Github_Repos/cvw
1
0
Fork 1
mirror of https://github.com/openhwgroup/cvw synced 2025-02-11 06:05:49 +00:00
Code Issues Packages Projects Releases Wiki Activity

Merge branch 'main' of https://github.com/davidharrishmc/riscv-wally into main

Browse Source
This commit is contained in:
Ross Thompson 2021-03-12 14:58:04 -06:00
commit 6ee97830f7
22 changed files with 506 additions and 99 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

31
wally-pipelined/config/busybear/wally-constants.vh Normal file
View File

@ -0,0 +1,31 @@
//////////////////////////////////////////
// wally-constants.vh
//
// Written: tfleming@hmc.edu 4 March 2021
// Modified:
//
// Purpose: Specify certain constants defined in the RISC-V 64-bit architecture.
// These macros should not be changed, except in the event of an
// update to the architecture or particularly special circumstances.
//
// A component of the Wally configurable RISC-V project.
//
// Copyright (C) 2021 Harvey Mudd College & Oklahoma State University
//
// Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation
// files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy,
// modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software
// is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
// BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT
// OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
///////////////////////////////////////////
// Virtual Memory Constants (sv39)
`define VPN_BITS 27
`define PPN_BITS 44
`define PA_BITS 56

31
wally-pipelined/config/coremark/wally-constants.vh Normal file
View File

@ -0,0 +1,31 @@
//////////////////////////////////////////
// wally-constants.vh
//
// Written: tfleming@hmc.edu 4 March 2021
// Modified:
//
// Purpose: Specify certain constants defined in the RISC-V 64-bit architecture.
// These macros should not be changed, except in the event of an
// update to the architecture or particularly special circumstances.
//
// A component of the Wally configurable RISC-V project.
//
// Copyright (C) 2021 Harvey Mudd College & Oklahoma State University
//
// Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation
// files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy,
// modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software
// is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
// BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT
// OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
///////////////////////////////////////////
// Virtual Memory Constants (sv39)
`define VPN_BITS 27
`define PPN_BITS 44
`define PA_BITS 56

31
wally-pipelined/config/rv32ic/wally-constants.vh Normal file
View File

@ -0,0 +1,31 @@
//////////////////////////////////////////
// wally-constants.vh
//
// Written: tfleming@hmc.edu 4 March 2021
// Modified:
//
// Purpose: Specify certain constants defined in the RISC-V 64-bit architecture.
// These macros should not be changed, except in the event of an
// update to the architecture or particularly special circumstances.
//
// A component of the Wally configurable RISC-V project.
//
// Copyright (C) 2021 Harvey Mudd College & Oklahoma State University
//
// Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation
// files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy,
// modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software
// is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
// BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT
// OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
///////////////////////////////////////////
// Virtual Memory Constants (sv32)
`define VPN_BITS 20
`define PPN_BITS 22
`define PA_BITS 34

31
wally-pipelined/config/rv64ic/wally-constants.vh Normal file
View File

@ -0,0 +1,31 @@
//////////////////////////////////////////
// wally-constants.vh
//
// Written: tfleming@hmc.edu 4 March 2021
// Modified:
//
// Purpose: Specify certain constants defined in the RISC-V 64-bit architecture.
// These macros should not be changed, except in the event of an
// update to the architecture or particularly special circumstances.
//
// A component of the Wally configurable RISC-V project.
//
// Copyright (C) 2021 Harvey Mudd College & Oklahoma State University
//
// Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation
// files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy,
// modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software
// is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
// BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT
// OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
///////////////////////////////////////////
// Virtual Memory Constants (sv39)
`define VPN_BITS 27
`define PPN_BITS 44
`define PA_BITS 56

31
wally-pipelined/config/rv64icfd/wally-constants.vh Normal file
View File

@ -0,0 +1,31 @@
//////////////////////////////////////////
// wally-constants.vh
//
// Written: tfleming@hmc.edu 4 March 2021
// Modified:
//
// Purpose: Specify certain constants defined in the RISC-V 64-bit architecture.
// These macros should not be changed, except in the event of an
// update to the architecture or particularly special circumstances.
//
// A component of the Wally configurable RISC-V project.
//
// Copyright (C) 2021 Harvey Mudd College & Oklahoma State University
//
// Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation
// files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy,
// modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software
// is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
// BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT
// OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
///////////////////////////////////////////
// Virtual Memory Constants (sv39)
`define VPN_BITS 27
`define PPN_BITS 44
`define PA_BITS 56

34
wally-pipelined/regression/regression-wally.sh Executable file
View File

@ -0,0 +1,34 @@
#!/usr/bin/env bash
check_test () {
output=$(timeout 2m ./"$1" 2>/dev/null)
found=$(echo $output | grep -c "$2")
echo "$found"
}
echo "-----------------------"
echo "starting all regression tests!"
echo "note: this could take up to 3 minutes to run"
echo "-----------------------"
echo "checking verilator"
verilator_out=$(cd ..; ./lint-wally 2>&1)
[[ -z $verilator_out ]] && echo "verilator passed" || echo "verilator failed"
echo "starting Imperas rv64ic"
sleep 1
exec 3< <(check_test "sim-wally-batch" "All tests ran without failures.")
#echo "starting Imperas rv32ic"
#sleep 1
#exec 5< <(check_test "sim-wally-rv32ic" "All tests ran without failures.")
#echo "starting busybear"
sleep 1
exec 4< <(check_test "sim-busybear-batch" "loaded 100000 instructions")
echo "-----------------------"
echo "waiting for tests to finish..."
echo "-----------------------"
rv64_out=$(cat <&3)
[[ $rv64_out -eq 1 ]] && echo "rv64ic passed" || echo "rv64ic failed"
#rv32_out=$(cat <&5)
#[[ $rv32_out -eq 1 ]] && echo "rv32ic passed" || echo "rv32ic failed"
busybear_out=$(cat <&4)
[[ $busybear_out -eq 1 ]] && echo "busybear passed" || echo "busybear failed"
[[ -z $verilator_out && $rv64_out -eq 1 && $busybear_out -eq 1 ]] && echo "all passed" || echo "not all passed"
#[[ -z $verilator_out && $rv32_out -eq 1 && $rv64_out -eq 1 && $busybear_out -eq 1 ]] && echo "all passed" || echo "not all passed"

3
wally-pipelined/regression/sim-wally-rv32ic Executable file
View File

@ -0,0 +1,3 @@
vsim -c <<!
do wally-pipelined-batch.do ../config/rv32ic
!

