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1 | // ========== Copyright Header Begin ========================================== |
2 | // | |
3 | // OpenSPARC T2 Processor File: niu_pio_imask1_decoder.v | |
4 | // Copyright (C) 1995-2007 Sun Microsystems, Inc. All Rights Reserved | |
5 | // 4150 Network Circle, Santa Clara, California 95054, U.S.A. | |
6 | // | |
7 | // * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
8 | // | |
9 | // This program is free software; you can redistribute it and/or modify | |
10 | // it under the terms of the GNU General Public License as published by | |
11 | // the Free Software Foundation; version 2 of the License. | |
12 | // | |
13 | // This program is distributed in the hope that it will be useful, | |
14 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | // GNU General Public License for more details. | |
17 | // | |
18 | // You should have received a copy of the GNU General Public License | |
19 | // along with this program; if not, write to the Free Software | |
20 | // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
21 | // | |
22 | // For the avoidance of doubt, and except that if any non-GPL license | |
23 | // choice is available it will apply instead, Sun elects to use only | |
24 | // the General Public License version 2 (GPLv2) at this time for any | |
25 | // software where a choice of GPL license versions is made | |
26 | // available with the language indicating that GPLv2 or any later version | |
27 | // may be used, or where a choice of which version of the GPL is applied is | |
28 | // otherwise unspecified. | |
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30 | // Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
31 | // CA 95054 USA or visit www.sun.com if you need additional information or | |
32 | // have any questions. | |
33 | // | |
34 | // ========== Copyright Header End ============================================ | |
35 | /*%W% %G%*/ | |
36 | ||
37 | /***************************************************************** | |
38 | * | |
39 | * File Name : niu_pio_imask1_decoder.v | |
40 | * Author Name : John Lo | |
41 | * Description : It contains ldf_mask 64~68 read/write decoder, | |
42 | * | |
43 | * Parent Module: niu_pio_imask1_decoder.v | |
44 | * Child Module: | |
45 | * Interface Mod: many. | |
46 | * Date Created : 3/30/04 | |
47 | * | |
48 | * Copyright (c) 2020, Sun Microsystems, Inc. | |
49 | * Sun Proprietary and Confidential | |
50 | * | |
51 | * Modification : | |
52 | * | |
53 | ****************************************************************/ | |
54 | ||
55 | module niu_pio_imask1_decoder (/*AUTOARG*/ | |
56 | // Outputs | |
57 | imask1_ack, imask1_rdata, imask1_err, ld_ldf_mask64, | |
58 | ld_ldf_mask65, ld_ldf_mask66, ld_ldf_mask67, ld_ldf_mask68, | |
59 | // Inputs | |
60 | clk, reset, imask1_sel_reg, addr, rd, ldf_mask64, | |
61 | ldf_mask65, ldf_mask66, ldf_mask67, ldf_mask68 | |
62 | ); | |
63 | input clk; | |
64 | input reset; | |
65 | input imask1_sel_reg; | |
66 | // pio broadcast signals | |
67 | input [18:0] addr; | |
68 | input rd; | |
69 | input [1:0] ldf_mask64; | |
70 | input [1:0] ldf_mask65; | |
71 | input [1:0] ldf_mask66; | |
72 | input [1:0] ldf_mask67; | |
73 | input [1:0] ldf_mask68; | |
74 | ||
75 | output imask1_ack; | |
76 | output [63:0] imask1_rdata; | |
77 | output imask1_err; | |
