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Wally previously was overcounting retired instructions when they were flushed.

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InstrValidM was used to control when the counter was updated.  However this is
not suppress the counter when the instruction is flushed in the M stage.
This commit is contained in:
Ross Thompson 2021-08-23 12:24:03 -05:00
parent 9fdcc6c9ca
commit c31b7b4dc5
3 changed files with 64 additions and 44 deletions
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3
wally-pipelined/src/privileged/csr.sv
View File

@ -33,7 +33,8 @@ module csr #(parameter
UIE_REGW = 12'b0
) (
input logic clk, reset,
input logic FlushW, StallD, StallE, StallM, StallW,
input logic FlushD, FlushE, FlushM, FlushW,
input logic StallD, StallE, StallM, StallW,
input logic [31:0] InstrD,InstrE,InstrM,
input logic [`XLEN-1:0] PCF, PCD, PCE, PCM, SrcAM,
input logic InterruptM,

35
wally-pipelined/src/privileged/csrc.sv
View File

@ -72,6 +72,7 @@ module csrc #(parameter
) (
input logic clk, reset,
input logic StallD, StallE, StallM, StallW,
input logic FlushD, FlushE, FlushM, FlushW,
input logic InstrValidM, LoadStallD, CSRMWriteM,
input logic BPPredDirWrongM,
input logic BTBPredPCWrongM,
@ -103,6 +104,10 @@ module csrc #(parameter
logic WriteHPMCOUNTER3M, WriteHPMCOUNTER4M;
logic [4:0] CounterNumM;
logic [`COUNTERS-1:3][`XLEN-1:0] HPMCOUNTER_REGW, HPMCOUNTERH_REGW;
logic InstrValidNotFlushedM;
assign InstrValidNotFlushedM = InstrValidM & ~StallW & ~FlushW;
//logic [`COUNTERS-1:3][`XLEN-1:0] HPMCOUNTERH_REGW;
// Write enables
@ -116,7 +121,7 @@ module csrc #(parameter
// Counter adders with inhibits for power savings
assign CYCLEPlusM = CYCLE_REGW + {63'b0, ~MCOUNTINHIBIT_REGW[0]};
//assign TIMEPlusM = TIME_REGW + 1; // can't be inhibited
assign INSTRETPlusM = INSTRET_REGW + {63'b0, InstrValidM & ~StallW & ~MCOUNTINHIBIT_REGW[2]};
assign INSTRETPlusM = INSTRET_REGW + {63'b0, InstrValidNotFlushedM & ~MCOUNTINHIBIT_REGW[2]};
//assign HPMCOUNTER3PlusM = HPMCOUNTER3_REGW + {63'b0, LoadStallD & ~MCOUNTINHIBIT_REGW[3]}; // count load stalls
//assign HPMCOUNTER4PlusM = HPMCOUNTER4_REGW + {63'b0, 1'b0 & ~MCOUNTINHIBIT_REGW[4]}; // change to count signals
assign NextCYCLEM = WriteCYCLEM ? CSRWriteValM : CYCLEPlusM[`XLEN-1:0];
@ -139,17 +144,23 @@ module csrc #(parameter
if(`QEMU) begin
assign CounterEvent[`COUNTERS-1:2] = 0;
end else begin
assign CounterEvent[2] = InstrValidM & ~StallW;
assign CounterEvent[3] = LoadStallD & ~StallD;
assign CounterEvent[4] = BPPredDirWrongM & ~StallM;
assign CounterEvent[5] = InstrClassM[0] & ~StallM;
assign CounterEvent[6] = BTBPredPCWrongM & ~StallM;
assign CounterEvent[7] = (InstrClassM[4] | InstrClassM[2] | InstrClassM[1]) & ~StallM;
assign CounterEvent[8] = RASPredPCWrongM & ~StallM;
assign CounterEvent[9] = InstrClassM[3] & ~StallM;
assign CounterEvent[10] = BPPredClassNonCFIWrongM & ~StallM;
assign CounterEvent[11] = DCacheAccess & ~StallM;
assign CounterEvent[12] = DCacheMiss & ~StallM;
