fprintf(mem_accessfd,"\n");
+ }
+ }
+ total_access++;
+
+ overlap=(int)(busy_until[current_bank] - curTick);
+
+ if (cpu_ratio < 1.0)
+ {
+ corrected_overlap = overlap*((int)(1/cpu_ratio)); /* floor */
+ }
+ else
+ {
+ corrected_overlap = (int) (overlap/cpu_ratio);
+ }
+
+ if (current_bank == last_bank)/*same bank*/
+ {
+ if ((lastCmdIsRead == cmdIsRead) && (cmdIsRead))/* RAR */
+ {
+ lat = DR_T_RCD + DR_T_CAC + DR_T_PACKET;
+ worst_case++;
+ }
+ else if ((lastCmdIsRead == cmdIsRead) && (!cmdIsRead)) /* WAW */
+ {
+ lat = DR_T_RCD + DR_T_CWD + DR_T_PACKET;
+ worst_case++;
+ }
+ else if ((lastCmdIsRead != cmdIsRead) && (cmdIsRead)) /* RAW */
+ {
+ lat = DR_T_RCD + DR_T_CAC + DR_T_PACKET;
+ worst_case++;
+ }
+ else /* WAR */
+ {
+ lat = DR_T_RCD + DR_T_CWD + DR_T_PACKET;
+ worst_case++;
+ }
+ }
+ else /* other bank */
+ {
+ if ((lastCmdIsRead == cmdIsRead) && (cmdIsRead))/* RAR */
+ {
+ if (corrected_overlap > DR_T_RAS + DR_T_RP - 2 * DR_T_PACKET)
+ {
+ lat = - DR_T_RAS + DR_T_RCD + DR_T_PACKET + DR_T_CAC;
+ best_case++;
+ full_overlapping++;
+ }
+ else if (corrected_overlap > 0)
+ {
+ lat = DR_T_RCD + DR_T_CAC + DR_T_PACKET - corrected_overlap;
+ in_between_case++;
+ partial_overlapping++;
+ }
+ else
+ {
+ lat = DR_T_RCD + DR_T_CAC + DR_T_PACKET;
+ worst_case++;
+ }
+ }
+ else if ((lastCmdIsRead == cmdIsRead) && (!cmdIsRead)) /* WAW */
+ {
+ if (corrected_overlap > DR_T_RCD + DR_T_RTR + DR_T_RP)
+ {
+ lat = - DR_T_CWD - 2 * DR_T_PACKET + DR_T_RTR;
+ best_case++;
+ full_overlapping++;
+ }
+ else if (corrected_overlap > 0)
+ {
+ lat = DR_T_RCD + DR_T_CWD + DR_T_PACKET - corrected_overlap;
+ in_between_case++;
+ partial_overlapping++;
+ }
+ else
+ {
+ lat = DR_T_RCD + DR_T_CWD + DR_T_PACKET;
+ worst_case++;
+ }
+ }
+ else if ((lastCmdIsRead != cmdIsRead) && (cmdIsRead)) /* RAW */
+ {
+ if (current_device == last_dev) /* same device */
+ {
+ if (corrected_overlap > DR_T_RCD + DR_T_RP)
+ {
+ lat = DR_T_PACKET + DR_T_CAC - DR_T_RP;
+ best_case++;
+ partial_overlapping++;
+ }
+ else if (corrected_overlap > 0)
+ {
+ lat = DR_T_RCD + DR_T_CAC + DR_T_PACKET - corrected_overlap;
+ in_between_case++;
+ partial_overlapping++;
+ }
+ else
+ {
+ lat = DR_T_RCD + DR_T_CAC + DR_T_PACKET;
+ worst_case++;
+ }
+ }
+ else /* other device */
+ {
+ if (corrected_overlap > DR_T_RCD + DR_T_RP + 2 * DR_T_PACKET)
+ {
+ lat = - DR_T_PACKET + DR_T_CAC - DR_T_RP;
+ best_case++;
+ partial_overlapping++;
+ }
+ else if (corrected_overlap > 0)
+ {
+ lat = DR_T_RCD + DR_T_CAC + DR_T_PACKET - corrected_overlap;
+ in_between_case++;
+ partial_overlapping++;
+ }
+ else
+ {
+ lat = DR_T_RCD + DR_T_CAC + DR_T_PACKET;
+ worst_case++;
+ }
+ }
+ }
+ else /* WAR */
+ {
+ if (corrected_overlap > DR_T_RAS + DR_T_RP - 2 * DR_T_PACKET - (DR_T_CAC - DR_T_CWD))
+ {
+ lat = - DR_T_RAS + DR_T_RCD + DR_T_PACKET + DR_T_CAC;
+ best_case++;
+ full_overlapping++;
+ }
+ else if (corrected_overlap > 0)
+ {
+ lat = DR_T_RCD + DR_T_CWD + DR_T_PACKET - corrected_overlap;
