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    from Rev 329 to Rev 328
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Rev 329 → Rev 328

/trunk/rtl/verilog/eth_wishbone.v
41,9 → 41,6
// CVS Revision History
//
// $Log: not supported by cvs2svn $
// Revision 1.56 2004/04/30 10:30:00 igorm
// Accidently deleted line put back.
//
// Revision 1.55 2004/04/26 15:26:23 igorm
// - Bug connected to the TX_BD_NUM_Wr signal fixed (bug came in with the
// previous update of the core.
289,7 → 286,7
ReceivedPauseFrm,
// Tx Status
RetryCntLatched, RetryLimit, LateCollLatched, DeferLatched, RstDeferLatched, CarrierSenseLost
RetryCntLatched, RetryLimit, LateCollLatched, DeferLatched, CarrierSenseLost
 
// Bist
`ifdef ETH_BIST
320,7 → 317,7
output WB_ACK_O; // WISHBONE acknowledge output
 
// WISHBONE master
output [29:0] m_wb_adr_o; //
output [31:0] m_wb_adr_o; //
output [3:0] m_wb_sel_o; //
output m_wb_we_o; //
output [31:0] m_wb_dat_o; //
358,7 → 355,6
input RetryLimit; // Retry limit reached (Retry Max value + 1 attempts were made)
input LateCollLatched; // Late collision occured
input DeferLatched; // Defer indication (Frame was defered before sucessfully sent)
output RstDeferLatched;
input CarrierSenseLost; // Carrier Sense was lost during the frame transmission
 
// Tx
456,8 → 452,8
 
reg Flop;
 
reg [7:1] TxBDAddress;
reg [7:1] RxBDAddress;
reg [7:0] TxBDAddress;
reg [7:0] RxBDAddress;
 
reg TxRetrySync1;
reg TxAbortSync1;
506,13 → 502,10
 
wire [1:0] TxValidBytes;
 
wire [7:1] TempTxBDAddress;
wire [7:1] TempRxBDAddress;
wire [7:0] TempTxBDAddress;
wire [7:0] TempRxBDAddress;
 
wire RxStatusWrite;
wire RxBufferFull;
wire RxBufferAlmostEmpty;
wire RxBufferEmpty;
 
reg WB_ACK_O;
 
544,7 → 537,6
assign m_wb_bte_o = 2'b00; // Linear burst
`endif
 
assign m_wb_stb_o = m_wb_cyc_o;
 
always @ (posedge WB_CLK_I)
begin
603,7 → 595,7
WbEn <=#Tp 1'b0;
RxEn <=#Tp 1'b1; // wb access stage and r_RxEn is enabled
TxEn <=#Tp 1'b0;
ram_addr <=#Tp {RxBDAddress, RxPointerRead};
ram_addr <=#Tp RxBDAddress + RxPointerRead;
ram_di <=#Tp RxBDDataIn;
end
5'b100_01 :
611,7 → 603,7
WbEn <=#Tp 1'b0;
RxEn <=#Tp 1'b0;
TxEn <=#Tp 1'b1; // wb access stage, r_RxEn is disabled but r_TxEn is enabled
ram_addr <=#Tp {TxBDAddress, TxPointerRead};
ram_addr <=#Tp TxBDAddress + TxPointerRead;
ram_di <=#Tp TxBDDataIn;
end
5'b010_00, 5'b010_10 :
629,7 → 621,7
WbEn <=#Tp 1'b0;
RxEn <=#Tp 1'b0;
TxEn <=#Tp 1'b1; // RxEn access stage and r_TxEn is enabled
ram_addr <=#Tp {TxBDAddress, TxPointerRead};
ram_addr <=#Tp TxBDAddress + TxPointerRead;
ram_di <=#Tp TxBDDataIn;
end
5'b001_00, 5'b001_01, 5'b001_10, 5'b001_11 :
766,7 → 758,6
 
reg BlockingTxStatusWrite_sync1;
reg BlockingTxStatusWrite_sync2;
reg BlockingTxStatusWrite_sync3;
 
// Synchronizing BlockingTxStatusWrite to MTxClk
always @ (posedge MTxClk or posedge Reset)
786,17 → 777,7
BlockingTxStatusWrite_sync2 <=#Tp BlockingTxStatusWrite_sync1;
end
 
// Synchronizing BlockingTxStatusWrite to MTxClk
always @ (posedge MTxClk or posedge Reset)
begin
if(Reset)
BlockingTxStatusWrite_sync3 <=#Tp 1'b0;
else
BlockingTxStatusWrite_sync3 <=#Tp BlockingTxStatusWrite_sync2;
end
 
assign RstDeferLatched = BlockingTxStatusWrite_sync2 & ~BlockingTxStatusWrite_sync3;
 
