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/********************************************************************************** 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. ***********************************************************************************/ /********************************************************************************** Description: This is the main Finite State Machine. **********************************************************************************/ `timescale 1ns / 1ps `include "aDefinitions.v" `define CU_AFTER_RESET_STATE 0 `define CU_WAIT_FOR_INITIAL_CONFIGURATION 1 `define CU_TRIGGER_CONFIGURATION_DATA_READ 2 `define CU_WAIT_FOR_CONFIG_DATA_READ 3 `define CU_ACK_CONFIG_DATA_READ 4 `define CU_PRECALCULATE_CONSTANTS 5 `define CU_WAIT_FOR_CONSTANT 6 `define CU_ACK_PRECALCULATE_CONSTANTS 7 `define CU_WAIT_FOR_TASK 8 `define CU_READ_TASK_DATA 9 `define CU_WAIT_TASK_DATA_READ 10 `define CU_ACK_TASK_DATA_READ 11 `define CU_TRIGGER_RGU 12 `define CU_WAIT_FOR_RGU 13 `define CU_ACK_RGU 14 `define CU_TRIGGER_GEO 15 `define CU_WAIT_FOR_GEO_SYNC 16 //`define CU_CHECK_AABBIU_REQUEST 17 `define CU_TRIGGER_TCC 17 //`define CU_CHECK_BIU_REQUEST 18 //`define CU_TRIGGER_TFF 18 //`define CU_CHECK_GEO_DONE 19 //`define CU_WAIT_FOR_TFF 19 `define CU_TRIGGER_AABBIU 20 `define CU_WAIT_FOR_AABBIU 21 `define CU_TRIGGER_MAIN 22 `define CU_WAIT_FOR_MAIN 23 `define CU_ACK_MAIN 24 `define CU_TRIGGER_PSU 25 `define CU_WAIT_FOR_PSU 26 `define CU_ACK_PSU 27 //`define CU_TRIGGER_PCU 28 `define CU_WAIT_FOR_PCU 29 `define CU_ACK_PCU 30 `define CU_CHECK_HIT 31 `define CU_CLEAR_REGISTERS 32 `define CU_WAIT_CLEAR_REGISTERS 33 `define CU_ACK_CLEAR_REGISTERS 34 `define CU_TRIGGER_PSU_WITH_TEXTURE 35 `define WAIT_FOR_TCC 36 `define CU_TRIGGER_NPU 37 `define CU_WAIT_NPU 38 `define CU_ACK_NPU 39 `define CU_PERFORM_INTIAL_CONFIGURATION 40 `define CU_SET_PICTH 41 `define CU_TRIGGER_USERCONSTANTS 42 `define CU_WAIT_USERCONSTANTS 43 `define CU_ACK_USERCONSTANTS 44 `define CU_TRIGGER_USERPIXELSHADER 45 `define CU_WAIT_FOR_USERPIXELSHADER 46 `define CU_ACK_USERPIXELSHADER 47 `define CU_DONE 48 `define CU_WAIT_FOR_RENDER_ENABLE 49 `define CU_ACK_TCC 50 `define CU_WAIT_FOR_HOST_DATA_AVAILABLE 51 `define CU_WAIT_FOR_HOST_DATA_ACK 52 //-------------------------------------------------------------- module ControlUnit ( input wire Clock, input wire Reset, input wire[15:0] iControlRegister, output reg oGFUEnable, input wire iTriggerAABBIURequest, input wire iTriggerBIURequest, input wire iTriggertTCCRequest, output reg oUCodeEnable, output reg[`ROM_ADDRESS_WIDTH-1:0] oCodeInstructioPointer, input wire iUCodeDone, input wire iUCodeReturnValue, input wire iGFUDone, input wire iGEOSync, output reg oTriggerTFF, input wire iTFFDone, input wire MST_I, //output reg[2:0] //oRamBusOwner, input wire iIODone, output reg oSetCurrentPitch, output reg oFlipMemEnabled, output reg oFlipMem, output reg oIOWritePixel, input wire iRenderEnable, input wire iSceneTraverseComplete, input wire iHostDataAvailable, input wire iHostAckDataRead, `ifdef DEBUG input wire[`MAX_CORES-1:0] iDebug_CoreID, `endif output reg oResultCommited, output reg oDone ); //Internal State Machine varibles reg [5:0] CurrentState; reg [5:0] NextState; integer ucode_file; reg rResetHitFlop,rHitFlopEnable; wire wHit; `ifdef DUMP_CODE integer log; initial begin //$display("Opening ucode dump file....