// ========== Copyright Header Begin ==========================================
// OpenSPARC T2 Processor File: fflp_hdr_cntl.v
// Copyright (C) 1995-2007 Sun Microsystems, Inc. All Rights Reserved
// 4150 Network Circle, Santa Clara, California 95054, U.S.A.
// * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; version 2 of the License.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
// For the avoidance of doubt, and except that if any non-GPL license
// choice is available it will apply instead, Sun elects to use only
// the General Public License version 2 (GPLv2) at this time for any
// software where a choice of GPL license versions is made
// available with the language indicating that GPLv2 or any later version
// may be used, or where a choice of which version of the GPL is applied is
// otherwise unspecified.
// Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
// CA 95054 USA or visit www.sun.com if you need additional information or
// ========== Copyright Header End ============================================
/**********************************************************************/
/*module name: fflp_hdr_cntl */
/*description: Controls the hdr_shft portion of the hdr_dp */
/*parent module in: fflp_hdr.v */
/*child modules in: none */
/*author name: Jeanne Cai */
/*date created: 03-18-04 */
/* Copyright (c) 2004, Sun Microsystems, Inc. */
/* Sun Proprietary and Confidential */
/**********************************************************************/
input hdr_fifo_space_avail;
case (state) //synopsys parallel_case full_case
// 0in < case -full -parallel -message "0in ERROR: case check in fflp_hdr_cntl"
next_state = HDR_DATA_CYC1;
if (!fflp_ipp_ready & (hdr_fifo_space_avail | !hdr_shft_done & !hdr_fifo_full))
next_state = HDR_DATA_CYC2;
next_state = HDR_DATA_CYC3;
next_state = HDR_DATA_CYC4;
next_state = HDR_DATA_CYC5;
next_state = HDR_DATA_CYC6;
next_state = HDR_DATA_CYC7;
if (hdr_fifo_space_avail)
if (!fflp_ipp_ready & hdr_fifo_space_avail | fflp_ipp_ready)
dffr #(3) state_reg (cclk, reset, next_state, state);
dffr #(1) hdr_shft_done_reg (cclk, reset, shft7_reg_en, hdr_shft_done);
/*****************************************/
//fflp-ipp interface signals
/*****************************************/
hdr_dvalid <= ipp_fflp_dvalid;
assign hdr_dvalid = ipp_fflp_dvalid;
assign fflp_ipp_ready_in = fflp_ready ? 1'b1 : 1'b0;
assign fflp_ipp_ready_en = fflp_ready | hdr_dvalid;
dffre #(1) fflp_ipp_ready_reg (cclk, reset, fflp_ipp_ready_en, fflp_ipp_ready_in, fflp_ipp_ready);