Initial commit

1 files changed, 293 insertions, 0 deletions

diff --git a/sources/apps/Smalltest/read_write.cpp b/sources/apps/Smalltest/read_write.cpp
new file mode 100644
index 0000000..608b17a
--- /dev/null
+++ b/sources/apps/Smalltest/read_write.cpp
@@ -0,0 +1,293 @@
+#include "instruction.h"
+#include "prog.h"
+#include "platform.h"
+#include <fstream>
+#include <iostream>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <cstring>
+#include <list>
+
+using namespace std;
+
+#define USE_SMC_FILE 0
+
+#define NUM_BANKS 16
+#define NUM_ROWS 1024*32
+
+#define NUM_ROWS_REG  8
+#define NUM_BANKS_REG 11
+// Stride register ids are fixed and should not be changed
+// CASR should always be reg 0
+// BASR should always be reg 1
+// RASR should always be reg 2
+#define CASR 0
+#define BASR 1
+#define RASR 2
+
+#define PATTERN_REG 12
+
+#define BAR 7
+#define RAR 6
+#define CAR 4
+
+#define NUM_COLS_REG 14
+#define LOOP_COLS 13
+
+#define TEMP_PATTERN_REG 15
+
+/**
+ * @return an instruction formed by NOPs
+ */
+Inst all_nops()
+{
+  return  __pack_mininsts(SMC_NOP(), SMC_NOP(), SMC_NOP(), SMC_NOP());
+}
+
+int main()
+{
+  SoftMCPlatform platform;
+  int err;
+  uint32_t wr_pattern;
+  // buffer allocated for reading data from the board
+  char* buf = (char*) malloc(sizeof(char)*32*1024);
+
+  // Demo using the smc file as program input
+  if(USE_SMC_FILE)
+  {
+    // Load demo smc program from file using
+    // program's constructor
+    Program program("read_write.smc");
+    wr_pattern = 0x1a2b3c4d;
+    printf("Program Ready\n");
+
+    // Initialize the platform, opens file descriptors for the board PCI-E interface.
+    if((err = platform.init()) != SOFTMC_SUCCESS){
+        cerr << "Could not initialize SoftMC Platform: " << err << endl;
+    }
+    // reset the board to hopefully restore the board's state
+    platform.reset_fpga();
+    // Transfer the program to the FPGA board
+    platform.execute(program);
+    printf("Sent instructions\n");
+  }
+  else
+  {
+
+    // Initialize the platform, opens file descriptors for the board PCI-E interface.
+    if((err = platform.init()) != SOFTMC_SUCCESS){
+        cerr << "Could not initialize SoftMC Platform: " << err << endl;
+    }
+    // reset the board to hopefully restore the board's state
+    platform.reset_fpga();
+
+    Program program;
+    /* SoftMC programs are formed sequentially by adding
+     * instructions to the program one by one. Instructions
+     * can be added to the program using add_inst().
+     */
+
+    program.add_inst(SMC_LI(NUM_ROWS, NUM_ROWS_REG)); // load NUM_ROWS into NUM_ROWS_REG
+    program.add_inst(SMC_LI(NUM_BANKS, NUM_BANKS_REG)); // load NUM_BANKS into NUM_BANKS_REG
+    
+    // Stride registers are used to increment the row,bank,column registers without
+    // using regular (non-DDR) instructions. This way the DRAM array can be traversed much faster
+
+    program.add_inst(SMC_LI(8, CASR)); // Load 8 into CASR since each READ reads 8 columns
+    program.add_inst(SMC_LI(1, BASR)); // Load 1 into BASR
+    program.add_inst(SMC_LI(1, RASR)); // Load 1 into RASR
+
+    // Initialize PRNG, this test will randomly generate
+    // the first data to write into DRAM, it will modify
+    // the data by cyclic shifting and multiplying it with itself
+    // during runtime (this will be further explained down below).
+    srand(time(NULL)+getpid());
+    uint16_t rand1 = (uint16_t) rand();
+    wr_pattern = rand1 << 16;
+    wr_pattern |= ((uint16_t)rand());
+    printf("wr_pattern: %x\n", wr_pattern);
+
+    // Load WR data into pattern register whose content
+    // will be replicated among all words in the wide register
+    // Wide register is a 512-bit register, its content will
+    // be written to DRAM with SMC_WR commands.