\n"); ucode_file = $fopen("CU.log","w"); end `endif //-------------------------------------------------------------- FFToggleOnce_1Bit FFTO1 ( .Clock( Clock ), .Reset( rResetHitFlop ), .Enable( rHitFlopEnable && iUCodeDone ), .S( iUCodeReturnValue ), .Q( wHit ) ); //-------------------------------------------------------------- `ifdef DEBUG_CU always @ ( wHit ) begin $display( "*** Triangle HIT ***\n"); end `endif //Next states logic and Reset sequence always @(posedge Clock or posedge Reset) begin if (Reset) CurrentState <= `CU_AFTER_RESET_STATE; else CurrentState <= NextState; end //-------------------------------------------------------------- always @ ( * ) begin case (CurrentState) //----------------------------------------- `CU_AFTER_RESET_STATE: begin `ifdef DEBUG_CU $display("%d CU_AFTER_RESET_STATE\n",$time); `endif //oRamBusOwner = 0; oCodeInstructioPointer = `ENTRYPOINT_INDEX_INITIAL; oGFUEnable = 0; oUCodeEnable = 0; oIOWritePixel = 0; rResetHitFlop = 1; rHitFlopEnable = 0; oTriggerTFF = 0; oSetCurrentPitch = 1; oFlipMemEnabled = 0; oFlipMem = 0; oDone = 0; oResultCommited = 0; //oIncCurrentPitch = 0; NextState = `CU_WAIT_FOR_INITIAL_CONFIGURATION; end //----------------------------------------- `CU_WAIT_FOR_INITIAL_CONFIGURATION: begin //$display("CORE: %d CU_WAIT_FOR_INITIAL_CONFIGURATION", iDebug_CoreID); // `ifdef DEBUG_CU // $display("%d Control: CU_WAIT_FOR_INITIAL_CONFIGURATION\n",$time); // `endif //oRamBusOwner = 0; oCodeInstructioPointer = 0; oGFUEnable = 0; oUCodeEnable = 0; oIOWritePixel = 0; rResetHitFlop = 1; rHitFlopEnable = 0; oTriggerTFF = 0; oSetCurrentPitch = 0; oFlipMemEnabled = 0; oFlipMem = 0; oDone = 0; oResultCommited = 0; //oIncCurrentPitch = 0; if ( MST_I ) NextState = `CU_PERFORM_INTIAL_CONFIGURATION;//`CU_WAIT_FOR_CONFIG_DATA_READ; else NextState = `CU_WAIT_FOR_INITIAL_CONFIGURATION; end //----------------------------------------- `CU_PERFORM_INTIAL_CONFIGURATION: begin //oRamBusOwner = 0; oCodeInstructioPointer = 0; oGFUEnable = 0; oUCodeEnable = 0; oIOWritePixel = 0; rResetHitFlop = 1; rHitFlopEnable = 0; oTriggerTFF = 0; oSetCurrentPitch = 0; oFlipMemEnabled = 0; oFlipMem = 0; oDone = 0; oResultCommited = 0; //oIncCurrentPitch = 0; if ( MST_I == 0 && iRenderEnable == 1'b1) NextState = `CU_CLEAR_REGISTERS;//`CU_WAIT_FOR_CONFIG_DATA_READ; else NextState = `CU_PERFORM_INTIAL_CONFIGURATION; end //----------------------------------------- `CU_CLEAR_REGISTERS: begin `ifdef DEBUG_CU $display("%d CU_CLEAR_REGISTERS\n",$time); `endif //oRamBusOwner = `REG_BUS_OWNED_BY_UCODE; oCodeInstructioPointer = `ENTRYPOINT_INDEX_INITIAL; oGFUEnable = 0; oUCodeEnable = 1; //* oIOWritePixel = 0; rResetHitFlop = 0; rHitFlopEnable = 0; oTriggerTFF = 0; oSetCurrentPitch = 0; oFlipMemEnabled = 1; oFlipMem = 0; oDone = 0; oResultCommited = 0; ////$display("\n\n %d XOXOXOXOX FLIP XOXOXOXOXOX\n\n",$time); //oIncCurrentPitch = 0; NextState = `CU_WAIT_CLEAR_REGISTERS; end //----------------------------------------- `CU_WAIT_CLEAR_REGISTERS: begin // `ifdef DEBUG_CU // $display("%d