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[/] [axi_master/] [trunk/] [src/] [base/] [axi_master_single.v] - Rev 12
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///////////////////////////////////////////////////////////////////// //// //// //// Author: Eyal Hochberg //// //// eyal@provartec.com //// //// //// //// Downloaded from: http://www.opencores.org //// ///////////////////////////////////////////////////////////////////// //// //// //// Copyright (C) 2010 Provartec LTD //// //// www.provartec.com //// //// info@provartec.com //// //// //// //// This source file may be used and distributed without //// //// restriction provided that this copyright statement is not //// //// removed from the file and that any derivative work contains //// //// the original copyright notice and the associated disclaimer.//// //// //// //// This source file is free software; you can redistribute it //// //// and/or modify it under the terms of the GNU Lesser General //// //// Public License as published by the Free Software Foundation.//// //// //// //// This source is distributed in the hope that it will be //// //// useful, but WITHOUT ANY WARRANTY; without even the implied //// //// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR //// //// PURPOSE. See the GNU Lesser General Public License for more//// //// details. http://www.gnu.org/licenses/lgpl.html //// //// //// ///////////////////////////////////////////////////////////////////// OUTFILE PREFIX_single.v INCLUDE def_axi_master.txt module PREFIX_single(PORTS); parameter MASTER_NUM = 0; parameter MASTER_ID = 0; parameter MASTER_PEND = 0; CREATE prgen_rand.v DEFCMD(DEFINE NOT_IN_LIST) `include "prgen_rand.v" parameter MAX_CMDS = 16; //Depth of command FIFO parameter DATA_LOG = LOG2(EXPR(DATA_BITS/8)); parameter PEND_BITS = (MAX_CMDS <= 16) ? 4 : (MAX_CMDS <= 32) ? 5 : (MAX_CMDS <= 64) ? 6 : (MAX_CMDS <= 128) ? 7 : (MAX_CMDS <= 256) ? 8 : (MAX_CMDS <= 512) ? 9 : 0; //0 is ilegal input clk; input reset; port GROUP_STUB_AXI; output idle; output scrbrd_empty; //random parameters integer GROUP_AXI_MASTER_RAND = GROUP_AXI_MASTER_RAND.DEFAULT; reg AWVALID_pre; reg WVALID_pre; wire BREADY_pre; reg ARVALID_pre; wire RREADY_pre; reg enable = 0; reg rd_enable = 0; reg wr_enable = 0; reg wait_for_write = 0; reg scrbrd_enable = 0; reg [LEN_BITS-1:0] wvalid_cnt; reg rd_cmd_push = 0; wire rd_cmd_pop; wire [PEND_BITS:0] rd_cmd_fullness; wire rd_cmd_empty; wire rd_cmd_full; reg [ADDR_BITS-1:0] rd_cmd_addr_in; reg [LEN_BITS-1:0] rd_cmd_len_in; reg [SIZE_BITS-1:0] rd_cmd_size_in; wire [ADDR_BITS-1:0] rd_cmd_addr; wire [LEN_BITS-1:0] rd_cmd_len; wire [SIZE_BITS-1:0] rd_cmd_size; reg rd_resp_push = 0; wire rd_resp_pop; wire rd_resp_empty; wire rd_resp_full; reg [ADDR_BITS-1:0] rd_resp_addr_in; reg [SIZE_BITS-1:0] rd_resp_size_in; wire [ADDR_BITS-1:0] rd_resp_addr; wire [SIZE_BITS-1:0] rd_resp_size; reg wr_cmd_push = 0; wire wr_cmd_pop; wire [PEND_BITS:0] wr_cmd_fullness; wire