logic LoadStallE, LoadStallM;
flopenrc #(1) LoadStallEReg(.clk, .reset, .clear(FlushE), .en(~StallE), .d(LoadStallD), .q(LoadStallE));
flopenrc #(1) LoadStallMReg(.clk, .reset, .clear(FlushM), .en(~StallM), .d(LoadStallE), .q(LoadStallM));
assign CounterEvent[2] = InstrValidNotFlushedM;
assign CounterEvent[3] = LoadStallM & InstrValidNotFlushedM;
assign CounterEvent[4] = BPPredDirWrongM & InstrValidNotFlushedM;
assign CounterEvent[5] = InstrClassM[0] & InstrValidNotFlushedM;
assign CounterEvent[6] = BTBPredPCWrongM & InstrValidNotFlushedM;
assign CounterEvent[7] = (InstrClassM[4] | InstrClassM[2] | InstrClassM[1]) & InstrValidNotFlushedM;
assign CounterEvent[8] = RASPredPCWrongM & InstrValidNotFlushedM;
assign CounterEvent[9] = InstrClassM[3] & InstrValidNotFlushedM;
assign CounterEvent[10] = BPPredClassNonCFIWrongM & InstrValidNotFlushedM;
assign CounterEvent[11] = DCacheAccess & InstrValidNotFlushedM;
assign CounterEvent[12] = DCacheMiss & InstrValidNotFlushedM;
assign CounterEvent[`COUNTERS-1:13] = 0; // eventually give these sources, including FP instructions, I$/D$ misses, branches and mispredictions
end

36
wally-pipelined/testbench/testbench-linux.sv
View File

@ -25,7 +25,7 @@
`include "wally-config.vh"
`define DEBUG_TRACE 1
`define DEBUG_TRACE 0
`define DontHaltOnCSRMisMatch 1
module testbench();
@ -129,6 +129,7 @@ module testbench();
integer NumCSRWIndex;
integer NumCSRPostWIndex;
// logic CurrentInterruptForce;
logic [`XLEN-1:0] InstrCountW;
// -----------
// Error Macro
@ -139,6 +140,7 @@ module testbench();
initial begin
data_file_all = $fopen({`LINUX_TEST_VECTORS,"all.txt"}, "r");
InstrCountW = '0;
end
/* -----\/----- EXCLUDED -----\/-----
@ -350,6 +352,7 @@ module testbench();
always @(negedge clk) begin
// always check PC, instruction bits
if (checkInstrW) begin
InstrCountW += 1;
// check PCW
fault = 0;
if(PCW != ExpectedPCW) begin
@ -363,6 +366,11 @@ module testbench();
fault = 1;
end
// check the number of instructions
if(dut.hart.priv.csr.genblk1.counters.genblk1.INSTRET_REGW != InstrCountW) begin
$display("%t, Number of instruction Retired = %d does not equal number of instructions in trace = %d", $time, dut.hart.priv.csr.genblk1.counters.genblk1.INSTRET_REGW, InstrCountW);
if(!`DontHaltOnCSRMisMatch) fault = 1;
end
#2; // delay 2 ns.
@ -427,7 +435,7 @@ module testbench();
$display("CSR: %s = %016x, expected = %016x", ExpectedCSRArrayW[NumCSRPostWIndex], dut.hart.priv.csr.genblk1.csrm.MHARTID_REGW, ExpectedCSRArrayValueW[NumCSRPostWIndex]);
end
if (dut.hart.priv.csr.genblk1.csrm.MHARTID_REGW != ExpectedCSRArrayValueW[NumCSRPostWIndex]) begin
$display("CSR: %s = %016x, does not equal expected value %016x", ExpectedCSRArrayW[NumCSRPostWIndex], dut.hart.priv.csr.genblk1.csrm.MHARTID_REGW, ExpectedCSRArrayValueW[NumCSRPostWIndex]);
$display("%t, CSR: %s = %016x, does not equal expected value %016x", $time, ExpectedCSRArrayW[NumCSRPostWIndex], dut.hart.priv.csr.genblk1.csrm.MHARTID_REGW, ExpectedCSRArrayValueW[NumCSRPostWIndex]);
