Subversion Repositories theia_gpu

/**********************************************************************************

Theia, Ray Cast Programable graphic Processing Unit.

Copyright (C) 2010  Diego Valverde (diego.valverde.g@gmail.com)

This program is free software; you can redistribute it and/or

modify it under the terms of the GNU General Public License

as published by the Free Software Foundation; either version 2

of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

GNU General Public License for more details.

You should have received a copy of the GNU General Public License

along with this program; if not, write to the Free Software

Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

***********************************************************************************/

/*******************************************************************************

Module Description:

This is the Main test bench of the GPU. It simulates the behavior of

an external control unit or CPU that sends configuration information into DUT.

It also implements a second processs that simulates a Wishbone slave that sends

data from an external memory. These blocks are just behavioral CTE and therefore

are not meant to be synthethized.

*******************************************************************************/

`timescale 1ns / 1ps

`include "aDefinitions.v"

`define RESOLUTION_WIDTH                                                        (rSceneParameters[13] >> `SCALE)

`define RESOLUTION_HEIGHT                                                       (rSceneParameters[14] >> `SCALE)

`define DELTA_ROW                                                                       (32'h1 << `SCALE)

`define DELTA_COL                                                                       (32'h1 << `SCALE)

`define TEXTURE_BUFFER_SIZE                                             (256*256*3)

`define MAX_WIDTH                                                                       200

`define MAX_SCREENBUFFER                                                        (`MAX_WIDTH*`MAX_WIDTH*3)

module TestBench_Theia;

        //------------------------------------------------------------------------

        //**WARNING: Declare all of your varaibles at the begining

        //of the file. I hve noticed that sometimes the verilog

        //simulator allows you to use some regs even if they have not been 

        //previously declared, leadeing to crahses or unexpected behavior

        // Inputs

        reg Clock;

        reg Reset;

        wire [`WB_WIDTH-1:0]             DAT_O;

        reg                                                             ACK_O;

        wire                                                            ACK_I;

        wire [`WB_WIDTH-1:0]             ADR_I,ADR_O;

        wire                                                            WE_I,STB_I;

        wire                                                            CYC_O,WE_O,TGC_O,STB_O;

        wire [1:0]                                               TGA_O;

        wire [1:0]                                               TGA_I;

        reg [`WB_WIDTH-1:0]                      TMADR_O,TMDAT_O;

        reg [`MAX_TMEM_BANKS-1:0]        TMSEL_O;

        reg                                                             TMWE_O;

        reg [31:0]                                               rControlRegister[2:0];

        integer                                                         file, log;

        reg [31:0] rSceneParameters[120:0];

        reg [31:0]                                               rVertexBuffer[7000:0];

        reg [31:0]                                               rInstructionBuffer[512:0];

        reg [31:0]                                       rTextures[`TEXTURE_BUFFER_SIZE:0];               //Lets asume we use 256*256 textures

        reg [7:0]                                                rScreen[`MAX_SCREENBUFFER-1:0];

        wire [`MAX_CORES-1:0]            wCoreSelect;

        wire [3:0]                                               CYC_I,GNT_O;

        wire                                                            MST_O;

        wire                                                            wDone;

        wire [`MAX_CORES-1:0]            RENDREN_O;

        reg [`MAX_CORE_BITS-1:0]         wOMEMBankSelect;

        reg [`WB_WIDTH-1:0]                      wOMEMReadAddr;  //Output adress (relative to current bank)

        wire [`WB_WIDTH-1:0]       wOMEMData;            //Output data bus (Wishbone)

        reg                                                             rHostEnable;

        integer                                                 k,out2;

        wire GRDY_I;

        wire GACK_O;

        wire STDONE_O;

        wire wGPUCommitedResults;

        wire wHostDataAvailable;