wr_cmd_empty; wire wr_cmd_full; reg [ADDR_BITS-1:0] wr_cmd_addr_in; reg [LEN_BITS-1:0] wr_cmd_len_in; reg [SIZE_BITS-1:0] wr_cmd_size_in; wire [ADDR_BITS-1:0] wr_cmd_addr; wire [LEN_BITS-1:0] wr_cmd_len; wire [SIZE_BITS-1:0] wr_cmd_size; reg wr_data_push = 0; wire wr_data_pop; wire [PEND_BITS:0] wr_data_fullness; wire wr_data_empty; wire wr_data_full; reg [ADDR_BITS-1:0] wr_data_addr_in; reg [LEN_BITS-1:0] wr_data_len_in; reg [SIZE_BITS-1:0] wr_data_size_in; wire [ADDR_BITS-1:0] wr_data_addr; wire [LEN_BITS-1:0] wr_data_len; wire [SIZE_BITS-1:0] wr_data_size; wire [DATA_BITS/8-1:0] wr_data_strb; wire [7:0] wr_data_bytes; wire [ADDR_BITS-1:0] wr_data_addr_prog; wire [7:0] wr_data_offset; wire wr_resp_push; reg wr_resp_pop = 0; wire wr_resp_empty; wire wr_resp_full; wire [1:0] wr_resp_resp_in; wire [1:0] wr_resp_resp; reg wr_fifo_push = 0; wire wr_fifo_pop; wire wr_fifo_empty; wire wr_fifo_full; reg [DATA_BITS-1:0] wr_fifo_data_in; wire [DATA_BITS-1:0] wr_fifo_data; wire rd_fifo_push; reg rd_fifo_pop = 0; wire rd_fifo_empty; wire rd_fifo_full; wire [DATA_BITS-1:0] rd_fifo_data_in; wire [1:0] rd_fifo_resp_in; wire [DATA_BITS-1:0] rd_fifo_data; wire [1:0] rd_fifo_resp; reg scrbrd_push = 0; reg scrbrd_pop = 0; wire scrbrd_empty; wire scrbrd_full; reg [ADDR_BITS-1:0] scrbrd_addr_in; reg [DATA_BITS-1:0] scrbrd_data_in; reg [DATA_BITS-1:0] scrbrd_mask_in; wire [ADDR_BITS-1:0] scrbrd_addr; wire [DATA_BITS-1:0] scrbrd_data; wire [DATA_BITS-1:0] scrbrd_mask; integer wr_fullness; integer rd_fullness; integer rd_completed; integer wr_completed; integer wr_pend_max = MASTER_PEND; integer rd_pend_max = MASTER_PEND; wire wr_hold; wire rd_hold; integer rand_chk_num = 0; assign idle = rd_cmd_empty & rd_resp_empty & wr_cmd_empty & wr_data_empty & wr_resp_empty; always @(rand_chk_num) if (rand_chk_num > 0) insert_rand_chk_loop(rand_chk_num); always @(posedge enable) begin @(posedge clk); wr_enable = 1; repeat (50) @(posedge clk); rd_enable = 1; end //for incremental data reg [DATA_BITS-1:0] base_data = 0; integer ww; initial begin ww=0; while (ww < DATA_BITS/8) begin base_data = base_data + ((MASTER_NUM + ww) << (ww*8)); ww = ww + 1; end end assign rd_cmd_pop = ARVALID & ARREADY; assign rd_resp_pop = RVALID & RREADY & RLAST; assign rd_fifo_push = RVALID & RREADY; assign wr_cmd_pop = AWVALID & AWREADY; assign wr_data_pop = WVALID & WREADY & WLAST; assign wr_fifo_pop = WVALID & WREADY; assign wr_resp_push = BVALID & BREADY; assign RREADY_pre = 1; assign BREADY_pre = 1; always @(posedge clk or posedge reset) if (reset) AWVALID_pre <= #FFD 1'b0; else if ((wr_cmd_fullness == 1) & wr_cmd_pop) AWVALID_pre <= #FFD 1'b0; else if ((!wr_cmd_empty) & wr_enable) AWVALID_pre <= #FFD 1'b1; assign AWADDR = wr_cmd_addr; assign AWLEN = wr_cmd_len; assign AWSIZE = wr_cmd_size; assign AWID = MASTER_ID; assign AWBURST = 2'd1; //INCR only assign AWCACHE = 4'd0; //not supported assign AWPROT = 4'd0; //not supported assign AWLOCK = 2'd0; //not supported always @(posedge clk or posedge reset) if (reset) ARVALID_pre <= #FFD 1'b0; else if (((rd_cmd_fullness == 1)) & rd_cmd_pop) ARVALID_pre <= #FFD 1'b0; else if ((!rd_cmd_empty) & rd_enable) ARVALID_pre <= #FFD 1'b1; assign ARADDR = rd_cmd_addr; assign ARLEN = rd_cmd_len; assign ARSIZE = rd_cmd_size; assign ARID = MASTER_ID; assign ARBURST = 2'd1; //INCR only assign ARCACHE = 4'd0; //not supported assign ARPROT = 4'd0; //not supported assign ARLOCK = 2'd0; //not supported assign rd_fifo_data_in = RDATA; assign rd_fifo_resp_in = BRESP; assign wr_data_bytes = 1'b1 << wr_data_size; assign wr_data_strb = wr_data_size == 'd0 ? 1'b1 : wr_data_size == 'd1 ? 2'b11 : wr_data_size == 'd2 ? 4'b1111 : wr_data_size == 'd3 ? {8{1'b1}} : wr_data_size == 'd4 ? {16{1'b1}} : 'd0; assign wr_data_addr_prog = wr_data_addr + (wvalid_cnt * wr_data_bytes); always @(posedge clk or posedge reset) if (reset) WVALID_pre <= #FFD 1'b0; else if ((wr_data_fullness == 1) & wr_data_pop) WVALID_pre <= #FFD 1'b0; else if ((!wr_data_empty) & wr_enable) WVALID_pre <= #FFD 1'b1; assign wr_data_offset = wr_data_addr_prog[DATA_LOG-1:0]; assign WID = MASTER_ID; assign WDATA = wr_fifo_empty ? 0 : wr_fifo_data; assign WSTRB = wr_data_strb << wr_data_offset; always @(posedge clk or posedge reset) if (reset) wvalid_cnt <= #FFD {LEN_BITS{1'b0}}; else if (wr_data_pop) wvalid_cnt <= #FFD {LEN_BITS{1'b0}}; else if (WVALID & WREADY) wvalid_cnt <= #FFD wvalid_cnt + 1'b1; assign WLAST = WVALID & (wvalid_cnt == wr_data_len); assign wr_resp_resp_in = BRESP; always @(posedge clk or posedge reset) if (reset) begin wr_fullness <= #FFD 0; rd_fullness <= #FFD 0; rd_completed <= #FFD 0; wr_completed <= #FFD 0; end else begin wr_fullness <= #FFD wr_fullness + wr_cmd_pop - wr_resp_push; rd_fullness <= #FFD rd_fullness + rd_cmd_pop - rd_resp_pop; rd_completed <= #FFD rd_completed + rd_resp_pop; wr_completed <= #FFD wr_completed + wr_resp_push; end assign wr_hold = wr_fullness >= wr_pend_max; assign rd_hold = (rd_fullness >= rd_pend_max) | (wait_for_write & (wr_completed <= rd_completed + rd_fullness)); task insert_rd_cmd; input [ADDR_BITS-1:0] addr; input [LEN_BITS-1:0] len; input [SIZE_BITS-1:0] size; begin rd_cmd_addr_in = addr; rd_cmd_len_in = len; rd_cmd_size_in = size; rd_resp_addr_in = addr; rd_resp_size_in = size; if (rd_cmd_full) enable = 1; //start stub not started yet #FFD; wait ((!rd_cmd_full) & (!rd_resp_full)); @(negedge clk); #FFD; rd_cmd_push = 1; rd_resp_push = 1; @(posedge clk); #FFD; rd_cmd_push = 0; rd_resp_push = 0; end endtask task insert_wr_cmd; input [ADDR_BITS-1:0] addr; input [LEN_BITS-1:0] len; input [SIZE_BITS-1:0] size; begin wr_cmd_addr_in = addr; wr_cmd_len_in = len; wr_cmd_size_in = size; wr_data_addr_in = addr; wr_data_len_in = len; wr_data_size_in = size; if (wr_cmd_full) enable = 1; //start stub not started yet #FFD; wait ((!wr_cmd_full) & (!wr_data_full)); @(negedge clk); #FFD; wr_cmd_push = 1; wr_data_push = 1; @(posedge clk); #FFD; wr_cmd_push = 0; wr_data_push = 0; end endtask task insert_wr_data; input [DATA_BITS-1:0] wdata; begin wr_fifo_data_in = wdata; #FFD; wait (!wr_fifo_full); @(negedge clk); #FFD; wr_fifo_push = 1; @(posedge clk); #FFD; wr_fifo_push = 0; end endtask task insert_wr_incr_data; input [ADDR_BITS-1:0] addr; input [LEN_BITS-1:0] len; input [SIZE_BITS-1:0] size; integer valid_cnt; integer wdata_cnt; reg [7:0] data_cnt; integer bytes; reg [DATA_BITS-1:0] add_data; reg [DATA_BITS-1:0] next_data; begin //insert data valid_cnt = 0; while (valid_cnt <= len) begin bytes = 1'b1 << size; wdata_cnt = valid_cnt+(addr[DATA_LOG-1:0]/bytes); data_cnt = ((wdata_cnt)/(DATA_BITS/(bytes*8))) * (DATA_BITS/8); add_data = {DATA_BITS/8{data_cnt}}; next_data = (use_addr_base ? addr : base_data) + add_data; insert_wr_data(next_data); valid_cnt = valid_cnt+1; end //insert command insert_wr_cmd(addr, len, size); end endtask task insert_scrbrd; input [ADDR_BITS-1:0] addr; input [DATA_BITS-1:0] data; input [DATA_BITS-1:0] mask; begin scrbrd_enable = 1; scrbrd_addr_in = addr; scrbrd_data_in = data; scrbrd_mask_in = mask; #FFD; wait (!scrbrd_full); @(negedge clk); #FFD; scrbrd_push = 1; @(posedge clk); #FFD; scrbrd_push = 0; end endtask task insert_scrbrd_incr_data; input [ADDR_BITS-1:0] addr; input [LEN_BITS-1:0] len; input [SIZE_BITS-1:0] size; integer valid_cnt; integer wdata_cnt; reg [7:0] data_cnt; integer bytes; reg [DATA_BITS-1:0] add_data; reg [DATA_BITS-1:0] next_data; reg [DATA_BITS:0] strb; reg [DATA_BITS-1:0] mask; reg [ADDR_BITS-1:0] next_addr; begin valid_cnt = 0; while (valid_cnt <= len) begin bytes = 1'b1 << size; wdata_cnt = valid_cnt+(addr[DATA_LOG-1:0]/bytes); data_cnt = ((wdata_cnt)/(DATA_BITS/(bytes*8))) * (DATA_BITS/8); add_data = {DATA_BITS/8{data_cnt}}; next_data = (use_addr_base ? addr : base_data) + add_data; next_addr = addr + (bytes * valid_cnt); strb = (1 << (bytes*8)) - 1; mask = strb << (next_addr[DATA_LOG-1:0]*8); insert_scrbrd(next_addr, next_data, mask); valid_cnt = valid_cnt+1; end end endtask task insert_rd_scrbrd; input [ADDR_BITS-1:0] addr; input [LEN_BITS-1:0] len; input [SIZE_BITS-1:0] size; begin insert_scrbrd_incr_data(addr, len, size); insert_rd_cmd(addr, len, size); end endtask task insert_wr_rd_scrbrd; input [ADDR_BITS-1:0] addr; input [LEN_BITS-1:0] len; input [SIZE_BITS-1:0] size; begin wait_for_write=1; insert_wr_incr_data(addr, len, size); insert_rd_scrbrd(addr, len, size); end endtask task insert_wr_rd_scrbrd_rand; reg [ADDR_BITS-1:0] addr; reg [LEN_BITS-1:0] len; reg [SIZE_BITS-1:0] size; begin if (DATA_BITS==32) size_max = 2'b10; len = rand(len_min, len_max); size = rand(size_min, size_max); addr = rand_align(addr_min, addr_max, 1 << size); if (ahb_bursts) begin len = len[3] ? 15 : len[2] ? 7 : len[1] ? 3 : 0; if (len > 0) size = (DATA_BITS == 64) ? 