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128 lines
4.3 KiB
Verilog
128 lines
4.3 KiB
Verilog
/*******************************************************************************
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* Function: Packet-->Memory Mapped Transaction Converter
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* Author: Andreas Olofsson
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* License: MIT (see LICENSE file in OH! repository)
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*
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* Documentation:
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*
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* see ./emesh2packet.v
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*
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******************************************************************************/
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module packet2emesh
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#(parameter AW = 32, // address width
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parameter PW = 104) // packet width
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(
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//Input packet
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input [PW-1:0] packet_in,
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//Emesh signal bundle
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output [15:0] cmd_in, // command
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output write_in,// indicates a write transaction
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output [AW-1:0] dstaddr_in, // read/write target address
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output [AW-1:0] srcaddr_in, // read return address
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output [2*AW-1:0] data_in // write data
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);
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generate
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//######################
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// 16-Bit ("lite/apb like")
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//######################
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if(AW==16) begin : aw16
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if(PW==40) begin : p40
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assign cmd_in[7:0] = packet_in[7:0];
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assign cmd_in[15:8] = 8'b0;
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assign dstaddr_in[15:0] = packet_in[23:8];
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assign srcaddr_in[15:0] = packet_in[39:24];
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assign data_in[31:0] = {16'b0,packet_in[39:24]};
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end
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else begin: perror
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initial
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$display ("Combo not supported (PW=%ds AW==%ds)", PW,AW);
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end
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end // block: aw16
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//######################
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// 32-Bit
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//######################
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if(AW==32) begin : aw32
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if(PW==80) begin: p80
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assign cmd_in[15:0] = packet_in[15:0];
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assign dstaddr_in[31:0] = packet_in[47:16];
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assign srcaddr_in[31:0] = packet_in[79:48];
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assign data_in[31:0] = packet_in[79:48];
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assign data_in[63:32] = 32'b0;
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end
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else if(PW==112) begin: p112
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assign cmd_in[15:0] = packet_in[15:0];
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assign dstaddr_in[31:0] = packet_in[47:16];
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assign srcaddr_in[31:0] = packet_in[79:48];
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assign data_in[63:0] = packet_in[111:48];
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end
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else begin: perror
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initial
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$display ("Combo not supported (PW=%ds AW==%ds)", PW,AW);
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end
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end // block: aw32
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//######################
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// 64-Bit
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//######################
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if(AW==64) begin : aw64
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if(PW==144) begin: p144
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assign cmd_in[15:0] = packet_in[15:0];
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assign dstaddr_in[31:0] = packet_in[47:16];
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assign srcaddr_in[63:0] = packet_in[111:48];
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assign data_in[127:0] = packet_in[111:48];
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assign dstaddr_in[63:32] = packet_in[143:112];
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assign data_in[127:64] = 64'b0;
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end
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else if(PW==208) begin: p208
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assign cmd_in[15:0] = packet_in[15:0];
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assign dstaddr_in[31:0] = packet_in[47:16];
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assign srcaddr_in[63:0] = packet_in[111:48];
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assign data_in[63:0] = packet_in[111:48];
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assign dstaddr_in[63:32] = packet_in[143:112];
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assign data_in[127:64] = packet_in[207:144];
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end
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else begin: perror
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initial
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$display ("Combo not supported (PW=%ds AW==%ds)", PW,AW);
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end
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end // block: aw64
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//######################
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// 128-Bit
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//######################
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if(AW==128) begin : aw128
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if(PW==272) begin: p272
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assign cmd_in[15:0] = packet_in[15:0];
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assign dstaddr_in[31:0] = packet_in[47:16];
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assign srcaddr_in[63:0] = packet_in[111:48];
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assign data_in[63:0] = packet_in[111:48];
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assign dstaddr_in[63:32] = packet_in[143:112];
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assign data_in[127:64] = packet_in[207:144];
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assign srcaddr_in[127:64] = packet_in[207:144];
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assign dstaddr_in[127:64] = packet_in[271:208];
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assign data_in[255:128] = 128'b0;
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end
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else if(PW==400) begin: p400
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assign cmd_in[15:0] = packet_in[15:0];
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assign dstaddr_in[31:0] = packet_in[47:16];
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assign srcaddr_in[63:0] = packet_in[111:48];
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assign data_in[63:0] = packet_in[111:48];
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assign dstaddr_in[63:32] = packet_in[143:112];
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assign data_in[127:64] = packet_in[207:144];
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assign srcaddr_in[127:64] = packet_in[207:144];
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assign dstaddr_in[127:64] = packet_in[271:208];
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assign data_in[255:128] = packet_in[399:272];
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end
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else begin: perror
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initial
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$display ("Combo not supported (PW=%ds AW==%ds)", PW,AW);
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end
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end // block: aw128
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endgenerate
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assign write_in = cmd_in[3];
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endmodule // packet2emesh
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