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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: or1200_qmem_top.v,v $
// Revision 2.0  2010/06/30 11:00:00  ORSoC
// Minor update: 
// Coding style changed.
//
// Revision 1.3  2004/06/08 18:17:36  lampret
// Non-functional changes. Coding style fixes.
//
// 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 <=  `OR1200_QMEMFSM_IDLE;
                qmem_dack <=  1'b0;
                qmem_iack <=  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 <=  `OR1200_QMEMFSM_STORE;
                                qmem_dack <=  1'b1;
                                qmem_iack <=  1'b0;
                        end
                        else if (qmemdmmu_cycstb_i & daddr_qmem_hit & qmem_ack) begin
                                state <=  `OR1200_QMEMFSM_LOAD;
                                qmem_dack <=  1'b1;
                                qmem_iack <=  1'b0;
                        end
                        else if (qmemimmu_cycstb_i & iaddr_qmem_hit & qmem_ack) begin
                                state <=  `OR1200_QMEMFSM_FETCH;
                                qmem_iack <=  1'b1;
                                qmem_dack <=  1'b0;
                        end
                end
                `OR1200_QMEMFSM_STORE: begin
                        if (qmemdmmu_cycstb_i & daddr_qmem_hit & qmemdcpu_we_i & qmem_ack) begin
                                state <=  `OR1200_QMEMFSM_STORE;
                                qmem_dack <=  1'b1;
                                qmem_iack <=  1'b0;
                        end
                        else if (qmemdmmu_cycstb_i & daddr_qmem_hit & qmem_ack) begin
                                state <=  `OR1200_QMEMFSM_LOAD;
                                qmem_dack <=  1'b1;
                                qmem_iack <=  1'b0;
                        end
                        else if (qmemimmu_cycstb_i & iaddr_qmem_hit & qmem_ack) begin
                                state <=  `OR1200_QMEMFSM_FETCH;
                                qmem_iack <=  1'b1;
                                qmem_dack <=  1'b0;
                        end
                        else begin
                                state <=  `OR1200_QMEMFSM_IDLE;
                                qmem_dack <=  1'b0;
                                qmem_iack <=  1'b0;
                        end
                end
                `OR1200_QMEMFSM_LOAD: begin
                        if (qmemdmmu_cycstb_i & daddr_qmem_hit & qmemdcpu_we_i & qmem_ack) begin
                                state <=  `OR1200_QMEMFSM_STORE;
                                qmem_dack <=  1'b1;
                                qmem_iack <=  1'b0;
                        end
                        else if (qmemdmmu_cycstb_i & daddr_qmem_hit & qmem_ack) begin
                                state <=  `OR1200_QMEMFSM_LOAD;
                                qmem_dack <=  1'b1;
                                qmem_iack <=  1'b0;
                        end
                        else if (qmemimmu_cycstb_i & iaddr_qmem_hit & qmem_ack) begin