// TxBDRead state is activated only once.
always @ (posedge WB_CLK_I or posedge Reset)
begin
828,8 → 809,9
reg MasterWbTX;
reg MasterWbRX;
 
reg [29:0] m_wb_adr_o;
reg [31:0] m_wb_adr_o;
reg m_wb_cyc_o;
reg m_wb_stb_o;
reg [3:0] m_wb_sel_o;
reg m_wb_we_o;
 
1019,8 → 1001,9
begin
MasterWbTX <=#Tp 1'b0;
MasterWbRX <=#Tp 1'b0;
m_wb_adr_o <=#Tp 30'h0;
m_wb_adr_o <=#Tp 32'h0;
m_wb_cyc_o <=#Tp 1'b0;
m_wb_stb_o <=#Tp 1'b0;
m_wb_we_o <=#Tp 1'b0;
m_wb_sel_o <=#Tp 4'h0;
cyc_cleared<=#Tp 1'b0;
1045,15 → 1028,16
MasterWbTX <=#Tp 1'b1; // tx burst
MasterWbRX <=#Tp 1'b0;
m_wb_cyc_o <=#Tp 1'b1;
m_wb_stb_o <=#Tp 1'b1;
m_wb_we_o <=#Tp 1'b0;
m_wb_sel_o <=#Tp 4'hf;
cyc_cleared<=#Tp 1'b0;
IncrTxPointer<=#Tp 1'b1;
tx_burst_cnt <=#Tp tx_burst_cnt+3'h1;
tx_burst_cnt <=#Tp tx_burst_cnt+1;
if(tx_burst_cnt==0)
m_wb_adr_o <=#Tp TxPointerMSB;
m_wb_adr_o <=#Tp {TxPointerMSB, 2'h0};
else
m_wb_adr_o <=#Tp m_wb_adr_o+1'b1;
m_wb_adr_o <=#Tp m_wb_adr_o+3'h4;
 
if(tx_burst_cnt==(`ETH_BURST_LENGTH-1))
begin
1077,16 → 1061,17
MasterWbTX <=#Tp 1'b0; // rx burst
MasterWbRX <=#Tp 1'b1;
m_wb_cyc_o <=#Tp 1'b1;
m_wb_stb_o <=#Tp 1'b1;
m_wb_we_o <=#Tp 1'b1;
m_wb_sel_o <=#Tp RxByteSel;
IncrTxPointer<=#Tp 1'b0;
cyc_cleared<=#Tp 1'b0;
rx_burst_cnt <=#Tp rx_burst_cnt+3'h1;
rx_burst_cnt <=#Tp rx_burst_cnt+1;
 
if(rx_burst_cnt==0)
m_wb_adr_o <=#Tp RxPointerMSB;
m_wb_adr_o <=#Tp {RxPointerMSB, 2'h0};
else
m_wb_adr_o <=#Tp m_wb_adr_o+1'b1;
m_wb_adr_o <=#Tp m_wb_adr_o+3'h4;
 