16
wally-pipelined/src/dmem/dmem.sv
View File

@ -37,7 +37,7 @@ module dmem (
input logic [2:0] Funct3M,
//input logic [`XLEN-1:0] ReadDataW,
input logic [`XLEN-1:0] WriteDataM,
input logic AtomicM,
input logic [1:0] AtomicM,
output logic [`XLEN-1:0] MemPAdrM,
output logic MemReadM, MemWriteM,
output logic DataMisalignedM,
@ -51,25 +51,19 @@ module dmem (
output logic StoreMisalignedFaultM, StoreAccessFaultM,
// TLB management
//input logic [`XLEN-1:0] PageTableEntryM,
input logic [`XLEN-1:0] SATP_REGW,
//input logic DTLBWriteM, DTLBFlushM,
// *** satp value will come from CSRs
// input logic [`XLEN-1:0] SATP,
output logic DTLBMissM, DTLBHitM
);
logic SquashSCM;
// Initially no MMU
// *** temporary hack until we can figure out how to get actual satp value
// from priv unit -- Thomas F
logic [`XLEN-1:0] SATP = '0;
// *** temporary hack until walker is hooked up -- Thomas F
logic [`XLEN-1:0] PageTableEntryM = '0;
logic DTLBFlushM = '0;
logic DTLBWriteM = '0;
tlb #(3) dtlb(clk, reset, SATP, MemAdrM, PageTableEntryM, DTLBWriteM,
tlb #(3) dtlb(clk, reset, SATP_REGW, MemAdrM, PageTableEntryM, DTLBWriteM,
DTLBFlushM, MemPAdrM, DTLBMissM, DTLBHitM);
//assign MemPAdrM = MemAdrM;
// Determine if an Unaligned access is taking place
always_comb
@ -98,8 +92,8 @@ module dmem (
logic ReservationValidM, ReservationValidW;
logic lrM, scM, WriteAdrMatchM;
assign lrM = MemReadM && AtomicM;
assign scM = MemRWM[0] && AtomicM;
assign lrM = MemReadM && AtomicM[0];
assign scM = MemRWM[0] && AtomicM[0];
assign WriteAdrMatchM = MemRWM[0] && (MemPAdrM[`XLEN-1:2] == ReservationPAdrW) && ReservationValidW;
assign SquashSCM = scM && ~WriteAdrMatchM;
always_comb begin // ReservationValidM (next valiue of valid reservation)

