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Rework cpuif to support transaction pipelining. Add more docs. update simulator

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This commit is contained in:
Alex Mykyta
2022-02-13 17:25:31 -08:00
parent de5eecf0e7
commit d0ba488904
21 changed files with 493 additions and 68 deletions
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30
test/lib/cpuifs/axi4lite/axi4lite_intf_driver.sv
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@@ -77,7 +77,7 @@ interface axi4lite_intf_driver #(
input RRESP;
endclocking
task reset();
task automatic reset();
cb.AWVALID <= '0;
cb.AWADDR <= '0;
cb.AWPROT <= '0;
@@ -95,13 +95,20 @@ interface axi4lite_intf_driver #(
@cb;
end
task write(logic [ADDR_WIDTH-1:0] addr, logic [DATA_WIDTH-1:0] data);
semaphore txn_aw_mutex = new(1);
semaphore txn_w_mutex = new(1);
semaphore txn_b_mutex = new(1);
semaphore txn_ar_mutex = new(1);
semaphore txn_r_mutex = new(1);
task automatic write(logic [ADDR_WIDTH-1:0] addr, logic [DATA_WIDTH-1:0] data);
bit w_before_aw;
w_before_aw = $urandom_range(1,0);
##0;
fork
begin
txn_aw_mutex.get();
##0;
if(w_before_aw) repeat($urandom_range(2,0)) @cb;
cb.AWVALID <= '1;
cb.AWADDR <= addr;
@@ -109,9 +116,12 @@ interface axi4lite_intf_driver #(
@(cb);
while(cb.AWREADY !== 1'b1) @(cb);
cb.AWVALID <= '0;
txn_aw_mutex.put();
end
begin
txn_w_mutex.get();
##0;
if(!w_before_aw) repeat($urandom_range(2,0)) @cb;
cb.WVALID <= '1;
cb.WDATA <= data;
@@ -120,39 +130,47 @@ interface axi4lite_intf_driver #(
while(cb.WREADY !== 1'b1) @(cb);
cb.WVALID <= '0;
cb.WSTRB <= '0;
txn_w_mutex.put();
end
begin
txn_b_mutex.get();
@cb;
while(cb.BREADY !== 1'b1 && cb.BVALID !== 1'b1) @(cb);
assert(!$isunknown(cb.BRESP)) else $error("Read from 0x%0x returned X's on BRESP", addr);
txn_b_mutex.put();
end
join
endtask
task read(logic [ADDR_WIDTH-1:0] addr, output logic [DATA_WIDTH-1:0] data);
##0;
task automatic read(logic [ADDR_WIDTH-1:0] addr, output logic [DATA_WIDTH-1:0] data);
fork
begin
txn_ar_mutex.get();
##0;
cb.ARVALID <= '1;
cb.ARADDR <= addr;
cb.ARPROT <= '0;
@(cb);
while(cb.ARREADY !== 1'b1) @(cb);
cb.ARVALID <= '0;
txn_ar_mutex.put();
end
begin
txn_r_mutex.get();
@cb;
while(!(cb.RREADY === 1'b1 && cb.RVALID === 1'b1)) @(cb);
assert(!$isunknown(cb.RDATA)) else $error("Read from 0x%0x returned X's on RDATA", addr);
assert(!$isunknown(cb.RRESP)) else $error("Read from 0x%0x returned X's on RRESP", addr);
data = cb.RDATA;
txn_r_mutex.put();
end
join
endtask
task assert_read(logic [ADDR_WIDTH-1:0] addr, logic [DATA_WIDTH-1:0] expected_data, logic [DATA_WIDTH-1:0] mask = '1);
task automatic assert_read(logic [ADDR_WIDTH-1:0] addr, logic [DATA_WIDTH-1:0] expected_data, logic [DATA_WIDTH-1:0] mask = '1);
logic [DATA_WIDTH-1:0] data;
read(addr, data);
data &= mask;