/**********************************************************************************
|
/**********************************************************************************
|
Theaia, Ray Cast Programable graphic Processing Unit.
|
Theaia, Ray Cast Programable graphic Processing Unit.
|
Copyright (C) 2009 Diego Valverde (diego.valverde.g@gmail.com)
|
Copyright (C) 2009 Diego Valverde (diego.valverde.g@gmail.com)
|
|
|
This program is free software; you can redistribute it and/or
|
This program is free software; you can redistribute it and/or
|
modify it under the terms of the GNU General Public License
|
modify it under the terms of the GNU General Public License
|
as published by the Free Software Foundation; either version 2
|
as published by the Free Software Foundation; either version 2
|
of the License, or (at your option) any later version.
|
of the License, or (at your option) any later version.
|
|
|
This program is distributed in the hope that it will be useful,
|
This program is distributed in the hope that it will be useful,
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
GNU General Public License for more details.
|
GNU General Public License for more details.
|
|
|
You should have received a copy of the GNU General Public License
|
You should have received a copy of the GNU General Public License
|
along with this program; if not, write to the Free Software
|
along with this program; if not, write to the Free Software
|
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
|
|
***********************************************************************************/
|
***********************************************************************************/
|
|
|
/**********************************************************************************
|
/**********************************************************************************
|
Module Description:
|
Module Description:
|
|
|
The scene geomtry is assumed to be grouped in a balance tree, specifically a
|
The scene geomtry is assumed to be grouped in a balance tree, specifically a
|
OCT tree.
|
OCT tree.
|
Geometry unit is responsible for traversing this tree and requesting the geoemtry
|
Geometry unit is responsible for traversing this tree and requesting the geoemtry
|
primitives accordingly.
|
primitives accordingly.
|
The root of the tree has global information on the scene, and each node
|
The root of the tree has global information on the scene, and each node
|
can have up to 8 child nodes. Leafs can have geometry on it or not depending on the
|
can have up to 8 child nodes. Leafs can have geometry on it or not depending on the
|
tree generation algorith.
|
tree generation algorith.
|
In the scenario where AABBIU is not used, the tree has a single node and a single leaf,
|
In the scenario where AABBIU is not used, the tree has a single node and a single leaf,
|
which is the the root of the tree.
|
which is the the root of the tree.
|
The geomrty unit groups a series of modules that are in charge of fetching
|
The geomrty unit groups a series of modules that are in charge of fetching
|
the various types of geometry. Depending on weather you are using AABBIU or not
|
the various types of geometry. Depending on weather you are using AABBIU or not
|
and wether you have texturing enabled or not, the way in which the primitives
|
and wether you have texturing enabled or not, the way in which the primitives
|
and data structures are requested varies.
|
and data structures are requested varies.
|
|
|
***********************************************************************************/
|
***********************************************************************************/
|
|
|
|
|
`timescale 1ns / 1ps
|
`timescale 1ns / 1ps
|
`include "aDefinitions.v"
|
`include "aDefinitions.v"
|
|
|
`define GFSM_SELECT_TFU 2'b00 //Triangle Fetch
|
`define GFSM_SELECT_TFU 2'b00 //Triangle Fetch
|
`define GFSM_SELECT_TFF 2'b01 //Texture Fetch
|
`define GFSM_SELECT_TFF 2'b01 //Texture Fetch
|
`define GFSM_SELECT_TNF 2'b10 //Tree node fetch
|
`define GFSM_SELECT_TNF 2'b10 //Tree node fetch
|
`define GFSM_SELECT_NULL 2'b11
|
`define GFSM_SELECT_NULL 2'b11
|
|
|
module GeometryUnit
|
module GeometryUnit
|
(
|
(
|
|
|
input wire Clock,
|
input wire Clock,
|