57
wally-pipelined/src/ebu/ahblite.sv
View File

@ -35,6 +35,8 @@ module ahblite (
input logic StallW, FlushW,
// Load control
input logic UnsignedLoadM,
input logic [1:0] AtomicM,
input logic [6:0] Funct7M,
// Signals from Instruction Cache
input logic [`XLEN-1:0] InstrPAdrF, // *** rename these to match block diagram
input logic InstrReadF,
@ -44,6 +46,8 @@ module ahblite (
input logic MemReadM, MemWriteM,
input logic [`XLEN-1:0] WriteDataM,
input logic [1:0] MemSizeM,
// Signals from MMU ***
// MMUPAdr;
// Return from bus
output logic [`XLEN-1:0] ReadDataW,
// AHB-Lite external signals
@ -64,34 +68,41 @@ module ahblite (
output logic HWRITED,
// Stalls
output logic InstrStall,/*InstrUpdate, */DataStall
// *** add a chip-level ready signal as part of handshake
);
logic GrantData;
logic [2:0] ISize;
logic [`AHBW-1:0] HRDATAMasked, ReadDataM, ReadDataPreW;
logic [`AHBW-1:0] HRDATAMasked, ReadDataM, ReadDataPreW, WriteData;
logic IReady, DReady;
logic CaptureDataM;
assign HCLK = clk;
assign HRESETn = ~reset;
// *** initially support HABW = XLEN
// *** initially support AHBW = XLEN
// track bus state
// Data accesses have priority over instructions. However, if a data access comes
// while an instruction read is occuring, the instruction read finishes before
// the data access can take place.
typedef enum {IDLE, MEMREAD, MEMWRITE, INSTRREAD, INSTRREADMEMPENDING} statetype;
typedef enum {IDLE, MEMREAD, MEMWRITE, INSTRREAD, INSTRREADMEMPENDING, ATOMICREAD, ATOMICWRITE} statetype;
statetype BusState, NextBusState;
flopenl #(.TYPE(statetype)) busreg(HCLK, ~HRESETn, 1'b1, NextBusState, IDLE, BusState);
always_comb
case (BusState)
IDLE: if (MemReadM) NextBusState = MEMREAD; // Memory has pirority over instructions
IDLE: if (AtomicM[1]) NextBusState = ATOMICREAD;
else if (MemReadM) NextBusState = MEMREAD; // Memory has pirority over instructions
else if (MemWriteM) NextBusState = MEMWRITE;
else if (InstrReadF) NextBusState = INSTRREAD;
else NextBusState = IDLE;
ATOMICREAD: if (~HREADY) NextBusState = ATOMICREAD;
else NextBusState = ATOMICWRITE;
ATOMICWRITE: if (~HREADY) NextBusState = ATOMICWRITE;
else if (InstrReadF) NextBusState = INSTRREAD;
else NextBusState = IDLE;
MEMREAD: if (~HREADY) NextBusState = MEMREAD;
else if (InstrReadF) NextBusState = INSTRREAD;
else NextBusState = IDLE;
@ -107,17 +118,14 @@ module ahblite (
endcase
// stall signals
assign #2 DataStall = (NextBusState == MEMREAD) || (NextBusState == MEMWRITE) || (NextBusState == INSTRREADMEMPENDING);
assign #2 DataStall = (NextBusState == MEMREAD) || (NextBusState == MEMWRITE) ||
(NextBusState == ATOMICREAD) || (NextBusState == ATOMICWRITE) ||
(NextBusState == INSTRREADMEMPENDING);
assign #1 InstrStall = (NextBusState == INSTRREAD);
// DH 2/20/22: A cyclic path presently exists
// HREADY->NextBusState->GrantData->HSIZE->HSELUART->HREADY
// This is because the peripherals assert HREADY on the same cycle
// When memory is working, also fix the peripherals to respond on the subsequent cycle
// and this path should be fixed.
// bus outputs
assign #1 GrantData = (NextBusState == MEMREAD) || (NextBusState == MEMWRITE);
assign #1 GrantData = (NextBusState == MEMREAD) || (NextBusState == MEMWRITE) ||
(NextBusState == ATOMICREAD) || (NextBusState == ATOMICWRITE);
assign #1 HADDR = (GrantData) ? MemPAdrM[31:0] : InstrPAdrF[31:0];
assign ISize = 3'b010; // 32 bit instructions for now; later improve for filling cache with full width; ignored on reads anyway
assign #1 HSIZE = GrantData ? {1'b0, MemSizeM} : ISize;
@ -125,9 +133,9 @@ module ahblite (
assign HPROT = 4'b0011; // not used; see Section 3.7
assign HTRANS = (NextBusState != IDLE) ? 2'b10 : 2'b00; // NONSEQ if reading or writing, IDLE otherwise
assign HMASTLOCK = 0; // no locking supported
assign HWRITE = (NextBusState == MEMWRITE);
assign HWRITE = (NextBusState == MEMWRITE) || (NextBusState == ATOMICWRITE);
// delay write data by one cycle for
flop #(`XLEN) wdreg(HCLK, WriteDataM, HWDATA); // delay HWDATA by 1 cycle per spec; *** assumes AHBW = XLEN
flop #(`XLEN) wdreg(HCLK, WriteData, HWDATA); // delay HWDATA by 1 cycle per spec; *** assumes AHBW = XLEN
// delay signals for subword writes
flop #(3) adrreg(HCLK, HADDR[2:0], HADDRD);
flop #(4) sizereg(HCLK, {UnsignedLoadM, HSIZE}, HSIZED);
@ -138,11 +146,26 @@ module ahblite (
assign InstrRData = HRDATA;
assign ReadDataM = HRDATAMasked; // changed from W to M dh 2/7/2021
assign CaptureDataM = (BusState == MEMREAD) && (NextBusState != MEMREAD);
assign CaptureDataM = ((BusState == MEMREAD) && (NextBusState != MEMREAD)) ||
((BusState == ATOMICREAD) && (NextBusState == ATOMICWRITE));
// *** check if this introduces an unnecessary cycle of latency in memory accesses
flopenr #(`XLEN) ReadDataPreWReg(clk, reset, CaptureDataM, ReadDataM, ReadDataPreW); // *** this may break when there is no instruction read after data read
flopenr #(`XLEN) ReadDataWReg(clk, reset, ~StallW, ReadDataPreW, ReadDataW);
// Extract and sign-extend subwords if necessary
subwordread swr(.*);
endmodule
// Handle AMO instructions if applicable
generate
if (`A_SUPPORTED) begin
logic [`XLEN-1:0] AMOResult;
// amoalu amoalu(.a(HRDATA), .b(WriteDataM), .funct(Funct7M), .width(MemSizeM),
// .result(AMOResult));
amoalu amoalu(.srca(ReadDataPreW), .srcb(WriteDataM), .funct(Funct7M), .width(MemSizeM),
.result(AMOResult));
mux2 #(`XLEN) wdmux(WriteDataM, AMOResult, AtomicM[1], WriteData);
end else
assign WriteData = WriteDataM;
endgenerate
endmodule

78
wally-pipelined/src/ebu/amoalu.sv Normal file
View File

@ -0,0 +1,78 @@
///////////////////////////////////////////
// amoalu.sv
//
// Written: David_Harris@hmc.edu 10 March 2021
// Modified:
//
// Purpose: Performs AMO operations
//
// A component of the Wally configurable RISC-V project.
//
// Copyright (C) 2021 Harvey Mudd College & Oklahoma State University
//
// Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation
// files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy,
// modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software
// is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
// BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT
// OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
///////////////////////////////////////////
`include "wally-config.vh"
module amoalu (
input logic [`XLEN-1:0] srca, srcb,
input logic [6:0] funct,
input logic [1:0] width,
output logic [`XLEN-1:0] result);
logic [`XLEN-1:0] a, b, y;
// *** can this be muxed into the regular ALU to avoid needing a second one? Only a good
// idea if the regular ALU is not the critical path
// *** see how synthesis generates this and optimize more structurally if necessary to share hardware
// a single carry chain should be shared for + and the four min/max
// and the same mux can be used to select b for swap.
always_comb
case (funct[6:2])
5'b00001: y = b; // amoswap
5'b00000: y = a + b; // amoadd
5'b00100: y = a ^ b; // amoxor
5'b01100: y = a & b; // amoand
5'b01000: y = a | b; // amoor
5'b10000: y = ($signed(a) < $signed(b)) ? a : b; // amomin
5'b10100: y = ($signed(a) >= $signed(b)) ? a : b; // amomax
5'b11000: y = ($unsigned(a) < $unsigned(b)) ? a : b; // amominu
5'b11100: y = ($unsigned(a) >= $unsigned(b)) ? a : b; // amomaxu
default: y = 'bx; // undefined; *** could change to b for efficiency
endcase
// sign extend if necessary
generate
if (`XLEN == 32) begin
assign a = srca;
assign b = srcb;
assign result = y;
end else begin // `XLEN = 64
always_comb
if (width == 2'b10) begin // sign-extend word-length operations
// *** it would be more efficient to look at carry out of bit 31 to determine comparisons than do this big mux on and b
a = {{32{srca[31]}}, srca[31:0]};
b = {{32{srcb[31]}}, srcb[31:0]};
result = {{32{y[31]}}, y[31:0]};
end else begin
a = srca;
b = srcb;
result = y;
end
end
endgenerate
endmodule