CU_WAIT_CLEAR_REGISTERS\n",$time); // `endif //$display("CORE: %d CU_WAIT_CLEAR_REGISTERS", iDebug_CoreID); //oRamBusOwner = `REG_BUS_OWNED_BY_UCODE; oCodeInstructioPointer = `ENTRYPOINT_INDEX_INITIAL; oGFUEnable = 0; oUCodeEnable = 0; oIOWritePixel = 0; rResetHitFlop = 0; rHitFlopEnable = 0; oTriggerTFF = 0; oSetCurrentPitch = 0; oFlipMemEnabled = 1; oFlipMem = 0; oDone = 0; oResultCommited = 0; //oIncCurrentPitch = 0; if ( iUCodeDone ) NextState = `CU_ACK_CLEAR_REGISTERS; else NextState = `CU_WAIT_CLEAR_REGISTERS; end //----------------------------------------- `CU_ACK_CLEAR_REGISTERS: begin `ifdef DEBUG_CU $display("%d CU_ACK_CLEAR_REGISTERS\n", $time); `endif //$display("CORE: %d CU_ACK_CLEAR_REGISTERS", iDebug_CoreID); //oRamBusOwner = 0; oCodeInstructioPointer = 0; oGFUEnable = 0; oUCodeEnable = 0; //* oIOWritePixel = 0; rResetHitFlop = 0; rHitFlopEnable = 0; oTriggerTFF = 0; oSetCurrentPitch = 0; oFlipMemEnabled = 0; oFlipMem = 0; oDone = 0; oResultCommited = 0; //oIncCurrentPitch = 0; NextState = `CU_WAIT_FOR_CONFIG_DATA_READ; end //----------------------------------------- `CU_WAIT_FOR_CONFIG_DATA_READ: begin // `ifdef DEBUG_CU // $display("%d Control: CU_WAIT_FOR_CONFIG_DATA_READ\n",$time); // `endif //$display("CORE: %d CU_WAIT_FOR_CONFIG_DATA_READ", iDebug_CoreID); //oRamBusOwner = 0;//`REG_BUS_OWNED_BY_BCU; oCodeInstructioPointer = 0; oGFUEnable = 0; oUCodeEnable = 0; oIOWritePixel = 0; rResetHitFlop = 0; rHitFlopEnable = 0; oTriggerTFF = 0; oSetCurrentPitch = 0; oFlipMemEnabled = 0; oFlipMem = 0; oDone = 0; oResultCommited = 0; //oIncCurrentPitch = 0; if ( MST_I == 0 ) NextState = `CU_PRECALCULATE_CONSTANTS; else NextState = `CU_WAIT_FOR_CONFIG_DATA_READ; end //----------------------------------------- `CU_PRECALCULATE_CONSTANTS: begin //$display("CORE: %d CU_PRECALCULATE_CONSTANTS", iDebug_CoreID); `ifdef DEBUG_CU $display("%d Control: CU_PRECALCULATE_CONSTANTS\n", $time); `endif //oRamBusOwner = `REG_BUS_OWNED_BY_UCODE; oCodeInstructioPointer = `ENTRYPOINT_INDEX_CPPU; oGFUEnable = 0; oUCodeEnable = 1; //* oIOWritePixel = 0; rResetHitFlop = 0; rHitFlopEnable = 0; oTriggerTFF = 0; oSetCurrentPitch = 0; oFlipMemEnabled = 0; oFlipMem = 0; oDone = 0; oResultCommited = 0; //oIncCurrentPitch = 0; NextState = `CU_WAIT_FOR_CONSTANT; end //----------------------------------------- `CU_WAIT_FOR_CONSTANT: begin // `ifdef DEBUG_CU // $display("%d Control: CU_WAIT_FOR_CONSTANT\n", $time); // `endif //oRamBusOwner = `REG_BUS_OWNED_BY_UCODE; oCodeInstructioPointer = `ENTRYPOINT_INDEX_CPPU; oGFUEnable = 0; oUCodeEnable = 0; //* oIOWritePixel = 0; rResetHitFlop = 0; rHitFlopEnable = 0; oTriggerTFF = 0; oSetCurrentPitch = 0; oFlipMemEnabled = 0; oFlipMem = 0; oDone = 0; oResultCommited = 0; //oIncCurrentPitch = 0; if ( iUCodeDone ) NextState = `CU_ACK_PRECALCULATE_CONSTANTS; else NextState = `CU_WAIT_FOR_CONSTANT; end //----------------------------------------- `CU_ACK_PRECALCULATE_CONSTANTS: begin //$display("CORE: %d CU_ACK_PRECALCULATE_CONSTANTS", iDebug_CoreID); `ifdef DEBUG_CU $display("%d Control: CU_ACK_PRECALCULATE_CONSTANTS\n", $time); `endif //oRamBusOwner = 0;//`REG_BUS_OWNED_BY_BCU; oCodeInstructioPointer = 0; oGFUEnable = 0; oUCodeEnable = 0; //* oIOWritePixel = 