if(rx_burst_cnt==(`ETH_BURST_LENGTH-1))
begin
1106,8 → 1091,9
begin
MasterWbTX <=#Tp 1'b0;
MasterWbRX <=#Tp 1'b1;
m_wb_adr_o <=#Tp RxPointerMSB;
m_wb_adr_o <=#Tp {RxPointerMSB, 2'h0};
m_wb_cyc_o <=#Tp 1'b1;
m_wb_stb_o <=#Tp 1'b1;
m_wb_we_o <=#Tp 1'b1;
m_wb_sel_o <=#Tp RxByteSel;
IncrTxPointer<=#Tp 1'b0;
1116,8 → 1102,9
begin
MasterWbTX <=#Tp 1'b1;
MasterWbRX <=#Tp 1'b0;
m_wb_adr_o <=#Tp TxPointerMSB;
m_wb_adr_o <=#Tp {TxPointerMSB, 2'h0};
m_wb_cyc_o <=#Tp 1'b1;
m_wb_stb_o <=#Tp 1'b1;
m_wb_we_o <=#Tp 1'b0;
m_wb_sel_o <=#Tp 4'hf;
IncrTxPointer<=#Tp 1'b1;
1127,8 → 1114,9
begin
MasterWbTX <=#Tp 1'b1;
MasterWbRX <=#Tp 1'b0;
m_wb_adr_o <=#Tp TxPointerMSB;
m_wb_adr_o <=#Tp {TxPointerMSB, 2'h0};
m_wb_cyc_o <=#Tp 1'b1;
m_wb_stb_o <=#Tp 1'b1;
m_wb_we_o <=#Tp 1'b0;
m_wb_sel_o <=#Tp 4'hf;
cyc_cleared<=#Tp 1'b0;
1139,8 → 1127,9
begin
MasterWbTX <=#Tp 1'b0;
MasterWbRX <=#Tp 1'b1;
m_wb_adr_o <=#Tp RxPointerMSB;
m_wb_adr_o <=#Tp {RxPointerMSB, 2'h0};
m_wb_cyc_o <=#Tp 1'b1;
m_wb_stb_o <=#Tp 1'b1;
m_wb_we_o <=#Tp 1'b1;
m_wb_sel_o <=#Tp RxByteSel;
cyc_cleared<=#Tp 1'b0;
1152,6 → 1141,7
8'b10_x1_10_0x : // MR and MR or MW or MWB (cycle is cleared between previous and next access)
begin
m_wb_cyc_o <=#Tp 1'b0; // whatever and master read or write is needed. We need to clear m_wb_cyc_o before next access is started
m_wb_stb_o <=#Tp 1'b0;
cyc_cleared<=#Tp 1'b1;
IncrTxPointer<=#Tp 1'b0;
tx_burst_cnt<=#Tp 0;
1168,6 → 1158,7
MasterWbTX <=#Tp 1'b0;
MasterWbRX <=#Tp 1'b0;
m_wb_cyc_o <=#Tp 1'b0;
m_wb_stb_o <=#Tp 1'b0;
cyc_cleared<=#Tp 1'b0;
IncrTxPointer<=#Tp 1'b0;
rx_burst_cnt<=#Tp 0;
1186,6 → 1177,7
MasterWbTX <=#Tp MasterWbTX;
MasterWbRX <=#Tp MasterWbRX;
m_wb_cyc_o <=#Tp m_wb_cyc_o;
m_wb_stb_o <=#Tp m_wb_stb_o;
m_wb_sel_o <=#Tp m_wb_sel_o;
IncrTxPointer<=#Tp IncrTxPointer;
end
1354,9 → 1346,9
 
 
// Temporary Tx and Rx buffer descriptor address
assign TempTxBDAddress[7:1] = {7{ TxStatusWrite & ~WrapTxStatusBit}} & (TxBDAddress + 1'b1) ; // Tx BD increment or wrap (last BD)
assign TempRxBDAddress[7:1] = {7{ WrapRxStatusBit}} & (r_TxBDNum[6:0]) | // Using first Rx BD
{7{~WrapRxStatusBit}} & (RxBDAddress + 1'b1) ; // Using next Rx BD (incremenrement address)
assign TempTxBDAddress[7:0] = {8{ TxStatusWrite & ~WrapTxStatusBit}} & (TxBDAddress + 2'h2) ; // Tx BD increment or wrap (last BD)
assign TempRxBDAddress[7:0] = {8{ WrapRxStatusBit}} & (r_TxBDNum<<1) | // Using first Rx BD
{8{~WrapRxStatusBit}} & (RxBDAddress + 2'h2) ; // Using next Rx BD (incremenrement address)
 
 
// Latching Tx buffer descriptor address
1363,9 → 1355,9
always @ (posedge WB_CLK_I or posedge Reset)
begin
if(Reset)
TxBDAddress <=#Tp 7'h0;
TxBDAddress <=#Tp 8'h0;
else if (r_TxEn & (~r_TxEn_q))
TxBDAddress <=#Tp 7'h0;
TxBDAddress <=#Tp 8'h0;
else if (TxStatusWrite)
TxBDAddress <=#Tp TempTxBDAddress;
end
1375,9 → 1367,9
always @ (posedge WB_CLK_I or posedge Reset)
begin
if(Reset)
RxBDAddress <=#Tp 7'h0;
RxBDAddress <=#Tp 8'h0;
else if(r_RxEn & (~r_RxEn_q))
RxBDAddress <=#Tp r_TxBDNum[6:0];
RxBDAddress <=#Tp r_TxBDNum << 1;
else if(RxStatusWrite)
RxBDAddress <=#Tp TempRxBDAddress;
end
1915,7 → 1907,7
RxPointerMSB <=#Tp ram_do[31:2];
else
if(MasterWbRX & m_wb_ack_i)
RxPointerMSB <=#Tp RxPointerMSB + 1'b1; // Word access (always word access. m_wb_sel_o are used for selecting bytes)
RxPointerMSB <=#Tp RxPointerMSB + 1; // Word access (always word access. m_wb_sel_o are used for selecting bytes)
end
 
 
2037,7 → 2029,7
endcase
else
if(RxValid & ~LastByteIn & ~RxStartFrm & RxEnableWindow)
RxValidBytes <=#Tp RxValidBytes + 1'b1;
RxValidBytes <=#Tp RxValidBytes + 1;
end
 
 

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