106
wally-pipelined/src/ebu/pagetablewalker.sv_dev Normal file
View File

@ -0,0 +1,106 @@
///////////////////////////////////////////
// pagetablewalker.sv
//
// Written: tfleming@hmc.edu 2 March 2021
// Modified:
//
// Purpose: Page Table Walker
// Part of the Memory Management Unit (MMU)
//
// A component of the Wally configurable RISC-V project.
//
// Copyright (C) 2021 Harvey Mudd College & Oklahoma State University
//
// Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation
// files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy,
// modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software
// is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
// BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT
// OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
///////////////////////////////////////////
`include "wally-config.vh"
module pagetablewalker (
input logic clk, reset,
input logic [`XLEN-1:0] SATP_REGW,
input logic ITLBMissF, DTLBMissM,
input logic [`XLEN-1:0] TranslationVAdr,
input logic HCLK, HRESETn,
input logic HREADY,
output logic [`XLEN-1:0] PageTableEntryF, PageTableEntryM,
output logic ITLBWriteF, DTLBWriteM,
output logic TranslationComplete
);
/*
generate
if (`XLEN == 32) begin
logic Sv_Mode = satp[31]
end else begin
logic Sv_Mode [3:0] = satp[63:60]
end
endgenerate
*/
logic Sv_Mode = SATP_REGW[31];
logic BasePageTablePPN [21:0] = SATP_REGW[21:0];
logic VPN1 [9:0] = TranslationVAdr[31:22];
logic VPN0 [9:0] = TranslationVAdr[21:12]; // *** could optimize by not passing offset?
logic TranslationPAdr [33:0];
typedef enum {IDLE, DATA_LEVEL1, DATA_LEVEL0, DATA_LEAF, DATA FAULT} statetype;
statetype WalkerState, NextWalkerState;
always_ff @(posedge HCLK, negedge HRESETn)
if (~HRESETn) WalkerState <= #1 IDLE;
else WalkerState <= #1 NextWalkerState;
always_comb begin
NextWalkerState = 'X;
case (WalkerState)
IDLE: if (TLBMissM) NextWalkerState = LEVEL1;
else NextWalkerState = IDLE;
LEVEL1: if (HREADY && ValidEntry) NextWalkerState = LEVEL0;
else if (HREADY) NextWalkerState = FAULT;
else NextWalkerState = LEVEL1;
LEVEL2: if (HREADY && ValidEntry) NextWalkerState = LEAF;
else if (HREADY) NextWalkerState = FAULT;
else NextWalkerState = LEVEL2;
LEAF: NextWalkerState = IDLE;
endcase
end
always_ff @(posedge HCLK, negedge HRESETn)
if (~HRESETn) begin
TranslationPAdr <= '0;
PageTableEntryF <= '0;
TranslationComplete <= '0;
end else begin
// default values
case (NextWalkerState)
LEVEL1: TranslationPAdr <= {BasePageTablePPN, VPN1, 2'b00};
LEVEL2: TranslationPAdr <= {CurrentPPN, VPN0, 2'b00};
LEAF: begin
PageTableEntryF <= CurrentPageTableEntry;
TranslationComplete <= '1;
end
endcase
end
assign #1 Translate = (NextWalkerState == LEVEL1);
endmodule