0; rResetHitFlop = 0; rHitFlopEnable = 0; oTriggerTFF = 0; oSetCurrentPitch = 0; oFlipMemEnabled = 0; oFlipMem = 0; oDone = 0; oResultCommited = 0; //oIncCurrentPitch = 0; NextState = `CU_TRIGGER_USERCONSTANTS;//CU_WAIT_FOR_TASK; end //----------------------------------------- `CU_TRIGGER_USERCONSTANTS: begin `ifdef DEBUG_CU $display("%d Control: CU_TRIGGER_USERCONSTANTS\n",$time); `endif //$display("CORE: %d CU_TRIGGER_USERCONSTANTS", iDebug_CoreID); //oRamBusOwner = `REG_BUS_OWNED_BY_UCODE; oCodeInstructioPointer = `ENTRYPOINT_INDEX_USERCONSTANTS; oGFUEnable = 0; oUCodeEnable = 1; //* oIOWritePixel = 0; rResetHitFlop = 0; rHitFlopEnable = 0; oTriggerTFF = 0; oSetCurrentPitch = 0; oFlipMemEnabled = 0; oFlipMem = 0; oDone = 0; oResultCommited = 0; //oIncCurrentPitch = 0; NextState = `CU_WAIT_USERCONSTANTS; end //----------------------------------------- `CU_WAIT_USERCONSTANTS: begin // `ifdef DEBUG_CU // $display("%d Control: CU_WAIT_FOR_RGU\n",$time); // `endif //oRamBusOwner = `REG_BUS_OWNED_BY_UCODE; oCodeInstructioPointer = `ENTRYPOINT_INDEX_USERCONSTANTS; oGFUEnable = 0; oUCodeEnable = 0; oIOWritePixel = 0; rResetHitFlop = 0; rHitFlopEnable = 0; oTriggerTFF = 0; oSetCurrentPitch = 0; oFlipMemEnabled = 0; oFlipMem = 0; oDone = 0; oResultCommited = 0; //oIncCurrentPitch = 0; if ( iUCodeDone ) NextState = `CU_ACK_USERCONSTANTS; else NextState = `CU_WAIT_USERCONSTANTS; end //----------------------------------------- `CU_ACK_USERCONSTANTS: begin `ifdef DEBUG_CU $display("%d Control: CU_ACK_RGU\n",$time); `endif //$display("CORE: %d CU_ACK_USERCONSTANTS", iDebug_CoreID); //oRamBusOwner = `REG_BUS_OWNED_BY_UCODE; oCodeInstructioPointer = 0; oGFUEnable = 0; oUCodeEnable = 0; //* oIOWritePixel = 0; rResetHitFlop = 0; rHitFlopEnable = 0; oTriggerTFF = 0; oSetCurrentPitch = 0; oFlipMemEnabled = 0; oFlipMem = 0; oDone = 0; oResultCommited = 0; //oIncCurrentPitch = 0; if ( iUCodeDone == 0) NextState = `CU_WAIT_FOR_RENDER_ENABLE; else NextState = `CU_ACK_USERCONSTANTS; end //----------------------------------------- `CU_WAIT_FOR_RENDER_ENABLE: begin `ifdef DEBUG_CU $display("CORE: %d CU_WAIT_FOR_RENDER_ENABLE", iDebug_CoreID); `endif //oRamBusOwner = `REG_BUS_OWNED_BY_UCODE; oCodeInstructioPointer = 0; oGFUEnable = 0; oUCodeEnable = 0; //* oIOWritePixel = 0; rResetHitFlop = 0; rHitFlopEnable = 0; oTriggerTFF = 0; oSetCurrentPitch = 0; oFlipMemEnabled = 0; oFlipMem = 0; oDone = 0; oResultCommited = 0; //oIncCurrentPitch = 0; if ( iRenderEnable) NextState = `CU_TRIGGER_RGU; else NextState = `CU_WAIT_FOR_RENDER_ENABLE; end //----------------------------------------- `CU_TRIGGER_RGU: begin `ifdef DEBUG_CU $display("CORE: %d CU_TRIGGER_RGU", iDebug_CoreID); `endif //oRamBusOwner = `REG_BUS_OWNED_BY_UCODE; oCodeInstructioPointer = `ENTRYPOINT_INDEX_RGU; oGFUEnable = 0; oUCodeEnable = 1; //* oIOWritePixel = 0; rResetHitFlop = 0; rHitFlopEnable = 0; oTriggerTFF = 0; oSetCurrentPitch = 0; oFlipMemEnabled = 0; oFlipMem = 0; oDone = 0; oResultCommited = 0; //oIncCurrentPitch = 0; NextState = `CU_WAIT_FOR_RGU; end //----------------------------------------- `CU_WAIT_FOR_RGU: begin // `ifdef DEBUG_CU // $display("%d Control: CU_WAIT_FOR_RGU\n",$time); // `endif //oRamBusOwner = `REG_BUS_OWNED_BY_UCODE; oCodeInstructioPointer = 0; oGFUEnable = 0; oUCodeEnable = 0; oIOWritePixel = 0; rResetHitFlop = 0; rHitFlopEnable = 0; oTriggerTFF = 0; oSetCurrentPitch = 0; oFlipMemEnabled = 0; oFlipMem = 0; oDone = 0; oResultCommited = 0; //oIncCurrentPitch = 0; if ( iUCodeDone ) NextState = `CU_ACK_RGU; else NextState = `CU_WAIT_FOR_RGU; end //----------------------------------------- `CU_ACK_RGU: begin `ifdef DEBUG_CU $display("CORE: %d CU_ACK_RGU", iDebug_CoreID); `endif //oRamBusOwner = `REG_BUS_OWNED_BY_UCODE; oCodeInstructioPointer = 0; oGFUEnable = 0; oUCodeEnable = 0; //* oIOWritePixel = 0; rResetHitFlop = 0; rHitFlopEnable = 0; oTriggerTFF = 0; oSetCurrentPitch = 0; oFlipMemEnabled = 1; oFlipMem = 0; oDone = 0; oResultCommited = 0; //oIncCurrentPitch = 0; if ( iUCodeDone == 0 & iRenderEnable == 1) NextState = `CU_WAIT_FOR_HOST_DATA_AVAILABLE;//`CU_TRIGGER_GEO;///////////// GET RID OF GEO!!! else NextState = `CU_ACK_RGU; end //----------------------------------------- `CU_TRIGGER_TCC: begin ////$display("CU_TRIGGER_TCC"); `ifdef DEBUG_CU $display("%d CORE %d Control: CU_TRIGGER_TCC\n",$time,iDebug_CoreID); `endif //oRamBusOwner = `REG_BUS_OWNED_BY_UCODE; oCodeInstructioPointer = `ENTRYPOINT_INDEX_TCC; oUCodeEnable = 1; //* oGFUEnable = 0; oIOWritePixel = 0; rResetHitFlop = 0; rHitFlopEnable = 0; oTriggerTFF = 0; oSetCurrentPitch = 0; oFlipMemEnabled = 1; oFlipMem = 0; //We need u,v from last IO read cycle oResultCommited = 0; ////$display("\n\n %d XOXOXOXOX FLIP XOXOXOXOXOX\n\n",$time); //oIncCurrentPitch = 0; oDone = 0; NextState = `WAIT_FOR_TCC; end //----------------------------------------- `WAIT_FOR_TCC: begin ////$display("WAIT_FOR_TCC"); //oRamBusOwner = `REG_BUS_OWNED_BY_UCODE; oCodeInstructioPointer = `ENTRYPOINT_INDEX_TCC; oUCodeEnable = 0; //* oGFUEnable = 0; oIOWritePixel = 0; rResetHitFlop = 0; rHitFlopEnable = 0; oTriggerTFF = 0; oSetCurrentPitch = 0; oFlipMemEnabled = 1; oFlipMem = 0; oDone = 0; oResultCommited = 0; //oIncCurrentPitch = 0; if ( iUCodeDone ) NextState = `CU_ACK_TCC; else NextState = `WAIT_FOR_TCC; end //----------------------------------------- `CU_ACK_TCC: begin ////$display("WAIT_FOR_TCC"); //oRamBusOwner = `REG_BUS_OWNED_BY_UCODE; oCodeInstructioPointer = `ENTRYPOINT_INDEX_TCC; oUCodeEnable = 0; //* oGFUEnable = 0; oIOWritePixel = 0; rResetHitFlop = 0; rHitFlopEnable = 0; oTriggerTFF = 0; oSetCurrentPitch = 0; oFlipMemEnabled = 0; oFlipMem = 0; oDone = 0; oResultCommited = 0; //oIncCurrentPitch = 0; if ( iUCodeDone == 0 && iSceneTraverseComplete == 1'b1) //DDDD NextState = `CU_TRIGGER_PSU_WITH_TEXTURE; else if (iUCodeDone == 0 && iSceneTraverseComplete == 1'b0) NextState = `CU_WAIT_FOR_HOST_DATA_AVAILABLE; else NextState = `CU_ACK_TCC; end //----------------------------------------- /* Was there any hit at all? At this point, all the triangles in the list have been traversed looking for a hit with our ray. There are 3 possibilities: 1) The was not a single hit, then just paint a black pixel on the screen and send it via PCU. 2)There was a hit and Texturing is not enabled, then trigger the PSU with no texturing 2) There was a hit and Texturing is enabled, then fetch the texture values corresponding to the triangle that we