                                state <=  `OR1200_QMEMFSM_FETCH;
                                qmem_iack <=  1'b1;
                                qmem_dack <=  1'b0;
                        end
                        else begin
                                state <=  `OR1200_QMEMFSM_IDLE;
                                qmem_dack <=  1'b0;
                                qmem_iack <=  1'b0;
                        end
                end
                `OR1200_QMEMFSM_FETCH: begin
                        if (qmemdmmu_cycstb_i & daddr_qmem_hit & qmemdcpu_we_i & qmem_ack) begin
                                state <=  `OR1200_QMEMFSM_STORE;
                                qmem_dack <=  1'b1;
                                qmem_iack <=  1'b0;
                        end
                        else if (qmemdmmu_cycstb_i & daddr_qmem_hit & qmem_ack) begin
                                state <=  `OR1200_QMEMFSM_LOAD;
                                qmem_dack <=  1'b1;
                                qmem_iack <=  1'b0;
                        end
                        else if (qmemimmu_cycstb_i & iaddr_qmem_hit & qmem_ack) begin
                                state <=  `OR1200_QMEMFSM_FETCH;
                                qmem_iack <=  1'b1;
                                qmem_dack <=  1'b0;
                        end
                        else begin
                                state <=  `OR1200_QMEMFSM_IDLE;
                                qmem_dack <=  1'b0;
                                qmem_iack <=  1'b0;
                        end
                end
                default: begin
                        state <=  `OR1200_QMEMFSM_IDLE;
                        qmem_dack <=  1'b0;
                        qmem_iack <=  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

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	141	marcus.erl	`// $Log: or1200_qmem_top.v,v $`
50			`// Revision 2.0 2010/06/30 11:00:00 ORSoC`
51			`// Minor update:`
52			`// Coding style changed.`
53			`//`
54			`// Revision 1.3 2004/06/08 18:17:36 lampret`
55			`// Non-functional changes. Coding style fixes.`
56			`//`
57	10	unneback	`// Revision 1.2 2004/04/05 08:40:26 lampret`
58			`// Merged branch_qmem into main tree.`
59			`//`
60			`// Revision 1.1.2.4 2004/01/11 22:45:46 andreje`
61			`// Separate instruction and data QMEM decoders, QMEM acknowledge and byte-select added`
62			`//`
63			`// Revision 1.1.2.3 2003/12/17 13:36:58 simons`
64			`// Qmem mbist signals fixed.`
65			`//`
66			`// Revision 1.1.2.2 2003/12/09 11:46:48 simons`
67			`// Mbist nameing changed, Artisan ram instance signal names fixed, some synthesis waning fixed.`
68			`//`
69			`// Revision 1.1.2.1 2003/07/08 15:45:26 lampret`
70			`// Added embedded memory QMEM.`
71			`//`
72			`//`
73
74			`// synopsys translate_off`
75			`include "timescale.v"
76			`// synopsys translate_on`
77			`include "or1200_defines.v"
78
79			`define OR1200_QMEMFSM_IDLE 3'd0
80			`define OR1200_QMEMFSM_STORE 3'd1
81			`define OR1200_QMEMFSM_LOAD 3'd2
