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ad_mem_asym: Improve the implementation of the asymmetric RAM 

Because the read interface got a read enable port too, update all the
ad_mem_asym instances.
main
Istvan Csomortani 2018-07-19 14:44:04 +01:00 committed by István Csomortáni
parent e092149cbc
commit c152b60137
6 changed files with 72 additions and 80 deletions
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119
library/common/ad_mem_asym.v
View File

@ -51,23 +51,45 @@ module ad_mem_asym #(
input [A_DATA_WIDTH-1:0] dina,
input clkb,
input reb,
input [B_ADDRESS_WIDTH-1:0] addrb,
output reg [B_DATA_WIDTH-1:0] doutb);
localparam MEM_ADDRESS_WIDTH = (A_ADDRESS_WIDTH > B_ADDRESS_WIDTH) ? A_ADDRESS_WIDTH : B_ADDRESS_WIDTH;
localparam MEM_DATA_WIDTH = (A_DATA_WIDTH > B_DATA_WIDTH) ? B_DATA_WIDTH : A_DATA_WIDTH;
`define max(a,b) {(a) > (b) ? (a) : (b)}
`define min(a,b) {(a) < (b) ? (a) : (b)}
function integer clog2;
input integer value;
begin
if (value < 2)
clog2 = value;
else begin
value = value - 1;
for (clog2 = 0; value > 0; clog2 = clog2 + 1)
value = value >> 1;
end
end
endfunction
localparam MEM_ADDRESS_WIDTH = `max(A_ADDRESS_WIDTH, B_ADDRESS_WIDTH);
localparam MIN_WIDTH = `min(A_DATA_WIDTH, B_DATA_WIDTH);
localparam MAX_WIDTH = `max(A_DATA_WIDTH, B_DATA_WIDTH);
localparam MEM_DATA_WIDTH = MIN_WIDTH;
localparam MEM_SIZE = 2 ** MEM_ADDRESS_WIDTH;
localparam MEM_RATIO = (A_DATA_WIDTH > B_DATA_WIDTH) ? A_DATA_WIDTH/B_DATA_WIDTH : B_DATA_WIDTH/A_DATA_WIDTH;
localparam MEM_IO_COMP = (A_DATA_WIDTH > B_DATA_WIDTH) ? 1'b1 : 1'b0;
localparam MEM_RATIO = MAX_WIDTH / MIN_WIDTH;
localparam MEM_RATIO_LOG2 = clog2(MEM_RATIO);
// internal registers
reg [MEM_DATA_WIDTH-1:0] m_ram[0:MEM_SIZE-1];
// write interface options
//---------------------------------------------------------------------------
// write interface
//---------------------------------------------------------------------------
generate if (MEM_IO_COMP == 0) begin
// write data width is narrower than read data width
generate if (A_DATA_WIDTH <= B_DATA_WIDTH) begin
always @(posedge clka) begin
if (wea == 1'b1) begin
m_ram[addra] <= dina;
@ -76,81 +98,46 @@ module ad_mem_asym #(
end
endgenerate
generate if ((MEM_IO_COMP == 1) && (MEM_RATIO == 2)) begin
always @(posedge clka) begin
if (wea == 1'b1) begin
m_ram[{addra, 1'd0}] <= dina[((1*B_DATA_WIDTH)-1):(B_DATA_WIDTH*0)];
m_ram[{addra, 1'd1}] <= dina[((2*B_DATA_WIDTH)-1):(B_DATA_WIDTH*1)];
// write data width is wider than read data width
generate if (A_DATA_WIDTH > B_DATA_WIDTH) begin
always @(posedge clka) begin : memwrite
integer i;
reg [MEM_RATIO_LOG2-1:0] lsb;
for (i = 0; i < MEM_RATIO; i = i + 1) begin : awrite
lsb = i;
if (wea) begin
m_ram[{addra, lsb}] <= dina[i * MIN_WIDTH +: MIN_WIDTH];
end
end
end
end
endgenerate
generate if ((MEM_IO_COMP == 1) && (MEM_RATIO == 4)) begin
always @(posedge clka) begin
if (wea == 1'b1) begin
m_ram[{addra, 2'd0}] <= dina[((1*B_DATA_WIDTH)-1):(B_DATA_WIDTH*0)];
m_ram[{addra, 2'd1}] <= dina[((2*B_DATA_WIDTH)-1):(B_DATA_WIDTH*1)];
m_ram[{addra, 2'd2}] <= dina[((3*B_DATA_WIDTH)-1):(B_DATA_WIDTH*2)];
m_ram[{addra, 2'd3}] <= dina[((4*B_DATA_WIDTH)-1):(B_DATA_WIDTH*3)];
end
end
end
endgenerate
//---------------------------------------------------------------------------
// read interface
//---------------------------------------------------------------------------
generate if ((MEM_IO_COMP == 1) && (MEM_RATIO == 8)) begin
always @(posedge clka) begin
if (wea == 1'b1) begin
m_ram[{addra, 3'd0}] <= dina[((1*B_DATA_WIDTH)-1):(B_DATA_WIDTH*0)];
m_ram[{addra, 3'd1}] <= dina[((2*B_DATA_WIDTH)-1):(B_DATA_WIDTH*1)];
m_ram[{addra, 3'd2}] <= dina[((3*B_DATA_WIDTH)-1):(B_DATA_WIDTH*2)];
m_ram[{addra, 3'd3}] <= dina[((4*B_DATA_WIDTH)-1):(B_DATA_WIDTH*3)];
m_ram[{addra, 3'd4}] <= dina[((5*B_DATA_WIDTH)-1):(B_DATA_WIDTH*4)];
m_ram[{addra, 3'd5}] <= dina[((6*B_DATA_WIDTH)-1):(B_DATA_WIDTH*5)];
m_ram[{addra, 3'd6}] <= dina[((7*B_DATA_WIDTH)-1):(B_DATA_WIDTH*6)];
m_ram[{addra, 3'd7}] <= dina[((8*B_DATA_WIDTH)-1):(B_DATA_WIDTH*7)];
end
end
end
endgenerate
// read interface options
generate if ((MEM_IO_COMP == 1) || (MEM_RATIO == 1)) begin
// read data width is narrower than write data width
generate if (A_DATA_WIDTH >= B_DATA_WIDTH) begin
always @(posedge clkb) begin
if (reb == 1'b1) begin
doutb <= m_ram[addrb];
end
end
endgenerate
generate if ((MEM_IO_COMP == 0) && (MEM_RATIO == 2)) begin
always @(posedge clkb) begin
doutb <= {m_ram[{addrb, 1'd1}],
m_ram[{addrb, 1'd0}]};
end
end
endgenerate
generate if ((MEM_IO_COMP == 0) && (MEM_RATIO == 4)) begin
always @(posedge clkb) begin
doutb <= {m_ram[{addrb, 2'd3}],
m_ram[{addrb, 2'd2}],
m_ram[{addrb, 2'd1}],
m_ram[{addrb, 2'd0}]};
// read data width is wider than write data width
generate if (A_DATA_WIDTH < B_DATA_WIDTH) begin
always @(posedge clkb) begin : memread
integer i;
reg [MEM_RATIO_LOG2-1:0] lsb;
for (i = 0; i < MEM_RATIO; i = i + 1) begin : aread
lsb = i;
if (reb == 1'b1) begin
doutb[i*MIN_WIDTH +: MIN_WIDTH] <= m_ram[{addrb, lsb}];
end
end
endgenerate
generate if ((MEM_IO_COMP == 0) && (MEM_RATIO == 8)) begin
always @(posedge clkb) begin
doutb <= {m_ram[{addrb, 3'd7}],
m_ram[{addrb, 3'd6}],
m_ram[{addrb, 3'd5}],
m_ram[{addrb, 3'd4}],
m_ram[{addrb, 3'd3}],
m_ram[{addrb, 3'd2}],
m_ram[{addrb, 3'd1}],
m_ram[{addrb, 3'd0}]};
end
end
endgenerate

