262 lines
12 KiB
Systemverilog
262 lines
12 KiB
Systemverilog
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// (C) 2001-2015 Altera Corporation. All rights reserved.
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// Your use of Altera Corporation's design tools, logic functions and other
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// software and tools, and its AMPP partner logic functions, and any output
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// files any of the foregoing (including device programming or simulation
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// files), and any associated documentation or information are expressly subject
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// to the terms and conditions of the Altera Program License Subscription
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// Agreement, Altera MegaCore Function License Agreement, or other applicable
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// license agreement, including, without limitation, that your use is for the
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// sole purpose of programming logic devices manufactured by Altera and sold by
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// Altera or its authorized distributors. Please refer to the applicable
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// agreement for further details.
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`timescale 1 ns / 1 ns
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// -----------------------------------------------------
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// Top level for the burst adapter. This selects the
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// implementation for the adapter, based on the
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// parameterization.
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// -----------------------------------------------------
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module altera_merlin_burst_adapter
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#(
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parameter
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// Indicates the implementation to instantiate:
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// "13.1" means the slow, inexpensive generic burst converter.
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// "new" means the fast, expensive per-burst converter.
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ADAPTER_VERSION = "13.1",
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// Indicates if this adapter needs to support read bursts
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// (almost always true).
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COMPRESSED_READ_SUPPORT = 1,
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// Standard Merlin packet parameters that indicate
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// field position within the packet
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PKT_BEGIN_BURST = 81,
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PKT_ADDR_H = 79,
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PKT_ADDR_L = 48,
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PKT_BYTE_CNT_H = 5,
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PKT_BYTE_CNT_L = 0,
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PKT_BURSTWRAP_H = 11,
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PKT_BURSTWRAP_L = 6,
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PKT_TRANS_COMPRESSED_READ = 14,
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PKT_TRANS_WRITE = 13,
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PKT_TRANS_READ = 12,
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PKT_BYTEEN_H = 83,
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PKT_BYTEEN_L = 80,
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PKT_BURST_TYPE_H = 88,
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PKT_BURST_TYPE_L = 87,
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PKT_BURST_SIZE_H = 86,
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PKT_BURST_SIZE_L = 84,
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ST_DATA_W = 89,
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ST_CHANNEL_W = 8,
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// Component-specific parameters. Explained
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// in the implementation levels
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IN_NARROW_SIZE = 0,
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NO_WRAP_SUPPORT = 0,
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INCOMPLETE_WRAP_SUPPORT = 1,
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BURSTWRAP_CONST_MASK = 0,
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BURSTWRAP_CONST_VALUE = -1,
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OUT_NARROW_SIZE = 0,
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OUT_FIXED = 0,
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OUT_COMPLETE_WRAP = 0,
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BYTEENABLE_SYNTHESIS = 0,
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PIPE_INPUTS = 0,
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OUT_BYTE_CNT_H = 5,
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OUT_BURSTWRAP_H = 11
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)
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(
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input clk,
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input reset,
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// -------------------
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// Command Sink (Input)
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// -------------------
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input sink0_valid,
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input [ST_DATA_W-1 : 0] sink0_data,
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input [ST_CHANNEL_W-1 : 0] sink0_channel,
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input sink0_startofpacket,
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input sink0_endofpacket,
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output reg sink0_ready,
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// -------------------
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// Command Source (Output)
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// -------------------
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output wire source0_valid,
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output wire [ST_DATA_W-1 : 0] source0_data,
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output wire [ST_CHANNEL_W-1 : 0] source0_channel,
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output wire source0_startofpacket,
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output wire source0_endofpacket,
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input source0_ready
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);
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localparam PKT_BURSTWRAP_W = PKT_BURSTWRAP_H - PKT_BURSTWRAP_L + 1;
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generate if (COMPRESSED_READ_SUPPORT == 0) begin : altera_merlin_burst_adapter_uncompressed_only
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// -------------------------------------------------------------------
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// The reduced version of the adapter is only meant to be used on
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// non-bursting wide to narrow links.
