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1 | // ========== Copyright Header Begin ========================================== |
2 | // | |
3 | // OpenSPARC T2 Processor File: niu_pio_debug.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. | |
29 | // | |
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 | /********************************************************************* | |
36 | * | |
37 | * niu_pio_debug..v | |
38 | * | |
39 | * NIU TDMC Top Level Debug Module | |
40 | * | |
41 | * Orignal Author(s): Maya Suresh | |
42 | * Modifier(s): | |
43 | * Project(s): Neptune/Niagara 2 | |
44 | * | |
45 | * Copyright (c) 2004 Sun Microsystems, Inc. | |
46 | * | |
47 | * All Rights Reserved. | |
48 | * | |
49 | * This verilog model is the confidential and proprietary property of | |
50 | * Sun Microsystems, Inc., and the possession or use of this model | |
51 | * requires a written license from Sun Microsystems, Inc. | |
52 | * | |
53 | **********************************************************************/ | |
54 | ||
55 | module niu_pio_debug( | |
56 | SysClk, | |
57 | Reset_L, | |
58 | TrainingVector, | |
59 | pio_debug_port, | |
60 | rd_ptr, | |
61 | wr_ptr, | |
62 | pio_rw_state, | |
63 | accepted_state, | |
64 | ig_state, | |
65 | debug_select | |
66 | ); | |
67 | ||
68 | // Global Signals | |
69 | input SysClk; | |
70 | input Reset_L; | |
71 | input [4:0] rd_ptr ; | |
72 | input [4:0] wr_ptr ; | |
73 | input [2:0] pio_rw_state ; | |
74 | input [1:0] accepted_state ; | |
75 | input [2:0] ig_state ; | |
76 | ||
77 | // To Debug Module | |
78 | output [31:0] pio_debug_port; | |
79 | ||
80 | reg [31:0] pio_debug_port; | |
81 | ||
82 | // From Control Regs | |
83 | input [5:0] debug_select ; | |
84 | input [31:0] TrainingVector ; | |
85 | ||
86 | /*--------------------------------------------------------------*/ | |
87 | // Debug Block | |
88 | /*--------------------------------------------------------------*/ | |
89 | ||
90 | always @(posedge SysClk) | |
91 | if (!Reset_L) pio_debug_port <= 32'h0; | |
92 | else | |
93 | case(debug_select) | |
94 | 6'h0: pio_debug_port <= {22'b0,rd_ptr[4:0],wr_ptr[4:0]}; | |
95 | 6'h1: pio_debug_port <= {24'b0,ig_state[2:0],pio_rw_state[2:0],accepted_state[1:0]}; | |
96 | 6'h2: pio_debug_port <= ~pio_debug_port; | |
97 | 6'h3: pio_debug_port <= TrainingVector; | |
98 | ||
99 | default: pio_debug_port <= 32'h0; | |
100 | ||
101 | endcase | |
102 | ||
103 | endmodule |