63
wally-pipelined/src/ieu/controller.sv
View File

@ -48,7 +48,7 @@ module controller(
input logic StallM, FlushM,
output logic [1:0] MemRWM,
output logic CSRReadM, CSRWriteM, PrivilegedM,
output logic AtomicM,
output logic [1:0] AtomicM,
output logic [2:0] Funct3M,
output logic RegWriteM, // for Hazard Unit
// Writeback stage control signals
@ -65,6 +65,8 @@ module controller(
logic [6:0] Funct7D;
logic [4:0] Rs1D;
`define CTRLW 23
// pipelined control signals
logic RegWriteD, RegWriteE;
logic [2:0] ResultSrcD, ResultSrcE, ResultSrcM;
@ -77,11 +79,11 @@ module controller(
logic TargetSrcD, W64D, MulDivD;
logic CSRZeroSrcD;
logic CSRReadD;
logic AtomicD, AtomicE;
logic [1:0] AtomicD, AtomicE;
logic CSRWriteD, CSRWriteE;
logic InstrValidE, InstrValidM;
logic PrivilegedD, PrivilegedE;
logic [21:0] ControlsD;
logic [`CTRLW-1:0] ControlsD;
logic aluc3D;
logic subD, sraD, sltD, sltuD;
logic BranchTakenE;
@ -100,48 +102,47 @@ module controller(
generate
always_comb
case(OpD)
// *** Atomic p. 132 assembly encodings, defs 48
// RegWrite_ImmSrc_ALUSrc_MemRW_ResultSrc_Branch_ALUOp_Jump_TargetSrc_W64_CSRRead_Privileged_MulDiv_Atomic_Illegal
7'b0000000: ControlsD = 22'b0_000_00_00_000_0_00_0_0_0_0_0_0_0_1; // illegal instruction
7'b0000011: ControlsD = 22'b1_000_01_10_001_0_00_0_0_0_0_0_0_0_0; // lw
7'b0001111: ControlsD = 22'b0_000_00_00_000_0_00_0_0_0_0_0_0_0_0; // fence = nop
7'b0010011: ControlsD = 22'b1_000_01_00_000_0_10_0_0_0_0_0_0_0_0; // I-type ALU
7'b0010111: ControlsD = 22'b1_100_11_00_000_0_00_0_0_0_0_0_0_0_0; // auipc
7'b0000000: ControlsD = `CTRLW'b0_000_00_00_000_0_00_0_0_0_0_0_0_00_1; // illegal instruction
7'b0000011: ControlsD = `CTRLW'b1_000_01_10_001_0_00_0_0_0_0_0_0_00_0; // lw
7'b0001111: ControlsD = `CTRLW'b0_000_00_00_000_0_00_0_0_0_0_0_0_00_0; // fence = nop
7'b0010011: ControlsD = `CTRLW'b1_000_01_00_000_0_10_0_0_0_0_0_0_00_0; // I-type ALU
7'b0010111: ControlsD = `CTRLW'b1_100_11_00_000_0_00_0_0_0_0_0_0_00_0; // auipc
7'b0011011: if (`XLEN == 64)
ControlsD = 22'b1_000_01_00_000_0_10_0_0_1_0_0_0_0_0; // IW-type ALU for RV64i
ControlsD = `CTRLW'b1_000_01_00_000_0_10_0_0_1_0_0_0_00_0; // IW-type ALU for RV64i
else
ControlsD = 22'b0_000_00_00_000_0_00_0_0_0_0_0_0_0_1; // non-implemented instruction
7'b0100011: ControlsD = 22'b0_001_01_01_000_0_00_0_0_0_0_0_0_0_0; // sw
ControlsD = `CTRLW'b0_000_00_00_000_0_00_0_0_0_0_0_0_00_1; // non-implemented instruction
7'b0100011: ControlsD = `CTRLW'b0_001_01_01_000_0_00_0_0_0_0_0_0_00_0; // sw
7'b0101111: if (`A_SUPPORTED) begin
if (InstrD[31:27] == 5'b00010)
ControlsD = 22'b1_000_00_10_001_0_00_0_0_0_0_0_0_1_0; // lr
ControlsD = `CTRLW'b1_000_00_10_001_0_00_0_0_0_0_0_0_01_0; // lr
else if (InstrD[31:27] == 5'b00011)
ControlsD = 22'b1_101_01_01_101_0_00_0_0_0_0_0_0_1_0; // sc
ControlsD = `CTRLW'b1_101_01_01_101_0_00_0_0_0_0_0_0_01_0; // sc
else
ControlsD = 22'b0_000_00_00_000_0_00_0_0_0_0_0_0_1_0; // other atomic; decode later
ControlsD = `CTRLW'b1_101_01_11_001_0_00_0_0_0_0_0_0_10_0;; // amo
end else
ControlsD = 22'b0_000_00_00_000_0_00_0_0_0_0_0_0_0_1; // non-implemented instruction
ControlsD = `CTRLW'b0_000_00_00_000_0_00_0_0_0_0_0_0_00_1; // non-implemented instruction
7'b0110011: if (Funct7D == 7'b0000000 || Funct7D == 7'b0100000)
ControlsD = 22'b1_000_00_00_000_0_10_0_0_0_0_0_0_0_0; // R-type
ControlsD = `CTRLW'b1_000_00_00_000_0_10_0_0_0_0_0_0_00_0; // R-type
else if (Funct7D == 7'b0000001 && `M_SUPPORTED)
ControlsD = 22'b1_000_00_00_100_0_00_0_0_0_0_0_1_0_0; // Multiply/Divide
ControlsD = `CTRLW'b1_000_00_00_100_0_00_0_0_0_0_0_1_00_0; // Multiply/Divide
else
ControlsD = 22'b0_000_00_00_000_0_00_0_0_0_0_0_0_0_1; // non-implemented instruction
7'b0110111: ControlsD = 22'b1_100_01_00_000_0_11_0_0_0_0_0_0_0_0; // lui
ControlsD = `CTRLW'b0_000_00_00_000_0_00_0_0_0_0_0_0_00_1; // non-implemented instruction
7'b0110111: ControlsD = `CTRLW'b1_100_01_00_000_0_11_0_0_0_0_0_0_00_0; // lui
7'b0111011: if ((Funct7D == 7'b0000000 || Funct7D == 7'b0100000) && `XLEN == 64)
ControlsD = 22'b1_000_00_00_000_0_10_0_0_1_0_0_0_0_0; // R-type W instructions for RV64i
ControlsD = `CTRLW'b1_000_00_00_000_0_10_0_0_1_0_0_0_00_0; // R-type W instructions for RV64i
else if (Funct7D == 7'b0000001 && `M_SUPPORTED && `XLEN == 64)
ControlsD = 22'b1_000_00_00_100_0_00_0_0_1_0_0_1_0_0; // W-type Multiply/Divide
ControlsD = `CTRLW'b1_000_00_00_100_0_00_0_0_1_0_0_1_00_0; // W-type Multiply/Divide
else
ControlsD = 22'b0_000_00_00_000_0_00_0_0_0_0_0_0_0_1; // non-implemented instruction
7'b1100011: ControlsD = 22'b0_010_00_00_000_1_01_0_0_0_0_0_0_0_0; // beq
7'b1100111: ControlsD = 22'b1_000_00_00_010_0_00_1_1_0_0_0_0_0_0; // jalr
7'b1101111: ControlsD = 22'b1_011_00_00_010_0_00_1_0_0_0_0_0_0_0; // jal
ControlsD = `CTRLW'b0_000_00_00_000_0_00_0_0_0_0_0_0_00_1; // non-implemented instruction
7'b1100011: ControlsD = `CTRLW'b0_010_00_00_000_1_01_0_0_0_0_0_0_00_0; // beq
7'b1100111: ControlsD = `CTRLW'b1_000_00_00_010_0_00_1_1_0_0_0_0_00_0; // jalr
7'b1101111: ControlsD = `CTRLW'b1_011_00_00_010_0_00_1_0_0_0_0_0_00_0; // jal
7'b1110011: if (Funct3D == 3'b000)
ControlsD = 22'b0_000_00_00_000_0_00_0_0_0_0_1_0_0_0; // privileged; decoded further in priveleged modules
ControlsD = `CTRLW'b0_000_00_00_000_0_00_0_0_0_0_1_0_00_0; // privileged; decoded further in priveleged modules
else
ControlsD = 22'b1_000_00_00_011_0_00_0_0_0_1_0_0_0_0; // csrs
default: ControlsD = 22'b0_000_00_00_000_0_00_0_0_0_0_0_0_0_1; // non-implemented instruction
ControlsD = `CTRLW'b1_000_00_00_011_0_00_0_0_0_1_0_0_00_0; // csrs
default: ControlsD = `CTRLW'b0_000_00_00_000_0_00_0_0_0_0_0_0_00_1; // non-implemented instruction
endcase
endgenerate
@ -173,7 +174,7 @@ module controller(
endcase
// Execute stage pipeline control register and logic
flopenrc #(26) controlregE(clk, reset, FlushE, ~StallE,
flopenrc #(27) controlregE(clk, reset, FlushE, ~StallE,
{RegWriteD, ResultSrcD, MemRWD, JumpD, BranchD, ALUControlD, ALUSrcAD, ALUSrcBD, TargetSrcD, CSRReadD, CSRWriteD, PrivilegedD, Funct3D, W64D, MulDivD, AtomicD, 1'b1},
{RegWriteE, ResultSrcE, MemRWE, JumpE, BranchE, ALUControlE, ALUSrcAE, ALUSrcBE, TargetSrcE, CSRReadE, CSRWriteE, PrivilegedE, Funct3E, W64E, MulDivE, AtomicE, InstrValidE});
@ -196,7 +197,7 @@ module controller(
assign MemReadE = MemRWE[1];
// Memory stage pipeline control register
flopenrc #(14) controlregM(clk, reset, FlushM, ~StallM,
flopenrc #(15) controlregM(clk, reset, FlushM, ~StallM,
{RegWriteE, ResultSrcE, MemRWE, CSRReadE, CSRWriteE, PrivilegedE, Funct3E, AtomicE, InstrValidE},
{RegWriteM, ResultSrcM, MemRWM, CSRReadM, CSRWriteM, PrivilegedM, Funct3M, AtomicM, InstrValidM});

