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[/] [openrisc/] [trunk/] [or1200/] [rtl/] [verilog/] [or1200_qmem_top.v] - Blame information for rev 67

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//////////////////////////////////////////////////////////////////////
////                                                              ////
////  OR1200's Embedded Memory                                    ////
////                                                              ////
////  This file is part of the OpenRISC 1200 project              ////
////  http://www.opencores.org/cores/or1k/                        ////
////                                                              ////
////  Description                                                 ////
////  Embedded Memory               .                             ////
////                                                              ////
////  To Do:                                                      ////
////   - QMEM and IC/DC muxes can be removed except for cycstb    ////
////     (now are is there for easier debugging)                  ////
////   - currently arbitration is slow and stores take 2 clocks   ////
////     (final debugged version will be faster)                  ////
////                                                              ////
////  Author(s):                                                  ////
////      - Damjan Lampret, lampret@opencores.org                 ////
////                                                              ////
//////////////////////////////////////////////////////////////////////
////                                                              ////
//// Copyright (C) 2003 Authors and OPENCORES.ORG                 ////
////                                                              ////
//// 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; ////
//// either version 2.1 of the License, or (at your option) any   ////
//// later version.                                               ////
////                                                              ////
//// 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.                                                     ////
////                                                              ////
//// You should have received a copy of the GNU Lesser General    ////
//// Public License along with this source; if not, download it   ////
//// from http://www.opencores.org/lgpl.shtml                     ////
////                                                              ////
//////////////////////////////////////////////////////////////////////
//
// CVS Revision History
//
// $Log: not supported by cvs2svn $
// Revision 1.2  2004/04/05 08:40:26  lampret
// Merged branch_qmem into main tree.
//
// Revision 1.1.2.4  2004/01/11 22:45:46  andreje
// Separate instruction and data QMEM decoders, QMEM acknowledge and byte-select added
//
// Revision 1.1.2.3  2003/12/17 13:36:58  simons
// Qmem mbist signals fixed.
//
// Revision 1.1.2.2  2003/12/09 11:46:48  simons
// Mbist nameing changed, Artisan ram instance signal names fixed, some synthesis waning fixed.
//
// Revision 1.1.2.1  2003/07/08 15:45:26  lampret
// Added embedded memory QMEM.
//
//
 
// synopsys translate_off
`include "timescale.v"
// synopsys translate_on
`include "or1200_defines.v"
 
`define OR1200_QMEMFSM_IDLE     3'd0
`define OR1200_QMEMFSM_STORE    3'd1
`define OR1200_QMEMFSM_LOAD     3'd2
`define OR1200_QMEMFSM_FETCH    3'd3
 
//
// Embedded memory
//
module or1200_qmem_top(
        // Rst, clk and clock control
        clk, rst,
 
`ifdef OR1200_BIST
        // RAM BIST
        mbist_si_i, mbist_so_o, mbist_ctrl_i,
`endif
 
        // QMEM and CPU/IMMU
        qmemimmu_adr_i,
        qmemimmu_cycstb_i,
        qmemimmu_ci_i,
        qmemicpu_sel_i,
        qmemicpu_tag_i,
        qmemicpu_dat_o,
        qmemicpu_ack_o,
        qmemimmu_rty_o,
        qmemimmu_err_o,
        qmemimmu_tag_o,
 
        // QMEM and IC
        icqmem_adr_o,
        icqmem_cycstb_o,
        icqmem_ci_o,
        icqmem_sel_o,
        icqmem_tag_o,
        icqmem_dat_i,
        icqmem_ack_i,
        icqmem_rty_i,
        icqmem_err_i,
        icqmem_tag_i,
 
        // QMEM and CPU/DMMU
        qmemdmmu_adr_i,
        qmemdmmu_cycstb_i,
        qmemdmmu_ci_i,
        qmemdcpu_we_i,
        qmemdcpu_sel_i,
        qmemdcpu_tag_i,
        qmemdcpu_dat_i,
        qmemdcpu_dat_o,
        qmemdcpu_ack_o,
        qmemdcpu_rty_o,
        qmemdmmu_err_o,
        qmemdmmu_tag_o,
 
        // QMEM and DC
        dcqmem_adr_o, dcqmem_cycstb_o, dcqmem_ci_o,
        dcqmem_we_o, dcqmem_sel_o, dcqmem_tag_o, dcqmem_dat_o,
        dcqmem_dat_i, dcqmem_ack_i, dcqmem_rty_i, dcqmem_err_i, dcqmem_tag_i
 
);
 
parameter dw = `OR1200_OPERAND_WIDTH;
 
//
// I/O
//
 
//
// Clock and reset
//
input                           clk;
input                           rst;
 
`ifdef OR1200_BIST
//
// RAM BIST
//
input mbist_si_i;
input [`OR1200_MBIST_CTRL_WIDTH - 1:0] mbist_ctrl_i;
output mbist_so_o;
`endif
 
//
// QMEM and CPU/IMMU
//
input   [31:0]                   qmemimmu_adr_i;
input                           qmemimmu_cycstb_i;
input                           qmemimmu_ci_i;
input   [3:0]                    qmemicpu_sel_i;
input   [3:0]                    qmemicpu_tag_i;
output  [31:0]                   qmemicpu_dat_o;
output                          qmemicpu_ack_o;
output                          qmemimmu_rty_o;
output                          qmemimmu_err_o;
output  [3:0]                    qmemimmu_tag_o;
 