THEIA GPU

                (

                .CLK_I( Clock ),

                .RST_I( Reset ),

                .RENDREN_I( RENDREN_O ),

                .DAT_I( DAT_O ),

                .ACK_I( ACK_O ),

                .CYC_I( CYC_O ),

                .MST_I( MST_O ),

                .TGA_I( TGA_O ),

                .ACK_O( ACK_I ),

                .ADR_I( ADR_O ),

                .WE_I(  WE_O  ),

                .SEL_I( wCoreSelect ),

                .STB_I( STB_O ),

                //Output memory

                .OMBSEL_I( wOMEMBankSelect ),

                .OMADR_I( wOMEMReadAddr ),

                .OMEM_O( wOMEMData ),

                .TMDAT_I( TMDAT_O ),

                .TMADR_I( TMADR_O ),

                .TMWE_I(  TMWE_O ),

                .TMSEL_I( TMSEL_O ),

                .HDL_O( GRDY_I ),

                .HDLACK_I( GACK_O ),

                .STDONE_I( STDONE_O ),

                .RCOMMIT_O( wGPUCommitedResults ),

                .HDA_I( wHostDataAvailable ),

                //Control register

                .CREG_I( rControlRegister[0][15:0] ),

                //Other stuff

                .DONE_O( wDone )

        );

wire[`WB_WIDTH-1:0] wHostReadAddress;

wire[`WB_WIDTH-1:0] wHostReadData;

wire[`WB_WIDTH-1:0] wMemorySize;

wire[1:0] wMemSelect;

MUXFULLPARALELL_2SEL_GENERIC # ( `WB_WIDTH ) MUX1

 (

.Sel( wMemSelect ),

.I1(  rInstructionBuffer[wHostReadAddress] ),

.I2(  rSceneParameters[wHostReadAddress]   ),

.I3(  rVertexBuffer[wHostReadAddress]      ),

.I4(0),

.O1(wHostReadData)

 );

MUXFULLPARALELL_2SEL_GENERIC # ( `WB_WIDTH ) MUX2

 (

.Sel( wMemSelect ),

.I1(  rInstructionBuffer[0] ),

.I2(  rSceneParameters[0]   ),

.I3(  rVertexBuffer[0]      ),

.I4(0),

.O1(wMemorySize)

 );

Module_Host HOST

(

        .Clock( Clock ),

        .Reset( Reset ),

        .iEnable( rHostEnable ),

        .oHostDataAvailable( wHostDataAvailable ),

        .iHostDataReadConfirmed( GRDY_I ),

        .iMemorySize( wMemorySize ),

        .iPrimitiveCount( (rVertexBuffer[6]+1) *7 ),  //This is wrong I think

        .iGPUCommitedResults( wGPUCommitedResults ),

        .STDONE_O( STDONE_O ),

        .iGPUDone( wDone ),

`ifndef NO_DISPLAY_STATS

        .iDebugWidth( `RESOLUTION_WIDTH ),

 `endif

        //To Memory

.oReadAddress( wHostReadAddress ),

.iReadData(    wHostReadData ),

        //To Hub/Switch

.oCoreSelectMask( wCoreSelect ),

.oMemSelect( wMemSelect ),

.DAT_O( DAT_O),

.ADR_O( ADR_O ),

.TGA_O( TGA_O ),

.RENDREN_O( RENDREN_O ),

.CYC_O( CYC_O ),

.STB_O( STB_O ),

.MST_O( MST_O ),

.GRDY_I( GRDY_I ),

.GACK_O( GACK_O ),

.WE_O(  WE_O  ),

.ACK_I( ACK_I )

);

        //---------------------------------------------

        //generate the clock signal here

        always begin

                #`CLOCK_CYCLE  Clock =  ! Clock;

        end

        //---------------------------------------------

//-------------------------------------------------------------------------------------

/*

This makes sure the simulation actually writes the results to the PPM image file

once all the cores are done executing

*/

`define PARTITION_SIZE `RESOLUTION_HEIGHT/`MAX_CORES

integer i,j,kk;

reg [31:0] R;

always @ ( * )

begin

if (wDone == 1'b1)

begin

        $display("Partition Size = %d",`PARTITION_SIZE);

        for (kk = 0; kk < `MAX_CORES; kk = kk+1)