if(!`DontHaltOnCSRMisMatch) fault = 1;
end
end
@ -436,7 +444,7 @@ module testbench();
$display("CSR: %s = %016x, expected = %016x", ExpectedCSRArrayW[NumCSRPostWIndex], dut.hart.priv.csr.genblk1.csrm.MSTATUS_REGW, ExpectedCSRArrayValueW[NumCSRPostWIndex]);
end
if ((dut.hart.priv.csr.genblk1.csrm.MSTATUS_REGW) != (ExpectedCSRArrayValueW[NumCSRPostWIndex])) begin
$display("CSR: %s = %016x, does not equal expected value %016x", ExpectedCSRArrayW[NumCSRPostWIndex], dut.hart.priv.csr.genblk1.csrm.MSTATUS_REGW, ExpectedCSRArrayValueW[NumCSRPostWIndex]);
$display("%t, CSR: %s = %016x, does not equal expected value %016x", $time, ExpectedCSRArrayW[NumCSRPostWIndex], dut.hart.priv.csr.genblk1.csrm.MSTATUS_REGW, ExpectedCSRArrayValueW[NumCSRPostWIndex]);
if(!`DontHaltOnCSRMisMatch) fault = 1;
end
end
@ -445,7 +453,7 @@ module testbench();
$display("CSR: %s = %016x, expected = %016x", ExpectedCSRArrayW[NumCSRPostWIndex], dut.hart.priv.csr.genblk1.csrm.MTVEC_REGW, ExpectedCSRArrayValueW[NumCSRPostWIndex]);
end
if (dut.hart.priv.csr.genblk1.csrm.MTVEC_REGW != ExpectedCSRArrayValueW[NumCSRPostWIndex]) begin
$display("CSR: %s = %016x, does not equal expected value %016x", ExpectedCSRArrayW[NumCSRPostWIndex], dut.hart.priv.csr.genblk1.csrm.MTVEC_REGW, ExpectedCSRArrayValueW[NumCSRPostWIndex]);
$display("%t, CSR: %s = %016x, does not equal expected value %016x", $time, ExpectedCSRArrayW[NumCSRPostWIndex], dut.hart.priv.csr.genblk1.csrm.MTVEC_REGW, ExpectedCSRArrayValueW[NumCSRPostWIndex]);
if(!`DontHaltOnCSRMisMatch) fault = 1;
end
end
@ -454,7 +462,7 @@ module testbench();
$display("CSR: %s = %016x, expected = %016x", ExpectedCSRArrayW[NumCSRPostWIndex], dut.hart.priv.csr.genblk1.csrm.MIP_REGW, ExpectedCSRArrayValueW[NumCSRPostWIndex]);
end
if (dut.hart.priv.csr.genblk1.csrm.MIP_REGW != ExpectedCSRArrayValueW[NumCSRPostWIndex]) begin
$display("CSR: %s = %016x, does not equal expected value %016x", ExpectedCSRArrayW[NumCSRPostWIndex], dut.hart.priv.csr.genblk1.csrm.MIP_REGW, ExpectedCSRArrayValueW[NumCSRPostWIndex]);
$display("%t, CSR: %s = %016x, does not equal expected value %016x", $time, ExpectedCSRArrayW[NumCSRPostWIndex], dut.hart.priv.csr.genblk1.csrm.MIP_REGW, ExpectedCSRArrayValueW[NumCSRPostWIndex]);
if(!`DontHaltOnCSRMisMatch) fault = 1;
end
end
@ -463,7 +471,7 @@ module testbench();
$display("CSR: %s = %016x, expected = %016x", ExpectedCSRArrayW[NumCSRPostWIndex], dut.hart.priv.csr.genblk1.csrm.MIE_REGW, ExpectedCSRArrayValueW[NumCSRPostWIndex]);
end
if (dut.hart.priv.csr.genblk1.csrm.MIE_REGW != ExpectedCSRArrayValueW[NumCSRPostWIndex]) begin
$display("CSR: %s = %016x, does not equal expected value %016x", ExpectedCSRArrayW[NumCSRPostWIndex], dut.hart.priv.csr.genblk1.csrm.MIE_REGW, ExpectedCSRArrayValueW[NumCSRPostWIndex]);
$display("%t, CSR: %s = %016x, does not equal expected value %016x", $time, ExpectedCSRArrayW[NumCSRPostWIndex], dut.hart.priv.csr.genblk1.csrm.MIE_REGW, ExpectedCSRArrayValueW[NumCSRPostWIndex]);
if(!`DontHaltOnCSRMisMatch) fault = 1;
end