//
// QMEM and IC
//
output  [31:0]                   icqmem_adr_o;
output                          icqmem_cycstb_o;
output                          icqmem_ci_o;
output  [3:0]                    icqmem_sel_o;
output  [3:0]                    icqmem_tag_o;
input   [31:0]                   icqmem_dat_i;
input                           icqmem_ack_i;
input                           icqmem_rty_i;
input                           icqmem_err_i;
input   [3:0]                    icqmem_tag_i;
 
//
// QMEM and CPU/DMMU
//
input   [31:0]                   qmemdmmu_adr_i;
input                           qmemdmmu_cycstb_i;
input                           qmemdmmu_ci_i;
input                           qmemdcpu_we_i;
input   [3:0]                    qmemdcpu_sel_i;
input   [3:0]                    qmemdcpu_tag_i;
input   [31:0]                   qmemdcpu_dat_i;
output  [31:0]                   qmemdcpu_dat_o;
output                          qmemdcpu_ack_o;
output                          qmemdcpu_rty_o;
output                          qmemdmmu_err_o;
output  [3:0]                    qmemdmmu_tag_o;
 
//
// QMEM and DC
//
output  [31:0]                   dcqmem_adr_o;
output                          dcqmem_cycstb_o;
output                          dcqmem_ci_o;
output                          dcqmem_we_o;
output  [3:0]                    dcqmem_sel_o;
output  [3:0]                    dcqmem_tag_o;
output  [dw-1:0]         dcqmem_dat_o;
input   [dw-1:0]         dcqmem_dat_i;
input                           dcqmem_ack_i;
input                           dcqmem_rty_i;
input                           dcqmem_err_i;
input   [3:0]                    dcqmem_tag_i;
 
`ifdef OR1200_QMEM_IMPLEMENTED
 
//
// Internal regs and wires
//
wire                            iaddr_qmem_hit;
wire                            daddr_qmem_hit;
reg     [2:0]                    state;
reg                             qmem_dack;
reg                             qmem_iack;
wire    [31:0]                   qmem_di;
wire    [31:0]                   qmem_do;
wire                            qmem_en;
wire                            qmem_we;
`ifdef OR1200_QMEM_BSEL
wire  [3:0]       qmem_sel;
`endif
wire    [31:0]                   qmem_addr;
`ifdef OR1200_QMEM_ACK
wire              qmem_ack;
`else
wire              qmem_ack = 1'b1;
`endif
 
//
// QMEM and CPU/IMMU
//
assign qmemicpu_dat_o = qmem_iack ? qmem_do : icqmem_dat_i;
assign qmemicpu_ack_o = qmem_iack ? 1'b1 : icqmem_ack_i;
assign qmemimmu_rty_o = qmem_iack ? 1'b0 : icqmem_rty_i;
assign qmemimmu_err_o = qmem_iack ? 1'b0 : icqmem_err_i;
assign qmemimmu_tag_o = qmem_iack ? 4'h0 : icqmem_tag_i;
 
//
// QMEM and IC
//
assign icqmem_adr_o = iaddr_qmem_hit ? 32'h0000_0000 : qmemimmu_adr_i;
assign icqmem_cycstb_o = iaddr_qmem_hit ? 1'b0 : qmemimmu_cycstb_i;
assign icqmem_ci_o = iaddr_qmem_hit ? 1'b0 : qmemimmu_ci_i;
assign icqmem_sel_o = iaddr_qmem_hit ? 4'h0 : qmemicpu_sel_i;
assign icqmem_tag_o = iaddr_qmem_hit ? 4'h0 : qmemicpu_tag_i;
 
//
// QMEM and CPU/DMMU
//
assign qmemdcpu_dat_o = daddr_qmem_hit ? qmem_do : dcqmem_dat_i;
assign qmemdcpu_ack_o = daddr_qmem_hit ? qmem_dack : dcqmem_ack_i;
assign qmemdcpu_rty_o = daddr_qmem_hit ? ~qmem_dack : dcqmem_rty_i;
assign qmemdmmu_err_o = daddr_qmem_hit ? 1'b0 : dcqmem_err_i;
assign qmemdmmu_tag_o = daddr_qmem_hit ? 4'h0 : dcqmem_tag_i;
 
//
// QMEM and DC
//
assign dcqmem_adr_o = daddr_qmem_hit ? 32'h0000_0000 : qmemdmmu_adr_i;
assign dcqmem_cycstb_o = daddr_qmem_hit ? 1'b0 : qmemdmmu_cycstb_i;
assign dcqmem_ci_o = daddr_qmem_hit ? 1'b0 : qmemdmmu_ci_i;
assign dcqmem_we_o = daddr_qmem_hit ? 1'b0 : qmemdcpu_we_i;
assign dcqmem_sel_o = daddr_qmem_hit ? 4'h0 : qmemdcpu_sel_i;
assign dcqmem_tag_o = daddr_qmem_hit ? 4'h0 : qmemdcpu_tag_i;
assign dcqmem_dat_o = daddr_qmem_hit ? 32'h0000_0000 : qmemdcpu_dat_i;
 