input wire Reset,
|
input wire Reset,
|
input wire iEnable,
|
input wire iEnable,
|
input wire iTexturingEnable,
|
input wire iTexturingEnable,
|
input wire [`WIDTH-1:0] iData_WBM,
|
input wire [`WIDTH-1:0] iData_WBM,
|
input wire iDataReady_WBM,
|
input wire iDataReady_WBM,
|
output wire [`WIDTH-1:0] oAddressWBM_Imm,
|
output wire [`WIDTH-1:0] oAddressWBM_Imm,
|
output wire oAddressWBM_IsImm,
|
output wire oAddressWBM_IsImm,
|
output wire [`DATA_ADDRESS_WIDTH-1:0] oAddressWBM_fromMEM,
|
output wire [`DATA_ADDRESS_WIDTH-1:0] oAddressWBM_fromMEM,
|
output wire oEnable_WBM,
|
output wire oEnable_WBM,
|
output wire oSetAddressWBM,
|
output wire oSetAddressWBM,
|
output wire oRequest_AABBIU,
|
output wire oRequest_AABBIU,
|
output wire oRequest_BIU,
|
output wire oRequest_BIU,
|
output wire oRequest_TCC,
|
output wire oRequest_TCC,
|
output wire[`DATA_ADDRESS_WIDTH-1:0] oRAMWriteAddress,
|
output wire[`DATA_ADDRESS_WIDTH-1:0] oRAMWriteAddress,
|
output wire oRAMWriteEnable,
|
output wire oRAMWriteEnable,
|
input wire iMicrocodeExecutionDone,
|
input wire iMicrocodeExecutionDone,
|
input wire iMicroCodeReturnValue,
|
input wire iMicroCodeReturnValue,
|
output wire oRequestingTextures,
|
output wire oRequestingTextures,
|
input wire iTrigger_TFF,
|
input wire iTrigger_TFF,
|
input wire iBIUHit,
|
input wire iBIUHit,
|
output wire oTFFDone,
|
output wire oTFFDone,
|
output wire oSync,
|
output wire oSync,
|
output wire oSetIOWriteBackAddr,
|
output wire oSetIOWriteBackAddr,
|
output wire oDone
|
output wire oDone
|
);
|
);
|
|
|
|
|
|
|
|
|
//Unit interconnections
|
//Unit interconnections
|
wire wTrigger_TNF; //Trigger Tree Node Fetch Unit. GSFM -> TNF
|
wire wTrigger_TNF; //Trigger Tree Node Fetch Unit. GSFM -> TNF
|
wire wTrigger_TFU; //Trigger Data Fetch Unit. GFSM -> TFU
|
wire wTrigger_TFU; //Trigger Data Fetch Unit. GFSM -> TFU
|
//wire wTrigger_TFF; //Trigger testure Fetch Unit. GFSM -> TFF
|
//wire wTrigger_TFF; //Trigger testure Fetch Unit. GFSM -> TFF
|
wire [`WIDTH-1:0] wNodeAddress; //Address of the current Node. GFSM -> TNF
|
wire [`WIDTH-1:0] wNodeAddress; //Address of the current Node. GFSM -> TNF
|
wire [`WIDTH-1:0] wTNF2_TFU__TriangleDataOffset; //Offset of the vertex Data. TNF -> GFSM
|
wire [`WIDTH-1:0] wTNF2_TFU__TriangleDataOffset; //Offset of the vertex Data. TNF -> GFSM
|
wire [`WIDTH-1:0] wNode_TriangleCount; //Number of traingles in this node. TNF -> GFSM
|
wire [`WIDTH-1:0] wNode_TriangleCount; //Number of traingles in this node. TNF -> GFSM
|
wire [`WIDTH-1:0] wNode_Brother_Address; //Address of the currents Node Brother. TNF -> GFSM
|
wire [`WIDTH-1:0] wNode_Brother_Address; //Address of the currents Node Brother. TNF -> GFSM
|
wire [`WIDTH-1:0] wParents_Brother_Address; //Address of the Brother of current node's parent. TNF -> GFSM
|
wire [`WIDTH-1:0] wParents_Brother_Address; //Address of the Brother of current node's parent. TNF -> GFSM
|
wire [`WIDTH-1:0] wAddress_TFU;
|
wire [`WIDTH-1:0] wAddress_TFU;
|
//wire [`DATA_ADDRESS_WIDTH-1:0] wAddress_TFF;
|
//wire [`DATA_ADDRESS_WIDTH-1:0] wAddress_TFF;
|
wire [`WIDTH-1:0] wAddress_TNF;
|
wire [`WIDTH-1:0] wAddress_TNF;
|
wire [`DATA_ADDRESS_WIDTH-1:0] wRAMWriteAddress_TFU;
|
wire [`DATA_ADDRESS_WIDTH-1:0] wRAMWriteAddress_TFU;
|
wire [`DATA_ADDRESS_WIDTH-1:0] wRAMWriteAddress_TFF;
|
wire [`DATA_ADDRESS_WIDTH-1:0] wRAMWriteAddress_TFF;
|
wire [`DATA_ADDRESS_WIDTH-1:0] wRAMWriteAddress_TNF;
|
wire [`DATA_ADDRESS_WIDTH-1:0] wRAMWriteAddress_TNF;
|
wire [1:0] wWBM_Address_Selector;
|
wire [1:0] wWBM_Address_Selector;
|
wire wTFN_Enable_WBM,wNode_IsLeaf;
|
wire wTFN_Enable_WBM,wNode_IsLeaf;
|
wire wTNF2__SetAddressWBM, wTFU2__SetAddressWBM,wTFF2__SetAddressWBM;
|
wire wTNF2__SetAddressWBM, wTFU2__SetAddressWBM,wTFF2__SetAddressWBM;
|
wire wRAMWriteEnable_TFF;
|
wire wRAMWriteEnable_TFF;
|
wire wNodeReadDone,wRAMWriteEnable_TNF,wTriangleReadDone,wTextureFetchDone;
|
wire wNodeReadDone,wRAMWriteEnable_TNF,wTriangleReadDone,wTextureFetchDone;
|
wire wTFU_Trigger_WBM,wTFF_Trigger_WBM,wRAMWriteEnable_TFU;
|
wire wTFU_Trigger_WBM,wTFF_Trigger_WBM,wRAMWriteEnable_TFU;
|
wire wGFSM2_TFU__SetAddressOffset;
|
wire wGFSM2_TFU__SetAddressOffset;
|
|
|
assign oEnable_WBM = wTFN_Enable_WBM ^ wTFU_Trigger_WBM ^ wTFF_Trigger_WBM; //XXX TODO: Wath out!
