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psch9912
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verilog-code-base

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localparam IN_DATA_W = IN_PKT_DATA_H - IN_PKT_DATA_L + 1;
localparam IN_BYTEEN_W = IN_NUMSYMBOLS;
localparam OUT_NUMSYMBOLS = OUT_PKT_BYTEEN_H - OUT_PKT_BYTEEN_L + 1;
localparam OUT_DATA_W = OUT_PKT_DATA_H - OUT_PKT_DATA_L + 1;
localparam OUT_BYTEEN_W = OUT_NUMSYMBOLS;
localparam BURST_TYPE_W = IN_PKT_BURST_TYPE_H - IN_PKT_BURST_TYPE_L + 1;
localparam BURST_SIZE_W = IN_PKT_BURST_SIZE_H - IN_PKT_BURST_SIZE_L + 1;
localparam RESPONSE_STATUS_W = IN_PKT_RESPONSE_STATUS_H - IN_PKT_RESPONSE_STATUS_L + 1;
localparam SYMBOL_W = IN_DATA_W / IN_NUMSYMBOLS;
localparam ADDRESS_W = IN_PKT_ADDR_H - IN_PKT_ADDR_L + 1;
localparam BYTE_CNT_W = IN_PKT_BYTE_CNT_H - IN_PKT_BYTE_CNT_L + 1;
localparam OUT_BYTE_CNT_W = OUT_PKT_BYTE_CNT_H - OUT_PKT_BYTE_CNT_L + 1;
localparam BWRAP_W = IN_PKT_BURSTWRAP_H - IN_PKT_BURSTWRAP_L + 1;
localparam SIZE_W = 2 ** BURST_SIZE_W;
localparam RATIO = (IN_NUMSYMBOLS > OUT_NUMSYMBOLS ?
IN_NUMSYMBOLS / OUT_NUMSYMBOLS :
OUT_NUMSYMBOLS / IN_NUMSYMBOLS );
localparam WIDE_NUMSYMBOLS = (IN_NUMSYMBOLS > OUT_NUMSYMBOLS ?
IN_NUMSYMBOLS : OUT_NUMSYMBOLS );
localparam WIDE_DATA = (IN_NUMSYMBOLS > OUT_NUMSYMBOLS ?
IN_DATA_W - (OUT_NUMSYMBOLS*SYMBOL_W) :
OUT_DATA_W - (IN_NUMSYMBOLS*SYMBOL_W));
localparam OUT_SEGMENT_W = OUT_NUMSYMBOLS * SYMBOL_W;
localparam NW_BITFORSELECT_R = clogb2(IN_NUMSYMBOLS);
localparam NW_BITFORSELECT_L = clogb2(OUT_NUMSYMBOLS) - 1;
localparam ALIGNED_BITS_L = clogb2(OUT_NUMSYMBOLS) - 1;
localparam WN_ADDR_LSBS = clogb2(RATIO);
localparam WN_ADDR_SELECT = clogb2(IN_NUMSYMBOLS);
localparam LOG_OUT_NUMSYMBOLS = clogb2(OUT_NUMSYMBOLS);
// ------------------------------------------------------------
// Utility Functions
// ------------------------------------------------------------
function integer clogb2;
input [63:0] value;
begin
clogb2 = 0;
while (value>0) begin
value = value >> 1;
clogb2 = clogb2 + 1;
end
clogb2 = clogb2 - 1;
end
endfunction // clogb2
function integer min;
input [31:0] a;
input [31:0] b;
begin
return (a < b) ? a : b;
end
endfunction
function integer max;
input [31:0] a;
input [31:0] b;
begin
return (a > b) ? a : b;
end
endfunction
function reg [clogb2(RATIO)-1:0] mask_to_select_correct_segments_for_size;
input [clogb2(RATIO)-1:0] select_output_segment;
input [9:0] size_ratio;
input int msb_select_bit;
integer i;
mask_to_select_correct_segments_for_size = '1;
for (i=0; i < msb_select_bit; i = i +1'b1 ) begin
if (clogb2(size_ratio) > i)
mask_to_select_correct_segments_for_size[i] = select_output_segment[i];
end
endfunction
function reg [ADDRESS_W-1:0] choose_packed_address_base_on_size;
input [9:0] size_ratio;
input int msb_select_bit;
integer i;
choose_packed_address_base_on_size = '1;
for (i=0; i < msb_select_bit; i = i +1'b1 ) begin
if (clogb2(size_ratio) > i)
choose_packed_address_base_on_size[i + NW_BITFORSELECT_R] = 1'b0;
end
endfunction
function reg[9:0] bytes_in_transfer;
input [BURST_SIZE_W-1:0] axsize;
case (axsize)
4'b0000: bytes_in_transfer = 10'b0000000001;
4'b0001: bytes_in_transfer = 10'b0000000010;
4'b0010: bytes_in_transfer = 10'b0000000100;
4'b0011: bytes_in_transfer = 10'b0000001000;
4'b0100: bytes_in_transfer = 10'b0000010000;