//
// Address comparison whether QMEM was hit
//
`ifdef OR1200_QMEM_IADDR
assign iaddr_qmem_hit = (qmemimmu_adr_i & `OR1200_QMEM_IMASK) == `OR1200_QMEM_IADDR;
`else
assign iaddr_qmem_hit = 1'b0;
`endif
 
`ifdef OR1200_QMEM_DADDR
assign daddr_qmem_hit = (qmemdmmu_adr_i & `OR1200_QMEM_DMASK) == `OR1200_QMEM_DADDR;
`else
assign daddr_qmem_hit = 1'b0;
`endif
 
//
//
//
assign qmem_en = iaddr_qmem_hit & qmemimmu_cycstb_i | daddr_qmem_hit & qmemdmmu_cycstb_i;
assign qmem_we = qmemdmmu_cycstb_i & daddr_qmem_hit & qmemdcpu_we_i;
`ifdef OR1200_QMEM_BSEL
assign qmem_sel = (qmemdmmu_cycstb_i & daddr_qmem_hit) ? qmemdcpu_sel_i : qmemicpu_sel_i;
`endif
assign qmem_di = qmemdcpu_dat_i;
assign qmem_addr = (qmemdmmu_cycstb_i & daddr_qmem_hit) ? qmemdmmu_adr_i : qmemimmu_adr_i;
 
//
// QMEM control FSM
//
always @(posedge rst or posedge clk)
        if (rst) begin
                state <= #1 `OR1200_QMEMFSM_IDLE;
                qmem_dack <= #1 1'b0;
                qmem_iack <= #1 1'b0;
        end
        else case (state)       // synopsys parallel_case
                `OR1200_QMEMFSM_IDLE: begin
                        if (qmemdmmu_cycstb_i & daddr_qmem_hit & qmemdcpu_we_i & qmem_ack) begin
                                state <= #1 `OR1200_QMEMFSM_STORE;
                                qmem_dack <= #1 1'b1;
                                qmem_iack <= #1 1'b0;
                        end
                        else if (qmemdmmu_cycstb_i & daddr_qmem_hit & qmem_ack) begin
                                state <= #1 `OR1200_QMEMFSM_LOAD;
                                qmem_dack <= #1 1'b1;
                                qmem_iack <= #1 1'b0;
                        end
                        else if (qmemimmu_cycstb_i & iaddr_qmem_hit & qmem_ack) begin
                                state <= #1 `OR1200_QMEMFSM_FETCH;
                                qmem_iack <= #1 1'b1;
                                qmem_dack <= #1 1'b0;
                        end
                end
                `OR1200_QMEMFSM_STORE: begin
                        if (qmemdmmu_cycstb_i & daddr_qmem_hit & qmemdcpu_we_i & qmem_ack) begin
                                state <= #1 `OR1200_QMEMFSM_STORE;
                                qmem_dack <= #1 1'b1;
                                qmem_iack <= #1 1'b0;
                        end
                        else if (qmemdmmu_cycstb_i & daddr_qmem_hit & qmem_ack) begin
                                state <= #1 `OR1200_QMEMFSM_LOAD;
                                qmem_dack <= #1 1'b1;
                                qmem_iack <= #1 1'b0;
                        end
                        else if (qmemimmu_cycstb_i & iaddr_qmem_hit & qmem_ack) begin
                                state <= #1 `OR1200_QMEMFSM_FETCH;
                                qmem_iack <= #1 1'b1;
                                qmem_dack <= #1 1'b0;
                        end
                        else begin
                                state <= #1 `OR1200_QMEMFSM_IDLE;
                                qmem_dack <= #1 1'b0;
                                qmem_iack <= #1 1'b0;
                        end
                end
                `OR1200_QMEMFSM_LOAD: begin
                        if (qmemdmmu_cycstb_i & daddr_qmem_hit & qmemdcpu_we_i & qmem_ack) begin
                                state <= #1 `OR1200_QMEMFSM_STORE;
                                qmem_dack <= #1 1'b1;
                                qmem_iack <= #1 1'b0;
                        end
                        else if (qmemdmmu_cycstb_i & daddr_qmem_hit & qmem_ack) begin
                                state <= #1 `OR1200_QMEMFSM_LOAD;
                                qmem_dack <= #1 1'b1;
                                qmem_iack <= #1 1'b0;
                        end
                        else if (qmemimmu_cycstb_i & iaddr_qmem_hit & qmem_ack) begin
                                state <= #1 `OR1200_QMEMFSM_FETCH;
                                qmem_iack <= #1 1'b1;
                                qmem_dack <= #1 1'b0;
                        end
                        else begin
                                state <= #1 `OR1200_QMEMFSM_IDLE;
                                qmem_dack <= #1 1'b0;
                                qmem_iack <= #1 1'b0;
                        end
                end
                `OR1200_QMEMFSM_FETCH: begin
                        if (qmemdmmu_cycstb_i & daddr_qmem_hit & qmemdcpu_we_i & qmem_ack) begin
                                state <= #1 `OR1200_QMEMFSM_STORE;
                                qmem_dack <= #1 1'b1;
                                qmem_iack <= #1 1'b0;
                        end
                        else if (qmemdmmu_cycstb_i & daddr_qmem_hit & qmem_ack) begin
                                state <= #1 `OR1200_QMEMFSM_LOAD;
                                qmem_dack <= #1 1'b1;
                                qmem_iack <= #1 1'b0;
                        end
                        else if (qmemimmu_cycstb_i & iaddr_qmem_hit & qmem_ack) begin
                                state <= #1 `OR1200_QMEMFSM_FETCH;
                                qmem_iack <= #1 1'b1;
                                qmem_dack <= #1 1'b0;
                        end
                        else begin
                                state <= #1 `OR1200_QMEMFSM_IDLE;
                                qmem_dack <= #1 1'b0;
                                qmem_iack <= #1 1'b0;
                        end
                end
                default: begin
                        state <= #1 `OR1200_QMEMFSM_IDLE;
                        qmem_dack <= #1 1'b0;
                        qmem_iack <= #1 1'b0;
                end
        endcase
 
