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fpga: Increase fw_ram to 4 kBytes

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Signed-off-by: Joachim Strömbergson <joachim@assured.se>
This commit is contained in:
Joachim Strömbergson 2024-07-11 14:20:00 +02:00
parent b5ba21148d
commit 15765c3068
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GPG Key ID: 865B8A548EA61679
2 changed files with 107 additions and 27 deletions
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2
hw/application_fpga/rtl/application_fpga.v
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@ -127,7 +127,7 @@ module application_fpga(
reg fw_ram_cs;
reg [3 : 0] fw_ram_we;
reg [8 : 0] fw_ram_address;
reg [9 : 0] fw_ram_address;
reg [31 : 0] fw_ram_write_data;
wire [31 : 0] fw_ram_read_data;
wire fw_ram_ready;

98
hw/application_fpga/rtl/fw_ram.v
View File

@ -2,7 +2,7 @@
//
// fw_ram.v
// --------
// A 512 x 32 RAM (2048 bytes) for use by the FW. The memory has
// A 1024 x 32 bit RAM (4096 bytes) for use by the FW. The memory has
// support for mode based access control.
//
// Author: Joachim Strombergson
@ -21,7 +21,7 @@ module fw_ram(
input wire cs,
input wire [3 : 0] we,
input wire [8 : 0] address,
input wire [9 : 0] address,
input wire [31 : 0] write_data,
output wire [31 : 0] read_data,
output wire ready
@ -34,10 +34,14 @@ module fw_ram(
reg [31 : 0] tmp_read_data;
reg [31 : 0] mem_read_data0;
reg [31 : 0] mem_read_data1;
reg [31 : 0] mem_read_data2;
reg [31 : 0] mem_read_data3;
reg ready_reg;
wire fw_app_cs;
reg bank0;
reg bank1;
reg bank2;
reg bank3;
//----------------------------------------------------------------
@ -51,6 +55,7 @@ module fw_ram(
//----------------------------------------------------------------
// Block RAM instances.
//----------------------------------------------------------------
// Bank0
SB_RAM40_4K fw_ram0_0(
.RDATA(mem_read_data0[15 : 0]),
.RADDR({3'h0, address[7 : 0]}),
@ -79,7 +84,7 @@ module fw_ram(
.MASK({{8{~we[3]}}, {8{~we[2]}}})
);
// Bank1
SB_RAM40_4K fw_ram1_0(
.RDATA(mem_read_data1[15 : 0]),
.RADDR({3'h0, address[7 : 0]}),
@ -108,6 +113,64 @@ module fw_ram(
.MASK({{8{~we[3]}}, {8{~we[2]}}})
);
// Bank2
SB_RAM40_4K fw_ram2_0(
.RDATA(mem_read_data2[15 : 0]),
.RADDR({3'h0, address[7 : 0]}),
.RCLK(clk),
.RCLKE(1'h1),
.RE(fw_app_cs & bank2),
.WADDR({3'h0, address[7 : 0]}),
.WCLK(clk),
.WCLKE(1'h1),
.WDATA(write_data[15 : 0]),
.WE((|we & fw_app_cs & bank2)),
.MASK({{8{~we[1]}}, {8{~we[0]}}})
);
SB_RAM40_4K fw_ram2_1(
.RDATA(mem_read_data2[31 : 16]),
.RADDR({3'h0, address[7 : 0]}),
.RCLK(clk),
.RCLKE(1'h1),
.RE(fw_app_cs & bank2),
.WADDR({3'h0, address[7 : 0]}),
.WCLK(clk),
.WCLKE(1'h1),
.WDATA(write_data[31 : 16]),
.WE((|we & fw_app_cs & bank2)),
.MASK({{8{~we[3]}}, {8{~we[2]}}})
);
// Bank3
SB_RAM40_4K fw_ram3_0(
.RDATA(mem_read_data3[15 : 0]),
.RADDR({3'h0, address[7 : 0]}),
.RCLK(clk),
.RCLKE(1'h1),
.RE(fw_app_cs & bank3),
.WADDR({3'h0, address[7 : 0]}),
.WCLK(clk),
.WCLKE(1'h1),
.WDATA(write_data[15 : 0]),
.WE((|we & fw_app_cs & bank3)),
.MASK({{8{~we[1]}}, {8{~we[0]}}})
);
SB_RAM40_4K fw_ram3_1(
.RDATA(mem_read_data3[31 : 16]),
.RADDR({3'h0, address[7 : 0]}),
.RCLK(clk),
.RCLKE(1'h1),
.RE(fw_app_cs & bank3),
.WADDR({3'h0, address[7 : 0]}),
.WCLK(clk),
.WCLKE(1'h1),
.WDATA(write_data[31 : 16]),
.WE((|we & fw_app_cs & bank3)),
.MASK({{8{~we[3]}}, {8{~we[2]}}})
);
//----------------------------------------------------------------
// reg_update
//----------------------------------------------------------------
@ -129,17 +192,34 @@ module fw_ram(
begin : rw_mux;
bank0 = 1'h0;
bank1 = 1'h0;
tmp_read_data = 32'h0;
bank2 = 1'h0;
bank3 = 1'h0;
if (fw_app_cs) begin
if (address[8]) begin
bank1 = 1'h1;
tmp_read_data = mem_read_data1;
end
else begin
case(address[9 : 8])
0: begin
bank0 = 1'h1;
tmp_read_data = mem_read_data0;
end
1: begin
bank1 = 1'h1;
tmp_read_data = mem_read_data1;
end
2: begin
bank2 = 1'h1;
tmp_read_data = mem_read_data2;
end
3: begin
bank3 = 1'h1;
tmp_read_data = mem_read_data3;
end
default: begin
end
endcase // case (address[9 : 8])
end
end