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