end
@ -472,7 +480,7 @@ module testbench();
$display("CSR: %s = %016x, expected = %016x", ExpectedCSRArrayW[NumCSRPostWIndex], dut.hart.priv.csr.genblk1.csrm.MIDELEG_REGW, ExpectedCSRArrayValueW[NumCSRPostWIndex]);
end
if (dut.hart.priv.csr.genblk1.csrm.MIDELEG_REGW != ExpectedCSRArrayValueW[NumCSRPostWIndex]) begin
$display("CSR: %s = %016x, does not equal expected value %016x", ExpectedCSRArrayW[NumCSRPostWIndex], dut.hart.priv.csr.genblk1.csrm.MIDELEG_REGW, ExpectedCSRArrayValueW[NumCSRPostWIndex]);
$display("%t, CSR: %s = %016x, does not equal expected value %016x", $time, ExpectedCSRArrayW[NumCSRPostWIndex], dut.hart.priv.csr.genblk1.csrm.MIDELEG_REGW, ExpectedCSRArrayValueW[NumCSRPostWIndex]);
if(!`DontHaltOnCSRMisMatch) fault = 1;
end
end
@ -481,7 +489,7 @@ module testbench();
$display("CSR: %s = %016x, expected = %016x", ExpectedCSRArrayW[NumCSRPostWIndex], dut.hart.priv.csr.genblk1.csrm.MEDELEG_REGW, ExpectedCSRArrayValueW[NumCSRPostWIndex]);
end
if (dut.hart.priv.csr.genblk1.csrm.MEDELEG_REGW != ExpectedCSRArrayValueW[NumCSRPostWIndex]) begin
$display("CSR: %s = %016x, does not equal expected value %016x", ExpectedCSRArrayW[NumCSRPostWIndex], dut.hart.priv.csr.genblk1.csrm.MEDELEG_REGW, ExpectedCSRArrayValueW[NumCSRPostWIndex]);
$display("%t, CSR: %s = %016x, does not equal expected value %016x", $time, ExpectedCSRArrayW[NumCSRPostWIndex], dut.hart.priv.csr.genblk1.csrm.MEDELEG_REGW, ExpectedCSRArrayValueW[NumCSRPostWIndex]);
if(!`DontHaltOnCSRMisMatch) fault = 1;
end
end
@ -490,7 +498,7 @@ module testbench();
$display("CSR: %s = %016x, expected = %016x", ExpectedCSRArrayW[NumCSRPostWIndex], dut.hart.priv.csr.genblk1.csrm.MEPC_REGW, ExpectedCSRArrayValueW[NumCSRPostWIndex]);
end
if (dut.hart.priv.csr.genblk1.csrm.MEPC_REGW != ExpectedCSRArrayValueW[NumCSRPostWIndex]) begin
$display("CSR: %s = %016x, does not equal expected value %016x", ExpectedCSRArrayW[NumCSRPostWIndex], dut.hart.priv.csr.genblk1.csrm.MEPC_REGW, ExpectedCSRArrayValueW[NumCSRPostWIndex]);
$display("%t, CSR: %s = %016x, does not equal expected value %016x", $time, ExpectedCSRArrayW[NumCSRPostWIndex], dut.hart.priv.csr.genblk1.csrm.MEPC_REGW, ExpectedCSRArrayValueW[NumCSRPostWIndex]);
if(!`DontHaltOnCSRMisMatch) fault = 1;
end
end
@ -500,7 +508,7 @@ module testbench();
$display("CSR: %s = %016x, expected = %016x", ExpectedCSRArrayW[NumCSRPostWIndex], dut.hart.priv.csr.genblk1.csrm.MTVAL_REGW, ExpectedCSRArrayValueW[NumCSRPostWIndex]);
end
if (dut.hart.priv.csr.genblk1.csrm.MTVAL_REGW != ExpectedCSRArrayValueW[NumCSRPostWIndex]) begin
$display("CSR: %s = %016x, does not equal expected value %016x", ExpectedCSRArrayW[NumCSRPostWIndex], dut.hart.priv.csr.genblk1.csrm.MTVAL_REGW, ExpectedCSRArrayValueW[NumCSRPostWIndex]);
$display("%t, CSR: %s = %016x, does not equal expected value %016x", $time, ExpectedCSRArrayW[NumCSRPostWIndex], dut.hart.priv.csr.genblk1.csrm.MTVAL_REGW, ExpectedCSRArrayValueW[NumCSRPostWIndex]);
if(!`DontHaltOnCSRMisMatch) fault = 1;
end
end
@ -510,7 +518,7 @@ module testbench();