2'b11 : 2'b10; //AHB bursts always full data addr = align(addr, EXPR(DATA_BITS/8)*(len+1)); //address aligned to burst size end insert_wr_rd_scrbrd(addr, len, size); end endtask task insert_rand_chk; input [31:0] num; rand_chk_num = num; endtask task insert_rand_chk_loop; input [31:0] num; integer i; begin i = 0; while (i < num) begin insert_wr_rd_scrbrd_rand; i = i + 1; end end endtask task insert_wr_single; input [ADDR_BITS-1:0] addr; input [DATA_BITS-1:0] wdata; reg [SIZE_BITS-1:0] size; begin size = EXPR((DATA_BITS/32)+1); insert_wr_data(wdata); insert_wr_cmd(addr, 0, size); end endtask task get_rd_resp; output [DATA_BITS-1:0] rdata; output [1:0] resp; reg [DATA_BITS-1:0] rdata; reg [1:0] resp; begin #FFD; wait (!rd_fifo_empty); rdata = rd_fifo_data; resp = rd_fifo_resp; @(negedge clk); #FFD; rd_fifo_pop = 1; @(posedge clk); #FFD; rd_fifo_pop = 0; end endtask task get_scrbrd; output [ADDR_BITS-1:0] addr; output [DATA_BITS-1:0] rdata; output [DATA_BITS-1:0] mask; reg [ADDR_BITS-1:0] addr; reg [DATA_BITS-1:0] rdata; reg [DATA_BITS-1:0] mask; begin #FFD; wait (!scrbrd_empty); addr = scrbrd_addr; rdata = scrbrd_data; mask = scrbrd_mask; @(negedge clk); #FFD; scrbrd_pop = 1; @(posedge clk); #FFD; scrbrd_pop = 0; end endtask task get_wr_resp; output [1:0] resp; reg [1:0] resp; begin #FFD; wait (!wr_resp_empty); resp = wr_resp_resp; @(negedge clk); #FFD; wr_resp_pop = 1; @(posedge clk); #FFD; wr_resp_pop = 0; end endtask task insert_rd_single; input [ADDR_BITS-1:0] addr; reg [SIZE_BITS-1:0] size; begin size = EXPR((DATA_BITS/32)+1); insert_rd_cmd(addr, 0, size); end endtask task read_single_ack; input [ADDR_BITS-1:0] addr; output [DATA_BITS-1:0] rdata; output [1:0] resp; reg [1:0] resp; begin insert_rd_single(addr); get_rd_resp(rdata, resp); end endtask task write_single_ack; input [ADDR_BITS-1:0] addr; input [DATA_BITS-1:0] wdata; output [1:0] resp; reg [1:0] resp; begin insert_wr_single(addr, wdata); get_wr_resp(resp); end endtask task read_single; input [ADDR_BITS-1:0] addr; output [DATA_BITS-1:0] rdata; reg [1:0] resp; begin read_single_ack(addr, rdata, resp); end endtask task check_single; input [ADDR_BITS-1:0] addr; input [DATA_BITS-1:0] expected; reg [1:0] resp; reg [DATA_BITS-1:0] rdata; begin read_single_ack(addr, rdata, resp); if (rdata !== expected) $display("MASTER%0d: CHK_SINGLE_ERROR: Address: 0x%0h, Expected: 0x%0h, Received: 0x%0h.\tTime: %0d ns.", MASTER_NUM, addr, expected, rdata, $time); end endtask task write_and_check_single; input [ADDR_BITS-1:0] addr; input [DATA_BITS-1:0] data; begin write_single(addr, data); check_single(addr, data); end endtask task write_single; input [ADDR_BITS-1:0] addr; input [DATA_BITS-1:0] wdata; reg [1:0] resp; begin write_single_ack(addr, wdata, resp); end endtask task chk_scrbrd; reg [ADDR_BITS-1:0] addr; reg [DATA_BITS-1:0] mask; reg [DATA_BITS-1:0] expected_data; reg [DATA_BITS-1:0] rdata; reg [DATA_BITS-1:0] rdata_masked; reg [1:0] resp; begin if (!wr_resp_empty) get_wr_resp(resp); get_scrbrd(addr, expected_data, mask); get_rd_resp(rdata, resp); expected_data = expected_data & mask; //TBD insert z as dontcare (for print) rdata_masked = rdata & mask; if (expected_data !