+ in_between_case++;
+ partial_overlapping++;
+ }
+ else
+ {
+ lat = DR_T_RCD + DR_T_CWD + DR_T_PACKET;
+ worst_case++;
+ }
+ }
+ }
+
+ lat += chunks * DR_T_PACKET; /*every 128 bit need DR_NUM_CYCLES*/
+
+ /*fprintf(stderr,"%4d ",lat);debugging*/
+
+ if (cpu_ratio < 1.0)
+ {
+ lat = (lat+((int)(1/cpu_ratio)-1))/(int)(1/cpu_ratio);
+ }
+ else
+ {
+ temp = (int)(lat*cpu_ratio);
+ lat = (lat*cpu_ratio == temp)?temp:(temp+1); /*round up*/
+ }
+
+ lastCmdIsRead=cmdIsRead;
+ last_bank=current_bank;
+ last_dev = current_device;
+
+ /*fprintf(stderr,"%4d \n",lat);debugging*/
+
+ if (overlap <= 0) /*memory interface is not busy*/
+ {
+ busy_until[current_bank] = curTick+lat;
+ }
+ else/*the memory request will be satisfied temp cycles after curTick*/
+ {
+ busy_until[current_bank] +=lat;
+ command_overlapping++;
+ lat+=overlap;
+ }
+
+ /*fprintf(stderr,"%10.0f %10.0f %4d %4d \n",(double)busy_until, (double)curTick, overlap, lat);*/
+
+ if (cmdIsRead)
+ {
+ if (cpu_ratio < 1.0)
+ {
+ busy_until[current_bank] += abs(((DR_T_RAS - (DR_T_RCD + DR_T_PACKET + DR_T_CAC)) + 1)/((int)(1/cpu_ratio))); /* CPU clock cycles */
+ }
+ else
+ {
+ busy_until[current_bank] += (int) abs(((DR_T_RAS - (DR_T_RCD + DR_T_PACKET + DR_T_CAC)) + 1)*cpu_ratio); /* CPU clock cycles */
+ }
+ }
+ else /* !cmdIsRead */
+ {
+ if (cpu_ratio < 1.0)
+ {
+ busy_until[current_bank] += abs((-DR_T_PACKET + DR_T_RTR + DR_T_RP - DR_T_CWD + 1)/((int)(1/cpu_ratio))); /* CPU clock cycles */
+ }
+ else
+ {
+ busy_until[current_bank] += (int) abs((-DR_T_PACKET + DR_T_RTR + DR_T_RP - DR_T_CWD + 1)*cpu_ratio); /* CPU clock cycles */
+ }
+ }
+
+ // if((_cpu_num < num_cpus) && (_cpu_num >= 0))
+ // cout <<"cpu id = " << _cpu_num << "current_bank = " << current_bank << endl;
+ // bank_access_profile[_cpu_num][current_bank]++;
+ return lat;
+ }
+
+ /******************************************************************/
+
+ else if ((mem_type == "SDRAM") && (mem_actpolicy == "closed") && (memctrlpipe_enable == false))
+ /* SDRAM closed-page without overlap, 7/99 MG */
+ {
+ if (mem_access_output != NULL)
+ {
+ //fprintf(mem_accessfd,"\n");
+ }
+ assert(chunks >0);
+
+ if (cmdIsRead)
+ {
+ lat = act_lat + cas_lat;
+ }
+ else /* !cmdIsRead */
+ {
+ lat = act_lat;
+ }
+ total_access++;
+ lat += chunks;
+
+ overlap=(int)(busy_until[current_bank] - curTick);
+ lastCmdIsRead=cmdIsRead;
+
+ if (cpu_ratio < 1.0)
+ {
+ lat = (lat+((int)(1/cpu_ratio)-1))/(int)(1/cpu_ratio);
+ }
+ else
+ {
+ temp = (int)(lat*cpu_ratio);
+ lat = (lat*cpu_ratio == temp)?temp:(temp+1); /*round up*/
+ }
+
+ if (overlap <= 0) /*memory interface is not busy*/
+ {
+ busy_until[current_bank] = curTick+lat;
+ }
+ else/*the memory request will be satisfied temp cycles after curTick*/
+ {
+ busy_until[current_bank] +=lat;
+ command_overlapping++;
+ lat+=overlap;
+ }
+ if (!cmdIsRead)
+ {
+ temp = (int)(((dpl_lat-1) + pre_lat)*cpu_ratio);
+ busy_until[current_bank] += (((dpl_lat-1) + pre_lat)*cpu_ratio == temp)?temp:(temp+1);
