148 lines
4.8 KiB
Systemverilog
148 lines
4.8 KiB
Systemverilog
{% extends "lib/tb_base.sv" %}
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{% block seq %}
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{% sv_line_anchor %}
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##1;
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cb.rst <= '0;
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##1;
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//--------------------------------------------------------------------------
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// Test simple counters
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//--------------------------------------------------------------------------
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// up
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cpuif.assert_read('h0, 'hD, 'h000F);
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cb.hwif_in.simple.implied_up.incr <= '1;
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repeat(4) @cb;
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cb.hwif_in.simple.implied_up.incr <= '0;
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cpuif.assert_read('h0, 'h1, 'h000F);
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// up
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cpuif.assert_read('h0, 'hD0, 'h00F0);
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cb.hwif_in.simple.up.incr <= '1;
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repeat(4) @cb;
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cb.hwif_in.simple.up.incr <= '0;
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cpuif.assert_read('h0, 'h10, 'h00F0);
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// down
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cpuif.assert_read('h0, 'h400, 'h0F00);
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cb.hwif_in.simple.down.decr <= '1;
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repeat(6) @cb;
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cb.hwif_in.simple.down.decr <= '0;
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cpuif.assert_read('h0, 'hE00, 'h0F00);
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// up/down via hw
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cpuif.assert_read('h0, 'h0000, 'hF000);
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cb.hwif_in.simple.updown.incr <= '1;
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repeat(6) @cb;
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cb.hwif_in.simple.updown.incr <= '0;
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cpuif.assert_read('h0, 'h6000, 'hF000);
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cb.hwif_in.simple.updown.decr <= '1;
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repeat(6) @cb;
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cb.hwif_in.simple.updown.decr <= '0;
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cpuif.assert_read('h0, 'h0000, 'hF000);
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cb.hwif_in.simple.updown.decr <= '1;
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repeat(6) @cb;
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cb.hwif_in.simple.updown.decr <= '0;
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cpuif.assert_read('h0, 'hA000, 'hF000);
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cb.hwif_in.simple.updown.incr <= '1;
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repeat(6) @cb;
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cb.hwif_in.simple.updown.incr <= '0;
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cpuif.assert_read('h0, 'h0000, 'hF000);
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// up/down external underflow
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fork
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begin
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##0;
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forever begin
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assert(cb.hwif_out.simple.updown.value == 0);
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if(cb.hwif_out.simple.updown.underflow) break;
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@cb;
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end
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@cb;
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forever begin
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assert(cb.hwif_out.simple.updown.value == 15);
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assert(cb.hwif_out.simple.updown.underflow == 0);
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@cb;
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end
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end
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begin
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repeat(2) @cb;
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cb.hwif_in.simple.updown.decr <= '1;
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@cb;
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cb.hwif_in.simple.updown.decr <= '0;
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repeat(2) @cb;
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end
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join_any
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disable fork;
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// up/down external overflow
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fork
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begin
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##0;
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forever begin
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assert(cb.hwif_out.simple.updown.value == 15);
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if(cb.hwif_out.simple.updown.overflow) break;
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@cb;
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end
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@cb;
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forever begin
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assert(cb.hwif_out.simple.updown.value == 0);
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assert(cb.hwif_out.simple.updown.overflow == 0);
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@cb;
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end
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end
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begin
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repeat(2) @cb;
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cb.hwif_in.simple.updown.incr <= '1;
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@cb;
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cb.hwif_in.simple.updown.incr <= '0;
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repeat(2) @cb;
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end
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join_any
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disable fork;
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// up/down via sw
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cpuif.assert_read('h0, 'h00000, 'hF0000);
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repeat(3) cpuif.write('h0, 'h4000_0000); // incr
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cpuif.assert_read('h0, 'h90000, 'hF0000);
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repeat(3) cpuif.write('h0, 'h8000_0000); // decr
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cpuif.assert_read('h0, 'h00000, 'hF0000);
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repeat(3) cpuif.write('h0, 'h8000_0000); // decr
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cpuif.assert_read('h0, 'h70000, 'hF0000);
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repeat(3) cpuif.write('h0, 'h4000_0000); // incr
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cpuif.assert_read('h0, 'h00000, 'hF0000);
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// up/down via hw + external dynamic stepsize
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cpuif.assert_read('h0, 'h000000, 'hF00000);
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cb.hwif_in.simple.updown3.incrvalue <= 'h2;
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repeat(3) cpuif.write('h0, 'h4000_0000); // incr
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cpuif.assert_read('h0, 'h600000, 'hF00000);
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cpuif.assert_read('h4, 'h00_00); // no overflows or underflows
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cb.hwif_in.simple.updown3.decrvalue <= 'h3;
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repeat(3) cpuif.write('h0, 'h8000_0000); // decr
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cpuif.assert_read('h0, 'hD00000, 'hF00000);
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cpuif.assert_read('h4, 'h01_00); // one underflow
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cb.hwif_in.simple.updown3.incrvalue <= 'h1;
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repeat(2) cpuif.write('h0, 'h4000_0000); // incr
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cpuif.assert_read('h0, 'hF00000, 'hF00000);
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cpuif.assert_read('h4, 'h00_00); // no overflows or underflows
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repeat(1) cpuif.write('h0, 'h4000_0000); // incr
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cpuif.assert_read('h0, 'h000000, 'hF00000);
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cpuif.assert_read('h4, 'h00_01); // one overflow
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repeat(32) cpuif.write('h0, 'h4000_0000); // incr
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cpuif.assert_read('h0, 'h000000, 'hF00000);
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cpuif.assert_read('h4, 'h00_02); // overflow
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// up/down via hw + referenced dynamic stepsize
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cpuif.assert_read('h0, 'h0000000, 'hF000000);
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repeat(4) cpuif.write('h0, 'h4000_0000 + (2'h3 << 28)); // + 3
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cpuif.assert_read('h0, 'hC000000, 'hF000000);
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repeat(4) cpuif.write('h0, 'h8000_0000 + (2'h1 << 28)); // - 1
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cpuif.assert_read('h0, 'h8000000, 'hF000000);
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repeat(2) cpuif.write('h0, 'h8000_0000 + (2'h3 << 28)); // - 3
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cpuif.assert_read('h0, 'h2000000, 'hF000000);
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{% endblock %}
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