|
assign oEnable_WBM = wTFN_Enable_WBM ^ wTFU_Trigger_WBM ^ wTFF_Trigger_WBM; //XXX TODO: Wath out!
|
|
|
|
|
assign oRequestingTextures = (wWBM_Address_Selector == `GFSM_SELECT_TFF ) ? 1 : 0;
|
assign oRequestingTextures = (wWBM_Address_Selector == `GFSM_SELECT_TFF ) ? 1 : 0;
|
assign oAddressWBM_Imm = ( wWBM_Address_Selector == `GFSM_SELECT_TFU ) ? wAddress_TFU : wAddress_TNF;
|
assign oAddressWBM_Imm = ( wWBM_Address_Selector == `GFSM_SELECT_TFU ) ? wAddress_TFU : wAddress_TNF;
|
assign oRAMWriteEnable = ( wWBM_Address_Selector == `GFSM_SELECT_TFU ) ? wRAMWriteEnable_TFU : wRAMWriteEnable_TNF;
|
assign oRAMWriteEnable = ( wWBM_Address_Selector == `GFSM_SELECT_TFU ) ? wRAMWriteEnable_TFU : wRAMWriteEnable_TNF;
|
|
|
assign oAddressWBM_IsImm =
|
assign oAddressWBM_IsImm =
|
( !iTexturingEnable || (iTexturingEnable &&
|
( !iTexturingEnable || (iTexturingEnable &&
|
(wWBM_Address_Selector == `GFSM_SELECT_TFU || wWBM_Address_Selector == `GFSM_SELECT_TNF) ))
|
(wWBM_Address_Selector == `GFSM_SELECT_TFU || wWBM_Address_Selector == `GFSM_SELECT_TNF) ))
|
? 1'b1 : 1'b0;
|
? 1'b1 : 1'b0;
|
|
|
//--------------------------------------------------------
|
//--------------------------------------------------------
|
//Mux for oRAMWriteAddress
|
//Mux for oRAMWriteAddress
|
MUXFULLPARALELL_16bits_2SEL_X MUXGE_1B
|
MUXFULLPARALELL_16bits_2SEL_X MUXGE_1B
|
(
|
(
|
.I1( wRAMWriteAddress_TFU ),
|
.I1( wRAMWriteAddress_TFU ),
|
.I2( wRAMWriteAddress_TFF ),
|
.I2( wRAMWriteAddress_TFF ),
|
.I3( wRAMWriteAddress_TNF ),
|
.I3( wRAMWriteAddress_TNF ),
|
.O1( oRAMWriteAddress ),
|
.O1( oRAMWriteAddress ),
|
.Sel( wWBM_Address_Selector )
|
.Sel( wWBM_Address_Selector )
|
);
|
);
|
|
|
//--------------------------------------------------------
|
//--------------------------------------------------------
|
|
|
assign oSetAddressWBM = wTNF2__SetAddressWBM | wTFU2__SetAddressWBM | wTFF2__SetAddressWBM;
|
assign oSetAddressWBM = wTNF2__SetAddressWBM | wTFU2__SetAddressWBM | wTFF2__SetAddressWBM;
|
|
|
|
|
//------------------------------------------------
|
//------------------------------------------------
|
|
|
/*
|
/*
|
Tree node fetcher: Takes care of resquesting
|
Tree node fetcher: Takes care of resquesting
|
node information. TNF requests Read Bus Cycles
|
node information. TNF requests Read Bus Cycles
|
from the Wish Bone Master Unit. TNF is controlled
|
from the Wish Bone Master Unit. TNF is controlled
|
by the GFSM.