hitted. */ `CU_CHECK_HIT: begin `ifdef DEBUG_CU $display("%d CORE %d Control: CU_CHECK_HIT\n",$time,iDebug_CoreID); `endif //oRamBusOwner = `REG_BUS_OWNED_BY_GFU; oCodeInstructioPointer = 0; oUCodeEnable = 0; oGFUEnable = 0; ///CHANGED Aug 15 oIOWritePixel = 0; rResetHitFlop = 0; rHitFlopEnable = 0; oTriggerTFF = 0; oSetCurrentPitch = 0; oFlipMemEnabled = 0; oFlipMem = 0; oDone = 0; oResultCommited = 0; if (wHit) begin //$display("HIT"); NextState = `CU_TRIGGER_PSU_WITH_TEXTURE; end else NextState = `CU_TRIGGER_USERPIXELSHADER;//666 end //----------------------------------------- `CU_TRIGGER_PSU_WITH_TEXTURE: begin `ifdef DEBUG_CU $display("%d Control: CU_TRIGGER_PSU_WITH_TEXTURE\n",$time); `endif //oRamBusOwner = `REG_BUS_OWNED_BY_UCODE; oCodeInstructioPointer = `ENTRYPOINT_INDEX_PSU2; oUCodeEnable = 1; oGFUEnable = 0; oIOWritePixel = 0; rResetHitFlop = 1; rHitFlopEnable = 0; oTriggerTFF = 0; oSetCurrentPitch = 0; oFlipMemEnabled = 0;//////NEW NEW NEW NEW oFlipMem = 0; oDone = 0; oResultCommited = 0; ////$display("\n\n %d XOXOXOXOX FLIP XOXOXOXOXOX\n\n",$time); //oIncCurrentPitch = 0; NextState = `CU_WAIT_FOR_PSU; end //----------------------------------------- `CU_WAIT_FOR_HOST_DATA_ACK: begin oCodeInstructioPointer = 0; oUCodeEnable = 0; oGFUEnable = 0; oIOWritePixel = 0; rResetHitFlop = 0; rHitFlopEnable = 0; oTriggerTFF = 0; oSetCurrentPitch = 0; oFlipMemEnabled = 0; oFlipMem = 0; oDone = 0; oResultCommited = 0; if ( iHostAckDataRead ) NextState = `CU_WAIT_FOR_HOST_DATA_AVAILABLE; else NextState = `CU_WAIT_FOR_HOST_DATA_ACK; end //----------------------------------------- //Wait until data from Host becomes available `CU_WAIT_FOR_HOST_DATA_AVAILABLE: begin //oRamBusOwner = `REG_BUS_OWNED_BY_UCODE; oCodeInstructioPointer = 0; oUCodeEnable = 0; oGFUEnable = 0; oIOWritePixel = 0; rResetHitFlop = 0; rHitFlopEnable = 0; oTriggerTFF = 0; oSetCurrentPitch = 0; oFlipMemEnabled = 0; oFlipMem = 0; oDone = 0; oResultCommited = 0; if ( iHostDataAvailable ) NextState = `CU_TRIGGER_MAIN; else NextState = `CU_WAIT_FOR_HOST_DATA_AVAILABLE; end //----------------------------------------- `CU_TRIGGER_MAIN: begin `ifdef DEBUG_CU $display("%d CORE: %d Control: CU_TRIGGER_MAIN\n",$time,iDebug_CoreID); `endif //oRamBusOwner = `REG_BUS_OWNED_BY_UCODE; oCodeInstructioPointer = `ENTRYPOINT_INDEX_MAIN; oUCodeEnable = 1; oGFUEnable = 1; oIOWritePixel = 0; rResetHitFlop = 0; rHitFlopEnable = 0; oTriggerTFF = 0; oSetCurrentPitch = 0; oFlipMemEnabled = 1; oFlipMem = 1; oDone = 0; oResultCommited = 0; ////$display("\n\n %d XOXOXOXOX FLIP XOXOXOXOXOX\n\n",$time); //oIncCurrentPitch = 0; // $stop(); NextState = `CU_WAIT_FOR_MAIN; end //----------------------------------------- `CU_WAIT_FOR_MAIN: begin // `ifdef DEBUG_CU // $display("%d Control: CU_WAIT_FOR_MAIN\n",$time); // `endif //oRamBusOwner = `REG_BUS_OWNED_BY_UCODE; oCodeInstructioPointer = `ENTRYPOINT_INDEX_MAIN; oUCodeEnable = 0; oGFUEnable = 1; oIOWritePixel = 0; rResetHitFlop = 0; rHitFlopEnable = 1; oTriggerTFF = 0; oSetCurrentPitch = 0; oFlipMemEnabled = 1; oFlipMem = 0; oDone = 0; oResultCommited = 0; //oIncCurrentPitch = 0; //NextState = `CU_WAIT_FOR_MAIN; if ( iUCodeDone ) NextState = `CU_ACK_MAIN; else NextState = `CU_WAIT_FOR_MAIN; end //----------------------------------------- /* ACK UCODE by setting oUCodeEnable = 0 */ `CU_ACK_MAIN: begin `ifdef DEBUG_CU $display("%d CORE: %d Control: CU_ACK_MAIN\n",$time, iDebug_CoreID); `endif //oRamBusOwner = `REG_BUS_OWNED_BY_GFU; oCodeInstructioPointer = 0; //* oUCodeEnable = 0; //* oGFUEnable = 0; //Changed Aug 15 oIOWritePixel = 0; rResetHitFlop = 0; rHitFlopEnable = 1; oTriggerTFF = 0; oSetCurrentPitch = 0; oFlipMemEnabled = 0; oFlipMem = 0; oDone = 0; oResultCommited = 0; //oIncCurrentPitch = 0; // $stop(); if ( iUCodeDone == 1'b0 & iSceneTraverseComplete == 1'b1) NextState = `CU_CHECK_HIT; else if ( iUCodeDone == 1'b0 & iSceneTraverseComplete == 1'b0) //ERROR!!! What if iSceneTraverseComplete will become 1 a cycle after this?? NextState = `CU_WAIT_FOR_HOST_DATA_ACK;//`CU_WAIT_FOR_HOST_DATA_AVAILABLE; else NextState = `CU_ACK_MAIN; end //----------------------------------------- `CU_WAIT_FOR_PSU: begin // `ifdef DEBUG_CU // $display("%d Control: CU_TRIGGER_PSU\n",$time); // `endif //oRamBusOwner = `REG_BUS_OWNED_BY_UCODE; oCodeInstructioPointer = `ENTRYPOINT_INDEX_PSU; oUCodeEnable = 0; oGFUEnable = 0; oIOWritePixel = 0; rResetHitFlop = 0; rHitFlopEnable = 0; oTriggerTFF = 0; oSetCurrentPitch = 0; oFlipMemEnabled = 1; oFlipMem = 0; oDone = 0; oResultCommited = 0; //oIncCurrentPitch = 0; if ( iUCodeDone ) NextState = `CU_ACK_PSU; else NextState = `CU_WAIT_FOR_PSU; end //----------------------------------------- `CU_ACK_PSU: begin `ifdef DEBUG_CU $display("%d CORE: %d Control: CU_ACK_PSU\n",$time, iDebug_CoreID); `endif //oRamBusOwner = `REG_BUS_OWNED_BY_UCODE; oCodeInstructioPointer = 0; //* oUCodeEnable = 0; //* oGFUEnable = 0; oIOWritePixel = 0; rResetHitFlop = 0; rHitFlopEnable = 0; oTriggerTFF = 0; oSetCurrentPitch = 0; oFlipMemEnabled = 1; oFlipMem = 0; oDone = 0; oResultCommited = 0; //oIncCurrentPitch = 0; if ( iUCodeDone == 0) NextState = `CU_TRIGGER_USERPIXELSHADER; else NextState = `CU_ACK_PSU; end //----------------------------------------- //----------------------------------------- `CU_TRIGGER_NPU: //Next Pixel Unit begin `ifdef DEBUG_CU $display("%d CORE: %d Control: CU_TRIGGER_NPU\n",$time, iDebug_CoreID); `endif //$write("*"); //oRamBusOwner = `REG_BUS_OWNED_BY_UCODE; oCodeInstructioPointer = `ENTRYPOINT_INDEX_NPG; //* oUCodeEnable = 1; //* oGFUEnable = 0; oIOWritePixel = 0; rResetHitFlop = 0; rHitFlopEnable = 0; oTriggerTFF = 0; oSetCurrentPitch = 0; oFlipMemEnabled = 1; oFlipMem = 0; oDone = 0; oResultCommited = 0; //oIncCurrentPitch = 0; NextState = `CU_WAIT_NPU; end //----------------------------------------- `CU_WAIT_NPU: begin //oRamBusOwner = `REG_BUS_OWNED_BY_UCODE; oCodeInstructioPointer = `ENTRYPOINT_INDEX_NPG; oUCodeEnable = 0; oGFUEnable = 0; oIOWritePixel = 0; rResetHitFlop = 0; rHitFlopEnable = 0; oTriggerTFF = 0; oSetCurrentPitch = 0; oFlipMemEnabled = 1; oFlipMem = 0; oDone = 0; oResultCommited = 0; //oIncCurrentPitch = 0; if ( iUCodeDone ) NextState = `CU_ACK_NPU; else NextState = `CU_WAIT_NPU; end //----------------------------------------- /* Next Pixel generation: here we either goto to RGU for the next pixel, or we have no more pixels so we are done we our picture! */ `CU_ACK_NPU: begin `ifdef DEBUG_CU $display("%d