82			`define OR1200_QMEMFSM_FETCH 3'd3
83
84			`//`
85			`// Embedded memory`
86			`//`
87			`module or1200_qmem_top(`
88			`// Rst, clk and clock control`
89			`clk, rst,`
90
91			`ifdef OR1200_BIST
92			`// RAM BIST`
93			`mbist_si_i, mbist_so_o, mbist_ctrl_i,`
94			`endif
95
96			`// QMEM and CPU/IMMU`
97			`qmemimmu_adr_i,`
98			`qmemimmu_cycstb_i,`
99			`qmemimmu_ci_i,`
100	141	marcus.erl	`qmemicpu_sel_i,`
101			`qmemicpu_tag_i,`
102	10	unneback	`qmemicpu_dat_o,`
103			`qmemicpu_ack_o,`
104			`qmemimmu_rty_o,`
105			`qmemimmu_err_o,`
106			`qmemimmu_tag_o,`
107
108			`// QMEM and IC`
109			`icqmem_adr_o,`
110			`icqmem_cycstb_o,`
111	141	marcus.erl	`icqmem_ci_o,`
112	10	unneback	`icqmem_sel_o,`
113			`icqmem_tag_o,`
114			`icqmem_dat_i,`
115			`icqmem_ack_i,`
116			`icqmem_rty_i,`
117			`icqmem_err_i,`
118			`icqmem_tag_i,`
119
120			`// QMEM and CPU/DMMU`
121			`qmemdmmu_adr_i,`
122			`qmemdmmu_cycstb_i,`
123			`qmemdmmu_ci_i,`
124	141	marcus.erl	`qmemdcpu_we_i,`
125			`qmemdcpu_sel_i,`
126			`qmemdcpu_tag_i,`
127			`qmemdcpu_dat_i,`
128	10	unneback	`qmemdcpu_dat_o,`
129			`qmemdcpu_ack_o,`
130			`qmemdcpu_rty_o,`
131			`qmemdmmu_err_o,`
132			`qmemdmmu_tag_o,`
133
134			`// QMEM and DC`
135	141	marcus.erl	`dcqmem_adr_o,`
136			`dcqmem_cycstb_o,`
137			`dcqmem_ci_o,`
138			`dcqmem_we_o,`
139			`dcqmem_sel_o,`
140			`dcqmem_tag_o,`
141			`dcqmem_dat_o,`
142			`dcqmem_dat_i,`
143			`dcqmem_ack_i,`
144			`dcqmem_rty_i,`
145			`dcqmem_err_i,`
146			`dcqmem_tag_i`
147	10	unneback
148			`);`
149
150			parameter dw = `OR1200_OPERAND_WIDTH;
151
152			`//`
153			`// I/O`
154			`//`
155
156			`//`
157			`// Clock and reset`
158			`//`
159			`input clk;`
160			`input rst;`
161
162			`ifdef OR1200_BIST
163			`//`
164			`// RAM BIST`
165			`//`
166			`input mbist_si_i;`
167			input [`OR1200_MBIST_CTRL_WIDTH - 1:0] mbist_ctrl_i;
168			`output mbist_so_o;`
169			`endif
170
171			`//`
172			`// QMEM and CPU/IMMU`
173			`//`
174			`input [31:0] qmemimmu_adr_i;`
175			`input qmemimmu_cycstb_i;`
176			`input qmemimmu_ci_i;`
177	141	marcus.erl	`input [3:0] qmemicpu_sel_i;`
178			`input [3:0] qmemicpu_tag_i;`
179	10	unneback	`output [31:0] qmemicpu_dat_o;`
180			`output qmemicpu_ack_o;`
181			`output qmemimmu_rty_o;`
182			`output qmemimmu_err_o;`
183			`output [3:0] qmemimmu_tag_o;`
184
185			`//`
186			`// QMEM and IC`
187			`//`
188			`output [31:0] icqmem_adr_o;`
189			`output icqmem_cycstb_o;`
190			`output icqmem_ci_o;`
191			`output [3:0] icqmem_sel_o;`
192			`output [3:0] icqmem_tag_o;`
193			`input [31:0] icqmem_dat_i;`
194			`input icqmem_ack_i;`
195			`input icqmem_rty_i;`
196			`input icqmem_err_i;`
197			`input [3:0] icqmem_tag_i;`
198
199			`//`
200			`// QMEM and CPU/DMMU`
201			`//`
202			`input [31:0] qmemdmmu_adr_i;`
203			`input qmemdmmu_cycstb_i;`
204			`input qmemdmmu_ci_i;`
205			`input qmemdcpu_we_i;`
206	141	marcus.erl	`input [3:0] qmemdcpu_sel_i;`
207			`input [3:0] qmemdcpu_tag_i;`
208			`input [31:0] qmemdcpu_dat_i;`
209	10	unneback	`output [31:0] qmemdcpu_dat_o;`
210			`output qmemdcpu_ack_o;`