2
wally-pipelined/src/ieu/ieu.sv
View File

@ -43,7 +43,7 @@ module ieu (
input logic DataAccessFaultM,
input logic SquashSCW,
output logic [1:0] MemRWM,
output logic AtomicM,
output logic [1:0] AtomicM,
output logic [`XLEN-1:0] MemAdrM, WriteDataM,
output logic [`XLEN-1:0] SrcAM,
output logic [2:0] Funct3M,

8
wally-pipelined/src/ifu/ifu.sv
View File

@ -56,9 +56,8 @@ module ifu (
output logic [`XLEN-1:0] InstrMisalignedAdrM,
// TLB management
//input logic [`XLEN-1:0] PageTableEntryF,
input logic [`XLEN-1:0] SATP_REGW,
//input logic ITLBWriteF, ITLBFlushF,
// *** satp value will come from CSRs
// input logic [`XLEN-1:0] SATP,
output logic ITLBMissF, ITLBHitF,
// bogus
input logic [15:0] rd2
@ -74,14 +73,11 @@ module ifu (
logic [31:0] InstrF, InstrRawD, InstrE, InstrW;
logic [31:0] nop = 32'h00000013; // instruction for NOP
// *** temporary hack until we can figure out how to get actual satp value
// from priv unit -- Thomas F
logic [`XLEN-1:0] SATP = '0;
// *** temporary hack until walker is hooked up -- Thomas F
logic [`XLEN-1:0] PageTableEntryF = '0;
logic ITLBFlushF = '0;
logic ITLBWriteF = '0;
tlb #(3) itlb(clk, reset, SATP, PCF, PageTableEntryF, ITLBWriteF, ITLBFlushF,
tlb #(3) itlb(clk, reset, SATP_REGW, PCF, PageTableEntryF, ITLBWriteF, ITLBFlushF,
InstrPAdrF, ITLBMissF, ITLBHitF);
// branch predictor signals