//
// Instantiation of embedded memory
//
or1200_spram_2048x32 or1200_qmem_ram(
        .clk(clk),
        .rst(rst),
`ifdef OR1200_BIST
        // RAM BIST
        .mbist_si_i(mbist_si_i),
        .mbist_so_o(mbist_so_o),
        .mbist_ctrl_i(mbist_ctrl_i),
`endif
        .addr(qmem_addr[12:2]),
`ifdef OR1200_QMEM_BSEL
        .sel(qmem_sel),
`endif
`ifdef OR1200_QMEM_ACK
  .ack(qmem_ack),
`endif
  .ce(qmem_en),
        .we(qmem_we),
        .oe(1'b1),
        .di(qmem_di),
        .doq(qmem_do)
);
 
`else  // OR1200_QMEM_IMPLEMENTED
 
//
// QMEM and CPU/IMMU
//
assign qmemicpu_dat_o = icqmem_dat_i;
assign qmemicpu_ack_o = icqmem_ack_i;
assign qmemimmu_rty_o = icqmem_rty_i;
assign qmemimmu_err_o = icqmem_err_i;
assign qmemimmu_tag_o = icqmem_tag_i;
 
//
// QMEM and IC
//
assign icqmem_adr_o = qmemimmu_adr_i;
assign icqmem_cycstb_o = qmemimmu_cycstb_i;
assign icqmem_ci_o = qmemimmu_ci_i;
assign icqmem_sel_o = qmemicpu_sel_i;
assign icqmem_tag_o = qmemicpu_tag_i;
 
//
// QMEM and CPU/DMMU
//
assign qmemdcpu_dat_o = dcqmem_dat_i;
assign qmemdcpu_ack_o = dcqmem_ack_i;
assign qmemdcpu_rty_o = dcqmem_rty_i;
assign qmemdmmu_err_o = dcqmem_err_i;
assign qmemdmmu_tag_o = dcqmem_tag_i;
 
//
// QMEM and DC
//
assign dcqmem_adr_o = qmemdmmu_adr_i;
assign dcqmem_cycstb_o = qmemdmmu_cycstb_i;
assign dcqmem_ci_o = qmemdmmu_ci_i;
assign dcqmem_we_o = qmemdcpu_we_i;
assign dcqmem_sel_o = qmemdcpu_sel_i;
assign dcqmem_tag_o = qmemdcpu_tag_i;
assign dcqmem_dat_o = qmemdcpu_dat_i;
 
`ifdef OR1200_BIST
assign mbist_so_o = mbist_si_i;
`endif
 
`endif
 
endmodule

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Subversion Repositories openrisc

[/] [openrisc/] [trunk/] [or1200/] [rtl/] [verilog/] [or1200_qmem_top.v] - Blame information for rev 67