+    program.add_inst(SMC_LI(wr_pattern, PATTERN_REG)); 
+    for(int i = 0 ; i < 16 ; i++)
+      program.add_inst(SMC_LDWD(PATTERN_REG,i));
+
+    program.add_inst(SMC_LI(0, BAR)); // Initialize BAR (bank address register) with 0
+
+    // add_label is used to add a label that can be used as a branch target to the program
+    program.add_label("BANK_BEGIN");
+
+    program.add_inst(SMC_LI(0, RAR)); // Initialize RAR with 0
+   
+    program.add_label("ROW_BEGIN");
+
+    program.add_inst(SMC_LI(0, CAR)); // Initialize CAR with 0
+
+    // Four DRAM commands are issued at the same time
+    // to DRAM by SoftMC.
+    
+    // PREcharge bank BAR and wait for tRP (11 NOPs, 11 SoftMC cycles) 
+    program.add_inst(
+      SMC_PRE(BAR, 0, 0),
+      SMC_NOP(), SMC_NOP(), SMC_NOP()
+    );
+    program.add_inst(all_nops());
+    program.add_inst(all_nops());
+    
+    // ACT & wait for tRCD
+    program.add_inst(
+      SMC_ACT(BAR, 0, RAR, 0),
+      SMC_NOP(), SMC_NOP(), SMC_NOP()
+    );
+    program.add_inst(all_nops());
+    program.add_inst(all_nops());
+
+    // We are now going to loop over all 512-bits in the row
+    // Since each row is 2^13 bytes we need to WR 128 times
+    program.add_inst(SMC_LI(128,NUM_COLS_REG));  // Load COL_SIZE register
+    program.add_inst(SMC_LI(0,LOOP_COLS));   // Load loop variable
+
+    /*
+     * Try to write a different pattern to each cache line
+     * in DRAM.
+     */
+    program.add_label("WR_BEGIN");
+
+    // Write to a whole row, increment CAR per WR
+    program.add_inst(
+      SMC_WRITE(BAR, 0, CAR, 1, 0, 0),
+      SMC_NOP(), SMC_NOP(), SMC_NOP()
+    );
+    
+    // Reload wide reg with the new data pattern
+    program.add_inst(SMC_SRC(PATTERN_REG,PATTERN_REG));
+    for(int i = 0 ; i < 16 ; i++)
+      program.add_inst(SMC_LDWD(PATTERN_REG,i));
+    
+    program.add_inst(SMC_ADDI(LOOP_COLS,1,LOOP_COLS));
+    // add a branch lower instruction which will jump to WR_BEGIN
+    // as long as LOOP_COLS<NUM_COLS, to iterate over the whole row
+    program.add_branch(program.BR_TYPE::BL,LOOP_COLS,NUM_COLS_REG, "WR_BEGIN");
+    // END "WR_BEGIN" LOOP
+
+    // Add more randomness to the PATTERN_REG by multiplying it by 3
+    // This happens when a row is written to
+    program.add_inst(SMC_MV(PATTERN_REG,TEMP_PATTERN_REG));
+    program.add_inst(SMC_ADD(PATTERN_REG,TEMP_PATTERN_REG,PATTERN_REG));
+    program.add_inst(SMC_ADD(PATTERN_REG,TEMP_PATTERN_REG,PATTERN_REG));
+    for(int i = 0 ; i < 16 ; i++)
+      program.add_inst(SMC_LDWD(PATTERN_REG,i));
+   
+    // Wait for t(write-precharge)
+    // & precharge the open bank
+    program.add_inst(all_nops());
+    program.add_inst(all_nops());
+    program.add_inst(
+      SMC_PRE(BAR, 0, 0),
+      SMC_NOP(), SMC_NOP(), SMC_NOP()
+    );
+
+    program.add_inst(SMC_LI(0, CAR)); // reload CAR we are now going to read the whole row
+    
+    // PRE & wait for tRP
+    program.add_inst(
+      SMC_PRE(BAR, 0, 0),
+      SMC_NOP(), SMC_NOP(), SMC_NOP()
+    );
+    program.add_inst(all_nops());