54
wally-pipelined/src/mmu/tlb.sv
View File

@ -25,6 +25,7 @@
///////////////////////////////////////////
`include "wally-config.vh"
`include "wally-constants.vh"
/**
* sv32 specs
@ -57,7 +58,7 @@ module tlb #(parameter ENTRY_BITS = 3) (
input clk, reset,
// Current value of satp CSR (from privileged unit)
input [`XLEN-1:0] SATP, // *** How do we get this?
input [`XLEN-1:0] SATP_REGW,
// Virtual address input
input [`XLEN-1:0] VirtualAddress,
@ -75,32 +76,29 @@ module tlb #(parameter ENTRY_BITS = 3) (
output TLBHit
);
logic SvMode;
generate
if (`XLEN == 32) begin: ARCH
localparam VPN_BITS = 20;
localparam PPN_BITS = 22;
localparam PA_BITS = 34;
logic SvMode;
assign SvMode = SATP[31]; // *** change to an enum somehow?
end else begin: ARCH
localparam VPN_BITS = 27;
localparam PPN_BITS = 44;
localparam PA_BITS = 56;
logic SvMode; // currently just a boolean whether translation enabled
assign SvMode = SATP[63]; // *** change to an enum somehow?
if (`XLEN == 32) begin
assign SvMode = SATP_REGW[31]; // *** change to an enum somehow?
end else begin
assign SvMode = SATP_REGW[63]; // currently just a boolean whether translation enabled
end
endgenerate
// *** If we want to support multiple virtual memory modes (ie sv39 AND sv48),
// we could have some muxes that control which parameters are current.
// Although then some of the signals are not big enough. But that's a problem
// for much later.
// Index (currently random) to write the next TLB entry
logic [ENTRY_BITS-1:0] WriteIndex;
// Sections of the virtual and physical addresses
logic [ARCH.VPN_BITS-1:0] VirtualPageNumber;
logic [ARCH.PPN_BITS-1:0] PhysicalPageNumber;
logic [11:0] PageOffset;
logic [ARCH.PA_BITS-1:0] PhysicalAddressFull;
logic [`VPN_BITS-1:0] VirtualPageNumber;
logic [`PPN_BITS-1:0] PhysicalPageNumber;
logic [11:0] PageOffset;
logic [`PA_BITS-1:0] PhysicalAddressFull;
// Pattern and pattern location in the CAM
logic [ENTRY_BITS-1:0] VPNIndex;
@ -111,7 +109,7 @@ module tlb #(parameter ENTRY_BITS = 3) (
// Page table entry matching the virtual address
logic [`XLEN-1:0] PageTableEntry;
assign VirtualPageNumber = VirtualAddress[ARCH.VPN_BITS+11:12];
assign VirtualPageNumber = VirtualAddress[`VPN_BITS+11:12];
assign PageOffset = VirtualAddress[11:0];
// Choose a read or write location to the entry list
@ -121,28 +119,28 @@ module tlb #(parameter ENTRY_BITS = 3) (
tlb_rand rdm(.*);
tlb_ram #(ENTRY_BITS) ram(.*);
tlb_cam #(ENTRY_BITS, ARCH.VPN_BITS) cam(.*);
tlb_cam #(ENTRY_BITS, `VPN_BITS) cam(.*);
always_comb begin
assign PhysicalPageNumber = PageTableEntry[ARCH.PPN_BITS+9:10];
assign PhysicalPageNumber = PageTableEntry[`PPN_BITS+9:10];
if (TLBHit) begin
assign PhysicalAddressFull = {PhysicalPageNumber, PageOffset};
end else begin
assign PhysicalAddressFull = 8'b0; // *** Actual behavior; disabled until walker functioning
assign PhysicalAddressFull = '0; // *** Actual behavior; disabled until walker functioning
//assign PhysicalAddressFull = {2'b0, VirtualPageNumber, PageOffset} // *** pass through should be removed as soon as walker ready
end
end
generate
if (`XLEN == 32) begin
mux2 #(`XLEN) addressmux(VirtualAddress, PhysicalAddressFull[31:0], ARCH.SvMode, PhysicalAddress);
mux2 #(`XLEN) addressmux(VirtualAddress, PhysicalAddressFull[31:0], SvMode, PhysicalAddress);
end else begin
mux2 #(`XLEN) addressmux(VirtualAddress, {8'b0, PhysicalAddressFull}, ARCH.SvMode, PhysicalAddress);
mux2 #(`XLEN) addressmux(VirtualAddress, {8'b0, PhysicalAddressFull}, SvMode, PhysicalAddress);
end
endgenerate
assign TLBMiss = ~TLBHit & ~(TLBWrite | TLBFlush) & ARCH.SvMode;
assign TLBMiss = ~TLBHit & ~(TLBWrite | TLBFlush) & SvMode;
endmodule
module tlb_ram #(parameter ENTRY_BITS = 3) (
@ -217,13 +215,13 @@ module tlb_cam #(parameter ENTRY_BITS = 3,
initial begin
for (int i = 0; i < NENTRIES; i++)
ram[i] <= '0;
ram[i] = '0;
end
endmodule
module tlb_rand #(parameter ENTRY_BITS = 3) (
input clk, reset,
input clk, reset,
output [ENTRY_BITS-1:0] WriteIndex
);

2
wally-pipelined/src/privileged/csr.sv
View File

@ -40,6 +40,7 @@ module csr (
output logic STATUS_SPP, STATUS_TSR,
output logic [`XLEN-1:0] MEPC_REGW, SEPC_REGW, UEPC_REGW, UTVEC_REGW, STVEC_REGW, MTVEC_REGW,
output logic [`XLEN-1:0] MEDELEG_REGW, MIDELEG_REGW, SEDELEG_REGW, SIDELEG_REGW,
output logic [`XLEN-1:0] SATP_REGW,
output logic [11:0] MIP_REGW, MIE_REGW,
output logic STATUS_MIE, STATUS_SIE,
input logic [4:0] SetFflagsM,
@ -126,6 +127,7 @@ module csr (
assign MIDELEG_REGW = 0;
assign SEDELEG_REGW = 0;
assign SIDELEG_REGW = 0;
assign SATP_REGW = 0;
assign MIP_REGW = 0;
assign MIE_REGW = 0;
assign STATUS_MIE = 0;