Line No.	Rev	Author	Line
1	10	unneback	`//////////////////////////////////////////////////////////////////////`
2			`//// ////`
3			`//// OR1200's Embedded Memory ////`
4			`//// ////`
5			`//// This file is part of the OpenRISC 1200 project ////`
6			`//// http://www.opencores.org/cores/or1k/ ////`
7			`//// ////`
8			`//// Description ////`
9			`//// Embedded Memory . ////`
10			`//// ////`
11			`//// To Do: ////`
12			`//// - QMEM and IC/DC muxes can be removed except for cycstb ////`
13			`//// (now are is there for easier debugging) ////`
14			`//// - currently arbitration is slow and stores take 2 clocks ////`
15			`//// (final debugged version will be faster) ////`
16			`//// ////`
17			`//// Author(s): ////`
18			`//// - Damjan Lampret, lampret@opencores.org ////`
19			`//// ////`
20			`//////////////////////////////////////////////////////////////////////`
21			`//// ////`
22			`//// Copyright (C) 2003 Authors and OPENCORES.ORG ////`
23			`//// ////`
24			`//// This source file may be used and distributed without ////`
25			`//// restriction provided that this copyright statement is not ////`
26			`//// removed from the file and that any derivative work contains ////`
27			`//// the original copyright notice and the associated disclaimer. ////`
28			`//// ////`
29			`//// This source file is free software; you can redistribute it ////`
30			`//// and/or modify it under the terms of the GNU Lesser General ////`
31			`//// Public License as published by the Free Software Foundation; ////`
32			`//// either version 2.1 of the License, or (at your option) any ////`
33			`//// later version. ////`
34			`//// ////`
35			`//// This source is distributed in the hope that it will be ////`
36			`//// useful, but WITHOUT ANY WARRANTY; without even the implied ////`
37			`//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR ////`
38			`//// PURPOSE. See the GNU Lesser General Public License for more ////`
39			`//// details. ////`
40			`//// ////`
41			`//// You should have received a copy of the GNU Lesser General ////`
42			`//// Public License along with this source; if not, download it ////`
43			`//// from http://www.opencores.org/lgpl.shtml ////`
44			`//// ////`
45			`//////////////////////////////////////////////////////////////////////`
46			`//`
47			`// CVS Revision History`
48			`//`
49			`// $Log: not supported by cvs2svn $`
50			`// Revision 1.2 2004/04/05 08:40:26 lampret`
51			`// Merged branch_qmem into main tree.`
52			`//`
53			`// Revision 1.1.2.4 2004/01/11 22:45:46 andreje`
54			`// Separate instruction and data QMEM decoders, QMEM acknowledge and byte-select added`
55			`//`
56			`// Revision 1.1.2.3 2003/12/17 13:36:58 simons`
57			`// Qmem mbist signals fixed.`
58			`//`
59			`// Revision 1.1.2.2 2003/12/09 11:46:48 simons`
60			`// Mbist nameing changed, Artisan ram instance signal names fixed, some synthesis waning fixed.`
61			`//`
62			`// Revision 1.1.2.1 2003/07/08 15:45:26 lampret`
63			`// Added embedded memory QMEM.`
64			`//`
65			`//`
66
67			`// synopsys translate_off`
68			`include "timescale.v"
69			`// synopsys translate_on`
70			`include "or1200_defines.v"
71
72			`define OR1200_QMEMFSM_IDLE 3'd0
73			`define OR1200_QMEMFSM_STORE 3'd1
74			`define OR1200_QMEMFSM_LOAD 3'd2
75			`define OR1200_QMEMFSM_FETCH 3'd3
76
77			`//`
78			`// Embedded memory`
79			`//`
80			`module or1200_qmem_top(`
81			`// Rst, clk and clock control`
82			`clk, rst,`
83
84			`ifdef OR1200_BIST
85			`// RAM BIST`
86			`mbist_si_i, mbist_so_o, mbist_ctrl_i,`
87			`endif
88
89			`// QMEM and CPU/IMMU`
90			`qmemimmu_adr_i,`
91			`qmemimmu_cycstb_i,`
92			`qmemimmu_ci_i,`
93			`qmemicpu_sel_i,`
94			`qmemicpu_tag_i,`
95			`qmemicpu_dat_o,`
96			`qmemicpu_ack_o,`
97			`qmemimmu_rty_o,`
98			`qmemimmu_err_o,`
