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1 | ////////////////////////////////////////////////////////////////////// |
| 2 | //// //// |
| 3 | //// File name "pci_io_mux_ad_en_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_io_mux_ad_en_crit.v,v $ |
| 45 | // Revision 1.1 2007-03-20 17:50:56 sithglan |
| 46 | // add shit |
| 47 | // |
| 48 | // Revision 1.2 2003/01/27 16:49:31 mihad |
| 49 | // Changed module and file names. Updated scripts accordingly. FIFO synchronizations changed. |
| 50 | // |
| 51 | // Revision 1.1 2002/02/01 14:43:31 mihad |
| 52 | // *** empty log message *** |
| 53 | // |
| 54 | // |
| 55 | |
| 56 | // module provides equation for ad output enables, which uses critical pci bus inputs |
| 57 | |
| 58 | // synopsys translate_off |
| 59 | `include "timescale.v" |
| 60 | // synopsys translate_on |
| 61 | |
| 62 | // module is provided for ad bus output enable Flip-Flops values |
| 63 | module pci_io_mux_ad_en_crit |
| 64 | ( |
| 65 | ad_en_in, |
| 66 | pci_frame_in, |
| 67 | pci_trdy_in, |
| 68 | pci_stop_in, |
| 69 | ad_en_out |
| 70 | ); |
| 71 | input ad_en_in, |
| 72 | pci_frame_in, |
| 73 | pci_trdy_in, |
| 74 | pci_stop_in ; |
| 75 | output ad_en_out ; |
| 76 | |
| 77 | assign ad_en_out = ad_en_in && ( ~pci_frame_in || (pci_trdy_in && pci_stop_in) ) ; |
| 78 | endmodule |
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