+ }
+
+ // if((_cpu_num < num_cpus) && (_cpu_num >= 0))
+ // cout <<"cpu id = " << _cpu_num << "current_bank = " << current_bank << endl;
+ // bank_access_profile[_cpu_num][current_bank]++;
+ return lat;
+ }
+
+ /******************************************************************/
+
+ else if ((mem_type == "DRDRAM") && (mem_actpolicy == "closed") && (memctrlpipe_enable == false))
+ /* DRDRAM closed-page without overlap */
+ {
+ if (cmdIsRead)
+ {
+ lat = DR_T_RCD + DR_T_CAC + DR_T_PACKET; /* DR_T_RP + */
+ }
+ else /* !cmdIsRead */
+ {
+ lat = DR_T_RCD + DR_T_CWD + DR_T_PACKET; /* DR_T_RP + */
+ }
+ total_access++;
+ overlap=(int)(busy_until[current_bank] - curTick);
+ lat += chunks * DR_T_PACKET; /*every 128 bit need DR_NUM_CYCLES*/
+
+ if (cpu_ratio < 1.0)
+ {
+ lat = (lat+((int)(1/cpu_ratio)-1))/(int)(1/cpu_ratio);
+ }
+ else
+ {
+ temp = (int)(lat*cpu_ratio);
+ lat = (lat*cpu_ratio == temp)?temp:(temp+1); /*round up*/
+ }
+
+ lastCmdIsRead=cmdIsRead;
+
+ if (overlap <= 0) /*memory interface is not busy*/
+ {
+ busy_until[current_bank] = curTick+lat;
+ }
+ else/*the memory request will be satisfied temp cycles after curTick*/
+ {
+ busy_until[current_bank] += lat;
+ command_overlapping++;
+ lat+=overlap;
+ }
+
+ if (cmdIsRead)
+ {
+ if (cpu_ratio < 1.0)
+ {
+ busy_until[current_bank] += abs(((DR_T_RAS - (DR_T_RCD + DR_T_PACKET + DR_T_CAC)) + 1)/((int)(1/cpu_ratio))); /* CPU clock cycles */
+ }
+ else
+ {
+ busy_until[current_bank] += (int) abs(((DR_T_RAS - (DR_T_RCD + DR_T_PACKET + DR_T_CAC)) + 1)*cpu_ratio); /* CPU clock cycles */
+ }
+ }
+ else /* !cmdIsRead */
+ {
+ if (cpu_ratio < 1.0)
+ {
+ busy_until[current_bank] += abs((-DR_T_PACKET + DR_T_RTR + DR_T_RP - DR_T_CWD + 1)/((int)(1/cpu_ratio))); /* CPU clock cycles */
+ }
+ else
+ {
+ busy_until[current_bank] += (int) abs((-DR_T_PACKET + DR_T_RTR + DR_T_RP - DR_T_CWD + 1)*cpu_ratio); /* CPU clock cycles */
+ }
+ }
+ // if((_cpu_num < num_cpus) && (_cpu_num >= 0))
+ // cout <<"cpu id = " << _cpu_num << "current_bank = " << current_bank << endl;
+ // bank_access_profile[_cpu_num][current_bank]++;
+ return lat;
+ }
+
+ /******************************************************************/
+
+ else /*STD*/
+ {
+ if (mem_access_output != NULL)
+ {
+ //fprintf(mem_accessfd,"\n");
+ }
+ assert(chunks >0);
+ // if((_cpu_num < num_cpus) && (_cpu_num >= 0))
+ // cout <<"cpu id = " << _cpu_num << "current_bank = " << current_bank << endl;
+ // bank_access_profile[_cpu_num][current_bank]++;
+ return(/* first chunk latency */act_lat +
+ (/* remainder chunk latency */cas_lat * (chunks - 1)));
+ }
+
+}
+
+/*end added by ar, MG*/
+
+/*begin added by ar, MG*/
+
+/* ================ helper functions ========================= */
+
+/****** DRDRAM specific: shared sense amplifiers ******/
+/* precharges the adjacent banks and returns the number of them (1 or 2)*/
+int /*number of precharged banks*/
