projects / OpenSPARC-T2-DV / blame
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1 | // ========== Copyright Header Begin ========================================== |
| 2 | // | |
| 3 | // OpenSPARC T2 Processor File: niu_ipp_pkt_dsc.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 | ||
| 38 | Project : Niu | |
| 39 | ||
| 40 | File name : niu_ipp_pkt_dsc.v | |
| 41 | ||
| 42 | Module(s) name : niu_ipp_pkt_dsc | |
| 43 | ||
| 44 | Parent modules : niu_ipp.v | |
| 45 | ||
| 46 | Child modules : | |
| 47 | ||
| 48 | Author's name : George Chu | |
| 49 | ||
| 50 | Date : January 2004 | |
| 51 | ||
| 52 | Description : This file lists packet discard condition | |
| 53 | ||
| 54 | Synthesis Notes: | |
| 55 | ||
| 56 | Modification History: | |
| 57 | ||
| 58 | Date Description | |
| 59 | ---- ----------- | |
| 60 | ||
| 61 | ************************************************************ | |
| 62 | ***********************************************************/ | |
| 63 | ||
| 64 | module niu_ipp_pkt_dsc ( | |
| 65 | ipp_hfifo_par_err_inc, | |
| 66 | ipp_runt, | |
| 67 | clr_ipp_unload, | |
| 68 | reset, | |
| 69 | clk, | |
| 70 | ipp_dsc_pkt, | |
| 71 | ipp_inc_pkt_dsc_cnt | |
| 72 | ); | |
| 73 | ||
| 74 | input ipp_hfifo_par_err_inc; | |
| 75 | input ipp_runt; | |
| 76 | input clr_ipp_unload; // 1 cycle pulse | |
| 77 | ||
| 78 | input reset; | |
| 79 | input clk; // clock | |
| 80 | ||
| 81 | output ipp_dsc_pkt; | |
| 82 | output ipp_inc_pkt_dsc_cnt; | |
| 83 | ||
| 84 | reg ipp_dsc_pkt; | |
| 85 | wire ipp_inc_pkt_dsc_cnt = ipp_dsc_pkt && clr_ipp_unload || | |
| 86 | ipp_runt; | |
| 87 | ||
| 88 | wire discard_pkt = (ipp_hfifo_par_err_inc); | |
| 89 | ||
| 90 | wire n_ipp_dsc_pkt = (reset || clr_ipp_unload) ? 1'h0 : | |
| 91 | discard_pkt ? 1'h1 : ipp_dsc_pkt; | |
| 92 | ||
| 93 | always @(posedge clk) | |
| 94 | ipp_dsc_pkt <= n_ipp_dsc_pkt; | |
| 95 | ||
| 96 | endmodule | |
| 97 |