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1 | ////////////////////////////////////////////////////////////////////// |
2 | //// //// |
3 | //// File name "mas_ch_state_crit.v" //// |
4 | //// //// |
5 | //// This file is part of the "PCI bridge" project //// |
6 | //// http://www.opencores.org/cores/pci/ //// |
7 | //// //// |
8 | //// Author(s): //// |
9 | //// - Miha Dolenc (mihad@opencores.org) //// |
10 | //// //// |
11 | //// All additional information is avaliable in the README //// |
12 | //// file. //// |
13 | //// //// |
14 | //// //// |
15 | ////////////////////////////////////////////////////////////////////// |
16 | //// //// |
17 | //// Copyright (C) 2001 Miha Dolenc, mihad@opencores.org //// |
18 | //// //// |
19 | //// This source file may be used and distributed without //// |
20 | //// restriction provided that this copyright statement is not //// |
21 | //// removed from the file and that any derivative work contains //// |
22 | //// the original copyright notice and the associated disclaimer. //// |
23 | //// //// |
24 | //// This source file is free software; you can redistribute it //// |
25 | //// and/or modify it under the terms of the GNU Lesser General //// |
26 | //// Public License as published by the Free Software Foundation; //// |
27 | //// either version 2.1 of the License, or (at your option) any //// |
28 | //// later version. //// |
29 | //// //// |
30 | //// This source is distributed in the hope that it will be //// |
31 | //// useful, but WITHOUT ANY WARRANTY; without even the implied //// |
32 | //// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR //// |
33 | //// PURPOSE. See the GNU Lesser General Public License for more //// |
34 | //// details. //// |
35 | //// //// |
36 | //// You should have received a copy of the GNU Lesser General //// |
37 | //// Public License along with this source; if not, download it //// |
38 | //// from http://www.opencores.org/lgpl.shtml //// |
39 | //// //// |
40 | ////////////////////////////////////////////////////////////////////// |
41 | // |
42 | // CVS Revision History |
43 | // |
44 | // $Log: pci_mas_ch_state_crit.v,v $ |
45 | // Revision 1.1 2007-03-20 17:50:56 sithglan |
46 | // add shit |
47 | // |
48 | // Revision 1.1 2003/01/27 16:49:31 mihad |
49 | // Changed module and file names. Updated scripts accordingly. FIFO synchronizations changed. |
50 | // |
51 | // Revision 1.3 2002/02/01 15:25:12 mihad |
52 | // Repaired a few bugs, updated specification, added test bench files and design document |
53 | // |
54 | // Revision 1.2 2001/10/05 08:14:28 mihad |
55 | // Updated all files with inclusion of timescale file for simulation purposes. |
56 | // |
57 | // Revision 1.1.1.1 2001/10/02 15:33:46 mihad |
58 | // New project directory structure |
59 | // |
60 | // |
61 | |
62 | // module is used to separate logic which uses criticaly constrained inputs from slower logic. |
63 | // It is used to synthesize critical timing logic separately with faster cells or without optimization |
64 | |
65 | // Module is used in master state machine for state machine clock enable driving |
66 | |
67 | // synopsys translate_off |
68 | `include "timescale.v" |
69 | // synopsys translate_on |
70 | |
71 | module pci_mas_ch_state_crit |
72 | ( |
73 | change_state_out, |
74 | ch_state_med_in, |
75 | sm_data_phases_in, |
76 | pci_trdy_in, |
77 | pci_stop_in |
78 | ) ; |
79 | |
80 | output change_state_out ; |
81 | input ch_state_med_in, |
82 | sm_data_phases_in, |
83 | pci_trdy_in, |
84 | pci_stop_in ; |
85 | |
86 | assign change_state_out = ch_state_med_in || sm_data_phases_in && (~(pci_trdy_in && pci_stop_in)) ; |
87 | |
88 | endmodule |