+DRAMMemory::prechargeBanksAround(int bank)/*access to bank */
+{
+int temp;
+
+temp=bank%DR_BANK_SAMP;
+
+if (temp == 0) /*bank 0, 16,32 ....*/
+ {
+ if (active_row[bank+1]!=DR_NUM_ROWS)
+ {
+ precharge++;
+ active_row[bank+1]=DR_NUM_ROWS;
+ }
+ }
+else
+ {
+ if (temp==DR_BANK_SAMP-1)/*banks 15,31 ...*/
+ {
+ if (active_row[bank-1]!=DR_NUM_ROWS)
+ {
+ precharge++;
+ active_row[bank-1]=DR_NUM_ROWS;
+ }
+ }
+ else
+ {
+ if (active_row[bank-1]!=DR_NUM_ROWS)
+ {
+ precharge++;
+ active_row[bank-1]=DR_NUM_ROWS;
+ }
+ if (active_row[bank+1]!=DR_NUM_ROWS)
+ {
+ precharge++;
+ active_row[bank+1]=DR_NUM_ROWS;
+ }
+ }
+ }
+return precharge;
+}
+
+
+#ifndef DOXYGEN_SHOULD_SKIP_THIS
+
+BEGIN_DECLARE_SIM_OBJECT_PARAMS(DRAMMemory)
+
+ Param<std::string> file;
+ Param<Range<Addr> > range;
+ Param<Tick> latency;
+ /* additional params for dram protocol*/
+ Param<int> cpu_ratio;
+ Param<std::string> mem_type;
+ Param<std::string> mem_actpolicy;
+ Param<std::string> memctrladdr_type;
+ Param<int> bus_width;
+ Param<int> act_lat;
+ Param<int> cas_lat;
+ Param<int> war_lat;
+ Param<int> pre_lat;
+ Param<int> dpl_lat;
+ Param<int> trc_lat;
+ Param<int> num_banks;
+ Param<int> num_cpus;
+
+END_DECLARE_SIM_OBJECT_PARAMS(DRAMMemory)
+
+BEGIN_INIT_SIM_OBJECT_PARAMS(DRAMMemory)
+
+ INIT_PARAM_DFLT(file, "memory mapped file", ""),
+ INIT_PARAM(range, "Device Address Range"),
+ INIT_PARAM(latency, "Memory access latency"),
+
+ /* additional params for dram protocol*/
+ INIT_PARAM_DFLT(cpu_ratio,"ratio between CPU speed and memory bus speed",5),
+ INIT_PARAM_DFLT(mem_type,"type of DRAM","SDRAM"),
+ INIT_PARAM_DFLT(mem_actpolicy,"open / closed page policy","open"),
+ INIT_PARAM_DFLT(memctrladdr_type,"interleaved or direct mapping","interleaved"),
+ INIT_PARAM_DFLT(bus_width,"memory access bus width",16),
+ INIT_PARAM_DFLT(act_lat,"RAS to CAS delay",2),
+ INIT_PARAM_DFLT(cas_lat,"CAS delay",1),
+ INIT_PARAM_DFLT(war_lat,"write after read delay",2),
+ INIT_PARAM_DFLT(pre_lat,"precharge delay",2),
+ INIT_PARAM_DFLT(dpl_lat,"data in to precharge delay",2),
+ INIT_PARAM_DFLT(trc_lat,"row cycle delay",6),
+ INIT_PARAM_DFLT(num_banks,"Number of Banks",4),
+ INIT_PARAM_DFLT(num_cpus,"Number of CPUs connected to DRAM",4)
+
+END_INIT_SIM_OBJECT_PARAMS(DRAMMemory)
+
+CREATE_SIM_OBJECT(DRAMMemory)
+{
+ DRAMMemory::Params *p = new DRAMMemory::Params;
+ p->name = getInstanceName();
+ p->addrRange = range;
+ p->latency = latency;
+
+ /* additional params for dram */
+ p->cpu_ratio = cpu_ratio;
+ p->bus_width = bus_width;
+ p->mem_type = mem_type;
+ p->mem_actpolicy = mem_actpolicy;
+ p->memctrladdr_type = memctrladdr_type;
+ p->act_lat = act_lat;
+ p->cas_lat = cas_lat;
+ p->war_lat = war_lat;
+ p->pre_lat = pre_lat;
+ p->dpl_lat = dpl_lat;
+ p->trc_lat = trc_lat;
+ p->num_banks = num_banks;
+ p->num_cpus = num_cpus;
+
+ return new DRAMMemory(p);
+}
+
+REGISTER_SIM_OBJECT("DRAMMemory", DRAMMemory)
+
+#endif // DOXYGEN_SHOULD_SKIP_THIS
+
+
projects / gem5.git / commitdiff