You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
171 lines
3.1 KiB
171 lines
3.1 KiB
module properties (
|
|
input Reset_n_i,
|
|
input Clk_i,
|
|
input [7:0] Din_i,
|
|
input DinValid_i,
|
|
input DinStart_i,
|
|
input DinStop_i,
|
|
input DinAccept_o,
|
|
input [7:0] Dout_o,
|
|
input DoutValid_o,
|
|
input DoutStart_o,
|
|
input DoutStop_o,
|
|
input DoutAccept_i,
|
|
// Internals
|
|
input [2:0] s_fsm_state,
|
|
input [7:0] s_header
|
|
);
|
|
|
|
|
|
|
|
`define READ 0
|
|
`define WRITE 1
|
|
|
|
|
|
reg init_state = 1;
|
|
|
|
// Initial reset
|
|
always @(*) begin
|
|
if (init_state) assume (!Reset_n_i);
|
|
if (!init_state) assume (Reset_n_i);
|
|
end
|
|
|
|
always @(posedge Clk_i)
|
|
init_state = 0;
|
|
|
|
default clocking
|
|
@(posedge Clk_i);
|
|
endclocking
|
|
|
|
|
|
// Constraints
|
|
|
|
assume property (
|
|
DinValid_i && !DinAccept_o |=>
|
|
$stable(Din_i)
|
|
);
|
|
|
|
assume property (
|
|
DinValid_i && !DinAccept_o |=>
|
|
$stable(DinStart_i)
|
|
);
|
|
|
|
assume property (
|
|
DinValid_i && !DinAccept_o |=>
|
|
$stable(DinStop_i)
|
|
);
|
|
|
|
|
|
// Asserts
|
|
|
|
assert property (
|
|
s_fsm_state >= 0 && s_fsm_state <= 6
|
|
);
|
|
|
|
assert property (
|
|
DoutStart_o |->
|
|
DoutValid_o
|
|
);
|
|
|
|
assert property (
|
|
DoutStart_o && DoutAccept_i |=>
|
|
!DoutStart_o
|
|
);
|
|
|
|
assert property (
|
|
DoutStop_o |->
|
|
DoutValid_o
|
|
);
|
|
|
|
assert property (
|
|
DoutStop_o && DoutAccept_i |=>
|
|
!DoutStop_o
|
|
);
|
|
|
|
assert property (
|
|
s_fsm_state == 1 && DinValid_i && DinStart_i && DinAccept_o |=>
|
|
s_header == $past(Din_i)
|
|
);
|
|
|
|
|
|
// State changes
|
|
|
|
assert property (disable iff (!Reset_n_i)
|
|
s_fsm_state == 0 |=> s_fsm_state == 1
|
|
);
|
|
|
|
assert property (disable iff (!Reset_n_i)
|
|
s_fsm_state == 1 && DinValid_i && DinStart_i && DinStop_i && Din_i[3:0] == `READ |=>
|
|
s_fsm_state == 2
|
|
);
|
|
|
|
assert property (disable iff (!Reset_n_i)
|
|
s_fsm_state == 1 && DinValid_i && DinStart_i && !DinStop_i && Din_i[3:0] == `WRITE |=>
|
|
s_fsm_state == 3
|
|
);
|
|
|
|
assert property (disable iff (!Reset_n_i)
|
|
s_fsm_state == 2 |=> s_fsm_state == 4
|
|
);
|
|
|
|
assert property (disable iff (!Reset_n_i)
|
|
s_fsm_state == 4 && DoutValid_o && DoutAccept_i && s_header[3:0] == `READ |=> s_fsm_state == 5
|
|
);
|
|
|
|
assert property (disable iff (!Reset_n_i)
|
|
s_fsm_state == 4 && DoutValid_o && DoutAccept_i && s_header[3:0] != `READ |=> s_fsm_state == 6
|
|
);
|
|
|
|
assert property (disable iff (!Reset_n_i)
|
|
s_fsm_state == 6 && DoutValid_o && DoutAccept_i |=> s_fsm_state == 0
|
|
);
|
|
|
|
|
|
// Protocol checks
|
|
|
|
assert property (
|
|
s_fsm_state > 1 |->
|
|
s_header[3:0] inside {`READ, `WRITE}
|
|
);
|
|
|
|
assert property (
|
|
DoutStart_o && DoutValid_o |->
|
|
Dout_o[3:0] == s_header[3:0]
|
|
);
|
|
|
|
assert property (
|
|
DoutValid_o && !DoutAccept_i |=>
|
|
$stable(Dout_o)
|
|
);
|
|
|
|
assert property (
|
|
DoutValid_o && !DoutAccept_i |=>
|
|
$stable(DoutStart_o)
|
|
);
|
|
|
|
assert property (
|
|
DoutValid_o && !DoutAccept_i |=>
|
|
$stable(DoutStop_o)
|
|
);
|
|
|
|
assert property (
|
|
DoutValid_o |-> !(DoutStart_o && DoutStop_o)
|
|
);
|
|
|
|
assert property (
|
|
DoutStart_o |-> s_fsm_state == 4
|
|
);
|
|
|
|
assert property (
|
|
DoutStop_o |-> s_fsm_state == 6
|
|
);
|
|
|
|
assert property (
|
|
DoutValid_o |-> s_fsm_state >= 4 && s_fsm_state <= 6
|
|
);
|
|
|
|
|
|
endmodule
|
|
|
|
|
|
bind vai_reg properties properties (.*);
|