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psch9912
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verilog-code-base

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reg startofpacket_reg;
reg endofpacket_reg;
reg [OUT_SEGMENT_W-1:0] mask;
reg [RESPONSE_STATUS_W-1:0] response_status_reg;
reg [ADDRESS_W-1:0] int_output_sel;
reg [clogb2(RATIO)-1:0] output_sel;
reg [OUT_SEGMENT_W-1:0] data_array [0:RATIO-1];
reg [OUT_NUMSYMBOLS-1:0] byteen_array [0:RATIO-1];
// In narrow-to-wide adaptation, each input datum/byteenable bit maps to
// one of OUT_NUMSYMBOLS/IN_NUMSYMBOLS subfields in the wider output
// packet. (Call these subfields "segments".) A subfield of the input
// address, in_bitforselect, selects the segment. Examples:
// 8-16 adaptation: in_bitforselect = in_address_field[0]
// 8-32 adaptation: in_bitforselect = in_address_field[1:0]
// 8-64 adaptation: in_bitforselect = in_address_field[2:0]
// 16-32 adaptation: in_bitforselect = in_address_field[1]
// 32-64 adaptation: in_bitforselect = in_address_field[2]
// The width of in_bitforselect is
// log2(OUT_NUM_SYMBOLS) - log2(IN_NUM_SYMBOLS) =
// log2(RATIO)
// The msb of in_bitforselect is driven by
// in_adress_field[log2(OUT_NUMSYMBOLS) - 1]
// The lsb of in_adress_field is driven by
// in_adress_field[log2(IN_NUMSYMBOLS)]
reg [clogb2(RATIO)-1:0] in_bitforselect;
integer i, j;
// ----------------------------------------
// Input Field Mapping
// ----------------------------------------
reg [ADDRESS_W-1:0] address_for_adaptation;
always @* begin
in_size_field = in_data[IN_PKT_BURST_SIZE_H :IN_PKT_BURST_SIZE_L ];
in_data_field = in_data[IN_PKT_DATA_H :IN_PKT_DATA_L ];
in_byteen_field = in_data[IN_PKT_BYTEEN_H :IN_PKT_BYTEEN_L ];
address_from_packet = in_data[IN_PKT_ADDR_H :IN_PKT_ADDR_L ];
//in_address_field = in_data[IN_PKT_ADDR_H :IN_PKT_ADDR_L ];
in_byte_cnt_field = in_data[IN_PKT_BYTE_CNT_H :IN_PKT_BYTE_CNT_L ];
in_cmpr_read = in_data[IN_PKT_TRANS_COMPRESSED_READ];
in_lock_field = in_data[IN_PKT_TRANS_EXCLUSIVE];
in_burst_type_field = in_data[IN_PKT_BURST_TYPE_H :IN_PKT_BURST_TYPE_L ];
in_response_status_field = in_data[IN_PKT_RESPONSE_STATUS_H :IN_PKT_RESPONSE_STATUS_L];
end
// ----------------------------------------
// Process unaligned address for first address of the burst
// ----------------------------------------
generate
if (IN_NUMSYMBOLS > OUT_NUMSYMBOLS && ENABLE_ADDRESS_ALIGNMENT) begin
reg [ADDRESS_W + (BWRAP_W-1) + BURST_SIZE_W + BURST_TYPE_W - 1 :0] address_for_alignment;
reg [ADDRESS_W + clogb2(IN_NUMSYMBOLS)-1:0] address_after_aligned;
assign address_for_alignment = {address_from_packet, in_size_field};
assign address_for_adaptation = address_after_aligned[ADDRESS_W-1:0];
altera_merlin_address_alignment
#(
.ADDR_W (ADDRESS_W),
.BURSTWRAP_W (BWRAP_W),
.INCREMENT_ADDRESS (0),
.NUMSYMBOLS (IN_NUMSYMBOLS),
.SIZE_W (BURST_SIZE_W)
) check_and_align_address_to_size
(
.clk(clk),
.reset(reset),
.in_data(address_for_alignment),
.out_data(address_after_aligned),
.in_valid(),
.in_sop(),
.in_eop(),
.out_ready()
);
end else begin
assign address_for_adaptation = address_from_packet;
end
endgenerate
generate begin
if (FIRST_EXISTS) begin
always @* begin
in_first_field = in_data[IN_FIRST_H:IN_FIRST_L];
end
end else begin
always @* begin
in_first_field = '0;
end
end
if (MID_EXISTS) begin
always @* begin
in_mid_field = in_data[IN_MID_H:IN_MID_L];
end
end else begin
always @* begin
in_mid_field = '0;