99			`qmemimmu_tag_o,`
100
101			`// QMEM and IC`
102			`icqmem_adr_o,`
103			`icqmem_cycstb_o,`
104			`icqmem_ci_o,`
105			`icqmem_sel_o,`
106			`icqmem_tag_o,`
107			`icqmem_dat_i,`
108			`icqmem_ack_i,`
109			`icqmem_rty_i,`
110			`icqmem_err_i,`
111			`icqmem_tag_i,`
112
113			`// QMEM and CPU/DMMU`
114			`qmemdmmu_adr_i,`
115			`qmemdmmu_cycstb_i,`
116			`qmemdmmu_ci_i,`
117			`qmemdcpu_we_i,`
118			`qmemdcpu_sel_i,`
119			`qmemdcpu_tag_i,`
120			`qmemdcpu_dat_i,`
121			`qmemdcpu_dat_o,`
122			`qmemdcpu_ack_o,`
123			`qmemdcpu_rty_o,`
124			`qmemdmmu_err_o,`
125			`qmemdmmu_tag_o,`
126
127			`// QMEM and DC`
128			`dcqmem_adr_o, dcqmem_cycstb_o, dcqmem_ci_o,`
129			`dcqmem_we_o, dcqmem_sel_o, dcqmem_tag_o, dcqmem_dat_o,`
130			`dcqmem_dat_i, dcqmem_ack_i, dcqmem_rty_i, dcqmem_err_i, dcqmem_tag_i`
131
132			`);`
133
134			parameter dw = `OR1200_OPERAND_WIDTH;
135
136			`//`
137			`// I/O`
138			`//`
139
140			`//`
141			`// Clock and reset`
142			`//`
143			`input clk;`
144			`input rst;`
145
146			`ifdef OR1200_BIST
147			`//`
148			`// RAM BIST`
149			`//`
150			`input mbist_si_i;`
151			input [`OR1200_MBIST_CTRL_WIDTH - 1:0] mbist_ctrl_i;
152			`output mbist_so_o;`
153			`endif
154
155			`//`
156			`// QMEM and CPU/IMMU`
157			`//`
158			`input [31:0] qmemimmu_adr_i;`
159			`input qmemimmu_cycstb_i;`
160			`input qmemimmu_ci_i;`
161			`input [3:0] qmemicpu_sel_i;`
162			`input [3:0] qmemicpu_tag_i;`
163			`output [31:0] qmemicpu_dat_o;`
164			`output qmemicpu_ack_o;`
165			`output qmemimmu_rty_o;`
166			`output qmemimmu_err_o;`
167			`output [3:0] qmemimmu_tag_o;`
168
169			`//`
170			`// QMEM and IC`
171			`//`
172			`output [31:0] icqmem_adr_o;`
173			`output icqmem_cycstb_o;`
174			`output icqmem_ci_o;`
175			`output [3:0] icqmem_sel_o;`
176			`output [3:0] icqmem_tag_o;`
177			`input [31:0] icqmem_dat_i;`
178			`input icqmem_ack_i;`
179			`input icqmem_rty_i;`
180			`input icqmem_err_i;`
181			`input [3:0] icqmem_tag_i;`
182
183			`//`
184			`// QMEM and CPU/DMMU`
185			`//`
186			`input [31:0] qmemdmmu_adr_i;`
187			`input qmemdmmu_cycstb_i;`
188			`input qmemdmmu_ci_i;`
189			`input qmemdcpu_we_i;`
190			`input [3:0] qmemdcpu_sel_i;`
191			`input [3:0] qmemdcpu_tag_i;`
192			`input [31:0] qmemdcpu_dat_i;`
193			`output [31:0] qmemdcpu_dat_o;`
194			`output qmemdcpu_ack_o;`
195			`output qmemdcpu_rty_o;`
196			`output qmemdmmu_err_o;`
197			`output [3:0] qmemdmmu_tag_o;`
198
199			`//`
200			`// QMEM and DC`
201			`//`
202			`output [31:0] dcqmem_adr_o;`
203			`output dcqmem_cycstb_o;`
204			`output dcqmem_ci_o;`
205			`output dcqmem_we_o;`
206			`output [3:0] dcqmem_sel_o;`
207			`output [3:0] dcqmem_tag_o;`
208			`output [dw-1:0] dcqmem_dat_o;`
209			`input [dw-1:0] dcqmem_dat_i;`
210			`input dcqmem_ack_i;`
211			`input dcqmem_rty_i;`
212			`input dcqmem_err_i;`
213			`input [3:0] dcqmem_tag_i;`
214
215			`ifdef OR1200_QMEM_IMPLEMENTED
216
217			`//`
218			`// Internal regs and wires`
219			`//`
220			`wire iaddr_qmem_hit;`
221			`wire daddr_qmem_hit;`
222			`reg [2:0] state;`
223			`reg qmem_dack;`
224			`reg qmem_iack;`
225			`wire [31:0] qmem_di;`
226			`wire [31:0] qmem_do;`
227			`wire qmem_en;`
228			`wire qmem_we;`
229			`ifdef OR1200_QMEM_BSEL
230			`wire [3:0] qmem_sel;`
231			`endif
232			`wire [31:0] qmem_addr;`
233			`ifdef OR1200_QMEM_ACK
234			`wire qmem_ack;`
235			`else
236			`wire qmem_ack = 1'b1;`
237			`endif
238
239			`//`
240			`// QMEM and CPU/IMMU`
241			`//`
242			`assign qmemicpu_dat_o = qmem_iack ? qmem_do : icqmem_dat_i;`
243			`assign qmemicpu_ack_o = qmem_iack ? 1'b1 : icqmem_ack_i;`
244			`assign qmemimmu_rty_o = qmem_iack ? 1'b0 : icqmem_rty_i;`
245			`assign qmemimmu_err_o = qmem_iack ? 1'b0 : icqmem_err_i;`
246			`assign qmemimmu_tag_o = qmem_iack ? 4'h0 : icqmem_tag_i;`