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// -------------------------------------------------------------------
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altera_merlin_burst_adapter_uncompressed_only #(
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.PKT_BYTE_CNT_H (PKT_BYTE_CNT_H),
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.PKT_BYTE_CNT_L (PKT_BYTE_CNT_L),
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.PKT_BYTEEN_H (PKT_BYTEEN_H),
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.PKT_BYTEEN_L (PKT_BYTEEN_L),
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.ST_DATA_W (ST_DATA_W),
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.ST_CHANNEL_W (ST_CHANNEL_W)
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) burst_adapter (
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.clk (clk),
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.reset (reset),
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.sink0_valid (sink0_valid),
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.sink0_data (sink0_data),
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.sink0_channel (sink0_channel),
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.sink0_startofpacket (sink0_startofpacket),
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.sink0_endofpacket (sink0_endofpacket),
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.sink0_ready (sink0_ready),
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.source0_valid (source0_valid),
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.source0_data (source0_data),
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.source0_channel (source0_channel),
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.source0_startofpacket (source0_startofpacket),
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.source0_endofpacket (source0_endofpacket),
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.source0_ready (source0_ready)
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);
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end
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else if (ADAPTER_VERSION == "13.1") begin : altera_merlin_burst_adapter_13_1
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// -----------------------------------------------------
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// This is the generic converter implementation, which attempts
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// to convert all burst types with a generalized conversion
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// function. This results in low area, but low fmax.
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// -----------------------------------------------------
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altera_merlin_burst_adapter_13_1 #(
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.PKT_BEGIN_BURST (PKT_BEGIN_BURST),
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.PKT_ADDR_H (PKT_ADDR_H ),
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.PKT_ADDR_L (PKT_ADDR_L),
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.PKT_BYTE_CNT_H (PKT_BYTE_CNT_H),
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.PKT_BYTE_CNT_L (PKT_BYTE_CNT_L ),
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.PKT_BURSTWRAP_H (PKT_BURSTWRAP_H),
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.PKT_BURSTWRAP_L (PKT_BURSTWRAP_L),
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.PKT_TRANS_COMPRESSED_READ (PKT_TRANS_COMPRESSED_READ),
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.PKT_TRANS_WRITE (PKT_TRANS_WRITE),
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.PKT_TRANS_READ (PKT_TRANS_READ),
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.PKT_BYTEEN_H (PKT_BYTEEN_H),
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.PKT_BYTEEN_L (PKT_BYTEEN_L),
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.PKT_BURST_TYPE_H (PKT_BURST_TYPE_H),
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.PKT_BURST_TYPE_L (PKT_BURST_TYPE_L),
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.PKT_BURST_SIZE_H (PKT_BURST_SIZE_H),
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.PKT_BURST_SIZE_L (PKT_BURST_SIZE_L),
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.IN_NARROW_SIZE (IN_NARROW_SIZE),
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.BYTEENABLE_SYNTHESIS (BYTEENABLE_SYNTHESIS),
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.OUT_NARROW_SIZE (OUT_NARROW_SIZE),
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.OUT_FIXED (OUT_FIXED),
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.OUT_COMPLETE_WRAP (OUT_COMPLETE_WRAP),
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.ST_DATA_W (ST_DATA_W),
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.ST_CHANNEL_W (ST_CHANNEL_W),
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.BURSTWRAP_CONST_MASK (BURSTWRAP_CONST_MASK),
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.BURSTWRAP_CONST_VALUE (BURSTWRAP_CONST_VALUE),
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.PIPE_INPUTS (PIPE_INPUTS),
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.NO_WRAP_SUPPORT (NO_WRAP_SUPPORT),
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.OUT_BYTE_CNT_H (OUT_BYTE_CNT_H),
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.OUT_BURSTWRAP_H (OUT_BURSTWRAP_H)
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) burst_adapter (
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.clk (clk),
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.reset (reset),
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.sink0_valid (sink0_valid),
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.sink0_data (sink0_data),
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.sink0_channel (sink0_channel),
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.sink0_startofpacket (sink0_startofpacket),
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.sink0_endofpacket (sink0_endofpacket),
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.sink0_ready (sink0_ready),
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.source0_valid (source0_valid),
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.source0_data (source0_data),
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.source0_channel (source0_channel),
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.source0_startofpacket (source0_startofpacket),
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.source0_endofpacket (source0_endofpacket),
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.source0_ready (source0_ready)
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);
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end
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else begin : altera_merlin_burst_adapter_new
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// -----------------------------------------------------
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// This is the per-burst-type converter implementation. This attempts
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// to convert bursts with specialized functions for each burst
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// type. This typically results in higher area, but higher fmax.