1
library/util_adcfifo/util_adcfifo.v
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@ -213,6 +213,7 @@ module util_adcfifo #(
.addra (adc_waddr_int),
.dina (adc_wdata_int),
.clkb (dma_clk),
.reb (1'b1),
.addrb (dma_raddr),
.doutb (dma_rdata_s));
end

1
library/xilinx/axi_adcfifo/axi_adcfifo_dma.v
View File

@ -198,6 +198,7 @@ module axi_adcfifo_dma #(
.addra (axi_waddr),
.dina (axi_ddata),
.clkb (dma_clk),
.reb (1'b1),
.addrb (dma_raddr),
.doutb (dma_rdata_s));

1
library/xilinx/axi_dacfifo/axi_dacfifo_rd.v
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@ -162,6 +162,7 @@ module axi_dacfifo_rd #(
.addra (axi_mem_waddr),
.dina (axi_rdata),
.clkb (dac_clk),
.reb (1'b1),
.addrb (dac_mem_raddr),
.doutb (dac_data));

1
library/xilinx/axi_dacfifo/axi_dacfifo_wr.v
View File

@ -188,6 +188,7 @@ module axi_dacfifo_wr #(
.addra (dma_mem_waddr),
.dina (dma_data),
.clkb (axi_clk),
.reb (1'b1),
.addrb (axi_mem_raddr),
.doutb (axi_mem_rdata_s));

1
library/xilinx/axi_dacfifo/util_dacfifo_bypass.v
View File

@ -118,6 +118,7 @@ module util_dacfifo_bypass #(
.addra (dma_mem_waddr),
.dina (dma_data),
.clkb (dac_clk),
.reb (1'b1),
.addrb (dac_mem_raddr),
.doutb (dac_mem_rdata_s));