|
by the GFSM.
|
*/
|
*/
|
TreeNodeFetcher TNF
|
TreeNodeFetcher TNF
|
(
|
(
|
.Clock( Clock ),
|
.Clock( Clock ),
|
.Reset( Reset ),
|
.Reset( Reset ),
|
.iData( iData_WBM ),
|
.iData( iData_WBM ),
|
.iDataAvailable( iDataReady_WBM ),
|
.iDataAvailable( iDataReady_WBM ),
|
.oEnableWBM( wTFN_Enable_WBM ),
|
.oEnableWBM( wTFN_Enable_WBM ),
|
.oSetAddressWBM( wTNF2__SetAddressWBM ),
|
.oSetAddressWBM( wTNF2__SetAddressWBM ),
|
.oAddressWBM( wAddress_TNF ),
|
.oAddressWBM( wAddress_TNF ),
|
.iInitialAddress( wNodeAddress ),
|
.iInitialAddress( wNodeAddress ),
|
.iTrigger( wTrigger_TNF ),
|
.iTrigger( wTrigger_TNF ),
|
.oNode_IsLeaf( wNode_IsLeaf ),
|
.oNode_IsLeaf( wNode_IsLeaf ),
|
.oNodeReadDone( wNodeReadDone ),
|
.oNodeReadDone( wNodeReadDone ),
|
.oNode_TriangleCount( wNode_TriangleCount ),
|
.oNode_TriangleCount( wNode_TriangleCount ),
|
.oNode_Brother_Address( wNode_Brother_Address ),
|
.oNode_Brother_Address( wNode_Brother_Address ),
|
.oParents_Brother_Address( wParents_Brother_Address ),
|
.oParents_Brother_Address( wParents_Brother_Address ),
|
.oNode_DataOffset( wTNF2_TFU__TriangleDataOffset ),
|
.oNode_DataOffset( wTNF2_TFU__TriangleDataOffset ),
|
.oRAMWriteEnable( wRAMWriteEnable_TNF ),
|
.oRAMWriteEnable( wRAMWriteEnable_TNF ),
|
.oRAMWriteAddress( wRAMWriteAddress_TNF )
|
.oRAMWriteAddress( wRAMWriteAddress_TNF )
|
|
|
);
|
);
|
//------------------------------------------------
|
//------------------------------------------------
|
/*
|
/*
|
Triangle Fetch Unit: Takes care of resquesting
|
Triangle Fetch Unit: Takes care of resquesting
|
triangle information. TFU requests Read Bus Cycles
|
triangle information. TFU requests Read Bus Cycles
|
from the Wish Bone Master Unit. TFU is controlled
|
from the Wish Bone Master Unit. TFU is controlled
|
by the GFSM.
|
by the GFSM.
|
*/
|
*/
|
TriangleFetchUnit TFU
|
TriangleFetchUnit TFU
|
(
|
(
|
.Clock( Clock ),
|
.Clock( Clock ),
|
.Reset( Reset ),
|
.Reset( Reset ),
|
.iTrigger( wTrigger_TFU ),
|
.iTrigger( wTrigger_TFU ),
|
.iInitialAddress( wTNF2_TFU__TriangleDataOffset ),
|
.iInitialAddress( wTNF2_TFU__TriangleDataOffset ),
|
.iSetAddressOffset( wGFSM2_TFU__SetAddressOffset ),
|
.iSetAddressOffset( wGFSM2_TFU__SetAddressOffset ),
|
.iDataAvailable( iDataReady_WBM ),
|
.iDataAvailable( iDataReady_WBM ),
|
.oAddressWBM( wAddress_TFU ),
|
.oAddressWBM( wAddress_TFU ),
|
.oSetAddressWBM( wTFU2__SetAddressWBM ),
|
.oSetAddressWBM( wTFU2__SetAddressWBM ),
|
.oTriggerWBM( wTFU_Trigger_WBM ),
|
.oTriggerWBM( wTFU_Trigger_WBM ),
|
.oRAMWriteEnable( wRAMWriteEnable_TFU ),
|
.oRAMWriteEnable( wRAMWriteEnable_TFU ),
|
.iCR_TextureMappingEnabled( iTexturingEnable ),
|
.iCR_TextureMappingEnabled( iTexturingEnable ),
|
.oRAMWriteAddress( wRAMWriteAddress_TFU ),
|
.oRAMWriteAddress( wRAMWriteAddress_TFU ),
|
.oDone( wTriangleReadDone )
|
.oDone( wTriangleReadDone )
|
);
|
);
|
|
|
//------------------------------------------------
|
//------------------------------------------------
|
/*
|
/*
|
Geometry Fetch Finite State Machine: Takes care of resquesting
|
Geometry Fetch Finite State Machine: Takes care of resquesting
|
the control of the various geometry fetching routines. It controls
|
the control of the various geometry fetching routines. It controls
|
TFF,TFU and TNF.