$display("CSR: %s = %016x, expected = %016x", ExpectedCSRArrayW[NumCSRPostWIndex], dut.hart.priv.csr.genblk1.csrs.SEPC_REGW, ExpectedCSRArrayValueW[NumCSRPostWIndex]);
end
if (dut.hart.priv.csr.genblk1.csrs.SEPC_REGW != ExpectedCSRArrayValueW[NumCSRPostWIndex]) begin
$display("CSR: %s = %016x, does not equal expected value %016x", ExpectedCSRArrayW[NumCSRPostWIndex], dut.hart.priv.csr.genblk1.csrs.SEPC_REGW, ExpectedCSRArrayValueW[NumCSRPostWIndex]);
$display("%t, CSR: %s = %016x, does not equal expected value %016x", $time, ExpectedCSRArrayW[NumCSRPostWIndex], dut.hart.priv.csr.genblk1.csrs.SEPC_REGW, ExpectedCSRArrayValueW[NumCSRPostWIndex]);
if(!`DontHaltOnCSRMisMatch) fault = 1;
end
end
@ -519,7 +527,7 @@ module testbench();
$display("CSR: %s = %016x, expected = %016x", ExpectedCSRArrayW[NumCSRPostWIndex], dut.hart.priv.csr.genblk1.csrs.genblk1.SCAUSE_REGW, ExpectedCSRArrayValueW[NumCSRPostWIndex]);
end
if (dut.hart.priv.csr.genblk1.csrs.genblk1.SCAUSE_REGW != ExpectedCSRArrayValueW[NumCSRPostWIndex]) begin
$display("CSR: %s = %016x, does not equal expected value %016x", ExpectedCSRArrayW[NumCSRPostWIndex], dut.hart.priv.csr.genblk1.csrs.genblk1.SCAUSE_REGW, ExpectedCSRArrayValueW[NumCSRPostWIndex]);
$display("%t, CSR: %s = %016x, does not equal expected value %016x", $time, ExpectedCSRArrayW[NumCSRPostWIndex], dut.hart.priv.csr.genblk1.csrs.genblk1.SCAUSE_REGW, ExpectedCSRArrayValueW[NumCSRPostWIndex]);
if(!`DontHaltOnCSRMisMatch) fault = 1;
end
end
@ -528,7 +536,7 @@ module testbench();
$display("CSR: %s = %016x, expected = %016x", ExpectedCSRArrayW[NumCSRPostWIndex], dut.hart.priv.csr.genblk1.csrs.STVEC_REGW, ExpectedCSRArrayValueW[NumCSRPostWIndex]);
end
if (dut.hart.priv.csr.genblk1.csrs.STVEC_REGW != ExpectedCSRArrayValueW[NumCSRPostWIndex]) begin
$display("CSR: %s = %016x, does not equal expected value %016x", ExpectedCSRArrayW[NumCSRPostWIndex], dut.hart.priv.csr.genblk1.csrs.STVEC_REGW, ExpectedCSRArrayValueW[NumCSRPostWIndex]);
$display("%t, CSR: %s = %016x, does not equal expected value %016x", $time, ExpectedCSRArrayW[NumCSRPostWIndex], dut.hart.priv.csr.genblk1.csrs.STVEC_REGW, ExpectedCSRArrayValueW[NumCSRPostWIndex]);
if(!`DontHaltOnCSRMisMatch) fault = 1;
end
end
@ -537,7 +545,7 @@ module testbench();
$display("CSR: %s = %016x, expected = %016x", ExpectedCSRArrayW[NumCSRPostWIndex], dut.hart.priv.csr.genblk1.csrs.genblk1.STVAL_REGW, ExpectedCSRArrayValueW[NumCSRPostWIndex]);
end
if (dut.hart.priv.csr.genblk1.csrs.genblk1.STVAL_REGW != ExpectedCSRArrayValueW[NumCSRPostWIndex]) begin
$display("CSR: %s = %016x, does not equal expected value %016x", ExpectedCSRArrayW[NumCSRPostWIndex], dut.hart.priv.csr.genblk1.csrs.genblk1.STVAL_REGW, ExpectedCSRArrayValueW[NumCSRPostWIndex]);
$display("%t, CSR: %s = %016x, does not equal expected value %016x", $time, ExpectedCSRArrayW[NumCSRPostWIndex], dut.hart.priv.csr.genblk1.csrs.genblk1.STVAL_REGW, ExpectedCSRArrayValueW[NumCSRPostWIndex]);
if(!`DontHaltOnCSRMisMatch) fault = 1;
end
end