78 | ||
79 | output ld_ldf_mask64; | |
80 | output ld_ldf_mask65; | |
81 | output ld_ldf_mask66; | |
82 | output ld_ldf_mask67; | |
83 | output ld_ldf_mask68; | |
84 | ||
85 | // common reg declaration | |
86 | reg [63:0] rd_data; | |
87 | reg non_qualified_addr_err; | |
88 | // common wrie declaration | |
89 | wire [63:0] imask1_rdata; | |
90 | wire rd_en; | |
91 | wire wr_en; | |
92 | wire rasr; | |
93 | // output reg declaration | |
94 | reg ld_ldf_mask64; | |
95 | reg ld_ldf_mask65; | |
96 | reg ld_ldf_mask66; | |
97 | reg ld_ldf_mask67; | |
98 | reg ld_ldf_mask68; | |
99 | ||
100 | `ifdef NEPTUNE | |
101 | /* ---------------------------------------------------------- */ | |
102 | reg imask1_sel_reg_int; | |
103 | reg rd_int; | |
104 | reg [18:0] addr_int; | |
105 | ||
106 | always @(posedge clk) | |
107 | if (reset) | |
108 | begin | |
109 | imask1_sel_reg_int <= 1'b0; | |
110 | rd_int <= 1'b0; | |
111 | addr_int <= 19'b0; | |
112 | end | |
113 | else | |
114 | begin | |
115 | imask1_sel_reg_int <= imask1_sel_reg ; | |
116 | rd_int <= rd ; | |
117 | addr_int <= addr; | |
118 | end | |
119 | ||
120 | `else | |
121 | /* ---------------------------------------------------------- */ | |
122 | ||
123 | wire imask1_sel_reg_int; | |
124 | wire rd_int; | |
125 | wire [18:0] addr_int; | |
126 | ||
127 | assign imask1_sel_reg_int = imask1_sel_reg ; | |
128 | assign rd_int = rd ; | |
129 | assign addr_int = addr ; | |
130 | /* ----------------------------------------------------------- */ | |
131 | `endif | |
132 | ||
133 | ||
134 | ||
135 | niu_rw_ctl imask1_rw_ctl( | |
136 | // Outputs | |
137 | .wr_en (wr_en), | |
138 | .rd_en (rd_en), | |
139 | .ack (imask1_ack), | |
140 | .rdata (imask1_rdata[63:0]), | |
141 | .err (imask1_err), | |
142 | .rasr (rasr), | |
143 | // Inputs | |
144 | .clk (clk), | |
145 | .sel (imask1_sel_reg_int), | |
146 | .rd (rd_int), | |
147 | .rd_data (rd_data[63:0]), | |
148 | .non_qualified_addr_err(non_qualified_addr_err)); | |
149 | ||
150 | ||
151 | always @ (/*AUTOSENSE*/addr_int or ldf_mask64 or ldf_mask65 or ldf_mask66 | |
152 | or ldf_mask67 or ldf_mask68 or wr_en) | |
153 | begin | |
154 | non_qualified_addr_err = 0; | |
155 | rd_data = 64'hdead_beef_dead_beef; | |
156 | ||
157 | ld_ldf_mask64 = 0; | |
158 | ld_ldf_mask65 = 0; | |
159 | ld_ldf_mask66 = 0; | |
160 | ld_ldf_mask67 = 0; | |
161 | ld_ldf_mask68 = 0; | |
162 | ||
163 | case({addr_int[18:3],3'b0}) //synopsys parallel_case full_case | |
164 | 19'h0_0000: begin | |
165 | ld_ldf_mask64 = wr_en; | |
166 | rd_data = {62'b0,ldf_mask64}; | |
167 | end | |
168 | 19'h0_2000: begin | |
169 | ld_ldf_mask65 = wr_en; | |
170 | rd_data = {62'b0,ldf_mask65}; | |
171 | end | |
172 | 19'h0_4000: begin | |
173 | ld_ldf_mask66 = wr_en; | |
174 | rd_data = {62'b0,ldf_mask66}; | |
175 | end | |
176 | 19'h0_6000: begin | |
177 | ld_ldf_mask67 = wr_en; | |
178 | rd_data = {62'b0,ldf_mask67}; | |
179 | end | |
180 | 19'h0_8000: begin | |
181 | ld_ldf_mask68 = wr_en; | |
182 | rd_data = {62'b0,ldf_mask68}; | |
183 | end | |
184 | ||
185 | default: begin | |
186 | rd_data = 64'hdead_beef_dead_beef; | |
187 | non_qualified_addr_err = 1; | |
188 | end // case: default | |
189 | endcase // case({addr[18:3],3'b0}) | |
190 | end // always @ (... | |
191 | ||
192 | ||
193 | ||
194 | ||
195 | endmodule // niu_pio_imask1_decoder | |
196 | ||
197 |