247
248			`//`
249			`// QMEM and IC`
250			`//`
251			`assign icqmem_adr_o = iaddr_qmem_hit ? 32'h0000_0000 : qmemimmu_adr_i;`
252			`assign icqmem_cycstb_o = iaddr_qmem_hit ? 1'b0 : qmemimmu_cycstb_i;`
253			`assign icqmem_ci_o = iaddr_qmem_hit ? 1'b0 : qmemimmu_ci_i;`
254			`assign icqmem_sel_o = iaddr_qmem_hit ? 4'h0 : qmemicpu_sel_i;`
255			`assign icqmem_tag_o = iaddr_qmem_hit ? 4'h0 : qmemicpu_tag_i;`
256
257			`//`
258			`// QMEM and CPU/DMMU`
259			`//`
260			`assign qmemdcpu_dat_o = daddr_qmem_hit ? qmem_do : dcqmem_dat_i;`
261			`assign qmemdcpu_ack_o = daddr_qmem_hit ? qmem_dack : dcqmem_ack_i;`
262			`assign qmemdcpu_rty_o = daddr_qmem_hit ? ~qmem_dack : dcqmem_rty_i;`
263			`assign qmemdmmu_err_o = daddr_qmem_hit ? 1'b0 : dcqmem_err_i;`
264			`assign qmemdmmu_tag_o = daddr_qmem_hit ? 4'h0 : dcqmem_tag_i;`
265
266			`//`
267			`// QMEM and DC`
268			`//`
269			`assign dcqmem_adr_o = daddr_qmem_hit ? 32'h0000_0000 : qmemdmmu_adr_i;`
270			`assign dcqmem_cycstb_o = daddr_qmem_hit ? 1'b0 : qmemdmmu_cycstb_i;`
271			`assign dcqmem_ci_o = daddr_qmem_hit ? 1'b0 : qmemdmmu_ci_i;`
272			`assign dcqmem_we_o = daddr_qmem_hit ? 1'b0 : qmemdcpu_we_i;`
273			`assign dcqmem_sel_o = daddr_qmem_hit ? 4'h0 : qmemdcpu_sel_i;`
274			`assign dcqmem_tag_o = daddr_qmem_hit ? 4'h0 : qmemdcpu_tag_i;`
275			`assign dcqmem_dat_o = daddr_qmem_hit ? 32'h0000_0000 : qmemdcpu_dat_i;`
276
277			`//`
278			`// Address comparison whether QMEM was hit`
279			`//`
280			`ifdef OR1200_QMEM_IADDR
281			assign iaddr_qmem_hit = (qmemimmu_adr_i & `OR1200_QMEM_IMASK) == `OR1200_QMEM_IADDR;
282			`else
283			`assign iaddr_qmem_hit = 1'b0;`
284			`endif
285
286			`ifdef OR1200_QMEM_DADDR
287			assign daddr_qmem_hit = (qmemdmmu_adr_i & `OR1200_QMEM_DMASK) == `OR1200_QMEM_DADDR;
288			`else
289			`assign daddr_qmem_hit = 1'b0;`
290			`endif
291
292			`//`
293			`//`
294			`//`
295			`assign qmem_en = iaddr_qmem_hit & qmemimmu_cycstb_i \| daddr_qmem_hit & qmemdmmu_cycstb_i;`
296			`assign qmem_we = qmemdmmu_cycstb_i & daddr_qmem_hit & qmemdcpu_we_i;`
297			`ifdef OR1200_QMEM_BSEL
298			`assign qmem_sel = (qmemdmmu_cycstb_i & daddr_qmem_hit) ? qmemdcpu_sel_i : qmemicpu_sel_i;`
299			`endif
300			`assign qmem_di = qmemdcpu_dat_i;`
301			`assign qmem_addr = (qmemdmmu_cycstb_i & daddr_qmem_hit) ? qmemdmmu_adr_i : qmemimmu_adr_i;`
302
303			`//`
304			`// QMEM control FSM`
305			`//`
306			`always @(posedge rst or posedge clk)`
307			`if (rst) begin`
308			state <= #1 `OR1200_QMEMFSM_IDLE;
309			`qmem_dack <= #1 1'b0;`
310			`qmem_iack <= #1 1'b0;`
311			`end`
312			`else case (state) // synopsys parallel_case`
313			`OR1200_QMEMFSM_IDLE: begin
314			`if (qmemdmmu_cycstb_i & daddr_qmem_hit & qmemdcpu_we_i & qmem_ack) begin`
315			state <= #1 `OR1200_QMEMFSM_STORE;
316			`qmem_dack <= #1 1'b1;`
317			`qmem_iack <= #1 1'b0;`
318			`end`
319			`else if (qmemdmmu_cycstb_i & daddr_qmem_hit & qmem_ack) begin`
320			state <= #1 `OR1200_QMEMFSM_LOAD;
321			`qmem_dack <= #1 1'b1;`
322			`qmem_iack <= #1 1'b0;`
323			`end`
324			`else if (qmemimmu_cycstb_i & iaddr_qmem_hit & qmem_ack) begin`
325			state <= #1 `OR1200_QMEMFSM_FETCH;
326			`qmem_iack <= #1 1'b1;`
327			`qmem_dack <= #1 1'b0;`
328			`end`
329			`end`
330			`OR1200_QMEMFSM_STORE: begin
331			`if (qmemdmmu_cycstb_i & daddr_qmem_hit & qmemdcpu_we_i & qmem_ack) begin`
332			state <= #1 `OR1200_QMEMFSM_STORE;
333			`qmem_dack <= #1 1'b1;`
334			`qmem_iack <= #1 1'b0;`
335			`end`
336			`else if (qmemdmmu_cycstb_i & daddr_qmem_hit & qmem_ack) begin`
337			state <= #1 `OR1200_QMEMFSM_LOAD;
338			`qmem_dack <= #1 1'b1;`
339			`qmem_iack <= #1 1'b0;`
340			`end`
341			`else if (qmemimmu_cycstb_i & iaddr_qmem_hit & qmem_ack) begin`
342			state <= #1 `OR1200_QMEMFSM_FETCH;
343			`qmem_iack <= #1 1'b1;`
