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[/] [theia_gpu/] [branches/] [beta_2.0/] [rtl/] [Unit_Control.v] - Blame information for rev 213

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`include "aDefinitions.v"
 
`define CU_STATE_AFTER_RESET       0
`define CU_STATE_WAIT_FOR_CP       1
`define CU_STATE_HANDLE_CP_REQUEST 2
`define CU_STATE_START_MAIN_THREAD 3
`define CU_STATE_STOP_MAIN_THREAD  4
 
module ControlUnit
(
input wire                          Clock,
input wire                          Reset,
input wire [`CBC_BUS_WIDTH-1:0]     iCpCommand,
input wire [`VPID_WIDTH-1:0]        iVPID,
output wire                         oVpEnabled,
output wire                         oBusy
);
 
 
 
reg [4:0]                      rCurrentState, rNextState;
wire                           wRequestDetected;
reg                            rPopFifo;
reg                            rToggleVpEnabled;
wire [`CBC_BUS_WIDTH-1:0]      wCurrentRequest;
 
 
assign wRequestDetected = (iCpCommand[`CP_MSG_BCAST] || (iCpCommand[`CP_MSG_DST_RNG] == iVPID) ) ? 1'b1 : 1'b0;
 
//Incomming requests are stored in the FIFO
sync_fifo  # (`CBC_BUS_WIDTH,8 ) IN_FIFO
(
 .clk(    Clock              ),
 .reset(  Reset              ),
 .din(    iCpCommand         ),
 .wr_en(  wRequestDetected   ),
 .rd_en(  rPopFifo           ),
 .dout(   wCurrentRequest    ),
 .full(   oBusy              )
 
);
 
 
UPCOUNTER_POSEDGE # (1) UP1
(
.Clock(      Clock                                      ),
.Reset(      Reset                                      ),
.Initial(    1'b0                                       ),
.Enable(     rToggleVpEnabled                           ),
.Q(          oVpEnabled                                 )
);
 
//Next states logic and Reset sequence
always @(posedge Clock )
  begin
 
    if (Reset )
                rCurrentState <= `CU_STATE_AFTER_RESET;
    else
                rCurrentState <= rNextState;
 
end
 
 
 
 
always @ ( * )
begin
        case (rCurrentState)
        //--------------------------------------
        `CU_STATE_AFTER_RESET:
        begin
           rPopFifo         = 1'b0;
                rToggleVpEnabled = 1'b0;
 
                rNextState = `CU_STATE_WAIT_FOR_CP;
        end
        //--------------------------------------
        `CU_STATE_WAIT_FOR_CP:
        begin
                rPopFifo         = 1'b0;
                rToggleVpEnabled = 1'b0;
 
                if ( wRequestDetected )
                        rNextState = `CU_STATE_HANDLE_CP_REQUEST;
                else
                        rNextState = `CU_STATE_WAIT_FOR_CP;
        end
        //--------------------------------------
        `CU_STATE_HANDLE_CP_REQUEST:
        begin
                rPopFifo         = 1'b0;
                rToggleVpEnabled = 1'b0;
 
                case ( wCurrentRequest[`CP_MSG_OPERATION_RNG] )
                        `VP_COMMAND_START_MAIN_THREAD: rNextState = `CU_STATE_START_MAIN_THREAD;
                        `VP_COMMAND_STOP_MAIN_THREAD:  rNextState = `CU_STATE_STOP_MAIN_THREAD;
                default:
                        rNextState = `CU_STATE_WAIT_FOR_CP;
                endcase
 
 
        end
        //--------------------------------------
        `CU_STATE_START_MAIN_THREAD:
        begin
                rPopFifo         = 1'b0;
                rToggleVpEnabled = ~oVpEnabled;
 
 
                rNextState = `CU_STATE_WAIT_FOR_CP;
        end
        //--------------------------------------
        `CU_STATE_STOP_MAIN_THREAD:
        begin
                rPopFifo         = 1'b0;
                rToggleVpEnabled = oVpEnabled;
 
 
                rNextState = `CU_STATE_WAIT_FOR_CP;
        end
        //--------------------------------------
        default:
        begin
                rPopFifo         = 1'b0;
                rToggleVpEnabled = 1'b0;
 
                rNextState = `CU_STATE_AFTER_RESET;
        end
        //--------------------------------------
endcase
end //always
endmodule