211			`output qmemdcpu_rty_o;`
212			`output qmemdmmu_err_o;`
213			`output [3:0] qmemdmmu_tag_o;`
214
215			`//`
216			`// QMEM and DC`
217			`//`
218			`output [31:0] dcqmem_adr_o;`
219			`output dcqmem_cycstb_o;`
220			`output dcqmem_ci_o;`
221			`output dcqmem_we_o;`
222			`output [3:0] dcqmem_sel_o;`
223			`output [3:0] dcqmem_tag_o;`
224			`output [dw-1:0] dcqmem_dat_o;`
225			`input [dw-1:0] dcqmem_dat_i;`
226			`input dcqmem_ack_i;`
227			`input dcqmem_rty_i;`
228			`input dcqmem_err_i;`
229			`input [3:0] dcqmem_tag_i;`
230
231			`ifdef OR1200_QMEM_IMPLEMENTED
232
233			`//`
234			`// Internal regs and wires`
235			`//`
236			`wire iaddr_qmem_hit;`
237			`wire daddr_qmem_hit;`
238			`reg [2:0] state;`
239			`reg qmem_dack;`
240			`reg qmem_iack;`
241			`wire [31:0] qmem_di;`
242			`wire [31:0] qmem_do;`
243			`wire qmem_en;`
244			`wire qmem_we;`
245			`ifdef OR1200_QMEM_BSEL
246			`wire [3:0] qmem_sel;`
247			`endif
248			`wire [31:0] qmem_addr;`
249			`ifdef OR1200_QMEM_ACK
250			`wire qmem_ack;`
251			`else
252			`wire qmem_ack = 1'b1;`
253			`endif
254
255			`//`
256			`// QMEM and CPU/IMMU`
257			`//`
258			`assign qmemicpu_dat_o = qmem_iack ? qmem_do : icqmem_dat_i;`
259			`assign qmemicpu_ack_o = qmem_iack ? 1'b1 : icqmem_ack_i;`
260			`assign qmemimmu_rty_o = qmem_iack ? 1'b0 : icqmem_rty_i;`
261			`assign qmemimmu_err_o = qmem_iack ? 1'b0 : icqmem_err_i;`
262			`assign qmemimmu_tag_o = qmem_iack ? 4'h0 : icqmem_tag_i;`
263
264			`//`
265			`// QMEM and IC`
266			`//`
267			`assign icqmem_adr_o = iaddr_qmem_hit ? 32'h0000_0000 : qmemimmu_adr_i;`
268			`assign icqmem_cycstb_o = iaddr_qmem_hit ? 1'b0 : qmemimmu_cycstb_i;`
269			`assign icqmem_ci_o = iaddr_qmem_hit ? 1'b0 : qmemimmu_ci_i;`
270			`assign icqmem_sel_o = iaddr_qmem_hit ? 4'h0 : qmemicpu_sel_i;`
271			`assign icqmem_tag_o = iaddr_qmem_hit ? 4'h0 : qmemicpu_tag_i;`
272
273			`//`
274			`// QMEM and CPU/DMMU`
275			`//`
276			`assign qmemdcpu_dat_o = daddr_qmem_hit ? qmem_do : dcqmem_dat_i;`
277			`assign qmemdcpu_ack_o = daddr_qmem_hit ? qmem_dack : dcqmem_ack_i;`
278			`assign qmemdcpu_rty_o = daddr_qmem_hit ? ~qmem_dack : dcqmem_rty_i;`
279			`assign qmemdmmu_err_o = daddr_qmem_hit ? 1'b0 : dcqmem_err_i;`
280			`assign qmemdmmu_tag_o = daddr_qmem_hit ? 4'h0 : dcqmem_tag_i;`
281
282			`//`
283			`// QMEM and DC`
284			`//`
285			`assign dcqmem_adr_o = daddr_qmem_hit ? 32'h0000_0000 : qmemdmmu_adr_i;`
286			`assign dcqmem_cycstb_o = daddr_qmem_hit ? 1'b0 : qmemdmmu_cycstb_i;`
287			`assign dcqmem_ci_o = daddr_qmem_hit ? 1'b0 : qmemdmmu_ci_i;`
288			`assign dcqmem_we_o = daddr_qmem_hit ? 1'b0 : qmemdcpu_we_i;`
289			`assign dcqmem_sel_o = daddr_qmem_hit ? 4'h0 : qmemdcpu_sel_i;`
290			`assign dcqmem_tag_o = daddr_qmem_hit ? 4'h0 : qmemdcpu_tag_i;`
291			`assign dcqmem_dat_o = daddr_qmem_hit ? 32'h0000_0000 : qmemdcpu_dat_i;`
292
293			`//`
294			`// Address comparison whether QMEM was hit`
295			`//`
296			`ifdef OR1200_QMEM_IADDR
297			assign iaddr_qmem_hit = (qmemimmu_adr_i & `OR1200_QMEM_IMASK) == `OR1200_QMEM_IADDR;
298			`else
299			`assign iaddr_qmem_hit = 1'b0;`