344			`qmem_dack <= #1 1'b0;`
345			`end`
346			`else begin`
347			state <= #1 `OR1200_QMEMFSM_IDLE;
348			`qmem_dack <= #1 1'b0;`
349			`qmem_iack <= #1 1'b0;`
350			`end`
351			`end`
352			`OR1200_QMEMFSM_LOAD: begin
353			`if (qmemdmmu_cycstb_i & daddr_qmem_hit & qmemdcpu_we_i & qmem_ack) begin`
354			state <= #1 `OR1200_QMEMFSM_STORE;
355			`qmem_dack <= #1 1'b1;`
356			`qmem_iack <= #1 1'b0;`
357			`end`
358			`else if (qmemdmmu_cycstb_i & daddr_qmem_hit & qmem_ack) begin`
359			state <= #1 `OR1200_QMEMFSM_LOAD;
360			`qmem_dack <= #1 1'b1;`
361			`qmem_iack <= #1 1'b0;`
362			`end`
363			`else if (qmemimmu_cycstb_i & iaddr_qmem_hit & qmem_ack) begin`
364			state <= #1 `OR1200_QMEMFSM_FETCH;
365			`qmem_iack <= #1 1'b1;`
366			`qmem_dack <= #1 1'b0;`
367			`end`
368			`else begin`
369			state <= #1 `OR1200_QMEMFSM_IDLE;
370			`qmem_dack <= #1 1'b0;`
371			`qmem_iack <= #1 1'b0;`
372			`end`
373			`end`
374			`OR1200_QMEMFSM_FETCH: begin
375			`if (qmemdmmu_cycstb_i & daddr_qmem_hit & qmemdcpu_we_i & qmem_ack) begin`
376			state <= #1 `OR1200_QMEMFSM_STORE;
377			`qmem_dack <= #1 1'b1;`
378			`qmem_iack <= #1 1'b0;`
379			`end`
380			`else if (qmemdmmu_cycstb_i & daddr_qmem_hit & qmem_ack) begin`
381			state <= #1 `OR1200_QMEMFSM_LOAD;
382			`qmem_dack <= #1 1'b1;`
383			`qmem_iack <= #1 1'b0;`
384			`end`
385			`else if (qmemimmu_cycstb_i & iaddr_qmem_hit & qmem_ack) begin`
386			state <= #1 `OR1200_QMEMFSM_FETCH;
387			`qmem_iack <= #1 1'b1;`
388			`qmem_dack <= #1 1'b0;`
389			`end`
390			`else begin`
391			state <= #1 `OR1200_QMEMFSM_IDLE;
392			`qmem_dack <= #1 1'b0;`
393			`qmem_iack <= #1 1'b0;`
394			`end`
395			`end`
396			`default: begin`
397			state <= #1 `OR1200_QMEMFSM_IDLE;
398			`qmem_dack <= #1 1'b0;`
399			`qmem_iack <= #1 1'b0;`
400			`end`
401			`endcase`
402
403			`//`
404			`// Instantiation of embedded memory`
405			`//`
406			`or1200_spram_2048x32 or1200_qmem_ram(`
407			`.clk(clk),`
408			`.rst(rst),`
409			`ifdef OR1200_BIST
410			`// RAM BIST`
411			`.mbist_si_i(mbist_si_i),`
412			`.mbist_so_o(mbist_so_o),`
413			`.mbist_ctrl_i(mbist_ctrl_i),`
414			`endif
415			`.addr(qmem_addr[12:2]),`
416			`ifdef OR1200_QMEM_BSEL
417			`.sel(qmem_sel),`
418			`endif
419			`ifdef OR1200_QMEM_ACK
420			`.ack(qmem_ack),`
421			`endif
422			`.ce(qmem_en),`
423			`.we(qmem_we),`
424			`.oe(1'b1),`
425			`.di(qmem_di),`
426			`.doq(qmem_do)`
427			`);`
428
429			`else // OR1200_QMEM_IMPLEMENTED
430
431			`//`
432			`// QMEM and CPU/IMMU`
433			`//`
434			`assign qmemicpu_dat_o = icqmem_dat_i;`
435			`assign qmemicpu_ack_o = icqmem_ack_i;`
436			`assign qmemimmu_rty_o = icqmem_rty_i;`
437			`assign qmemimmu_err_o = icqmem_err_i;`
438			`assign qmemimmu_tag_o = icqmem_tag_i;`
439
440			`//`
441			`// QMEM and IC`
442			`//`
443			`assign icqmem_adr_o = qmemimmu_adr_i;`
444			`assign icqmem_cycstb_o = qmemimmu_cycstb_i;`
445			`assign icqmem_ci_o = qmemimmu_ci_i;`
446			`assign icqmem_sel_o = qmemicpu_sel_i;`
447			`assign icqmem_tag_o = qmemicpu_tag_i;`
448
449			`//`
450			`// QMEM and CPU/DMMU`
451			`//`
452			`assign qmemdcpu_dat_o = dcqmem_dat_i;`
453			`assign qmemdcpu_ack_o = dcqmem_ack_i;`
454			`assign qmemdcpu_rty_o = dcqmem_rty_i;`
455			`assign qmemdmmu_err_o = dcqmem_err_i;`
456			`assign qmemdmmu_tag_o = dcqmem_tag_i;`
457
458			`//`
459			`// QMEM and DC`
460			`//`
461			`assign dcqmem_adr_o = qmemdmmu_adr_i;`
462			`assign dcqmem_cycstb_o = qmemdmmu_cycstb_i;`
463			`assign dcqmem_ci_o = qmemdmmu_ci_i;`
464			`assign dcqmem_we_o = qmemdcpu_we_i;`
465			`assign dcqmem_sel_o = qmemdcpu_sel_i;`
466			`assign dcqmem_tag_o = qmemdcpu_tag_i;`
467			`assign dcqmem_dat_o = qmemdcpu_dat_i;`
468
469			`ifdef OR1200_BIST
470			`assign mbist_so_o = mbist_si_i;`
471			`endif
472
473			`endif
474
475			`endmodule`