4
wally-pipelined/src/privileged/csrs.sv
View File

@ -48,6 +48,7 @@ module csrs #(parameter
output logic [`XLEN-1:0] CSRSReadValM, SEPC_REGW, STVEC_REGW,
output logic [31:0] SCOUNTEREN_REGW,
output logic [`XLEN-1:0] SEDELEG_REGW, SIDELEG_REGW,
output logic [`XLEN-1:0] SATP_REGW,
input logic [11:0] SIP_REGW, SIE_REGW,
output logic WriteSSTATUSM,
output logic IllegalCSRSAccessM
@ -63,7 +64,7 @@ module csrs #(parameter
logic WriteSTVECM;
logic WriteSSCRATCHM, WriteSEPCM;
logic WriteSCAUSEM, WriteSTVALM, WriteSATPM, WriteSCOUNTERENM;
logic [`XLEN-1:0] SSCRATCH_REGW, SCAUSE_REGW, STVAL_REGW, SATP_REGW;
logic [`XLEN-1:0] SSCRATCH_REGW, SCAUSE_REGW, STVAL_REGW;
assign WriteSSTATUSM = CSRSWriteM && (CSRAdrM == SSTATUS);
assign WriteSTVECM = CSRSWriteM && (CSRAdrM == STVEC);
@ -127,6 +128,7 @@ module csrs #(parameter
assign SEDELEG_REGW = 0;
assign SIDELEG_REGW = 0;
assign SCOUNTEREN_REGW = 0;
assign SATP_REGW = 0;
assign IllegalCSRSAccessM = 1;
end
endgenerate

1
wally-pipelined/src/privileged/privileged.sv
View File

@ -44,6 +44,7 @@ module privileged (
input logic TimerIntM, ExtIntM, SwIntM,
input logic [`XLEN-1:0] InstrMisalignedAdrM, MemAdrM,
input logic [4:0] SetFflagsM,
output logic [`XLEN-1:0] SATP_REGW,
output logic [2:0] FRM_REGW,
input logic FlushD, FlushE, FlushM, StallD, StallW
);

2
wally-pipelined/src/uncore/dtim.sv
View File

@ -59,7 +59,7 @@ module dtim #(parameter BASE=0, RANGE = 65535) (
busycount <= 0;
HREADYTim <= #1 0;
end else if (~HREADYTim) begin
if (busycount == 2) begin // TIM latency, for testing purposes
if (busycount == 2) begin // TIM latency, for testing purposes. *** test with different values
HREADYTim <= #1 1;
end else begin
busycount <= busycount + 1;

10
wally-pipelined/src/wally/wallypipelinedhart.sv
View File

@ -60,7 +60,8 @@ module wallypipelinedhart (
// new signals that must connect through DP
logic MulDivE, W64E;
logic CSRReadM, CSRWriteM, PrivilegedM, AtomicM;
logic CSRReadM, CSRWriteM, PrivilegedM;
logic [1:0] AtomicM;
logic [`XLEN-1:0] SrcAE, SrcBE;
logic [`XLEN-1:0] SrcAM;
logic [2:0] Funct3E;
@ -88,8 +89,12 @@ module wallypipelinedhart (
logic SquashSCW;
// memory management unit signals
logic ITLBWriteF, DTLBWriteM;
logic ITLBMissF, ITLBHitF;
logic DTLBMissM, DTLBHitM;
logic [`XLEN-1:0] SATP_REGW;
logic [`XLEN-1:0] PageTableEntryF, PageTableEntryM;
// bus interface to dmem
logic MemReadM, MemWriteM;
@ -113,8 +118,11 @@ module wallypipelinedhart (
//.InstrReadF(1'b0),
//.InstrRData(InstrF), // hook up InstrF later
.MemSizeM(Funct3M[1:0]), .UnsignedLoadM(Funct3M[2]),
.Funct7M(InstrM[31:25]),
.*);
// walker walker(.*); *** // can send addresses to ahblite, send out pagetablestall
// *** can connect to hazard unit
// changing from this to the line above breaks the program. auipc at 104 fails; seems to be flushed.
// Would need to insertinstruction as InstrD, not InstrF
/*ahblite ebu(

2
wally-pipelined/testbench/testbench-busybear.sv
View File

@ -294,7 +294,7 @@ module testbench_busybear();
`CHECK_CSR(MTVEC)
//`CHECK_CSR2(PMPADDR0, `CSRM)
//`CHECK_CSR2(PMdut.PCFG0, `CSRM)
`CHECK_CSR2(SATP, `CSRS)
`CHECK_CSR(SATP)
`CHECK_CSR2(SCAUSE, `CSRS)
`CHECK_CSR(SCOUNTEREN)
`CHECK_CSR(SEPC)

8
wally-pipelined/testbench/testbench-imperas.sv
View File

@ -43,6 +43,7 @@ module testbench();
//logic [31:0] InstrW;
logic [`XLEN-1:0] meminit;
string tests64a[] = '{
"rv64a/WALLY-AMO", "2110",
"rv64a/WALLY-LRSC", "2110"
};
string tests64m[] = '{
@ -195,6 +196,10 @@ string tests64iNOc[] = {
"rv64i/WALLY-CSRRCI", "4000"
};
string tests32a[] = '{
"rv64a/WALLY-AMO", "2110",
"rv64a/WALLY-LRSC", "2110"
};
string tests32m[] = '{
"rv32m/I-MUL-01", "2000",
"rv32m/I-MULH-01", "2000",
@ -334,13 +339,14 @@ string tests32i[] = {
if (`C_SUPPORTED) tests = {tests, tests64ic};
else tests = {tests, tests64iNOc};
if (`M_SUPPORTED) tests = {tests, tests64m};
if (`A_SUPPORTED) tests = {tests64a, tests};
if (`A_SUPPORTED) tests = {tests, tests64a};
// tests = {tests64a, tests};
end else begin // RV32
tests = {tests32i};
if (`C_SUPPORTED % 2 == 1) tests = {tests, tests32ic};
else tests = {tests, tests32iNOc};
if (`M_SUPPORTED % 2 == 1) tests = {tests, tests32m};
if (`A_SUPPORTED) tests = {tests, tests32a};
end
string signame, memfilename;