|
TFF,TFU and TNF.
|
*/
|
*/
|
GeometryFetchFSM GFSM //TODO: Add new states to fetch the texures
|
GeometryFetchFSM GFSM //TODO: Add new states to fetch the texures
|
(
|
(
|
.Clock( Clock ),
|
.Clock( Clock ),
|
.Reset( Reset ),
|
.Reset( Reset ),
|
.iBIUHit( iBIUHit ),
|
.iBIUHit( iBIUHit ),
|
.iTexturingEnable( iTexturingEnable ),
|
.iTexturingEnable( iTexturingEnable ),
|
.iEnable( iEnable ),
|
.iEnable( iEnable ),
|
.iAABBIUHit( iMicroCodeReturnValue ),
|
.iAABBIUHit( iMicroCodeReturnValue ),
|
.iUCodeDone( iMicrocodeExecutionDone ),
|
.iUCodeDone( iMicrocodeExecutionDone ),
|
.iTriangleReadDone( wTriangleReadDone ),
|
.iTriangleReadDone( wTriangleReadDone ),
|
.iNode_TriangleCount( wNode_TriangleCount ),
|
.iNode_TriangleCount( wNode_TriangleCount ),
|
.iNode_Brother_Address( wNode_Brother_Address ),
|
.iNode_Brother_Address( wNode_Brother_Address ),
|
.iNode_Parents_Brother_Address( wParents_Brother_Address ),
|
.iNode_Parents_Brother_Address( wParents_Brother_Address ),
|
.iNode_IsLeaf( wNode_IsLeaf ),
|
.iNode_IsLeaf( wNode_IsLeaf ),
|
.iNodeReadDone( wNodeReadDone ),
|
.iNodeReadDone( wNodeReadDone ),
|
.oTrigger_TNF( wTrigger_TNF ),
|
.oTrigger_TNF( wTrigger_TNF ),
|
.oTrigger_TFU( wTrigger_TFU ),
|
.oTrigger_TFU( wTrigger_TFU ),
|
.oNodeAddress( wNodeAddress ),
|
.oNodeAddress( wNodeAddress ),
|
.oRequest_AABBIU( oRequest_AABBIU ),
|
.oRequest_AABBIU( oRequest_AABBIU ),
|
.oRequest_BIU( oRequest_BIU ),
|
.oRequest_BIU( oRequest_BIU ),
|
.oRequest_TCC( oRequest_TCC ),
|
.oRequest_TCC( oRequest_TCC ),
|
.oWBM_Addr_Selector( wWBM_Address_Selector ),
|
.oWBM_Addr_Selector( wWBM_Address_Selector ),
|
.oSync( oSync ),
|
.oSync( oSync ),
|
.oSetTFUAddressOffset( wGFSM2_TFU__SetAddressOffset ),
|
.oSetTFUAddressOffset( wGFSM2_TFU__SetAddressOffset ),
|
.oDone( oDone ),
|
.oDone( oDone ),
|
.iDataAvailable( iDataReady_WBM ),
|
.iDataAvailable( iDataReady_WBM ),
|
.oEnable_WBM( wTFF_Trigger_WBM ),
|
.oEnable_WBM( wTFF_Trigger_WBM ),
|
.oAddressWBM( oAddressWBM_fromMEM ),
|
.oAddressWBM( oAddressWBM_fromMEM ),
|
.oSetAddressWBM( wTFF2__SetAddressWBM ),
|
.oSetAddressWBM( wTFF2__SetAddressWBM ),
|
.iTrigger_TFF( iTrigger_TFF ),
|
.iTrigger_TFF( iTrigger_TFF ),
|
.oSetIOWriteBackAddr( oSetIOWriteBackAddr ),
|
.oSetIOWriteBackAddr( oSetIOWriteBackAddr ),
|
.oRAMTextureStoreLocation( wRAMWriteAddress_TFF )
|
.oRAMTextureStoreLocation( wRAMWriteAddress_TFF )
|
|
|
);
|
);
|
assign oTFFDone = oDone;
|
assign oTFFDone = oDone;
|
|
|
//-------------------------------------------------
|
//-------------------------------------------------
|
|
|
|
|
endmodule
|
endmodule
|
|
|
