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Stall bus memory when reset is high
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@ -1,5 +1,6 @@
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module mips_cpu_bus_memory( //Avalon memory mapped bus controller (slave)
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module mips_cpu_bus_memory( //Avalon memory mapped bus controller (slave)
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input logic clk,
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input logic clk,
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input logic reset,
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input logic[31:0] address,
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input logic[31:0] address,
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input logic write,
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input logic write,
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input logic read,
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input logic read,
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@ -43,10 +44,20 @@ initial begin
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for (integer i = 0; i<$size(data_memory); i++) begin //Read out data contents to log
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for (integer i = 0; i<$size(data_memory); i++) begin //Read out data contents to log
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$display("byte +%h: %h", 32'h00001000+i*4, data_memory[i]);
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$display("byte +%h: %h", 32'h00001000+i*4, data_memory[i]);
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end
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end
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waitrequest = 1'b0; // set waitrequest low to begin
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readdata = 32'h00000000; // set readdata low to begin
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end
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always_comb begin
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if (reset) begin
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waitrequest = 1'b0;
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end
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end
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end
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always_ff @(posedge read or posedge write) begin
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always_ff @(posedge read or posedge write) begin
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waitrequest <= 1;
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waitrequest <= 1'b1;
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end
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end
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always_ff @(posedge clk) begin
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always_ff @(posedge clk) begin
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@ -86,5 +97,4 @@ always_ff @(posedge clk) begin
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end
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end
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end
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end
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endmodule
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endmodule
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@ -10,6 +10,7 @@ logic[3:0] byteenable;
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mips_cpu_bus_memory #(INSTR_INIT_FILE, DATA_INIT_FILE) memInst( //Avalon memory mapped bus controller (slave)
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mips_cpu_bus_memory #(INSTR_INIT_FILE, DATA_INIT_FILE) memInst( //Avalon memory mapped bus controller (slave)
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.clk(clk), // clk input to mem
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.clk(clk), // clk input to mem
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.reset(reset), // reset input to stall mem during cpu reset
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.address(address), // addr input to mem
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.address(address), // addr input to mem
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.write(write), // write flag input
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.write(write), // write flag input
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.read(read), // read flag input
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.read(read), // read flag input
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