Line No.	Rev	Author	Line
1	213	diegovalve	`include "aDefinitions.v"
2
3			`define CU_STATE_AFTER_RESET 0
4			`define CU_STATE_WAIT_FOR_CP 1
5			`define CU_STATE_HANDLE_CP_REQUEST 2
6			`define CU_STATE_START_MAIN_THREAD 3
7			`define CU_STATE_STOP_MAIN_THREAD 4
8
9			`module ControlUnit`
10			`(`
11			`input wire Clock,`
12			`input wire Reset,`
13			input wire [`CBC_BUS_WIDTH-1:0] iCpCommand,
14			input wire [`VPID_WIDTH-1:0] iVPID,
15			`output wire oVpEnabled,`
16			`output wire oBusy`
17			`);`
18
19
20
21			`reg [4:0] rCurrentState, rNextState;`
22			`wire wRequestDetected;`
23			`reg rPopFifo;`
24			`reg rToggleVpEnabled;`
25			wire [`CBC_BUS_WIDTH-1:0] wCurrentRequest;
26
27
28			assign wRequestDetected = (iCpCommand[`CP_MSG_BCAST] \|\| (iCpCommand[`CP_MSG_DST_RNG] == iVPID) ) ? 1'b1 : 1'b0;
29
30			`//Incomming requests are stored in the FIFO`
31			sync_fifo # (`CBC_BUS_WIDTH,8 ) IN_FIFO
32			`(`
33			`.clk( Clock ),`
34			`.reset( Reset ),`
35			`.din( iCpCommand ),`
36			`.wr_en( wRequestDetected ),`
37			`.rd_en( rPopFifo ),`
38			`.dout( wCurrentRequest ),`
39			`.full( oBusy )`
40
41			`);`
42
43
44			`UPCOUNTER_POSEDGE # (1) UP1`
45			`(`
46			`.Clock( Clock ),`
47			`.Reset( Reset ),`
48			`.Initial( 1'b0 ),`
49			`.Enable( rToggleVpEnabled ),`
50			`.Q( oVpEnabled )`
51			`);`
52
53			`//Next states logic and Reset sequence`
54			`always @(posedge Clock )`
55			`begin`
56
57			`if (Reset )`
58			rCurrentState <= `CU_STATE_AFTER_RESET;
59			`else`
60			`rCurrentState <= rNextState;`
61
62			`end`
63
64
65
66
67			`always @ ( * )`
68			`begin`
69			`case (rCurrentState)`
70			`//--------------------------------------`
71			`CU_STATE_AFTER_RESET:
72			`begin`
73			`rPopFifo = 1'b0;`
74			`rToggleVpEnabled = 1'b0;`
75
76			rNextState = `CU_STATE_WAIT_FOR_CP;
77			`end`
78			`//--------------------------------------`
79			`CU_STATE_WAIT_FOR_CP:
80			`begin`
81			`rPopFifo = 1'b0;`
82			`rToggleVpEnabled = 1'b0;`
83
84			`if ( wRequestDetected )`
85			rNextState = `CU_STATE_HANDLE_CP_REQUEST;
86			`else`
87			rNextState = `CU_STATE_WAIT_FOR_CP;
88			`end`
89			`//--------------------------------------`
90			`CU_STATE_HANDLE_CP_REQUEST:
91			`begin`
92			`rPopFifo = 1'b0;`
93			`rToggleVpEnabled = 1'b0;`
94
95			case ( wCurrentRequest[`CP_MSG_OPERATION_RNG] )
96			`VP_COMMAND_START_MAIN_THREAD: rNextState = `CU_STATE_START_MAIN_THREAD;
97			`VP_COMMAND_STOP_MAIN_THREAD: rNextState = `CU_STATE_STOP_MAIN_THREAD;
98			`default:`
99			rNextState = `CU_STATE_WAIT_FOR_CP;
100			`endcase`
101
102
103			`end`
104			`//--------------------------------------`
105			`CU_STATE_START_MAIN_THREAD:
106			`begin`
107			`rPopFifo = 1'b0;`
108			`rToggleVpEnabled = ~oVpEnabled;`
109
110
111			rNextState = `CU_STATE_WAIT_FOR_CP;
112			`end`
113			`//--------------------------------------`
114			`CU_STATE_STOP_MAIN_THREAD:
115			`begin`
116			`rPopFifo = 1'b0;`
117			`rToggleVpEnabled = oVpEnabled;`
118
119
120			rNextState = `CU_STATE_WAIT_FOR_CP;
121			`end`
122			`//--------------------------------------`
123			`default:`
124			`begin`
125			`rPopFifo = 1'b0;`
126			`rToggleVpEnabled = 1'b0;`
127
128			rNextState = `CU_STATE_AFTER_RESET;
129			`end`
130			`//--------------------------------------`
131			`endcase`
132			`end //always`
133			`endmodule`

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[/] [theia_gpu/] [branches/] [beta_2.0/] [rtl/] [Unit_Control.v] - Blame information for rev 213