300			`endif
301
302			`ifdef OR1200_QMEM_DADDR
303			assign daddr_qmem_hit = (qmemdmmu_adr_i & `OR1200_QMEM_DMASK) == `OR1200_QMEM_DADDR;
304			`else
305			`assign daddr_qmem_hit = 1'b0;`
306			`endif
307
308			`//`
309			`//`
310			`//`
311			`assign qmem_en = iaddr_qmem_hit & qmemimmu_cycstb_i \| daddr_qmem_hit & qmemdmmu_cycstb_i;`
312			`assign qmem_we = qmemdmmu_cycstb_i & daddr_qmem_hit & qmemdcpu_we_i;`
313			`ifdef OR1200_QMEM_BSEL
314			`assign qmem_sel = (qmemdmmu_cycstb_i & daddr_qmem_hit) ? qmemdcpu_sel_i : qmemicpu_sel_i;`
315			`endif
316			`assign qmem_di = qmemdcpu_dat_i;`
317			`assign qmem_addr = (qmemdmmu_cycstb_i & daddr_qmem_hit) ? qmemdmmu_adr_i : qmemimmu_adr_i;`
318
319			`//`
320			`// QMEM control FSM`
321			`//`
322			`always @(posedge rst or posedge clk)`
323			`if (rst) begin`
324	258	julius	state <= `OR1200_QMEMFSM_IDLE;
325			`qmem_dack <= 1'b0;`
326			`qmem_iack <= 1'b0;`
327	10	unneback	`end`
328			`else case (state) // synopsys parallel_case`
329			`OR1200_QMEMFSM_IDLE: begin
330			`if (qmemdmmu_cycstb_i & daddr_qmem_hit & qmemdcpu_we_i & qmem_ack) begin`
331	258	julius	state <= `OR1200_QMEMFSM_STORE;
332			`qmem_dack <= 1'b1;`
333			`qmem_iack <= 1'b0;`
334	10	unneback	`end`
335			`else if (qmemdmmu_cycstb_i & daddr_qmem_hit & qmem_ack) begin`
336	258	julius	state <= `OR1200_QMEMFSM_LOAD;
337			`qmem_dack <= 1'b1;`
338			`qmem_iack <= 1'b0;`
339	10	unneback	`end`
340			`else if (qmemimmu_cycstb_i & iaddr_qmem_hit & qmem_ack) begin`
341	258	julius	state <= `OR1200_QMEMFSM_FETCH;
342			`qmem_iack <= 1'b1;`
343			`qmem_dack <= 1'b0;`
344	10	unneback	`end`
345			`end`
346			`OR1200_QMEMFSM_STORE: begin
347			`if (qmemdmmu_cycstb_i & daddr_qmem_hit & qmemdcpu_we_i & qmem_ack) begin`
348	258	julius	state <= `OR1200_QMEMFSM_STORE;
349			`qmem_dack <= 1'b1;`
350			`qmem_iack <= 1'b0;`
351	10	unneback	`end`
352			`else if (qmemdmmu_cycstb_i & daddr_qmem_hit & qmem_ack) begin`
353	258	julius	state <= `OR1200_QMEMFSM_LOAD;
354			`qmem_dack <= 1'b1;`
355			`qmem_iack <= 1'b0;`
356	10	unneback	`end`
357			`else if (qmemimmu_cycstb_i & iaddr_qmem_hit & qmem_ack) begin`
358	258	julius	state <= `OR1200_QMEMFSM_FETCH;
359			`qmem_iack <= 1'b1;`
360			`qmem_dack <= 1'b0;`
361	10	unneback	`end`
362			`else begin`
363	258	julius	state <= `OR1200_QMEMFSM_IDLE;
364			`qmem_dack <= 1'b0;`
365			`qmem_iack <= 1'b0;`
366	10	unneback	`end`
367			`end`
368			`OR1200_QMEMFSM_LOAD: begin
369			`if (qmemdmmu_cycstb_i & daddr_qmem_hit & qmemdcpu_we_i & qmem_ack) begin`
370	258	julius	state <= `OR1200_QMEMFSM_STORE;
371			`qmem_dack <= 1'b1;`
372			`qmem_iack <= 1'b0;`
373	10	unneback	`end`
374			`else if (qmemdmmu_cycstb_i & daddr_qmem_hit & qmem_ack) begin`
375	258	julius	state <= `OR1200_QMEMFSM_LOAD;
376			`qmem_dack <= 1'b1;`
377			`qmem_iack <= 1'b0;`
378	10	unneback	`end`
379			`else if (qmemimmu_cycstb_i & iaddr_qmem_hit & qmem_ack) begin`
380	258	julius	state <= `OR1200_QMEMFSM_FETCH;
381			`qmem_iack <= 1'b1;`
382			`qmem_dack <= 1'b0;`
383	10	unneback	`end`
384			`else begin`
385	258	julius	state <= `OR1200_QMEMFSM_IDLE;