                        begin

                        wOMEMBankSelect = kk;

                                $display("wOMEMBankSelect = %d\n",wOMEMBankSelect);

                                for (j=0; j < `PARTITION_SIZE; j=j+1)

                                begin

                                        for (i = 0; i < `RESOLUTION_HEIGHT*3; i = i +1)

                                        begin

                                        wOMEMReadAddr = i+j*`RESOLUTION_WIDTH*3;

                                        #`CLOCK_PERIOD;

                                        #1;

                                        R = ((wOMEMData >> (`SCALE-8)) > 255) ? 255 : (wOMEMData >>  (`SCALE-8));

                                        $fwrite(out2,"%d " , R );

                                                if ((i %3) == 0)

                                                                $fwrite(out2,"\n# %d %d\n",i/3,j);

                                        end

                                end

                        end

                        $fclose(out2);

                        $fwrite(log, "Simulation end time : %dns\n",$time);

                        $fclose(log);

                        $stop();

end

end

//-------------------------------------------------------------------------------------

reg [15:0] rTimeOut;

        //      `define MAX_INSTRUCTIONS 2

        initial begin

                // Initialize Inputs

                Clock                                   = 0;

                Reset                                   = 0;

                rTimeOut             = 0;

                rHostEnable                     = 0;

                //Read Config register values

                $write("Loading control register.... ");

                $readmemh("Creg.mem",rControlRegister);

                $display("Done");

                //Read configuration Data

                $write("Loading scene parameters.... ");

                $readmemh("Params.mem", rSceneParameters        );

                $display("Done");

                //Read Scene Data

                $write("Loading scene geometry.... ");

                $readmemh("Vertex.mem",rVertexBuffer);

                $display("Done");

                $display("Number of primitives(%d): %d",rVertexBuffer[6],(rVertexBuffer[6]+1) *7);

                //Read Texture Data

                $write("Loading scene texture.... ");

                $readmemh("Textures.mem",rTextures);

                $display("Done");

                //Read instruction data

                $write("Loading code allocation table and user shaders.... ");

                $readmemh("Instructions.mem",rInstructionBuffer);

                $display("Done");

                $display("Control Register : %b",rControlRegister[0]);

                $display("Resolution       : %d X %d",`RESOLUTION_WIDTH, `RESOLUTION_HEIGHT );

                log  = $fopen("Simulation.log");

                $fwrite(log, "Simulation start time : %dns\n",$time);

                $fwrite(log, "Width : %d\n",`RESOLUTION_WIDTH);

                $fwrite(log, "Height : %d\n",`RESOLUTION_HEIGHT);

                //Open output file

                out2 = $fopen("Output.ppm");

                $fwrite(out2,"P3\n");

                $fwrite(out2,"#This file was generated by Theia's RTL simulation\n");

                $fwrite(out2,"%d %d\n",`RESOLUTION_WIDTH, `RESOLUTION_HEIGHT );

                $fwrite(out2,"255\n");

                #10

                Reset = 1;

                // Wait 100 ns for global reset to finish

                TMWE_O = 1;

                #100  Reset = 0;

                TMWE_O = 1;

                $display("Intilializing TMEM @ %dns",$time);

                //starts in 2 to skip Width and Height

                for (k = 0;k < `TEXTURE_BUFFER_SIZE; k = k + 1)

                begin

                        TMADR_O <= (k >> (`MAX_CORE_BITS));

                        TMSEL_O <= (k & (`MAX_TMEM_BANKS-1));           //X mod 2^n == X & (2^n - 1)

                        TMDAT_O <= rTextures[k];

                        #10;

                end

                $display("Done Intilializing TMEM @ %dns",$time);

                TMWE_O = 0;

                rHostEnable = 1;

        end

endmodule