CORE: %d Control: CU_ACK_NPU\n",$time, iDebug_CoreID); `endif //oRamBusOwner = `REG_BUS_OWNED_BY_UCODE; oCodeInstructioPointer = 0; //* oUCodeEnable = 0; //* oGFUEnable = 0; oIOWritePixel = 0; rResetHitFlop = 0; rHitFlopEnable = 0; oTriggerTFF = 0; oSetCurrentPitch = 0; oFlipMemEnabled = 1; oFlipMem = 0; oDone = 0; oResultCommited = 0; //oIncCurrentPitch = 0; if ( iUCodeDone == 0 && iUCodeReturnValue == 1) NextState = `CU_TRIGGER_RGU; else if (iUCodeDone == 0 && iUCodeReturnValue == 0) NextState = `CU_DONE; else NextState = `CU_ACK_NPU; end //----------------------------------------- `CU_DONE: begin //oRamBusOwner = `REG_BUS_OWNED_BY_UCODE; oCodeInstructioPointer = 0; oUCodeEnable = 0; oGFUEnable = 0; oIOWritePixel = 0; rResetHitFlop = 0; rHitFlopEnable = 0; oTriggerTFF = 0; oSetCurrentPitch = 0; oFlipMemEnabled = 0; oFlipMem = 1; oDone = 1; oResultCommited = 0; //oIncCurrentPitch = 0; NextState = `CU_DONE; end //----------------------------------------- /* Here we no longer use GFU so set Enable to zero */ `CU_TRIGGER_USERPIXELSHADER: begin `ifdef DEBUG_CU $display("%d Control: CU_TRIGGER_PSU\n",$time); `endif //oRamBusOwner = `REG_BUS_OWNED_BY_UCODE; oCodeInstructioPointer = `ENTRYPOINT_INDEX_PIXELSHADER; oUCodeEnable = 1; oGFUEnable = 0;//* oIOWritePixel = 0; rResetHitFlop = 0; rHitFlopEnable = 0; oTriggerTFF = 0; oSetCurrentPitch = 0; oFlipMemEnabled = 1; oFlipMem = 0; oDone = 0; oResultCommited = 0; //oIncCurrentPitch = 0; NextState = `CU_WAIT_FOR_USERPIXELSHADER; end //----------------------------------------- `CU_WAIT_FOR_USERPIXELSHADER: begin // `ifdef DEBUG_CU // $display("%d Control: CU_TRIGGER_PSU\n",$time); // `endif //oRamBusOwner = `REG_BUS_OWNED_BY_UCODE; oCodeInstructioPointer = `ENTRYPOINT_INDEX_PIXELSHADER; oUCodeEnable = 0; oGFUEnable = 0; oIOWritePixel = 0; rResetHitFlop = 0; rHitFlopEnable = 0; oTriggerTFF = 0; oSetCurrentPitch = 0; oFlipMemEnabled = 1; oFlipMem = 0; oDone = 0; oResultCommited = 0; //oIncCurrentPitch = 0; if ( iUCodeDone ) NextState = `CU_ACK_USERPIXELSHADER; else NextState = `CU_WAIT_FOR_USERPIXELSHADER; end //----------------------------------------- `CU_ACK_USERPIXELSHADER: begin `ifdef DEBUG_CU $display("%d Control: CU_ACK_PSU\n",$time); `endif //oRamBusOwner = `REG_BUS_OWNED_BY_UCODE; oCodeInstructioPointer = 0; //* oUCodeEnable = 0; //* oGFUEnable = 0; oIOWritePixel = 0; rResetHitFlop = 0; rHitFlopEnable = 0; oTriggerTFF = 0; oSetCurrentPitch = 0; oFlipMemEnabled = 1; oFlipMem = 0; oDone = 0; oResultCommited = 1; //oIncCurrentPitch = 0; if ( iUCodeDone == 0) NextState = `CU_TRIGGER_NPU;//`CU_TRIGGER_PCU; else NextState = `CU_ACK_USERPIXELSHADER; end //--------------------------------------------------- default: begin `ifdef DEBUG_CU $display("%d Control: ERROR Undefined State\n",$time); `endif //oRamBusOwner = 0; oCodeInstructioPointer = 0; oUCodeEnable = 0; oGFUEnable = 0; oIOWritePixel = 0; rResetHitFlop = 0; rHitFlopEnable = 0; oTriggerTFF = 0; oSetCurrentPitch = 0; oFlipMemEnabled = 0; oFlipMem = 0; oDone = 0; oResultCommited = 0; //oIncCurrentPitch = 0; NextState = `CU_AFTER_RESET_STATE; end //----------------------------------------- endcase end //always endmodule
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