386			`qmem_dack <= 1'b0;`
387			`qmem_iack <= 1'b0;`
388	10	unneback	`end`
389			`end`
390			`OR1200_QMEMFSM_FETCH: begin
391			`if (qmemdmmu_cycstb_i & daddr_qmem_hit & qmemdcpu_we_i & qmem_ack) begin`
392	258	julius	state <= `OR1200_QMEMFSM_STORE;
393			`qmem_dack <= 1'b1;`
394			`qmem_iack <= 1'b0;`
395	10	unneback	`end`
396			`else if (qmemdmmu_cycstb_i & daddr_qmem_hit & qmem_ack) begin`
397	258	julius	state <= `OR1200_QMEMFSM_LOAD;
398			`qmem_dack <= 1'b1;`
399			`qmem_iack <= 1'b0;`
400	10	unneback	`end`
401			`else if (qmemimmu_cycstb_i & iaddr_qmem_hit & qmem_ack) begin`
402	258	julius	state <= `OR1200_QMEMFSM_FETCH;
403			`qmem_iack <= 1'b1;`
404			`qmem_dack <= 1'b0;`
405	10	unneback	`end`
406			`else begin`
407	258	julius	state <= `OR1200_QMEMFSM_IDLE;
408			`qmem_dack <= 1'b0;`
409			`qmem_iack <= 1'b0;`
410	10	unneback	`end`
411			`end`
412			`default: begin`
413	258	julius	state <= `OR1200_QMEMFSM_IDLE;
414			`qmem_dack <= 1'b0;`
415			`qmem_iack <= 1'b0;`
416	10	unneback	`end`
417			`endcase`
418
419			`//`
420			`// Instantiation of embedded memory`
421			`//`
422			`or1200_spram_2048x32 or1200_qmem_ram(`
423			`.clk(clk),`
424			`.rst(rst),`
425			`ifdef OR1200_BIST
426			`// RAM BIST`
427			`.mbist_si_i(mbist_si_i),`
428			`.mbist_so_o(mbist_so_o),`
429			`.mbist_ctrl_i(mbist_ctrl_i),`
430			`endif
431			`.addr(qmem_addr[12:2]),`
432			`ifdef OR1200_QMEM_BSEL
433			`.sel(qmem_sel),`
434			`endif
435			`ifdef OR1200_QMEM_ACK
436			`.ack(qmem_ack),`
437			`endif
438			`.ce(qmem_en),`
439			`.we(qmem_we),`
440			`.oe(1'b1),`
441			`.di(qmem_di),`
442			`.doq(qmem_do)`
443			`);`
444
445			`else // OR1200_QMEM_IMPLEMENTED
446
447			`//`
448			`// QMEM and CPU/IMMU`
449			`//`
450			`assign qmemicpu_dat_o = icqmem_dat_i;`
451			`assign qmemicpu_ack_o = icqmem_ack_i;`
452			`assign qmemimmu_rty_o = icqmem_rty_i;`
453			`assign qmemimmu_err_o = icqmem_err_i;`
454			`assign qmemimmu_tag_o = icqmem_tag_i;`
455
456			`//`
457			`// QMEM and IC`
458			`//`
459			`assign icqmem_adr_o = qmemimmu_adr_i;`
460			`assign icqmem_cycstb_o = qmemimmu_cycstb_i;`
461			`assign icqmem_ci_o = qmemimmu_ci_i;`
462			`assign icqmem_sel_o = qmemicpu_sel_i;`
463			`assign icqmem_tag_o = qmemicpu_tag_i;`
464
465			`//`
466			`// QMEM and CPU/DMMU`
467			`//`
468			`assign qmemdcpu_dat_o = dcqmem_dat_i;`
469			`assign qmemdcpu_ack_o = dcqmem_ack_i;`
470			`assign qmemdcpu_rty_o = dcqmem_rty_i;`
471			`assign qmemdmmu_err_o = dcqmem_err_i;`
472			`assign qmemdmmu_tag_o = dcqmem_tag_i;`
473
474			`//`
475			`// QMEM and DC`
476			`//`
477			`assign dcqmem_adr_o = qmemdmmu_adr_i;`
478			`assign dcqmem_cycstb_o = qmemdmmu_cycstb_i;`
479			`assign dcqmem_ci_o = qmemdmmu_ci_i;`
480			`assign dcqmem_we_o = qmemdcpu_we_i;`
481			`assign dcqmem_sel_o = qmemdcpu_sel_i;`
482			`assign dcqmem_tag_o = qmemdcpu_tag_i;`
483			`assign dcqmem_dat_o = qmemdcpu_dat_i;`
484
485			`ifdef OR1200_BIST
486			`assign mbist_so_o = mbist_si_i;`
487			`endif
488
489			`endif
490
491			`endmodule`

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