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// -----------------------------------------------------
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altera_merlin_burst_adapter_new #(
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.PKT_BEGIN_BURST (PKT_BEGIN_BURST),
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.PKT_ADDR_H (PKT_ADDR_H ),
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.PKT_ADDR_L (PKT_ADDR_L),
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.PKT_BYTE_CNT_H (PKT_BYTE_CNT_H),
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.PKT_BYTE_CNT_L (PKT_BYTE_CNT_L ),
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.PKT_BURSTWRAP_H (PKT_BURSTWRAP_H),
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.PKT_BURSTWRAP_L (PKT_BURSTWRAP_L),
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.PKT_TRANS_COMPRESSED_READ (PKT_TRANS_COMPRESSED_READ),
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.PKT_TRANS_WRITE (PKT_TRANS_WRITE),
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.PKT_TRANS_READ (PKT_TRANS_READ),
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.PKT_BYTEEN_H (PKT_BYTEEN_H),
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.PKT_BYTEEN_L (PKT_BYTEEN_L),
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.PKT_BURST_TYPE_H (PKT_BURST_TYPE_H),
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.PKT_BURST_TYPE_L (PKT_BURST_TYPE_L),
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.PKT_BURST_SIZE_H (PKT_BURST_SIZE_H),
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.PKT_BURST_SIZE_L (PKT_BURST_SIZE_L),
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.IN_NARROW_SIZE (IN_NARROW_SIZE),
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.BYTEENABLE_SYNTHESIS (BYTEENABLE_SYNTHESIS),
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.OUT_NARROW_SIZE (OUT_NARROW_SIZE),
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.OUT_FIXED (OUT_FIXED),
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.OUT_COMPLETE_WRAP (OUT_COMPLETE_WRAP),
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.ST_DATA_W (ST_DATA_W),
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.ST_CHANNEL_W (ST_CHANNEL_W),
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.BURSTWRAP_CONST_MASK (BURSTWRAP_CONST_MASK),
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.BURSTWRAP_CONST_VALUE (BURSTWRAP_CONST_VALUE),
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.PIPE_INPUTS (PIPE_INPUTS),
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.NO_WRAP_SUPPORT (NO_WRAP_SUPPORT),
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.INCOMPLETE_WRAP_SUPPORT (INCOMPLETE_WRAP_SUPPORT),
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.OUT_BYTE_CNT_H (OUT_BYTE_CNT_H),
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.OUT_BURSTWRAP_H (OUT_BURSTWRAP_H)
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) burst_adapter (
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.clk (clk),
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.reset (reset),
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.sink0_valid (sink0_valid),
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.sink0_data (sink0_data),
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.sink0_channel (sink0_channel),
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.sink0_startofpacket (sink0_startofpacket),
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.sink0_endofpacket (sink0_endofpacket),
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.sink0_ready (sink0_ready),
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.source0_valid (source0_valid),
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.source0_data (source0_data),
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.source0_channel (source0_channel),
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.source0_startofpacket (source0_startofpacket),
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.source0_endofpacket (source0_endofpacket),
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.source0_ready (source0_ready)
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);
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end
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endgenerate
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// synthesis translate_off
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// -----------------------------------------------------
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// Simulation-only check for incoming burstwrap values inconsistent with
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// BURSTWRAP_CONST_MASK, which would indicate a paramerization error.
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//
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// Should be turned into an assertion, really.
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// -----------------------------------------------------
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always @(posedge clk or posedge reset) begin
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if (~reset && sink0_valid &&
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BURSTWRAP_CONST_MASK[PKT_BURSTWRAP_W - 1:0] &
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(BURSTWRAP_CONST_VALUE[PKT_BURSTWRAP_W - 1:0] ^ sink0_data[PKT_BURSTWRAP_H : PKT_BURSTWRAP_L])
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) begin
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$display("%t: %m: Error: burstwrap value %X is inconsistent with BURSTWRAP_CONST_MASK value %X", $time(), sink0_data[PKT_BURSTWRAP_H : PKT_BURSTWRAP_L], BURSTWRAP_CONST_MASK[PKT_BURSTWRAP_W - 1:0]);
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end
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end
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// synthesis translate_on
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endmodule
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