== rdata_masked) $display("MASTER%0d: SCRBRD_ERROR: Address: 0x%0h, Expected: 0x%0h, Received: 0x%0h.\tTime: %0d ns.", MASTER_NUM, addr, expected_data, rdata, $time); end endtask always @(posedge scrbrd_enable) begin while (scrbrd_enable) begin chk_scrbrd; end end CREATE prgen_fifo.v DEFCMD(DEFINE STUB) prgen_fifo_stub #(ADDR_BITS+LEN_BITS+SIZE_BITS, MAX_CMDS) rd_cmd_list( .clk(clk), .reset(reset), .push(rd_cmd_push), .pop(rd_cmd_pop), .din({ rd_cmd_size_in, rd_cmd_len_in, rd_cmd_addr_in }), .dout({ rd_cmd_size, rd_cmd_len, rd_cmd_addr }), .fullness(rd_cmd_fullness), .empty(rd_cmd_empty), .full(rd_cmd_full) ); prgen_fifo_stub #(ADDR_BITS+SIZE_BITS, MAX_CMDS) rd_resp_list( .clk(clk), .reset(reset), .push(rd_resp_push), .pop(rd_resp_pop), .din({ rd_resp_addr_in, rd_resp_size_in }), .dout({ rd_resp_addr, rd_resp_size }), .empty(rd_resp_empty), .full(rd_resp_full) ); prgen_fifo_stub #(ADDR_BITS+LEN_BITS+SIZE_BITS, MAX_CMDS) wr_cmd_list( .clk(clk), .reset(reset), .push(wr_cmd_push), .pop(wr_cmd_pop), .din({ wr_cmd_size_in, wr_cmd_len_in, wr_cmd_addr_in }), .dout({ wr_cmd_size, wr_cmd_len, wr_cmd_addr }), .fullness(wr_cmd_fullness), .empty(wr_cmd_empty), .full(wr_cmd_full) ); prgen_fifo_stub #(ADDR_BITS+LEN_BITS+SIZE_BITS, MAX_CMDS) wr_data_list( .clk(clk), .reset(reset), .push(wr_data_push), .pop(wr_data_pop), .din({ wr_data_size_in, wr_data_len_in, wr_data_addr_in }), .dout({ wr_data_size, wr_data_len, wr_data_addr }), .fullness(wr_data_fullness), .empty(wr_data_empty), .full(wr_data_full) ); prgen_fifo_stub #(2, MAX_CMDS) wr_resp_list( .clk(clk), .reset(reset), .push(wr_resp_push), .pop(wr_resp_pop), .din(wr_resp_resp_in), .dout(wr_resp_resp), .empty(wr_resp_empty), .full(wr_resp_full) ); prgen_fifo_stub #(DATA_BITS, MAX_CMDS*EXPR(2^LEN_BITS)) wr_data_fifo( .clk(clk), .reset(reset), .push(wr_fifo_push), .pop(wr_fifo_pop), .din(wr_fifo_data_in), .dout(wr_fifo_data), .empty(wr_fifo_empty), .full(wr_fifo_full) ); prgen_fifo_stub #(DATA_BITS+2, MAX_CMDS*EXPR(2^LEN_BITS)) rd_data_fifo( .clk(clk), .reset(reset), .push(rd_fifo_push), .pop(rd_fifo_pop), .din({ rd_fifo_data_in, rd_fifo_resp_in }), .dout({ rd_fifo_data, rd_fifo_resp }), .empty(rd_fifo_empty), .full(rd_fifo_full) ); prgen_fifo_stub #(ADDR_BITS+2*DATA_BITS, MAX_CMDS*EXPR(2^LEN_BITS)) scrbrd_fifo( .clk(clk), .reset(reset), .push(scrbrd_push), .pop(scrbrd_pop), .din({ scrbrd_addr_in, scrbrd_data_in, scrbrd_mask_in }), .dout({ scrbrd_addr, scrbrd_data, scrbrd_mask }), .empty(scrbrd_empty), .full(scrbrd_full) ); CREATE axi_master_stall.v PREFIX_stall PREFIX_stall ( .clk(clk), .reset(reset), .rd_hold(rd_hold), .wr_hold(wr_hold), .ARVALID_pre(ARVALID_pre), .RREADY_pre(RREADY_pre), .AWVALID_pre(AWVALID_pre), .WVALID_pre(WVALID_pre), .BREADY_pre(BREADY_pre), .ARREADY(ARREADY), .AWREADY(AWREADY), .WREADY(WREADY), .ARVALID(ARVALID), .RREADY(RREADY), .AWVALID(AWVALID), .WVALID(WVALID), .BREADY(BREADY) ); endmodule
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