+    program.add_inst(all_nops());
+
+    // ACT & wait for tRCD
+    program.add_inst(
+      SMC_ACT(BAR, 0, RAR, 0),
+      SMC_NOP(), SMC_NOP(), SMC_NOP()
+    );
+    program.add_inst(all_nops());
+    program.add_inst(all_nops());
+
+    // Read from a whole row
+    // Essentially this can be imagined as an unrolled read whole row loop
+    for(int i = 0 ; i < 128 ; i++){
+      program.add_inst(
+        SMC_READ(BAR, 0, CAR, 1, 0, 0),
+        SMC_NOP(), SMC_NOP(), SMC_NOP()
+      );
+      program.add_inst(all_nops());
+    }
+    
+    // Wait for t(read-precharge)
+    // & precharge the open bank
+    program.add_inst(all_nops());
+    program.add_inst(all_nops());
+    program.add_inst(
+      SMC_PRE(BAR, 0, 0),
+      SMC_NOP(), SMC_NOP(), SMC_NOP()
+    );
+
+    // Increment row address by one since we are finished with this row
+    program.add_inst(SMC_ADDI(RAR,1,RAR));
+    program.add_branch(program.BR_TYPE::BL,RAR,NUM_ROWS_REG, "ROW_BEGIN");
+    program.add_inst(SMC_ADDI(BAR,1,BAR));
+    program.add_branch(program.BR_TYPE::BL,BAR,NUM_BANKS_REG,"BANK_BEGIN");
+    
+    program.add_inst(all_nops());
+    program.add_inst(all_nops());
+    program.add_inst(all_nops());
+    program.add_inst(all_nops());
+
+    program.dump_registers();
+
+    // Tells SoftMC that the user program has ended
+    program.add_inst(SMC_END());
+
+    // Transfer the program to the FPGA board
+    platform.execute(program);
+    printf("Program Ready\n");
+    program.pretty_print();
+    printf("Sent instructions\n");
+  }
+
+  // Read count
+  int rc = 0;
+
+  uint32_t pattern = wr_pattern;  
+  uint64_t err_count = 0;  
+  // Below loop reads continuously from the FPGA board
+  // since we know in what order we are issuing our reads
+  // we know what physical address they are reading
+  while(1)
+  {
+    platform.receiveData(buf, 8*1024); // read one row each iteration
+    for(int j = 0 ; j < 128 ; j++){
+      // printf("Whole pattern for cacheline %d: %x\n", j, pattern);
+      for (int k = 0 ; k < 64 ; k++){ // each byte in cache line
+        uint8_t mini_patt = pattern >> ((uint32_t)(k%4)*8);
+        if(mini_patt != (uint8_t)buf[j*64 + k]){
+          err_count++;
+          fprintf(stderr,"t1: Pattern mismatch! Bank: %d Row: %d CacheLine: %d Byte: %d Expect: %x Read: %x\n", 
+                rc/(1024*32), rc%(1024*32), j, k, mini_patt, (uint8_t)buf[j*64 + k]);
+          //fprintf(stderr,"%d %d %d %x\n", 
+            //    rc/(1024*32), rc%(1024*32), j*64 + k, mini_patt^(uint8_t)buf[j*64 + k]);
+        }
+      }
+
+      //shift pattern at each row iteration
+      uint32_t imd  = pattern >> (uint32_t)1;
+      uint32_t imd2 = pattern << (uint32_t)31;
+      pattern = imd | imd2; 
+    }
+    pattern = pattern*(uint32_t)3;
+    rc++;
+    if(rc % (1024*32) == 0)
+      printf("Bank %d finished!\n", rc/1024/32);
+    if(rc == 1024*32*16)
+      break;
+  }
+  printf("%ld out of %ld bytes have errors, last pattern: 0x%x\n",
+    err_count, (uint64_t)NUM_BANKS*NUM_ROWS*8192, pattern);
+  platform.readRegisterDump();
+}